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duckstation/src/util/image.cpp

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// SPDX-FileCopyrightText: 2019-2025 Connor McLaughlin <stenzek@gmail.com>
// SPDX-License-Identifier: CC-BY-NC-ND-4.0
#include "image.h"
#include "texture_decompress.h"
#include "common/assert.h"
#include "common/bitutils.h"
#include "common/error.h"
#include "common/fastjmp.h"
#include "common/file_system.h"
#include "common/gsvector.h"
#include "common/heap_array.h"
#include "common/intrin.h"
#include "common/log.h"
#include "common/path.h"
#include "common/scoped_guard.h"
#include "common/string_util.h"
#include "lunasvg_c.h"
#include <jpeglib.h>
#include <png.h>
#include <webp/decode.h>
#include <webp/encode.h>
// clang-format off
#ifdef _MSC_VER
#pragma warning(disable : 4611) // warning C4611: interaction between '_setjmp' and C++ object destruction is non-portable
#endif
// clang-format on
LOG_CHANNEL(Image);
static bool PNGBufferLoader(Image* image, std::span<const u8> data, Error* error);
static bool PNGBufferSaver(const Image& image, DynamicHeapArray<u8>* data, u8 quality, Error* error);
static bool PNGFileLoader(Image* image, std::string_view filename, std::FILE* fp, Error* error);
static bool PNGFileSaver(const Image& image, std::string_view filename, std::FILE* fp, u8 quality, Error* error);
static bool JPEGBufferLoader(Image* image, std::span<const u8> data, Error* error);
static bool JPEGBufferSaver(const Image& image, DynamicHeapArray<u8>* data, u8 quality, Error* error);
static bool JPEGFileLoader(Image* image, std::string_view filename, std::FILE* fp, Error* error);
static bool JPEGFileSaver(const Image& image, std::string_view filename, std::FILE* fp, u8 quality, Error* error);
static bool WebPBufferLoader(Image* image, std::span<const u8> data, Error* error);
static bool WebPBufferSaver(const Image& image, DynamicHeapArray<u8>* data, u8 quality, Error* error);
static bool WebPFileLoader(Image* image, std::string_view filename, std::FILE* fp, Error* error);
static bool WebPFileSaver(const Image& image, std::string_view filename, std::FILE* fp, u8 quality, Error* error);
static bool DDSBufferLoader(Image* image, std::span<const u8> data, Error* error);
static bool DDSFileLoader(Image* image, std::string_view filename, std::FILE* fp, Error* error);
namespace {
struct FormatHandler
{
const char* extension;
bool (*buffer_loader)(Image*, std::span<const u8>, Error*);
bool (*buffer_saver)(const Image&, DynamicHeapArray<u8>*, u8, Error*);
bool (*file_loader)(Image*, std::string_view, std::FILE*, Error*);
bool (*file_saver)(const Image&, std::string_view, std::FILE*, u8, Error*);
};
} // namespace
static constexpr FormatHandler s_format_handlers[] = {
{"png", PNGBufferLoader, PNGBufferSaver, PNGFileLoader, PNGFileSaver},
{"jpg", JPEGBufferLoader, JPEGBufferSaver, JPEGFileLoader, JPEGFileSaver},
{"jpeg", JPEGBufferLoader, JPEGBufferSaver, JPEGFileLoader, JPEGFileSaver},
{"webp", WebPBufferLoader, WebPBufferSaver, WebPFileLoader, WebPFileSaver},
{"dds", DDSBufferLoader, nullptr, DDSFileLoader, nullptr},
};
static const FormatHandler* GetFormatHandler(std::string_view extension)
{
for (const FormatHandler& handler : s_format_handlers)
{
if (StringUtil::Strncasecmp(extension.data(), handler.extension, extension.size()) == 0)
return &handler;
}
return nullptr;
}
static void SwapBGRAToRGBA(void* pixels_out, u32 pixels_out_pitch, const void* pixels_in, u32 pixels_in_pitch,
u32 width, u32 height);
Image::Image() = default;
Image::Image(const Image& copy)
{
SetPixels(copy.m_width, copy.m_height, copy.m_format, copy.m_pixels.get(), copy.m_pitch);
}
Image::Image(u32 width, u32 height, ImageFormat format, const void* pixels, u32 pitch)
{
SetPixels(width, height, format, pixels, pitch);
}
Image::Image(u32 width, u32 height, ImageFormat format, PixelStorage pixels, u32 pitch)
: m_width(width), m_height(height), m_pitch(pitch), m_format(format), m_pixels(std::move(pixels))
{
}
Image::Image(u32 width, u32 height, ImageFormat format)
{
Resize(width, height, format, false);
}
Image::Image(Image&& move)
{
m_width = std::exchange(move.m_width, 0);
m_height = std::exchange(move.m_height, 0);
m_pitch = std::exchange(move.m_pitch, 0);
m_format = std::exchange(move.m_format, ImageFormat::None);
m_pixels = std::move(move.m_pixels);
}
void Image::Resize(u32 new_width, u32 new_height, bool preserve)
{
Resize(new_width, new_height, m_format, preserve);
}
void Image::Resize(u32 new_width, u32 new_height, ImageFormat format, bool preserve)
{
if (m_width == new_width && m_height == new_height && m_format == format)
return;
if (!preserve)
m_pixels.reset();
const u32 old_blocks_y = GetBlocksHigh();
const u32 old_pitch = m_pitch;
PixelStorage old_pixels =
std::exchange(m_pixels, Common::make_unique_aligned_for_overwrite<u8[]>(
VECTOR_ALIGNMENT, CalculateStorageSize(new_width, new_height, format)));
m_width = new_width;
m_height = new_height;
m_format = format;
m_pitch = CalculatePitch(new_width, new_height, format);
if (preserve && old_pixels)
{
StringUtil::StrideMemCpy(m_pixels.get(), m_pitch, old_pixels.get(), old_pitch, std::min(old_pitch, m_pitch),
std::min(old_blocks_y, GetBlocksHigh()));
}
}
Image& Image::operator=(const Image& copy)
{
SetPixels(copy.m_width, copy.m_height, copy.m_format, copy.m_pixels.get(), copy.m_pitch);
return *this;
}
Image& Image::operator=(Image&& move)
{
m_width = std::exchange(move.m_width, 0);
m_height = std::exchange(move.m_height, 0);
m_pitch = std::exchange(move.m_pitch, 0);
m_format = std::exchange(move.m_format, ImageFormat::None);
m_pixels = std::move(move.m_pixels);
return *this;
}
const char* Image::GetFormatName(ImageFormat format)
{
static constexpr std::array names = {
"None", // None
"RGBA8", // RGBA8
"BGRA8", // BGRA8
"RGB565", // RGB565
"RGB5A1", // RGB5A1
"A1BGR5", // A1BGR5
"BGR8", // BGR8
"BC1", // BC1
"BC2", // BC2
"BC3", // BC3
"BC7", // BC7
};
static_assert(names.size() == static_cast<size_t>(ImageFormat::MaxCount));
return names[static_cast<size_t>(format)];
}
u32 Image::GetPixelSize(ImageFormat format)
{
static constexpr std::array<u8, static_cast<size_t>(ImageFormat::MaxCount)> sizes = {{
0, // Unknown
4, // RGBA8
4, // BGRA8
2, // RGB565
2, // RGB5A1
2, // A1BGR5
3, // BGR8
8, // BC1 - 16 pixels in 64 bits
16, // BC2 - 16 pixels in 128 bits
16, // BC3 - 16 pixels in 128 bits
16, // BC4 - 16 pixels in 128 bits
}};
return sizes[static_cast<size_t>(format)];
}
bool Image::IsCompressedFormat(ImageFormat format)
{
return (format >= ImageFormat::BC1);
}
u32 Image::CalculatePitch(u32 width, u32 height, ImageFormat format)
{
const u32 pixel_size = GetPixelSize(format);
if (!IsCompressedFormat(format))
return Common::AlignUpPow2(width * pixel_size, 4);
// All compressed formats use a block size of 4.
