/*************************************************************************/ /* image_loader_tinyexr.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2020 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_tinyexr.h" #include "core/os/os.h" #include "core/print_string.h" #include "thirdparty/tinyexr/tinyexr.h" Error ImageLoaderTinyEXR::load_image(Ref<Image> p_image, FileAccess *f, bool p_force_linear, float p_scale) { PoolVector<uint8_t> src_image; int src_image_len = f->get_len(); ERR_FAIL_COND_V(src_image_len == 0, ERR_FILE_CORRUPT); src_image.resize(src_image_len); PoolVector<uint8_t>::Write w = src_image.write(); f->get_buffer(&w[0], src_image_len); f->close(); // 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 = NULL; InitEXRHeader(&exr_header); int ret = ParseEXRVersionFromMemory(&exr_version, w.ptr(), src_image_len); if (ret != TINYEXR_SUCCESS) { return ERR_FILE_CORRUPT; } ret = ParseEXRHeaderFromMemory(&exr_header, &exr_version, w.ptr(), src_image_len, &err); if (ret != TINYEXR_SUCCESS) { if (err) { ERR_PRINTS(String(err)); } return ERR_FILE_CORRUPT; } // Read HALF channel as FLOAT. (GH-13490) for (int i = 0; i < exr_header.num_channels; i++) { if (exr_header.pixel_types[i] == TINYEXR_PIXELTYPE_HALF) { exr_header.requested_pixel_types[i] = TINYEXR_PIXELTYPE_FLOAT; } } InitEXRImage(&exr_image); ret = LoadEXRImageFromMemory(&exr_image, &exr_header, w.ptr(), src_image_len, &err); if (ret != TINYEXR_SUCCESS) { if (err) { ERR_PRINTS(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; } } if (exr_header.num_channels == 1) { // Grayscale channel only. idxR = 0; idxG = 0; idxB = 0; idxA = 0; } else { // Assume RGB(A) if (idxR == -1) { ERR_PRINT("TinyEXR: R channel not found."); // @todo { free exr_image } return ERR_FILE_CORRUPT; } if (idxG == -1) { ERR_PRINT("TinyEXR: G channel not found."); // @todo { free exr_image } return ERR_FILE_CORRUPT; } if (idxB == -1) { ERR_PRINT("TinyEXR: B channel not found."); // @todo { free exr_image } return ERR_FILE_CORRUPT; } } // EXR image data loaded, now parse it into Godot-friendly image data PoolVector<uint8_t> imgdata; Image::Format format; int output_channels = 0; if (idxA != -1) { imgdata.resize(exr_image.width * exr_image.height * 8); //RGBA16 format = Image::FORMAT_RGBAH; output_channels = 4; } else { imgdata.resize(exr_image.width * exr_image.height * 6); //RGB16 format = Image::FORMAT_RGBH; output_channels = 3; } 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; } { PoolVector<uint8_t>::Write wd = imgdata.write(); uint16_t *iw = (uint16_t *)wd.ptr(); // 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 = reinterpret_cast<const float *>(tile.images[idxG]); const float *b_channel_start = reinterpret_cast<const float *>(tile.images[idxB]); const float *a_channel_start = NULL; if (idxA != -1) { a_channel_start = reinterpret_cast<const float *>(tile.images[idxA]); } uint16_t *first_row_w = iw + (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 = g_channel_start + y * tile_width; const float *b_channel = b_channel_start + y * tile_width; const float *a_channel = NULL; if (a_channel_start) { a_channel = a_channel_start + y * tile_width; } uint16_t *row_w = first_row_w + (y * exr_image.width * output_channels); for (int x = 0; x < tw; x++) { Color color(*r_channel++, *g_channel++, *b_channel++); if (p_force_linear) color = color.to_linear(); *row_w++ = Math::make_half_float(color.r); *row_w++ = Math::make_half_float(color.g); *row_w++ = Math::make_half_float(color.b); if (idxA != -1) { *row_w++ = Math::make_half_float(*a_channel++); } } } } } p_image->create(exr_image.width, exr_image.height, false, format, imgdata); w.release(); 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() { }