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/*************************************************************************/
/* image_loader_tinyexr.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2018 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 "os/os.h"
#include "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 (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;
if (idxA > 0) {
imgdata.resize(exr_image.width * exr_image.height * 8); //RGBA16
format = Image::FORMAT_RGBAH;
} else {
imgdata.resize(exr_image.width * exr_image.height * 6); //RGB16
format = Image::FORMAT_RGBH;
}
{
PoolVector<uint8_t>::Write wd = imgdata.write();
uint16_t *iw = (uint16_t *)wd.ptr();
// Assume `out_rgba` have enough memory allocated.
for (int i = 0; i < exr_image.width * exr_image.height; i++) {
Color color(
reinterpret_cast<float **>(exr_image.images)[idxR][i],
reinterpret_cast<float **>(exr_image.images)[idxG][i],
reinterpret_cast<float **>(exr_image.images)[idxB][i]);
if (p_force_linear)
color = color.to_linear();
*iw++ = Math::make_half_float(color.r);
*iw++ = Math::make_half_float(color.g);
*iw++ = Math::make_half_float(color.b);
if (idxA > 0) {
*iw++ = Math::make_half_float(reinterpret_cast<float **>(exr_image.images)[idxA][i]);
}
}
}
p_image->create(exr_image.width, exr_image.height, false, format, imgdata);
w = PoolVector<uint8_t>::Write();
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() {
}
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