pixman_rasterize_edges (image, &l, &r, t, b);
}
}
-
-#if 0
-static int
-_GreaterY (pixman_point_fixed_t *a, pixman_point_fixed_t *b)
-{
- if (a->y == b->y)
- return a->x > b->x;
- return a->y > b->y;
-}
-
-/*
- * Note that the definition of this function is a bit odd because
- * of the X coordinate space (y increasing downwards).
- */
-static int
-_Clockwise (pixman_point_fixed_t *ref, pixman_point_fixed_t *a, pixman_point_fixed_t *b)
-{
- pixman_point_fixed_t ad, bd;
-
- ad.x = a->x - ref->x;
- ad.y = a->y - ref->y;
- bd.x = b->x - ref->x;
- bd.y = b->y - ref->y;
-
- return ((pixman_fixed_32_32_t) bd.y * ad.x - (pixman_fixed_32_32_t) ad.y * bd.x) < 0;
-}
-
-/* FIXME -- this could be made more efficient */
-void
-fbAddTriangles (pixman_image_t * pPicture,
- int16_t x_off,
- int16_t y_off,
- int ntri,
- xTriangle *tris)
-{
- pixman_point_fixed_t *top, *left, *right, *tmp;
- xTrapezoid trap;
-
- for (; ntri; ntri--, tris++)
- {
- top = &tris->p1;
- left = &tris->p2;
- right = &tris->p3;
- if (_GreaterY (top, left)) {
- tmp = left; left = top; top = tmp;
- }
- if (_GreaterY (top, right)) {
- tmp = right; right = top; top = tmp;
- }
- if (_Clockwise (top, right, left)) {
- tmp = right; right = left; left = tmp;
- }
-
- /*
- * Two cases:
- *
- * + +
- * / \ / \
- * / \ / \
- * / + + \
- * / -- -- \
- * / -- -- \
- * / --- --- \
- * +-- --+
- */
-
- trap.top = top->y;
- trap.left.p1 = *top;
- trap.left.p2 = *left;
- trap.right.p1 = *top;
- trap.right.p2 = *right;
- if (right->y < left->y)
- trap.bottom = right->y;
- else
- trap.bottom = left->y;
- fbRasterizeTrapezoid (pPicture, &trap, x_off, y_off);
- if (right->y < left->y)
- {
- trap.top = right->y;
- trap.bottom = left->y;
- trap.right.p1 = *right;
- trap.right.p2 = *left;
- }
- else
- {
- trap.top = left->y;
- trap.bottom = right->y;
- trap.left.p1 = *left;
- trap.left.p2 = *right;
- }
- fbRasterizeTrapezoid (pPicture, &trap, x_off, y_off);
- }
-}
-#endif