mirror of https://github.com/encounter/aurora.git
608 lines
19 KiB
C++
608 lines
19 KiB
C++
#include "texture_convert.hpp"
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#include "../internal.hpp"
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namespace aurora::gfx {
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static Module Log("aurora::gfx");
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struct RGBA8 {
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uint8_t r;
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uint8_t g;
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uint8_t b;
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uint8_t a;
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};
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struct DXT1Block {
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uint16_t color1;
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uint16_t color2;
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std::array<uint8_t, 4> lines;
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};
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// http://www.mindcontrol.org/~hplus/graphics/expand-bits.html
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template <uint8_t v>
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constexpr uint8_t ExpandTo8(uint8_t n) {
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if constexpr (v == 3) {
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return (n << (8 - 3)) | (n << (8 - 6)) | (n >> (9 - 8));
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} else {
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return (n << (8 - v)) | (n >> ((v * 2) - 8));
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}
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}
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constexpr uint8_t S3TCBlend(uint32_t a, uint32_t b) {
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return static_cast<uint8_t>((((a << 1) + a) + ((b << 2) + b)) >> 3);
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}
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constexpr uint8_t HalfBlend(uint8_t a, uint8_t b) {
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return static_cast<uint8_t>((static_cast<uint32_t>(a) + static_cast<uint32_t>(b)) >> 1);
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}
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static size_t ComputeMippedTexelCount(uint32_t w, uint32_t h, uint32_t mips) {
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size_t ret = w * h;
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for (uint32_t i = mips; i > 1; --i) {
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if (w > 1) {
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w /= 2;
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}
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if (h > 1) {
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h /= 2;
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}
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ret += w * h;
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}
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return ret;
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}
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static size_t ComputeMippedBlockCountDXT1(uint32_t w, uint32_t h, uint32_t mips) {
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w /= 4;
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h /= 4;
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size_t ret = w * h;
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for (uint32_t i = mips; i > 1; --i) {
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if (w > 1) {
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w /= 2;
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}
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if (h > 1) {
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h /= 2;
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}
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ret += w * h;
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}
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return ret;
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}
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template <typename T>
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constexpr T bswap16(T val) noexcept {
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#if __GNUC__
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return __builtin_bswap16(val);
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#elif _WIN32
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return _byteswap_ushort(val);
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#else
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return (val = (val << 8) | ((val >> 8) & 0xFF));
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#endif
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}
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static ByteBuffer BuildI4FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
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const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
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ByteBuffer buf{texelCount};
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uint32_t w = width;
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uint32_t h = height;
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uint8_t* targetMip = buf.data();
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const uint8_t* in = data.data();
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for (uint32_t mip = 0; mip < mips; ++mip) {
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const uint32_t bwidth = (w + 7) / 8;
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const uint32_t bheight = (h + 7) / 8;
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for (uint32_t by = 0; by < bheight; ++by) {
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const uint32_t baseY = by * 8;
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for (uint32_t bx = 0; bx < bwidth; ++bx) {
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const uint32_t baseX = bx * 8;
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for (uint32_t y = 0; y < std::min(h, 8u); ++y) {
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uint8_t* target = targetMip + (baseY + y) * w + baseX;
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for (uint32_t x = 0; x < std::min(w, 8u); ++x) {
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target[x] = ExpandTo8<4>(in[x / 2] >> ((x & 1) ? 0 : 4) & 0xf);
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}
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in += std::min<size_t>(w / 4, 4);
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}
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}
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}
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targetMip += w * h;
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if (w > 1) {
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w /= 2;
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}
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if (h > 1) {
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h /= 2;
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}
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}
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return buf;
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}
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static ByteBuffer BuildI8FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
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const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
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ByteBuffer buf{texelCount};
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uint32_t w = width;
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uint32_t h = height;
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auto* targetMip = buf.data();
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const uint8_t* in = data.data();
