aurora/lib/gfx/texture_convert.cpp

605 lines
18 KiB
C++

#include "texture_convert.hpp"
#include "../internal.hpp"
namespace aurora::gfx {
static Module Log("aurora::gfx");
struct RGBA8 {
uint8_t r;
uint8_t g;
uint8_t b;
uint8_t a;
};
struct DXT1Block {
uint16_t color1;
uint16_t color2;
std::array<uint8_t, 4> lines;
};
// http://www.mindcontrol.org/~hplus/graphics/expand-bits.html
template <uint8_t v>
constexpr uint8_t ExpandTo8(uint8_t n) {
if constexpr (v == 3) {
return (n << (8 - 3)) | (n << (8 - 6)) | (n >> (9 - 8));
} else {
return (n << (8 - v)) | (n >> ((v * 2) - 8));
}
}
constexpr uint8_t S3TCBlend(uint32_t a, uint32_t b) {
return static_cast<uint8_t>((((a << 1) + a) + ((b << 2) + b)) >> 3);
}
constexpr uint8_t HalfBlend(uint8_t a, uint8_t b) {
return static_cast<uint8_t>((static_cast<uint32_t>(a) + static_cast<uint32_t>(b)) >> 1);
}
static size_t ComputeMippedTexelCount(uint32_t w, uint32_t h, uint32_t mips) {
size_t ret = w * h;
for (uint32_t i = mips; i > 1; --i) {
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
ret += w * h;
}
return ret;
}
static size_t ComputeMippedBlockCountDXT1(uint32_t w, uint32_t h, uint32_t mips) {
w /= 4;
h /= 4;
size_t ret = w * h;
for (uint32_t i = mips; i > 1; --i) {
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
ret += w * h;
}
return ret;
}
template <typename T>
constexpr T bswap16(T val) noexcept {
#if __GNUC__
return __builtin_bswap16(val);
#elif _WIN32
return _byteswap_ushort(val);
#else
return (val = (val << 8) | ((val >> 8) & 0xFF));
#endif
}
static ByteBuffer BuildI4FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
ByteBuffer buf{texelCount};
uint32_t w = width;
uint32_t h = height;
uint8_t* targetMip = buf.data();
const uint8_t* in = data.data();
for (uint32_t mip = 0; mip < mips; ++mip) {
const uint32_t bwidth = (w + 7) / 8;
const uint32_t bheight = (h + 7) / 8;
for (uint32_t by = 0; by < bheight; ++by) {
const uint32_t baseY = by * 8;
for (uint32_t bx = 0; bx < bwidth; ++bx) {
const uint32_t baseX = bx * 8;
for (uint32_t y = 0; y < std::min(h, 8u); ++y) {
uint8_t* target = targetMip + (baseY + y) * w + baseX;
for (uint32_t x = 0; x < std::min(w, 8u); ++x) {
target[x] = ExpandTo8<4>(in[x / 2] >> ((x & 1) ? 0 : 4) & 0xf);
}
in += std::min<size_t>(w / 4, 4);
}
}
}
targetMip += w * h;
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
}
return buf;
}
static ByteBuffer BuildI8FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
ByteBuffer buf{texelCount};
uint32_t w = width;
uint32_t h = height;
auto* targetMip = buf.data();
const uint8_t* in = data.data();
for (uint32_t mip = 0; mip < mips; ++mip) {
const uint32_t bwidth = (w + 7) / 8;
const uint32_t bheight = (h + 3) / 4;
for (uint32_t by = 0; by < bheight; ++by) {
const uint32_t baseY = by * 4;
for (uint32_t bx = 0; bx < bwidth; ++bx) {
const uint32_t baseX = bx * 8;
for (uint32_t y = 0; y < 4; ++y) {
uint8_t* target = targetMip + (baseY + y) * w + baseX;
const auto n = std::min(w, 8u);
for (size_t x = 0; x < n; ++x) {
target[x] = in[x];
}
in += n;
}
}
}
targetMip += w * h;
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
}
return buf;
}
ByteBuffer BuildIA4FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
ByteBuffer buf{sizeof(RGBA8) * texelCount};
uint32_t w = width;
uint32_t h = height;
RGBA8* targetMip = reinterpret_cast<RGBA8*>(buf.data());
const uint8_t* in = data.data();
for (uint32_t mip = 0; mip < mips; ++mip) {
const uint32_t bwidth = (w + 7) / 8;
const uint32_t bheight = (h + 3) / 4;
for (uint32_t by = 0; by < bheight; ++by) {
const uint32_t baseY = by * 4;
for (uint32_t bx = 0; bx < bwidth; ++bx) {
const uint32_t baseX = bx * 8;
for (uint32_t y = 0; y < 4; ++y) {
RGBA8* target = targetMip + (baseY + y) * w + baseX;
const auto n = std::min(w, 8u);
for (size_t x = 0; x < n; ++x) {
const uint8_t intensity = ExpandTo8<4>(in[x] & 0xf);
target[x].r = intensity;
target[x].g = intensity;
target[x].b = intensity;
target[x].a = ExpandTo8<4>(in[x] >> 4);