const u32 blocks_wide = Common::AlignUpPow2(width, 4) / 4;
return blocks_wide * pixel_size;
}
u32 Image::CalculateStorageSize(u32 width, u32 height, ImageFormat format)
{
const u32 pixel_size = GetPixelSize(format);
if (!IsCompressedFormat(format))
return Common::AlignUpPow2(width * pixel_size, 4) * height;
const u32 blocks_wide = Common::AlignUpPow2(width, 4) / 4;
const u32 blocks_high = Common::AlignUpPow2(height, 4) / 4;
return (blocks_wide * pixel_size) * blocks_high;
}
u32 Image::CalculateStorageSize(u32 width, u32 height, u32 pitch, ImageFormat format)
{
height = IsCompressedFormat(format) ? (Common::AlignUpPow2(height, 4) / 4) : height;
return pitch * height;
}
u32 Image::GetBlocksWide() const
{
return IsCompressedFormat(m_format) ? (Common::AlignUpPow2(m_width, 4) / 4) : m_width;
}
u32 Image::GetBlocksHigh() const
{
return IsCompressedFormat(m_format) ? (Common::AlignUpPow2(m_height, 4) / 4) : m_height;
}
u32 Image::GetStorageSize() const
{
return GetBlocksHigh() * m_pitch;
}
std::span<const u8> Image::GetPixelsSpan() const
{
return std::span<const u8>(m_pixels.get(), GetStorageSize());
}
std::span<u8> Image::GetPixelsSpan()
{
return std::span<u8>(m_pixels.get(), GetStorageSize());
}
void Image::Clear()
{
std::memset(m_pixels.get(), 0, CalculateStorageSize(m_width, m_height, m_pitch, m_format));
}
void Image::Invalidate()
{
m_width = 0;
m_height = 0;
m_pitch = 0;
m_format = ImageFormat::None;
m_pixels.reset();
}
void Image::SetPixels(u32 width, u32 height, ImageFormat format, const void* pixels, u32 pitch)
{
Resize(width, height, format, false);
if (m_pixels)
StringUtil::StrideMemCpy(m_pixels.get(), m_pitch, pixels, pitch, m_pitch, GetBlocksHigh());
}
void Image::SetPixels(u32 width, u32 height, ImageFormat format, PixelStorage pixels, u32 pitch)
{
m_width = width;
m_height = height;
m_format = format;
m_pitch = pitch;
m_pixels = std::move(pixels);
}
bool Image::SetAllPixelsOpaque()
{
if (m_format == ImageFormat::RGBA8 || m_format == ImageFormat::BGRA8)
{
for (u32 y = 0; y < m_height; y++)
{
u8* row = GetRowPixels(y);
for (u32 x = 0; x < m_width; x++, row += sizeof(u32))
row[3] = 0xFF;
}
return true;
}
else if (m_format == ImageFormat::RGB5A1)
{
for (u32 y = 0; y < m_height; y++)
{
u8* row = GetRowPixels(y);
for (u32 x = 0; x < m_width; x++, row += sizeof(u32))
row[1] |= 0x80;
}
return true;
}
else if (m_format == ImageFormat::RGB565)
{
// Already opaque
return true;
}
else
{
// Unhandled format
return false;
}
}
Image::PixelStorage Image::TakePixels()
{
m_width = 0;
m_height = 0;
m_format = ImageFormat::None;
m_pitch = 0;
return std::move(m_pixels);
}
bool Image::LoadFromFile(const char* filename, Error* error /* = nullptr */)
{
auto fp = FileSystem::OpenManagedCFile(filename, "rb", error);
if (!fp)
return false;
return LoadFromFile(filename, fp.get(), error);
}
bool Image::SaveToFile(const char* filename, u8 quality /* = DEFAULT_SAVE_QUALITY */,
Error* error /* = nullptr */) const
{
auto fp = FileSystem::OpenManagedCFile(filename, "wb", error);
if (!fp)
return false;
if (SaveToFile(filename, fp.get(), quality, error))
return true;
// save failed
fp.reset();
FileSystem::DeleteFile(filename);
return false;
}
bool Image::LoadFromFile(std::string_view filename, std::FILE* fp, Error* error /* = nullptr */)
{
const std::string_view extension(Path::GetExtension(filename));
const FormatHandler* handler = GetFormatHandler(extension);
if (!handler || !handler->file_loader)
{
Error::SetStringFmt(error, "Unknown extension '{}'", extension);
return false;
}
return handler->file_loader(this, filename, fp, error);
}
bool Image::LoadFromBuffer(std::string_view filename, std::span<const u8> data, Error* error /* = nullptr */)
{
const std::string_view extension(Path::GetExtension(filename));
const FormatHandler* handler = GetFormatHandler(extension);
if (!handler || !handler->buffer_loader)
{
Error::SetStringFmt(error, "Unknown extension '{}'", extension);
return false;
}
return handler->buffer_loader(this, data, error);
}
bool Image::RasterizeSVG(const std::span<const u8> data, u32 width, u32 height, Error* error)
{
if (width == 0 || height == 0)
{
Error::SetStringFmt(error, "Invalid dimensions: {}x{}", width, height);
return false;
}
std::unique_ptr<lunasvg_document, void (*)(lunasvg_document*)> doc(
lunasvg_document_load_from_data(data.data(), data.size()), lunasvg_document_destroy);
if (!doc)
{
Error::SetStringView(error, "lunasvg_document_load_from_data() failed");
return false;
}
std::unique_ptr<lunasvg_bitmap, void (*)(lunasvg_bitmap*)> bitmap(
lunasvg_document_render_to_bitmap(doc.get(), width, height, 0), lunasvg_bitmap_destroy);
if (!bitmap)
{
Error::SetStringView(error, "lunasvg_document_render_to_bitmap() failed");
return false;
}
// lunasvg works in BGRA, swap to RGBA
Resize(width, height, ImageFormat::RGBA8, false);
SwapBGRAToRGBA(m_pixels.get(), m_pitch, lunasvg_bitmap_data(bitmap.get()), lunasvg_bitmap_stride(bitmap.get()), width,
height);
return true;
}
bool Image::SaveToFile(std::string_view filename, std::FILE* fp, u8 quality /* = DEFAULT_SAVE_QUALITY */,
Error* error /* = nullptr */) const
{
const std::string_view extension(Path::GetExtension(filename));
const FormatHandler* handler = GetFormatHandler(extension);
if (!handler || !handler->file_saver)
{
Error::SetStringFmt(error, "Unknown extension '{}'", extension);
return false;
}
if (!handler->file_saver(*this, filename, fp, quality, error))
return false;
if (std::fflush(fp) != 0)
{
Error::SetErrno(error, "fflush() failed: ", errno);
return false;
}
return true;
}
std::optional<DynamicHeapArray<u8>> Image::SaveToBuffer(std::string_view filename,
u8 quality /* = DEFAULT_SAVE_QUALITY */,
Error* error /* = nullptr */) const
{
std::optional<DynamicHeapArray<u8>> ret;
const std::string_view extension(Path::GetExtension(filename));
const FormatHandler* handler = GetFormatHandler(extension);
if (!handler || !handler->file_saver)
{
