6995b0429c
Various fixes to UV2 unwrapping and the GPU lightmapper. Listed here for context in case of git blame/bisect: * Fix UV2 unwrapping on import, also cleaned up the unwrap cache code. * Fix saving of RGBA images in EXR format. * Fixes to the GPU lightmapper: - Added padding between atlas elements, avoids bleeding. - Remove old SDF generation code. - Fix baked attenuation for Omni/Spot lights. - Fix baking of material properties onto UV2 (wireframe was wrongly used before). - Disable statically baked lights for objects that have a lightmap texture to avoid applying the same light twice. - Fix lightmap pairing in RendererSceneCull. - Fix UV2 array generated from `RenderingServer::mesh_surface_get_arrays()`. - Port autoexposure fix for OIDN from 3.x. - Save debug textures as EXR when using floating point format.
284 lines
9 KiB
C++
284 lines
9 KiB
C++
/*************************************************************************/
|
|
/* image_saver_tinyexr.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2021 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_saver_tinyexr.h"
|
|
#include "core/math/math_funcs.h"
|
|
|
|
#include "thirdparty/tinyexr/tinyexr.h"
|
|
|
|
static bool is_supported_format(Image::Format p_format) {
|
|
// This is checked before anything else.
|
|
// Mostly uncompressed formats are considered.
|
|
switch (p_format) {
|
|
case Image::FORMAT_RF:
|
|
case Image::FORMAT_RGF:
|
|
case Image::FORMAT_RGBF:
|
|
case Image::FORMAT_RGBAF:
|
|
case Image::FORMAT_RH:
|
|
case Image::FORMAT_RGH:
|
|
case Image::FORMAT_RGBH:
|
|
case Image::FORMAT_RGBAH:
|
|
case Image::FORMAT_R8:
|
|
case Image::FORMAT_RG8:
|
|
case Image::FORMAT_RGB8:
|
|
case Image::FORMAT_RGBA8:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
enum SrcPixelType {
|
|
SRC_FLOAT,
|
|
SRC_HALF,
|
|
SRC_BYTE,
|
|
SRC_UNSUPPORTED
|
|
};
|
|
|
|
static SrcPixelType get_source_pixel_type(Image::Format p_format) {
|
|
switch (p_format) {
|
|
case Image::FORMAT_RF:
|
|
case Image::FORMAT_RGF:
|
|
case Image::FORMAT_RGBF:
|
|
case Image::FORMAT_RGBAF:
|
|
return SRC_FLOAT;
|
|
case Image::FORMAT_RH:
|
|
case Image::FORMAT_RGH:
|
|
case Image::FORMAT_RGBH:
|
|
case Image::FORMAT_RGBAH:
|
|
return SRC_HALF;
|
|
case Image::FORMAT_R8:
|
|
case Image::FORMAT_RG8:
|
|
case Image::FORMAT_RGB8:
|
|
case Image::FORMAT_RGBA8:
|
|
return SRC_BYTE;
|
|
default:
|
|
return SRC_UNSUPPORTED;
|
|
}
|
|
}
|
|
|
|
static int get_target_pixel_type(Image::Format p_format) {
|
|
switch (p_format) {
|
|
case Image::FORMAT_RF:
|
|
case Image::FORMAT_RGF:
|
|
case Image::FORMAT_RGBF:
|
|
case Image::FORMAT_RGBAF:
|
|
return TINYEXR_PIXELTYPE_FLOAT;
|
|
case Image::FORMAT_RH:
|
|
case Image::FORMAT_RGH:
|
|
case Image::FORMAT_RGBH:
|
|
case Image::FORMAT_RGBAH:
|
|
// EXR doesn't support 8-bit channels so in that case we'll convert
|
|
case Image::FORMAT_R8:
|
|
