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metal: implement texture swizzling

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This commit is contained in:
Samuliak
2025-03-11 08:35:35 +01:00
parent 2111c94f1e
commit 1a460d73be
4 changed files with 43 additions and 214 deletions
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216
src/core/renderer_mtl/mtl_texture.cpp
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@@ -21,10 +21,15 @@ namespace Metal {
descriptor->setStorageMode(MTL::StorageModeShared); // TODO: use private + staging buffers?
texture = device->newTexture(descriptor);
texture->setLabel(toNSString(
"Texture " + std::string(PICA::textureFormatToString(format)) + " " + std::to_string(size.u()) + "x" + std::to_string(size.v())
"Base texture " + std::string(PICA::textureFormatToString(format)) + " " + std::to_string(size.u()) + "x" + std::to_string(size.v())
));
descriptor->release();
if (formatInfo.needsSwizzle) {
base = texture;
texture = base->newTextureView(formatInfo.pixelFormat, MTL::TextureType2D, NS::Range(0, 1), NS::Range(0, 1), formatInfo.swizzle);
}
setNewConfig(config);
}
@@ -58,6 +63,9 @@ namespace Metal {
if (texture) {
texture->release();
}
if (base) {
base->release();
}
if (sampler) {
sampler->release();
}
@@ -99,212 +107,6 @@ namespace Metal {
}
}
/*
u8 Texture::decodeTexelU8(u32 u, u32 v, PICA::TextureFmt fmt, std::span<const u8> data) {
switch (fmt) {
case PICA::TextureFmt::A4: {
const u32 offset = getSwizzledOffset_4bpp(u, v, size.u());
// For odd U coordinates, grab the top 4 bits, and the low 4 bits for even coordinates
u8 alpha = data[offset] >> ((u % 2) ? 4 : 0);
alpha = Colour::convert4To8Bit(getBits<0, 4>(alpha));
// A8
return alpha;
}
case PICA::TextureFmt::A8: {
u32 offset = getSwizzledOffset(u, v, size.u(), 1);
const u8 alpha = data[offset];
// A8
return alpha;
}
default: Helpers::panic("[Texture::DecodeTexel] Unimplemented format = %d", static_cast<int>(fmt));
}
}
u16 Texture::decodeTexelU16(u32 u, u32 v, PICA::TextureFmt fmt, std::span<const u8> data) {
switch (fmt) {
case PICA::TextureFmt::RG8: {
u32 offset = getSwizzledOffset(u, v, size.u(), 2);
constexpr u8 b = 0;
const u8 g = data[offset];
const u8 r = data[offset + 1];
// RG8
return (g << 8) | r;
}
case PICA::TextureFmt::RGBA4: {
u32 offset = getSwizzledOffset(u, v, size.u(), 2);
u16 texel = u16(data[offset]) | (u16(data[offset + 1]) << 8);
u8 alpha = getBits<0, 4, u8>(texel);
u8 b = getBits<4, 4, u8>(texel);
u8 g = getBits<8, 4, u8>(texel);
u8 r = getBits<12, 4, u8>(texel);
// ABGR4
return (r << 12) | (g << 8) | (b << 4) | alpha;
}
case PICA::TextureFmt::RGBA5551: {
const u32 offset = getSwizzledOffset(u, v, size.u(), 2);
const u16 texel = u16(data[offset]) | (u16(data[offset + 1]) << 8);
u8 alpha = getBit<0>(texel) ? 0xff : 0;
u8 b = getBits<1, 5, u8>(texel);
u8 g = getBits<6, 5, u8>(texel);
u8 r = getBits<11, 5, u8>(texel);
// BGR5A1
return (alpha << 15) | (r << 10) | (g << 5) | b;
}
case PICA::TextureFmt::RGB565: {
const u32 offset = getSwizzledOffset(u, v, size.u(), 2);
const u16 texel = u16(data[offset]) | (u16(data[offset + 1]) << 8);
const u8 b = getBits<0, 5, u8>(texel);
const u8 g = getBits<5, 6, u8>(texel);
const u8 r = getBits<11, 5, u8>(texel);
// B5G6R5
return (r << 11) | (g << 5) | b;
}
case PICA::TextureFmt::IA4: {
const u32 offset = getSwizzledOffset(u, v, size.u(), 1);
const u8 texel = data[offset];
const u8 alpha = texel & 0xf;
const u8 intensity = texel >> 4;
// ABGR4
return (intensity << 12) | (intensity << 8) | (intensity << 4) | alpha;
}
case PICA::TextureFmt::I4: {
u32 offset = getSwizzledOffset_4bpp(u, v, size.u());
// For odd U coordinates, grab the top 4 bits, and the low 4 bits for even coordinates
u8 intensity = data[offset] >> ((u % 2) ? 4 : 0);
