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d95794ec8a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see".
297 lines
9.6 KiB
C++
297 lines
9.6 KiB
C++
/**************************************************************************/
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/* image_loader_tinyexr.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 "image_loader_tinyexr.h"
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#include "core/os/os.h"
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#include "core/string/print_string.h"
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#include <zlib.h> // Should come before including tinyexr.
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#include "thirdparty/tinyexr/tinyexr.h"
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Error ImageLoaderTinyEXR::load_image(Ref<Image> p_image, Ref<FileAccess> f, BitField<ImageFormatLoader::LoaderFlags> p_flags, float p_scale) {
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Vector<uint8_t> src_image;
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uint64_t src_image_len = f->get_length();
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ERR_FAIL_COND_V(src_image_len == 0, ERR_FILE_CORRUPT);
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src_image.resize(src_image_len);
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uint8_t *w = src_image.ptrw();
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f->get_buffer(&w[0], src_image_len);
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// Re-implementation of tinyexr's LoadEXRFromMemory using Godot types to store the Image data
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// and Godot's error codes.
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// When debugging after updating the thirdparty library, check that we're still in sync with
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// their API usage in LoadEXRFromMemory.
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EXRVersion exr_version;
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EXRImage exr_image;
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EXRHeader exr_header;
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const char *err = nullptr;
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InitEXRHeader(&exr_header);
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int ret = ParseEXRVersionFromMemory(&exr_version, w, src_image_len);
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if (ret != TINYEXR_SUCCESS) {
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return ERR_FILE_CORRUPT;
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}
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ret = ParseEXRHeaderFromMemory(&exr_header, &exr_version, w, src_image_len, &err);
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if (ret != TINYEXR_SUCCESS) {
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if (err) {
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ERR_PRINT(String(err));
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}
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return ERR_FILE_CORRUPT;
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}
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// Read HALF channel as FLOAT. (GH-13490)
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bool use_float16 = false;
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for (int i = 0; i < exr_header.num_channels; i++) {
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if (exr_header.pixel_types[i] == TINYEXR_PIXELTYPE_HALF) {
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use_float16 = true;
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exr_header.requested_pixel_types[i] = TINYEXR_PIXELTYPE_FLOAT;
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}
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}
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InitEXRImage(&exr_image);
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ret = LoadEXRImageFromMemory(&exr_image, &exr_header, w, src_image_len, &err);
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if (ret != TINYEXR_SUCCESS) {
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if (err) {
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ERR_PRINT(String(err));
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}
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return ERR_FILE_CORRUPT;
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}
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// RGBA
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int idxR = -1;
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int idxG = -1;
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int idxB = -1;
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int idxA = -1;
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for (int c = 0; c < exr_header.num_channels; c++) {
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if (strcmp(exr_header.channels[c].name, "R") == 0) {
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idxR = c;
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} else if (strcmp(exr_header.channels[c].name, "G") == 0) {
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idxG = c;
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} else if (strcmp(exr_header.channels[c].name, "B") == 0) {
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idxB = c;
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} else if (strcmp(exr_header.channels[c].name, "A") == 0) {
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idxA = c;
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} else if (strcmp(exr_header.channels[c].name, "Y") == 0) {
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idxR = c;
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idxG = c;
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idxB = c;
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}
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}
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// EXR image data loaded, now parse it into Godot-friendly image data
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Vector<uint8_t> imgdata;
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Image::Format format;
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int output_channels = 0;
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int channel_size = use_float16 ? 2 : 4;
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if (idxA != -1) {
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imgdata.resize(exr_image.width * exr_image.height * 4 * channel_size); //RGBA
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format = use_float16 ? Image::FORMAT_RGBAH : Image::FORMAT_RGBAF;
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output_channels = 4;
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} else if (idxB != -1) {
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ERR_FAIL_COND_V(idxG == -1, ERR_FILE_CORRUPT);
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ERR_FAIL_COND_V(idxR == -1, ERR_FILE_CORRUPT);
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imgdata.resize(exr_image.width * exr_image.height * 3 * channel_size); //RGB
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format = use_float16 ? Image::FORMAT_RGBH : Image::FORMAT_RGBF;
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output_channels = 3;
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} else if (idxG != -1) {
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ERR_FAIL_COND_V(idxR == -1, ERR_FILE_CORRUPT);
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imgdata.resize(exr_image.width * exr_image.height * 2 * channel_size); //RG
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format = use_float16 ? Image::FORMAT_RGH : Image::FORMAT_RGF;
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output_channels = 2;
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} else {
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ERR_FAIL_COND_V(idxR == -1, ERR_FILE_CORRUPT);
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imgdata.resize(exr_image.width * exr_image.height * 1 * channel_size); //R
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format = use_float16 ? Image::FORMAT_RH : Image::FORMAT_RF;
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output_channels = 1;
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}
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EXRTile single_image_tile;
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int num_tiles;
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int tile_width = 0;
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int tile_height = 0;
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const EXRTile *exr_tiles;
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if (!exr_header.tiled) {
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single_image_tile.images = exr_image.images;
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single_image_tile.width = exr_image.width;
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single_image_tile.height = exr_image.height;
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single_image_tile.level_x = exr_image.width;
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single_image_tile.level_y = exr_image.height;
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single_image_tile.offset_x = 0;
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single_image_tile.offset_y = 0;
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exr_tiles = &single_image_tile;
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num_tiles = 1;
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tile_width = exr_image.width;
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tile_height = exr_image.height;
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} else {
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tile_width = exr_header.tile_size_x;
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tile_height = exr_header.tile_size_y;
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num_tiles = exr_image.num_tiles;
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exr_tiles = exr_image.tiles;
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}
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//print_line("reading format: " + Image::get_format_name(format));
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{
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uint8_t *wd = imgdata.ptrw();
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uint16_t *iw16 = (uint16_t *)wd;
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float *iw32 = (float *)wd;
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// Assume `out_rgba` have enough memory allocated.
