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Diffstat (limited to 'core/io/image.h')
| -rw-r--r-- | core/io/image.h | 417 |
1 files changed, 417 insertions, 0 deletions
diff --git a/core/io/image.h b/core/io/image.h new file mode 100644 index 0000000000..fecb90cab0 --- /dev/null +++ b/core/io/image.h @@ -0,0 +1,417 @@ +/*************************************************************************/ +/* image.h */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2020 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. */ +/*************************************************************************/ + +#ifndef IMAGE_H +#define IMAGE_H + +#include "core/io/resource.h" +#include "core/math/color.h" +#include "core/math/rect2.h" + +/** + * @author Juan Linietsky <reduzio@gmail.com> + * + * Image storage class. This is used to store an image in user memory, as well as + * providing some basic methods for image manipulation. + * Images can be loaded from a file, or registered into the Render object as textures. +*/ + +class Image; + +typedef Error (*SavePNGFunc)(const String &p_path, const Ref<Image> &p_img); +typedef Vector<uint8_t> (*SavePNGBufferFunc)(const Ref<Image> &p_img); +typedef Ref<Image> (*ImageMemLoadFunc)(const uint8_t *p_png, int p_size); + +typedef Error (*SaveEXRFunc)(const String &p_path, const Ref<Image> &p_img, bool p_grayscale); + +class Image : public Resource { + GDCLASS(Image, Resource); + +public: + static SavePNGFunc save_png_func; + static SaveEXRFunc save_exr_func; + static SavePNGBufferFunc save_png_buffer_func; + + enum { + MAX_WIDTH = (1 << 24), // force a limit somehow + MAX_HEIGHT = (1 << 24), // force a limit somehow + MAX_PIXELS = 268435456 + }; + + enum Format { + + FORMAT_L8, //luminance + FORMAT_LA8, //luminance-alpha + FORMAT_R8, + FORMAT_RG8, + FORMAT_RGB8, + FORMAT_RGBA8, + FORMAT_RGBA4444, + FORMAT_RGB565, + FORMAT_RF, //float + FORMAT_RGF, + FORMAT_RGBF, + FORMAT_RGBAF, + FORMAT_RH, //half float + FORMAT_RGH, + FORMAT_RGBH, + FORMAT_RGBAH, + FORMAT_RGBE9995, + FORMAT_DXT1, //s3tc bc1 + FORMAT_DXT3, //bc2 + FORMAT_DXT5, //bc3 + FORMAT_RGTC_R, + FORMAT_RGTC_RG, + FORMAT_BPTC_RGBA, //btpc bc7 + FORMAT_BPTC_RGBF, //float bc6h + FORMAT_BPTC_RGBFU, //unsigned float bc6hu + FORMAT_PVRTC2, //pvrtc + FORMAT_PVRTC2A, + FORMAT_PVRTC4, + FORMAT_PVRTC4A, + FORMAT_ETC, //etc1 + FORMAT_ETC2_R11, //etc2 + FORMAT_ETC2_R11S, //signed, NOT srgb. + FORMAT_ETC2_RG11, + FORMAT_ETC2_RG11S, + FORMAT_ETC2_RGB8, + FORMAT_ETC2_RGBA8, + FORMAT_ETC2_RGB8A1, + FORMAT_ETC2_RA_AS_RG, //used to make basis universal happy + FORMAT_DXT5_RA_AS_RG, //used to make basis universal happy + FORMAT_MAX + }; + + static const char *format_names[FORMAT_MAX]; + enum Interpolation { + + INTERPOLATE_NEAREST, + INTERPOLATE_BILINEAR, + INTERPOLATE_CUBIC, + INTERPOLATE_TRILINEAR, + INTERPOLATE_LANCZOS, + /* INTERPOLATE_TRICUBIC, */ + /* INTERPOLATE GAUSS */ + }; + + //this is used for compression + enum UsedChannels { + USED_CHANNELS_L, + USED_CHANNELS_LA, + USED_CHANNELS_R, + USED_CHANNELS_RG, + USED_CHANNELS_RGB, + USED_CHANNELS_RGBA, + }; + //some functions provided by something else + + static ImageMemLoadFunc _png_mem_loader_func; + static ImageMemLoadFunc _jpg_mem_loader_func; + static ImageMemLoadFunc _webp_mem_loader_func; + static ImageMemLoadFunc _tga_mem_loader_func; + static ImageMemLoadFunc _bmp_mem_loader_func; + + static void (*_image_compress_bc_func)(Image *, float, UsedChannels p_channels); + static void (*_image_compress_bptc_func)(Image *, float p_lossy_quality, UsedChannels p_channels); + static void (*_image_compress_pvrtc2_func)(Image *); + static void (*_image_compress_pvrtc4_func)(Image *); + static void (*_image_compress_etc1_func)(Image *, float); + static void (*_image_compress_etc2_func)(Image *, float, UsedChannels p_channels); + + static void (*_image_decompress_pvrtc)(Image *); + static void (*_image_decompress_bc)(Image *); + static void (*_image_decompress_bptc)(Image *); + static void (*_image_decompress_etc1)(Image *); + static void (*_image_decompress_etc2)(Image *); + + static Vector<uint8_t> (*lossy_packer)(const Ref<Image> &p_image, float p_quality); + static Ref<Image> (*lossy_unpacker)(const Vector<uint8_t> &p_buffer); + static Vector<uint8_t> (*lossless_packer)(const Ref<Image> &p_image); + static Ref<Image> (*lossless_unpacker)(const Vector<uint8_t> &p_buffer); + static Vector<uint8_t> (*basis_universal_packer)(const Ref<Image> &p_image, UsedChannels p_channels); + static Ref<Image> (*basis_universal_unpacker)(const Vector<uint8_t> &p_buffer); + + _FORCE_INLINE_ Color _get_color_at_ofs(const uint8_t *ptr, uint32_t ofs) const; + _FORCE_INLINE_ void _set_color_at_ofs(uint8_t *ptr, uint32_t ofs, const Color &p_color); + +protected: + static void _bind_methods(); + +private: + void _create_empty(int p_width, int p_height, bool p_use_mipmaps, Format p_format) { + create(p_width, p_height, p_use_mipmaps, p_format); + } + + void _create_from_data(int p_width, int p_height, bool p_use_mipmaps, Format p_format, const Vector<uint8_t> &p_data) { + create(p_width, p_height, p_use_mipmaps, p_format, p_data); + } + + Format format = FORMAT_L8; + Vector<uint8_t> data; + int width = 0; + int height = 0; + bool mipmaps = false; + + void _copy_internals_from(const Image &p_image) { + format = p_image.format; + width = p_image.width; + height = p_image.height; + mipmaps = p_image.mipmaps; + data = p_image.data; + } + + _FORCE_INLINE_ void _get_mipmap_offset_and_size(int p_mipmap, int &r_offset, int &r_width, int &r_height) const; //get where the mipmap begins in data + + static int _get_dst_image_size(int p_width, int p_height, Format p_format, int &r_mipmaps, int p_mipmaps = -1, int *r_mm_width = nullptr, int *r_mm_height = nullptr); + bool _can_modify(Format p_format) const; + + _FORCE_INLINE_ void _put_pixelb(int p_x, int p_y, uint32_t p_pixelsize, uint8_t *p_data, const uint8_t *p_pixel); + _FORCE_INLINE_ void _get_pixelb(int p_x, int p_y, uint32_t p_pixelsize, const uint8_t *p_data, uint8_t *p_pixel); + + void _set_data(const Dictionary &p_data); + Dictionary _get_data() const; + + Error _load_from_buffer(const Vector<uint8_t> &p_array, ImageMemLoadFunc p_loader); + + static void 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); + static void average_4_float(float &p_out, const float &p_a, const float &p_b, const float &p_c, const float &p_d); + static void 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); + static void 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); + static void renormalize_uint8(uint8_t *p_rgb); + static void renormalize_float(float *p_rgb); + static void renormalize_half(uint16_t *p_rgb); + static void renormalize_rgbe9995(uint32_t *p_rgb); + +public: + int get_width() const; ///< Get image width + int get_height() const; ///< Get image height + Vector2 get_size() const; + bool has_mipmaps() const; + int get_mipmap_count() const; + + /** + * Convert the image to another format, conversion only to raw