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image.cpp
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/**************************************************************************/
/* image.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.h"
#include "core/config/project_settings.h"
#include "core/error/error_macros.h"
#include "core/io/image_loader.h"
#include "core/io/resource_loader.h"
#include "core/math/math_funcs.h"
#include "core/templates/hash_map.h"
#include "core/variant/dictionary.h"
#include <cmath>
const char *Image::format_names[Image::FORMAT_MAX] = {
"Lum8",
"LumAlpha8",
"Red8",
"RedGreen",
"RGB8",
"RGBA8",
"RGBA4444",
"RGBA5551", // Actually RGB565, kept as RGBA5551 for compatibility.
"RFloat",
"RGFloat",
"RGBFloat",
"RGBAFloat",
"RHalf",
"RGHalf",
"RGBHalf",
"RGBAHalf",
"RGBE9995",
"DXT1 RGB8",
"DXT3 RGBA8",
"DXT5 RGBA8",
"RGTC Red8",
"RGTC RedGreen8",
"BPTC_RGBA",
"BPTC_RGBF",
"BPTC_RGBFU",
"ETC",
"ETC2_R11",
"ETC2_R11S",
"ETC2_RG11",
"ETC2_RG11S",
"ETC2_RGB8",
"ETC2_RGBA8",
"ETC2_RGB8A1",
"ETC2_RA_AS_RG",
"FORMAT_DXT5_RA_AS_RG",
"ASTC_4x4",
"ASTC_4x4_HDR",
"ASTC_8x8",
"ASTC_8x8_HDR",
};
// External saver function pointers.
SavePNGFunc Image::save_png_func = nullptr;
SaveJPGFunc Image::save_jpg_func = nullptr;
SaveEXRFunc Image::save_exr_func = nullptr;
SaveWebPFunc Image::save_webp_func = nullptr;
SaveDDSFunc Image::save_dds_func = nullptr;
SavePNGBufferFunc Image::save_png_buffer_func = nullptr;
SaveJPGBufferFunc Image::save_jpg_buffer_func = nullptr;
SaveEXRBufferFunc Image::save_exr_buffer_func = nullptr;
SaveWebPBufferFunc Image::save_webp_buffer_func = nullptr;
SaveDDSBufferFunc Image::save_dds_buffer_func = nullptr;
// External loader function pointers.
ImageMemLoadFunc Image::_png_mem_loader_func = nullptr;
ImageMemLoadFunc Image::_png_mem_unpacker_func = nullptr;
ImageMemLoadFunc Image::_jpg_mem_loader_func = nullptr;
ImageMemLoadFunc Image::_webp_mem_loader_func = nullptr;
ImageMemLoadFunc Image::_tga_mem_loader_func = nullptr;
ImageMemLoadFunc Image::_bmp_mem_loader_func = nullptr;
ScalableImageMemLoadFunc Image::_svg_scalable_mem_loader_func = nullptr;
ImageMemLoadFunc Image::_ktx_mem_loader_func = nullptr;
ImageMemLoadFunc Image::_dds_mem_loader_func = nullptr;
// External VRAM compression function pointers.
void (*Image::_image_compress_bc_func)(Image *, Image::UsedChannels) = nullptr;
void (*Image::_image_compress_bptc_func)(Image *, Image::UsedChannels) = nullptr;
void (*Image::_image_compress_etc1_func)(Image *) = nullptr;
void (*Image::_image_compress_etc2_func)(Image *, Image::UsedChannels) = nullptr;
void (*Image::_image_compress_astc_func)(Image *, Image::ASTCFormat) = nullptr;
Error (*Image::_image_compress_bptc_rd_func)(Image *, Image::UsedChannels) = nullptr;
Error (*Image::_image_compress_bc_rd_func)(Image *, Image::UsedChannels) = nullptr;
// External VRAM decompression function pointers.
void (*Image::_image_decompress_bc)(Image *) = nullptr;
void (*Image::_image_decompress_bptc)(Image *) = nullptr;
void (*Image::_image_decompress_etc1)(Image *) = nullptr;
void (*Image::_image_decompress_etc2)(Image *) = nullptr;
void (*Image::_image_decompress_astc)(Image *) = nullptr;
// External packer function pointers.