}
in += n;
}
}
}
targetMip += w * h;
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
}
return buf;
}
ByteBuffer BuildIA8FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
ByteBuffer buf{sizeof(RGBA8) * texelCount};
uint32_t w = width;
uint32_t h = height;
auto* targetMip = reinterpret_cast<RGBA8*>(buf.data());
const auto* in = reinterpret_cast<const uint16_t*>(data.data());
for (uint32_t mip = 0; mip < mips; ++mip) {
const uint32_t bwidth = (w + 3) / 4;
const uint32_t bheight = (h + 3) / 4;
for (uint32_t by = 0; by < bheight; ++by) {
const uint32_t baseY = by * 4;
for (uint32_t bx = 0; bx < bwidth; ++bx) {
const uint32_t baseX = bx * 4;
for (uint32_t y = 0; y < 4; ++y) {
RGBA8* target = targetMip + (baseY + y) * w + baseX;
for (size_t x = 0; x < 4; ++x) {
const auto texel = bswap16(in[x]);
const uint8_t intensity = texel >> 8;
target[x].r = intensity;
target[x].g = intensity;
target[x].b = intensity;
target[x].a = texel & 0xff;
}
in += 4;
}
}
}
targetMip += w * h;
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
}
return buf;
}
ByteBuffer BuildC4FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
ByteBuffer buf{texelCount * 2};
uint32_t w = width;
uint32_t h = height;
uint16_t* targetMip = reinterpret_cast<uint16_t*>(buf.data());
const uint8_t* in = data.data();
for (uint32_t mip = 0; mip < mips; ++mip) {
const uint32_t bwidth = (w + 7) / 8;
const uint32_t bheight = (h + 7) / 8;
for (uint32_t by = 0; by < bheight; ++by) {
const uint32_t baseY = by * 8;
for (uint32_t bx = 0; bx < bwidth; ++bx) {
const uint32_t baseX = bx * 8;
for (uint32_t y = 0; y < std::min(8u, h); ++y) {
uint16_t* target = targetMip + (baseY + y) * w + baseX;
const auto n = std::min(w, 8u);
for (size_t x = 0; x < n; ++x) {
target[x] = in[x / 2] >> ((x & 1) ? 0 : 4) & 0xf;
}
in += n / 2;
}
}
}
targetMip += w * h;
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
}
return buf;
}
ByteBuffer BuildC8FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
ByteBuffer buf{texelCount * 2};
uint32_t w = width;
uint32_t h = height;
uint16_t* targetMip = reinterpret_cast<uint16_t*>(buf.data());
const uint8_t* in = data.data();
for (uint32_t mip = 0; mip < mips; ++mip) {
const uint32_t bwidth = (w + 7) / 8;
const uint32_t bheight = (h + 3) / 4;
for (uint32_t by = 0; by < bheight; ++by) {
const uint32_t baseY = by * 4;
for (uint32_t bx = 0; bx < bwidth; ++bx) {
const uint32_t baseX = bx * 8;
for (uint32_t y = 0; y < 4; ++y) {
uint16_t* target = targetMip + (baseY + y) * w + baseX;
const auto n = std::min(w, 8u);
for (size_t x = 0; x < n; ++x) {
target[x] = in[x];
}
in += n;
}
}
}
targetMip += w * h;
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
}
return buf;
}
ByteBuffer BuildRGB565FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
ByteBuffer buf{sizeof(RGBA8) * texelCount};
uint32_t w = width;
uint32_t h = height;
auto* targetMip = reinterpret_cast<RGBA8*>(buf.data());
const auto* in = reinterpret_cast<const uint16_t*>(data.data());
for (uint32_t mip = 0; mip < mips; ++mip) {
const uint32_t bwidth = (w + 3) / 4;
const uint32_t bheight = (h + 3) / 4;
for (uint32_t by = 0; by < bheight; ++by) {
const uint32_t baseY = by * 4;
for (uint32_t bx = 0; bx < bwidth; ++bx) {
const uint32_t baseX = bx * 4;
for (uint32_t y = 0; y < std::min(4u, h); ++y) {
RGBA8* target = targetMip + (baseY + y) * w + baseX;
for (size_t x = 0; x < std::min(4u, w); ++x) {
const auto texel = bswap16(in[x]);
target[x].r = ExpandTo8<5>(texel >> 11 & 0x1f);
target[x].g = ExpandTo8<6>(texel >> 5 & 0x3f);
target[x].b = ExpandTo8<5>(texel & 0x1f);
target[x].a = 0xff;
}
in += 4;
}
}
}
targetMip += w * h;
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
}
return buf;
}
ByteBuffer BuildRGB5A3FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
size_t texelCount = ComputeMippedTexelCount(width, height, mips);
ByteBuffer buf{sizeof(RGBA8) * texelCount};
uint32_t w = width;
uint32_t h = height;
auto* targetMip = reinterpret_cast<RGBA8*>(buf.data());
