/**************************************************************************/ /* image_loader_tinyexr.cpp */ /**************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /**************************************************************************/ /* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */ /* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ /* */ /* 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_tinyexr.h" #include "core/os/os.h" #include "core/string/print_string.h" #include <zlib.h> // Should come before including tinyexr. #include "thirdparty/tinyexr/tinyexr.h" Error ImageLoaderTinyEXR::load_image(Ref<Image> p_image, Ref<FileAccess> f, BitField<ImageFormatLoader::LoaderFlags> p_flags, 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); // Re-implementation of tinyexr's LoadEXRFromMemory using Godot types to store the Image data // and Godot's error codes. // When debugging after updating the thirdparty library, check that we're still in sync with // their API usage in LoadEXRFromMemory. EXRVersion exr_version; EXRImage exr_image; EXRHeader exr_header; const char *err = nullptr; InitEXRHeader(&exr_header); int ret = ParseEXRVersionFromMemory(&exr_version, w, src_image_len); if (ret != TINYEXR_SUCCESS) { return ERR_FILE_CORRUPT; } ret = ParseEXRHeaderFromMemory(&exr_header, &exr_version, w, src_image_len, &err); if (ret != TINYEXR_SUCCESS) { if (err) { ERR_PRINT(String(err)); } return ERR_FILE_CORRUPT; } // Read HALF channel as FLOAT. (GH-13490) bool use_float16 = false; for (int i = 0; i < exr_header.num_channels; i++) { if (exr_header.pixel_types[i] == TINYEXR_PIXELTYPE_HALF) { use_float16 = true; exr_header.requested_pixel_types[i] = TINYEXR_PIXELTYPE_FLOAT; } } InitEXRImage(&exr_image); ret = LoadEXRImageFromMemory(&exr_image, &exr_header, w, src_image_len, &err); if (ret != TINYEXR_SUCCESS) { if (err) { ERR_PRINT(String(err)); } return ERR_FILE_CORRUPT; } // RGBA int idxR = -1; int idxG = -1; int idxB = -1; int idxA = -1; for (int c = 0; c < exr_header.num_channels; c++) { if (strcmp(exr_header.channels[c].name, "R") == 0) { idxR = c; } else if (strcmp(exr_header.channels[c].name, "G") == 0) { idxG = c; } else if (strcmp(exr_header.channels[c].name, "B") == 0) { idxB = c; } else if (strcmp(exr_header.channels[c].name, "A") == 0) { idxA = c; } else if (strcmp(exr_header.channels[c].name, "Y") == 0) { idxR = c; idxG = c; idxB = c; } } // EXR image data loaded, now parse it into Godot-friendly image data Vector<uint8_t> imgdata; Image::Format format; int output_channels = 0; int channel_size = use_float16 ? 2 : 4; if (idxA != -1) { imgdata.resize(exr_image.width * exr_image.height * 4 * channel_size); //RGBA format = use_float16 ? Image::FORMAT_RGBAH : Image::FORMAT_RGBAF; output_channels = 4; } else if (idxB != -1) { ERR_FAIL_COND_V(idxG == -1, ERR_FILE_CORRUPT); ERR_FAIL_COND_V(idxR == -1, ERR_FILE_CORRUPT); imgdata.resize(exr_image.width * exr_image.height * 3 * channel_size); //RGB format = use_float16 ? Image::FORMAT_RGBH : Image::FORMAT_RGBF; output_channels = 3; } else if (idxG != -1) { ERR_FAIL_COND_V(idxR == -1, ERR_FILE_CORRUPT); imgdata.resize(exr_image.width * exr_image.height * 2 * channel_size); //RG format = use_float16 ? Image::FORMAT_RGH : Image::FORMAT_RGF; output_channels = 2; } else { ERR_FAIL_COND_V(idxR == -1, ERR_FILE_CORRUPT); imgdata.resize(exr_image.width * exr_image.height * 1 * channel_size); //R format = use_float16 ? Image::FORMAT_RH : Image::FORMAT_RF; output_channels = 1; } EXRTile single_image_tile; int