byte format + */ + void convert(Format p_new_format); + + /** + * Get the current image format. + */ + Format get_format() const; + + int get_mipmap_byte_size(int p_mipmap) const; //get where the mipmap begins in data + int get_mipmap_offset(int p_mipmap) const; //get where the mipmap begins in data + void get_mipmap_offset_and_size(int p_mipmap, int &r_ofs, int &r_size) const; //get where the mipmap begins in data + void get_mipmap_offset_size_and_dimensions(int p_mipmap, int &r_ofs, int &r_size, int &w, int &h) const; //get where the mipmap begins in data + + enum Image3DValidateError { + VALIDATE_3D_OK, + VALIDATE_3D_ERR_IMAGE_EMPTY, + VALIDATE_3D_ERR_MISSING_IMAGES, + VALIDATE_3D_ERR_EXTRA_IMAGES, + VALIDATE_3D_ERR_IMAGE_SIZE_MISMATCH, + VALIDATE_3D_ERR_IMAGE_FORMAT_MISMATCH, + VALIDATE_3D_ERR_IMAGE_HAS_MIPMAPS, + }; + + static Image3DValidateError validate_3d_image(Format p_format, int p_width, int p_height, int p_depth, bool p_mipmaps, const Vector<Ref<Image>> &p_images); + static String get_3d_image_validation_error_text(Image3DValidateError p_error); + + /** + * Resize the image, using the preferred interpolation method. + */ + void resize_to_po2(bool p_square = false); + void resize(int p_width, int p_height, Interpolation p_interpolation = INTERPOLATE_BILINEAR); + void shrink_x2(); + bool is_size_po2() const; + /** + * Crop the image to a specific size, if larger, then the image is filled by black + */ + void crop_from_point(int p_x, int p_y, int p_width, int p_height); + void crop(int p_width, int p_height); + + void flip_x(); + void flip_y(); + + /** + * Generate a mipmap to an image (creates an image 1/4 the size, with averaging of 4->1) + */ + Error generate_mipmaps(bool p_renormalize = false); + + enum RoughnessChannel { + ROUGHNESS_CHANNEL_R, + ROUGHNESS_CHANNEL_G, + ROUGHNESS_CHANNEL_B, + ROUGHNESS_CHANNEL_A, + ROUGHNESS_CHANNEL_L, + }; + + Error generate_mipmap_roughness(RoughnessChannel p_roughness_channel, const Ref<Image> &p_normal_map); + + void clear_mipmaps(); + void normalize(); //for normal maps + + /** + * Create a new image of a given size and format. Current image will be lost + */ + void create(int p_width, int p_height, bool p_use_mipmaps, Format p_format); + void create(int p_width, int p_height, bool p_use_mipmaps, Format p_format, const Vector<uint8_t> &p_data); + + void create(const char **p_xpm); + /** + * returns true when the image is empty (0,0) in size + */ + bool empty() const; + + Vector<uint8_t> get_data() const; + + Error load(const String &p_path); + Error save_png(const String &p_path) const; + Vector<uint8_t> save_png_to_buffer() const; + Error save_exr(const String &p_path, bool p_grayscale) const; + + /** + * create an empty image + */ + Image() {} + /** + * create an empty image of a specific size and format + */ + Image(int p_width, int p_height, bool p_use_mipmaps, Format p_format); + /** + * import an image of a specific size and format from a pointer + */ + Image(int p_width, int p_height, bool p_mipmaps, Format p_format, const Vector<uint8_t> &p_data); + + ~Image() {} + + enum AlphaMode { + ALPHA_NONE, + ALPHA_BIT, + ALPHA_BLEND + }; + + AlphaMode detect_alpha() const; + bool is_invisible() const; + + static int get_format_pixel_size(Format p_format); + static int get_format_pixel_rshift(Format p_format); + static int get_format_block_size(Format p_format); + static void get_format_min_pixel_size(Format p_format, int &r_w, int &r_h); + + static int get_image_data_size(int p_width, int