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Diffstat (limited to 'core/io/image.cpp')
| -rw-r--r-- | core/io/image.cpp | 3646 |
1 files changed, 3646 insertions, 0 deletions
diff --git a/core/io/image.cpp b/core/io/image.cpp new file mode 100644 index 0000000000..3112dd217f --- /dev/null +++ b/core/io/image.cpp @@ -0,0 +1,3646 @@ +/*************************************************************************/ +/* image.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ + +#include "image.h" + +#include "core/error/error_macros.h" +#include "core/io/image_loader.h" +#include "core/io/resource_loader.h" +#include "core/math/math_funcs.h" +#include "core/string/print_string.h" +#include "core/templates/hash_map.h" + +#include <stdio.h> + +const char *Image::format_names[Image::FORMAT_MAX] = { + "Lum8", //luminance + "LumAlpha8", //luminance-alpha + "Red8", + "RedGreen", + "RGB8", + "RGBA8", + "RGBA4444", + "RGBA5551", + "RFloat", //float + "RGFloat", + "RGBFloat", + "RGBAFloat", + "RHalf", //half float + "RGHalf", + "RGBHalf", + "RGBAHalf", + "RGBE9995", + "DXT1 RGB8", //s3tc + "DXT3 RGBA8", + "DXT5 RGBA8", + "RGTC Red8", + "RGTC RedGreen8", + "BPTC_RGBA", + "BPTC_RGBF", + "BPTC_RGBFU", + "PVRTC1_2", //pvrtc + "PVRTC1_2A", + "PVRTC1_4", + "PVRTC1_4A", + "ETC", //etc1 + "ETC2_R11", //etc2 + "ETC2_R11S", //signed", NOT srgb. + "ETC2_RG11", + "ETC2_RG11S", + "ETC2_RGB8", + "ETC2_RGBA8", + "ETC2_RGB8A1", + "ETC2_RA_AS_RG", + "FORMAT_DXT5_RA_AS_RG", +}; + +SavePNGFunc Image::save_png_func = nullptr; +SaveEXRFunc Image::save_exr_func = nullptr; + +SavePNGBufferFunc Image::save_png_buffer_func = nullptr; + +void Image::_put_pixelb(int p_x, int p_y, uint32_t p_pixelsize, uint8_t *p_data, const uint8_t *p_pixel) { + uint32_t ofs = (p_y * width + p_x) * p_pixelsize; + + for (uint32_t i = 0; i < p_pixelsize; i++) { + p_data[ofs + i] = p_pixel[i]; + } +} + +void Image::_get_pixelb(int p_x, int p_y, uint32_t p_pixelsize, const uint8_t *p_data, uint8_t *p_pixel) { + uint32_t ofs = (p_y * width + p_x) * p_pixelsize; + + for (uint32_t i = 0; i < p_pixelsize; i++) { + p_pixel[i] = p_data[ofs + i]; + } +} + +int Image::get_format_pixel_size(Format p_format) { + switch (p_format) { + case FORMAT_L8: + return 1; //luminance + case FORMAT_LA8: + return 2; //luminance-alpha + case FORMAT_R8: + return 1; + case FORMAT_RG8: + return 2; + case FORMAT_RGB8: + return 3; + case FORMAT_RGBA8: + return 4; + case FORMAT_RGBA4444: + return 2; + case FORMAT_RGB565: + return 2; + case FORMAT_RF: + return 4; //float + case FORMAT_RGF: + return 8; + case FORMAT_RGBF: + return 12; + case FORMAT_RGBAF: + return 16; + case FORMAT_RH: + return 2; //half float + case FORMAT_RGH: + return 4; + case FORMAT_RGBH: + return 6; + case FORMAT_RGBAH: + return 8; + case FORMAT_RGBE9995: + return 4; + case FORMAT_DXT1: + return 1; //s3tc bc1 + case FORMAT_DXT3: + return 1; //bc2 + case FORMAT_DXT5: + return 1; //bc3 + case FORMAT_RGTC_R: + return 1; //bc4 + case FORMAT_RGTC_RG: + return 1; //bc5 + case FORMAT_BPTC_RGBA: + return 1; //btpc bc6h + case FORMAT_BPTC_RGBF: + return 1; //float / + case FORMAT_BPTC_RGBFU: + return 1; //unsigned float + case FORMAT_PVRTC1_2: + return 1; //pvrtc + case FORMAT_PVRTC1_2A: + return 1; + case FORMAT_PVRTC1_4: + return 1; + case FORMAT_PVRTC1_4A: + return 1; + case FORMAT_ETC: + return 1; //etc1 + case FORMAT_ETC2_R11: + return 1; //etc2 + case FORMAT_ETC2_R11S: + return 1; //signed: return 1; NOT srgb. + case FORMAT_ETC2_RG11: + return 1; + case FORMAT_ETC2_RG11S: + return 1; + case FORMAT_ETC2_RGB8: + return 1; + case FORMAT_ETC2_RGBA8: + return 1; + case FORMAT_ETC2_RGB8A1: + return 1; + case FORMAT_ETC2_RA_AS_RG: + return 1; + case FORMAT_DXT5_RA_AS_RG: + return 1; + case FORMAT_MAX: { + } + } + return 0; +} + +void Image::get_format_min_pixel_size(Format p_format, int &r_w, int &r_h) { + switch (p_format) { + case FORMAT_DXT1: //s3tc bc1 + case FORMAT_DXT3: //bc2 + case FORMAT_DXT5: //bc3 + case FORMAT_RGTC_R: //bc4 + case FORMAT_RGTC_RG: { //bc5 case case FORMAT_DXT1: + + r_w = 4; + r_h = 4; + } break; + case FORMAT_PVRTC1_2: + case FORMAT_PVRTC1_2A: { + r_w = 16; + r_h = 8; + } break; + case FORMAT_PVRTC1_4A: + case FORMAT_PVRTC1_4: { + r_w = 8; + r_h = 8; + } break; + case FORMAT_ETC: { + r_w = 4; + r_h = 4; + } break; + case FORMAT_BPTC_RGBA: + case FORMAT_BPTC_RGBF: + case FORMAT_BPTC_RGBFU: { + r_w = 4; + r_h = 4; + } break; + case FORMAT_ETC2_R11: //etc2 + case FORMAT_ETC2_R11S: //signed: NOT srgb. + case FORMAT_ETC2_RG11: + case FORMAT_ETC2_RG11S: + case FORMAT_ETC2_RGB8: + case FORMAT_ETC2_RGBA8: + case FORMAT_ETC2_RGB8A1: + case FORMAT_ETC2_RA_AS_RG: + case FORMAT_DXT5_RA_AS_RG: { + r_w = 4; + r_h = 4; + + } break; + + default: { + r_w = 1; + r_h = 1; + } break; + } +} + +int Image::get_format_pixel_rshift(Format p_format) { + if (p_format == FORMAT_DXT1 || p_format == FORMAT_RGTC_R || p_format == FORMAT_PVRTC1_4 || p_format == FORMAT_PVRTC1_4A || p_format == FORMAT_ETC || p_format == FORMAT_ETC2_R11 || p_format == FORMAT_ETC2_R11S || p_format == FORMAT_ETC2_RGB8 || p_format == FORMAT_ETC2_RGB8A1) { + return 1; + } else if (p_format == FORMAT_PVRTC1_2 || p_format == FORMAT_PVRTC1_2A) { + return 2; + } else { + return 0; + } +} + +int Image::get_format_block_size(Format p_format) { + switch (p_format) { + case FORMAT_DXT1: //s3tc bc1 + case FORMAT_DXT3: //bc2 + case FORMAT_DXT5: //bc3 + case FORMAT_RGTC_R: //bc4 + case FORMAT_RGTC_RG: { //bc5 case case FORMAT_DXT1: + + return 4; + } + case FORMAT_PVRTC1_2: + case FORMAT_PVRTC1_2A: { + return 4; + } + case FORMAT_PVRTC1_4A: + case FORMAT_PVRTC1_4: { + return 4; + } + case FORMAT_ETC: { + return 4; + } + case FORMAT_BPTC_RGBA: + case FORMAT_BPTC_RGBF: + case FORMAT_BPTC_RGBFU: { + return 4; + } + case FORMAT_ETC2_R11: //etc2 + case FORMAT_ETC2_R11S: //signed: NOT srgb. + case FORMAT_ETC2_RG11: + case FORMAT_ETC2_RG11S: + case FORMAT_ETC2_RGB8: + case FORMAT_ETC2_RGBA8: + case FORMAT_ETC2_RGB8A1: + case FORMAT_ETC2_RA_AS_RG: //used to make basis universal happy + case FORMAT_DXT5_RA_AS_RG: //used to make basis universal happy + + { + return 4; + } + default: { + } + } + + return 1; +} + +void Image::_get_mipmap_offset_and_size(int p_mipmap, int &r_offset, int &r_width, int &r_height) const { + int w = width; + int h = height; + int ofs = 0; + + int pixel_size = get_format_pixel_size(format); + int pixel_rshift = get_format_pixel_rshift(format); + int block = get_format_block_size(format); + int minw, minh; + get_format_min_pixel_size(format, minw, minh); + + for (int i = 0; i < p_mipmap; i++) { + int bw = w % block != 0 ? w + (block - w % block) : w; + int bh = h % block != 0 ? h + (block - h % block) : h; + + int s = bw * bh; + + s *= pixel_size; + s >>= pixel_rshift; + ofs += s; + w = MAX(minw, w >> 1); + h = MAX(minh, h >> 1); + } + + r_offset = ofs; + r_width = w; + r_height = h; +} + +int Image::get_mipmap_offset(int p_mipmap) const { + ERR_FAIL_INDEX_V(p_mipmap, get_mipmap_count() + 1, -1); + + int ofs, w, h; + _get_mipmap_offset_and_size(p_mipmap, ofs, w, h); + return ofs; +} + +int Image::get_mipmap_byte_size(int p_mipmap) const { + ERR_FAIL_INDEX_V(p_mipmap, get_mipmap_count() + 1, -1); + + int ofs, w, h; + _get_mipmap_offset_and_size(p_mipmap, ofs, w, h); + int ofs2; + _get_mipmap_offset_and_size(p_mipmap + 1, ofs2, w, h); + return ofs2 - ofs; +} + +void Image::get_mipmap_offset_and_size(int p_mipmap, int &r_ofs, int &r_size) const { + int ofs, w, h; + _get_mipmap_offset_and_size(p_mipmap, ofs, w, h); + int ofs2; + _get_mipmap_offset_and_size(p_mipmap + 1, ofs2, w, h); + r_ofs = ofs; + r_size = ofs2 - ofs; +} + +void Image::get_mipmap_offset_size_and_dimensions(int p_mipmap, int &r_ofs, int &r_size, int &w, int &h) const { + int ofs; + _get_mipmap_offset_and_size(p_mipmap, ofs, w, h); + int ofs2, w2, h2; + _get_mipmap_offset_and_size(p_mipmap + 1, ofs2, w2, h2); + r_ofs = ofs; + r_size = ofs2 - ofs; +} + +Image::Image3DValidateError Image::validate_3d_image(Image::Format p_format, int p_width, int p_height, int p_depth, bool p_mipmaps, const Vector<Ref<Image>> &p_images) { + int w = p_width; + int h = p_height; + int d = p_depth; + + int arr_ofs = 0; + + while (true) { + for (int i = 0; i < d; i++) { + int idx = i + arr_ofs; + if (idx >= p_images.size()) { + return VALIDATE_3D_ERR_MISSING_IMAGES; + } + if (p_images[idx].is_null() || p_images[idx]->is_empty()) { + return VALIDATE_3D_ERR_IMAGE_EMPTY; + } + if (p_images[idx]->get_format() != p_format) { + return VALIDATE_3D_ERR_IMAGE_FORMAT_MISMATCH; + } + if (p_images[idx]->get_width() != w || p_images[idx]->get_height() != h) { + return VALIDATE_3D_ERR_IMAGE_SIZE_MISMATCH; + } + if (p_images[idx]->has_mipmaps()) { + return VALIDATE_3D_ERR_IMAGE_HAS_MIPMAPS; + } + } + + arr_ofs += d; + + if (!p_mipmaps) { + break; + } + + if (w == 1 && h == 1 && d == 1) { + break; + } + + w = MAX(1, w >> 1); + h = MAX(1, h >> 1); + d = MAX(1, d >> 1); + } + + if (arr_ofs != p_images.size()) { + return VALIDATE_3D_ERR_EXTRA_IMAGES; + } + + return VALIDATE_3D_OK; +} + +String Image::get_3d_image_validation_error_text(Image3DValidateError p_error) { + switch (p_error) { + case VALIDATE_3D_OK: { + return TTR("Ok"); + } break; + case VALIDATE_3D_ERR_IMAGE_EMPTY: { + return TTR("Empty Image found"); + } break; + case VALIDATE_3D_ERR_MISSING_IMAGES: { + return TTR("Missing Images"); + } break; + case VALIDATE_3D_ERR_EXTRA_IMAGES: { + return TTR("Too many Images"); + } break; + case VALIDATE_3D_ERR_IMAGE_SIZE_MISMATCH: { + return TTR("Image size mismatch"); + } break; + case VALIDATE_3D_ERR_IMAGE_FORMAT_MISMATCH: { + return TTR("Image format mismatch"); + } break; + case VALIDATE_3D_ERR_IMAGE_HAS_MIPMAPS: { + return TTR("Image has included mipmaps"); + } break; + } + return String(); +} + +int Image::get_width() const { + return width; +} + +int Image::get_height() const { + return height; +} + +Vector2 Image::get_size() const { + return Vector2(width, height); +} + +bool Image::has_mipmaps() const { + return mipmaps; +} + +int Image::get_mipmap_count() const { + if (mipmaps) { + return get_image_required_mipmaps(width, height, format); + } else { + return 0; + } +} + +//using template generates perfectly optimized code due to constant expression reduction and unused variable removal present in all compilers +template <uint32_t read_bytes, bool read_alpha, uint32_t write_bytes, bool write_alpha, bool read_gray, bool write_gray> +static void _convert(int p_width, int p_height, const uint8_t *p_src, uint8_t *p_dst) { + uint32_t max_bytes = MAX(read_bytes, write_bytes); + + for (int y = 0; y < p_height; y++) { + for (int x = 0; x < p_width; x++) { + const uint8_t *rofs = &p_src[((y * p_width) + x) * (read_bytes + (read_alpha ? 1 : 0))]; + uint8_t *wofs = &p_dst[((y * p_width) + x) * (write_bytes + (write_alpha ? 1 : 0))]; + + uint8_t rgba[4]; + + if (read_gray) { + rgba[0] = rofs[0]; + rgba[1] = rofs[0]; + rgba[2] = rofs[0]; + } else { + for (uint32_t i = 0; i < max_bytes; i++) { + rgba[i] = (i < read_bytes) ? rofs[i] : 0; + } + } + + if (read_alpha || write_alpha) { + rgba[3] = read_alpha ? rofs[read_bytes] : 255; + } + + if (write_gray) { + //TODO: not correct grayscale, should use fixed point version of actual weights + wofs[0] = uint8_t((uint16_t(rofs[0]) + uint16_t(rofs[1]) + uint16_t(rofs[2])) / 3); + } else { + for (uint32_t i = 0; i < write_bytes; i++) { + wofs[i] = rgba[i]; + } + } + + if (write_alpha) { + wofs[write_bytes] = rgba[3]; + } + } + } +} + +void Image::convert(Format p_new_format) { + if (data.size() == 0) { + return; + } + + if (p_new_format == format) { + return; + } + + if (format > FORMAT_RGBE9995 || p_new_format > FORMAT_RGBE9995) { + ERR_FAIL_MSG("Cannot convert to <-> from compressed formats. Use compress() and decompress() instead."); + + } else if (format > FORMAT_RGBA8 || p_new_format > FORMAT_RGBA8) { + //use put/set pixel which is slower but works with non byte formats + Image new_img(width, height, false, p_new_format); + + for (int i = 0; i < width; i++) { + for (int j = 0; j < height; j++) { + new_img.set_pixel(i, j, get_pixel(i, j)); + } + } + + if (has_mipmaps()) { + new_img.generate_mipmaps(); + } + + _copy_internals_from(new_img); + + return; + } + + Image new_img(width, height, false, p_new_format); + + const uint8_t *rptr = data.ptr(); + uint8_t *wptr = new_img.data.ptrw(); + + int conversion_type = format | p_new_format << 8; + + switch (conversion_type) { + case FORMAT_L8 | (FORMAT_LA8 << 8): + _convert<1, false, 1, true, true, true>(width, height, rptr, wptr); + break; + case FORMAT_L8 | (FORMAT_R8 << 8): + _convert<1, false, 1, false, true, false>(width, height, rptr, wptr); + break; + case FORMAT_L8 | (FORMAT_RG8 << 8): + _convert<1, false, 2, false, true, false>(width, height, rptr, wptr); + break; + case FORMAT_L8 | (FORMAT_RGB8 << 8): + _convert<1, false, 3, false, true, false>(width, height, rptr, wptr); + break; + case FORMAT_L8 | (FORMAT_RGBA8 << 8): + _convert<1, false, 3, true, true, false>(width, height, rptr, wptr); + break; + case FORMAT_LA8 | (FORMAT_L8 << 8): + _convert<1, true, 1, false, true, true>(width, height, rptr, wptr); + break; + case FORMAT_LA8 | (FORMAT_R8 << 8): + _convert<1, true, 1, false, true, false>(width, height, rptr, wptr); + break; + case FORMAT_LA8 | (FORMAT_RG8 << 8): + _convert<1, true, 2, false, true, false>(width, height, rptr, wptr); + break; + case FORMAT_LA8 | (FORMAT_RGB8 << 8): + _convert<1, true, 3, false, true, false>(width, height, rptr, wptr); + break; + case FORMAT_LA8 | (FORMAT_RGBA8 << 