a harmless sRGB simplification, more to be done later

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@11458 d7cf8633-e32d-0410-b094-e92efae38249
::stable-branch::merge=154145cdd4e53712d7c69f1def94df479d4b7e34

diff --git a/gl_rmain.c b/gl_rmain.c
index b61ea3f1894e7cc044a93462299933104efaaa1b..20aff5a24551d832f97d6047d46740904cbeb10e 100644 (file)
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -192,6 +192,7 @@ cvar_t r_waterscroll = {CVAR_SAVE, "r_waterscroll", "1", "makes water scroll aro
 
 cvar_t r_bloom = {CVAR_SAVE, "r_bloom", "0", "enables bloom effect (makes bright pixels affect neighboring pixels)"};
 cvar_t r_bloom_colorscale = {CVAR_SAVE, "r_bloom_colorscale", "1", "how bright the glow is"};
+
 cvar_t r_bloom_brighten = {CVAR_SAVE, "r_bloom_brighten", "2", "how bright the glow is, after subtract/power"};
 cvar_t r_bloom_blur = {CVAR_SAVE, "r_bloom_blur", "4", "how large the glow is"};
 cvar_t r_bloom_resolution = {CVAR_SAVE, "r_bloom_resolution", "320", "what resolution to perform the bloom effect at (independent of screen resolution)"};

diff --git a/image.h b/image.h
index 66b679df506abd06e3ca703eefce19ed60edf269..442b5dc77d516fa3940a16d306cf947af8d3df56 100644 (file)
--- a/image.h
+++ b/image.h
@@ -49,8 +49,12 @@ void Image_HeightmapToNormalmap_BGRA(const unsigned char *inpixels, unsigned cha
 void Image_FixTransparentPixels_f(void);
 extern cvar_t r_fixtrans_auto;
 
-#define Image_LinearFloatFromsRGB(c) (((c) <= 10.3552f) ? (c) * 0.000302341331f : (float)pow(((c)*(1.0f/256.0f) + 0.055f)*(1.0f/1.055f), 2.4f))
-#define Image_sRGBFloatFromLinear(c) (((c) < 0.8014848f) ? (c) * 0.05046875f : 1.055f * (float)pow((c)*(1.0f/256.0f), 1.0f/2.4f) - 0.055f)
+#define Image_LinearFloatFromsRGBFloat(c) (((c) <= 0.04045f) ? (c) * (1.0f / 12.92f) : (float)pow(((c) + 0.055f)*(1.0f/1.055f), 2.4f))
+#define Image_sRGBFloatFromLinearFloat(c) (((c) < 0.0031308f) ? (c) * 12.92f : 1.055f * (float)pow((c), 1.0f/2.4f) - 0.055f)
+
+#define Image_LinearFloatFromsRGB(c) Image_LinearFloatFromsRGBFloat((c) * (1.0f / 255.0f))
+#define Image_sRGBFloatFromLinear(c) Image_sRGBFloatFromLinearFloat((c) * (1.0f / 255.0f))
+
 #define Image_sRGBFloatFromLinear_Lightmap(c) (Image_sRGBFloatFromLinear(c*2.0f)*0.5f)
 
 void Image_MakeLinearColorsFromsRGB(unsigned char *pout, const unsigned char *pin, int numpixels);