fix particle blending

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@10723 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/dpsoftrast.c b/dpsoftrast.c
index 7669562b95bc31c9afcbc6367fabd263952267fb..ea78f814b6c92c23d1500af4b611293413c75b1e 100644 (file)
--- a/dpsoftrast.c
+++ b/dpsoftrast.c
@@ -152,6 +152,7 @@ typedef enum DPSOFTRAST_BLENDMODE_e
        DPSOFTRAST_BLENDMODE_MUL,
        DPSOFTRAST_BLENDMODE_MUL2,
        DPSOFTRAST_BLENDMODE_SUBALPHA,
+       DPSOFTRAST_BLENDMODE_PSEUDOALPHA,
        DPSOFTRAST_BLENDMODE_TOTAL
 }
 DPSOFTRAST_BLENDMODE;
@@ -278,6 +279,7 @@ int blendmodetable[][4] =
        {DPSOFTRAST_BLENDMODE_MUL, GL_ZERO, GL_SRC_COLOR, false},
        {DPSOFTRAST_BLENDMODE_MUL, GL_DST_COLOR, GL_ZERO, false},
        {DPSOFTRAST_BLENDMODE_MUL2, GL_DST_COLOR, GL_SRC_COLOR, false},
+       {DPSOFTRAST_BLENDMODE_PSEUDOALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA, false},
        {DPSOFTRAST_BLENDMODE_SUBALPHA, GL_SRC_COLOR, GL_ONE, true}
 };
 
@@ -1313,6 +1315,23 @@ void DPSOFTRAST_Draw_Span_Finish(const DPSOFTRAST_State_Draw_Span *span, const f
                        pixel[x*4+2] = d[2];
                        pixel[x*4+3] = d[3];
                }
+       case DPSOFTRAST_BLENDMODE_PSEUDOALPHA:
+               for (x = startx;x < endx;x++)
+               {
+                       if (!pixelmask[x])
+                               continue;
+                       a = 255.0f;
+                       b = 1.0f - in4f[x*4+3];
+                       d[0] = (int)(in4f[x*4+2]*a+pixel[x*4+0]*b);if (d[0] > 255) d[0] = 255;
+                       d[1] = (int)(in4f[x*4+1]*a+pixel[x*4+1]*b);if (d[1] > 255) d[1] = 255;
+                       d[2] = (int)(in4f[x*4+0]*a+pixel[x*4+2]*b);if (d[2] > 255) d[2] = 255;
+                       d[3] = (int)(in4f[x*4+3]*a+pixel[x*4+3]*b);if (d[3] > 255) d[3] = 255;
+                       pixel[x*4+0] = d[0];
+                       pixel[x*4+1] = d[1];
+                       pixel[x*4+2] = d[2];
+                       pixel[x*4+3] = d[3];
+               }
+               break;
                break;
        }
 }