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fixed blur issue on opaque pictures & added example (#2775)

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Co-authored-by: nobytesgiven <nobytesgiven@users.noreply.github.com>
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nobytesgiven 2022-10-26 10:11:14 +03:00 committed by GitHub
parent 865f823835
commit c4abf68351
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2 changed files with 6 additions and 4 deletions
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5
examples/textures/textures_image_processing.c
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@ -17,7 +17,7 @@
#include <stdlib.h> // Required for: free()
#define NUM_PROCESSES 8
#define NUM_PROCESSES 9
typedef enum {
NONE = 0,
@ -26,6 +26,7 @@ typedef enum {
COLOR_INVERT,
COLOR_CONTRAST,
COLOR_BRIGHTNESS,
GAUSSIAN_BLUR,
FLIP_VERTICAL,
FLIP_HORIZONTAL
} ImageProcess;
@ -37,6 +38,7 @@ static const char *processText[] = {
"COLOR INVERT",
"COLOR CONTRAST",
"COLOR BRIGHTNESS",
"GAUSSIAN BLUR",
"FLIP VERTICAL",
"FLIP HORIZONTAL"
};
@ -125,6 +127,7 @@ int main(void)
case COLOR_INVERT: ImageColorInvert(&imCopy); break;
case COLOR_CONTRAST: ImageColorContrast(&imCopy, -40); break;
case COLOR_BRIGHTNESS: ImageColorBrightness(&imCopy, -80); break;
case GAUSSIAN_BLUR: ImageBlurGaussian(&imCopy, 10); break;
case FLIP_VERTICAL: ImageFlipVertical(&imCopy); break;
case FLIP_HORIZONTAL: ImageFlipHorizontal(&imCopy); break;
default: break;

5
src/rtextures.c
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@ -1506,7 +1506,6 @@ void ImageBlurGaussian(Image *image, int blurSize) {
ImageAlphaPremultiply(image);
Color *pixels = LoadImageColors(*image);
Color *pixelsCopy = LoadImageColors(*image);
// Loop switches between pixelsCopy1 and pixelsCopy2
Vector4 *pixelsCopy1 = RL_MALLOC((image->height)*(image->width)*sizeof(Vector4));
@ -1623,14 +1622,14 @@ void ImageBlurGaussian(Image *image, int blurSize) {
// Reverse premultiply
for (int i = 0; i < (image->width)*(image->height); i++)
{
if (pixelsCopy1[i].w == 0)
if (pixelsCopy1[i].w == 0.0f)
{
pixels[i].r = 0;
pixels[i].g = 0;
pixels[i].b = 0;
pixels[i].a = 0;
}
else if (pixelsCopy1[i].w < 255.0f)
else if (pixelsCopy1[i].w <= 255.0f)
{
float alpha = (float)pixelsCopy1[i].w/255.0f;
pixels[i].r = (unsigned char)((float)pixelsCopy1[i].x/alpha);