num_tiles; int tile_width = 0; int tile_height = 0; const EXRTile *exr_tiles; if (!exr_header.tiled) { single_image_tile.images = exr_image.images; single_image_tile.width = exr_image.width; single_image_tile.height = exr_image.height; single_image_tile.level_x = exr_image.width; single_image_tile.level_y = exr_image.height; single_image_tile.offset_x = 0; single_image_tile.offset_y = 0; exr_tiles = &single_image_tile; num_tiles = 1; tile_width = exr_image.width; tile_height = exr_image.height; } else { tile_width = exr_header.tile_size_x; tile_height = exr_header.tile_size_y; num_tiles = exr_image.num_tiles; exr_tiles = exr_image.tiles; } //print_line("reading format: " + Image::get_format_name(format)); { uint8_t *wd = imgdata.ptrw(); uint16_t *iw16 = (uint16_t *)wd; float *iw32 = (float *)wd; // Assume `out_rgba` have enough memory allocated. for (int tile_index = 0; tile_index < num_tiles; tile_index++) { const EXRTile &tile = exr_tiles[tile_index]; int tw = tile.width; int th = tile.height; const float *r_channel_start = reinterpret_cast<const float *>(tile.images[idxR]); const float *g_channel_start = nullptr; const float *b_channel_start = nullptr; const float *a_channel_start = nullptr; if (idxG != -1) { g_channel_start = reinterpret_cast<const float *>(tile.images[idxG]); } if (idxB != -1) { b_channel_start = reinterpret_cast<const float *>(tile.images[idxB]); } if (idxA != -1) { a_channel_start = reinterpret_cast<const float *>(tile.images[idxA]); } uint16_t *first_row_w16 = iw16 + (tile.offset_y * tile_height * exr_image.width + tile.offset_x * tile_width) * output_channels; float *first_row_w32 = iw32 + (tile.offset_y * tile_height * exr_image.width + tile.offset_x * tile_width) * output_channels; for (int y = 0; y < th; y++) { const float *r_channel = r_channel_start + y * tile_width; const float *g_channel = nullptr; const float *b_channel = nullptr; const float *a_channel = nullptr; if (g_channel_start) { g_channel = g_channel_start + y * tile_width; } if (b_channel_start) { b_channel = b_channel_start + y * tile_width; } if (a_channel_start) { a_channel = a_channel_start + y * tile_width; } if (use_float16) { uint16_t *row_w = first_row_w16 + (y * exr_image.width * output_channels); for (int x = 0; x < tw; x++) { Color color; color.r = *r_channel++; if (g_channel) { color.g = *g_channel++; } if (b_channel) { color.b = *b_channel++; } if (a_channel) { color.a = *a_channel++; } if (p_flags & FLAG_FORCE_LINEAR) { color = color.srgb_to_linear(); } *row_w++ = Math::make_half_float(color.r); if (g_channel) { *row_w++ = Math::make_half_float(color.g); } if (b_channel) { *row_w++ = Math::make_half_float(color.b); } if (a_channel) { *row_w++ = Math::make_half_float(color.a); } } } else { float *row_w = first_row_w32 + (y * exr_image.width * output_channels); for (int x = 0; x < tw; x++) { Color color; color.r = *r_channel++; if (g_channel) { color.g = *g_channel++; } if (b_channel) { color.b = *b_channel++; } if (a_channel) { color.a = *a_channel++; } if (p_flags & FLAG_FORCE_LINEAR) { color = color.srgb_to_linear(); } *row_w++ = color.r; if (g_channel) { *row_w++ = color.g; } if (b_channel) { *row_w++ = color.b; } if (a_channel) { *row_w++ = color.a; } } } } } } p_image->set_data(exr_image.width, exr_image.height, false, format, imgdata); FreeEXRHeader(&exr_header); FreeEXRImage(&exr_image); return OK; } void ImageLoaderTinyEXR::get_recognized_extensions(List<String> *p_extensions) const { p_extensions->push_back("exr"); } ImageLoaderTinyEXR::ImageLoaderTinyEXR() { }