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Added function: GetPixelDataSize()

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Just found I need that function...
This commit is contained in:
raysan5 2018-01-06 02:50:20 +01:00
parent 0e48396369
commit 7fa2861160
2 changed files with 38 additions and 0 deletions
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1
src/raylib.h
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@ -869,6 +869,7 @@ RLAPI void UnloadImage(Image image);
RLAPI void UnloadTexture(Texture2D texture); // Unload texture from GPU memory (VRAM)
RLAPI void UnloadRenderTexture(RenderTexture2D target); // Unload render texture from GPU memory (VRAM)
RLAPI Color *GetImageData(Image image); // Get pixel data from image as a Color struct array
RLAPI int GetImageDataSize(Image image); // Get image data size in bytes
RLAPI Image GetTextureData(Texture2D texture); // Get pixel data from GPU texture and return an Image
RLAPI void UpdateTexture(Texture2D texture, const void *pixels); // Update GPU texture with new data
RLAPI void SaveImageAs(const char *fileName, Image image); // Save image to a PNG file

37
src/textures.c
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@ -515,6 +515,43 @@ Color *GetImageData(Image image)
return pixels;
}
// Get pixel data size in bytes (image or texture)
// NOTE: Size depends on pixel format
int GetPixelDataSize(int width, int height, int format)
{
int dataSize = 0; // Size in bytes
int bpp = 0; // Bits per pixel
switch (format)
{
case UNCOMPRESSED_GRAYSCALE: bpp = 8; break;
case UNCOMPRESSED_GRAY_ALPHA:
case UNCOMPRESSED_R5G6B5:
case UNCOMPRESSED_R5G5B5A1:
case UNCOMPRESSED_R4G4B4A4: bpp = 16; break;
case UNCOMPRESSED_R8G8B8A8: bpp = 32; break;
case UNCOMPRESSED_R8G8B8: bpp = 24; break;
case UNCOMPRESSED_R32G32B32: bpp = 32*3; break;
case UNCOMPRESSED_R32G32B32A32: bpp = 32*4; break;
case COMPRESSED_DXT1_RGB:
case COMPRESSED_DXT1_RGBA:
case COMPRESSED_ETC1_RGB:
case COMPRESSED_ETC2_RGB:
case COMPRESSED_PVRT_RGB:
case COMPRESSED_PVRT_RGBA: bpp = 4; break;
case COMPRESSED_DXT3_RGBA:
case COMPRESSED_DXT5_RGBA:
case COMPRESSED_ETC2_EAC_RGBA:
case COMPRESSED_ASTC_4x4_RGBA: bpp = 8; break;
case COMPRESSED_ASTC_8x8_RGBA: bpp = 2; break;
default: break;
}
dataSize = width*height*bpp/8; // Total data size in bytes
return dataSize;
}
// Get pixel data from GPU texture and return an Image
// NOTE: Compressed texture formats not supported
Image GetTextureData(Texture2D texture)