diff options
| -rw-r--r-- | src/raylib.h | 1 | ||||
| -rw-r--r-- | src/rtextures.c | 103 |
2 files changed, 104 insertions, 0 deletions
diff --git a/src/raylib.h b/src/raylib.h index a1150c4d..7554f75f 100644 --- a/src/raylib.h +++ b/src/raylib.h @@ -1247,6 +1247,7 @@ RLAPI Color *LoadImagePalette(Image image, int maxPaletteSize, int *colorCount); RLAPI void UnloadImageColors(Color *colors); // Unload color data loaded with LoadImageColors() RLAPI void UnloadImagePalette(Color *colors); // Unload colors palette loaded with LoadImagePalette() RLAPI Rectangle GetImageAlphaBorder(Image image, float threshold); // Get image alpha border rectangle +RLAPI Color GetImageColor(Image image, int x, int y); // Get image pixel color at (x, y) position // Image drawing functions // NOTE: Image software-rendering functions (CPU) diff --git a/src/rtextures.c b/src/rtextures.c index ed88c318..132f613b 100644 --- a/src/rtextures.c +++ b/src/rtextures.c @@ -2290,6 +2290,109 @@ Rectangle GetImageAlphaBorder(Image image, float threshold) return crop; } +// Get image pixel color at (x, y) position +Color GetImageColor(Image image, int x, int y) +{ + Color color = { 0 }; + + if ((x >=0) && (x < image.width) && (y >= 0) && (y < image.height)) + { + switch (image.format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: + { + color.r = ((unsigned char *)image.data)[y*image.width + x]; + color.g = ((unsigned char *)image.data)[y*image.width + x]; + color.b = ((unsigned char *)image.data)[y*image.width + x]; + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: + { + color.r = ((unsigned char *)image.data)[(y*image.width + x)*2]; + color.g = ((unsigned char *)image.data)[(y*image.width + x)*2]; + color.b = ((unsigned char *)image.data)[(y*image.width + x)*2]; + color.a = ((unsigned char *)image.data)[(y*image.width + x)*2 + 1]; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: + { + unsigned short pixel = ((unsigned short *)image.data)[y*image.width + x]; + + color.r = (unsigned char)((float)((pixel & 0b1111100000000000) >> 11)*(255/31)); + color.g = (unsigned char)((float)((pixel & 0b0000011111000000) >> 6)*(255/31)); + color.b = (unsigned char)((float)((pixel & 0b0000000000111110) >> 1)*(255/31)); + color.a = (unsigned char)((pixel & 0b0000000000000001)*255); + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G6B5: + { + unsigned short pixel = ((unsigned short *)image.data)[y*image.width + x]; + + color.r = (unsigned char)((float)((pixel & 0b1111100000000000) >> 11)*(255/31)); + color.g = (unsigned char)((float)((pixel & 0b0000011111100000) >> 5)*(255/63)); + color.b = (unsigned char)((float)(pixel & 0b0000000000011111)*(255/31)); + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: + { + unsigned short pixel = ((unsigned short *)image.data)[y*image.width + x]; + + color.r = (unsigned char)((float)((pixel & 0b1111000000000000) >> 12)*(255/15)); + color.g = (unsigned char)((float)((pixel & 0b0000111100000000) >> 8)*(255/15)); + color.b = (unsigned char)((float)((pixel & 0b0000000011110000) >> 4)*(255/15)); + color.a = (unsigned char)((float)(pixel & 0b0000000000001111)*(255/15)); + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: + { + color.r = ((unsigned char *)image.data)[(y*image.width + x)*4]; + color.g = ((unsigned char *)image.data)[(y*image.width + x)*4 + 1]; + color.b = ((unsigned char *)image.data)[(y*image.width + x)*4 + 2]; + color.a = ((unsigned char *)image.data)[(y*image.width + x)*4 + 3]; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8: + { + color.r = (unsigned char)((unsigned char *)image.data)[(y*image.width + x)*3]; + color.g = (unsigned char)((unsigned char *)image.data)[(y*image.width + x)*3 + 1]; + color.b = (unsigned char)((unsigned char *)image.data)[(y*image.width + x)*3 + 2]; + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32: + { + color.r = (unsigned char)(((float *)image.data)[y*image.width + x]*255.0f); + color.g = 0; + color.b = 0; + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32: + { + color.r = (unsigned char)(((float *)image.data)[(y*image.width + x)*3]*255.0f); + color.g = (unsigned char)(((float *)image.data)[(y*image.width + x)*3 + 1]*255.0f); + color.b = (unsigned char)(((float *)image.data)[(y*image.width + x)*3 + 2]*255.0f); + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: + { + color.r = (unsigned char)(((float *)image.data)[(y*image.width + x)*4]*255.0f); + color.g = (unsigned char)(((float *)image.data)[(y*image.width + x)*4]*255.0f); + color.b = (unsigned char)(((float *)image.data)[(y*image.width + x)*4]*255.0f); + color.a = (unsigned char)(((float *)image.data)[(y*image.width + x)*4]*255.0f); + + } break; + default: TRACELOG(LOG_WARNING, "Compressed image format does not support color reading"); break; + } + } + else TRACELOG(LOG_WARNING, "Requested image pixel (%i, %i) out of bounds", x, y); + + return color; +} + //------------------------------------------------------------------------------------ // Image drawing functions //------------------------------------------------------------------------------------ |