8): + _convert<1, true, 3, true, true, false>(width, height, rptr, wptr); + break; + case FORMAT_R8 | (FORMAT_L8 << 8): + _convert<1, false, 1, false, false, true>(width, height, rptr, wptr); + break; + case FORMAT_R8 | (FORMAT_LA8 << 8): + _convert<1, false, 1, true, false, true>(width, height, rptr, wptr); + break; + case FORMAT_R8 | (FORMAT_RG8 << 8): + _convert<1, false, 2, false, false, false>(width, height, rptr, wptr); + break; + case FORMAT_R8 | (FORMAT_RGB8 << 8): + _convert<1, false, 3, false, false, false>(width, height, rptr, wptr); + break; + case FORMAT_R8 | (FORMAT_RGBA8 << 8): + _convert<1, false, 3, true, false, false>(width, height, rptr, wptr); + break; + case FORMAT_RG8 | (FORMAT_L8 << 8): + _convert<2, false, 1, false, false, true>(width, height, rptr, wptr); + break; + case FORMAT_RG8 | (FORMAT_LA8 << 8): + _convert<2, false, 1, true, false, true>(width, height, rptr, wptr); + break; + case FORMAT_RG8 | (FORMAT_R8 << 8): + _convert<2, false, 1, false, false, false>(width, height, rptr, wptr); + break; + case FORMAT_RG8 | (FORMAT_RGB8 << 8): + _convert<2, false, 3, false, false, false>(width, height, rptr, wptr); + break; + case FORMAT_RG8 | (FORMAT_RGBA8 << 8): + _convert<2, false, 3, true, false, false>(width, height, rptr, wptr); + break; + case FORMAT_RGB8 | (FORMAT_L8 << 8): + _convert<3, false, 1, false, false, true>(width, height, rptr, wptr); + break; + case FORMAT_RGB8 | (FORMAT_LA8 << 8): + _convert<3, false, 1, true, false, true>(width, height, rptr, wptr); + break; + case FORMAT_RGB8 | (FORMAT_R8 << 8): + _convert<3, false, 1, false, false, false>(width, height, rptr, wptr); + break; + case FORMAT_RGB8 | (FORMAT_RG8 << 8): + _convert<3, false, 2, false, false, false>(width, height, rptr, wptr); + break; + case FORMAT_RGB8 | (FORMAT_RGBA8 << 8): + _convert<3, false, 3, true, false, false>(width, height, rptr, wptr); + break; + case FORMAT_RGBA8 | (FORMAT_L8 << 8): + _convert<3, true, 1, false, false, true>(width, height, rptr, wptr); + break; + case FORMAT_RGBA8 | (FORMAT_LA8 << 8): + _convert<3, true, 1, true, false, true>(width, height, rptr, wptr); + break; + case FORMAT_RGBA8 | (FORMAT_R8 << 8): + _convert<3, true, 1, false, false, false>(width, height, rptr, wptr); + break; + case FORMAT_RGBA8 | (FORMAT_RG8 << 8): + _convert<3, true, 2, false, false, false>(width, height, rptr, wptr); + break; + case FORMAT_RGBA8 | (FORMAT_RGB8 << 8): + _convert<3, true, 3, false, false, false>(width, height, rptr, wptr); + break; + } + + bool gen_mipmaps = mipmaps; + + _copy_internals_from(new_img); + + if (gen_mipmaps) { + generate_mipmaps(); + } +} + +Image::Format Image::get_format() const { + return format; +} + +static double _bicubic_interp_kernel(double x) { + x = ABS(x); + + double bc = 0; + + if (x <= 1) { + bc = (1.5 * x - 2.5) * x * x + 1; + } else if (x < 2) { + bc = ((-0.5 * x + 2.5) * x - 4) * x + 2; + } + + return bc; +} + +template <int CC, class T> +static void _scale_cubic(const uint8_t *__restrict p_src, uint8_t *__restrict p_dst, uint32_t p_src_width, uint32_t p_src_height, uint32_t p_dst_width, uint32_t p_dst_height) { + // get source image size + int width = p_src_width; + int height = p_src_height; + double xfac = (double)width / p_dst_width; + double yfac = (double)height / p_dst_height; + // coordinates of source points and coefficients + double ox, oy, dx, dy, k1, k2; + int ox1, oy1, ox2, oy2; + // destination pixel values + // width and height decreased by 1 + int ymax = height - 1; + int xmax = width - 1; + // temporary pointer + + for (uint32_t y = 0; y < p_dst_height; y++) { + // Y coordinates + oy = (double)y * yfac - 0.5f; + oy1 = (int)oy; + dy = oy - (double)oy1; + + for (uint32_t x = 0; x < p_dst_width; x++) { + // X coordinates + ox = (double)x * xfac - 0.5f; + ox1 = (int)ox; + dx = ox - (double)ox1; + + // initial pixel value + + T *__restrict dst = ((T *)p_dst) + (y * p_dst_width + x) * CC; + + double color[CC]; + for (int i = 0; i < CC; i++) { + color[i] = 0; + } + + for (int n = -1; n < 3; n++) { + // get Y coefficient + k1 = _bicubic_interp_kernel(dy - (double)n); + + oy2 = oy1 + n; + if (oy2 < 0) { + oy2 = 0; + } + if (oy2 > ymax) { + oy2 = ymax; + } + + for (int m = -1; m < 3; m++) { + // get X coefficient + k2 = k1 * _bicubic_interp_kernel((double)m - dx); + + ox2 = ox1 + m; + if (ox2 < 0) { + ox2 = 0; + } + if (ox2 > xmax) { + ox2 = xmax; + } + + // get pixel of original image + const T *__restrict p = ((T *)p_src) + (oy2 * p_src_width + ox2) * CC; + + for (int i = 0; i < CC; i++) { + if (sizeof(T) == 2) { //half float + color[i] = Math::half_to_float(p[i]); + } else { + color[i] += p[i] * k2; + } + } + } + } + + for (int i = 0; i < CC; i++) { + if (sizeof(T) == 1) { //byte + dst[i] = CLAMP(Math::fast_ftoi(color[i]), 0, 255); + } else if (sizeof(T) == 2) { //half float + dst[i] = Math::make_half_float(color[i]); + } else { + dst[i] = color[i]; + } + } + } + } +} + +template <int CC, class T> +static void _scale_bilinear(const uint8_t *__restrict p_src, uint8_t *__restrict p_dst, uint32_t p_src_width, uint32_t p_src_height, uint32_t p_dst_width, uint32_t p_dst_height) { + enum { + FRAC_BITS = 8, + FRAC_LEN = (1 << FRAC_BITS), + FRAC_HALF = (FRAC_LEN >> 1), + FRAC_MASK = FRAC_LEN - 1 + }; + + for (uint32_t i = 0; i < p_dst_height; i++) { + // Add 0.5 in order to interpolate based on pixel center + uint32_t src_yofs_up_fp = (i + 0.5) * p_src_height * FRAC_LEN / p_dst_height; + // Calculate nearest src pixel center above current, and truncate to get y index + uint32_t src_yofs_up = src_yofs_up_fp >= FRAC_HALF ? (src_yofs_up_fp - FRAC_HALF) >> FRAC_BITS : 0; + uint32_t src_yofs_down = (src_yofs_up_fp + FRAC_HALF) >> FRAC_BITS; + if (src_yofs_down >= p_src_height) { + src_yofs_down = p_src_height - 1; + } + // Calculate distance to pixel center of src_yofs_up + uint32_t src_yofs_frac = src_yofs_up_fp & FRAC_MASK; + src_yofs_frac = src_yofs_frac >= FRAC_HALF ? src_yofs_frac - FRAC_HALF : src_yofs_frac + FRAC_HALF; + + uint32_t y_ofs_up = src_yofs_up * p_src_width * CC; + uint32_t y_ofs_down = src_yofs_down * p_src_width * CC; + + for (uint32_t j = 0; j < p_dst_width; j++) { + uint32_t src_xofs_left_fp = (j + 0.5) * p_src_width * FRAC_LEN / p_dst_width; + uint32_t src_xofs_left = src_xofs_left_fp >= FRAC_HALF ? (src_xofs_left_fp - FRAC_HALF) >> FRAC_BITS : 0; + uint32_t src_xofs_right = (src_xofs_left_fp + FRAC_HALF) >> FRAC_BITS; + if (src_xofs_right >= p_src_width) { + src_xofs_right = p_src_width - 1; + } + uint32_t src_xofs_frac = src_xofs_left_fp & FRAC_MASK; + src_xofs_frac = src_xofs_frac >= FRAC_HALF ? src_xofs_frac - FRAC_HALF : src_xofs_frac + FRAC_HALF; + + src_xofs_left *= CC; + src_xofs_right *= CC; + + for (uint32_t l = 0; l < CC; l++) { + if (sizeof(T) == 1) { //uint8 + uint32_t p00 = p_src[y_ofs_up + src_xofs_left + l] << FRAC_BITS; + uint32_t p10 = p_src[y_ofs_up + src_xofs_right + l] << FRAC_BITS; + uint32_t p01 = p_src[y_ofs_down + src_xofs_left + l] << FRAC_BITS; + uint32_t p11 = p_src[y_ofs_down + src_xofs_right + l] << FRAC_BITS; + + uint32_t interp_up = p00 + (((p10 - p00) * src_xofs_frac) >> FRAC_BITS); + uint32_t interp_down = p01 + (((p11 - p01) * src_xofs_frac) >> FRAC_BITS); + uint32_t interp = interp_up + (((interp_down - interp_up) * src_yofs_frac) >> FRAC_BITS); + interp >>= FRAC_BITS; + p_dst[i * p_dst_width * CC + j * CC + l] = interp; + } else if (sizeof(T) == 2) { //half float + + float xofs_frac = float(src_xofs_frac) / (1 << FRAC_BITS); + float yofs_frac = float(src_yofs_frac) / (1 << FRAC_BITS); + const T *src = ((const T *)p_src); + T *dst = ((T *)p_dst); + + float p00 = Math::half_to_float(src[y_ofs_up + src_xofs_left + l]); + float p10 = Math::half_to_float(src[y_ofs_up + src_xofs_right + l]); + float p01 = Math::half_to_float(src[y_ofs_down + src_xofs_left + l]); + float p11 = Math::half_to_float(src[y_ofs_down + src_xofs_right + l]); + + float interp_up = p00 + (p10 - p00) * xofs_frac; + float interp_down = p01 + (p11 - p01) * xofs_frac; + float interp = interp_up + ((interp_down - interp_up) * yofs_frac); + + dst[i * p_dst_width * CC + j * CC + l] = Math::make_half_float(interp); + } else if (sizeof(T) == 4) { //float + + float xofs_frac = float(src_xofs_frac) / (1 << FRAC_BITS); + float yofs_frac = float(src_yofs_frac) / (1 << FRAC_BITS); + const T *src = ((const T *)p_src); + T *dst = ((T *)p_dst); + + float p00 = src[y_ofs_up + src_xofs_left + l]; + float p10 = src[y_ofs_up + src_xofs_right + l]; + float p01 = src[y_ofs_down + src_xofs_left + l]; + float p11 = src[y_ofs_down + src_xofs_right + l]; + + float interp_up = p00 + (p10 - p00) * xofs_frac; + float interp_down = p01 + (p11 - p01) * xofs_frac; + float interp = interp_up + ((interp_down - interp_up) * yofs_frac); + + dst[i * p_dst_width * CC + j * CC + l] = interp; + } + } + } + } +} + +template <int CC, class T> +static void _scale_nearest(const uint8_t *__restrict p_src, uint8_t *__restrict p_dst, uint32_t p_src_width, uint32_t p_src_height, uint32_t p_dst_width, uint32_t p_dst_height) { + for (uint32_t i = 0; i < p_dst_height; i++) { + uint32_t src_yofs = i * p_src_height / p_dst_height; + uint32_t y_ofs = src_yofs * p_src_width * CC; + + for (uint32_t j = 0; j < p_dst_width; j++) { + uint32_t src_xofs = j * p_src_width / p_dst_width; + src_xofs *= CC; + + for (uint32_t l = 0; l < CC; l++) { + const T *src = ((const T *)p_src); + T *dst = ((T *)p_dst); + + T p = src[y_ofs + src_xofs + l]; + dst[i * p_dst_width * CC + j * CC + l] = p; + } + } + } +} + +#define LANCZOS_TYPE 3 + +static float _lanczos(float p_x) { + return Math::abs(p_x) >= LANCZOS_TYPE ? 0 : Math::sincn(p_x) * Math::sincn(p_x / LANCZOS_TYPE); +} + +template <int CC, class T> +static void _scale_lanczos(const uint8_t *__restrict p_src, uint8_t *__restrict p_dst, uint32_t p_src_width, uint32_t p_src_height, uint32_t p_dst_width, uint32_t p_dst_height) { + int32_t src_width = p_src_width; + int32_t src_height = p_src_height; + int32_t dst_height = p_dst_height; + int32_t dst_width = p_dst_width; + + uint32_t buffer_size = src_height * dst_width * CC; + float *buffer = memnew_arr(float, buffer_size); // Store the first pass in a buffer + + { // FIRST PASS (horizontal) + + float x_scale = float(src_width) / float(dst_width); + + float scale_factor = MAX(x_scale, 1); // A larger kernel is required only when downscaling + int32_t half_kernel = LANCZOS_TYPE * scale_factor; + + float *kernel = memnew_arr(float, half_kernel * 2); + + for (int32_t buffer_x = 0; buffer_x < dst_width; buffer_x++) { + // The corresponding point on the source image + float src_x = (buffer_x + 0.5f) * x_scale; // Offset by 0.5 so it uses the pixel's center + int32_t start_x = MAX(0, int32_t(src_x) - half_kernel + 1); + int32_t end_x = MIN(src_width - 1, int32_t(src_x) + half_kernel); + + // Create the kernel used by all the pixels of the column + for (int32_t target_x = start_x; target_x <= end_x; target_x++) { + kernel[target_x - start_x] = _lanczos((target_x + 0.5f - src_x) / scale_factor); + } + + for (int32_t buffer_y = 0; buffer_y < src_height; buffer_y++) { + float pixel[CC] = { 0 }; + float weight = 0; + + for (int32_t target_x = start_x; target_x <= end_x; target_x++) { + float lanczos_val = kernel[target_x - start_x]; + weight += lanczos_val; + + const T *__restrict src_data = ((const T *)p_src) + (buffer_y * src_width + target_x) * CC; + + for (uint32_t i = 0; i < CC; i++) { + if (sizeof(T) == 2) { //half float + pixel[i] += Math::half_to_float(src_data[i]) * lanczos_val; + } else { + pixel[i] += src_data[i] * lanczos_val; + } + } + } + + float *dst_data = ((float *)buffer) + (buffer_y * dst_width + buffer_x) * CC; + + for (uint32_t i = 0; i < CC; i++) { + dst_data[i] = pixel[i] / weight; // Normalize the sum of all the samples + } + } + } + + memdelete_arr(kernel); + } // End of first pass + + { // SECOND PASS (vertical + result) + + float y_scale = float(src_height) / float(dst_height); + + float scale_factor = MAX(y_scale, 1); + int32_t half_kernel = LANCZOS_TYPE * scale_factor; + + float *kernel = memnew_arr(float, half_kernel * 2); + + for (int32_t dst_y = 0; dst_y < dst_height; dst_y++) { + float buffer_y = (dst_y + 0.5f) * y_scale; + int32_t start_y = MAX(0, int32_t(buffer_y) - half_kernel + 1); + int32_t end_y = MIN(src_height - 1, int32_t(buffer_y) + half_kernel); + + for (int32_t target_y = start_y; target_y <= end_y; target_y++) { + kernel[target_y - start_y] = _lanczos((target_y + 0.5f - buffer_y) / scale_factor); + } + + for (int32_t dst_x = 0; dst_x < dst_width; dst_x++) { + float pixel[CC] = { 0 }; + float weight = 0; + + for (int32_t target_y = start_y; target_y <= end_y; target_y++) { + float lanczos_val = kernel[target_y - start_y]; + weight += lanczos_val; + + float *buffer_data = ((float *)buffer) + (target_y * dst_width + dst_x) * CC; + + for (uint32_t i = 0; i < CC; i++) { + pixel[i] += buffer_data[i] * lanczos_val; + } + } + + T *dst_data = ((T *)p_dst) + (dst_y * dst_width + dst_x) * CC; + + for (uint32_t i = 0; i < CC; i++) { + pixel[i] /= weight; + + if (sizeof(T) == 1) { //byte + dst_data[i] = CLAMP(Math::fast_ftoi(pixel[i]), 0, 255); + } else if (sizeof(T) == 2) { //half float + dst_data[i] = Math::make_half_float(pixel[i]); + } else { // float + dst_data[i] = pixel[i]; + } + } + } + } + + memdelete_arr(kernel); + } // End of second pass + + memdelete_arr(buffer); +} + +static void _overlay(const uint8_t *__restrict p_src, uint8_t *__restrict p_dst, float p_alpha, uint32_t p_width, uint32_t p_height, uint32_t p_pixel_size) { + uint16_t alpha = MIN((uint16_t)(p_alpha * 256.0f), 256); + + for (uint32_t i = 0; i < p_width * p_height * p_pixel_size; i++) { + p_dst[i] = (p_dst[i] * (256 - alpha) + p_src[i] * alpha) >> 8; + } +} + +bool Image::is_size_po2() const { + return uint32_t(width) == next_power_of_2(width) && uint32_t(height) == next_power_of_2(height); +} + +void Image::resize_to_po2(bool p_square, Interpolation p_interpolation) { + ERR_FAIL_COND_MSG(!