Vector<uint8_t> (*Image::webp_lossy_packer)(const Ref<Image> &, float) = nullptr;
Vector<uint8_t> (*Image::webp_lossless_packer)(const Ref<Image> &) = nullptr;
Vector<uint8_t> (*Image::png_packer)(const Ref<Image> &) = nullptr;
Vector<uint8_t> (*Image::basis_universal_packer)(const Ref<Image> &, Image::UsedChannels) = nullptr;
Ref<Image> (*Image::webp_unpacker)(const Vector<uint8_t> &) = nullptr;
Ref<Image> (*Image::png_unpacker)(const Vector<uint8_t> &) = nullptr;
Ref<Image> (*Image::basis_universal_unpacker)(const Vector<uint8_t> &) = nullptr;
Ref<Image> (*Image::basis_universal_unpacker_ptr)(const uint8_t *, int) = nullptr;
void Image::_put_pixelb(int p_x, int p_y, uint32_t p_pixel_size, uint8_t *p_data, const uint8_t *p_pixel) {
uint32_t ofs = (p_y * width + p_x) * p_pixel_size;
memcpy(p_data + ofs, p_pixel, p_pixel_size);
}
void Image::_get_pixelb(int p_x, int p_y, uint32_t p_pixel_size, const uint8_t *p_data, uint8_t *p_pixel) {
uint32_t ofs = (p_y * width + p_x) * p_pixel_size;
memcpy(p_pixel, p_data + ofs, p_pixel_size);
}
int Image::get_format_pixel_size(Format p_format) {
switch (p_format) {
case FORMAT_L8:
return 1;
case FORMAT_LA8:
return 2;
case FORMAT_R8:
return 1;
case FORMAT_RG8:
return 2;
case FORMAT_RGB8:
return 3;
case FORMAT_RGBA8:
return 4;
case FORMAT_RGBA4444:
return 2;
case FORMAT_RGB565:
return 2;
case FORMAT_RF:
return 4;
case FORMAT_RGF:
return 8;
case FORMAT_RGBF:
return 12;
case FORMAT_RGBAF:
return 16;
case FORMAT_RH:
return 2;
case FORMAT_RGH:
return 4;
case FORMAT_RGBH:
return 6;
case FORMAT_RGBAH:
return 8;
case FORMAT_RGBE9995:
return 4;
case FORMAT_DXT1:
return 1;
case FORMAT_DXT3:
return 1;
case FORMAT_DXT5:
return 1;
case FORMAT_RGTC_R:
return 1;
case FORMAT_RGTC_RG:
return 1;
case FORMAT_BPTC_RGBA:
return 1;
case FORMAT_BPTC_RGBF:
return 1;
case FORMAT_BPTC_RGBFU:
return 1;
case FORMAT_ETC:
return 1;
case FORMAT_ETC2_R11:
return 1;
case FORMAT_ETC2_R11S:
return 1;
case FORMAT_ETC2_RG11:
return 1;
case FORMAT_ETC2_RG11S:
return 1;
case FORMAT_ETC2_RGB8:
return 1;
case FORMAT_ETC2_RGBA8:
return 1;
case FORMAT_ETC2_RGB8A1:
return 1;
case FORMAT_ETC2_RA_AS_RG:
return 1;
case FORMAT_DXT5_RA_AS_RG:
return 1;
case FORMAT_ASTC_4x4:
return 1;
case FORMAT_ASTC_4x4_HDR:
return 1;
case FORMAT_ASTC_8x8:
return 1;
case FORMAT_ASTC_8x8_HDR:
return 1;
case FORMAT_MAX: {
}
}
return 0;
}
void Image::get_format_min_pixel_size(Format p_format, int &r_w, int &r_h) {
switch (p_format) {
case FORMAT_DXT1:
case FORMAT_DXT3:
case FORMAT_DXT5:
case FORMAT_RGTC_R:
case FORMAT_RGTC_RG: {
r_w = 4;
r_h = 4;
} break;
case FORMAT_ETC: {
r_w = 4;
r_h = 4;
} break;
case FORMAT_BPTC_RGBA:
case FORMAT_BPTC_RGBF:
case FORMAT_BPTC_RGBFU: {
r_w = 4;
r_h = 4;
} break;
case FORMAT_ETC2_R11:
case FORMAT_ETC2_R11S:
case FORMAT_ETC2_RG11:
case FORMAT_ETC2_RG11S:
case FORMAT_ETC2_RGB8:
case FORMAT_ETC2_RGBA8:
case FORMAT_ETC2_RGB8A1:
case FORMAT_ETC2_RA_AS_RG:
case FORMAT_DXT5_RA_AS_RG: {
r_w = 4;
r_h = 4;
} break;
case FORMAT_ASTC_4x4:
case FORMAT_ASTC_4x4_HDR: {
r_w = 4;
r_h = 4;
} break;
case FORMAT_ASTC_8x8:
case FORMAT_ASTC_8x8_HDR: {
r_w = 8;
r_h = 8;
} break;
default: {
r_w = 1;
r_h = 1;
} break;
}
}
int Image::get_format_pixel_rshift(Format p_format) {
if (p_format == FORMAT_ASTC_8x8) {
return 2;
} else if (p_format == FORMAT_DXT1 || p_format == FORMAT_RGTC_R || p_format == FORMAT_ETC || p_format == FORMAT_ETC2_R11 || p_format == FORMAT_ETC2_R11S || p_format == FORMAT_ETC2_RGB8 || p_format == FORMAT_ETC2_RGB8A1) {
return 1;
} else {
return 0;
}
}