Error::SetStringFmt(error, "Unknown extension '{}'", extension);
return ret;
}
ret = DynamicHeapArray<u8>();
if (!handler->buffer_saver(*this, &ret.value(), quality, error))
ret.reset();
return ret;
}
void SwapBGRAToRGBA(void* pixels_out, u32 pixels_out_pitch, const void* pixels_in, u32 pixels_in_pitch, u32 width,
u32 height)
{
#ifdef GSVECTOR_HAS_FAST_INT_SHUFFLE8
constexpr u32 pixels_per_vec = sizeof(GSVector4i) / 4;
const u32 aligned_width = Common::AlignDownPow2(width, pixels_per_vec);
#endif
const u8* pixels_in_ptr = static_cast<const u8*>(pixels_in);
u8* pixels_out_ptr = static_cast<u8*>(pixels_out);
for (u32 y = 0; y < height; y++)
{
const u8* row_pixels_in_ptr = pixels_in_ptr;
u8* row_pixels_out_ptr = pixels_out_ptr;
u32 x = 0;
#ifdef GSVECTOR_HAS_FAST_INT_SHUFFLE8
for (; x < aligned_width; x += pixels_per_vec)
{
static constexpr GSVector4i mask = GSVector4i::cxpr8(2, 1, 0, 3, 6, 5, 4, 7, 10, 9, 8, 11, 14, 13, 12, 15);
GSVector4i::store<false>(row_pixels_out_ptr, GSVector4i::load<false>(row_pixels_in_ptr).shuffle8(mask));
row_pixels_in_ptr += sizeof(GSVector4i);
row_pixels_out_ptr += sizeof(GSVector4i);
}
#endif
for (; x < width; x++)
{
u32 pixel;
std::memcpy(&pixel, row_pixels_in_ptr, sizeof(pixel));
pixel = (pixel & 0xFF00FF00) | ((pixel & 0xFF) << 16) | ((pixel >> 16) & 0xFF);
std::memcpy(row_pixels_out_ptr, &pixel, sizeof(pixel));
row_pixels_in_ptr += sizeof(pixel);
row_pixels_out_ptr += sizeof(pixel);
}
pixels_in_ptr += pixels_in_pitch;
pixels_out_ptr += pixels_out_pitch;
}
}
template<ImageFormat format>
static void DecompressBC(Image& image_out, const Image& image_in)
{
constexpr u32 BC_BLOCK_SIZE = 4;
constexpr u32 BC_BLOCK_BYTES = 16;
const u32 blocks_wide = image_in.GetBlocksWide();
const u32 blocks_high = image_in.GetBlocksHigh();
for (u32 y = 0; y < blocks_high; y++)
{
const u8* block_in = image_in.GetRowPixels(y);
for (u32 x = 0; x < blocks_wide; x++, block_in += BC_BLOCK_BYTES)
{
// decompress block
switch (format)
{
case ImageFormat::BC1:
{
DecompressBlockBC1(x * BC_BLOCK_SIZE, y * BC_BLOCK_SIZE, image_out.GetPitch(), block_in,
image_out.GetPixels());
}
break;
case ImageFormat::BC2:
{
DecompressBlockBC2(x * BC_BLOCK_SIZE, y * BC_BLOCK_SIZE, image_out.GetPitch(), block_in,
image_out.GetPixels());
}
break;
case ImageFormat::BC3:
{
DecompressBlockBC3(x * BC_BLOCK_SIZE, y * BC_BLOCK_SIZE, image_out.GetPitch(), block_in,
image_out.GetPixels());
}
break;
case ImageFormat::BC7:
{
u32 block_pixels_out[BC_BLOCK_SIZE * BC_BLOCK_SIZE];
bc7decomp::unpack_bc7(block_in, reinterpret_cast<bc7decomp::color_rgba*>(block_pixels_out));
// and write it to the new image
const u32* copy_in_ptr = block_pixels_out;
u8* copy_out_ptr = image_out.GetRowPixels(y * BC_BLOCK_SIZE) + (x * BC_BLOCK_SIZE * sizeof(u32));
for (u32 sy = 0; sy < 4; sy++)
{
std::memcpy(copy_out_ptr, copy_in_ptr, sizeof(u32) * BC_BLOCK_SIZE);
copy_in_ptr += BC_BLOCK_SIZE;
copy_out_ptr += image_out.GetPitch();
}
}
break;
}
}
}
}
std::optional<Image> Image::ConvertToRGBA8(Error* error) const
{
std::optional<Image> ret;
if (!IsValid())
{
Error::SetStringView(error, "Image is not valid.");
return ret;
}
switch (m_format)
{
case ImageFormat::BGRA8:
{
ret = Image(m_width, m_height, ImageFormat::RGBA8);
SwapBGRAToRGBA(ret->GetPixels(), ret->GetPitch(), m_pixels.get(), m_pitch, m_width, m_height);
}
break;
case ImageFormat::RGBA8:
{
ret = Image(m_width, m_height, m_format, m_pixels.get(), m_pitch);
}
break;
case ImageFormat::RGB565:
{
ret = Image(m_width, m_height, ImageFormat::RGBA8);
constexpr u32 pixels_per_vec = 8;
[[maybe_unused]] const u32 aligned_width = Common::AlignDownPow2(m_width, pixels_per_vec);
for (u32 y = 0; y < m_height; y++)
{
const u8* pixels_in = GetRowPixels(y);
u8* pixels_out = ret->GetRowPixels(y);
u32 x = 0;
#ifdef CPU_ARCH_SIMD
for (; x < aligned_width; x += pixels_per_vec)
{
GSVector4i rgb565 = GSVector4i::load<false>(pixels_in);
pixels_in += sizeof(u16) * pixels_per_vec;
GSVector4i r = rgb565.srl16<11>();
r = r.sll16<3>() | r.sll16<13>().srl16<13>();
GSVector4i g = rgb565.sll16<5>().srl16<10>();
g = g.sll16<2>() | g.sll16<14>().srl16<14>();
GSVector4i b = rgb565.sll16<11>().srl16<11>();
b = b.sll16<3>() | b.sll16<13>().srl16<13>();
const GSVector4i low =
r.u16to32() | g.u16to32().sll32<8>() | b.u16to32().sll32<16>() | GSVector4i::cxpr(0xFF000000);
const GSVector4i high = r.uph64().u16to32() | g.uph64().u16to32().sll32<8>() |
b.uph64().u16to32().sll32<16>() | GSVector4i::cxpr(0xFF000000);
GSVector4i::store<false>(pixels_out, low);
pixels_out += sizeof(GSVector4i);
GSVector4i::store<false>(pixels_out, high);
pixels_out += sizeof(GSVector4i);
}
#endif
DONT_VECTORIZE_THIS_LOOP
for (; x < m_width; x++)
{
// RGB565 -> RGBA8
u16 pixel_in;
std::memcpy(&pixel_in, pixels_in, sizeof(u16));
pixels_in += sizeof(u16);
const u8 r5 = Truncate8(pixel_in >> 11);
const u8 g6 = Truncate8((pixel_in >> 5) & 0x3F);
const u8 b5 = Truncate8(pixel_in & 0x1F);
const u32 rgba8 = ZeroExtend32((r5 << 3) | (r5 & 7)) | (ZeroExtend32((g6 << 2) | (g6 & 3)) << 8) |
(ZeroExtend32((b5 << 3) | (b5 & 7)) << 16) | (0xFF000000u);
std::memcpy(pixels_out, &rgba8, sizeof(u32));
pixels_out += sizeof(u32);
}
}
}
break;
case ImageFormat::RGB5A1:
{
ret = Image(m_width, m_height, ImageFormat::RGBA8);
constexpr u32 pixels_per_vec = 8;
[[maybe_unused]] const u32 aligned_width = Common::AlignDownPow2(m_width, pixels_per_vec);
for (u32 y = 0; y < m_height; y++)
{
const u8* pixels_in = GetRowPixels(y);
u8* pixels_out = ret->GetRowPixels(y);
u32 x = 0;
#ifdef CPU_ARCH_SIMD
for (; x < aligned_width; x += pixels_per_vec)
{
GSVector4i rgb5a1 = GSVector4i::load<false>(pixels_in);
pixels_in += sizeof(u16) * pixels_per_vec;
GSVector4i r = rgb5a1.sll16<1>().srl16<11>();
r = r.sll16<3>() | r.sll16<13>().srl16<13>();
GSVector4i g = rgb5a1.sll16<6>().srl16<11>();
g = g.sll16<3>() | g.sll16<13>().srl16<13>();
GSVector4i b = rgb5a1.sll16<11>().srl16<11>();
b = b.sll16<3>() | b.sll16<13>().srl16<13>();