_can_modify(format), "Cannot resize in compressed or custom image formats."); + + int w = next_power_of_2(width); + int h = next_power_of_2(height); + if (p_square) { + w = h = MAX(w, h); + } + + if (w == width && h == height) { + if (!p_square || w == h) { + return; //nothing to do + } + } + + resize(w, h, p_interpolation); +} + +void Image::resize(int p_width, int p_height, Interpolation p_interpolation) { + ERR_FAIL_COND_MSG(data.size() == 0, "Cannot resize image before creating it, use create() or create_from_data() first."); + ERR_FAIL_COND_MSG(!_can_modify(format), "Cannot resize in compressed or custom image formats."); + + bool mipmap_aware = p_interpolation == INTERPOLATE_TRILINEAR /* || p_interpolation == INTERPOLATE_TRICUBIC */; + + ERR_FAIL_COND_MSG(p_width <= 0, "Image width must be greater than 0."); + ERR_FAIL_COND_MSG(p_height <= 0, "Image height must be greater than 0."); + ERR_FAIL_COND_MSG(p_width > MAX_WIDTH, "Image width cannot be greater than " + itos(MAX_WIDTH) + "."); + ERR_FAIL_COND_MSG(p_height > MAX_HEIGHT, "Image height cannot be greater than " + itos(MAX_HEIGHT) + "."); + ERR_FAIL_COND_MSG(p_width * p_height > MAX_PIXELS, "Too many pixels for image, maximum is " + itos(MAX_PIXELS)); + + if (p_width == width && p_height == height) { + return; + } + + Image dst(p_width, p_height, false, format); + + // Setup mipmap-aware scaling + Image dst2; + int mip1 = 0; + int mip2 = 0; + float mip1_weight = 0; + if (mipmap_aware) { + float avg_scale = ((float)p_width / width + (float)p_height / height) * 0.5f; + if (avg_scale >= 1.0f) { + mipmap_aware = false; + } else { + float level = Math::log(1.0f / avg_scale) / Math::log(2.0f); + mip1 = CLAMP((int)Math::floor(level), 0, get_mipmap_count()); + mip2 = CLAMP((int)Math::ceil(level), 0, get_mipmap_count()); + mip1_weight = 1.0f - (level - mip1); + } + } + bool interpolate_mipmaps = mipmap_aware && mip1 != mip2; + if (interpolate_mipmaps) { + dst2.create(p_width, p_height, false, format); + } + + bool had_mipmaps = mipmaps; + if (interpolate_mipmaps && !had_mipmaps) { + generate_mipmaps(); + } + // -- + + const uint8_t *r = data.ptr(); + const unsigned char *r_ptr = r; + + uint8_t *w = dst.data.ptrw(); + unsigned char *w_ptr = w; + + switch (p_interpolation) { + case INTERPOLATE_NEAREST: { + if (format >= FORMAT_L8 && format <= FORMAT_RGBA8) { + switch (get_format_pixel_size(format)) { + case 1: + _scale_nearest<1, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 2: + _scale_nearest<2, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 3: + _scale_nearest<3, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 4: + _scale_nearest<4, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + } + } else if (format >= FORMAT_RF && format <= FORMAT_RGBAF) { + switch (get_format_pixel_size(format)) { + case 4: + _scale_nearest<1, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 8: + _scale_nearest<2, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 12: + _scale_nearest<3, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 16: + _scale_nearest<4, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + } + + } else if (format >= FORMAT_RH && format <= FORMAT_RGBAH) { + switch (get_format_pixel_size(format)) { + case 2: + _scale_nearest<1, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 4: + _scale_nearest<2, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 6: + _scale_nearest<3, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 8: + _scale_nearest<4, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + } + } + + } break; + case INTERPOLATE_BILINEAR: + case INTERPOLATE_TRILINEAR: { + for (int i = 0; i < 2; ++i) { + int src_width; + int src_height; + const unsigned char *src_ptr; + + if (!mipmap_aware) { + if (i == 0) { + // Standard behavior + src_width = width; + src_height = height; + src_ptr = r_ptr; + } else { + // No need for a second iteration + break; + } + } else { + if (i == 0) { + // Read from the first mipmap that will be interpolated + // (if both levels are the same, we will not interpolate, but at least we'll sample from the right level) + int offs; + _get_mipmap_offset_and_size(mip1, offs, src_width, src_height); + src_ptr = r_ptr + offs; + } else if (!interpolate_mipmaps) { + // No need generate a second image + break; + } else { + // Switch to read from the second mipmap that will be interpolated + int offs; + _get_mipmap_offset_and_size(mip2, offs, src_width, src_height); + src_ptr = r_ptr + offs; + // Switch to write to the second destination image + w = dst2.data.ptrw(); + w_ptr = w; + } + } + + if (format >= FORMAT_L8 && format <= FORMAT_RGBA8) { + switch (get_format_pixel_size(format)) { + case 1: + _scale_bilinear<1, uint8_t>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + case 2: + _scale_bilinear<2, uint8_t>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + case 3: + _scale_bilinear<3, uint8_t>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + case 4: + _scale_bilinear<4, uint8_t>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + } + } else if (format >= FORMAT_RF && format <= FORMAT_RGBAF) { + switch (get_format_pixel_size(format)) { + case 4: + _scale_bilinear<1, float>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + case 8: + _scale_bilinear<2, float>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + case 12: + _scale_bilinear<3, float>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + case 16: + _scale_bilinear<4, float>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + } + } else if (format >= FORMAT_RH && format <= FORMAT_RGBAH) { + switch (get_format_pixel_size(format)) { + case 2: + _scale_bilinear<1, uint16_t>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + case 4: + _scale_bilinear<2, uint16_t>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + case 6: + _scale_bilinear<3, uint16_t>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + case 8: + _scale_bilinear<4, uint16_t>(src_ptr, w_ptr, src_width, src_height, p_width, p_height); + break; + } + } + } + + if (interpolate_mipmaps) { + // Switch to read again from the first scaled mipmap to overlay it over the second + r = dst.data.ptr(); + _overlay(r, w, mip1_weight, p_width, p_height, get_format_pixel_size(format)); + } + + } break; + case INTERPOLATE_CUBIC: { + if (format >= FORMAT_L8 && format <= FORMAT_RGBA8) { + switch (get_format_pixel_size(format)) { + case 1: + _scale_cubic<1, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 2: + _scale_cubic<2, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 3: + _scale_cubic<3, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 4: + _scale_cubic<4, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + } + } else if (format >= FORMAT_RF && format <= FORMAT_RGBAF) { + switch (get_format_pixel_size(format)) { + case 4: + _scale_cubic<1, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 8: + _scale_cubic<2, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 12: + _scale_cubic<3, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 16: + _scale_cubic<4, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + } + } else if (format >= FORMAT_RH && format <= FORMAT_RGBAH) { + switch (get_format_pixel_size(format)) { + case 2: + _scale_cubic<1, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 4: + _scale_cubic<2, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 6: + _scale_cubic<3, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 8: + _scale_cubic<4, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + } + } + } break; + case INTERPOLATE_LANCZOS: { + if (format >= FORMAT_L8 && format <= FORMAT_RGBA8) { + switch (get_format_pixel_size(format)) { + case 1: + _scale_lanczos<1, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 2: + _scale_lanczos<2, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 3: + _scale_lanczos<3, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 4: + _scale_lanczos<4, uint8_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + } + } else if (format >= FORMAT_RF && format <= FORMAT_RGBAF) { + switch (get_format_pixel_size(format)) { + case 4: + _scale_lanczos<1, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 8: + _scale_lanczos<2, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 12: + _scale_lanczos<3, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 16: + _scale_lanczos<4, float>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + } + } else if (format >= FORMAT_RH && format <= FORMAT_RGBAH) { + switch (get_format_pixel_size(format)) { + case 2: + _scale_lanczos<1, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 4: + _scale_lanczos<2, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 6: + _scale_lanczos<3, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + case 8: + _scale_lanczos<4, uint16_t>(r_ptr, w_ptr, width, height, p_width, p_height); + break; + } + } + } break; + } + + if (interpolate_mipmaps) { + dst._copy_internals_from(dst2); + } + + if (had_mipmaps) { + dst.generate_mipmaps(); + } + + _copy_internals_from(dst); +} + +void Image::crop_from_point(int p_x, int p_y, int p_width, int p_height) { + ERR_FAIL_COND_MSG(!_can_modify(format), "Cannot crop in compressed or custom image formats."); + + ERR_FAIL_COND_MSG(p_x < 0, "Start x position cannot be smaller than 0."); + ERR_FAIL_COND_MSG(p_y < 0, "Start y position cannot be smaller than 0."); + ERR_FAIL_COND_MSG(p_width <= 0, "Width of image must be greater than 0."); + ERR_FAIL_COND_MSG(p_height <= 0, "Height of image must be greater than 0."); + ERR_FAIL_COND_MSG(p_x + p_width > MAX_WIDTH, "End x position cannot be greater than " + itos(MAX_WIDTH) + "."); + ERR_FAIL_COND_MSG(p_y + p_height > MAX_HEIGHT, "End y position cannot be greater than " + itos(MAX_HEIGHT) + "."); + + /* to save memory, cropping should be done in-place, however, since this function + will most likely either not be used much, or in critical areas, for now it won't, because + it's a waste of time. */ + + if (p_width == width && p_height == height && p_x == 0 && p_y == 0) { + return; + } + + uint8_t pdata[16]; //largest is 16 + uint32_t pixel_size = get_format_pixel_size(format); + + Image dst(p_width, p_height, false, format); + + { + const uint8_t *r = data.ptr(); + uint8_t *w = dst.data.ptrw(); + + int m_h = p_y + p_height; + int m_w = p_x + p_width; + for (int y = p_y; y < m_h; y++) { + for (int x = p_x; x < m_w; x++) { + if ((x >= width || y >= height)) { + for (uint32_t i = 0; i < pixel_size; i++) { + pdata[i] = 0; + } + } else { + _get_pixelb(x, y, pixel_size, r, pdata); + } + + dst._put_pixelb(x - p_x, y - p_y, pixel_size, w, pdata); + } + } + } + + if (has_mipmaps()) { + dst.generate_mipmaps(); + } + _copy_internals_from(dst); +} + +void Image::crop(int p_width, int p_height) { + crop_from_point(0, 0, p_width, p_height); +} + +void Image::flip_y() { + ERR_FAIL_COND_MSG(!_can_modify(format), "Cannot flip_y in compressed or custom image formats."); + + bool used_mipmaps = has_mipmaps(); + if (used_mipmaps) { + clear_mipmaps(); + } + + { + uint8_t *w = data.ptrw(); + uint8_t up[16]; + uint8_t down[16]; + uint32_t pixel_size = get_format_pixel_size(format); + + for (int y = 0; y < height / 2; y++) { + for (int x = 0; x < width; x++) { + _get_pixelb(x, y, pixel_size, w, up); + _get_pixelb(x, height - y - 1, pixel_size, w, down); + + _put_pixelb(x, height - y - 1, pixel_size, w, up); + _put_pixelb(x, y, pixel_size, w, down); + } + } + } + + if (used_mipmaps) { + generate_mipmaps(); + } +} + +void Image::flip_x() { + ERR_FAIL_COND_MSG(!_can_modify(format), "Cannot flip_x in compressed or custom image formats."); + + bool used_mipmaps = has_mipmaps(); + if (used_mipmaps) { + clear_mipmaps(); + } + + { + uint8_t *w = data.ptrw(); + uint8_t up[16]; + uint8_t down[16]; + uint32_t pixel_size = get_format_pixel_size(format); + + for (int y = 0; y < height; y++) { + for (int x = 0; x < width / 2; x++) { + _get_pixelb(x, y, pixel_size, w, up); + _get_pixelb(width - x - 1, y, pixel_size, w, down); + + _put_pixelb(width - x - 1, y, pixel_size, w, up); + _put_pixelb(x, y, pixel_size, w, down); + } + } + } + + if (used_mipmaps) { + generate_mipmaps(); + } +} + +/// Get mipmap size and offset. +int Image::_get_dst_image_size(int p_width, int p_height, Format p_format, int &r_mipmaps, int p_mipmaps, int *r_mm_width, int *r_mm_height) { + // Data offset in mipmaps (including the original texture). + int size = 0; + + int w = p_width; + int h = p_height; + + // Current mipmap index in the loop below. p_mipmaps is the target mipmap index. + // In this function, mipmap 0 represents the first mipmap instead of the original texture. + int mm = 0; + + int pixsize = get_format_pixel_size(p_format); + int pixshift = get_format_pixel_rshift(p_format); + int block = get_format_block_size(p_format); + + // Technically, you can still compress up to 1 px no matter the format, so commenting this. + //int minw, minh; + //get_format_min_pixel_size(p_format, minw, minh); + int minw = 1, minh = 1; + + while (true) { + int bw = w % block != 0 ? w + (block - w % block) : w; + int bh = h % block != 0 ? h + (block - h % block) : h; + + int s = bw * bh; + + s *= pixsize; + s >>= pixshift; + + size += s; + + if (p_mipmaps >= 0) { + w = MAX(minw, w >> 1); + h = MAX(minh, h >> 1); + } else { + if (w == minw && h == minh) { + break; + } + w = MAX(minw, w >> 1); + h = MAX(minh, h >> 1); + } + + // Set mipmap size. + // It might be necessary to put this after the minimum mipmap size check because of the possible occurrence of "1 >> 1". + if (r_mm_width) { + *r_mm_width = bw >> 1; + } + if (r_mm_height) { + *r_mm_height = bh >> 1; + } + + // Reach target mipmap. + if (p_mipmaps >= 0 && mm == p_mipmaps) { + break; + } + + mm++; + } + + r_mipmaps = mm; + return size; +} + +bool Image::_can_modify(Format p_format) const { + return p_format <= FORMAT_RGBE9995; +} + +template <class Component, int CC, bool renormalize, + void (*average_func)(Component &, const Component &, const Component &, const Component &, const Component &), + void (*renormalize_func)(Component *)> +static void _generate_po2_mipmap(const Component *p_src, Component *p_dst, uint32_t p_width, uint32_t p_height) { + //fast power of 2 mipmap generation + uint32_t dst_w = MAX(p_width >> 1, 1); + uint32_t dst_h = MAX(p_height >> 1, 1); + + int right_step = (p_width == 1) ? 