251 lines
7.7 KiB
C++
251 lines
7.7 KiB
C++
/*************************************************************************/
|
|
/* 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) {
|
|
|
|
Vector<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);
|
|
|
|
uint8_t *w = src_image.ptrw();
|
|
|
|
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 = 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)
|
|
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, 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;
|
|
}
|
|
}
|
|
|
|
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
|
|
|
|
Vector<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;
|
|
}
|
|
|
|
{
|
|
uint8_t *wd = imgdata.ptrw();
|
|
uint16_t *iw = (uint16_t *)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 = reinterpret_cast<const float *>(tile.images[idxG]);
|
|
const float *b_channel_start = reinterpret_cast<const float *>(tile.images[idxB]);
|
|
const float *a_channel_start = nullptr;
|
|
|
|
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 = nullptr;
|
|
|
|
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);
|
|
|
|
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() {
|
|
}
|