GSVector4i a = rgb5a1.sra16<7>().srl16<8>();
const GSVector4i low =
r.u16to32() | g.u16to32().sll32<8>() | b.u16to32().sll32<16>() | a.u16to32().sll32<24>();
const GSVector4i high = r.uph64().u16to32() | g.uph64().u16to32().sll32<8>() |
b.uph64().u16to32().sll32<16>() | a.uph64().u16to32().sll32<24>();
GSVector4i::store<false>(pixels_out, low);
pixels_out += sizeof(GSVector4i);
GSVector4i::store<false>(pixels_out, high);
pixels_out += sizeof(GSVector4i);
}
#endif
DONT_VECTORIZE_THIS_LOOP
for (; x < m_width; x++)
{
// RGB5A1 -> RGBA8
u16 pixel_in;
std::memcpy(&pixel_in, pixels_in, sizeof(u16));
pixels_in += sizeof(u16);
const u8 a1 = Truncate8(pixel_in >> 15);
const u8 r5 = Truncate8((pixel_in >> 10) & 0x1F);
const u8 g6 = Truncate8((pixel_in >> 5) & 0x1F);
const u8 b5 = Truncate8(pixel_in & 0x1F);
const u32 rgba8 = ZeroExtend32((r5 << 3) | (r5 & 7)) | (ZeroExtend32((g6 << 3) | (g6 & 7)) << 8) |
(ZeroExtend32((b5 << 3) | (b5 & 7)) << 16) | (a1 ? 0xFF000000u : 0u);
std::memcpy(pixels_out, &rgba8, sizeof(u32));
pixels_out += sizeof(u32);
}
}
}
break;
case ImageFormat::A1BGR5:
{
ret = Image(m_width, m_height, ImageFormat::RGBA8);
constexpr u32 pixels_per_vec = 8;
[[maybe_unused]] const u32 aligned_width = Common::AlignDownPow2(m_width, pixels_per_vec);
for (u32 y = 0; y < m_height; y++)
{
const u8* pixels_in = GetRowPixels(y);
u8* pixels_out = ret->GetRowPixels(y);
u32 x = 0;
#ifdef CPU_ARCH_SIMD
for (; x < aligned_width; x += pixels_per_vec)
{
GSVector4i a1bgr5 = GSVector4i::load<false>(pixels_in);
pixels_in += sizeof(u16) * pixels_per_vec;
GSVector4i r = a1bgr5.srl16<11>();
r = r.sll16<3>() | r.sll16<13>().srl16<13>();
GSVector4i g = a1bgr5.sll16<5>().srl16<11>();
g = g.sll16<3>() | g.sll16<13>().srl16<13>();
GSVector4i b = a1bgr5.sll16<10>().srl16<11>();
b = b.sll16<3>() | b.sll16<13>().srl16<13>();
GSVector4i a = a1bgr5.sll16<15>().sra16<7>().srl16<8>();
const GSVector4i low =
r.u16to32() | g.u16to32().sll32<8>() | b.u16to32().sll32<16>() | a.u16to32().sll32<24>();
const GSVector4i high = r.uph64().u16to32() | g.uph64().u16to32().sll32<8>() |
b.uph64().u16to32().sll32<16>() | a.uph64().u16to32().sll32<24>();
GSVector4i::store<false>(pixels_out, low);
pixels_out += sizeof(GSVector4i);
GSVector4i::store<false>(pixels_out, high);
pixels_out += sizeof(GSVector4i);
}
#endif
DONT_VECTORIZE_THIS_LOOP
for (; x < m_width; x++)
{
// RGB5A1 -> RGBA8
u16 pixel_in;
std::memcpy(&pixel_in, pixels_in, sizeof(u16));
pixels_in += sizeof(u16);
const u8 a1 = Truncate8(pixel_in & 0x01);
const u8 r5 = Truncate8((pixel_in >> 11) & 0x1F);
const u8 g6 = Truncate8((pixel_in >> 6) & 0x1F);
const u8 b5 = Truncate8((pixel_in >> 1) & 0x1F);
const u32 rgba8 = ZeroExtend32((r5 << 3) | (r5 & 7)) | (ZeroExtend32((g6 << 3) | (g6 & 7)) << 8) |
(ZeroExtend32((b5 << 3) | (b5 & 7)) << 16) | (a1 ? 0xFF000000u : 0u);
std::memcpy(pixels_out, &rgba8, sizeof(u32));
pixels_out += sizeof(u32);
}
}
}
break;
case ImageFormat::BGR8:
{
ret = Image(m_width, m_height, ImageFormat::RGBA8);
for (u32 y = 0; y < m_height; y++)
{
const u8* pixels_in = GetRowPixels(y);
u8* pixels_out = ret->GetRowPixels(y);
for (u32 x = 0; x < m_width; x++)
{
// Set alpha channel to full intensity.
const u32 rgba = (ZeroExtend32(pixels_in[0]) | (ZeroExtend32(pixels_in[2]) << 8) |
(ZeroExtend32(pixels_in[2]) << 16) | 0xFF000000u);
std::memcpy(pixels_out, &rgba, sizeof(rgba));
pixels_in += 3;
pixels_out += sizeof(rgba);
}
}
}
break;
case ImageFormat::BC1:
{
ret = Image(m_width, m_height, ImageFormat::RGBA8);
DecompressBC<ImageFormat::BC1>(ret.value(), *this);
}
break;
case ImageFormat::BC2:
{
ret = Image(m_width, m_height, ImageFormat::RGBA8);
DecompressBC<ImageFormat::BC2>(ret.value(), *this);
}
break;
case ImageFormat::BC3:
{
ret = Image(m_width, m_height, ImageFormat::RGBA8);
DecompressBC<ImageFormat::BC3>(ret.value(), *this);
}
break;
case ImageFormat::BC7:
{
ret = Image(m_width, m_height, ImageFormat::RGBA8);
DecompressBC<ImageFormat::BC7>(ret.value(), *this);
}
break;
default:
{
Error::SetStringFmt(error, "Unhandled format {}", GetFormatName(m_format));
}
break;
}
return ret;
}
void Image::FlipY()
{
if (!IsValid())
return;
PixelStorage temp = Common::make_unique_aligned_for_overwrite<u8[]>(VECTOR_ALIGNMENT, m_pitch);
const u32 half_height = m_height / 2;
for (u32 flip_row = 0; flip_row < half_height; flip_row++)
{
u8* top_ptr = &m_pixels[flip_row * m_pitch];
u8* bottom_ptr = &m_pixels[((m_height - 1) - flip_row) * m_pitch];
std::memcpy(temp.get(), top_ptr, m_pitch);
std::memcpy(top_ptr, bottom_ptr, m_pitch);
std::memcpy(bottom_ptr, temp.get(), m_pitch);
}
}
static void PNGSetErrorFunction(png_structp png_ptr, Error* error)
{
png_set_error_fn(
png_ptr, error,
[](png_structp png_ptr, png_const_charp message) {
Error::SetStringView(static_cast<Error*>(png_get_error_ptr(png_ptr)), message);
png_longjmp(png_ptr, 1);
},
[](png_structp png_ptr, png_const_charp message) { WARNING_LOG("libpng warning: {}", message); });
}
static bool PNGCommonLoader(Image* image, png_structp png_ptr, png_infop info_ptr, std::vector<png_bytep>& row_pointers)
{
png_read_info(png_ptr, info_ptr);
const u32 width = png_get_image_width(png_ptr, info_ptr);
const u32 height = png_get_image_height(png_ptr, info_ptr);
const png_byte color_type = png_get_color_type(png_ptr, info_ptr);
const png_byte bit_depth = png_get_bit_depth(png_ptr, info_ptr);
// Read any color_type into 8bit depth, RGBA format.
// See http://www.libpng.org/pub/png/libpng-manual.txt
if (bit_depth == 16)
png_set_strip_16(png_ptr);
if (color_type == PNG_COLOR_TYPE_PALETTE)
png_set_palette_to_rgb(png_ptr);
// PNG_COLOR_TYPE_GRAY_ALPHA is always 8 or 16bit depth.
if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
png_set_expand_gray_1_2_4_to_8(png_ptr);
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
png_set_tRNS_to_alpha(png_ptr);
// These color_type don't have an alpha channel then fill it with 0xff.
