]> git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - gl_draw.c
Merge remote branch 'origin/master' into akari/irc
[xonotic/darkplaces.git] / gl_draw.c
index 9850142f6bdbbac40454ea474f544a7a2dcefd45..aa6a0c387bb90bcb13ddb3e51674259480fe4ca8 100644 (file)
--- a/gl_draw.c
+++ b/gl_draw.c
@@ -53,7 +53,7 @@ static cachepic_t *cachepichash[CACHEPICHASHSIZE];
 static cachepic_t cachepics[MAX_CACHED_PICS];
 static int numcachepics;
 
-static rtexturepool_t *drawtexturepool;
+rtexturepool_t *drawtexturepool;
 
 static const unsigned char concharimage[FONT_FILESIZE] =
 {
@@ -302,6 +302,7 @@ static rtexture_t *draw_generatepic(const char *name, qboolean quiet)
        return r_texture_notexture;
 }
 
+int draw_frame = 1;
 
 /*
 ================
@@ -312,26 +313,34 @@ Draw_CachePic
 cachepic_t *Draw_CachePic_Flags(const char *path, unsigned int cachepicflags)
 {
        int crc, hashkey;
-       unsigned char *pixels;
+       unsigned char *pixels = NULL;
        cachepic_t *pic;
        fs_offset_t lmpsize;
        unsigned char *lmpdata;
        char lmpname[MAX_QPATH];
        int texflags;
        int j;
+       qboolean ddshasalpha;
+       float ddsavgcolor[4];
+       qboolean loaded = false;
 
        texflags = TEXF_ALPHA;
        if (!(cachepicflags & CACHEPICFLAG_NOCLAMP))
                texflags |= TEXF_CLAMP;
-       if (!(cachepicflags & CACHEPICFLAG_NOCOMPRESSION) && gl_texturecompression_2d.integer)
+       if (!(cachepicflags & CACHEPICFLAG_NOCOMPRESSION) && gl_texturecompression_2d.integer && gl_texturecompression.integer)
                texflags |= TEXF_COMPRESS;
 
        // check whether the picture has already been cached
        crc = CRC_Block((unsigned char *)path, strlen(path));
        hashkey = ((crc >> 8) ^ crc) % CACHEPICHASHSIZE;
        for (pic = cachepichash[hashkey];pic;pic = pic->chain)
+       {
                if (!strcmp (path, pic->name))
-                       if(!((pic->texflags ^ texflags) & ~(TEXF_COMPRESS))) // ignore TEXF_COMPRESS when comparing, because fallback pics remove the flag
+               {
+                       // if it was created (or replaced) by Draw_NewPic, just return it
+                       if(pic->flags & CACHEPICFLAG_NEWPIC)
+                               return pic;
+                       if (!((pic->texflags ^ texflags) & ~(TEXF_COMPRESS))) // ignore TEXF_COMPRESS when comparing, because fallback pics remove the flag
                        {
                                if(!(cachepicflags & CACHEPICFLAG_NOTPERSISTENT))
                                {
@@ -342,6 +351,8 @@ cachepic_t *Draw_CachePic_Flags(const char *path, unsigned int cachepicflags)
                                }
                                return pic;
                        }
+               }
+       }
 
        if (numcachepics == MAX_CACHED_PICS)
        {
@@ -357,6 +368,7 @@ cachepic_t *Draw_CachePic_Flags(const char *path, unsigned int cachepicflags)
 
 reload:
        // check whether it is an dynamic texture (if so, we can directly use its texture handler)
+       pic->flags = cachepicflags;
        pic->tex = CL_GetDynTexture( path );
        // if so, set the width/height, too
        if( pic->tex ) {
@@ -369,13 +381,20 @@ reload:
        pic->hasalpha = true; // assume alpha unless we know it has none
        pic->texflags = texflags;
        pic->autoload = (cachepicflags & CACHEPICFLAG_NOTPERSISTENT);
+       pic->lastusedframe = draw_frame;
 