case Image::FORMAT_RG8:
|
|
case Image::FORMAT_RGB8:
|
|
case Image::FORMAT_RGBA8:
|
|
return TINYEXR_PIXELTYPE_HALF;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int get_pixel_type_size(int p_pixel_type) {
|
|
switch (p_pixel_type) {
|
|
case TINYEXR_PIXELTYPE_HALF:
|
|
return 2;
|
|
case TINYEXR_PIXELTYPE_FLOAT:
|
|
return 4;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int get_channel_count(Image::Format p_format) {
|
|
switch (p_format) {
|
|
case Image::FORMAT_RF:
|
|
case Image::FORMAT_RH:
|
|
case Image::FORMAT_R8:
|
|
return 1;
|
|
case Image::FORMAT_RGF:
|
|
case Image::FORMAT_RGH:
|
|
case Image::FORMAT_RG8:
|
|
return 2;
|
|
case Image::FORMAT_RGBF:
|
|
case Image::FORMAT_RGBH:
|
|
case Image::FORMAT_RGB8:
|
|
return 3;
|
|
case Image::FORMAT_RGBAF:
|
|
case Image::FORMAT_RGBAH:
|
|
case Image::FORMAT_RGBA8:
|
|
return 4;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
Error save_exr(const String &p_path, const Ref<Image> &p_img, bool p_grayscale) {
|
|
Image::Format format = p_img->get_format();
|
|
|
|
if (!is_supported_format(format)) {
|
|
// Format not supported
|
|
print_error("Image format not supported for saving as EXR. Consider saving as PNG.");
|
|
return ERR_UNAVAILABLE;
|
|
}
|
|
|
|
EXRHeader header;
|
|
InitEXRHeader(&header);
|
|
|
|
EXRImage image;
|
|
InitEXRImage(&image);
|
|
|
|
const int max_channels = 4;
|
|
|
|
// Godot does not support more than 4 channels,
|
|
// so we can preallocate header infos on the stack and use only the subset we need
|
|
PackedByteArray channels[max_channels];
|
|
unsigned char *channels_ptrs[max_channels];
|
|
EXRChannelInfo channel_infos[max_channels];
|
|
int pixel_types[max_channels];
|
|
int requested_pixel_types[max_channels] = { -1 };
|
|
|
|
// Gimp and Blender are a bit annoying so order of channels isn't straightforward.
|
|
const int channel_mappings[4][4] = {
|
|
{ 0 }, // R
|
|
{ 1, 0 }, // GR
|
|
{ 2, 1, 0 }, // BGR
|
|
{ 3, 2, 1, 0 } // ABGR
|
|
};
|
|
|
|
int channel_count = get_channel_count(format);
|
|
ERR_FAIL_COND_V(channel_count < 0, ERR_UNAVAILABLE);
|
|
ERR_FAIL_COND_V(p_grayscale && channel_count != 1, ERR_INVALID_PARAMETER);
|
|
|
|
int target_pixel_type = get_target_pixel_type(format);
|
|
ERR_FAIL_COND_V(target_pixel_type < 0, ERR_UNAVAILABLE);
|
|
int target_pixel_type_size = get_pixel_type_size(target_pixel_type);
|
|
ERR_FAIL_COND_V(target_pixel_type_size < 0, ERR_UNAVAILABLE);
|
|
SrcPixelType src_pixel_type = get_source_pixel_type(format);
|
|
ERR_FAIL_COND_V(src_pixel_type == SRC_UNSUPPORTED, ERR_UNAVAILABLE);
|
|
const int pixel_count = p_img->get_width() * p_img->get_height();
|
|
|
|
const int *channel_mapping = channel_mappings[channel_count - 1];
|
|
|
|
{
|
|
PackedByteArray src_data = p_img->get_data();
|
|
const uint8_t *src_r = src_data.ptr();
|
|
|
|
for (int channel_index = 0; channel_index < channel_count; ++channel_index) {
