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Optimize texture encoding (#12)

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Anders Jenbo 2025-06-29 19:39:07 +02:00 committed by GitHub
parent 033df2d66f
commit 93a4448e89
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GPG Key ID: B5690EEEBB952194
1 changed files with 11 additions and 14 deletions
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25
miniwin/src/d3drm/backends/citro3d/renderer.cpp
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@ -144,16 +144,6 @@ static SDL_Surface* ConvertAndResizeSurface(SDL_Surface* original, bool isUI, fl
return padded;
}
inline int mortonInterleave(int x, int y)
{
int answer = 0;
for (int i = 0; i < 3; ++i) {
answer |= ((y >> i) & 1) << (2 * i + 1);
answer |= ((x >> i) & 1) << (2 * i);
}
return answer;
}
static void EncodeTextureLayout(const u8* src, u8* dst, int width, int height)
{
const int tileSize = 8;
@ -161,6 +151,11 @@ static void EncodeTextureLayout(const u8* src, u8* dst, int width, int height)
int tilesPerRow = (width + tileSize - 1) / tileSize;
static const uint8_t mortonLUT[64] = {0, 1, 4, 5, 16, 17, 20, 21, 2, 3, 6, 7, 18, 19, 22, 23,
8, 9, 12, 13, 24, 25, 28, 29, 10, 11, 14, 15, 26, 27, 30, 31,
32, 33, 36, 37, 48, 49, 52, 53, 34, 35, 38, 39, 50, 51, 54, 55,
40, 41, 44, 45, 56, 57, 60, 61, 42, 43, 46, 47, 58, 59, 62, 63};
for (int tileY = 0; tileY < height; tileY += tileSize) {
for (int tileX = 0; tileX < width; tileX += tileSize) {
int tileIndex = (tileY / tileSize) * tilesPerRow + (tileX / tileSize);
@ -175,11 +170,11 @@ static void EncodeTextureLayout(const u8* src, u8* dst, int width, int height)
continue;
}
int mortonIndex = mortonInterleave(x, y);
int dstIndex = (tileIndex + mortonIndex) * bytesPerPixel;
int srcIndex = ((height - 1 - srcY) * width + srcX) * bytesPerPixel;
int morton = mortonLUT[y * tileSize + x];
int dstIndex = (tileIndex + morton) * bytesPerPixel;
int srcIndex = ((height - 1 - srcY) * width + srcX);
std::memcpy(&dst[dstIndex], &src[srcIndex], bytesPerPixel);
*(u32*) &dst[dstIndex] = ((u32*) src)[srcIndex];
}
}
}
@ -383,6 +378,7 @@ void Citro3DRenderer::StartFrame()
}
C3D_FrameBegin(C3D_FRAME_SYNCDRAW);
C3D_FrameDrawOn(m_renderTarget);
g_rendering = true;
}
void ConvertPerspective(const D3DRMMATRIX4D in, C3D_Mtx* out)
@ -529,6 +525,7 @@ void Citro3DRenderer::Flip()
C3D_FrameEnd(0);
gfxFlushBuffers();
gspWaitForVBlank();
g_rendering = false;
}
void Citro3DRenderer::Draw2DImage(Uint32 textureId, const SDL_Rect& srcRect, const SDL_Rect& dstRect)