        // load a high quality image from disk if possible
-       pixels = loadimagepixelsbgra(path, false, true, false, NULL);
-       if (pixels == NULL && !strncmp(path, "gfx/", 4))
-               pixels = loadimagepixelsbgra(path+4, false, true, false, NULL);
-       if (pixels)
+       if (!loaded && r_texture_dds_load.integer != 0 && (pic->tex = R_LoadTextureDDSFile(drawtexturepool, va("dds/%s.dds", pic->name), pic->texflags, &ddshasalpha, ddsavgcolor, 0)))
        {
+               // note this loads even if autoload is true, otherwise we can't get the width/height
+               loaded = true;
+               pic->hasalpha = ddshasalpha;
+               pic->width = R_TextureWidth(pic->tex);
+               pic->height = R_TextureHeight(pic->tex);
+       }
+       if (!loaded && ((pixels = loadimagepixelsbgra(pic->name, false, true, false, NULL)) || (!strncmp(pic->name, "gfx/", 4) && (pixels = loadimagepixelsbgra(pic->name+4, false, true, false, NULL)))))
+       {
+               loaded = true;
                pic->hasalpha = false;
                if (pic->texflags & TEXF_ALPHA)
                {
@@ -392,9 +411,15 @@ reload:
                pic->width = image_width;
                pic->height = image_height;
                if (!pic->autoload)
-                       pic->tex = R_LoadTexture2D(drawtexturepool, path, image_width, image_height, pixels, r_texture_sRGB_2d.integer ? TEXTYPE_SRGB_BGRA : TEXTYPE_BGRA, pic->texflags & (pic->hasalpha ? ~0 : ~TEXF_ALPHA), -1, NULL);
+               {
+                       pic->tex = R_LoadTexture2D(drawtexturepool, pic->name, image_width, image_height, pixels, vid.sRGB2D ? TEXTYPE_SRGB_BGRA : TEXTYPE_BGRA, pic->texflags & (pic->hasalpha ? ~0 : ~TEXF_ALPHA), -1, NULL);
+#ifndef USE_GLES2
+                       if (r_texture_dds_save.integer && qglGetCompressedTexImageARB && pic->tex)
+                               R_SaveTextureDDSFile(pic->tex, va("dds/%s.dds", pic->name), r_texture_dds_save.integer < 2, pic->hasalpha);
+#endif
+               }
        }
-       else
+       if (!loaded)
        {
                pic->autoload = false;
                // never compress the fallback images
@@ -405,43 +430,52 @@ reload:
        // size from that even if we don't upload the texture, this way the pics
        // show up the right size in the menu even if they were replaced with
        // higher or lower resolution versions
-       dpsnprintf(lmpname, sizeof(lmpname), "%s.lmp", path);
-       if (!strncmp(path, "gfx/", 4) && (lmpdata = FS_LoadFile(lmpname, tempmempool, false, &lmpsize)))
+       dpsnprintf(lmpname, sizeof(lmpname), "%s.lmp", pic->name);
+       if (!strncmp(pic->name, "gfx/", 4) && (lmpdata = FS_LoadFile(lmpname, tempmempool, false, &lmpsize)))
        {
                if (developer_loading.integer)
-                       Con_Printf("loading lump \"%s\"\n", path);
+                       Con_Printf("loading lump \"%s\"\n", pic->name);
 
                if (lmpsize >= 9)
                {
                        pic->width = lmpdata[0] + lmpdata[1] * 256 + lmpdata[2] * 65536 + lmpdata[3] * 16777216;
                        pic->height = lmpdata[4] + lmpdata[5] * 256 + lmpdata[6] * 65536 + lmpdata[7] * 16777216;
                        // if no high quality replacement image was found, upload the original low quality texture
-                       if (!pixels)
-                               pic->tex = R_LoadTexture2D(drawtexturepool, path, pic->width, pic->height, lmpdata + 8, TEXTYPE_PALETTE, pic->texflags, -1, palette_bgra_transparent);
+                       if (!loaded)
+                       {
+                               loaded = true;
+                               pic->tex = R_LoadTexture2D(drawtexturepool, pic->name, pic->width, pic->height, lmpdata + 8, vid.sRGB2D ? TEXTYPE_SRGB_PALETTE : TEXTYPE_PALETTE, pic->texflags, -1, palette_bgra_transparent);
+                       }
                }
                Mem_Free(lmpdata);
        }
-       else if ((lmpdata = W_GetLumpName (path + 4)))
+       else if ((lmpdata = W_GetLumpName (pic->name + 4)))
        {
                if (developer_loading.integer)
-                       Con_Printf("loading gfx.wad lump \"%s\"\n", path + 4);
+                       Con_Printf("loading gfx.wad lump \"%s\"\n", pic->name + 4);
 