0 : CC; + int down_step = (p_height == 1) ? 0 : (p_width * CC); + + for (uint32_t i = 0; i < dst_h; i++) { + const Component *rup_ptr = &p_src[i * 2 * down_step]; + const Component *rdown_ptr = rup_ptr + down_step; + Component *dst_ptr = &p_dst[i * dst_w * CC]; + uint32_t count = dst_w; + + while (count) { + count--; + for (int j = 0; j < CC; j++) { + average_func(dst_ptr[j], rup_ptr[j], rup_ptr[j + right_step], rdown_ptr[j], rdown_ptr[j + right_step]); + } + + if (renormalize) { + renormalize_func(dst_ptr); + } + + dst_ptr += CC; + rup_ptr += right_step * 2; + rdown_ptr += right_step * 2; + } + } +} + +void Image::shrink_x2() { + ERR_FAIL_COND(data.size() == 0); + + if (mipmaps) { + //just use the lower mipmap as base and copy all + Vector<uint8_t> new_img; + + int ofs = get_mipmap_offset(1); + + int new_size = data.size() - ofs; + new_img.resize(new_size); + ERR_FAIL_COND(new_img.size() == 0); + + { + uint8_t *w = new_img.ptrw(); + const uint8_t *r = data.ptr(); + + memcpy(w, &r[ofs], new_size); + } + + width = MAX(width / 2, 1); + height = MAX(height / 2, 1); + data = new_img; + + } else { + Vector<uint8_t> new_img; + + ERR_FAIL_COND(!_can_modify(format)); + int ps = get_format_pixel_size(format); + new_img.resize((width / 2) * (height / 2) * ps); + ERR_FAIL_COND(new_img.size() == 0); + ERR_FAIL_COND(data.size() == 0); + + { + uint8_t *w = new_img.ptrw(); + const uint8_t *r = data.ptr(); + + switch (format) { + case FORMAT_L8: + case FORMAT_R8: + _generate_po2_mipmap<uint8_t, 1, false, Image::average_4_uint8, Image::renormalize_uint8>(r, w, width, height); + break; + case FORMAT_LA8: + _generate_po2_mipmap<uint8_t, 2, false, Image::average_4_uint8, Image::renormalize_uint8>(r, w, width, height); + break; + case FORMAT_RG8: + _generate_po2_mipmap<uint8_t, 2, false, Image::average_4_uint8, Image::renormalize_uint8>(r, w, width, height); + break; + case FORMAT_RGB8: + _generate_po2_mipmap<uint8_t, 3, false, Image::average_4_uint8, Image::renormalize_uint8>(r, w, width, height); + break; + case FORMAT_RGBA8: + _generate_po2_mipmap<uint8_t, 4, false, Image::average_4_uint8, Image::renormalize_uint8>(r, w, width, height); + break; + + case FORMAT_RF: + _generate_po2_mipmap<float, 1, false, Image::average_4_float, Image::renormalize_float>(reinterpret_cast<const float *>(r), reinterpret_cast<float *>(w), width, height); + break; + case FORMAT_RGF: + _generate_po2_mipmap<float, 2, false, Image::average_4_float, Image::renormalize_float>(reinterpret_cast<const float *>(r), reinterpret_cast<float *>(w), width, height); + break; + case FORMAT_RGBF: + _generate_po2_mipmap<float, 3, false, Image::average_4_float, Image::renormalize_float>(reinterpret_cast<const float *>(r), reinterpret_cast<float *>(w), width, height); + break; + case FORMAT_RGBAF: + _generate_po2_mipmap<float, 4, false, Image::average_4_float, Image::renormalize_float>(reinterpret_cast<const float *>(r), reinterpret_cast<float *>(w), width, height); + break; + + case FORMAT_RH: + _generate_po2_mipmap<uint16_t, 1, false, Image::average_4_half, Image::renormalize_half>(reinterpret_cast<const uint16_t *>(r), reinterpret_cast<uint16_t *>(w), width, height); + break; + case FORMAT_RGH: + _generate_po2_mipmap<uint16_t, 2, false, Image::average_4_half, Image::renormalize_half>(reinterpret_cast<const uint16_t *>(r), reinterpret_cast<uint16_t *>(w), width, height); + break; + case FORMAT_RGBH: + _generate_po2_mipmap<uint16_t, 3, false, Image::average_4_half, Image::renormalize_half>(reinterpret_cast<const uint16_t *>(r), reinterpret_cast<uint16_t *>(w), width, height); + break; + case FORMAT_RGBAH: + _generate_po2_mipmap<uint16_t, 4, false, Image::average_4_half, Image::renormalize_half>(reinterpret_cast<const uint16_t *>(r), reinterpret_cast<uint16_t *>(w), width, height); + break; + + case FORMAT_RGBE9995: + _generate_po2_mipmap<uint32_t, 1, false, Image::average_4_rgbe9995, Image::renormalize_rgbe9995>(reinterpret_cast<const uint32_t *>(r), reinterpret_cast<uint32_t *>(w), width, height); + break; + default: { + } + } + } + + width /= 2; + height /= 2; + data = new_img; + } +} + +void Image::normalize() { + bool used_mipmaps = has_mipmaps(); + if (used_mipmaps) { + clear_mipmaps(); + } + + for (int y = 0; y < height; y++) { + for (int x = 0; x < width; x++) { + Color c = get_pixel(x, y); + Vector3 v(c.r * 2.0 - 1.0, c.g * 2.0 - 1.0, c.b * 2.0 - 1.0); + v.normalize(); + c.r = v.x * 0.5 + 0.5; + c.g = v.y * 0.5 + 0.5; + c.b = v.z * 0.5 + 0.5; + set_pixel(x, y, c); + } + } + + if (used_mipmaps) { + generate_mipmaps(true); + } +} + +Error Image::generate_mipmaps(bool p_renormalize) { + ERR_FAIL_COND_V_MSG(!_can_modify(format), ERR_UNAVAILABLE, "Cannot generate mipmaps in compressed or custom image formats."); + + ERR_FAIL_COND_V_MSG(format == FORMAT_RGBA4444, ERR_UNAVAILABLE, "Cannot generate mipmaps from RGBA4444 format."); + + ERR_FAIL_COND_V_MSG(width == 0 || height == 0, ERR_UNCONFIGURED, "Cannot generate mipmaps with width or height equal to 0."); + + int mmcount; + + int size = _get_dst_image_size(width, height, format, mmcount); + + data.resize(size); + + uint8_t *wp = data.ptrw(); + + int prev_ofs = 0; + int prev_h = height; + int prev_w = width; + + for (int i = 1; i <= mmcount; i++) { + int ofs, w, h; + _get_mipmap_offset_and_size(i, ofs, w, h); + + switch (format) { + case FORMAT_L8: + case FORMAT_R8: + _generate_po2_mipmap<uint8_t, 1, false, Image::average_4_uint8, Image::renormalize_uint8>(&wp[prev_ofs], &wp[ofs], prev_w, prev_h); + break; + case FORMAT_LA8: + case FORMAT_RG8: + _generate_po2_mipmap<uint8_t, 2, false, Image::average_4_uint8, Image::renormalize_uint8>(&wp[prev_ofs], &wp[ofs], prev_w, prev_h); + break; + case FORMAT_RGB8: + if (p_renormalize) { + _generate_po2_mipmap<uint8_t, 3, true, Image::average_4_uint8, Image::renormalize_uint8>(&wp[prev_ofs], &wp[ofs], prev_w, prev_h); + } else { + _generate_po2_mipmap<uint8_t, 3, false, Image::average_4_uint8, Image::renormalize_uint8>(&wp[prev_ofs], &wp[ofs], prev_w, prev_h); + } + + break; + case FORMAT_RGBA8: + if (p_renormalize) { + _generate_po2_mipmap<uint8_t, 4, true, Image::average_4_uint8, Image::renormalize_uint8>(&wp[prev_ofs], &wp[ofs], prev_w, prev_h); + } else { + _generate_po2_mipmap<uint8_t, 4, false, Image::average_4_uint8, Image::renormalize_uint8>(&wp[prev_ofs], &wp[ofs], prev_w, prev_h); + } + break; + case FORMAT_RF: + _generate_po2_mipmap<float, 1, false, Image::average_4_float, Image::renormalize_float>(reinterpret_cast<const float *>(&wp[prev_ofs]), reinterpret_cast<float *>(&wp[ofs]), prev_w, prev_h); + break; + case FORMAT_RGF: + _generate_po2_mipmap<float, 2, false, Image::average_4_float, Image::renormalize_float>(reinterpret_cast<const float *>(&wp[prev_ofs]), reinterpret_cast<float *>(&wp[ofs]), prev_w, prev_h); + break; + case FORMAT_RGBF: + if (p_renormalize) { + _generate_po2_mipmap<float, 3, true, Image::average_4_float, Image::renormalize_float>(reinterpret_cast<const float *>(&wp[prev_ofs]), reinterpret_cast<float *>(&wp[ofs]), prev_w, prev_h); + } else { + _generate_po2_mipmap<float, 3, false, Image::average_4_float, Image::renormalize_float>(reinterpret_cast<const float *>(&wp[prev_ofs]), reinterpret_cast<float *>(&wp[ofs]), prev_w, prev_h); + } + + break; + case FORMAT_RGBAF: + if (p_renormalize) { + _generate_po2_mipmap<float, 4, true, Image::average_4_float, Image::renormalize_float>(reinterpret_cast<const float *>(&wp[prev_ofs]), reinterpret_cast<float *>(&wp[ofs]), prev_w, prev_h); + } else { + _generate_po2_mipmap<float, 4, false, Image::average_4_float, Image::renormalize_float>(reinterpret_cast<const float *>(&wp[prev_ofs]), reinterpret_cast<float *>(&wp[ofs]), prev_w, prev_h); + } + + break; + case FORMAT_RH: + _generate_po2_mipmap<uint16_t, 1, false, Image::average_4_half, Image::renormalize_half>(reinterpret_cast<const uint16_t *>(&wp[prev_ofs]), reinterpret_cast<uint16_t *>(&wp[ofs]), prev_w, prev_h); + break; + case FORMAT_RGH: + _generate_po2_mipmap<uint16_t, 2, false, Image::average_4_half, Image::renormalize_half>(reinterpret_cast<const uint16_t *>(&wp[prev_ofs]), reinterpret_cast<uint16_t *>(&wp[ofs]), prev_w, prev_h); + break; + case FORMAT_RGBH: + if (p_renormalize) { + _generate_po2_mipmap<uint16_t, 3, true, Image::average_4_half, Image::renormalize_half>(reinterpret_cast<const uint16_t *>(&wp[prev_ofs]), reinterpret_cast<uint16_t *>(&wp[ofs]), prev_w, prev_h); + } else { + _generate_po2_mipmap<uint16_t, 3, false, Image::average_4_half, Image::renormalize_half>(reinterpret_cast<const uint16_t *>(&wp[prev_ofs]), reinterpret_cast<uint16_t *>(&wp[ofs]), prev_w, prev_h); + } + + break; + case FORMAT_RGBAH: + if (p_renormalize) { + _generate_po2_mipmap<uint16_t, 4, true, Image::average_4_half, Image::renormalize_half>(reinterpret_cast<const uint16_t *>(&wp[prev_ofs]), reinterpret_cast<uint16_t *>(&wp[ofs]), prev_w, prev_h); + } else { + _generate_po2_mipmap<uint16_t, 4, false, Image::average_4_half, Image::renormalize_half>(reinterpret_cast<const uint16_t *>(&wp[prev_ofs]), reinterpret_cast<uint16_t *>(&wp[ofs]), prev_w, prev_h); + } + + break; + case FORMAT_RGBE9995: + if (p_renormalize) { + _generate_po2_mipmap<uint32_t, 1, true, Image::average_4_rgbe9995, Image::renormalize_rgbe9995>(reinterpret_cast<const uint32_t *>(&wp[prev_ofs]), reinterpret_cast<uint32_t *>(&wp[ofs]), prev_w, prev_h); + } else { + _generate_po2_mipmap<uint32_t, 1, false, Image::average_4_rgbe9995, Image::renormalize_rgbe9995>(reinterpret_cast<const uint32_t *>(&wp[prev_ofs]), reinterpret_cast<uint32_t *>(&wp[ofs]), prev_w, prev_h); + } + + break; + default: { + } + } + + prev_ofs = ofs; + prev_w = w; + prev_h = h; + } + + mipmaps = true; + + return OK; +} + +Error Image::generate_mipmap_roughness(RoughnessChannel p_roughness_channel, const Ref<Image> &p_normal_map) { + Vector<double> normal_sat_vec; //summed area table + double *normal_sat = nullptr; //summed area table for normal map + int normal_w = 0, normal_h = 0; + + ERR_FAIL_COND_V_MSG(p_normal_map.is_null() || p_normal_map->is_empty(), ERR_INVALID_PARAMETER, "Must provide a valid normal map for roughness mipmaps"); + + Ref<Image> nm = p_normal_map->duplicate(); + if (nm->is_compressed()) { + nm->decompress(); + } + + normal_w = nm->get_width(); + normal_h = nm->get_height(); + + normal_sat_vec.resize(normal_w * normal_h * 3); + + normal_sat = normal_sat_vec.ptrw(); + + //create summed area table + + for (int y = 0; y < normal_h; y++) { + double line_sum[3] = { 0, 0, 0 }; + for (int x = 0; x < normal_w; x++) { + double normal[3]; + Color color = nm->get_pixel(x, y); + normal[0] = color.r * 2.0 - 1.0; + normal[1] = color.g * 2.0 - 1.0; + normal[2] = Math::sqrt(MAX(0.0, 1.0 - (normal[0] * normal[0] + normal[1] * normal[1]))); //reconstruct if missing + + line_sum[0] += normal[0]; + line_sum[1] += normal[1]; + line_sum[2] += normal[2]; + + uint32_t ofs = (y * normal_w + x) * 3; + + normal_sat[ofs + 0] = line_sum[0]; + normal_sat[ofs + 1] = line_sum[1]; + normal_sat[ofs + 2] = line_sum[2]; + + if (y > 0) { + uint32_t prev_ofs = ((y - 1) * normal_w + x) * 3; + normal_sat[ofs + 0] += normal_sat[prev_ofs + 0]; + normal_sat[ofs + 1] += normal_sat[prev_ofs + 1]; + normal_sat[ofs + 2] += normal_sat[prev_ofs + 2]; + } + } + } + +#if 0 + { + Vector3 beg(normal_sat_vec[0], normal_sat_vec[1], normal_sat_vec[2]); + Vector3 end(normal_sat_vec[normal_sat_vec.size() - 3], normal_sat_vec[normal_sat_vec.size() - 2], normal_sat_vec[normal_sat_vec.size() - 1]); + Vector3 avg = (end - beg) / (normal_w * normal_h); + print_line("average: " + avg); + } +#endif + + int mmcount; + + _get_dst_image_size(width, height, format, mmcount); + + uint8_t *base_ptr = data.ptrw(); + + for (int i = 1; i <= mmcount; i++) { + int ofs, w, h; + _get_mipmap_offset_and_size(i, ofs, w, h); + uint8_t *ptr = &base_ptr[ofs]; + + for (int x = 0; x < w; x++) { + for (int y = 0; y < h; y++) { + int from_x = x * normal_w / w; + int from_y = y * normal_h / h; + int to_x = (x + 1) * normal_w / w; + int to_y = (y + 1) * normal_h / h; + to_x = MIN(to_x - 1, normal_w); + to_y = MIN(to_y - 1, normal_h); + + int size_x = (to_x - from_x) + 1; + int size_y = (to_y - from_y) + 1; + + //summed area table version (much faster) + + double avg[3] = { 0, 0, 0 }; + + if (from_x > 0 && from_y > 0) { + uint32_t tofs = ((from_y - 1) * normal_w + (from_x - 1)) * 3; + avg[0] += normal_sat[tofs + 0]; + avg[1] += normal_sat[tofs + 1]; + avg[2] += normal_sat[tofs + 2]; + } + + if (from_y > 0) { + uint32_t tofs = ((from_y - 1) * normal_w + to_x) * 3; + avg[0] -= normal_sat[tofs + 0]; + avg[1] -= normal_sat[tofs + 1]; + avg[2] -= normal_sat[tofs + 2]; + } + + if (from_x > 0) { + uint32_t tofs = (to_y * normal_w + (from_x - 1)) * 3; + avg[0] -= normal_sat[tofs + 0]; + avg[1] -= normal_sat[tofs + 1]; + avg[2] -= normal_sat[tofs + 2]; + } + + uint32_t tofs = (to_y * normal_w + to_x) * 3; + avg[0] += normal_sat[tofs + 0]; + avg[1] += normal_sat[tofs + 1]; + avg[2] += normal_sat[tofs + 2]; + + double div = double(size_x * size_y); + Vector3 vec(avg[0] / div, avg[1] / div, avg[2] / div); + + float r = vec.length(); + + int pixel_ofs = y * w + x; + Color c = _get_color_at_ofs(ptr, pixel_ofs); + + float roughness = 0; + + switch (p_roughness_channel) { + case ROUGHNESS_CHANNEL_R: { + roughness = c.r; + } break; + case ROUGHNESS_CHANNEL_G: { + roughness = c.g; + } break; + case ROUGHNESS_CHANNEL_B: { + roughness = c.b; + } break; + case ROUGHNESS_CHANNEL_L: { + roughness = c.get_v(); + } break; + case ROUGHNESS_CHANNEL_A: { + roughness = c.a; + } break; + } + + float variance = 0; + if (r < 1.0f) { + float r2 = r * r; + float kappa = (3.0f * r - r * r2) / (1.0f - r2); + variance = 0.25f / kappa; + } + + float threshold = 0.4; + roughness = Math::sqrt(roughness * roughness + MIN(3.0f * variance, threshold * threshold)); + + switch (p_roughness_channel) { + case ROUGHNESS_CHANNEL_R: { + c.r = roughness; + } break; + case ROUGHNESS_CHANNEL_G: { + c.g = roughness; + } break; + case ROUGHNESS_CHANNEL_B: { + c.b = roughness; + } break; + case ROUGHNESS_CHANNEL_L: { + c.r = roughness; + c.g = roughness; + c.b = roughness; + } break; + case ROUGHNESS_CHANNEL_A: { + c.a = roughness; + } break; + } + + _set_color_at_ofs(ptr, pixel_ofs, c); + } + } +#if 0 + { + int size = get_mipmap_byte_size(i); + print_line("size for mimpap " + itos(i) + ": " + itos(size)); + Vector<uint8_t> imgdata; + imgdata.resize(size); + + + uint8_t* wr = imgdata.ptrw(); + memcpy(wr.ptr(), ptr, size); + wr = uint8_t*(); + Ref<Image> im; + im.instantiate(); + im->create(w, h, false, format, imgdata); + im->save_png("res://mipmap_" + itos(i) + ".png"); + } +#endif + } + + return OK; +} + +void Image::clear_mipmaps() { + if (!mipmaps) { + return; + } + + if (is_empty()) { + return; + } + + int ofs, w, h; + _get_mipmap_offset_and_size(1, ofs, w, h); + data.resize(ofs); + + mipmaps = false; +} + +bool Image::is_empty() const { + return (data.size() == 0); +} + +Vector<uint8_t> Image::get_data() const { + return data; +} + +void Image::create(int p_width, int p_height, bool p_use_mipmaps, Format p_format) { + ERR_FAIL_COND_MSG(p_width <= 0, "Image width must be greater than 0."); + ERR_FAIL_COND_MSG(p_height <= 0, "Image height must be greater than 0."); + ERR_FAIL_COND_MSG(p_width > MAX_WIDTH, "Image width cannot be greater than " + itos(MAX_WIDTH) + "."); + ERR_FAIL_COND_MSG(p_height > MAX_HEIGHT, "Image height cannot be greater than " + itos(MAX_HEIGHT) + "."); + ERR_FAIL_COND_MSG(p_width * p_height > MAX_PIXELS, "Too many pixels for image, maximum is " + itos(MAX_PIXELS)); + ERR_FAIL_INDEX_MSG(p_format, FORMAT_MAX, "Image format out of range, please see Image's Format enum."); + + int mm = 0; + int size = _get_dst_image_size(p_width, p_height, p_format, mm, p_use_mipmaps ? -1 : 0); + data.resize(size); + + { + uint8_t *w = data.ptrw(); + memset(w, 0, size); + } + + width = p_width; + height = p_height; + mipmaps = p_use_mipmaps; + format = p_format; +} + +void Image::create(int p_width, int p_height, bool p_use_mipmaps, Format p_format, const Vector<uint8_t> &p_data) { + ERR_FAIL_COND_MSG(p_width <= 0, "Image width must be greater than 0."); + ERR_FAIL_COND_MSG(p_height <= 0, "Image height must be greater than 0."); + ERR_FAIL_COND_MSG(p_width > MAX_WIDTH, "Image width cannot be greater than " + itos(MAX_WIDTH) + "."); + ERR_FAIL_COND_MSG(p_height > MAX_HEIGHT, "Image height cannot be greater than " + itos(MAX_HEIGHT) + "."); + ERR_FAIL_COND_MSG(p_width * p_height > MAX_PIXELS, "Too many pixels for image, maximum is " + itos(MAX_PIXELS)); + ERR_FAIL_INDEX_MSG(p_format, FORMAT_MAX, "Image format out of range, please see Image's Format enum."); + + int mm; + int size = _get_dst_image_size(p_width, p_height, p_format, mm, p_use_mipmaps ? -1 : 0); + + ERR_FAIL_COND_MSG(p_data.size() != size, "Expected data size of " + itos(size) + " bytes in Image::create(), got instead " + itos(p_data.size()) + " bytes."); + + height = p_height; + width = p_width; + format = p_format; + data = p_data; + + mipmaps = p_use_mipmaps; +} + +void Image::create(const char **p_xpm) { + int size_width = 0; + int size_height = 0; + int pixelchars = 0; + mipmaps = false; + bool has_alpha = false; + + enum Status { + READING_HEADER, + READING_COLORS, + READING_PIXELS, + DONE + }; + + Status status = READING_HEADER; + int line = 0; + + HashMap<String, Color> colormap; + int colormap_size = 0; + uint32_t pixel_size = 0; + uint8_t *data_write = nullptr; + + while (status != DONE) { + const char *line_ptr = p_xpm[line]; + + switch (status) { + case READING_HEADER: { + String line_str = line_ptr; + line_str.replace("\t", " "); + + size_width = line_str.get_slicec(' ', 0).to_int(); + size_height = line_str.get_slicec(' ', 1).to_int(); + colormap_size = line_str.get_slicec(' ', 2).to_int(); + pixelchars = line_str.get_slicec(' ', 3).to_int(); + ERR_FAIL_COND(colormap_size > 32766); + ERR_FAIL_COND(pixelchars > 5); + ERR_FAIL_COND(size_width > 32767); + ERR_FAIL_COND(size_height > 32767); + status = READING_COLORS; + } break; + case READING_COLORS: { + String colorstring; + for (int i = 0; i < pixelchars; i++) { + colorstring += *line_ptr; + line_ptr++; + } + //skip spaces + while (*line_ptr == ' ' || *line_ptr == '\t' || *line_ptr == 0) { + if (*line_ptr == 0) { + break; + } + line_ptr++; + } + if (*line_ptr == 'c') { + line_ptr++; + while (*line_ptr == ' ' || *line_ptr == '\t' || *line_ptr == 0) { + if (*line_ptr == 0) { + break; + } + line_ptr++; + } + + if (*line_ptr == '#') { + line_ptr++; + uint8_t col_r = 0; + uint8_t col_g = 0; + uint8_t col_b = 0; + //uint8_t col_a=255; + + for (int i = 0; i < 6; i++) { + char v = line_ptr[i]; + + if (v >= '0' && v <= '9') { + v -= '0'; + } else if (v >= 'A' && v <= 'F') { + v = (v - 'A') + 10; + } else if (v >= 'a' && v <= 'f') { + v = (v - 'a') + 10; + } else { + break; + } + + switch (i) { + case 0: + col_r = v << 4; + break; + case 1: + col_r |= v; + break; + case 2: + col_g = v << 4; + break; + case 3: + col_g |= v; + break; + case 4: + col_b = v << 4; + break; + case 5: + col_b |= v; + break; + } + } + + // magenta mask + if (col_r == 255 && col_g == 0 && col_b == 255) { + colormap[colorstring] = Color(0, 0, 0, 0); + has_alpha = true; + } else { + colormap[colorstring] = Color(col_r / 255.0, col_g / 255.0, col_b / 255.0, 1.0); + } + } + } + if (line == colormap_size) { + status = READING_PIXELS; + create(size_width, size_height, false, has_alpha ? FORMAT_RGBA8 : FORMAT_RGB8); + data_write = data.ptrw(); + pixel_size = has_alpha ? 4 : 3; + } + } break; + case READING_PIXELS: { + int y = line - colormap_size - 1; + for (int x = 0; x < size_width; x++) { + char pixelstr[6] = { 0, 0, 0, 0, 0, 0 }; + for (int i = 0; i < pixelchars; i++) { + pixelstr[i] = line_ptr[x * pixelchars + i]; + } + + Color *colorptr = colormap.getptr(pixelstr); + ERR_FAIL_COND(!colorptr); + uint8_t pixel[4]; + for (uint32_t i = 0; i < pixel_size; i++) { + pixel[i] = CLAMP((*colorptr)[i] * 255, 0, 255); + } + _put_pixelb(x, y, pixel_size, data_write, pixel); + } + + if (y == (size_height - 1)) { + status = DONE; + } + } break; + default: { + } + } + + line++; + } +} +#define DETECT_ALPHA_MAX_THRESHOLD 254 +#define DETECT_ALPHA_MIN_THRESHOLD 2 + +#define DETECT_ALPHA(m_value) \ + { \ + uint8_t value = m_value; \ + if (value < DETECT_ALPHA_MIN_THRESHOLD) \ + bit = true; \ + else if (value < DETECT_ALPHA_MAX_THRESHOLD) { \ + detected = true; \ + break; \ + } \ + } + +#define DETECT_NON_ALPHA(m_value) \ + { \ + uint8_t value = m_value; \ + if (value > 0) { \ + detected = true; \ + break; \ + } \ + } + +bool Image::is_invisible() const { + if (format == FORMAT_L8 || + format == FORMAT_RGB8 || format == FORMAT_RG8) { + return false; + } + + int len = data.size(); + + if (len == 0) { + return true; + } + + int w, h; + _get_mipmap_offset_and_size(1, len, w, h); + + const uint8_t *r = data.ptr(); + const unsigned char *data_ptr = r; + + bool detected = false; + + switch (format) { + case FORMAT_LA8: { + for (int i = 0; i < (len >> 1); i++) { + DETECT_NON_ALPHA(data_ptr[(i << 1) + 1]); + } + + } break; + case FORMAT_RGBA8: { + for (int i = 0; i < (len >> 2); i++) { + DETECT_NON_ALPHA(data_ptr[(i << 2) + 3]) + } + + } break; + + case FORMAT_PVRTC1_2A: + case FORMAT_PVRTC1_4A: + case FORMAT_DXT3: + case FORMAT_DXT5: { + detected = true; + } break; + default: { + } + } + + return !detected; +} + +Image::AlphaMode Image::detect_alpha() const { + int len = data.size(); + + if (len == 0) { + return ALPHA_NONE; + } + + int w, h; + _get_mipmap_offset_and_size(1, len, w, h); + + const uint8_t *r = data.ptr(); + const unsigned char *data_ptr = r; + + bool bit = false; + bool detected = false; + + switch (format) { + case FORMAT_LA8: { + for (int i = 0; i < (len >> 1); i++) { + DETECT_ALPHA(data_ptr[(i << 1) + 1]); + } + + } break; + case FORMAT_RGBA8: { + for (int i = 0; i < (len >> 2); i++) { + DETECT_ALPHA(data_ptr[(i << 2) + 3]) + } + + } break; + case FORMAT_PVRTC1_2A: + case FORMAT_PVRTC1_4A: + case FORMAT_DXT3: + case FORMAT_DXT5: { + detected = true; + } break; + default: { + } + } + + if (detected) { + return ALPHA_BLEND; + } else if (bit) { + return ALPHA_BIT; + } else { + return ALPHA_NONE; + } +} + +Error Image::load(const String &p_path) { +#ifdef DEBUG_ENABLED + if (p_path.begins_with("res://") && ResourceLoader::exists(p_path)) { + WARN_PRINT("Loaded resource as image file, this will not work on export: '" + p_path + "'. Instead, import the image file as an Image resource and load it normally as a resource."); + } +#endif + return ImageLoader::load_image(p_path, this); +} + +Error Image::save_png(const String &p_path) const { + if (save_png_func == nullptr) { + return ERR_UNAVAILABLE; + } + + return save_png_func(p_path, Ref<Image>((Image *)this)); +} + +Vector<uint8_t> Image::save_png_to_buffer() const { + if (save_png_buffer_func == nullptr) { + return Vector<uint8_t>(); + } + + return save_png_buffer_func(Ref<Image>((Image *)this)); +} + +Error Image::save_exr(const String &p_path, bool p_grayscale) const { + if (save_exr_func == nullptr) { + return ERR_UNAVAILABLE; + } + + return save_exr_func(p_path, Ref<Image>((Image *)this), p_grayscale); +} + +int Image::get_image_data_size(int p_width, int p_height, Format p_format, bool p_mipmaps) { + int mm; + return _get_dst_image_size(p_width, p_height, p_format, mm, p_mipmaps ? -1 : 0); +} + +int Image::get_image_required_mipmaps(int p_width, int p_height, Format p_format) { + int mm; + _get_dst_image_size(p_width, p_height, p_format, mm, -1); + return mm; +} + +Size2i Image::get_image_mipmap_size(int p_width, int p_height, Format p_format, int p_mipmap) { + int mm; + Size2i ret; + _get_dst_image_size(p_width, p_height, p_format, mm, p_mipmap, &ret.x, &ret.y); + return ret; +} + +int Image::get_image_mipmap_offset(int p_width, int p_height, Format p_format, int p_mipmap) { + if (p_mipmap <= 0) { + return 0; + } + int mm; + return _get_dst_image_size(p_width, p_height, p_format, mm, p_mipmap - 1); +} + +int Image::get_image_mipmap_offset_and_dimensions(int p_width, int p_height, Format p_format, int p_mipmap, int &r_w, int &r_h) { + if (p_mipmap <= 0) { + r_w = p_width; + r_h = p_height; + return 0; + } + int mm; + return _get_dst_image_size(p_width, p_height, p_format, mm, p_mipmap - 1, &r_w, &r_h); +} + +bool Image::is_compressed() const { + return format > FORMAT_RGBE9995; +} + +Error Image::decompress() { + if (((format >= FORMAT_DXT1 && format <= FORMAT_RGTC_RG) || (format == FORMAT_DXT5_RA_AS_RG)) && _image_decompress_bc) { + _image_decompress_bc(this); + } else if (format >= FORMAT_BPTC_RGBA && format <= FORMAT_BPTC_RGBFU && _image_decompress_bptc) { + _image_decompress_bptc(this); + } else if (format >= FORMAT_PVRTC1_2 && format <= FORMAT_PVRTC1_4A && _image_decompress_pvrtc) { + _image_decompress_pvrtc(this); + } else if (format == FORMAT_ETC && _image_decompress_etc1) { + _image_decompress_etc1(this); + } else if (format >= FORMAT_ETC2_R11 && format <= FORMAT_ETC2_RA_AS_RG && _image_decompress_etc2) { + _image_decompress_etc2(this); + } else { + return ERR_UNAVAILABLE; + } + return OK; +} + +Error Image::compress(CompressMode p_mode, CompressSource p_source, float p_lossy_quality) { + ERR_FAIL_INDEX_V_MSG(p_mode, COMPRESS_MAX, ERR_INVALID_PARAMETER, "Invalid compress mode."); + ERR_FAIL_INDEX_V_MSG(p_source, COMPRESS_SOURCE_MAX, ERR_INVALID_PARAMETER, "Invalid compress source."); + return compress_from_channels(p_mode, detect_used_channels(p_source), p_lossy_quality); +} + +Error Image::compress_from_channels(CompressMode p_mode, UsedChannels p_channels, float p_lossy_quality) { + switch (p_mode) { + case COMPRESS_S3TC: { + ERR_FAIL_COND_V(!_image_compress_bc_func, ERR_UNAVAILABLE); + _image_compress_bc_func(this, p_lossy_quality, p_channels); + } break; + case COMPRESS_PVRTC1_4: { + ERR_FAIL_COND_V(!_image_compress_pvrtc1_4bpp_func, ERR_UNAVAILABLE); + _image_compress_pvrtc1_4bpp_func(this); + } break; + case COMPRESS_ETC: { + ERR_FAIL_COND_V(!