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for (uint32_t mip = 0; mip < mips; ++mip) {
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const uint32_t bwidth = (w + 7) / 8;
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const uint32_t bheight = (h + 3) / 4;
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for (uint32_t by = 0; by < bheight; ++by) {
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const uint32_t baseY = by * 4;
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for (uint32_t bx = 0; bx < bwidth; ++bx) {
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const uint32_t baseX = bx * 8;
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for (uint32_t y = 0; y < 4; ++y) {
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uint8_t* target = targetMip + (baseY + y) * w + baseX;
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const auto n = std::min(w, 8u);
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for (size_t x = 0; x < n; ++x) {
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target[x] = in[x];
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}
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in += n;
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}
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}
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}
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targetMip += w * h;
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if (w > 1) {
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w /= 2;
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}
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if (h > 1) {
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h /= 2;
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}
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}
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return buf;
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}
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ByteBuffer BuildIA4FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
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const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
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ByteBuffer buf{sizeof(RGBA8) * texelCount};
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uint32_t w = width;
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uint32_t h = height;
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RGBA8* targetMip = reinterpret_cast<RGBA8*>(buf.data());
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const uint8_t* in = data.data();
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for (uint32_t mip = 0; mip < mips; ++mip) {
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const uint32_t bwidth = (w + 7) / 8;
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const uint32_t bheight = (h + 3) / 4;
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for (uint32_t by = 0; by < bheight; ++by) {
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const uint32_t baseY = by * 4;
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for (uint32_t bx = 0; bx < bwidth; ++bx) {
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const uint32_t baseX = bx * 8;
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for (uint32_t y = 0; y < 4; ++y) {
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RGBA8* target = targetMip + (baseY + y) * w + baseX;
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const auto n = std::min(w, 8u);
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for (size_t x = 0; x < n; ++x) {
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const uint8_t intensity = ExpandTo8<4>(in[x] & 0xf);
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target[x].r = intensity;
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target[x].g = intensity;
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target[x].b = intensity;
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target[x].a = ExpandTo8<4>(in[x] >> 4);
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}
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in += n;
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}
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}
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}
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targetMip += w * h;
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if (w > 1) {
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w /= 2;
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}
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if (h > 1) {
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h /= 2;
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}
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}
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return buf;
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}
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ByteBuffer BuildIA8FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
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const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
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ByteBuffer buf{sizeof(RGBA8) * texelCount};
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uint32_t w = width;
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uint32_t h = height;
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auto* targetMip = reinterpret_cast<RGBA8*>(buf.data());
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const auto* in = reinterpret_cast<const uint16_t*>(data.data());
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for (uint32_t mip = 0; mip < mips; ++mip) {
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const uint32_t bwidth = (w + 3) / 4;
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const uint32_t bheight = (h + 3) / 4;
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for (uint32_t by = 0; by < bheight; ++by) {
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const uint32_t baseY = by * 4;
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for (uint32_t bx = 0; bx < bwidth; ++bx) {
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const uint32_t baseX = bx * 4;
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for (uint32_t y = 0; y < 4; ++y) {
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RGBA8* target = targetMip + (baseY + y) * w + baseX;
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for (size_t x = 0; x < 4; ++x) {
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const auto texel = bswap16(in[x]);
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const uint8_t intensity = texel >> 8;
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target[x].r = intensity;
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target[x].g = intensity;
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target[x].b = intensity;
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target[x].a = texel & 0xff;
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}
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in += 4;
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}
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}
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}
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targetMip += w * h;
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if (w > 1) {
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w /= 2;
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}
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if (h > 1) {
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h /= 2;
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}
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}
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return buf;
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}
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ByteBuffer BuildC4FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
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const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
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ByteBuffer buf{texelCount * 2};
