mirror of
https://github.com/godotengine/godot
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183 lines
6.9 KiB
C++
183 lines
6.9 KiB
C++
/**************************************************************************/
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/* webp_common.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "webp_common.h"
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#include "core/config/project_settings.h"
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#include "core/os/os.h"
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#include <webp/decode.h>
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#include <webp/encode.h>
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#include <string.h>
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namespace WebPCommon {
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Vector<uint8_t> _webp_lossy_pack(const Ref<Image> &p_image, float p_quality) {
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ERR_FAIL_COND_V(p_image.is_null() || p_image->is_empty(), Vector<uint8_t>());
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return _webp_packer(p_image, CLAMP(p_quality * 100.0f, 0.0f, 100.0f), false);
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}
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Vector<uint8_t> _webp_lossless_pack(const Ref<Image> &p_image) {
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ERR_FAIL_COND_V(p_image.is_null() || p_image->is_empty(), Vector<uint8_t>());
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float compression_factor = GLOBAL_GET("rendering/textures/webp_compression/lossless_compression_factor");
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compression_factor = CLAMP(compression_factor, 0.0f, 100.0f);
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return _webp_packer(p_image, compression_factor, true);
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}
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Vector<uint8_t> _webp_packer(const Ref<Image> &p_image, float p_quality, bool p_lossless) {
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int compression_method = GLOBAL_GET("rendering/textures/webp_compression/compression_method");
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compression_method = CLAMP(compression_method, 0, 6);
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Ref<Image> img = p_image->duplicate();
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if (img->is_compressed()) {
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Error error = img->decompress();
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ERR_FAIL_COND_V_MSG(error != OK, Vector<uint8_t>(), "Couldn't decompress image.");
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}
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if (img->detect_alpha()) {
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img->convert(Image::FORMAT_RGBA8);
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} else {
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img->convert(Image::FORMAT_RGB8);
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}
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Size2 s(img->get_width(), img->get_height());
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Vector<uint8_t> data = img->get_data();
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const uint8_t *r = data.ptr();
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// we need to use the more complex API in order to access specific flags...
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WebPConfig config;
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WebPPicture pic;
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if (!WebPConfigInit(&config) || !WebPPictureInit(&pic)) {
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ERR_FAIL_V(Vector<uint8_t>());
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}
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WebPMemoryWriter wrt;
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if (p_lossless) {
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config.lossless = 1;
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config.exact = 1;
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}
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config.method = compression_method;
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config.quality = p_quality;
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config.use_sharp_yuv = 1;
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pic.use_argb = 1;
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pic.width = s.width;
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pic.height = s.height;
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pic.writer = WebPMemoryWrite;
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pic.custom_ptr = &wrt;
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WebPMemoryWriterInit(&wrt);
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bool success_import = false;
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if (img->get_format() == Image::FORMAT_RGB8) {
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success_import = WebPPictureImportRGB(&pic, r, 3 * s.width);
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} else {
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success_import = WebPPictureImportRGBA(&pic, r, 4 * s.width);
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}
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bool success_encode = false;
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if (success_import) {
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success_encode = WebPEncode(&config, &pic);
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}
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WebPPictureFree(&pic);
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if (!success_encode) {
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WebPMemoryWriterClear(&wrt);
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ERR_FAIL_V_MSG(Vector<uint8_t>(), "WebP packing failed.");
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}
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// copy from wrt
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Vector<uint8_t> dst;
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dst.resize(wrt.size);
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uint8_t *w = dst.ptrw();
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memcpy(w, wrt.mem, wrt.size);
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WebPMemoryWriterClear(&wrt);
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return dst;
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}
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Ref<Image> _webp_unpack(const Vector<uint8_t> &p_buffer) {
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int size = p_buffer.size();
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ERR_FAIL_COND_V(size <= 0, Ref<Image>());
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const uint8_t *r = p_buffer.ptr();
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// A WebP file uses a RIFF header, which starts with "RIFF____WEBP".
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ERR_FAIL_COND_V(r[0] != 'R' || r[1] != 'I' || r[2] != 'F' || r[3] != 'F' || r[8] != 'W' || r[9] != 'E' || r[10] != 'B' || r[11] != 'P', Ref<Image>());
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WebPBitstreamFeatures features;
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if (WebPGetFeatures(r, size, &features) != VP8_STATUS_OK) {
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ERR_FAIL_V_MSG(Ref<Image>(), "Error unpacking WebP image.");
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}
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Vector<uint8_t> dst_image;
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int datasize = features.width * features.height * (features.has_alpha ? 4 : 3);
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dst_image.resize(datasize);
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uint8_t *dst_w = dst_image.ptrw();
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bool errdec = false;
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if (features.has_alpha) {
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errdec = WebPDecodeRGBAInto(r, size, dst_w, datasize, 4 * features.width) == nullptr;
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} else {
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errdec = WebPDecodeRGBInto(r, size, dst_w, datasize, 3 * features.width) == nullptr;
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}
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ERR_FAIL_COND_V_MSG(errdec, Ref<Image>(), "Failed decoding WebP image.");
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Ref<Image> img = memnew(Image(features.width, features.height, 0, features.has_alpha ? Image::FORMAT_RGBA8 : Image::FORMAT_RGB8, dst_image));
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return img;
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}
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Error webp_load_image_from_buffer(Image *p_image, const uint8_t *p_buffer, int p_buffer_len) {
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ERR_FAIL_NULL_V(p_image, ERR_INVALID_PARAMETER);
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WebPBitstreamFeatures features;
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if (WebPGetFeatures(p_buffer, p_buffer_len, &features) != VP8_STATUS_OK) {
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ERR_FAIL_V(ERR_FILE_CORRUPT);
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}
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Vector<uint8_t> dst_image;
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int datasize = features.width * features.height * (features.has_alpha ? 4 : 3);
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dst_image.resize(datasize);
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uint8_t *dst_w = dst_image.ptrw();
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bool errdec = false;
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if (features.has_alpha) {
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errdec = WebPDecodeRGBAInto(p_buffer, p_buffer_len, dst_w, datasize, 4 * features.width) == nullptr;
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} else {
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errdec = WebPDecodeRGBInto(p_buffer, p_buffer_len, dst_w, datasize, 3 * features.width) == nullptr;
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}
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ERR_FAIL_COND_V_MSG(errdec, ERR_FILE_CORRUPT, "Failed decoding WebP image.");
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p_image->set_data(features.width, features.height, false, features.has_alpha ? Image::FORMAT_RGBA8 : Image::FORMAT_RGB8, dst_image);
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return OK;
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}
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} // namespace WebPCommon
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