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Diffstat (limited to 'modules/tga/image_loader_tga.cpp')
-rw-r--r--modules/tga/image_loader_tga.cpp314
1 files changed, 314 insertions, 0 deletions
diff --git a/modules/tga/image_loader_tga.cpp b/modules/tga/image_loader_tga.cpp
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+++ b/modules/tga/image_loader_tga.cpp
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+/*************************************************************************/
+/* image_loader_jpegd.cpp */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* http://www.godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2017 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_loader_tga.h"
+
+#include "os/os.h"
+#include "print_string.h"
+
+Error ImageLoaderTGA::decode_tga_rle(const uint8_t *p_compressed_buffer, size_t p_pixel_size, uint8_t *p_uncompressed_buffer, size_t p_output_size) {
+ Error error;
+
+ PoolVector<uint8_t> pixels;
+ error = pixels.resize(p_pixel_size);
+ if (error != OK)
+ return error;
+
+ PoolVector<uint8_t>::Write pixels_w = pixels.write();
+
+ size_t compressed_pos = 0;
+ size_t output_pos = 0;
+ size_t c = 0;
+ size_t count = 0;
+
+ while (output_pos < p_output_size) {
+ c = p_compressed_buffer[compressed_pos];
+ compressed_pos += 1;
+ count = (c & 0x7f) + 1;
+
+ if (c & 0x80) {
+ for (int i = 0; i < p_pixel_size; i++) {
+ pixels_w.ptr()[i] = p_compressed_buffer[compressed_pos];
+ compressed_pos += 1;
+ }
+ for (int i = 0; i < count; i++) {
+ for (int j = 0; j < p_pixel_size; j++) {
+ p_uncompressed_buffer[output_pos + j] = pixels_w.ptr()[j];
+ }
+ output_pos += p_pixel_size;
+ }
+ } else {
+ count *= p_pixel_size;
+ for (int i = 0; i < count; i++) {
+ p_uncompressed_buffer[output_pos] = p_compressed_buffer[compressed_pos];
+ compressed_pos += 1;
+ output_pos += 1;
+ }
+ }
+ }
+ return OK;
+}
+
+Error ImageLoaderTGA::convert_to_image(Ref<Image> p_image, const uint8_t *p_buffer, const tga_header_s &p_header, const uint8_t *p_palette, const bool p_is_monochrome) {
+
+#define TGA_PUT_PIXEL(r, g, b, a) \
+ int image_data_ofs = ((y * width) + x); \
+ image_data_w[image_data_ofs * 4 + 0] = r; \
+ image_data_w[image_data_ofs * 4 + 1] = g; \
+ image_data_w[image_data_ofs * 4 + 2] = b; \
+ image_data_w[image_data_ofs * 4 + 3] = a;
+
+ uint32_t width = p_header.image_width;
+ uint32_t height = p_header.image_height;
+ tga_origin_e origin = static_cast<tga_origin_e>((p_header.image_descriptor & TGA_ORIGIN_MASK) >> TGA_ORIGIN_SHIFT);
+
+ uint32_t x_start;
+ int32_t x_step;
+ uint32_t x_end;
+ uint32_t y_start;
+ int32_t y_step;
+ uint32_t y_end;
+
+ if (origin == TGA_ORIGIN_TOP_LEFT || origin == TGA_ORIGIN_TOP_RIGHT) {
+ y_start = 0;
+ y_step = 1;
+ y_end = height;
+ } else {
+ y_start = height - 1;
+ y_step = -1;
+ y_end = -1;
+ }
+
+ if (origin == TGA_ORIGIN_TOP_LEFT || origin == TGA_ORIGIN_BOTTOM_LEFT) {
+ x_start = 0;
+ x_step = 1;
+ x_end = width;
+ } else {
+ x_start = width - 1;
+ x_step = -1;
+ x_end = -1;
+ }
+
+ PoolVector<uint8_t> image_data;
+ image_data.resize(width * height * sizeof(uint32_t));
+ PoolVector<uint8_t>::Write image_data_w = image_data.write();
+
+ size_t i = 0;
+ uint32_t x = x_start;
+ uint32_t y = y_start;
+
+ if (p_header.pixel_depth == 8) {
+ if (p_is_monochrome) {
+ while (y != y_end) {
+ while (x != x_end) {
+ uint8_t shade = p_buffer[i];
+
+ TGA_PUT_PIXEL(shade, shade, shade, 0xff)
+
+ x += x_step;
+ i += 1;
+ }
+ x = x_start;
+ y += y_step;
+ }
+ } else {
+ while (y != y_end) {
+ while (x != x_end) {
+ uint8_t index = p_buffer[i];
+ uint8_t r = 0x00;
+ uint8_t g = 0x00;
+ uint8_t b = 0x00;
+ uint8_t a = 0xff;
+
+ if (p_header.color_map_depth == 24) {
+ r = (p_palette[(index * 3) + 0]);
+ g = (p_palette[(index * 3) + 1]);
+ b = (p_palette[(index * 3) + 2]);
+ } else {
+ return ERR_INVALID_DATA;
+ }
+
+ TGA_PUT_PIXEL(r, g, b, a)
+
+ x += x_step;
+ i += 1;
+ }
+ x = x_start;
+ y += y_step;
+ }
+ }
+ } else if (p_header.pixel_depth == 24) {
+ while (y != y_end) {
+ while (x != x_end) {
+ uint8_t r = p_buffer[i + 2];
+ uint8_t g = p_buffer[i + 1];
