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REVIEWED: ImageAlphaCrop() #1218

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Now uses GetImageAlphaBorder()
This commit is contained in:
raysan5 2020-06-07 12:33:42 +02:00
parent 02ff68e1a3
commit 78c3d619f9
1 changed files with 5 additions and 26 deletions
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31
src/textures.c
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@ -1109,38 +1109,16 @@ Image ImageTextEx(Font font, const char *text, float fontSize, float spacing, Co
}
// Crop image depending on alpha value
// NOTE: Threshold is defined as a percentatge: 0.0f -> 1.0f
void ImageAlphaCrop(Image *image, float threshold)
{
// Security check to avoid program crash
if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return;
Color *pixels = GetImageData(*image);
Rectangle crop = GetImageAlphaBorder(*image, threshold);
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 = { (float)xMin, (float)yMin, (float)((xMax + 1) - xMin), (float)((yMax + 1) - yMin) };
RL_FREE(pixels);
// Check for not empty image brefore cropping
if (!((xMax < xMin) || (yMax < yMin))) ImageCrop(image, crop);
// Crop if rectangle is valid
if (((int)crop.width != 0) && ((int)crop.height != 0)) ImageCrop(image, crop);
}
// Clear alpha channel to desired color
@ -2198,6 +2176,7 @@ Vector4 *GetImageDataNormalized(Image image)
}
// Get image alpha border rectangle
// NOTE: Threshold is defined as a percentatge: 0.0f -> 1.0f
Rectangle GetImageAlphaBorder(Image image, float threshold)
{
Rectangle crop = { 0 };