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godot/modules/webp/image_loader_webp.cpp

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/*************************************************************************/
/* image_loader_webp.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_loader_webp.h"
#include "core/config/project_settings.h"
#include "core/io/marshalls.h"
#include "core/os/os.h"
#include "core/string/print_string.h"
#include <stdlib.h>
#include <webp/decode.h>
#include <webp/encode.h>
static Vector<uint8_t> _webp_lossy_pack(const Ref<Image> &p_image, float p_quality) {
ERR_FAIL_COND_V(p_image.is_null() || p_image->is_empty(), Vector<uint8_t>());
Ref<Image> img = p_image->duplicate();
if (img->detect_alpha()) {
img->convert(Image::FORMAT_RGBA8);
} else {
img->convert(Image::FORMAT_RGB8);
}
Size2 s(img->get_width(), img->get_height());
Vector<uint8_t> data = img->get_data();
const uint8_t *r = data.ptr();
uint8_t *dst_buff = nullptr;
size_t dst_size = 0;
if (img->get_format() == Image::FORMAT_RGB8) {
dst_size = WebPEncodeRGB(r, s.width, s.height, 3 * s.width, CLAMP(p_quality * 100.0, 0, 100.0), &dst_buff);
} else {
dst_size = WebPEncodeRGBA(r, s.width, s.height, 4 * s.width, CLAMP(p_quality * 100.0, 0, 100.0), &dst_buff);
}
ERR_FAIL_COND_V(dst_size == 0, Vector<uint8_t>());
Vector<uint8_t> dst;
dst.resize(4 + dst_size);
uint8_t *w = dst.ptrw();
w[0] = 'W';
w[1] = 'E';
w[2] = 'B';
w[3] = 'P';
memcpy(&w[4], dst_buff, dst_size);
WebPFree(dst_buff);
return dst;
}
static Vector<uint8_t> _webp_lossless_pack(const Ref<Image> &p_image) {
ERR_FAIL_COND_V(p_image.is_null() || p_image->is_empty(), Vector<uint8_t>());
int compression_level = ProjectSettings::get_singleton()->get("rendering/textures/lossless_compression/webp_compression_level");
compression_level = CLAMP(compression_level, 0, 9);
Ref<Image> img = p_image->duplicate();
if (img->detect_alpha()) {
img->convert(Image::FORMAT_RGBA8);
} else {
img->convert(Image::FORMAT_RGB8);
}
Size2 s(img->get_width(), img->get_height());
Vector<uint8_t> data = img->get_data();
const uint8_t *r = data.ptr();
// we need to use the more complex API in order to access the 'exact' flag...
WebPConfig config;
WebPPicture pic;
if (!WebPConfigInit(&config) || !WebPConfigLosslessPreset(&config, compression_level) || !WebPPictureInit(&pic)) {
ERR_FAIL_V(Vector<uint8_t>());
}
WebPMemoryWriter wrt;
config.exact = 1;
pic.use_argb = 1;
pic.width = s.width;
pic.height = s.height;
pic.writer = WebPMemoryWrite;
pic.custom_ptr = &wrt;
WebPMemoryWriterInit(&wrt);
bool success_import = false;
if (img->get_format() == Image::FORMAT_RGB8) {
success_import = WebPPictureImportRGB(&pic, r, 3 * s.width);
} else {
success_import = WebPPictureImportRGBA(&pic, r, 4 * s.width);
}
bool success_encode = false;
if (success_import) {
success_encode = WebPEncode(&config, &pic);
}
WebPPictureFree(&pic);
if (!success_encode) {
WebPMemoryWriterClear(&wrt);
ERR_FAIL_V_MSG(Vector<uint8_t>(), "WebP packing failed.");
}
// copy from wrt
Vector<uint8_t> dst;
dst.resize(4 + wrt.size);
uint8_t *w = dst.ptrw();
w[0] = 'W';
w[1] = 'E';
w[2] = 'B';
w[3] = 'P';
memcpy(&w[4], wrt.mem, wrt.size);
WebPMemoryWriterClear(&wrt);