-               if (!strcmp(path, "gfx/conchars"))
+               if (!strcmp(pic->name, "gfx/conchars"))
                {
                        // conchars is a raw image and with color 0 as transparent instead of 255
                        pic->width = 128;
                        pic->height = 128;
                        // if no high quality replacement image was found, upload the original low quality texture
-                       if (!pixels)
-                               pic->tex = R_LoadTexture2D(drawtexturepool, path, 128, 128, lmpdata, TEXTYPE_PALETTE, pic->texflags, -1, palette_bgra_font);
+                       if (!loaded)
+                       {
+                               loaded = true;
+                               pic->tex = R_LoadTexture2D(drawtexturepool, pic->name, 128, 128, lmpdata, vid.sRGB2D != 0 ? TEXTYPE_SRGB_PALETTE : TEXTYPE_PALETTE, pic->texflags, -1, palette_bgra_font);
+                       }
                }
                else
                {
                        pic->width = lmpdata[0] + lmpdata[1] * 256 + lmpdata[2] * 65536 + lmpdata[3] * 16777216;
                        pic->height = lmpdata[4] + lmpdata[5] * 256 + lmpdata[6] * 65536 + lmpdata[7] * 16777216;
                        // if no high quality replacement image was found, upload the original low quality texture
-                       if (!pixels)
-                               pic->tex = R_LoadTexture2D(drawtexturepool, path, pic->width, pic->height, lmpdata + 8, TEXTYPE_PALETTE, pic->texflags, -1, palette_bgra_transparent);
+                       if (!loaded)
+                       {
+                               loaded = true;
+                               pic->tex = R_LoadTexture2D(drawtexturepool, pic->name, pic->width, pic->height, lmpdata + 8, vid.sRGB2D != 0 ? TEXTYPE_SRGB_PALETTE : TEXTYPE_PALETTE, pic->texflags, -1, palette_bgra_transparent);
+                       }
                }
        }
 
@@ -450,10 +484,10 @@ reload:
                Mem_Free(pixels);
                pixels = NULL;
        }
-       else if (pic->tex == NULL)
+       if (!loaded)
        {
                // if it's not found on disk, generate an image
-               pic->tex = draw_generatepic(path, (cachepicflags & CACHEPICFLAG_QUIET) != 0);
+               pic->tex = draw_generatepic(pic->name, (cachepicflags & CACHEPICFLAG_QUIET) != 0);
                pic->width = R_TextureWidth(pic->tex);
                pic->height = R_TextureHeight(pic->tex);
        }
@@ -466,15 +500,32 @@ cachepic_t *Draw_CachePic (const char *path)
        return Draw_CachePic_Flags (path, 0); // default to persistent!
 }
 
-int draw_frame = 1;
-
 rtexture_t *Draw_GetPicTexture(cachepic_t *pic)
 {
        if (pic->autoload && !pic->tex)
        {
-               pic->tex = loadtextureimage(drawtexturepool, pic->name, false, pic->texflags, true, r_texture_sRGB_2d.integer != 0);
+               if (pic->tex == NULL && r_texture_dds_load.integer != 0)
+               {
+                       qboolean ddshasalpha;
+                       float ddsavgcolor[4];
+                       pic->tex = R_LoadTextureDDSFile(drawtexturepool, va("dds/%s.dds", pic->name), pic->texflags, &ddshasalpha, ddsavgcolor, 0);
+               }
+               if (pic->tex == NULL)
+               {
+                       pic->tex = loadtextureimage(drawtexturepool, pic->name, false, pic->texflags, true, vid.sRGB2D);
+#ifndef USE_GLES2
+                       if (r_texture_dds_save.integer && qglGetCompressedTexImageARB && pic->tex)
+                               R_SaveTextureDDSFile(pic->tex, va("dds/%s.dds", pic->name), r_texture_dds_save.integer < 2, pic->hasalpha);
+#endif
+               }
                if (pic->tex == NULL && !strncmp(pic->name, "gfx/", 4))
-                       pic->tex = loadtextureimage(drawtexturepool, pic->name+4, false, pic->texflags, true, r_texture_sRGB_2d.integer != 0);
+               {
+                       pic->tex = loadtextureimage(drawtexturepool, pic->name+4, false, pic->texflags, true, vid.sRGB2D);
+#ifndef USE_GLES2
+                       if (r_texture_dds_save.integer && qglGetCompressedTexImageARB && pic->tex)
+                               R_SaveTextureDDSFile(pic->tex, va("dds/%s.dds", pic->name), r_texture_dds_save.integer < 2, pic->hasalpha);
+#endif
+               }
                if (pic->tex == NULL)
                        pic->tex = draw_generatepic(pic->name, true);
        }
@@ -514,7 +565,7 @@ cachepic_t *Draw_NewPic(const char *picname, int width, int height, int alpha, u
 