if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_PALETTE)
png_set_filler(png_ptr, 0xFF, PNG_FILLER_AFTER);
if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb(png_ptr);
png_read_update_info(png_ptr, info_ptr);
image->Resize(width, height, ImageFormat::RGBA8, false);
row_pointers.reserve(height);
for (u32 y = 0; y < height; y++)
row_pointers.push_back(reinterpret_cast<png_bytep>(image->GetRowPixels(y)));
png_read_image(png_ptr, row_pointers.data());
return true;
}
bool PNGFileLoader(Image* image, std::string_view filename, std::FILE* fp, Error* error)
{
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
if (!png_ptr)
{
Error::SetStringView(error, "png_create_read_struct() failed.");
return false;
}
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
Error::SetStringView(error, "png_create_info_struct() failed.");
png_destroy_read_struct(&png_ptr, nullptr, nullptr);
return false;
}
ScopedGuard cleanup([&png_ptr, &info_ptr]() { png_destroy_read_struct(&png_ptr, &info_ptr, nullptr); });
std::vector<png_bytep> row_pointers;
PNGSetErrorFunction(png_ptr, error);
if (setjmp(png_jmpbuf(png_ptr)))
{
image->Invalidate();
return false;
}
png_set_read_fn(png_ptr, fp, [](png_structp png_ptr, png_bytep data_ptr, png_size_t size) {
std::FILE* fp = static_cast<std::FILE*>(png_get_io_ptr(png_ptr));
if (std::fread(data_ptr, size, 1, fp) != 1)
png_error(png_ptr, "fread() failed");
});
return PNGCommonLoader(image, png_ptr, info_ptr, row_pointers);
}
bool PNGBufferLoader(Image* image, std::span<const u8> data, Error* error)
{
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
if (!png_ptr)
{
Error::SetStringView(error, "png_create_read_struct() failed.");
return false;
}
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
Error::SetStringView(error, "png_create_info_struct() failed.");
png_destroy_read_struct(&png_ptr, nullptr, nullptr);
return false;
}
ScopedGuard cleanup([&png_ptr, &info_ptr]() { png_destroy_read_struct(&png_ptr, &info_ptr, nullptr); });
std::vector<png_bytep> row_pointers;
PNGSetErrorFunction(png_ptr, error);
if (setjmp(png_jmpbuf(png_ptr)))
{
image->Invalidate();
return false;
}
struct IOData
{
std::span<const u8> buffer;
size_t buffer_pos;
};
IOData iodata = {data, 0};
png_set_read_fn(png_ptr, &iodata, [](png_structp png_ptr, png_bytep data_ptr, png_size_t size) {
IOData* data = static_cast<IOData*>(png_get_io_ptr(png_ptr));
const size_t read_size = std::min<size_t>(data->buffer.size() - data->buffer_pos, size);
if (read_size > 0)
{
std::memcpy(data_ptr, &data->buffer[data->buffer_pos], read_size);
data->buffer_pos += read_size;
}
});
return PNGCommonLoader(image, png_ptr, info_ptr, row_pointers);
}
static void PNGSaveCommon(const Image& image, png_structp png_ptr, png_infop info_ptr, u8 quality)
{
png_set_compression_level(png_ptr, std::clamp(quality / 10, 0, 9));
png_set_IHDR(png_ptr, info_ptr, image.GetWidth(), image.GetHeight(), 8, PNG_COLOR_TYPE_RGBA, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
png_write_info(png_ptr, info_ptr);
for (u32 y = 0; y < image.GetHeight(); ++y)
png_write_row(png_ptr, (png_bytep)image.GetRowPixels(y));
png_write_end(png_ptr, nullptr);
}
bool PNGFileSaver(const Image& image, std::string_view filename, std::FILE* fp, u8 quality, Error* error)
{
png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
png_infop info_ptr = nullptr;
if (!png_ptr)
{
Error::SetStringView(error, "png_create_write_struct() failed.");
return false;
}
ScopedGuard cleanup([&png_ptr, &info_ptr]() {
if (png_ptr)
png_destroy_write_struct(&png_ptr, info_ptr ? &info_ptr : nullptr);
});
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
Error::SetStringView(error, "png_create_info_struct() failed.");
return false;
}
PNGSetErrorFunction(png_ptr, error);
if (setjmp(png_jmpbuf(png_ptr)))
return false;
png_set_write_fn(
png_ptr, fp,
[](png_structp png_ptr, png_bytep data_ptr, png_size_t size) {
if (std::fwrite(data_ptr, size, 1, static_cast<std::FILE*>(png_get_io_ptr(png_ptr))) != 1)
png_error(png_ptr, "fwrite() failed");
},
[](png_structp png_ptr) {});
PNGSaveCommon(image, png_ptr, info_ptr, quality);
return true;
}
bool PNGBufferSaver(const Image& image, DynamicHeapArray<u8>* data, u8 quality, Error* error)
{
png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
png_infop info_ptr = nullptr;
if (!png_ptr)
{
Error::SetStringView(error, "png_create_write_struct() failed.");
return false;
}
ScopedGuard cleanup([&png_ptr, &info_ptr]() {
if (png_ptr)
png_destroy_write_struct(&png_ptr, info_ptr ? &info_ptr : nullptr);
});
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
Error::SetStringView(error, "png_create_info_struct() failed.");
return false;
}
struct IOData
{
DynamicHeapArray<u8>* buffer;
size_t buffer_pos;
};
IOData iodata = {data, 0};
data->resize(image.GetWidth() * image.GetHeight() * 2);
PNGSetErrorFunction(png_ptr, error);
if (setjmp(png_jmpbuf(png_ptr)))
return false;
png_set_write_fn(
png_ptr, data,
[](png_structp png_ptr, png_bytep data_ptr, png_size_t size) {
IOData* iodata = static_cast<IOData*>(png_get_io_ptr(png_ptr));
const size_t new_pos = iodata->buffer_pos + size;
if (new_pos > iodata->buffer->size())
iodata->buffer->resize(std::max(new_pos, iodata->buffer->size() * 2));
std::memcpy(iodata->buffer->data() + iodata->buffer_pos, data_ptr, size);
iodata->buffer_pos += size;
},
[](png_structp png_ptr) {});
PNGSaveCommon(image, png_ptr, info_ptr, quality);
iodata.buffer->resize(iodata.buffer_pos);
return true;
}
namespace {
struct JPEGErrorHandler
{
jpeg_error_mgr err;
Error* errptr;
fastjmp_buf jbuf;
JPEGErrorHandler(Error* errptr_)
{
jpeg_std_error(&err);
err.error_exit = &ErrorExit;
errptr = errptr_;
}
static void ErrorExit(j_common_ptr cinfo)
{
JPEGErrorHandler* eh = (JPEGErrorHandler*)cinfo->err;
char msg[JMSG_LENGTH_MAX];
eh->err.format_message(cinfo, msg);
Error::SetStringFmt(eh->errptr, "libjpeg fatal error: {}", msg);
fastjmp_jmp(&eh->jbuf, 1);
}
};
} // namespace
template<typename T>
static bool WrapJPEGDecompress(Image* image, Error* error, T setup_func)
{
std::vector<u8> scanline;
jpeg_decompress_struct info = {};
// NOTE: Be **very** careful not to allocate memory after calling this function.
// It won't get freed, because fastjmp does not unwind the stack.