|
|
// De-interleave channels
|
|
|
|
PackedByteArray &dst = channels[channel_index];
|
|
dst.resize(pixel_count * target_pixel_type_size);
|
|
|
|
uint8_t *dst_w = dst.ptrw();
|
|
|
|
if (src_pixel_type == SRC_FLOAT && target_pixel_type == TINYEXR_PIXELTYPE_FLOAT) {
|
|
// Note: we don't save mipmaps
|
|
CRASH_COND(src_data.size() < pixel_count * channel_count * target_pixel_type_size);
|
|
|
|
const float *src_rp = (float *)src_r;
|
|
float *dst_wp = (float *)dst_w;
|
|
|
|
for (int i = 0; i < pixel_count; ++i) {
|
|
dst_wp[i] = src_rp[channel_index + i * channel_count];
|
|
}
|
|
|
|
} else if (src_pixel_type == SRC_HALF && target_pixel_type == TINYEXR_PIXELTYPE_HALF) {
|
|
CRASH_COND(src_data.size() < pixel_count * channel_count * target_pixel_type_size);
|
|
|
|
const uint16_t *src_rp = (uint16_t *)src_r;
|
|
uint16_t *dst_wp = (uint16_t *)dst_w;
|
|
|
|
for (int i = 0; i < pixel_count; ++i) {
|
|
dst_wp[i] = src_rp[channel_index + i * channel_count];
|
|
}
|
|
|
|
} else if (src_pixel_type == SRC_BYTE && target_pixel_type == TINYEXR_PIXELTYPE_HALF) {
|
|
CRASH_COND(src_data.size() < pixel_count * channel_count);
|
|
|
|
const uint8_t *src_rp = (uint8_t *)src_r;
|
|
uint16_t *dst_wp = (uint16_t *)dst_w;
|
|
|
|
for (int i = 0; i < pixel_count; ++i) {
|
|
dst_wp[i] = Math::make_half_float(src_rp[channel_index + i * channel_count] / 255.f);
|
|
}
|
|
|
|
} else {
|
|
CRASH_NOW();
|
|
}
|
|
|
|
int remapped_index = channel_mapping[channel_index];
|
|
|
|
channels_ptrs[remapped_index] = dst_w;
|
|
|
|
// No conversion
|
|
pixel_types[remapped_index] = target_pixel_type;
|
|
requested_pixel_types[remapped_index] = target_pixel_type;
|
|
|
|
// Write channel name
|
|
if (p_grayscale) {
|
|
channel_infos[remapped_index].name[0] = 'Y';
|
|
channel_infos[remapped_index].name[1] = '\0';
|
|
} else {
|
|
const char *rgba = "RGBA";
|
|
channel_infos[remapped_index].name[0] = rgba[channel_index];
|
|
channel_infos[remapped_index].name[1] = '\0';
|
|
}
|
|
}
|
|
}
|
|
|
|
image.images = channels_ptrs;
|
|
image.num_channels = channel_count;
|
|
image.width = p_img->get_width();
|
|
image.height = p_img->get_height();
|
|
|
|
header.num_channels = image.num_channels;
|
|
header.channels = channel_infos;
|
|
header.pixel_types = pixel_types;
|
|
header.requested_pixel_types = requested_pixel_types;
|
|
header.compression_type = TINYEXR_COMPRESSIONTYPE_PIZ;
|
|
|
|
unsigned char *mem = nullptr;
|
|
const char *err = nullptr;
|
|
|
|
size_t bytes = SaveEXRImageToMemory(&image, &header, &mem, &err);
|
|
|
|
if (bytes == 0) {
|
|
print_error(String("Saving EXR failed. Error: {0}").format(varray(err)));
|
|
return ERR_FILE_CANT_WRITE;
|
|
} else {
|
|
FileAccessRef ref = FileAccess::open(p_path, FileAccess::WRITE);
|
|
ERR_FAIL_COND_V(!ref, ERR_FILE_CANT_WRITE);
|
|
ref->store_buffer(mem, bytes);
|
|
free(mem);
|
|
}
|
|
|
|
return OK;
|
|
}
|