_image_compress_etc1_func, ERR_UNAVAILABLE); + _image_compress_etc1_func(this, p_lossy_quality); + } break; + case COMPRESS_ETC2: { + ERR_FAIL_COND_V(!_image_compress_etc2_func, ERR_UNAVAILABLE); + _image_compress_etc2_func(this, p_lossy_quality, p_channels); + } break; + case COMPRESS_BPTC: { + ERR_FAIL_COND_V(!_image_compress_bptc_func, ERR_UNAVAILABLE); + _image_compress_bptc_func(this, p_lossy_quality, p_channels); + } break; + case COMPRESS_MAX: { + ERR_FAIL_V(ERR_INVALID_PARAMETER); + } break; + } + + return OK; +} + +Image::Image(const char **p_xpm) { + width = 0; + height = 0; + mipmaps = false; + format = FORMAT_L8; + + create(p_xpm); +} + +Image::Image(int p_width, int p_height, bool p_use_mipmaps, Format p_format) { + width = 0; + height = 0; + mipmaps = p_use_mipmaps; + format = FORMAT_L8; + + create(p_width, p_height, p_use_mipmaps, p_format); +} + +Image::Image(int p_width, int p_height, bool p_mipmaps, Format p_format, const Vector<uint8_t> &p_data) { + width = 0; + height = 0; + mipmaps = p_mipmaps; + format = FORMAT_L8; + + create(p_width, p_height, p_mipmaps, p_format, p_data); +} + +Rect2 Image::get_used_rect() const { + if (format != FORMAT_LA8 && format != FORMAT_RGBA8 && format != FORMAT_RGBAF && format != FORMAT_RGBAH && format != FORMAT_RGBA4444 && format != FORMAT_RGB565) { + return Rect2(Point2(), Size2(width, height)); + } + + int len = data.size(); + + if (len == 0) { + return Rect2(); + } + + int minx = 0xFFFFFF, miny = 0xFFFFFFF; + int maxx = -1, maxy = -1; + for (int j = 0; j < height; j++) { + for (int i = 0; i < width; i++) { + if (!(get_pixel(i, j).a > 0)) { + continue; + } + if (i > maxx) { + maxx = i; + } + if (j > maxy) { + maxy = j; + } + if (i < minx) { + minx = i; + } + if (j < miny) { + miny = j; + } + } + } + + if (maxx == -1) { + return Rect2(); + } else { + return Rect2(minx, miny, maxx - minx + 1, maxy - miny + 1); + } +} + +Ref<Image> Image::get_rect(const Rect2 &p_area) const { + Ref<Image> img = memnew(Image(p_area.size.x, p_area.size.y, mipmaps, format)); + img->blit_rect(Ref<Image>((Image *)this), p_area, Point2(0, 0)); + return img; +} + +void Image::blit_rect(const Ref<Image> &p_src, const Rect2 &p_src_rect, const Point2 &p_dest) { + ERR_FAIL_COND_MSG(p_src.is_null(), "It's not a reference to a valid Image object."); + int dsize = data.size(); + int srcdsize = p_src->data.size(); + ERR_FAIL_COND(dsize == 0); + ERR_FAIL_COND(srcdsize == 0); + ERR_FAIL_COND(format != p_src->format); + ERR_FAIL_COND_MSG(!_can_modify(format), "Cannot blit_rect in compressed or custom image formats."); + + Rect2i clipped_src_rect = Rect2i(0, 0, p_src->width, p_src->height).intersection(p_src_rect); + + if (p_dest.x < 0) { + clipped_src_rect.position.x = ABS(p_dest.x); + } + if (p_dest.y < 0) { + clipped_src_rect.position.y = ABS(p_dest.y); + } + + if (clipped_src_rect.size.x <= 0 || clipped_src_rect.size.y <= 0) { + return; + } + + Point2 src_underscan = Point2(MIN(0, p_src_rect.position.x), MIN(0, p_src_rect.position.y)); + Rect2i dest_rect = Rect2i(0, 0, width, height).intersection(Rect2i(p_dest - src_underscan, clipped_src_rect.size)); + + uint8_t *wp = data.ptrw(); + uint8_t *dst_data_ptr = wp; + + const uint8_t *rp = p_src->data.ptr(); + const uint8_t *src_data_ptr = rp; + + int pixel_size = get_format_pixel_size(format); + + for (int i = 0; i < dest_rect.size.y; i++) { + for (int j = 0; j < dest_rect.size.x; j++) { + int src_x = clipped_src_rect.position.x + j; + int src_y = clipped_src_rect.position.y + i; + + int dst_x = dest_rect.position.x + j; + int dst_y = dest_rect.position.y + i; + + const uint8_t *src = &src_data_ptr[(src_y * p_src->width + src_x) * pixel_size]; + uint8_t *dst = &dst_data_ptr[(dst_y * width + dst_x) * pixel_size]; + + for (int k = 0; k < pixel_size; k++) { + dst[k] = src[k]; + } + } + } +} + +void Image::blit_rect_mask(const Ref<Image> &p_src, const Ref<Image> &p_mask, const Rect2 &p_src_rect, const Point2 &p_dest) { + ERR_FAIL_COND_MSG(p_src.is_null(), "It's not a reference to a valid Image object."); + ERR_FAIL_COND_MSG(p_mask.is_null(), "It's not a reference to a valid Image object."); + int dsize = data.size(); + int srcdsize = p_src->data.size(); + int maskdsize = p_mask->data.size(); + ERR_FAIL_COND(dsize == 0); + ERR_FAIL_COND(srcdsize == 0); + ERR_FAIL_COND(maskdsize == 0); + ERR_FAIL_COND_MSG(p_src->width != p_mask->width, "Source image width is different from mask width."); + ERR_FAIL_COND_MSG(p_src->height != p_mask->height, "Source image height is different from mask height."); + ERR_FAIL_COND(format != p_src->format); + + Rect2i clipped_src_rect = Rect2i(0, 0, p_src->width, p_src->height).intersection(p_src_rect); + + if (p_dest.x < 0) { + clipped_src_rect.position.x = ABS(p_dest.x); + } + if (p_dest.y < 0) { + clipped_src_rect.position.y = ABS(p_dest.y); + } + + if (clipped_src_rect.size.x <= 0 || clipped_src_rect.size.y <= 0) { + return; + } + + Point2 src_underscan = Point2(MIN(0, p_src_rect.position.x), MIN(0, p_src_rect.position.y)); + Rect2i dest_rect = Rect2i(0, 0, width, height).intersection(Rect2i(p_dest - src_underscan, clipped_src_rect.size)); + + uint8_t *wp = data.ptrw(); + uint8_t *dst_data_ptr = wp; + + const uint8_t *rp = p_src->data.ptr(); + const uint8_t *src_data_ptr = rp; + + int pixel_size = get_format_pixel_size(format); + + Ref<Image> msk = p_mask; + + for (int i = 0; i < dest_rect.size.y; i++) { + for (int j = 0; j < dest_rect.size.x; j++) { + int src_x = clipped_src_rect.position.x + j; + int src_y = clipped_src_rect.position.y + i; + + if (msk->get_pixel(src_x, src_y).a != 0) { + int dst_x = dest_rect.position.x + j; + int dst_y = dest_rect.position.y + i; + + const uint8_t *src = &src_data_ptr[(src_y * p_src->width + src_x) * pixel_size]; + uint8_t *dst = &dst_data_ptr[(dst_y * width + dst_x) * pixel_size]; + + for (int k = 0; k < pixel_size; k++) { + dst[k] = src[k]; + } + } + } + } +} + +void Image::blend_rect(const Ref<Image> &p_src, const Rect2 &p_src_rect, const Point2 &p_dest) { + ERR_FAIL_COND_MSG(p_src.is_null(), "It's not a reference to a valid Image object."); + int dsize = data.size(); + int srcdsize = p_src->data.size(); + ERR_FAIL_COND(dsize == 0); + ERR_FAIL_COND(srcdsize == 0); + ERR_FAIL_COND(format != p_src->format); + + Rect2i clipped_src_rect = Rect2i(0, 0, p_src->width, p_src->height).intersection(p_src_rect); + + if (p_dest.x < 0) { + clipped_src_rect.position.x = ABS(p_dest.x); + } + if (p_dest.y < 0) { + clipped_src_rect.position.y = ABS(p_dest.y); + } + + if (clipped_src_rect.size.x <= 0 || clipped_src_rect.size.y <= 0) { + return; + } + + Point2 src_underscan = Point2(MIN(0, p_src_rect.position.x), MIN(0, p_src_rect.position.y)); + Rect2i dest_rect = Rect2i(0, 0, width, height).intersection(Rect2i(p_dest - src_underscan, clipped_src_rect.size)); + + Ref<Image> img = p_src; + + for (int i = 0; i < dest_rect.size.y; i++) { + for (int j = 0; j < dest_rect.size.x; j++) { + int src_x = clipped_src_rect.position.x + j; + int src_y = clipped_src_rect.position.y + i; + + int dst_x = dest_rect.position.x + j; + int dst_y = dest_rect.position.y + i; + + Color sc = img->get_pixel(src_x, src_y); + if (sc.a != 0) { + Color dc = get_pixel(dst_x, dst_y); + dc = dc.blend(sc); + set_pixel(dst_x, dst_y, dc); + } + } + } +} + +void Image::blend_rect_mask(const Ref<Image> &p_src, const Ref<Image> &p_mask, const Rect2 &p_src_rect, const Point2 &p_dest) { + ERR_FAIL_COND_MSG(p_src.is_null(), "It's not a reference to a valid Image object."); + ERR_FAIL_COND_MSG(p_mask.is_null(), "It's not a reference to a valid Image object."); + int dsize = data.size(); + int srcdsize = p_src->data.size(); + int maskdsize = p_mask->data.size(); + ERR_FAIL_COND(dsize == 0); + ERR_FAIL_COND(srcdsize == 0); + ERR_FAIL_COND(maskdsize == 0); + ERR_FAIL_COND_MSG(p_src->width != p_mask->width, "Source image width is different from mask width."); + ERR_FAIL_COND_MSG(p_src->height != p_mask->height, "Source image height is different from mask height."); + ERR_FAIL_COND(format != p_src->format); + + Rect2i clipped_src_rect = Rect2i(0, 0, p_src->width, p_src->height).intersection(p_src_rect); + + if (p_dest.x < 0) { + clipped_src_rect.position.x = ABS(p_dest.x); + } + if (p_dest.y < 0) { + clipped_src_rect.position.y = ABS(p_dest.y); + } + + if (clipped_src_rect.size.x <= 0 || clipped_src_rect.size.y <= 0) { + return; + } + + Point2 src_underscan = Point2(MIN(0, p_src_rect.position.x), MIN(0, p_src_rect.position.y)); + Rect2i dest_rect = Rect2i(0, 0, width, height).intersection(Rect2i(p_dest - src_underscan, clipped_src_rect.size)); + + Ref<Image> img = p_src; + Ref<Image> msk = p_mask; + + for (int i = 0; i < dest_rect.size.y; i++) { + for (int j = 0; j < dest_rect.size.x; j++) { + int src_x = clipped_src_rect.position.x + j; + int src_y = clipped_src_rect.position.y + i; + + // If the mask's pixel is transparent then we skip it + //Color c = msk->get_pixel(src_x, src_y); + //if (c.a == 0) continue; + if (msk->get_pixel(src_x, src_y).a != 0) { + int dst_x = dest_rect.position.x + j; + int dst_y = dest_rect.position.y + i; + + Color sc = img->get_pixel(src_x, src_y); + if (sc.a != 0) { + Color dc = get_pixel(dst_x, dst_y); + dc = dc.blend(sc); + set_pixel(dst_x, dst_y, dc); + } + } + } + } +} + +void Image::fill(const Color &c) { + ERR_FAIL_COND_MSG(!_can_modify(format), "Cannot fill in compressed or custom image formats."); + + uint8_t *wp = data.ptrw(); + uint8_t *dst_data_ptr = wp; + + int pixel_size = get_format_pixel_size(format); + + // put first pixel with the format-aware API + set_pixel(0, 0, c); + + for (int y = 0; y < height; y++) { + for (int x = 0; x < width; x++) { + uint8_t *dst = &dst_data_ptr[(y * width + x) * pixel_size]; + + for (int k = 0; k < pixel_size; k++) { + dst[k] = dst_data_ptr[k]; + } + } + } +} + +ImageMemLoadFunc Image::_png_mem_loader_func = nullptr; +ImageMemLoadFunc Image::_jpg_mem_loader_func = nullptr; +ImageMemLoadFunc Image::_webp_mem_loader_func = nullptr; +ImageMemLoadFunc Image::_tga_mem_loader_func = nullptr; +ImageMemLoadFunc Image::_bmp_mem_loader_func = nullptr; + +void (*Image::_image_compress_bc_func)(Image *, float, Image::UsedChannels) = nullptr; +void (*Image::_image_compress_bptc_func)(Image *, float, Image::UsedChannels) = nullptr; +void (*Image::_image_compress_pvrtc1_4bpp_func)(Image *) = nullptr; +void (*Image::_image_compress_etc1_func)(Image *, float) = nullptr; +void (*Image::_image_compress_etc2_func)(Image *, float, Image::UsedChannels) = nullptr; +void (*Image::_image_decompress_pvrtc)(Image *) = nullptr; +void (*Image::_image_decompress_bc)(Image *) = nullptr; +void (*Image::_image_decompress_bptc)(Image *) = nullptr; +void (*Image::_image_decompress_etc1)(Image *) = nullptr; +void (*Image::_image_decompress_etc2)(Image *) = nullptr; + +Vector<uint8_t> (*Image::webp_lossy_packer)(const Ref<Image> &, float) = nullptr; +Vector<uint8_t> (*Image::webp_lossless_packer)(const Ref<Image> &) = nullptr; +Ref<Image> (*Image::webp_unpacker)(const Vector<uint8_t> &) = nullptr; +Vector<uint8_t> (*Image::png_packer)(const Ref<Image> &) = nullptr; +Ref<Image> (*Image::png_unpacker)(const Vector<uint8_t> &) = nullptr; +Vector<uint8_t> (*Image::basis_universal_packer)(const Ref<Image> &, Image::UsedChannels) = nullptr; +Ref<Image> (*Image::basis_universal_unpacker)(const Vector<uint8_t> &) = nullptr; + +void Image::_set_data(const Dictionary &p_data) { + ERR_FAIL_COND(!p_data.has("width")); + ERR_FAIL_COND(!p_data.has("height")); + ERR_FAIL_COND(!p_data.has("format")); + ERR_FAIL_COND(!p_data.has("mipmaps")); + ERR_FAIL_COND(!p_data.has("data")); + + int dwidth = p_data["width"]; + int dheight = p_data["height"]; + String dformat = p_data["format"]; + bool dmipmaps = p_data["mipmaps"]; + Vector<uint8_t> ddata = p_data["data"]; + Format ddformat = FORMAT_MAX; + for (int i = 0; i < FORMAT_MAX; i++) { + if (dformat == get_format_name(Format(i))) { + ddformat = Format(i); + break; + } + } + + ERR_FAIL_COND(ddformat == FORMAT_MAX); + + create(dwidth, dheight, dmipmaps, ddformat, ddata); +} + +Dictionary Image::_get_data() const { + Dictionary d; + d["width"] = width; + d["height"] = height; + d["format"] = get_format_name(format); + d["mipmaps"] = mipmaps; + d["data"] = data; + return d; +} + +Color Image::get_pixelv(const Point2i &p_point) const { + return get_pixel(p_point.x, p_point.y); +} + +Color Image::_get_color_at_ofs(const uint8_t *ptr, uint32_t ofs) const { + switch (format) { + case FORMAT_L8: { + float l = ptr[ofs] / 255.0; + return Color(l, l, l, 1); + } + case FORMAT_LA8: { + float l = ptr[ofs * 2 + 0] / 255.0; + float a = ptr[ofs * 2 + 1] / 255.0; + return Color(l, l, l, a); + } + case FORMAT_R8: { + float r = ptr[ofs] / 255.0; + return Color(r, 0, 0, 1); + } + case FORMAT_RG8: { + float r = ptr[ofs * 2 + 0] / 255.0; + float g = ptr[ofs * 2 + 1] / 255.0; + return Color(r, g, 0, 1); + } + case FORMAT_RGB8: { + float r = ptr[ofs * 3 + 0] / 255.0; + float g = ptr[ofs * 3 + 1] / 255.0; + float b = ptr[ofs * 3 + 2] / 255.0; + return Color(r, g, b, 1); + } + case FORMAT_RGBA8: { + float r = ptr[ofs * 4 + 0] / 255.0; + float g = ptr[ofs * 4 + 1] / 255.0; + float b = ptr[ofs * 4 + 2] / 255.0; + float a = ptr[ofs * 4 + 3] / 255.0; + return Color(r, g, b, a); + } + case FORMAT_RGBA4444: { + uint16_t u = ((uint16_t *)ptr)[ofs]; + float r = ((u >> 12) & 0xF) / 15.0; + float g = ((u >> 8) & 0xF) / 15.0; + float b = ((u >> 4) & 0xF) / 15.0; + float a = (u & 0xF) / 15.0; + return