        if (pic)
        {
-               if (pic->tex && pic->width == width && pic->height == height)
+               if (pic->flags == CACHEPICFLAG_NEWPIC && pic->tex && pic->width == width && pic->height == height)
                {
                        R_UpdateTexture(pic->tex, pixels_bgra, 0, 0, 0, width, height, 1);
                        return pic;
@@ -538,6 +589,7 @@ cachepic_t *Draw_NewPic(const char *picname, int width, int height, int alpha, u
                }
        }
 
+       pic->flags = CACHEPICFLAG_NEWPIC; // disable texflags checks in Draw_CachePic
        pic->width = width;
        pic->height = height;
        if (pic->tex)
@@ -1095,7 +1147,7 @@ void DrawQ_Pic(float x, float y, cachepic_t *pic, float width, float height, flo
                        width = pic->width;
                if (height == 0)
                        height = pic->height;
-               R_SetupShader_Generic(Draw_GetPicTexture(pic), NULL, GL_MODULATE, 1);
+               R_SetupShader_Generic(Draw_GetPicTexture(pic), NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
 
 #if 0
       // AK07: lets be texel correct on the corners
@@ -1111,7 +1163,7 @@ void DrawQ_Pic(float x, float y, cachepic_t *pic, float width, float height, flo
 #endif
        }
        else
-               R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1);
+               R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
 
        floats[2] = floats[5] = floats[8] = floats[11] = 0;
        floats[0] = floats[9] = x;
@@ -1144,10 +1196,10 @@ void DrawQ_RotPic(float x, float y, cachepic_t *pic, float width, float height,
                        width = pic->width;
                if (height == 0)
                        height = pic->height;
-               R_SetupShader_Generic(Draw_GetPicTexture(pic), NULL, GL_MODULATE, 1);
+               R_SetupShader_Generic(Draw_GetPicTexture(pic), NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
        }
        else
-               R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1);
+               R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
 
        floats[2] = floats[5] = floats[8] = floats[11] = 0;
 
@@ -1189,7 +1241,7 @@ void DrawQ_Fill(float x, float y, float width, float height, float red, float gr
                return;
 
 //     R_Mesh_ResetTextureState();
-       R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1);
+       R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
 
        floats[2] = floats[5] = floats[8] = floats[11] = 0;
        floats[0] = floats[9] = x;
@@ -1516,7 +1568,7 @@ float DrawQ_String_Scale(float startx, float starty, const char *text, size_t ma
 //     R_Mesh_ResetTextureState();
        if (!fontmap)
                R_Mesh_TexBind(0, fnt->tex);
-       R_SetupShader_Generic(fnt->tex, NULL, GL_MODULATE, 1);
+       R_SetupShader_Generic(fnt->tex, NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
 
        ac = color4f;
        at = texcoord2f;
@@ -1652,7 +1704,7 @@ float DrawQ_String_Scale(float startx, float starty, const char *text, size_t ma
                                                        at = texcoord2f;
                                                        av = vertex3f;
                                                }
-                                               R_SetupShader_Generic(fnt->tex, NULL, GL_MODULATE, 1);
+                                               R_SetupShader_Generic(fnt->tex, NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
                                                map = ft2_oldstyle_map;
                                        }
                                }
@@ -1721,7 +1773,7 @@ float DrawQ_String_Scale(float startx, float starty, const char *text, size_t ma
                                                        break;
                                                }
                                        }
-                                       R_SetupShader_Generic(map->texture, NULL, GL_MODULATE, 1);
+                                       R_SetupShader_Generic(map->pic->tex, NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
                                }
 
