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REVIEWED: rlGetPixelDataSize(), correct compressed data size calculation per blocks #5416

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Ray
2025-12-19 00:06:44 +01:00
parent 720dd22491
commit 66392fe0ae
1 changed files with 23 additions and 11 deletions
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32
src/rlgl.h
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@ -5224,24 +5224,36 @@ static int rlGetPixelDataSize(int width, int height, int format)
case RL_PIXELFORMAT_COMPRESSED_ETC1_RGB:
case RL_PIXELFORMAT_COMPRESSED_ETC2_RGB:
case RL_PIXELFORMAT_COMPRESSED_PVRT_RGB:
case RL_PIXELFORMAT_COMPRESSED_PVRT_RGBA: bpp = 4; break;
case RL_PIXELFORMAT_COMPRESSED_PVRT_RGBA: // 8 bytes per each 4x4 block
{
int blockWidth = (width + 3)/4;
int blockHeight = (height + 3)/4;
dataSize = blockWidth*blockHeight*8;
} break;
case RL_PIXELFORMAT_COMPRESSED_DXT3_RGBA:
case RL_PIXELFORMAT_COMPRESSED_DXT5_RGBA:
case RL_PIXELFORMAT_COMPRESSED_ETC2_EAC_RGBA:
case RL_PIXELFORMAT_COMPRESSED_ASTC_4x4_RGBA: bpp = 8; break;
case RL_PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA: bpp = 2; break;
case RL_PIXELFORMAT_COMPRESSED_ASTC_4x4_RGBA: // 16 bytes per each 4x4 block
{
int blockWidth = (width + 3)/4;
int blockHeight = (height + 3)/4;
dataSize = blockWidth*blockHeight*16;
} break;
case RL_PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA: // 4 bytes per each 4x4 block
{
int blockWidth = (width + 3)/4;
int blockHeight = (height + 3)/4;
dataSize = blockWidth*blockHeight*4;
} break;
default: break;
}
// Compute dataSize for uncompressed texture data (no blocks)
if ((format >= RL_PIXELFORMAT_UNCOMPRESSED_GRAYSCALE) &&
(format <= RL_PIXELFORMAT_UNCOMPRESSED_R16G16B16A16))
{
double bytesPerPixel = (double)bpp/8.0;
dataSize = (int)(bytesPerPixel*width*height); // Total data size in bytes
// Most compressed formats works on 4x4 blocks,
// if texture is smaller, minimum dataSize is 8 or 16
if ((width <= 4) && (height <= 4))
{
if ((format >= RL_PIXELFORMAT_COMPRESSED_DXT1_RGB) && (format < RL_PIXELFORMAT_COMPRESSED_DXT3_RGBA)) dataSize = 8;
else if ((format >= RL_PIXELFORMAT_COMPRESSED_DXT3_RGBA) && (format < RL_PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA)) dataSize = 16;
}
return dataSize;