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uint32_t w = width;
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uint32_t h = height;
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uint16_t* targetMip = reinterpret_cast<uint16_t*>(buf.data());
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const uint8_t* in = data.data();
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for (uint32_t mip = 0; mip < mips; ++mip) {
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const uint32_t bwidth = (w + 7) / 8;
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const uint32_t bheight = (h + 7) / 8;
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for (uint32_t by = 0; by < bheight; ++by) {
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const uint32_t baseY = by * 8;
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for (uint32_t bx = 0; bx < bwidth; ++bx) {
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const uint32_t baseX = bx * 8;
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for (uint32_t y = 0; y < std::min(8u, h); ++y) {
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uint16_t* target = targetMip + (baseY + y) * w + baseX;
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const auto n = std::min(w, 8u);
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for (size_t x = 0; x < n; ++x) {
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target[x] = in[x / 2] >> ((x & 1) ? 0 : 4) & 0xf;
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}
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in += n / 2;
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}
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}
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}
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targetMip += w * h;
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if (w > 1) {
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w /= 2;
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}
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if (h > 1) {
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h /= 2;
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}
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}
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return buf;
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}
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ByteBuffer BuildC8FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
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const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
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ByteBuffer buf{texelCount * 2};
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uint32_t w = width;
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uint32_t h = height;
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uint16_t* targetMip = reinterpret_cast<uint16_t*>(buf.data());
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const uint8_t* in = data.data();
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for (uint32_t mip = 0; mip < mips; ++mip) {
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const uint32_t bwidth = (w + 7) / 8;
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const uint32_t bheight = (h + 3) / 4;
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for (uint32_t by = 0; by < bheight; ++by) {
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const uint32_t baseY = by * 4;
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for (uint32_t bx = 0; bx < bwidth; ++bx) {
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const uint32_t baseX = bx * 8;
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for (uint32_t y = 0; y < 4; ++y) {
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uint16_t* target = targetMip + (baseY + y) * w + baseX;
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const auto n = std::min(w, 8u);
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for (size_t x = 0; x < n; ++x) {
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target[x] = in[x];
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}
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in += n;
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}
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}
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}
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targetMip += w * h;
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if (w > 1) {
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w /= 2;
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}
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if (h > 1) {
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h /= 2;
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}
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}
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return buf;
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}
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ByteBuffer BuildRGB565FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
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const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
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ByteBuffer buf{sizeof(RGBA8) * texelCount};
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uint32_t w = width;
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uint32_t h = height;
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auto* targetMip = reinterpret_cast<RGBA8*>(buf.data());
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const auto* in = reinterpret_cast<const uint16_t*>(data.data());
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for (uint32_t mip = 0; mip < mips; ++mip) {
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const uint32_t bwidth = (w + 3) / 4;
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const uint32_t bheight = (h + 3) / 4;
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for (uint32_t by = 0; by < bheight; ++by) {
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const uint32_t baseY = by * 4;
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for (uint32_t bx = 0; bx < bwidth; ++bx) {
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const uint32_t baseX = bx * 4;
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for (uint32_t y = 0; y < std::min(4u, h); ++y) {
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RGBA8* target = targetMip + (baseY + y) * w + baseX;
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for (size_t x = 0; x < std::min(4u, w); ++x) {
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const auto texel = bswap16(in[x]);
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target[x].r = ExpandTo8<5>(texel >> 11 & 0x1f);
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target[x].g = ExpandTo8<6>(texel >> 5 & 0x3f);
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target[x].b = ExpandTo8<5>(texel & 0x1f);
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target[x].a = 0xff;
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}
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in += 4;
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}
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}
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}
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targetMip += w * h;
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if (w > 1) {
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w /= 2;
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}
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if (h > 1) {
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h /= 2;
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}
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}
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return buf;
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}
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ByteBuffer BuildRGB5A3FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
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size_t texelCount = ComputeMippedTexelCount(width, height, mips);