                                mapch = ch - map->start;
@@ -1865,10 +1917,10 @@ void DrawQ_SuperPic(float x, float y, cachepic_t *pic, float width, float height
                        width = pic->width;
                if (height == 0)
                        height = pic->height;
-               R_SetupShader_Generic(Draw_GetPicTexture(pic), NULL, GL_MODULATE, 1);
+               R_SetupShader_Generic(Draw_GetPicTexture(pic), NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
        }
        else
-               R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1);
+               R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
 
        floats[2] = floats[5] = floats[8] = floats[11] = 0;
        floats[0] = floats[9] = x;
@@ -1897,7 +1949,7 @@ void DrawQ_Mesh (drawqueuemesh_t *mesh, int flags, qboolean hasalpha)
        DrawQ_ProcessDrawFlag(flags, hasalpha);
 
 //     R_Mesh_ResetTextureState();
-       R_SetupShader_Generic(mesh->texture, NULL, GL_MODULATE, 1);
+       R_SetupShader_Generic(mesh->texture, NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
 
        R_Mesh_PrepareVertices_Generic_Arrays(mesh->num_vertices, mesh->data_vertex3f, mesh->data_color4f, mesh->data_texcoord2f);
        R_Mesh_Draw(0, mesh->num_vertices, 0, mesh->num_triangles, mesh->data_element3i, NULL, 0, mesh->data_element3s, NULL, 0);
@@ -1917,6 +1969,7 @@ void DrawQ_LineLoop (drawqueuemesh_t *mesh, int flags)
        case RENDERPATH_GL11:
        case RENDERPATH_GL13:
        case RENDERPATH_GL20:
+#ifndef USE_GLES2
                CHECKGLERROR
                qglBegin(GL_LINE_LOOP);
                for (num = 0;num < mesh->num_vertices;num++)
@@ -1927,6 +1980,7 @@ void DrawQ_LineLoop (drawqueuemesh_t *mesh, int flags)
                }
                qglEnd();
                CHECKGLERROR
+#endif
                break;
        case RENDERPATH_D3D9:
                //Con_DPrintf("FIXME D3D9 %s:%i %s\n", __FILE__, __LINE__, __FUNCTION__);
@@ -1954,13 +2008,14 @@ void DrawQ_Line (float width, float x1, float y1, float x2, float y2, float r, f
        if(!r_draw2d.integer && !r_draw2d_force)
                return;
 
-       R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1);
+       R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
 
        switch(vid.renderpath)
        {
        case RENDERPATH_GL11:
        case RENDERPATH_GL13:
        case RENDERPATH_GL20:
+#ifndef USE_GLES2
                CHECKGLERROR
 
                //qglLineWidth(width);CHECKGLERROR
@@ -1972,6 +2027,7 @@ void DrawQ_Line (float width, float x1, float y1, float x2, float y2, float r, f
                qglVertex2f(x2, y2);
                qglEnd();
                CHECKGLERROR
+#endif
                break;
        case RENDERPATH_D3D9:
                //Con_DPrintf("FIXME D3D9 %s:%i %s\n", __FILE__, __LINE__, __FUNCTION__);
@@ -2012,7 +2068,7 @@ void DrawQ_Lines (float width, int numlines, const float *vertex3f, const float
        case RENDERPATH_GL20:
                CHECKGLERROR
 
-               R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1);
+               R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1, (flags & DRAWFLAGS_BLEND) ? false : true, true);
 