int Image::get_format_block_size(Format p_format) {
switch (p_format) {
case FORMAT_DXT1:
case FORMAT_DXT3:
case FORMAT_DXT5:
case FORMAT_RGTC_R:
case FORMAT_RGTC_RG: {
return 4;
}
case FORMAT_ETC: {
return 4;
}
case FORMAT_BPTC_RGBA:
case FORMAT_BPTC_RGBF:
case FORMAT_BPTC_RGBFU: {
return 4;
}
case FORMAT_ETC2_R11:
case FORMAT_ETC2_R11S:
case FORMAT_ETC2_RG11:
case FORMAT_ETC2_RG11S:
case FORMAT_ETC2_RGB8:
case FORMAT_ETC2_RGBA8:
case FORMAT_ETC2_RGB8A1:
case FORMAT_ETC2_RA_AS_RG:
case FORMAT_DXT5_RA_AS_RG: {
return 4;
}
case FORMAT_ASTC_4x4:
case FORMAT_ASTC_4x4_HDR: {
return 4;
}
case FORMAT_ASTC_8x8:
case FORMAT_ASTC_8x8_HDR: {
return 8;
}
default: {
}
}
return 1;
}
void Image::_get_mipmap_offset_and_size(int p_mipmap, int64_t &r_offset, int &r_width, int &r_height) const {
int w = width;
int h = height;
int64_t ofs = 0;
int pixel_size = get_format_pixel_size(format);
int pixel_rshift = get_format_pixel_rshift(format);
int block = get_format_block_size(format);
int minw, minh;
get_format_min_pixel_size(format, minw, minh);
for (int i = 0; i < p_mipmap; i++) {
int bw = w % block != 0 ? w + (block - w % block) : w;
int bh = h % block != 0 ? h + (block - h % block) : h;
int64_t s = bw * bh;
s *= pixel_size;
s >>= pixel_rshift;
ofs += s;
w = MAX(minw, w >> 1);
h = MAX(minh, h >> 1);
}
r_offset = ofs;
r_width = w;
r_height = h;
}
int64_t Image::get_mipmap_offset(int p_mipmap) const {
ERR_FAIL_INDEX_V(p_mipmap, get_mipmap_count() + 1, -1);
int64_t ofs;
int w, h;
_get_mipmap_offset_and_size(p_mipmap, ofs, w, h);
return ofs;
}
void Image::get_mipmap_offset_and_size(int p_mipmap, int64_t &r_ofs, int64_t &r_size) const {
int64_t ofs;
int w, h;
_get_mipmap_offset_and_size(p_mipmap, ofs, w, h);
int64_t ofs2;
_get_mipmap_offset_and_size(p_mipmap + 1, ofs2, w, h);
r_ofs = ofs;
r_size = ofs2 - ofs;
}
void Image::get_mipmap_offset_size_and_dimensions(int p_mipmap, int64_t &r_ofs, int64_t &r_size, int &w, int &h) const {
int64_t ofs;
_get_mipmap_offset_and_size(p_mipmap, ofs, w, h);
int64_t ofs2;
int w2, h2;
_get_mipmap_offset_and_size(p_mipmap + 1, ofs2, w2, h2);
r_ofs = ofs;
r_size = ofs2 - ofs;
}
Image::Image3DValidateError Image::validate_3d_image(Image::Format p_format, int p_width, int p_height, int p_depth, bool p_mipmaps, const Vector<Ref<Image>> &p_images) {
int w = p_width;
int h = p_height;
int d = p_depth;
int arr_ofs = 0;
while (true) {
for (int i = 0; i < d; i++) {
int idx = i + arr_ofs;
if (idx >= p_images.size()) {
return VALIDATE_3D_ERR_MISSING_IMAGES;
}
if (p_images[idx].is_null() || p_images[idx]->is_empty()) {
return VALIDATE_3D_ERR_IMAGE_EMPTY;
}
if (p_images[idx]->get_format() != p_format) {
return VALIDATE_3D_ERR_IMAGE_FORMAT_MISMATCH;
}
if (p_images[idx]->get_width() != w || p_images[idx]->get_height() != h) {
return VALIDATE_3D_ERR_IMAGE_SIZE_MISMATCH;
}
if (p_images[idx]->has_mipmaps()) {
return VALIDATE_3D_ERR_IMAGE_HAS_MIPMAPS;
}
}
arr_ofs += d;
if (!p_mipmaps) {
break;
}
if (w == 1 && h == 1 && d == 1) {
break;
}
w = MAX(1, w >> 1);
h = MAX(1, h >> 1);
d = MAX(1, d >> 1);
}
if (arr_ofs != p_images.size()) {
return VALIDATE_3D_ERR_EXTRA_IMAGES;
}
return VALIDATE_3D_OK;
}
String Image::get_3d_image_validation_error_text(Image3DValidateError p_error) {
switch (p_error) {
case VALIDATE_3D_OK: {
return "Ok";
} break;
case VALIDATE_3D_ERR_IMAGE_EMPTY: {
return "Empty Image found";
} break;
case VALIDATE_3D_ERR_MISSING_IMAGES: {
return "Missing Images";
} break;
case VALIDATE_3D_ERR_EXTRA_IMAGES: {
return "Too many Images";
} break;
case VALIDATE_3D_ERR_IMAGE_SIZE_MISMATCH: {