JPEGErrorHandler errhandler(error);
if (fastjmp_set(&errhandler.jbuf) != 0)
{
jpeg_destroy_decompress(&info);
return false;
}
info.err = &errhandler.err;
jpeg_create_decompress(&info);
setup_func(info);
const int herr = jpeg_read_header(&info, TRUE);
if (herr != JPEG_HEADER_OK)
{
Error::SetStringFmt(error, "jpeg_read_header() returned {}", herr);
return false;
}
if (info.image_width == 0 || info.image_height == 0 || info.num_components < 3)
{
Error::SetStringFmt(error, "Invalid image dimensions: {}x{}x{}", info.image_width, info.image_height,
info.num_components);
return false;
}
info.out_color_space = JCS_RGB;
info.out_color_components = 3;
if (!jpeg_start_decompress(&info))
{
Error::SetStringFmt(error, "jpeg_start_decompress() returned failure");
return false;
}
image->Resize(info.image_width, info.image_height, ImageFormat::RGBA8, false);
scanline.resize(info.image_width * 3);
u8* scanline_buffer[1] = {scanline.data()};
bool result = true;
for (u32 y = 0; y < info.image_height; y++)
{
if (jpeg_read_scanlines(&info, scanline_buffer, 1) != 1)
{
Error::SetStringFmt(error, "jpeg_read_scanlines() failed at row {}", y);
result = false;
break;
}
// RGB -> RGBA
const u8* src_ptr = scanline.data();
u8* dst_ptr = image->GetRowPixels(y);
for (u32 x = 0; x < info.image_width; x++)
{
const u32 pixel32 =
(ZeroExtend32(src_ptr[0]) | (ZeroExtend32(src_ptr[1]) << 8) | (ZeroExtend32(src_ptr[2]) << 16) | 0xFF000000u);
std::memcpy(dst_ptr, &pixel32, sizeof(pixel32));
dst_ptr += sizeof(pixel32);
src_ptr += 3;
}
}
jpeg_finish_decompress(&info);
jpeg_destroy_decompress(&info);
return result;
}
bool JPEGBufferLoader(Image* image, std::span<const u8> data, Error* error)
{
return WrapJPEGDecompress(image, error, [data](jpeg_decompress_struct& info) {
jpeg_mem_src(&info, static_cast<const unsigned char*>(data.data()), static_cast<unsigned long>(data.size()));
});
}
bool JPEGFileLoader(Image* image, std::string_view filename, std::FILE* fp, Error* error)
{
static constexpr u32 BUFFER_SIZE = 16384;
struct FileCallback
{
jpeg_source_mgr mgr;
std::FILE* fp;
std::unique_ptr<u8[]> buffer;
Error* errptr;
bool end_of_file;
};
FileCallback cb = {
.mgr = {
.next_input_byte = nullptr,
.bytes_in_buffer = 0,
.init_source = [](j_decompress_ptr cinfo) {},
.fill_input_buffer = [](j_decompress_ptr cinfo) -> boolean {
FileCallback* cb = BASE_FROM_RECORD_FIELD(cinfo->src, FileCallback, mgr);
cb->mgr.next_input_byte = cb->buffer.get();
if (cb->end_of_file)
{
cb->buffer[0] = 0xFF;
cb->buffer[1] = JPEG_EOI;
cb->mgr.bytes_in_buffer = 2;
return TRUE;
}
const size_t r = std::fread(cb->buffer.get(), 1, BUFFER_SIZE, cb->fp);
cb->end_of_file |= (std::feof(cb->fp) != 0);
cb->mgr.bytes_in_buffer = r;
return TRUE;
},
.skip_input_data =
[](j_decompress_ptr cinfo, long num_bytes) {
FileCallback* cb = BASE_FROM_RECORD_FIELD(cinfo->src, FileCallback, mgr);
const size_t skip_in_buffer = std::min<size_t>(cb->mgr.bytes_in_buffer, static_cast<size_t>(num_bytes));
cb->mgr.next_input_byte += skip_in_buffer;
cb->mgr.bytes_in_buffer -= skip_in_buffer;
const size_t seek_cur = static_cast<size_t>(num_bytes) - skip_in_buffer;
if (seek_cur > 0)
{
if (!FileSystem::FSeek64(cb->fp, static_cast<size_t>(seek_cur), SEEK_CUR, cb->errptr))
{
cb->end_of_file = true;
return;
}
}
},
.resync_to_restart = jpeg_resync_to_restart,
.term_source = [](j_decompress_ptr cinfo) {},
},
.fp = fp,
.buffer = std::make_unique<u8[]>(BUFFER_SIZE),
.errptr = error,
.end_of_file = false,
};
return WrapJPEGDecompress(image, error, [&cb](jpeg_decompress_struct& info) { info.src = &cb.mgr; });
}
template<typename T>
static bool WrapJPEGCompress(const Image& image, u8 quality, Error* error, T setup_func)
{
std::vector<u8> scanline;
jpeg_compress_struct info = {};
// NOTE: Be **very** careful not to allocate memory after calling this function.
// It won't get freed, because fastjmp does not unwind the stack.
JPEGErrorHandler errhandler(error);
if (fastjmp_set(&errhandler.jbuf) != 0)
{
jpeg_destroy_compress(&info);
return false;
}
info.err = &errhandler.err;
jpeg_create_compress(&info);
setup_func(info);
info.image_width = image.GetWidth();
info.image_height = image.GetHeight();
info.in_color_space = JCS_RGB;
info.input_components = 3;
jpeg_set_defaults(&info);
jpeg_set_quality(&info, quality, TRUE);
jpeg_start_compress(&info, TRUE);
scanline.resize(image.GetWidth() * 3);
u8* scanline_buffer[1] = {scanline.data()};
bool result = true;
for (u32 y = 0; y < info.image_height; y++)
{
// RGBA -> RGB
u8* dst_ptr = scanline.data();
const u8* src_ptr = image.GetRowPixels(y);
for (u32 x = 0; x < info.image_width; x++)
{
u32 rgba;
std::memcpy(&rgba, src_ptr, sizeof(rgba));
src_ptr += sizeof(rgba);
*(dst_ptr++) = Truncate8(rgba);
*(dst_ptr++) = Truncate8(rgba >> 8);
*(dst_ptr++) = Truncate8(rgba >> 16);
}
if (jpeg_write_scanlines(&info, scanline_buffer, 1) != 1)
{
Error::SetStringFmt(error, "jpeg_write_scanlines() failed at row {}", y);
result = false;
break;
}
}
jpeg_finish_compress(&info);
jpeg_destroy_compress(&info);
return result;
}
bool JPEGBufferSaver(const Image& image, DynamicHeapArray<u8>* buffer, u8 quality, Error* error)
{
// give enough space to avoid reallocs
buffer->resize(image.GetWidth() * image.GetHeight() * 2);
struct MemCallback
{
jpeg_destination_mgr mgr;
DynamicHeapArray<u8>* buffer;
size_t buffer_used;
};
MemCallback cb;
cb.buffer = buffer;
cb.buffer_used = 0;
cb.mgr.next_output_byte = buffer->data();
cb.mgr.free_in_buffer = buffer->size();
cb.mgr.init_destination = [](j_compress_ptr cinfo) {};
cb.mgr.empty_output_buffer = [](j_compress_ptr cinfo) -> boolean {
MemCallback* cb = (MemCallback*)cinfo->dest;
// double size
cb->buffer_used = cb->buffer->size();
cb->buffer->resize(cb->buffer->size() * 2);
cb->mgr.next_output_byte = cb->buffer->data() + cb->buffer_used;
cb->mgr.free_in_buffer = cb->buffer->size() - cb->buffer_used;
return TRUE;
};
cb.mgr.term_destination = [](j_compress_ptr cinfo) {
MemCallback* cb = (MemCallback*)cinfo->dest;
// get final size
cb->buffer->resize(cb->buffer->size() - cb->mgr.free_in_buffer);
};
return WrapJPEGCompress(image, quality, error, [&cb](jpeg_compress_struct& info) { info.dest = &cb.mgr; });
}
bool JPEGFileSaver(const Image& image, std::string_view filename, std::FILE* fp, u8 quality, Error* error)
{
static constexpr u32 BUFFER_SIZE = 16384;
struct FileCallback
{
jpeg_destination_mgr mgr;
std::FILE* fp;
std::unique_ptr<u8[]> buffer;
Error* errptr;
bool write_error;
};
FileCallback cb = {
.mgr = {
.next_output_byte = nullptr,
.free_in_buffer = 0,
.init_destination =
[](j_compress_ptr cinfo) {
FileCallback* cb = BASE_FROM_RECORD_FIELD(cinfo->dest, FileCallback, mgr);
cb->mgr.next_output_byte = cb->buffer.get();
cb->mgr.free_in_buffer = BUFFER_SIZE;
},
.empty_output_buffer = [](j_compress_ptr cinfo) -> boolean {
FileCallback* cb = BASE_FROM_RECORD_FIELD(cinfo->dest, FileCallback, mgr);
if (!cb->write_error)
{
if ((cb->write_error = (std::fwrite(cb->buffer.get(), 1, BUFFER_SIZE, cb->fp) != BUFFER_SIZE)))
Error::SetErrno(cb->errptr, "fwrite() failed: ", errno);
}
cb->mgr.next_output_byte = cb->buffer.get();
cb->mgr.free_in_buffer = BUFFER_SIZE;
return TRUE;
},
.term_destination =
[](j_compress_ptr cinfo) {
FileCallback* cb = BASE_FROM_RECORD_FIELD(cinfo->dest, FileCallback, mgr);
const size_t left = BUFFER_SIZE - cb->mgr.free_in_buffer;
if (left > 0 && !cb->write_error)
{
if ((cb->write_error = (std::fwrite(cb->buffer.get(), 1, left, cb->fp) != left)))
Error::SetErrno(cb->errptr, "fwrite() failed: ", errno);
}
},
},
.fp = fp,
.buffer = std::make_unique<u8[]>(BUFFER_SIZE),
.errptr = error,
.write_error = false,
};
return (WrapJPEGCompress(image, quality, error, [&cb](jpeg_compress_struct& info) { info.dest = &cb.mgr; }) &&
!cb.write_error);
}
bool WebPBufferLoader(Image* image, std::span<const u8> data, Error* error)
{
int width, height;
if (!WebPGetInfo(data.data(), data.size(), &width, &height) || width <= 0 || height <= 0)
{
Error::SetStringView(error, "WebPGetInfo() failed");
return false;
}
image->Resize(static_cast<u32>(width), static_cast<u32>(height), ImageFormat::RGBA8, false);
if (!WebPDecodeRGBAInto(data.data(), data.size(), image->GetPixels(), image->GetStorageSize(), image->GetPitch()))
{
Error::SetStringView(error, "WebPDecodeRGBAInto() failed");
image->Invalidate();
return false;
}
return true;
}
bool WebPBufferSaver(const Image& image, DynamicHeapArray<u8>* data, u8 quality, Error* error)
{
u8* encoded_data;
const size_t encoded_size =
WebPEncodeRGBA(reinterpret_cast<const u8*>(image.GetPixels()), image.GetWidth(), image.GetHeight(),
image.GetPitch(), static_cast<float>(quality), &encoded_data);
if (encoded_size == 0)
{
Error::SetStringFmt(error, "WebPEncodeRGBA() for {}x{} failed.", image.GetWidth(), image.GetHeight());
return false;
}
data->resize(encoded_size);
std::memcpy(data->data(), encoded_data, encoded_size);
WebPFree(encoded_data);
return true;
}
bool WebPFileLoader(Image* image, std::string_view filename, std::FILE* fp, Error* error)
{
std::optional<DynamicHeapArray<u8>> data = FileSystem::ReadBinaryFile(fp, error);
if (!data.has_value())
return false;
return WebPBufferLoader(image, data->cspan(), error);
}
bool WebPFileSaver(const Image& image, std::string_view filename, std::FILE* fp, u8 quality, Error* error)
{
DynamicHeapArray<u8> buffer;
if (!WebPBufferSaver(image, &buffer, quality, error))
return false;
if (std::fwrite(buffer.data(), buffer.size(), 1, fp) != 1)
{
Error::SetErrno(error, "fwrite() failed: ", errno);
return false;
}
return true;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// DDS Handler
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// From https://raw.githubusercontent.com/Microsoft/DirectXTex/master/DirectXTex/DDS.h
//
// This header defines constants and structures that are useful when parsing
// DDS files. DDS files were originally designed to use several structures
// and constants that are native to DirectDraw and are defined in ddraw.h,
// such as DDSURFACEDESC2 and DDSCAPS2. This file defines similar
// (compatible) constants and structures so that one can use DDS files
// without needing to include ddraw.h.