return dst;
}
static Ref<Image> _webp_unpack(const Vector<uint8_t> &p_buffer) {
int size = p_buffer.size() - 4;
ERR_FAIL_COND_V(size <= 0, Ref<Image>());
const uint8_t *r = p_buffer.ptr();
ERR_FAIL_COND_V(r[0] != 'W' || r[1] != 'E' || r[2] != 'B' || r[3] != 'P', Ref<Image>());
WebPBitstreamFeatures features;
if (WebPGetFeatures(&r[4], size, &features) != VP8_STATUS_OK) {
ERR_FAIL_V_MSG(Ref<Image>(), "Error unpacking WEBP image.");
}
/*
print_line("width: "+itos(features.width));
print_line("height: "+itos(features.height));
print_line("alpha: "+itos(features.has_alpha));
*/
Vector<uint8_t> dst_image;
int datasize = features.width * features.height * (features.has_alpha ? 4 : 3);
dst_image.resize(datasize);
uint8_t *dst_w = dst_image.ptrw();
bool errdec = false;
if (features.has_alpha) {
errdec = WebPDecodeRGBAInto(&r[4], size, dst_w, datasize, 4 * features.width) == nullptr;
} else {
errdec = WebPDecodeRGBInto(&r[4], size, dst_w, datasize, 3 * features.width) == nullptr;
}
ERR_FAIL_COND_V_MSG(errdec, Ref<Image>(), "Failed decoding WebP image.");
Ref<Image> img = memnew(Image(features.width, features.height, 0, features.has_alpha ? Image::FORMAT_RGBA8 : Image::FORMAT_RGB8, dst_image));
return img;
}
Error webp_load_image_from_buffer(Image *p_image, const uint8_t *p_buffer, int p_buffer_len) {
ERR_FAIL_NULL_V(p_image, ERR_INVALID_PARAMETER);
WebPBitstreamFeatures features;
if (WebPGetFeatures(p_buffer, p_buffer_len, &features) != VP8_STATUS_OK) {
ERR_FAIL_V(ERR_FILE_CORRUPT);
}
Vector<uint8_t> dst_image;
int datasize = features.width * features.height * (features.has_alpha ? 4 : 3);
dst_image.resize(datasize);
uint8_t *dst_w = dst_image.ptrw();
bool errdec = false;
if (features.has_alpha) {
errdec = WebPDecodeRGBAInto(p_buffer, p_buffer_len, dst_w, datasize, 4 * features.width) == nullptr;
} else {
errdec = WebPDecodeRGBInto(p_buffer, p_buffer_len, dst_w, datasize, 3 * features.width) == nullptr;
}
ERR_FAIL_COND_V_MSG(errdec, ERR_FILE_CORRUPT, "Failed decoding WebP image.");
p_image->create(features.width, features.height, false, features.has_alpha ? Image::FORMAT_RGBA8 : Image::FORMAT_RGB8, dst_image);
return OK;
}
static Ref<Image> _webp_mem_loader_func(const uint8_t *p_png, int p_size) {
Ref<Image> img;
img.instantiate();
Error err = webp_load_image_from_buffer(img.ptr(), p_png, p_size);
ERR_FAIL_COND_V(err, Ref<Image>());
return img;
}
Error ImageLoaderWEBP::load_image(Ref<Image> p_image, FileAccess *f, bool p_force_linear, float p_scale) {
Vector<uint8_t> src_image;
uint64_t src_image_len = f->get_length();
ERR_FAIL_COND_V(src_image_len == 0, ERR_FILE_CORRUPT);
src_image.resize(src_image_len);
uint8_t *w = src_image.ptrw();
f->get_buffer(&w[0], src_image_len);
f->close();
Error err = webp_load_image_from_buffer(p_image.ptr(), w, src_image_len);
return err;
}
void ImageLoaderWEBP::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("webp");
}
ImageLoaderWEBP::ImageLoaderWEBP() {
Image::_webp_mem_loader_func = _webp_mem_loader_func;
Image::webp_lossy_packer = _webp_lossy_pack;
Image::webp_lossless_packer = _webp_lossless_pack;
Image::webp_unpacker = _webp_unpack;
}
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