const auto* in = reinterpret_cast<const uint16_t*>(data.data());
for (uint32_t mip = 0; mip < mips; ++mip) {
const uint32_t bwidth = (w + 3) / 4;
const uint32_t bheight = (h + 3) / 4;
for (uint32_t by = 0; by < bheight; ++by) {
const uint32_t baseY = by * 4;
for (uint32_t bx = 0; bx < bwidth; ++bx) {
const uint32_t baseX = bx * 4;
for (uint32_t y = 0; y < std::min(4u, h); ++y) {
RGBA8* target = targetMip + (baseY + y) * w + baseX;
for (size_t x = 0; x < std::min(4u, w); ++x) {
const auto texel = bswap16(in[x]);
if ((texel & 0x8000) != 0) {
target[x].r = ExpandTo8<5>(texel >> 10 & 0x1f);
target[x].g = ExpandTo8<5>(texel >> 5 & 0x1f);
target[x].b = ExpandTo8<5>(texel & 0x1f);
target[x].a = 0xff;
} else {
target[x].r = ExpandTo8<4>(texel >> 8 & 0xf);
target[x].g = ExpandTo8<4>(texel >> 4 & 0xf);
target[x].b = ExpandTo8<4>(texel & 0xf);
target[x].a = ExpandTo8<3>(texel >> 12 & 0x7);
}
}
in += 4;
}
}
}
targetMip += w * h;
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
}
return buf;
}
ByteBuffer BuildRGBA8FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
ByteBuffer buf{sizeof(RGBA8) * texelCount};
uint32_t w = width;
uint32_t h = height;
auto* targetMip = reinterpret_cast<RGBA8*>(buf.data());
const uint8_t* in = data.data();
for (uint32_t mip = 0; mip < mips; ++mip) {
const uint32_t bwidth = (w + 3) / 4;
const uint32_t bheight = (h + 3) / 4;
for (uint32_t by = 0; by < bheight; ++by) {
const uint32_t baseY = by * 4;
for (uint32_t bx = 0; bx < bwidth; ++bx) {
const uint32_t baseX = bx * 4;
for (uint32_t c = 0; c < 2; ++c) {
for (uint32_t y = 0; y < 4; ++y) {
RGBA8* target = targetMip + (baseY + y) * w + baseX;
for (size_t x = 0; x < 4; ++x) {
if (c != 0) {
target[x].g = in[x * 2];
target[x].b = in[x * 2 + 1];
} else {
target[x].a = in[x * 2];
target[x].r = in[x * 2 + 1];
}
}
in += 8;
}
}
}
}
targetMip += w * h;
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
}
return buf;
}
ByteBuffer BuildDXT1FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
const size_t blockCount = ComputeMippedBlockCountDXT1(width, height, mips);
ByteBuffer buf{sizeof(DXT1Block) * blockCount};
uint32_t w = width / 4;
uint32_t h = height / 4;
auto* targetMip = reinterpret_cast<DXT1Block*>(buf.data());
const auto* in = reinterpret_cast<const DXT1Block*>(data.data());
for (uint32_t mip = 0; mip < mips; ++mip) {
const uint32_t bwidth = (w + 1) / 2;
const uint32_t bheight = (h + 1) / 2;
for (uint32_t by = 0; by < bheight; ++by) {
const uint32_t baseY = by * 2;
for (uint32_t bx = 0; bx < bwidth; ++bx) {
const uint32_t baseX = bx * 2;
for (uint32_t y = 0; y < 2; ++y) {
DXT1Block* target = targetMip + (baseY + y) * w + baseX;
for (size_t x = 0; x < 2; ++x) {
target[x].color1 = bswap16(in[x].color1);
target[x].color2 = bswap16(in[x].color2);
for (size_t i = 0; i < 4; ++i) {
std::array<uint8_t, 4> ind;
const uint8_t packed = in[x].lines[i];
ind[3] = packed & 0x3;
ind[2] = (packed >> 2) & 0x3;
ind[1] = (packed >> 4) & 0x3;
ind[0] = (packed >> 6) & 0x3;
target[x].lines[i] = ind[0] | (ind[1] << 2) | (ind[2] << 4) | (ind[3] << 6);
}
}
in += 2;
}
}
}
targetMip += w * h;
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
}
return buf;
}
ByteBuffer BuildRGBA8FromCMPR(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
const size_t blockCount = ComputeMippedBlockCountDXT1(width, height, mips);
ByteBuffer buf{sizeof(RGBA8) * texelCount};
uint32_t h = height;
uint32_t w = width;
uint8_t* dst = buf.data();
const uint8_t* src = data.data();
for (uint32_t mip = 0; mip < mips; ++mip) {
for (uint32_t yy = 0; yy < h; yy += 8) {
for (uint32_t xx = 0; xx < w; xx += 8) {
for (uint32_t yb = 0; yb < 8; yb += 4) {
for (uint32_t xb = 0; xb < 8; xb += 4) {
// CMPR difference: Big-endian color1/2
const uint16_t color1 = bswap16(*reinterpret_cast<const uint16_t*>(src));
const uint16_t color2 = bswap16(*reinterpret_cast<const uint16_t*>(src + 2));
src += 4;
// Fill in first two colors in color table.