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for (int tile_index = 0; tile_index < num_tiles; tile_index++) {
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const EXRTile &tile = exr_tiles[tile_index];
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int tw = tile.width;
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int th = tile.height;
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const float *r_channel_start = reinterpret_cast<const float *>(tile.images[idxR]);
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const float *g_channel_start = nullptr;
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const float *b_channel_start = nullptr;
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const float *a_channel_start = nullptr;
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if (idxG != -1) {
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g_channel_start = reinterpret_cast<const float *>(tile.images[idxG]);
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}
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if (idxB != -1) {
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b_channel_start = reinterpret_cast<const float *>(tile.images[idxB]);
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}
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if (idxA != -1) {
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a_channel_start = reinterpret_cast<const float *>(tile.images[idxA]);
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}
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uint16_t *first_row_w16 = iw16 + (tile.offset_y * tile_height * exr_image.width + tile.offset_x * tile_width) * output_channels;
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float *first_row_w32 = iw32 + (tile.offset_y * tile_height * exr_image.width + tile.offset_x * tile_width) * output_channels;
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for (int y = 0; y < th; y++) {
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const float *r_channel = r_channel_start + y * tile_width;
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const float *g_channel = nullptr;
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const float *b_channel = nullptr;
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const float *a_channel = nullptr;
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if (g_channel_start) {
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g_channel = g_channel_start + y * tile_width;
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}
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if (b_channel_start) {
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b_channel = b_channel_start + y * tile_width;
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}
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if (a_channel_start) {
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a_channel = a_channel_start + y * tile_width;
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}
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if (use_float16) {
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uint16_t *row_w = first_row_w16 + (y * exr_image.width * output_channels);
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for (int x = 0; x < tw; x++) {
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Color color;
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color.r = *r_channel++;
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if (g_channel) {
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color.g = *g_channel++;
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}
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if (b_channel) {
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color.b = *b_channel++;
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}
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if (a_channel) {
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color.a = *a_channel++;
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}
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if (p_flags & FLAG_FORCE_LINEAR) {
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color = color.srgb_to_linear();
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}
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*row_w++ = Math::make_half_float(color.r);
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if (g_channel) {
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*row_w++ = Math::make_half_float(color.g);
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}
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if (b_channel) {
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*row_w++ = Math::make_half_float(color.b);
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}
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if (a_channel) {
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*row_w++ = Math::make_half_float(color.a);
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}
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}
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} else {
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float *row_w = first_row_w32 + (y * exr_image.width * output_channels);
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for (int x = 0; x < tw; x++) {
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Color color;
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color.r = *r_channel++;
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if (g_channel) {
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color.g = *g_channel++;
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}
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if (b_channel) {
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color.b = *b_channel++;
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}
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if (a_channel) {
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color.a = *a_channel++;
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}
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if (p_flags & FLAG_FORCE_LINEAR) {
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color = color.srgb_to_linear();
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}
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*row_w++ = color.r;
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if (g_channel) {
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*row_w++ = color.g;
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}
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if (b_channel) {
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*row_w++ = color.b;
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}
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if (a_channel) {
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*row_w++ = color.a;
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}
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}
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}
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}
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}
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}
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p_image->set_data(exr_image.width, exr_image.height, false, format, imgdata);
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FreeEXRHeader(&exr_header);
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FreeEXRImage(&exr_image);
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return OK;
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}
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void ImageLoaderTinyEXR::get_recognized_extensions(List<String> *p_extensions) const {
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p_extensions->push_back("exr");
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}
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ImageLoaderTinyEXR::ImageLoaderTinyEXR() {
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}
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