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// http://go.microsoft.com/fwlink/?LinkId=248926
#pragma pack(push, 1)
static constexpr uint32_t DDS_MAGIC = 0x20534444; // "DDS "
struct DDS_PIXELFORMAT
{
uint32_t dwSize;
uint32_t dwFlags;
uint32_t dwFourCC;
uint32_t dwRGBBitCount;
uint32_t dwRBitMask;
uint32_t dwGBitMask;
uint32_t dwBBitMask;
uint32_t dwABitMask;
};
#define DDS_FOURCC 0x00000004 // DDPF_FOURCC
#define DDS_RGB 0x00000040 // DDPF_RGB
#define DDS_RGBA 0x00000041 // DDPF_RGB | DDPF_ALPHAPIXELS
#define DDS_LUMINANCE 0x00020000 // DDPF_LUMINANCE
#define DDS_LUMINANCEA 0x00020001 // DDPF_LUMINANCE | DDPF_ALPHAPIXELS
#define DDS_ALPHA 0x00000002 // DDPF_ALPHA
#define DDS_PAL8 0x00000020 // DDPF_PALETTEINDEXED8
#define DDS_PAL8A 0x00000021 // DDPF_PALETTEINDEXED8 | DDPF_ALPHAPIXELS
#define DDS_BUMPDUDV 0x00080000 // DDPF_BUMPDUDV
#ifndef MAKEFOURCC
#define MAKEFOURCC(ch0, ch1, ch2, ch3) \
((uint32_t)(uint8_t)(ch0) | ((uint32_t)(uint8_t)(ch1) << 8) | ((uint32_t)(uint8_t)(ch2) << 16) | \
((uint32_t)(uint8_t)(ch3) << 24))
#endif /* defined(MAKEFOURCC) */
#define DDS_HEADER_FLAGS_TEXTURE 0x00001007 // DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT
#define DDS_HEADER_FLAGS_MIPMAP 0x00020000 // DDSD_MIPMAPCOUNT
#define DDS_HEADER_FLAGS_VOLUME 0x00800000 // DDSD_DEPTH
#define DDS_HEADER_FLAGS_PITCH 0x00000008 // DDSD_PITCH
#define DDS_HEADER_FLAGS_LINEARSIZE 0x00080000 // DDSD_LINEARSIZE
#define DDS_MAX_TEXTURE_SIZE 32768
// Subset here matches D3D10_RESOURCE_DIMENSION and D3D11_RESOURCE_DIMENSION
enum DDS_RESOURCE_DIMENSION
{
DDS_DIMENSION_TEXTURE1D = 2,
DDS_DIMENSION_TEXTURE2D = 3,
DDS_DIMENSION_TEXTURE3D = 4,
};
struct DDS_HEADER
{
uint32_t dwSize;
uint32_t dwFlags;
uint32_t dwHeight;
uint32_t dwWidth;
uint32_t dwPitchOrLinearSize;
uint32_t dwDepth; // only if DDS_HEADER_FLAGS_VOLUME is set in dwFlags
uint32_t dwMipMapCount;
uint32_t dwReserved1[11];
DDS_PIXELFORMAT ddspf;
uint32_t dwCaps;
uint32_t dwCaps2;
uint32_t dwCaps3;
uint32_t dwCaps4;
uint32_t dwReserved2;
};
struct DDS_HEADER_DXT10
{
uint32_t dxgiFormat;
uint32_t resourceDimension;
uint32_t miscFlag; // see DDS_RESOURCE_MISC_FLAG
uint32_t arraySize;
uint32_t miscFlags2; // see DDS_MISC_FLAGS2
};
#pragma pack(pop)
static_assert(sizeof(DDS_HEADER) == 124, "DDS Header size mismatch");
static_assert(sizeof(DDS_HEADER_DXT10) == 20, "DDS DX10 Extended Header size mismatch");
constexpr DDS_PIXELFORMAT DDSPF_A8R8G8B8 = {
sizeof(DDS_PIXELFORMAT), DDS_RGBA, 0, 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000};
constexpr DDS_PIXELFORMAT DDSPF_X8R8G8B8 = {
sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x00000000};
constexpr DDS_PIXELFORMAT DDSPF_A8B8G8R8 = {
sizeof(DDS_PIXELFORMAT), DDS_RGBA, 0, 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000};
constexpr DDS_PIXELFORMAT DDSPF_X8B8G8R8 = {
sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0x00000000};
constexpr DDS_PIXELFORMAT DDSPF_R8G8B8 = {
sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 24, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x00000000};
// End of Microsoft code from DDS.h.
static bool DDSPixelFormatMatches(const DDS_PIXELFORMAT& pf1, const DDS_PIXELFORMAT& pf2)
{
return std::tie(pf1.dwSize, pf1.dwFlags, pf1.dwFourCC, pf1.dwRGBBitCount, pf1.dwRBitMask, pf1.dwGBitMask,
pf1.dwGBitMask, pf1.dwBBitMask,
pf1.dwABitMask) == std::tie(pf2.dwSize, pf2.dwFlags, pf2.dwFourCC, pf2.dwRGBBitCount, pf2.dwRBitMask,
pf2.dwGBitMask, pf2.dwGBitMask, pf2.dwBBitMask, pf2.dwABitMask);
}
struct DDSLoadInfo
{
u32 block_size = 1;
u32 bytes_per_block = 4;
u32 width = 0;
u32 height = 0;
u32 mip_count = 0;
ImageFormat format = ImageFormat::RGBA8;
s64 base_image_offset = 0;
u32 base_image_size = 0;
u32 base_image_pitch = 0;
bool clear_alpha = false;
};
template<typename ReadFunction>
static bool ParseDDSHeader(const ReadFunction& RF, DDSLoadInfo* info, Error* error)
{
u32 magic;
if (!RF(&magic, sizeof(magic), error) || magic != DDS_MAGIC)
{
Error::AddPrefix(error, "Failed to read magic: ");
return false;
}
DDS_HEADER header;
u32 header_size = sizeof(header);
if (!RF(&header, header_size, error) || header.dwSize < header_size)
{
Error::AddPrefix(error, "Failed to read header: ");
return false;
}
// We should check for DDS_HEADER_FLAGS_TEXTURE here, but some tools don't seem
// to set it (e.g. compressonator). But we can still validate the size.