std::array<uint8_t, 16> color_table{};
color_table[0] = ExpandTo8<5>(static_cast<uint8_t>((color1 >> 11) & 0x1F));
color_table[1] = ExpandTo8<6>(static_cast<uint8_t>((color1 >> 5) & 0x3F));
color_table[2] = ExpandTo8<5>(static_cast<uint8_t>(color1 & 0x1F));
color_table[3] = 0xFF;
color_table[4] = ExpandTo8<5>(static_cast<uint8_t>((color2 >> 11) & 0x1F));
color_table[5] = ExpandTo8<6>(static_cast<uint8_t>((color2 >> 5) & 0x3F));
color_table[6] = ExpandTo8<5>(static_cast<uint8_t>(color2 & 0x1F));
color_table[7] = 0xFF;
if (color1 > color2) {
// Predict gradients.
color_table[8] = S3TCBlend(color_table[4], color_table[0]);
color_table[9] = S3TCBlend(color_table[5], color_table[1]);
color_table[10] = S3TCBlend(color_table[6], color_table[2]);
color_table[11] = 0xFF;
color_table[12] = S3TCBlend(color_table[0], color_table[4]);
color_table[13] = S3TCBlend(color_table[1], color_table[5]);
color_table[14] = S3TCBlend(color_table[2], color_table[6]);
color_table[15] = 0xFF;
} else {
color_table[8] = HalfBlend(color_table[0], color_table[4]);
color_table[9] = HalfBlend(color_table[1], color_table[5]);
color_table[10] = HalfBlend(color_table[2], color_table[6]);
color_table[11] = 0xFF;
// CMPR difference: GX fills with an alpha 0 midway point here.
color_table[12] = color_table[8];
color_table[13] = color_table[9];
color_table[14] = color_table[10];
color_table[15] = 0;
}
for (uint32_t y = 0; y < 4; ++y) {
uint8_t bits = src[y];
for (uint32_t x = 0; x < 4; ++x) {
if (xx + xb + x >= w || yy + yb + y >= h) {
continue;
}
uint8_t* dstOffs = dst + ((yy + yb + y) * w + (xx + xb + x)) * 4;
const uint8_t* colorTableOffs = &color_table[static_cast<size_t>((bits >> 6) & 3) * 4];
memcpy(dstOffs, colorTableOffs, 4);
bits <<= 2;
}
}
src += 4;
}
}
}
}
dst += w * h * 4;
if (w > 1) {
w /= 2;
}
if (h > 1) {
h /= 2;
}
}
return buf;
}
ByteBuffer convert_texture(u32 format, uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
switch (format) {
DEFAULT_FATAL("convert_texture: unknown texture format {}", format);
case GX_TF_R8_PC:
case GX_TF_RGBA8_PC:
return {}; // No conversion
case GX_TF_I4:
return BuildI4FromGCN(width, height, mips, data);
case GX_TF_I8:
return BuildI8FromGCN(width, height, mips, data);
case GX_TF_IA4:
return BuildIA4FromGCN(width, height, mips, data);
case GX_TF_IA8:
return BuildIA8FromGCN(width, height, mips, data);
case GX_TF_C4:
return BuildC4FromGCN(width, height, mips, data);
case GX_TF_C8:
return BuildC8FromGCN(width, height, mips, data);
case GX_TF_C14X2:
FATAL("convert_texture: C14X2 unimplemented");
case GX_TF_RGB565:
return BuildRGB565FromGCN(width, height, mips, data);
case GX_TF_RGB5A3:
return BuildRGB5A3FromGCN(width, height, mips, data);
case GX_TF_RGBA8:
return BuildRGBA8FromGCN(width, height, mips, data);
case GX_TF_CMPR:
if (webgpu::g_device.HasFeature(wgpu::FeatureName::TextureCompressionBC)) {
return BuildDXT1FromGCN(width, height, mips, data);
} else {
return BuildRGBA8FromCMPR(width, height, mips, data);
}
}
}
} // namespace aurora::gfx