                //qglLineWidth(width);CHECKGLERROR
 
@@ -2117,11 +2173,41 @@ void R_DrawGamma(void)
        }
        // all the blends ignore depth
 //     R_Mesh_ResetTextureState();
-       R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1);
+       R_SetupShader_Generic(NULL, NULL, GL_MODULATE, 1, true, true);
        GL_DepthMask(true);
        GL_DepthRange(0, 1);
        GL_PolygonOffset(0, 0);
        GL_DepthTest(false);
+
+       // interpretation of brightness and contrast:
+       //   color range := brightness .. (brightness + contrast)
+       // i.e. "c *= contrast; c += brightness"
+       // plausible values for brightness thus range from -contrast to 1
+
+       // apply pre-brightness (subtractive brightness, for where contrast was >= 1)
+       if (vid.support.ext_blend_subtract)
+       {
+               if (v_color_enable.integer)
+               {
+                       c[0] = -v_color_black_r.value / v_color_white_r.value;
+                       c[1] = -v_color_black_g.value / v_color_white_g.value;
+                       c[2] = -v_color_black_b.value / v_color_white_b.value;
+               }
+               else
+                       c[0] = c[1] = c[2] = -v_brightness.value / v_contrast.value;
+               if (c[0] >= 0.01f || c[1] >= 0.01f || c[2] >= 0.01f)
+               {
+                       // need SUBTRACTIVE blending to do this!
+                       GL_BlendEquationSubtract(true);
+                       GL_BlendFunc(GL_ONE, GL_ONE);
+                       GL_Color(c[0], c[1], c[2], 1);
+                       R_Mesh_PrepareVertices_Generic_Arrays(3, blendvertex3f, NULL, NULL);
+                       R_Mesh_Draw(0, 3, 0, 1, polygonelement3i, NULL, 0, polygonelement3s, NULL, 0);
+                       GL_BlendEquationSubtract(false);
+               }
+       }
+
+       // apply contrast
        if (v_color_enable.integer)
        {
                c[0] = v_color_white_r.value;
@@ -2130,17 +2216,32 @@ void R_DrawGamma(void)
        }
        else
                c[0] = c[1] = c[2] = v_contrast.value;
-       if (c[0] >= 1.01f || c[1] >= 1.01f || c[2] >= 1.01f)
+       if (c[0] >= 1.003f || c[1] >= 1.003f || c[2] >= 1.003f)
        {
                GL_BlendFunc(GL_DST_COLOR, GL_ONE);
-               while (c[0] >= 1.01f || c[1] >= 1.01f || c[2] >= 1.01f)
+               while (c[0] >= 1.003f || c[1] >= 1.003f || c[2] >= 1.003f)
                {
-                       GL_Color(c[0] - 1, c[1] - 1, c[2] - 1, 1);
+                       float cc[4];
+                       cc[0] = bound(0, c[0] - 1, 1);
+                       cc[1] = bound(0, c[1] - 1, 1);
+                       cc[2] = bound(0, c[2] - 1, 1);
+                       GL_Color(cc[0], cc[1], cc[2], 1);
                        R_Mesh_PrepareVertices_Generic_Arrays(3, blendvertex3f, NULL, NULL);
                        R_Mesh_Draw(0, 3, 0, 1, polygonelement3i, NULL, 0, polygonelement3s, NULL, 0);
-                       VectorScale(c, 0.5, c);
+                       c[0] /= 1 + cc[0];
+                       c[1] /= 1 + cc[1];
+                       c[2] /= 1 + cc[2];
                }
        }
+       if (c[0] <= 0.997f || c[1] <= 0.997f || c[2] <= 0.997f)
+       {
+               GL_BlendFunc(GL_DST_COLOR, GL_ZERO);
+               GL_Color(c[0], c[1], c[2], 1);
+               R_Mesh_PrepareVertices_Generic_Arrays(3, blendvertex3f, NULL, NULL);
+               R_Mesh_Draw(0, 3, 0, 1, polygonelement3i, NULL, 0, polygonelement3s, NULL, 0);
+       }
+
+       // apply post-brightness (additive brightness, for where contrast was <= 1)
        if (v_color_enable.integer)
        {
                c[0] = v_color_black_r.value;
@@ -2152,7 +2253,7 @@ void R_DrawGamma(void)
        if (c[0] >= 0.01f || c[1] >= 0.01f || c[2] >= 0.01f)
        {
                GL_BlendFunc(GL_ONE, GL_ONE);
-               GL_Color(c[0] - 1, c[1] - 1, c[2] - 1, 1);
+               GL_Color(c[0], c[1], c[2], 1);
                R_Mesh_PrepareVertices_Generic_Arrays(3, blendvertex3f, NULL, NULL);
                R_Mesh_Draw(0, 3, 0, 1, polygonelement3i, NULL, 0, polygonelement3s, NULL, 0);
        }