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diff --git a/modules/etc/image_compress_etc.cpp b/modules/etc/image_compress_etc.cpp
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-/*************************************************************************/
-/* image_compress_etc.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_compress_etc.h"
-
-#include "core/io/image.h"
-#include "core/os/copymem.h"
-#include "core/os/os.h"
-#include "core/string/print_string.h"
-
-#include <Etc.h>
-#include <EtcFilter.h>
-
-static Image::Format _get_etc2_mode(Image::UsedChannels format) {
- switch (format) {
- case Image::USED_CHANNELS_R:
- return Image::FORMAT_ETC2_R11;
-
- case Image::USED_CHANNELS_RG:
- return Image::FORMAT_ETC2_RG11;
-
- case Image::USED_CHANNELS_RGB:
- return Image::FORMAT_ETC2_RGB8;
-
- case Image::USED_CHANNELS_RGBA:
- return Image::FORMAT_ETC2_RGBA8;
-
- // TODO: would be nice if we could use FORMAT_ETC2_RGB8A1 for FORMAT_RGBA5551
- default:
- // TODO: Kept for compatibility, but should be investigated whether it's correct or if it should error out
- return Image::FORMAT_ETC2_RGBA8;
- }
-}
-
-static Etc::Image::Format _image_format_to_etc2comp_format(Image::Format format) {
- switch (format) {
- case Image::FORMAT_ETC:
- return Etc::Image::Format::ETC1;
-
- case Image::FORMAT_ETC2_R11:
- return Etc::Image::Format::R11;
-
- case Image::FORMAT_ETC2_R11S:
- return Etc::Image::Format::SIGNED_R11;
-
- case Image::FORMAT_ETC2_RG11:
- return Etc::Image::Format::RG11;
-
- case Image::FORMAT_ETC2_RG11S:
- return Etc::Image::Format::SIGNED_RG11;
-
- case Image::FORMAT_ETC2_RGB8:
- return Etc::Image::Format::RGB8;
-
- case Image::FORMAT_ETC2_RGBA8:
- return Etc::Image::Format::RGBA8;
-
- case Image::FORMAT_ETC2_RGB8A1:
- return Etc::Image::Format::RGB8A1;
-
- default:
- ERR_FAIL_V(Etc::Image::Format::UNKNOWN);
- }
-}
-
-static void _compress_etc(Image *p_img, float p_lossy_quality, bool force_etc1_format, Image::UsedChannels p_channels) {
- Image::Format img_format = p_img->get_format();
-
- if (img_format >= Image::FORMAT_DXT1) {
- return; //do not compress, already compressed
- }
-
- if (img_format > Image::FORMAT_RGBA8) {
- // TODO: we should be able to handle FORMAT_RGBA4444 and FORMAT_RGBA5551 eventually
- return;
- }
-
- // FIXME: Commented out during Vulkan rebase.
- /*
- if (force_etc1_format) {
- // If VRAM compression is using ETC, but image has alpha, convert to RGBA4444 or LA8
- // This saves space while maintaining the alpha channel
- if (detected_channels == Image::USED_CHANNELS_RGBA) {
- if (p_img->has_mipmaps()) {
- // Image doesn't support mipmaps with RGBA4444 textures
- p_img->clear_mipmaps();
- }
- p_img->convert(Image::FORMAT_RGBA4444);
- return;
- } else if (detected_channels == Image::USE_CHANNELS_LA) {
- p_img->convert(Image::FORMAT_LA8);
- return;
- }
- }
- */
-
- uint32_t imgw = p_img->get_width(), imgh = p_img->get_height();
-
- Image::Format etc_format = force_etc1_format ? Image::FORMAT_ETC : _get_etc2_mode(p_channels);
-
- Ref<Image> img = p_img->duplicate();
-
- if (img->get_format() != Image::FORMAT_RGBA8) {
- img->convert(Image::FORMAT_RGBA8); //still uses RGBA to convert
- }
-
- if (img->has_mipmaps()) {
- if (next_power_of_2(imgw) != imgw || next_power_of_2(imgh) != imgh) {
