**************************************************************************/
-/**
- * Pipe copy/fill rect helpers.
- */
-
-
#ifndef U_RECT_H
#define U_RECT_H
+#include "pipe/p_compiler.h"
-#include "pipe/p_format.h"
-
-struct pipe_context;
-struct pipe_surface;
+#ifdef __cplusplus
+extern "C" {
+#endif
+struct u_rect {
+ int x0, x1;
+ int y0, y1;
+};
-extern void
-pipe_copy_rect(ubyte * dst, const struct pipe_format_block *block,
- unsigned dst_stride, unsigned dst_x, unsigned dst_y,
- unsigned width, unsigned height, const ubyte * src,
- int src_stride, unsigned src_x, int src_y);
-
-extern void
-pipe_fill_rect(ubyte * dst, const struct pipe_format_block *block,
- unsigned dst_stride, unsigned dst_x, unsigned dst_y,
- unsigned width, unsigned height, uint32_t value);
+/* Do two rectangles intersect?
+ */
+static INLINE boolean
+u_rect_test_intersection(const struct u_rect *a,
+ const struct u_rect *b)
+{
+ return (!(a->x1 < b->x0 ||
+ b->x1 < a->x0 ||
+ a->y1 < b->y0 ||
+ b->y1 < a->y0));
+}
+/* Find the intersection of two rectangles known to intersect.
+ */
+static INLINE void
+u_rect_find_intersection(const struct u_rect *a,
+ struct u_rect *b)
+{
+ /* Caller should verify intersection exists before calling.
+ */
+ if (b->x0 < a->x0) b->x0 = a->x0;
+ if (b->x1 > a->x1) b->x1 = a->x1;
+ if (b->y0 < a->y0) b->y0 = a->y0;
+ if (b->y1 > a->y1) b->y1 = a->y1;
+}
-extern void
-util_surface_copy(struct pipe_context *pipe,
- boolean do_flip,
- struct pipe_surface *dst,
- unsigned dst_x, unsigned dst_y,
- struct pipe_surface *src,
- unsigned src_x, unsigned src_y,
- unsigned w, unsigned h);
-extern void
-util_surface_fill(struct pipe_context *pipe,
- struct pipe_surface *dst,
- unsigned dstx, unsigned dsty,
- unsigned width, unsigned height, unsigned value);
+static INLINE void
+u_rect_possible_intersection(const struct u_rect *a,
+ struct u_rect *b)
+{
+ if (u_rect_test_intersection(a,b)) {
+ u_rect_find_intersection(a,b);
+ }
+ else {
+ b->x0 = b->x1 = b->y0 = b->y1 = 0;
+ }
+}
+#ifdef __cplusplus
+}
+#endif
#endif /* U_RECT_H */