implemented scr_screenshot_gamma in screenshot saving (previously only implemented...

[xonotic/darkplaces.git] / gl_backend.c

diff --git a/gl_backend.c b/gl_backend.c
index 915abadef8822257f5db2748903196b4a34d76ad..950dfc1e159052ebc149e45be6ad670b0dd52246 100644 (file)
--- a/gl_backend.c
+++ b/gl_backend.c
@@ -1209,6 +1209,17 @@ qboolean SCR_ScreenShot(char *filename, qbyte *buffer1, qbyte *buffer2, qbyte *b
        qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer1);
        CHECKGLERROR
 
+       if (scr_screenshot_gamma.value != 1)
+       {
+               int i;
+               double igamma = 1.0 / scr_screenshot_gamma.value;
+               unsigned char ramp[256];
+               for (i = 0;i < 256;i++)
+                       ramp[i] = (unsigned char) (pow(i * (1.0 / 255.0), igamma) * 255.0);
+               for (i = 0;i < width*height*3;i++)
+                       buffer1[i] = ramp[buffer1[i]];
+       }
+
        Image_CopyMux (buffer2, buffer1, width, height, flipx, flipy, flipdiagonal, 3, 3, indices);
 
        if (jpeg)