return "Image size mismatch";
} break;
case VALIDATE_3D_ERR_IMAGE_FORMAT_MISMATCH: {
return "Image format mismatch";
} break;
case VALIDATE_3D_ERR_IMAGE_HAS_MIPMAPS: {
return "Image has included mipmaps";
} break;
}
return String();
}
int Image::get_width() const {
return width;
}
int Image::get_height() const {
return height;
}
Size2i Image::get_size() const {
return Size2i(width, height);
}
bool Image::has_mipmaps() const {
return mipmaps;
}
int Image::get_mipmap_count() const {
if (mipmaps) {
return get_image_required_mipmaps(width, height, format);
} else {
return 0;
}
}
// Using template generates perfectly optimized code due to constant expression reduction and unused variable removal present in all compilers.
template <uint32_t read_bytes, bool read_alpha, uint32_t write_bytes, bool write_alpha, bool read_gray, bool write_gray>
static void _convert(int p_width, int p_height, const uint8_t *p_src, uint8_t *p_dst) {
constexpr uint32_t max_bytes = MAX(read_bytes, write_bytes);
for (int y = 0; y < p_height; y++) {
for (int x = 0; x < p_width; x++) {
const uint8_t *rofs = &p_src[((y * p_width) + x) * (read_bytes + (read_alpha ? 1 : 0))];
uint8_t *wofs = &p_dst[((y * p_width) + x) * (write_bytes + (write_alpha ? 1 : 0))];
uint8_t rgba[4] = { 0, 0, 0, 255 };
if constexpr (read_gray) {
rgba[0] = rofs[0];
rgba[1] = rofs[0];
rgba[2] = rofs[0];
} else {
for (uint32_t i = 0; i < max_bytes; i++) {
rgba[i] = (i < read_bytes) ? rofs[i] : 0;
}
}
if constexpr (read_alpha || write_alpha) {
rgba[3] = read_alpha ? rofs[read_bytes] : 255;
}
if constexpr (write_gray) {
// REC.709
const uint8_t luminance = (13938U * rgba[0] + 46869U * rgba[1] + 4729U * rgba[2] + 32768U) >> 16U;
wofs[0] = luminance;
} else {
for (uint32_t i = 0; i < write_bytes; i++) {
wofs[i] = rgba[i];
}
}
if constexpr (write_alpha) {
wofs[write_bytes] = rgba[3];
}
}
}
}
template <typename T, uint32_t read_channels, uint32_t write_channels, T def_zero, T def_one>
static void _convert_fast(int p_width, int p_height, const T *p_src, T *p_dst) {
uint32_t dst_count = 0;
uint32_t src_count = 0;
const int resolution = p_width * p_height;
for (int i = 0; i < resolution; i++) {
memcpy(p_dst + dst_count, p_src + src_count, MIN(read_channels, write_channels) * sizeof(T));
if constexpr (write_channels > read_channels) {
const T def_value[4] = { def_zero, def_zero, def_zero, def_one };
memcpy(p_dst + dst_count + read_channels, &def_value[read_channels], (write_channels - read_channels) * sizeof(T));
}
dst_count += write_channels;
src_count += read_channels;
}
}
static bool _are_formats_compatible(Image::Format p_format0, Image::Format p_format1) {
if (p_format0 <= Image::FORMAT_RGBA8 && p_format1 <= Image::FORMAT_RGBA8) {
return true;
} else if (p_format0 <= Image::FORMAT_RGBAH && p_format0 >= Image::FORMAT_RH && p_format1 <= Image::FORMAT_RGBAH && p_format1 >= Image::FORMAT_RH) {
return true;
} else if (p_format0 <= Image::FORMAT_RGBAF && p_format0 >= Image::FORMAT_RF && p_format1 <= Image::FORMAT_RGBAF && p_format1 >= Image::FORMAT_RF) {
return true;
}
return false;
}
void Image::convert(Format p_new_format) {
ERR_FAIL_INDEX_MSG(p_new_format, FORMAT_MAX, vformat("The Image format specified (%d) is out of range. See Image's Format enum.", p_new_format));
if (data.size() == 0 || p_new_format == format) {
return;
}
ERR_FAIL_COND_MSG(Image::is_format_compressed(format) || Image::is_format_compressed(p_new_format),
"Cannot convert to (or from) compressed formats. Use compress() and decompress() instead.");
// Includes the main image.
