preserve alpha

diff --git a/lib/devices/render.c b/lib/devices/render.c
index 2449a2c..5a9504b 100644 (file)
--- a/lib/devices/render.c
+++ b/lib/devices/render.c
@@ -272,13 +272,13 @@ static void fill_line_solid(RGBA*line, U32*z, int y, int x1, int x2, RGBA col)
         col.r = (col.r*col.a)>>8;
         col.g = (col.g*col.a)>>8;
         col.b = (col.b*col.a)>>8;
-        col.a = 255;
         do {
            if(z[bitpos]&bit) {
                line[x].r = ((line[x].r*ainv)>>8)+col.r;
                line[x].g = ((line[x].g*ainv)>>8)+col.g;
                line[x].b = ((line[x].b*ainv)>>8)+col.b;
-               line[x].a = 255;
+               //line[x].a = 255;
+               line[x].a = ((line[x].a*ainv)>>8)+col.a;
            }
            bit <<= 1;
            if(!bit) {