- img->resize_to_po2();
- imgw = img->get_width();
- imgh = img->get_height();
- }
- } else {
- if (imgw % 4 != 0 || imgh % 4 != 0) {
- if (imgw % 4) {
- imgw += 4 - imgw % 4;
- }
- if (imgh % 4) {
- imgh += 4 - imgh % 4;
- }
-
- img->resize(imgw, imgh);
- }
- }
-
- const uint8_t *r = img->get_data().ptr();
- ERR_FAIL_COND(!r);
-
- unsigned int target_size = Image::get_image_data_size(imgw, imgh, etc_format, p_img->has_mipmaps());
- int mmc = 1 + (p_img->has_mipmaps() ? Image::get_image_required_mipmaps(imgw, imgh, etc_format) : 0);
-
- Vector<uint8_t> dst_data;
- dst_data.resize(target_size);
-
- uint8_t *w = dst_data.ptrw();
-
- // prepare parameters to be passed to etc2comp
- int num_cpus = OS::get_singleton()->get_processor_count();
- int encoding_time = 0;
- float effort = 0.0; //default, reasonable time
-
- if (p_lossy_quality > 0.95) {
- effort = 80;
- } else if (p_lossy_quality > 0.85) {
- effort = 60;
- } else if (p_lossy_quality > 0.75) {
- effort = 40;
- }
-
- Etc::ErrorMetric error_metric = Etc::ErrorMetric::RGBX; // NOTE: we can experiment with other error metrics
- Etc::Image::Format etc2comp_etc_format = _image_format_to_etc2comp_format(etc_format);
-
- int wofs = 0;
-
- print_verbose("ETC: Begin encoding, format: " + Image::get_format_name(etc_format));
- uint64_t t = OS::get_singleton()->get_ticks_msec();
- for (int i = 0; i < mmc; i++) {
- // convert source image to internal etc2comp format (which is equivalent to Image::FORMAT_RGBAF)
- // NOTE: We can alternatively add a case to Image::convert to handle Image::FORMAT_RGBAF conversion.
- int mipmap_ofs = 0, mipmap_size = 0, mipmap_w = 0, mipmap_h = 0;
- img->get_mipmap_offset_size_and_dimensions(i, mipmap_ofs, mipmap_size, mipmap_w, mipmap_h);
- const uint8_t *src = &r[mipmap_ofs];
-
- Etc::ColorFloatRGBA *src_rgba_f = new Etc::ColorFloatRGBA[mipmap_w * mipmap_h];
- for (int j = 0; j < mipmap_w * mipmap_h; j++) {
- int si = j * 4; // RGBA8
- src_rgba_f[j] = Etc::ColorFloatRGBA::ConvertFromRGBA8(src[si], src[si + 1], src[si + 2], src[si + 3]);
- }
-
- unsigned char *etc_data = nullptr;
- unsigned int etc_data_len = 0;
- unsigned int extended_width = 0, extended_height = 0;
- Etc::Encode((float *)src_rgba_f, mipmap_w, mipmap_h, etc2comp_etc_format, error_metric, effort, num_cpus, num_cpus, &etc_data, &etc_data_len, &extended_width, &extended_height, &encoding_time);
-
- CRASH_COND(wofs + etc_data_len > target_size);
- memcpy(&w[wofs], etc_data, etc_data_len);
- wofs += etc_data_len;
-
- delete[] etc_data;
- delete[] src_rgba_f;
- }
-
- print_verbose("ETC: Time encoding: " + rtos(OS::get_singleton()->get_ticks_msec() - t));
-
- p_img->create(imgw, imgh, p_img->has_mipmaps(), etc_format, dst_data);
-}
-
-static void _compress_etc1(Image *p_img, float p_lossy_quality) {
- _compress_etc(p_img, p_lossy_quality, true, Image::USED_CHANNELS_RGB);
-}
-
-static void _compress_etc2(Image *p_img, float p_lossy_quality, Image::UsedChannels p_channels) {
- _compress_etc(p_img, p_lossy_quality, false, p_channels);
-}
-
-void _register_etc_compress_func() {
- Image::_image_compress_etc1_func = _compress_etc1;
- Image::_image_compress_etc2_func = _compress_etc2;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 01:21:30 +0000