if (header.dwWidth == 0 || header.dwWidth >= DDS_MAX_TEXTURE_SIZE || header.dwHeight == 0 ||
header.dwHeight >= DDS_MAX_TEXTURE_SIZE)
{
Error::SetStringFmt(error, "Size is invalid: {}x{}", header.dwWidth, header.dwHeight);
return false;
}
// Image should be 2D.
if (header.dwFlags & DDS_HEADER_FLAGS_VOLUME)
{
Error::SetStringView(error, "Volume textures are not supported.");
return false;
}
// Presence of width/height fields is already tested by DDS_HEADER_FLAGS_TEXTURE.
info->width = header.dwWidth;
info->height = header.dwHeight;
// Check for mip levels.
if (header.dwFlags & DDS_HEADER_FLAGS_MIPMAP)
{
info->mip_count = header.dwMipMapCount;
if (header.dwMipMapCount != 0)
{
info->mip_count = header.dwMipMapCount;
}
else
{
const u32 max_dim = Common::PreviousPow2(std::max(header.dwWidth, header.dwHeight));
info->mip_count = (std::countr_zero(max_dim) + 1);
}
}
else
{
info->mip_count = 1;
}
// Handle fourcc formats vs uncompressed formats.
const bool has_fourcc = (header.ddspf.dwFlags & DDS_FOURCC) != 0;
if (has_fourcc)
{
// Handle DX10 extension header.
u32 dxt10_format = 0;
if (header.ddspf.dwFourCC == MAKEFOURCC('D', 'X', '1', '0'))
{
DDS_HEADER_DXT10 dxt10_header;
if (!RF(&dxt10_header, sizeof(dxt10_header), error))
{
Error::AddPrefix(error, "Failed to read DXT10 header: ");
return false;
}
// Can't handle array textures here. Doesn't make sense to use them, anyway.
if (dxt10_header.resourceDimension != DDS_DIMENSION_TEXTURE2D || dxt10_header.arraySize != 1)
{
Error::SetStringView(error, "Only 2D textures are supported.");
return false;
}
header_size += sizeof(dxt10_header);
dxt10_format = dxt10_header.dxgiFormat;
}
if (header.ddspf.dwFourCC == MAKEFOURCC('D', 'X', 'T', '1') || dxt10_format == 71)
{
info->format = ImageFormat::BC1;
info->block_size = 4;
info->bytes_per_block = 8;
}
else if (header.ddspf.dwFourCC == MAKEFOURCC('D', 'X', 'T', '2') ||
header.ddspf.dwFourCC == MAKEFOURCC('D', 'X', 'T', '3') || dxt10_format == 74)
{
info->format = ImageFormat::BC2;
info->block_size = 4;
info->bytes_per_block = 16;
}
else if (header.ddspf.dwFourCC == MAKEFOURCC('D', 'X', 'T', '4') ||
header.ddspf.dwFourCC == MAKEFOURCC('D', 'X', 'T', '5') || dxt10_format == 77)
{
info->format = ImageFormat::BC3;
info->block_size = 4;
info->bytes_per_block = 16;
}
else if (dxt10_format == 98)
{
info->format = ImageFormat::BC7;
info->block_size = 4;
info->bytes_per_block = 16;
}
else
{
Error::SetStringFmt(error, "Unknown format with FOURCC 0x{:08X} / DXT10 format {}", header.ddspf.dwFourCC,
dxt10_format);
return false;
}
}
else
{
if (DDSPixelFormatMatches(header.ddspf, DDSPF_A8R8G8B8))
{
info->format = ImageFormat::BGRA8;
}
else if (DDSPixelFormatMatches(header.ddspf, DDSPF_X8R8G8B8))
{
info->format = ImageFormat::BGRA8;
info->clear_alpha = true;
}
else if (DDSPixelFormatMatches(header.ddspf, DDSPF_X8B8G8R8))
{
info->format = ImageFormat::RGBA8;
info->clear_alpha = true;
}
else if (DDSPixelFormatMatches(header.ddspf, DDSPF_R8G8B8))
{
info->format = ImageFormat::BGR8;
info->clear_alpha = true;
}
else if (DDSPixelFormatMatches(header.ddspf, DDSPF_A8B8G8R8))
{
info->format = ImageFormat::RGBA8;
}
else
{
Error::SetStringFmt(error, "Unhandled format with FOURCC 0x{:08X}", header.ddspf.dwFourCC);
return false;
}
// All these formats are RGBA, just with byte swapping.
info->block_size = 1;
info->bytes_per_block = header.ddspf.dwRGBBitCount / 8;
}
// Mip levels smaller than the block size are padded to multiples of the block size.
const u32 blocks_wide = Common::AlignUpPow2(info->width, info->block_size) / info->block_size;
const u32 blocks_high = Common::AlignUpPow2(info->height, info->block_size) / info->block_size;
// Pitch can be specified in the header, otherwise we can derive it from the dimensions. For
// compressed formats, both DDS_HEADER_FLAGS_LINEARSIZE and DDS_HEADER_FLAGS_PITCH should be
// set. See https://msdn.microsoft.com/en-us/library/windows/desktop/bb943982(v=vs.85).aspx
if (header.dwFlags & DDS_HEADER_FLAGS_PITCH && header.dwFlags & DDS_HEADER_FLAGS_LINEARSIZE)
{
// Convert pitch (in bytes) to texels/row length.
if (header.dwPitchOrLinearSize < info->bytes_per_block)
{
// Likely a corrupted or invalid file.
Error::SetStringFmt(error, "Invalid pitch: {}", header.dwPitchOrLinearSize);
return false;
}
info->base_image_pitch = header.dwPitchOrLinearSize;
info->base_image_size = info->base_image_pitch * blocks_high;
}
else
{
// Assume no padding between rows of blocks.
info->base_image_pitch = blocks_wide * info->bytes_per_block;
info->base_image_size = info->base_image_pitch * blocks_high;
}
info->base_image_offset = sizeof(magic) + header_size;
#if 0
// D3D11 cannot handle block compressed textures where the first mip level is not a multiple of the block size.
if (mip_level == 0 && info.block_size > 1 && ((width % info.block_size) != 0 || (height % info.block_size) != 0))
{
Error::SetStringFmt(error,
"Invalid dimensions for DDS texture. For compressed textures of this format, "
"the width/height of the first mip level must be a multiple of {}.",
info.block_size);
return false;
}
#endif
return true;
}
bool DDSFileLoader(Image* image, std::string_view path, std::FILE* fp, Error* error)
{
const auto header_reader = [fp](void* buffer, size_t size, Error* error) {
if (std::fread(buffer, size, 1, fp) == 1)
return true;
Error::SetErrno(error, "fread() failed: ", errno);
return false;
};
DDSLoadInfo info;
if (!ParseDDSHeader(header_reader, &info, error))
return false;
// always load the base image
if (!FileSystem::FSeek64(fp, info.base_image_offset, SEEK_SET, error))
return false;
image->Resize(info.width, info.height, info.format, false);
const u32 blocks = image->GetBlocksHigh();
if (image->GetPitch() != info.base_image_pitch)
{
for (u32 y = 0; y < blocks; y++)
{
if (std::fread(image->GetRowPixels(y), info.base_image_pitch, 1, fp) != 1)
{
Error::SetErrno(error, "fread() failed: ", errno);
return false;
}
}
}
else
{
if (std::fread(image->GetPixels(), info.base_image_pitch * blocks, 1, fp) != 1)
{
Error::SetErrno(error, "fread() failed: ", errno);
return false;
}
}
if (info.clear_alpha)
image->SetAllPixelsOpaque();
return true;
}
bool DDSBufferLoader(Image* image, std::span<const u8> data, Error* error)
{
size_t data_pos = 0;
const auto header_reader = [&data, &data_pos](void* buffer, size_t size, Error* error) {
if ((data_pos + size) > data.size())
{
Error::SetStringView(error, "Buffer does not contain sufficient data.");
return false;
}
std::memcpy(buffer, &data[data_pos], size);
data_pos += size;
return true;
};
DDSLoadInfo info;
if (!ParseDDSHeader(header_reader, &info, error))
return false;
if ((static_cast<u64>(info.base_image_offset) + info.base_image_size) > data.size())
{
Error::SetStringFmt(error, "Buffer does not contain complete base image.");
return false;
}
image->SetPixels(info.width, info.height, info.format, &data[static_cast<size_t>(info.base_image_offset)],
info.base_image_pitch);
if (info.clear_alpha)
image->SetAllPixelsOpaque();
return true;
}
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