Color(r, g, b, a); + } + case FORMAT_RGB565: { + uint16_t u = ((uint16_t *)ptr)[ofs]; + float r = (u & 0x1F) / 31.0; + float g = ((u >> 5) & 0x3F) / 63.0; + float b = ((u >> 11) & 0x1F) / 31.0; + return Color(r, g, b, 1.0); + } + case FORMAT_RF: { + float r = ((float *)ptr)[ofs]; + return Color(r, 0, 0, 1); + } + case FORMAT_RGF: { + float r = ((float *)ptr)[ofs * 2 + 0]; + float g = ((float *)ptr)[ofs * 2 + 1]; + return Color(r, g, 0, 1); + } + case FORMAT_RGBF: { + float r = ((float *)ptr)[ofs * 3 + 0]; + float g = ((float *)ptr)[ofs * 3 + 1]; + float b = ((float *)ptr)[ofs * 3 + 2]; + return Color(r, g, b, 1); + } + case FORMAT_RGBAF: { + float r = ((float *)ptr)[ofs * 4 + 0]; + float g = ((float *)ptr)[ofs * 4 + 1]; + float b = ((float *)ptr)[ofs * 4 + 2]; + float a = ((float *)ptr)[ofs * 4 + 3]; + return Color(r, g, b, a); + } + case FORMAT_RH: { + uint16_t r = ((uint16_t *)ptr)[ofs]; + return Color(Math::half_to_float(r), 0, 0, 1); + } + case FORMAT_RGH: { + uint16_t r = ((uint16_t *)ptr)[ofs * 2 + 0]; + uint16_t g = ((uint16_t *)ptr)[ofs * 2 + 1]; + return Color(Math::half_to_float(r), Math::half_to_float(g), 0, 1); + } + case FORMAT_RGBH: { + uint16_t r = ((uint16_t *)ptr)[ofs * 3 + 0]; + uint16_t g = ((uint16_t *)ptr)[ofs * 3 + 1]; + uint16_t b = ((uint16_t *)ptr)[ofs * 3 + 2]; + return Color(Math::half_to_float(r), Math::half_to_float(g), Math::half_to_float(b), 1); + } + case FORMAT_RGBAH: { + uint16_t r = ((uint16_t *)ptr)[ofs * 4 + 0]; + uint16_t g = ((uint16_t *)ptr)[ofs * 4 + 1]; + uint16_t b = ((uint16_t *)ptr)[ofs * 4 + 2]; + uint16_t a = ((uint16_t *)ptr)[ofs * 4 + 3]; + return Color(Math::half_to_float(r), Math::half_to_float(g), Math::half_to_float(b), Math::half_to_float(a)); + } + case FORMAT_RGBE9995: { + return Color::from_rgbe9995(((uint32_t *)ptr)[ofs]); + } + default: { + ERR_FAIL_V_MSG(Color(), "Can't get_pixel() on compressed image, sorry."); + } + } +} + +void Image::_set_color_at_ofs(uint8_t *ptr, uint32_t ofs, const Color &p_color) { + switch (format) { + case FORMAT_L8: { + ptr[ofs] = uint8_t(CLAMP(p_color.get_v() * 255.0, 0, 255)); + } break; + case FORMAT_LA8: { + ptr[ofs * 2 + 0] = uint8_t(CLAMP(p_color.get_v() * 255.0, 0, 255)); + ptr[ofs * 2 + 1] = uint8_t(CLAMP(p_color.a * 255.0, 0, 255)); + } break; + case FORMAT_R8: { + ptr[ofs] = uint8_t(CLAMP(p_color.r * 255.0, 0, 255)); + } break; + case FORMAT_RG8: { + ptr[ofs * 2 + 0] = uint8_t(CLAMP(p_color.r * 255.0, 0, 255)); + ptr[ofs * 2 + 1] = uint8_t(CLAMP(p_color.g * 255.0, 0, 255)); + } break; + case FORMAT_RGB8: { + ptr[ofs * 3 + 0] = uint8_t(CLAMP(p_color.r * 255.0, 0, 255)); + ptr[ofs * 3 + 1] = uint8_t(CLAMP(p_color.g * 255.0, 0, 255)); + ptr[ofs * 3 + 2] = uint8_t(CLAMP(p_color.b * 255.0, 0, 255)); + } break; + case FORMAT_RGBA8: { + ptr[ofs * 4 + 0] = uint8_t(CLAMP(p_color.r * 255.0, 0, 255)); + ptr[ofs * 4 + 1] = uint8_t(CLAMP(p_color.g * 255.0, 0, 255)); + ptr[ofs * 4 + 2] = uint8_t(CLAMP(p_color.b * 255.0, 0, 255)); + ptr[ofs * 4 + 3] = uint8_t(CLAMP(p_color.a * 255.0, 0, 255)); + + } break; + case FORMAT_RGBA4444: { + uint16_t rgba = 0; + + rgba = uint16_t(CLAMP(p_color.r * 15.0, 0, 15)) << 12; + rgba |= uint16_t(CLAMP(p_color.g * 15.0, 0, 15)) << 8; + rgba |= uint16_t(CLAMP(p_color.b * 15.0, 0, 15)) << 4; + rgba |= uint16_t(CLAMP(p_color.a * 15.0, 0, 15)); + + ((uint16_t *)ptr)[ofs] = rgba; + + } break; + case FORMAT_RGB565: { + uint16_t rgba = 0; + + rgba = uint16_t(CLAMP(p_color.r * 31.0, 0, 31)); + rgba |= uint16_t(CLAMP(p_color.g * 63.0, 0, 33)) << 5; + rgba |= uint16_t(CLAMP(p_color.b * 31.0, 0, 31)) << 11; + + ((uint16_t *)ptr)[ofs] = rgba; + + } break; + case FORMAT_RF: { + ((float *)ptr)[ofs] = p_color.r; + } break; + case FORMAT_RGF: { + ((float *)ptr)[ofs * 2 + 0] = p_color.r; + ((float *)ptr)[ofs * 2 + 1] = p_color.g; + } break; + case FORMAT_RGBF: { + ((float *)ptr)[ofs * 3 + 0] = p_color.r; + ((float *)ptr)[ofs * 3 + 1] = p_color.g; + ((float *)ptr)[ofs * 3 + 2] = p_color.b; + } break; + case FORMAT_RGBAF: { + ((float *)ptr)[ofs * 4 + 0] = p_color.r; + ((float *)ptr)[ofs * 4 + 1] = p_color.g; + ((float *)ptr)[ofs * 4 + 2] = p_color.b; + ((float *)ptr)[ofs * 4 + 3] = p_color.a; + } break; + case FORMAT_RH: { + ((uint16_t *)ptr)[ofs] = Math::make_half_float(p_color.r); + } break; + case FORMAT_RGH: { + ((uint16_t *)ptr)[ofs * 2 + 0] = Math::make_half_float(p_color.r); + ((uint16_t *)ptr)[ofs * 2 + 1] = Math::make_half_float(p_color.g); + } break; + case FORMAT_RGBH: { + ((uint16_t *)ptr)[ofs * 3 + 0] = Math::make_half_float(p_color.r); + ((uint16_t *)ptr)[ofs * 3 + 1] = Math::make_half_float(p_color.g); + ((uint16_t *)ptr)[ofs * 3 + 2] = Math::make_half_float(p_color.b); + } break; + case FORMAT_RGBAH: { + ((uint16_t *)ptr)[ofs * 4 + 0] = Math::make_half_float(p_color.r); + ((uint16_t *)ptr)[ofs * 4 + 1] = Math::make_half_float(p_color.g); + ((uint16_t *)ptr)[ofs * 4 + 2] = Math::make_half_float(p_color.b); + ((uint16_t *)ptr)[ofs * 4 + 3] = Math::make_half_float(p_color.a); + } break; + case FORMAT_RGBE9995: { + ((uint32_t *)ptr)[ofs] = p_color.to_rgbe9995(); + + } break; + default: { + ERR_FAIL_MSG("Can't set_pixel() on compressed image, sorry."); + } + } +} + +Color Image::get_pixel(int p_x, int p_y) const { +#ifdef DEBUG_ENABLED + ERR_FAIL_INDEX_V(p_x, width, Color()); + ERR_FAIL_INDEX_V(p_y, height, Color()); +#endif + + uint32_t ofs = p_y * width + p_x; + return _get_color_at_ofs(data.ptr(), ofs); +} + +void Image::set_pixelv(const Point2i &p_point, const Color &p_color) { + set_pixel(p_point.x, p_point.y, p_color); +} + +void Image::set_pixel(int p_x, int p_y, const Color &p_color) { +#ifdef DEBUG_ENABLED + ERR_FAIL_INDEX(p_x, width); + ERR_FAIL_INDEX(p_y, height); +#endif + + uint32_t ofs = p_y * width + p_x; + _set_color_at_ofs(data.ptrw(), ofs, p_color); +} + +void Image::adjust_bcs(float p_brightness, float p_contrast, float p_saturation) { + ERR_FAIL_COND_MSG(!_can_modify(format), "Cannot adjust_bcs in compressed or custom image formats."); + + uint8_t *w = data.ptrw(); + uint32_t pixel_size = get_format_pixel_size(format); + uint32_t pixel_count = data.size() / pixel_size; + + for (uint32_t i = 0; i < pixel_count; i++) { + Color c = _get_color_at_ofs(w, i); + Vector3 rgb(c.r, c.g, c.b); + + rgb *= p_brightness; + rgb = Vector3(0.5, 0.5, 0.5).lerp(rgb, p_contrast); + float center = (rgb.x + rgb.y + rgb.z) / 3.0; + rgb = Vector3(center, center, center).lerp(rgb, p_saturation); + c.r = rgb.x; + c.g = rgb.y; + c.b = rgb.z; + _set_color_at_ofs(w, i, c); + } +} + +Image::UsedChannels Image::detect_used_channels(CompressSource p_source) { + ERR_FAIL_COND_V(data.size() == 0, USED_CHANNELS_RGBA); + ERR_FAIL_COND_V(is_compressed(), USED_CHANNELS_RGBA); + bool r = false, g = false, b = false, a = false, c = false; + + const uint8_t *data_ptr = data.ptr(); + + uint32_t data_total = width * height; + + for (uint32_t i = 0; i < data_total; i++) { + Color col = _get_color_at_ofs(data_ptr, i); + + if (col.r > 0.001) { + r = true; + } + if (col.g > 0.001) { + g = true; + } + if (col.b > 0.001) { + b = true; + } + if (col.a < 0.999) { + a = true; + } + + if (col.r != col.b || col.r != col.g || col.b != col.g) { + c = true; + } + } + + UsedChannels used_channels; + + if (!c && !a) { + used_channels = USED_CHANNELS_L; + } else if (!c && a) { + used_channels = USED_CHANNELS_LA; + } else if (r && !g && !b && !a) { + used_channels = USED_CHANNELS_R; + } else if (r && g && !b && !a) { + used_channels = USED_CHANNELS_RG; + } else if (r && g && b && !a) { + used_channels = USED_CHANNELS_RGB; + } else { + used_channels = USED_CHANNELS_RGBA; + } + + if (p_source == COMPRESS_SOURCE_SRGB && (used_channels == USED_CHANNELS_R || used_channels == USED_CHANNELS_RG)) { + //R and RG do not support SRGB + used_channels = USED_CHANNELS_RGB; + } + + if (p_source == COMPRESS_SOURCE_NORMAL) { + //use RG channels only for normal + used_channels = USED_CHANNELS_RG; + } + + return used_channels; +} + +void Image::optimize_channels() { + switch (detect_used_channels()) { + case USED_CHANNELS_L: + convert(FORMAT_L8); + break; + case USED_CHANNELS_LA: + convert(FORMAT_LA8); + break; + case USED_CHANNELS_R: + convert(FORMAT_R8); + break; + case USED_CHANNELS_RG: + convert(FORMAT_RG8); + break; + case USED_CHANNELS_RGB: + convert(FORMAT_RGB8); + break; + case USED_CHANNELS_RGBA: + convert(FORMAT_RGBA8); + break; + } +} + +void Image::_bind_methods() { + ClassDB::bind_method(D_METHOD("get_width"), &Image::get_width); + ClassDB::bind_method(D_METHOD("get_height"), &Image::get_height); + ClassDB::bind_method(D_METHOD("get_size"), &Image::get_size); + ClassDB::bind_method(D_METHOD("has_mipmaps"), &Image::has_mipmaps); + ClassDB::bind_method(D_METHOD("get_format"), &Image::get_format); + ClassDB::bind_method(D_METHOD("get_data"), &Image::get_data); + + ClassDB::bind_method(D_METHOD("convert", "format"), &Image::convert); + + ClassDB::bind_method(D_METHOD("get_mipmap_offset", "mipmap"), &Image::get_mipmap_offset); + + ClassDB::bind_method(D_METHOD("resize_to_po2", "square", "interpolation"), &Image::resize_to_po2, DEFVAL(false), DEFVAL(INTERPOLATE_BILINEAR)); + ClassDB::bind_method(D_METHOD("resize", "width", "height", "interpolation"), &Image::resize, DEFVAL(INTERPOLATE_BILINEAR)); + ClassDB::bind_method(D_METHOD("shrink_x2"), &Image::shrink_x2); + + ClassDB::bind_method(D_METHOD("crop", "width", "height"), &Image::crop); + ClassDB::bind_method(D_METHOD("flip_x"), &Image::flip_x); + ClassDB::bind_method(D_METHOD("flip_y"), &Image::flip_y); + ClassDB::bind_method(D_METHOD("generate_mipmaps", "renormalize"), &Image::generate_mipmaps, DEFVAL(false)); + ClassDB::bind_method(D_METHOD("clear_mipmaps"), &Image::clear_mipmaps); + + ClassDB::bind_method(D_METHOD("create", "width", "height", "use_mipmaps", "format"), &Image::_create_empty); + ClassDB::bind_method(D_METHOD("create_from_data", "width", "height", "use_mipmaps", "format", "data"), &Image::_create_from_data); + + ClassDB::bind_method(D_METHOD("is_empty"), &Image::is_empty); + + ClassDB::bind_method(D_METHOD("load", "path"), &Image::load); + ClassDB::bind_method(D_METHOD("save_png", "path"), &Image::save_png); + ClassDB::bind_method(D_METHOD("save_png_to_buffer"), &Image::save_png_to_buffer); + ClassDB::bind_method(D_METHOD("save_exr", "path", "grayscale"), &Image::save_exr, DEFVAL(false)); + + ClassDB::bind_method(D_METHOD("detect_alpha"), &Image::detect_alpha); + ClassDB::bind_method(D_METHOD("is_invisible"), &Image::is_invisible); + + ClassDB::bind_method(D_METHOD("detect_used_channels", "source"), &Image::detect_used_channels, DEFVAL(COMPRESS_SOURCE_GENERIC)); + ClassDB::bind_method(D_METHOD("compress", "mode", "source", "lossy_quality"), &Image::compress, DEFVAL(COMPRESS_SOURCE_GENERIC), DEFVAL(0.7)); + ClassDB::bind_method(D_METHOD("compress_from_channels", "mode", "channels", "lossy_quality"), &Image::compress_from_channels, DEFVAL(0.7)); + ClassDB::bind_method(D_METHOD("decompress"), &Image::decompress); + ClassDB::bind_method(D_METHOD("is_compressed"), &Image::is_compressed); + + ClassDB::bind_method(D_METHOD("fix_alpha_edges"), &Image::fix_alpha_edges); + ClassDB::bind_method(D_METHOD("premultiply_alpha"), &Image::premultiply_alpha); + ClassDB::bind_method(D_METHOD("srgb_to_linear"), &Image::srgb_to_linear); + ClassDB::bind_method(D_METHOD("normal_map_to_xy"), &Image::normal_map_to_xy); + ClassDB::bind_method(D_METHOD("rgbe_to_srgb"), &Image::rgbe_to_srgb); + ClassDB::bind_method(D_METHOD("bump_map_to_normal_map", "bump_scale"), &Image::bump_map_to_normal_map, DEFVAL(1.0)); + + ClassDB::bind_method(D_METHOD("blit_rect", "src", "src_rect", "dst"), &Image::blit_rect); + ClassDB::bind_method(D_METHOD("blit_rect_mask", "src", "mask", "src_rect", "dst"), &Image::blit_rect_mask); + ClassDB::bind_method(D_METHOD("blend_rect", "src", "src_rect", "dst"), &Image::blend_rect); + ClassDB::bind_method(D_METHOD("blend_rect_mask", "src", "mask", "src_rect", "dst"), &Image::blend_rect_mask); + ClassDB::bind_method(D_METHOD("fill", "color"), &Image::fill); + + ClassDB::bind_method(D_METHOD("get_used_rect"), &Image::get_used_rect); + ClassDB::bind_method(D_METHOD("get_rect", "rect"), &Image::get_rect); + + ClassDB::bind_method(D_METHOD("copy_from", "src"), &Image::copy_internals_from); + + ClassDB::bind_method(D_METHOD("_set_data", "data"), &Image::_set_data); + ClassDB::bind_method(D_METHOD("_get_data"), &Image::_get_data); + + ClassDB::bind_method(D_METHOD("get_pixelv", "point"), &Image::get_pixelv); + ClassDB::bind_method(D_METHOD("get_pixel", "x", "y"), &Image::get_pixel); + ClassDB::bind_method(D_METHOD("set_pixelv", "point", "color"), &Image::set_pixelv); + ClassDB::bind_method(D_METHOD("set_pixel", "x", "y", "color"), &Image::set_pixel); + + ClassDB::bind_method(D_METHOD("adjust_bcs", "brightness", "contrast", "saturation"), &Image::adjust_bcs); + + ClassDB::bind_method(D_METHOD("load_png_from_buffer", "buffer"), &Image::load_png_from_buffer); + ClassDB::bind_method(D_METHOD("load_jpg_from_buffer", "buffer"), &Image::load_jpg_from_buffer); + ClassDB::bind_method(D_METHOD("load_webp_from_buffer", "buffer"), &Image::load_webp_from_buffer); + ClassDB::bind_method(D_METHOD("load_tga_from_buffer", "buffer"), &Image::load_tga_from_buffer); + ClassDB::bind_method(D_METHOD("load_bmp_from_buffer", "buffer"), &Image::load_bmp_from_buffer); + + ADD_PROPERTY(PropertyInfo(Variant::DICTIONARY, "data", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_STORAGE), "_set_data", "_get_data"); + + BIND_CONSTANT(MAX_WIDTH); + BIND_CONSTANT(MAX_HEIGHT); + + BIND_ENUM_CONSTANT(FORMAT_L8); //luminance + BIND_ENUM_CONSTANT(FORMAT_LA8); //luminance-alpha + BIND_ENUM_CONSTANT(FORMAT_R8); + BIND_ENUM_CONSTANT(FORMAT_RG8); + BIND_ENUM_CONSTANT(FORMAT_RGB8); + BIND_ENUM_CONSTANT(FORMAT_RGBA8); + BIND_ENUM_CONSTANT(FORMAT_RGBA4444); + BIND_ENUM_CONSTANT(FORMAT_RGB565); + BIND_ENUM_CONSTANT(FORMAT_RF); //float + BIND_ENUM_CONSTANT(FORMAT_RGF); + BIND_ENUM_CONSTANT(FORMAT_RGBF); + BIND_ENUM_CONSTANT(FORMAT_RGBAF); + BIND_ENUM_CONSTANT(FORMAT_RH); //half float + BIND_ENUM_CONSTANT(FORMAT_RGH); + BIND_ENUM_CONSTANT(FORMAT_RGBH); + BIND_ENUM_CONSTANT(FORMAT_RGBAH); + BIND_ENUM_CONSTANT(FORMAT_RGBE9995); + BIND_ENUM_CONSTANT(FORMAT_DXT1); //s3tc bc1 + BIND_ENUM_CONSTANT(FORMAT_DXT3); //bc2 + BIND_ENUM_CONSTANT(FORMAT_DXT5); //bc3 + BIND_ENUM_CONSTANT(FORMAT_RGTC_R); + BIND_ENUM_CONSTANT(FORMAT_RGTC_RG); + BIND_ENUM_CONSTANT(FORMAT_BPTC_RGBA); //btpc bc6h + BIND_ENUM_CONSTANT(FORMAT_BPTC_RGBF); //float / + BIND_ENUM_CONSTANT(FORMAT_BPTC_RGBFU); //unsigned float + BIND_ENUM_CONSTANT(FORMAT_PVRTC1_2); //pvrtc + BIND_ENUM_CONSTANT(FORMAT_PVRTC1_2A); + BIND_ENUM_CONSTANT(FORMAT_PVRTC1_4); + BIND_ENUM_CONSTANT(FORMAT_PVRTC1_4A); + BIND_ENUM_CONSTANT(FORMAT_ETC); //etc1 + BIND_ENUM_CONSTANT(FORMAT_ETC2_R11); //etc2 + BIND_ENUM_CONSTANT(FORMAT_ETC2_R11S); //signed ); NOT srgb. + BIND_ENUM_CONSTANT(FORMAT_ETC2_RG11); + BIND_ENUM_CONSTANT(FORMAT_ETC2_RG11S); + BIND_ENUM_CONSTANT(FORMAT_ETC2_RGB8); + BIND_ENUM_CONSTANT(FORMAT_ETC2_RGBA8); + BIND_ENUM_CONSTANT(FORMAT_ETC2_RGB8A1); + BIND_ENUM_CONSTANT(FORMAT_ETC2_RA_AS_RG); + BIND_ENUM_CONSTANT(FORMAT_DXT5_RA_AS_RG); + BIND_ENUM_CONSTANT(FORMAT_MAX); + + BIND_ENUM_CONSTANT(INTERPOLATE_NEAREST); + BIND_ENUM_CONSTANT(INTERPOLATE_BILINEAR); + BIND_ENUM_CONSTANT(INTERPOLATE_CUBIC); + BIND_ENUM_CONSTANT(INTERPOLATE_TRILINEAR); + BIND_ENUM_CONSTANT(INTERPOLATE_LANCZOS); + + BIND_ENUM_CONSTANT(ALPHA_NONE); + BIND_ENUM_CONSTANT(ALPHA_BIT); + BIND_ENUM_CONSTANT(ALPHA_BLEND); + + BIND_ENUM_CONSTANT(COMPRESS_S3TC); + BIND_ENUM_CONSTANT(COMPRESS_PVRTC1_4); + BIND_ENUM_CONSTANT(COMPRESS_ETC); + BIND_ENUM_CONSTANT(COMPRESS_ETC2); + BIND_ENUM_CONSTANT(COMPRESS_BPTC); + + BIND_ENUM_CONSTANT(USED_CHANNELS_L); + BIND_ENUM_CONSTANT(USED_CHANNELS_LA); + BIND_ENUM_CONSTANT(USED_CHANNELS_R); + BIND_ENUM_CONSTANT(USED_CHANNELS_RG); + BIND_ENUM_CONSTANT(USED_CHANNELS_RGB); + BIND_ENUM_CONSTANT(USED_CHANNELS_RGBA); + + BIND_ENUM_CONSTANT(COMPRESS_SOURCE_GENERIC); + BIND_ENUM_CONSTANT(COMPRESS_SOURCE_SRGB); + BIND_ENUM_CONSTANT(COMPRESS_SOURCE_NORMAL); +} + +void Image::set_compress_bc_func(void (*p_compress_func)(Image *, float, UsedChannels)) { + _image_compress_bc_func = p_compress_func; +} + +void Image::set_compress_bptc_func(void (*p_compress_func)(Image *, float, UsedChannels)) { + _image_compress_bptc_func = p_compress_func; +} + +void Image::normal_map_to_xy() { + convert(Image::FORMAT_RGBA8); + + { + int len = data.size() / 4; + uint8_t *data_ptr = data.ptrw(); + + for (int i = 0; i < len; i++) { + data_ptr[(i << 2) + 3] = data_ptr[(i << 2) + 0]; //x to w + data_ptr[(i << 2) + 0] = data_ptr[(i << 2) + 1]; //y to xz + data_ptr[(i << 2) + 2] = data_ptr[(i << 2) + 1]; + } + } + + convert(Image::FORMAT_LA8); +} + +Ref<Image> Image::rgbe_to_srgb() { + if (data.size() == 0) { + return Ref<Image>(); + } + + ERR_FAIL_COND_V(format != FORMAT_RGBE9995, Ref<Image>()); + + Ref<Image> new_image; + new_image.instantiate(); + new_image->create(width, height, false, Image::FORMAT_RGB8); + + for (int row = 0; row < height; row++) { + for (int col = 0; col < width; col++) { + new_image->set_pixel(col, row, get_pixel(col, row).to_srgb()); + } + } + + if (has_mipmaps()) { + new_image->generate_mipmaps(); + } + + return new_image; +} + +Ref<Image> Image::get_image_from_mipmap(int p_mipamp) const { + int ofs, size, w, h; + get_mipmap_offset_size_and_dimensions(p_mipamp, ofs, size, w, h); + + Vector<uint8_t> new_data; + new_data.resize(size); + + { + uint8_t *wr = new_data.ptrw(); + const uint8_t *rd = data.ptr(); + memcpy(wr, rd + ofs, size); + } + + Ref<Image> image; + image.instantiate(); + image->width = w; + image->height = h; + image->format = format; + image->data = new_data; + + image->mipmaps = false; + return image; +} + +void Image::bump_map_to_normal_map(float bump_scale) { + ERR_FAIL_COND(!_can_modify(format)); + convert(Image::FORMAT_RF); + + Vector<uint8_t> result_image; //rgba output + result_image.resize(width * height * 4); + + { + const uint8_t *rp = data.ptr(); + uint8_t *wp = result_image.ptrw(); + + ERR_FAIL_COND(!rp); + + unsigned char *write_ptr = wp; + float *read_ptr = (float *)rp; + + for (int ty = 0; ty < height; ty++) { + int py = ty + 1; + if (py >= height) { + py -= height; + } + + for (int tx = 0; tx < width; tx++) { + int px = tx + 1; + if (px >= width) { + px -= width; + } + float here = read_ptr[ty * width + tx]; + float to_right = read_ptr[ty * width + px]; + float above = read_ptr[py * width + tx]; + Vector3 up = Vector3(0, 1, (here - above) * bump_scale); + Vector3 across = Vector3(1, 0, (to_right - here) * bump_scale); + + Vector3 normal = across.cross(up); + normal.normalize(); + + write_ptr[((ty * width + tx) << 2) + 0] = (127.5 + normal.x * 127.5); + write_ptr[((ty * width + tx) << 2) + 1] = (127.5 + normal.y * 127.5); + write_ptr[((ty * width + tx) << 2) + 2] = (127.5 + normal.z * 127.5); + write_ptr[((ty * width + tx) << 2) + 3] = 255; + } + } + } + format = FORMAT_RGBA8; + data = result_image; +} + +void Image::srgb_to_linear() { + if (data.size() == 0) { + return; + } + + static const uint8_t srgb2lin[256] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 22, 22, 23, 23, 24, 24, 25, 26, 26, 27, 27, 28, 29, 29, 30, 31, 31, 32, 33, 33, 34, 35, 36, 36, 37, 38, 38, 39, 40, 41, 42, 42, 43, 44, 45, 46, 47, 47, 48, 49, 50, 51, 52, 53, 54, 55, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 70, 71, 72, 73, 74, 75, 76, 77, 78, 80, 81, 82, 83, 84, 85, 87, 88, 89, 90, 92, 93, 94, 95, 97, 98, 99, 101, 102, 103, 105, 106, 107, 109, 110, 112, 113, 114, 116, 117, 119, 120, 122, 123, 125, 126, 128, 129, 131, 132, 134, 135, 137, 139, 140, 142, 144, 145, 147, 148, 150, 152, 153, 155, 157, 159, 160, 162, 164, 166, 167, 169, 171, 173, 175, 176, 178, 180, 182, 184, 186, 188, 190, 192, 193, 195, 197, 199, 201, 203, 205, 207, 209, 211, 213, 215, 218, 220, 222, 224, 226, 228, 230, 232, 235, 237, 239, 241, 243, 245, 248, 250, 252, 255 }; + + ERR_FAIL_COND(format != FORMAT_RGB8 && format != FORMAT_RGBA8); + + if (format == FORMAT_RGBA8) { + int len = data.size() / 4; + uint8_t *data_ptr = data.ptrw(); + + for (int i = 0; i < len; i++) { + data_ptr[(i << 2) + 0] = srgb2lin[data_ptr[(i << 2) + 0]]; + data_ptr[(i << 2) + 1] = srgb2lin[data_ptr[(i << 2) + 1]]; + data_ptr[(i << 2) + 2] = srgb2lin[data_ptr[(i << 2) + 2]]; + } + + } else if (format == FORMAT_RGB8) { + int len = data.size() / 3; + uint8_t *data_ptr = data.ptrw(); + + for (int i = 0; i < len; i++) { + data_ptr[(i * 3) + 0] = srgb2lin[data_ptr[(i * 3) + 0]]; + data_ptr[(i * 3) + 1] = srgb2lin[data_ptr[(i * 3) + 1]]; + data_ptr[(i * 3) + 2] = srgb2lin[data_ptr[(i * 3) + 2]]; + } + } +} + +void Image::premultiply_alpha() { + if (data.size() == 0) { + return; + } + + if (format != FORMAT_RGBA8) { + return; //not needed + } + + uint8_t *data_ptr = data.ptrw(); + + for (int i = 0; i < height; i++) { + for (int j = 0; j < width; j++) { + uint8_t *ptr = &data_ptr[(i * width + j) * 4]; + + ptr[0] = (uint16_t(ptr[0]) * uint16_t(ptr[3])) >> 8; + ptr[1] = (uint16_t(ptr[1]) * uint16_t(ptr[3])) >> 8; + ptr[2] = (uint16_t(ptr[2]) * uint16_t(ptr[3])) >> 8; + } + } +} + +void Image::fix_alpha_edges() { + if (data.size() == 0) { + return; + } + + if (format != FORMAT_RGBA8) { + return; //not needed + } + + Vector<uint8_t> dcopy = data; + const uint8_t *srcptr = dcopy.ptr(); + + uint8_t *data_ptr = data.ptrw(); + + const int max_radius = 4; + const int alpha_threshold = 20; + const int max_dist = 0x7FFFFFFF; + + for (int i = 0; i < height; i++) { + for (int j = 0; j < width; j++) { + const uint8_t *rptr = &srcptr[(i * width + j) * 4]; + uint8_t *wptr = &data_ptr[(i * width + j) * 4]; + + if (rptr[3] >= alpha_threshold) { + continue; + } + + int closest_dist = max_dist; + uint8_t closest_color[3]; + + int from_x = MAX(0, j - max_radius); + int to_x = MIN(width - 1, j + max_radius); + int from_y = MAX(0, i - max_radius); + int to_y = MIN(height - 1, i + max_radius); + + for (int k = from_y; k <= to_y; k++) { + for (int l = from_x; l <= to_x; l++) { + int dy = i - k; + int dx = j - l; + int dist = dy * dy + dx * dx; + if (dist >= closest_dist) { + continue; + } + + const uint8_t *rp2 = &srcptr[(k * width + l) << 2]; + + if (rp2[3] < alpha_threshold) { + continue; + } + + closest_dist = dist; + closest_color[0] = rp2[0]; + closest_color[1] = rp2[1]; + closest_color[2] = rp2[2]; + } + } + + if (closest_dist != max_dist) { + wptr[0] = closest_color[0]; + wptr[1] = closest_color[1]; + wptr[2] = closest_color[2]; + } + } + } +} + +String Image::get_format_name(Format p_format) { + ERR_FAIL_INDEX_V(p_format, FORMAT_MAX, String()); + return format_names[p_format]; +} + +Error Image::load_png_from_buffer(const Vector<uint8_t> &p_array) { + return _load_from_buffer(p_array, _png_mem_loader_func); +} + +Error Image::load_jpg_from_buffer(const Vector<uint8_t> &p_array) { + return _load_from_buffer(p_array, _jpg_mem_loader_func); +} + +Error Image::load_webp_from_buffer(const Vector<uint8_t> &p_array) { + return _load_from_buffer(p_array, _webp_mem_loader_func); +} + +Error Image::load_tga_from_buffer(const Vector<uint8_t> &p_array) { + ERR_FAIL_NULL_V_MSG( + _tga_mem_loader_func, + ERR_UNAVAILABLE, + "The TGA module isn't enabled. Recompile the Godot editor or export template binary with the `module_tga_enabled=yes` SCons option."); + return _load_from_buffer(p_array, _tga_mem_loader_func); +} + +Error Image::load_bmp_from_buffer(const Vector<uint8_t> &p_array) { + ERR_FAIL_NULL_V_MSG( + _bmp_mem_loader_func, + ERR_UNAVAILABLE, + "The BMP module isn't enabled. Recompile the Godot editor or export template binary with the `module_bmp_enabled=yes` SCons option."); + return _load_from_buffer(p_array, _bmp_mem_loader_func); +} + +void Image::convert_rg_to_ra_rgba8() { + ERR_FAIL_COND(format != FORMAT_RGBA8); + ERR_FAIL_COND(!data.size()); + + int s = data.size(); + uint8_t *w = data.ptrw(); + for (int i = 0; i < s; i += 4) { + w[i + 3] = w[i + 1]; + w[i + 1] = 0; + w[i + 2] = 0; + } +} + +void Image::convert_ra_rgba8_to_rg() { + ERR_FAIL_COND(format != FORMAT_RGBA8); + ERR_FAIL_COND(!data.size()); + + int s = data.size(); + uint8_t *w = data.ptrw(); + for (int i = 0; i < s; i += 4) { + w[i + 1] = w[i + 3]; + w[i + 2] = 0; + w[i + 3] = 255; + } +} + +Error Image::_load_from_buffer(const Vector<uint8_t> &p_array, ImageMemLoadFunc p_loader) { + int buffer_size = p_array.size(); + + ERR_FAIL_COND_V(buffer_size == 0, ERR_INVALID_PARAMETER); + ERR_FAIL_COND_V(!p_loader, ERR_INVALID_PARAMETER); + + const uint8_t *r = p_array.ptr(); + + Ref<Image> image = p_loader(r, buffer_size); + ERR_FAIL_COND_V(!image.is_valid(), ERR_PARSE_ERROR); + + copy_internals_from(image); + + return OK; +} + +void Image::average_4_uint8(uint8_t &p_out, const uint8_t &p_a, const uint8_t &p_b, const uint8_t &p_c, const uint8_t &p_d) { + p_out = static_cast<uint8_t>((p_a + p_b + p_c + p_d + 2) >> 2); +} + +void Image::average_4_float(float &p_out, const float &p_a, const float &p_b, const float &p_c, const float &p_d) { + p_out = (p_a + p_b + p_c + p_d) * 0.25f; +} + +void Image::average_4_half(uint16_t &p_out, const uint16_t &p_a, const uint16_t &p_b, const uint16_t &p_c, const uint16_t &p_d) { + p_out = Math::make_half_float((Math::half_to_float(p_a) + Math::half_to_float(p_b) + Math::half_to_float(p_c) + Math::half_to_float(p_d)) * 0.25f); +} + +void Image::average_4_rgbe9995(uint32_t &p_out, const uint32_t &p_a, const uint32_t &p_b, const uint32_t &p_c, const uint32_t &p_d) { + p_out = ((Color::from_rgbe9995(p_a) + Color::from_rgbe9995(p_b) + Color::from_rgbe9995(p_c) + Color::from_rgbe9995(p_d)) * 0.25f).to_rgbe9995(); +} + +void Image::renormalize_uint8(uint8_t *p_rgb) { + Vector3 n(p_rgb[0] / 255.0, p_rgb[1] / 255.0, p_rgb[2] / 255.0); + n *= 2.0; + n -= Vector3(1, 1, 1); + n.normalize(); + n += Vector3(1, 1, 1); + n *= 0.5; + n *= 255; + p_rgb[0] = CLAMP(int(n.x), 0, 255); + p_rgb[1] = CLAMP(int(n.y), 0, 255); + p_rgb[2] = CLAMP(int(n.z), 0, 255); +} + +void Image::renormalize_float(float *p_rgb) { + Vector3 n(p_rgb[0], p_rgb[1], p_rgb[2]); + n.normalize(); + p_rgb[0] = n.x; + p_rgb[1] = n.y; + p_rgb[2] = n.z; +} + +void Image::renormalize_half(uint16_t *p_rgb) { + Vector3 n(Math::half_to_float(p_rgb[0]), Math::half_to_float(p_rgb[1]), Math::half_to_float(p_rgb[2])); + n.normalize(); + p_rgb[0] = Math::make_half_float(n.x); + p_rgb[1] = Math::make_half_float(n.y); + p_rgb[2] = Math::make_half_float(n.z); +} + +void Image::renormalize_rgbe9995(uint32_t *p_rgb) { + // Never used +} + +Image::Image(const uint8_t *p_mem_png_jpg, int p_len) { + width = 0; + height = 0; + mipmaps = false; + format = FORMAT_L8; + + if (_png_mem_loader_func) { + copy_internals_from(_png_mem_loader_func(p_mem_png_jpg, p_len)); + } + + if (is_empty() && _jpg_mem_loader_func) { + copy_internals_from(_jpg_mem_loader_func(p_mem_png_jpg, p_len)); + } +} + +Ref<Resource> Image::duplicate(bool p_subresources) const { + Ref<Image> copy; + copy.instantiate(); + copy->_copy_internals_from(*this); + return copy; +} + +void Image::set_as_black() { + memset(data.ptrw(), 0, data.size()); +} |