const int mipmap_count = get_mipmap_count() + 1;
if (!_are_formats_compatible(format, p_new_format)) {
// Use put/set pixel which is slower but works with non-byte formats.
Image new_img(width, height, mipmaps, p_new_format);
for (int mip = 0; mip < mipmap_count; mip++) {
Ref<Image> src_mip = get_image_from_mipmap(mip);
Ref<Image> new_mip = new_img.get_image_from_mipmap(mip);
for (int y = 0; y < src_mip->height; y++) {
for (int x = 0; x < src_mip->width; x++) {
new_mip->set_pixel(x, y, src_mip->get_pixel(x, y));
}
}
int64_t mip_offset = 0;
int64_t mip_size = 0;
new_img.get_mipmap_offset_and_size(mip, mip_offset, mip_size);
memcpy(new_img.data.ptrw() + mip_offset, new_mip->data.ptr(), mip_size);
}
_copy_internals_from(new_img);
return;
}
// Convert the formats in an optimized way by removing/adding color channels if necessary.
Image new_img(width, height, mipmaps, p_new_format);
const int conversion_type = format | p_new_format << 8;
for (int mip = 0; mip < mipmap_count; mip++) {
int64_t mip_offset = 0;
int64_t mip_size = 0;
int mip_width = 0;
int mip_height = 0;
get_mipmap_offset_size_and_dimensions(mip, mip_offset, mip_size, mip_width, mip_height);
const uint8_t *rptr = data.ptr() + mip_offset;
uint8_t *wptr = new_img.data.ptrw() + new_img.get_mipmap_offset(mip);
switch (conversion_type) {
case FORMAT_L8 | (FORMAT_LA8 << 8):
_convert<1, false, 1, true, true, true>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_L8 | (FORMAT_R8 << 8):
_convert<1, false, 1, false, true, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_L8 | (FORMAT_RG8 << 8):
_convert<1, false, 2, false, true, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_L8 | (FORMAT_RGB8 << 8):
_convert<1, false, 3, false, true, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_L8 | (FORMAT_RGBA8 << 8):
_convert<1, false, 3, true, true, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_LA8 | (FORMAT_L8 << 8):
_convert<1, true, 1, false, true, true>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_LA8 | (FORMAT_R8 << 8):
_convert<1, true, 1, false, true, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_LA8 | (FORMAT_RG8 << 8):
_convert<1, true, 2, false, true, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_LA8 | (FORMAT_RGB8 << 8):
_convert<1, true, 3, false, true, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_LA8 | (FORMAT_RGBA8 << 8):
_convert<1, true, 3, true, true, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_R8 | (FORMAT_L8 << 8):
_convert<1, false, 1, false, false, true>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_R8 | (FORMAT_LA8 << 8):
_convert<1, false, 1, true, false, true>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_R8 | (FORMAT_RG8 << 8):
_convert<1, false, 2, false, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_R8 | (FORMAT_RGB8 << 8):
_convert<1, false, 3, false, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_R8 | (FORMAT_RGBA8 << 8):
_convert<1, false, 3, true, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RG8 | (FORMAT_L8 << 8):
_convert<2, false, 1, false, false, true>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RG8 | (FORMAT_LA8 << 8):
_convert<2, false, 1, true, false, true>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RG8 | (FORMAT_R8 << 8):
_convert<2, false, 1, false, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RG8 | (FORMAT_RGB8 << 8):
_convert<2, false, 3, false, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RG8 | (FORMAT_RGBA8 << 8):
