multiply overflow fixes

[swftools.git] / lib / modules / swfrender.c

diff --git a/lib/modules/swfrender.c b/lib/modules/swfrender.c
index 9df996f..6c5262a 100644 (file)
--- a/lib/modules/swfrender.c
+++ b/lib/modules/swfrender.c
@@ -680,8 +680,6 @@ static void fill_gradient(RGBA*line, int*z, int y, int x1, int x2, MATRIX*m, GRA
            RGBA col;
            double xx = (  (x - rx) * m22 - (y - ry) * m21)*det;
            double yy = (- (x - rx) * m12 + (y - ry) * m11)*det;
-           int ainv;
-           ainv = 255-col.a;
 
            if(type == FILL_LINEAR) {
                int xr = xx*256;
@@ -698,7 +696,8 @@ static void fill_gradient(RGBA*line, int*z, int y, int x1, int x2, MATRIX*m, GRA
                    xr = 511;
                col = palette[xr];
            }
-
+           int ainv;
+           ainv = 255-col.a;
            line[x].r = clamp(((line[x].r*ainv)>>8)+col.r);
            line[x].g = clamp(((line[x].g*ainv)>>8)+col.g);
            line[x].b = clamp(((line[x].b*ainv)>>8)+col.b);