intensity = getBits<0, 4>(intensity);
// ABGR4
return (intensity << 12) | (intensity << 8) | (intensity << 4) | 0xff;
}
default: Helpers::panic("[Texture::DecodeTexel] Unimplemented format = %d", static_cast<int>(fmt));
}
}
u32 Texture::decodeTexelU32(u32 u, u32 v, PICA::TextureFmt fmt, std::span<const u8> data) {
switch (fmt) {
case PICA::TextureFmt::RGB8: {
const u32 offset = getSwizzledOffset(u, v, size.u(), 3);
const u8 b = data[offset];
const u8 g = data[offset + 1];
const u8 r = data[offset + 2];
// RGBA8
return (0xff << 24) | (b << 16) | (g << 8) | r;
}
case PICA::TextureFmt::RGBA8: {
const u32 offset = getSwizzledOffset(u, v, size.u(), 4);
const u8 alpha = data[offset];
const u8 b = data[offset + 1];
const u8 g = data[offset + 2];
const u8 r = data[offset + 3];
// RGBA8
return (alpha << 24) | (b << 16) | (g << 8) | r;
}
case PICA::TextureFmt::ETC1: return getTexelETC(false, u, v, size.u(), data);
case PICA::TextureFmt::ETC1A4: return getTexelETC(true, u, v, size.u(), data);
case PICA::TextureFmt::RGBA4: {
u32 offset = getSwizzledOffset(u, v, size.u(), 2);
u16 texel = u16(data[offset]) | (u16(data[offset + 1]) << 8);
u8 alpha = Colour::convert4To8Bit(getBits<0, 4, u8>(texel));
u8 b = Colour::convert4To8Bit(getBits<4, 4, u8>(texel));
u8 g = Colour::convert4To8Bit(getBits<8, 4, u8>(texel));
u8 r = Colour::convert4To8Bit(getBits<12, 4, u8>(texel));
return (alpha << 24) | (b << 16) | (g << 8) | r;
}
case PICA::TextureFmt::I4: {
u32 offset = getSwizzledOffset_4bpp(u, v, size.u());
// For odd U coordinates, grab the top 4 bits, and the low 4 bits for even coordinates
u8 intensity = data[offset] >> ((u % 2) ? 4 : 0);
intensity = Colour::convert4To8Bit(getBits<0, 4>(intensity));
// Intensity formats just copy the intensity value to every colour channel
return (0xff << 24) | (intensity << 16) | (intensity << 8) | intensity;
}
case PICA::TextureFmt::IA4: {
const u32 offset = getSwizzledOffset(u, v, size.u(), 1);
const u8 texel = data[offset];
const u8 alpha = Colour::convert4To8Bit(texel & 0xf);
const u8 intensity = Colour::convert4To8Bit(texel >> 4);
// Intensity formats just copy the intensity value to every colour channel
return (alpha << 24) | (intensity << 16) | (intensity << 8) | intensity;
}
case PICA::TextureFmt::A4: {
const u32 offset = getSwizzledOffset_4bpp(u, v, size.u());
// For odd U coordinates, grab the top 4 bits, and the low 4 bits for even coordinates
u8 alpha = data[offset] >> ((u % 2) ? 4 : 0);
alpha = Colour::convert4To8Bit(getBits<0, 4>(alpha));
// A8 sets RGB to 0
return (alpha << 24) | (0 << 16) | (0 << 8) | 0;
}
case PICA::TextureFmt::I8: {
u32 offset = getSwizzledOffset(u, v, size.u(), 1);
const u8 intensity = data[offset];
// RGBA8
return (0xff << 24) | (intensity << 16) | (intensity << 8) | intensity;
}
case PICA::TextureFmt::IA8: {
u32 offset = getSwizzledOffset(u, v, size.u(), 2);
// Same as I8 except each pixel gets its own alpha value too
const u8 alpha = data[offset];
const u8 intensity = data[offset + 1];
// RGBA8
return (alpha << 24) | (intensity << 16) | (intensity << 8) | intensity;
}
case PICA::TextureFmt::RGB565: {
const u32 offset = getSwizzledOffset(u, v, size.u(), 2);
const u16 texel = u16(data[offset]) | (u16(data[offset + 1]) << 8);
const u8 b = Colour::convert5To8Bit(getBits<0, 5, u8>(texel));
const u8 g = Colour::convert6To8Bit(getBits<5, 6, u8>(texel));
const u8 r = Colour::convert5To8Bit(getBits<11, 5, u8>(texel));
return (0xff << 24) | (b << 16) | (g << 8) | r;
}
default: Helpers::panic("[Texture::DecodeTexel] Unimplemented format = %d", static_cast<int>(fmt));
}
}
*/
void Texture::decodeTexture(std::span<const u8> data) {
std::vector<u8> decoded;
decoded.reserve(u64(size.u()) * u64(size.v()) * formatInfo.bytesPerTexel);