_convert<2, false, 3, true, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RGB8 | (FORMAT_L8 << 8):
_convert<3, false, 1, false, false, true>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RGB8 | (FORMAT_LA8 << 8):
_convert<3, false, 1, true, false, true>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RGB8 | (FORMAT_R8 << 8):
_convert<3, false, 1, false, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RGB8 | (FORMAT_RG8 << 8):
_convert<3, false, 2, false, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RGB8 | (FORMAT_RGBA8 << 8):
_convert<3, false, 3, true, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RGBA8 | (FORMAT_L8 << 8):
_convert<3, true, 1, false, false, true>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RGBA8 | (FORMAT_LA8 << 8):
_convert<3, true, 1, true, false, true>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RGBA8 | (FORMAT_R8 << 8):
_convert<3, true, 1, false, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RGBA8 | (FORMAT_RG8 << 8):
_convert<3, true, 2, false, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RGBA8 | (FORMAT_RGB8 << 8):
_convert<3, true, 3, false, false, false>(mip_width, mip_height, rptr, wptr);
break;
case FORMAT_RH | (FORMAT_RGH << 8):
_convert_fast<uint16_t, 1, 2, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RH | (FORMAT_RGBH << 8):
_convert_fast<uint16_t, 1, 3, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RH | (FORMAT_RGBAH << 8):
_convert_fast<uint16_t, 1, 4, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RGH | (FORMAT_RH << 8):
_convert_fast<uint16_t, 2, 1, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RGH | (FORMAT_RGBH << 8):
_convert_fast<uint16_t, 2, 3, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RGH | (FORMAT_RGBAH << 8):
_convert_fast<uint16_t, 2, 4, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RGBH | (FORMAT_RH << 8):
_convert_fast<uint16_t, 3, 1, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RGBH | (FORMAT_RGH << 8):
_convert_fast<uint16_t, 3, 2, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RGBH | (FORMAT_RGBAH << 8):
_convert_fast<uint16_t, 3, 4, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RGBAH | (FORMAT_RH << 8):
_convert_fast<uint16_t, 4, 1, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RGBAH | (FORMAT_RGH << 8):
_convert_fast<uint16_t, 4, 2, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RGBAH | (FORMAT_RGBH << 8):
_convert_fast<uint16_t, 4, 3, 0x0000, 0x3C00>(mip_width, mip_height, (const uint16_t *)rptr, (uint16_t *)wptr);
break;
case FORMAT_RF | (FORMAT_RGF << 8):
_convert_fast<uint32_t, 1, 2, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
case FORMAT_RF | (FORMAT_RGBF << 8):
_convert_fast<uint32_t, 1, 3, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
case FORMAT_RF | (FORMAT_RGBAF << 8):
_convert_fast<uint32_t, 1, 4, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
case FORMAT_RGF | (FORMAT_RF << 8):
_convert_fast<uint32_t, 2, 1, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
case FORMAT_RGF | (FORMAT_RGBF << 8):
_convert_fast<uint32_t, 2, 3, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
case FORMAT_RGF | (FORMAT_RGBAF << 8):
_convert_fast<uint32_t, 2, 4, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
case FORMAT_RGBF | (FORMAT_RF << 8):
_convert_fast<uint32_t, 3, 1, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
case FORMAT_RGBF | (FORMAT_RGF << 8):
_convert_fast<uint32_t, 3, 2, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
case FORMAT_RGBF | (FORMAT_RGBAF << 8):
