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swrast: avoid large stack allocations in blend code

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This commit is contained in:
Brian Paul
2010-12-02 14:18:18 -07:00
parent 2addcb7b50
commit 25662f878e
1 changed files with 13 additions and 1 deletions
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src/mesa/swrast/s_blend.c
+13 -1
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@@ -819,7 +819,16 @@ static void
blend_general(struct gl_context *ctx, GLuint n, const GLubyte mask[],
void *src, const void *dst, GLenum chanType)
{
GLfloat rgbaF[MAX_WIDTH][4], destF[MAX_WIDTH][4];
GLfloat (*rgbaF)[4], (*destF)[4];
rgbaF = (GLfloat (*)[4]) malloc(4 * n * sizeof(GLfloat));
destF = (GLfloat (*)[4]) malloc(4 * n * sizeof(GLfloat));
if (!rgbaF || !destF) {
free(rgbaF);
free(destF);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "blending");
return;
}
if (chanType == GL_UNSIGNED_BYTE) {
GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
@@ -883,6 +892,9 @@ blend_general(struct gl_context *ctx, GLuint n, const GLubyte mask[],
blend_general_float(ctx, n, mask, (GLfloat (*)[4]) src,
(GLfloat (*)[4]) dst, chanType);
}
free(rgbaF);
free(destF);
}