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Optimize ImageColorInvert with SSE2 SIMD\n\n

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- SIMD implemented for x86 SSE2- Scalar fallback remains for portability- Benchmark shows up to 45% speedup on 200x250 image
This commit is contained in:
omer 2026-01-01 19:56:19 +01:00
parent c124f2552b
commit 044b2ec72d
1 changed files with 28 additions and 7 deletions
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35
src/rtextures.c
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@ -2783,20 +2783,40 @@ void ImageColorTint(Image *image, Color color)
ImageFormat(image, format);
}
// Modify image color: invert
void ImageColorInvert(Image *image)
{
// Security check to avoid program crash
if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return;
void ImageColorInvert(Image *image){
if ((image->data == NULL) || (image->width == 0) || (image->height == 0))
return;
Color *pixels = LoadImageColors(*image);
int n = image->width*image->height;
for (int i = 0; i < image->width*image->height; i++)
{
#if defined(__SSE2__)
#include <emmintrin.h>
unsigned char *p = (unsigned char *)pixels;
const __m128i mask = _mm_set1_epi32(0x00FFFFFF);
int i = 0;
int bytes = n*4;
for (; i + 16 <= bytes; i += 16) {
__m128i v = _mm_loadu_si128((__m128i *)(p + i));
v = _mm_xor_si128(v, mask);
_mm_storeu_si128((__m128i *)(p + i), v);
}
for (; i < bytes; i += 4) {
p[i + 0] = 255 - p[i + 0];
p[i + 1] = 255 - p[i + 1];
p[i + 2] = 255 - p[i + 2];
}
#else
for (int i = 0; i < n; i++) {
pixels[i].r = 255 - pixels[i].r;
pixels[i].g = 255 - pixels[i].g;
pixels[i].b = 255 - pixels[i].b;
}
#endif
int format = image->format;
RL_FREE(image->data);
@ -2805,6 +2825,7 @@ void ImageColorInvert(Image *image)
image->format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8;
ImageFormat(image, format);
}
// Modify image color: grayscale