From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Wed, 1 Dec 2004 23:19:06 +0000 (+0000)
Subject: implemented scr_screenshot_gamma in screenshot saving (previously only implemented... 
X-Git-Tag: xonotic-v0.1.0preview~5320
X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fdarkplaces.git;a=commitdiff_plain;h=b44705fdf78d86303a002ef75471a966e27a483d;hp=5bdc0879026939f551a3ff217064732d59731be2

implemented scr_screenshot_gamma in screenshot saving (previously only implemented in video saving - oops)


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@4817 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/cl_screen.h b/cl_screen.h
index 2f1c8e9c..7f705b6f 100644
--- a/cl_screen.h
+++ b/cl_screen.h
@@ -68,6 +68,7 @@ extern cvar_t vid_conheight;
 extern cvar_t vid_pixelaspect;
 extern cvar_t scr_screenshot_jpeg;
 extern cvar_t scr_screenshot_jpeg_quality;
+extern cvar_t scr_screenshot_gamma;
 extern cvar_t scr_screenshot_name;
 
 void CL_Screen_NewMap(void);
diff --git a/gl_backend.c b/gl_backend.c
index 915abade..950dfc1e 100644
--- 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)