p_height, Format p_format, bool p_mipmaps = false); + static int get_image_required_mipmaps(int p_width, int p_height, Format p_format); + static Size2i get_image_mipmap_size(int p_width, int p_height, Format p_format, int p_mipmap); + static int get_image_mipmap_offset(int p_width, int p_height, Format p_format, int p_mipmap); + static int get_image_mipmap_offset_and_dimensions(int p_width, int p_height, Format p_format, int p_mipmap, int &r_w, int &r_h); + + enum CompressMode { + COMPRESS_S3TC, + COMPRESS_PVRTC2, + COMPRESS_PVRTC4, + COMPRESS_ETC, + COMPRESS_ETC2, + COMPRESS_BPTC + }; + enum CompressSource { + COMPRESS_SOURCE_GENERIC, + COMPRESS_SOURCE_SRGB, + COMPRESS_SOURCE_NORMAL + }; + + Error compress(CompressMode p_mode, CompressSource p_source = COMPRESS_SOURCE_GENERIC, float p_lossy_quality = 0.7); + Error compress_from_channels(CompressMode p_mode, UsedChannels p_channels, float p_lossy_quality = 0.7); + Error decompress(); + bool is_compressed() const; + + void fix_alpha_edges(); + void premultiply_alpha(); + void srgb_to_linear(); + void normalmap_to_xy(); + Ref<Image> rgbe_to_srgb(); + Ref<Image> get_image_from_mipmap(int p_mipamp) const; + void bumpmap_to_normalmap(float bump_scale = 1.0); + + void blit_rect(const Ref<Image> &p_src, const Rect2 &p_src_rect, const Point2 &p_dest); + void blit_rect_mask(const Ref<Image> &p_src, const Ref<Image> &p_mask, const Rect2 &p_src_rect, const Point2 &p_dest); + void blend_rect(const Ref<Image> &p_src, const Rect2 &p_src_rect, const Point2 &p_dest); + void blend_rect_mask(const Ref<Image> &p_src, const Ref<Image> &p_mask, const Rect2 &p_src_rect, const Point2 &p_dest); + void fill(const Color &c); + + Rect2 get_used_rect() const; + Ref<Image> get_rect(const Rect2 &p_area) const; + + static void set_compress_bc_func(void (*p_compress_func)(Image *, float, UsedChannels)); + static void set_compress_bptc_func(void (*p_compress_func)(Image *, float, UsedChannels)); + static String get_format_name(Format p_format); + + Error load_png_from_buffer(const Vector<uint8_t> &p_array); + Error load_jpg_from_buffer(const Vector<uint8_t> &p_array); + Error load_webp_from_buffer(const Vector<uint8_t> &p_array); + Error load_tga_from_buffer(const Vector<uint8_t> &p_array); + Error load_bmp_from_buffer(const Vector<uint8_t> &p_array); + + void convert_rg_to_ra_rgba8(); + void convert_ra_rgba8_to_rg(); + + Image(const uint8_t *p_mem_png_jpg, int p_len = -1); + Image(const char **p_xpm); + + virtual Ref<Resource> duplicate(bool p_subresources = false) const override; + + UsedChannels detect_used_channels(CompressSource p_source = COMPRESS_SOURCE_GENERIC); + void optimize_channels(); + + Color get_pixelv(const Point2 &p_src) const; + Color get_pixel(int p_x, int p_y) const; + void set_pixelv(const Point2 &p_dst, const Color &p_color); + void set_pixel(int p_x, int p_y, const Color &p_color); + + void set_as_black(); + + void copy_internals_from(const Ref<Image> &p_image) { + ERR_FAIL_COND_MSG(p_image.is_null(), "It's not a reference to a valid Image object."); + format = p_image->format; + width = p_image->width; + height = p_image->height; + mipmaps = p_image->mipmaps; + data = p_image->data; + } +}; + +VARIANT_ENUM_CAST(Image::Format) +VARIANT_ENUM_CAST(Image::Interpolation) +VARIANT_ENUM_CAST(Image::CompressMode) +VARIANT_ENUM_CAST(Image::CompressSource) +VARIANT_ENUM_CAST(Image::UsedChannels) +VARIANT_ENUM_CAST(Image::AlphaMode) +VARIANT_ENUM_CAST(Image::RoughnessChannel) + +#endif // IMAGE_H |