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ADDED: GetImageAlphaBorder()

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Ray 2019-08-07 00:28:05 +02:00
parent 042499188c
commit 2a913b6587
2 changed files with 34 additions and 0 deletions
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1
src/raylib.h
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@ -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)

33
src/textures.c
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@ -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;
}