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ByteBuffer buf{sizeof(RGBA8) * texelCount};
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uint32_t w = width;
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uint32_t h = height;
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auto* targetMip = reinterpret_cast<RGBA8*>(buf.data());
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const auto* in = reinterpret_cast<const uint16_t*>(data.data());
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for (uint32_t mip = 0; mip < mips; ++mip) {
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const uint32_t bwidth = (w + 3) / 4;
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const uint32_t bheight = (h + 3) / 4;
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for (uint32_t by = 0; by < bheight; ++by) {
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const uint32_t baseY = by * 4;
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for (uint32_t bx = 0; bx < bwidth; ++bx) {
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const uint32_t baseX = bx * 4;
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for (uint32_t y = 0; y < std::min(4u, h); ++y) {
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RGBA8* target = targetMip + (baseY + y) * w + baseX;
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for (size_t x = 0; x < std::min(4u, w); ++x) {
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const auto texel = bswap16(in[x]);
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if ((texel & 0x8000) != 0) {
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target[x].r = ExpandTo8<5>(texel >> 10 & 0x1f);
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target[x].g = ExpandTo8<5>(texel >> 5 & 0x1f);
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target[x].b = ExpandTo8<5>(texel & 0x1f);
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target[x].a = 0xff;
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} else {
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target[x].r = ExpandTo8<4>(texel >> 8 & 0xf);
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target[x].g = ExpandTo8<4>(texel >> 4 & 0xf);
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target[x].b = ExpandTo8<4>(texel & 0xf);
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target[x].a = ExpandTo8<3>(texel >> 12 & 0x7);
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}
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}
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in += 4;
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}
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}
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}
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targetMip += w * h;
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if (w > 1) {
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w /= 2;
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}
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if (h > 1) {
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h /= 2;
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}
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}
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return buf;
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}
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ByteBuffer BuildRGBA8FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
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const size_t texelCount = ComputeMippedTexelCount(width, height, mips);
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ByteBuffer buf{sizeof(RGBA8) * texelCount};
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uint32_t w = width;
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uint32_t h = height;
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auto* targetMip = reinterpret_cast<RGBA8*>(buf.data());
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const uint8_t* in = data.data();
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for (uint32_t mip = 0; mip < mips; ++mip) {
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const uint32_t bwidth = (w + 3) / 4;
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const uint32_t bheight = (h + 3) / 4;
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for (uint32_t by = 0; by < bheight; ++by) {
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const uint32_t baseY = by * 4;
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for (uint32_t bx = 0; bx < bwidth; ++bx) {
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const uint32_t baseX = bx * 4;
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for (uint32_t c = 0; c < 2; ++c) {
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for (uint32_t y = 0; y < 4; ++y) {
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RGBA8* target = targetMip + (baseY + y) * w + baseX;
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for (size_t x = 0; x < 4; ++x) {
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if (c != 0) {
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target[x].g = in[x * 2];
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target[x].b = in[x * 2 + 1];
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} else {
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target[x].a = in[x * 2];
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target[x].r = in[x * 2 + 1];
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}
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}
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in += 8;
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}
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}
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}
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}
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targetMip += w * h;
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if (w > 1) {
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w /= 2;
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}
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if (h > 1) {
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h /= 2;
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}
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}
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return buf;
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}
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ByteBuffer BuildDXT1FromGCN(uint32_t width, uint32_t height, uint32_t mips, ArrayRef<uint8_t> data) {
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const size_t blockCount = ComputeMippedBlockCountDXT1(width, height, mips);
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ByteBuffer buf{sizeof(DXT1Block) * blockCount};
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uint32_t w = width / 4;
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uint32_t h = height / 4;
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auto* targetMip = reinterpret_cast<DXT1Block*>(buf.data());
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const auto* in = reinterpret_cast<const DXT1Block*>(data.data());
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for (uint32_t mip = 0; mip < mips; ++mip) {
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const uint32_t bwidth = (w + 1) / 2;
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const uint32_t bheight = (h + 1) / 2;
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for (uint32_t by = 0; by < bheight; ++by) {
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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:
|
|
Log.report(LOG_FATAL, FMT_STRING("convert_texture: unknown format supplied {}"), format);
|
|
unreachable();
|
|
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:
|
|
Log.report(LOG_FATAL, FMT_STRING("convert_texture: C14X2 unimplemented"));
|
|
unreachable();
|
|
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 (wgpuDeviceHasFeature(webgpu::g_device, WGPUFeatureName_TextureCompressionBC)) {
|
|
return BuildDXT1FromGCN(width, height, mips, data);
|
|
} else {
|
|
return BuildRGBA8FromCMPR(width, height, mips, data);
|
|
}
|
|
}
|
|
}
|
|
} // namespace aurora::gfx
|