+ uint8_t b = p_buffer[i + 0];
+
+ TGA_PUT_PIXEL(r, g, b, 0xff)
+
+ x += x_step;
+ i += 3;
+ }
+ x = x_start;
+ y += y_step;
+ }
+ } else if (p_header.pixel_depth == 32) {
+ while (y != y_end) {
+ while (x != x_end) {
+ uint8_t a = p_buffer[i + 3];
+ uint8_t r = p_buffer[i + 2];
+ uint8_t g = p_buffer[i + 1];
+ uint8_t b = p_buffer[i + 0];
+
+ TGA_PUT_PIXEL(r, g, b, a)
+
+ x += x_step;
+ i += 4;
+ }
+ x = x_start;
+ y += y_step;
+ }
+ }
+
+ image_data_w = PoolVector<uint8_t>::Write();
+
+ p_image->create(width, height, 0, Image::FORMAT_RGBA8, image_data);
+
+ return OK;
+}
+
+Error ImageLoaderTGA::load_image(Ref<Image> p_image, FileAccess *f, bool p_force_linear) {
+
+ PoolVector<uint8_t> src_image;
+ int src_image_len = f->get_len();
+ ERR_FAIL_COND_V(src_image_len == 0, ERR_FILE_CORRUPT);
+ ERR_FAIL_COND_V(src_image_len < sizeof(tga_header_s), ERR_FILE_CORRUPT);
+ src_image.resize(src_image_len);
+
+ Error err = OK;
+
+ tga_header_s tga_header;
+ tga_header.id_length = f->get_8();
+ tga_header.color_map_type = f->get_8();
+ tga_header.image_type = static_cast<tga_type_e>(f->get_8());
+
+ tga_header.first_color_entry = f->get_16();
+ tga_header.color_map_length = f->get_16();
+ tga_header.color_map_depth = f->get_8();
+
+ tga_header.x_origin = f->get_16();
+ tga_header.y_origin = f->get_16();
+ tga_header.image_width = f->get_16();
+ tga_header.image_height = f->get_16();
+ tga_header.pixel_depth = f->get_8();
+ tga_header.image_descriptor = f->get_8();
+
+ bool is_encoded = (tga_header.image_type == TGA_TYPE_RLE_INDEXED || tga_header.image_type == TGA_TYPE_RLE_RGB || tga_header.image_type == TGA_TYPE_RLE_MONOCHROME);
+ bool has_color_map = (tga_header.image_type == TGA_TYPE_RLE_INDEXED || tga_header.image_type == TGA_TYPE_INDEXED);
+ bool is_monochrome = (tga_header.image_type == TGA_TYPE_RLE_MONOCHROME || tga_header.image_type == TGA_TYPE_MONOCHROME);
+
+ if (tga_header.image_type == TGA_TYPE_NO_DATA)
+ err = FAILED;
+
+ if (has_color_map) {
+ if (tga_header.color_map_length > 256 || (tga_header.color_map_depth != 24) || tga_header.color_map_type != 1) {
+ err = FAILED;
+ }
+ } else {
+ if (tga_header.color_map_type) {
+ err = FAILED;
+ }
+ }
+
+ if (tga_header.image_width <= 0 || tga_header.image_height <= 0)
+ err = FAILED;
+
+ if (tga_header.pixel_depth != 8 && tga_header.pixel_depth != 24 && tga_header.pixel_depth != 32)
+ err = FAILED;
+
+ if (err == OK) {
+ f->seek(f->get_pos() + tga_header.id_length);
+
+ PoolVector<uint8_t> palette;
+
+ if (has_color_map) {
+ size_t color_map_size = tga_header.color_map_length * (tga_header.color_map_depth >> 3);
+ err = palette.resize(color_map_size);
+ if (err == OK) {
+ PoolVector<uint8_t>::Write palette_w = palette.write();
+ f->get_buffer(&palette_w[0], color_map_size);
+ } else {
+ return OK;
+ }
+ }
+
+ PoolVector<uint8_t>::Write src_image_w = src_image.write();
+ f->get_buffer(&src_image_w[0], src_image_len - f->get_pos());
+
+ PoolVector<uint8_t>::Read src_image_r = src_image.read();
+
+ const size_t pixel_size = tga_header.pixel_depth >> 3;
+ const size_t buffer_size = (tga_header.image_width * tga_header.image_height) * pixel_size;
+
+ PoolVector<uint8_t> uncompressed_buffer;
+ uncompressed_buffer.resize(buffer_size);
+ PoolVector<uint8_t>::Write uncompressed_buffer_w = uncompressed_buffer.write();
+ PoolVector<uint8_t>::Read uncompressed_buffer_r;
+
+ const uint8_t *buffer = NULL;
+
+ if (is_encoded) {
+
+ err = decode_tga_rle(src_image_r.ptr(), pixel_size, uncompressed_buffer_w.ptr(), buffer_size);
+
+ if (err == OK) {
+ uncompressed_buffer_r = uncompressed_buffer.read();
+ buffer = uncompressed_buffer_r.ptr();
+ }
+ } else {
+ buffer = src_image_r.ptr();
+ };
+
+ if (err == OK) {
+ PoolVector<uint8_t>::Read palette_r = palette.read();
+ err = convert_to_image(p_image, buffer, tga_header, palette_r.ptr(), is_monochrome);
+ }
+ }
+
+ f->close();
+ return err;
+}
+
+void ImageLoaderTGA::get_recognized_extensions(List<String> *p_extensions) const {
+
+ p_extensions->push_back("tga");
+}
+
+ImageLoaderTGA::ImageLoaderTGA() {
+}
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