_convert_fast<uint32_t, 3, 4, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
case FORMAT_RGBAF | (FORMAT_RF << 8):
_convert_fast<uint32_t, 4, 1, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
case FORMAT_RGBAF | (FORMAT_RGF << 8):
_convert_fast<uint32_t, 4, 2, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
case FORMAT_RGBAF | (FORMAT_RGBF << 8):
_convert_fast<uint32_t, 4, 3, 0x00000000, 0x3F800000>(mip_width, mip_height, (const uint32_t *)rptr, (uint32_t *)wptr);
break;
}
}
_copy_internals_from(new_img);
}
Image::Format Image::get_format() const {
return format;
}
static double _bicubic_interp_kernel(double x) {
x = Math::abs(x);
double bc = 0;
if (x <= 1) {
bc = (1.5 * x - 2.5) * x * x + 1;
} else if (x < 2) {
bc = ((-0.5 * x + 2.5) * x - 4) * x + 2;
}
return bc;
}
template <int CC, typename T>
static void _scale_cubic(const uint8_t *__restrict p_src, uint8_t *__restrict p_dst, uint32_t p_src_width, uint32_t p_src_height, uint32_t p_dst_width, uint32_t p_dst_height) {
// get source image size
int width = p_src_width;
int height = p_src_height;
double xfac = (double)width / p_dst_width;
double yfac = (double)height / p_dst_height;
// coordinates of source points and coefficients
double ox, oy, dx, dy;
int ox1, oy1, ox2, oy2;
// destination pixel values
// width and height decreased by 1
int ymax = height - 1;
int xmax = width - 1;
// temporary pointer
for (uint32_t y = 0; y < p_dst_height; y++) {
// Y coordinates
oy = (double)y * yfac - 0.5f;
oy1 = (int)oy;
dy = oy - (double)oy1;
for (uint32_t x = 0; x < p_dst_width; x++) {
// X coordinates
ox = (double)x * xfac - 0.5f;
ox1 = (int)ox;
dx = ox - (double)ox1;
// initial pixel value
T *__restrict dst = ((T *)p_dst) + (y * p_dst_width + x) * CC;
double color[CC];
for (int i = 0; i < CC; i++) {
color[i] = 0;
}
for (int n = -1; n < 3; n++) {
// get Y coefficient
[[maybe_unused]] double k1 = _bicubic_interp_kernel(dy - (double)n);
oy2 = oy1 + n;
if (oy2 < 0) {
oy2 = 0;
}
if (oy2 > ymax) {
oy2 = ymax;
}
for (int m = -1; m < 3; m++) {
// get X coefficient
[[maybe_unused]] double k2 = k1 * _bicubic_interp_kernel((double)m - dx);
ox2 = ox1 + m;
if (ox2 < 0) {
ox2 = 0;
}
if (ox2 > xmax) {
ox2 = xmax;
}
// get pixel of original image
const T *__restrict p = ((T *)p_src) + (oy2 * p_src_width + ox2) * CC;
for (int i = 0; i < CC; i++) {
if constexpr (sizeof(T) == 2) { //half float
color[i] = Math::half_to_float(p[i]);
} else {
color[i] += p[i] * k2;
}
}
}
}
for (int i = 0; i < CC; i++) {
if constexpr (sizeof(T) == 1) { //byte
dst[i] = CLAMP(Math::fast_ftoi(color[i]), 0, 255);
} else if constexpr (sizeof(T) == 2) { //half float
dst[i] = Math::make_half_float(color[i]);
} else {
dst[i] = color[i];
}
}
}
}
}
template <int CC, typename T>
static void _scale_bilinear(const uint8_t *__restrict p_src, uint8_t *__restrict p_dst, uint32_t p_src_width, uint32_t p_src_height, uint32_t p_dst_width, uint32_t p_dst_height) {
constexpr uint32_t FRAC_BITS = 8;
constexpr uint32_t FRAC_LEN = (1 << FRAC_BITS);
constexpr uint32_t FRAC_HALF = (FRAC_LEN >> 1);
constexpr uint32_t FRAC_MASK = FRAC_LEN - 1;
for (uint32_t i = 0; i < p_dst_height; i++) {
// Add 0.5 in order to interpolate based on pixel center
uint32_t src_yofs_up_fp = (i + 0.5) * p_src_height * FRAC_LEN / p_dst_height;
// Calculate nearest src pixel center above current, and truncate to get y index
uint32_t src_yofs_up = src_yofs_up_fp >= FRAC_HALF ? (src_yofs_up_fp - FRAC_HALF) >> FRAC_BITS : 0;
uint32_t src_yofs_down = (src_yofs_up_fp + FRAC_HALF) >> FRAC_BITS;
