diff --git a/src/raylib.h b/src/raylib.h index 798d6d89..dd3ef86c 100644 --- a/src/raylib.h +++ b/src/raylib.h @@ -1095,6 +1095,7 @@ RLAPI void UnloadTexture(Texture2D texture); 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 Vector4 *GetImageDataNormalized(Image image); // Get pixel data from image as Vector4 array (float normalized) +RLAPI Rectangle GetImageAlphaBorder(Image image); // Get image alpha border rectangle RLAPI int GetPixelDataSize(int width, int height, int format); // Get pixel data size in bytes (image or texture) RLAPI Image GetTextureData(Texture2D texture); // Get pixel data from GPU texture and return an Image RLAPI Image GetScreenData(void); // Get pixel data from screen buffer and return an Image (screenshot) diff --git a/src/textures.c b/src/textures.c index 18021352..a25a23ab 100644 --- a/src/textures.c +++ b/src/textures.c @@ -680,6 +680,37 @@ Vector4 *GetImageDataNormalized(Image image) return pixels; } +// Get image alpha border rectangle +Rectangle GetImageAlphaBorder(Image image) +{ + Color *pixels = GetImageData(image); + + int xMin = 65536; // Define a big enough number + int xMax = 0; + int yMin = 65536; + int yMax = 0; + + for (int y = 0; y < image->height; y++) + { + for (int x = 0; x < image->width; x++) + { + if (pixels[y*image->width + x].a > (unsigned char)(threshold*255.0f)) + { + if (x < xMin) xMin = x; + if (x > xMax) xMax = x; + if (y < yMin) yMin = y; + if (y > yMax) yMax = y; + } + } + } + + Rectangle crop = { xMin, yMin, (xMax + 1) - xMin, (yMax + 1) - yMin }; + + RL_FREE(pixels); + + return crop; +} + // Get pixel data size in bytes (image or texture) // NOTE: Size depends on pixel format int GetPixelDataSize(int width, int height, int format) @@ -894,7 +925,9 @@ Image ImageFromImage(Image image, Rectangle rec) { Image result = ImageCopy(image); +#if defined(SUPPORT_IMAGE_MANIPULATION) ImageCrop(&result, rec); +#endif return result; }