if (src_yofs_down >= p_src_height) {
src_yofs_down = p_src_height - 1;
}
// Calculate distance to pixel center of src_yofs_up
uint32_t src_yofs_frac = src_yofs_up_fp & FRAC_MASK;
src_yofs_frac = src_yofs_frac >= FRAC_HALF ? src_yofs_frac - FRAC_HALF : src_yofs_frac + FRAC_HALF;
uint32_t y_ofs_up = src_yofs_up * p_src_width * CC;
uint32_t y_ofs_down = src_yofs_down * p_src_width * CC;
for (uint32_t j = 0; j < p_dst_width; j++) {
uint32_t src_xofs_left_fp = (j + 0.5) * p_src_width * FRAC_LEN / p_dst_width;
uint32_t src_xofs_left = src_xofs_left_fp >= FRAC_HALF ? (src_xofs_left_fp - FRAC_HALF) >> FRAC_BITS : 0;
uint32_t src_xofs_right = (src_xofs_left_fp + FRAC_HALF) >> FRAC_BITS;
if (src_xofs_right >= p_src_width) {
src_xofs_right = p_src_width - 1;
}
uint32_t src_xofs_frac = src_xofs_left_fp & FRAC_MASK;
src_xofs_frac = src_xofs_frac >= FRAC_HALF ? src_xofs_frac - FRAC_HALF : src_xofs_frac + FRAC_HALF;
src_xofs_left *= CC;
src_xofs_right *= CC;
for (uint32_t l = 0; l < CC; l++) {
if constexpr (sizeof(T) == 1) { //uint8
uint32_t p00 = p_src[y_ofs_up + src_xofs_left + l] << FRAC_BITS;
uint32_t p10 = p_src[y_ofs_up + src_xofs_right + l] << FRAC_BITS;
uint32_t p01 = p_src[y_ofs_down + src_xofs_left + l] << FRAC_BITS;
uint32_t p11 = p_src[y_ofs_down + src_xofs_right + l] << FRAC_BITS;
uint32_t interp_up = p00 + (((p10 - p00) * src_xofs_frac) >> FRAC_BITS);
uint32_t interp_down = p01 + (((p11 - p01) * src_xofs_frac) >> FRAC_BITS);
uint32_t interp = interp_up + (((interp_down - interp_up) * src_yofs_frac) >> FRAC_BITS);
interp >>= FRAC_BITS;
p_dst[i * p_dst_width * CC + j * CC + l] = uint8_t(interp);
} else if constexpr (sizeof(T) == 2) { //half float
float xofs_frac = float(src_xofs_frac) / (1 << FRAC_BITS);
float yofs_frac = float(src_yofs_frac) / (1 << FRAC_BITS);
const T *src = ((const T *)p_src);
T *dst = ((T *)p_dst);
float p00 = Math::half_to_float(src[y_ofs_up + src_xofs_left + l]);
float p10 = Math::half_to_float(src[y_ofs_up + src_xofs_right + l]);
float p01 = Math::half_to_float(src[y_ofs_down + src_xofs_left + l]);
float p11 = Math::half_to_float(src[y_ofs_down + src_xofs_right + l]);
float interp_up = p00 + (p10 - p00) * xofs_frac;
float interp_down = p01 + (p11 - p01) * xofs_frac;
float interp = interp_up + ((interp_down - interp_up) * yofs_frac);
dst[i * p_dst_width * CC + j * CC + l] = Math::make_half_float(interp);
} else if constexpr (sizeof(T) == 4) { //float
float xofs_frac = float(src_xofs_frac) / (1 << FRAC_BITS);
float yofs_frac = float(src_yofs_frac) / (1 << FRAC_BITS);
const T *src = ((const T *)p_src);
T *dst = ((T *)p_dst);
float p00 = src[y_ofs_up + src_xofs_left + l];
float p10 = src[y_ofs_up + src_xofs_right + l];
float p01 = src[y_ofs_down + src_xofs_left + l];
float p11 = src[y_ofs_down + src_xofs_right + l];
float interp_up = p00 + (p10 - p00) * xofs_frac;
float interp_down = p01 + (p11 - p01) * xofs_frac;
float interp = interp_up + ((interp_down - interp_up) * yofs_frac);
dst[i * p_dst_width * CC + j * CC + l] = interp;
}
}
}
}
}
template <int CC, typename T>
static void _scale_nearest(const uint8_t *__restrict p_src, uint8_t *__restrict p_dst, uint32_t p_src_width, uint32_t p_src_height, uint32_t p_dst_width, uint32_t p_dst_height) {
for (uint32_t i = 0; i < p_dst_height; i++) {
uint32_t src_yofs = i * p_src_height / p_dst_height;
uint32_t y_ofs = src_yofs * p_src_width * CC;
for (uint32_t j = 0; j < p_dst_width; j++) {
uint32_t src_xofs = j * p_src_width / p_dst_width;
src_xofs *= CC;
for (uint32_t l = 0; l < CC; l++) {
const T *src = ((const T *)p_src);