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-rw-r--r--src/gallium/auxiliary/util/u_draw_quad.c59
-rw-r--r--src/gallium/auxiliary/util/u_draw_quad.h16
2 files changed, 55 insertions, 20 deletions
diff --git a/src/gallium/auxiliary/util/u_draw_quad.c b/src/gallium/auxiliary/util/u_draw_quad.c
index 79a69de633d..37e85336091 100644
--- a/src/gallium/auxiliary/util/u_draw_quad.c
+++ b/src/gallium/auxiliary/util/u_draw_quad.c
@@ -34,15 +34,51 @@
/**
+ * Draw a simple vertex buffer / primitive.
+ * Limited to float[4] vertex attribs, tightly packed.
+ */
+void
+util_draw_vertex_buffer(struct pipe_context *pipe,
+ struct pipe_buffer *vbuf,
+ uint prim_type,
+ uint num_verts,
+ uint num_attribs)
+{
+ struct pipe_vertex_buffer vbuffer;
+ struct pipe_vertex_element velement;
+ uint i;
+
+ /* tell pipe about the vertex buffer */
+ vbuffer.buffer = vbuf;
+ vbuffer.pitch = num_attribs * 4 * sizeof(float); /* vertex size */
+ vbuffer.buffer_offset = 0;
+ pipe->set_vertex_buffer(pipe, 0, &vbuffer);
+
+ /* tell pipe about the vertex attributes */
+ for (i = 0; i < num_attribs; i++) {
+ velement.src_offset = i * 4 * sizeof(float);
+ velement.vertex_buffer_index = 0;
+ velement.src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+ velement.nr_components = 4;
+ pipe->set_vertex_element(pipe, i, &velement);
+ }
+
+ /* draw */
+ pipe->draw_arrays(pipe, prim_type, 0, num_verts);
+}
+
+
+
+/**
* Draw screen-aligned textured quad.
+ * Note: this function allocs/destroys a vertex buffer and isn't especially
+ * efficient.
*/
void
util_draw_texquad(struct pipe_context *pipe,
float x0, float y0, float x1, float y1, float z)
{
struct pipe_buffer *vbuf;
- struct pipe_vertex_buffer vbuffer;
- struct pipe_vertex_element velement;
uint numAttribs = 2, vertexBytes, i, j;
float *v;
@@ -89,24 +125,7 @@ util_draw_texquad(struct pipe_context *pipe,
pipe->winsys->buffer_unmap(pipe->winsys, vbuf);
- /* tell pipe about the vertex buffer */
- vbuffer.buffer = vbuf;
- vbuffer.pitch = numAttribs * 4 * sizeof(float); /* vertex size */
- vbuffer.buffer_offset = 0;
- pipe->set_vertex_buffer(pipe, 0, &vbuffer);
-
- /* tell pipe about the vertex attributes */
- for (i = 0; i < numAttribs; i++) {
- velement.src_offset = i * 4 * sizeof(float);
- velement.vertex_buffer_index = 0;
- velement.src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
- velement.nr_components = 4;
- pipe->set_vertex_element(pipe, i, &velement);
- }
-
- /* draw */
- pipe->draw_arrays(pipe, PIPE_PRIM_TRIANGLE_FAN, 0, 4);
+ util_draw_vertex_buffer(pipe, vbuf, PIPE_PRIM_TRIANGLE_FAN, 4, 2);
- /* XXX: do one-time */
pipe_buffer_reference(pipe->winsys, &vbuf, NULL);
}
diff --git a/src/gallium/auxiliary/util/u_draw_quad.h b/src/gallium/auxiliary/util/u_draw_quad.h
index a97f55d2efd..5b6539a99ca 100644
--- a/src/gallium/auxiliary/util/u_draw_quad.h
+++ b/src/gallium/auxiliary/util/u_draw_quad.h
@@ -29,9 +29,25 @@
#define U_DRAWQUAD_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+extern void
+util_draw_vertex_buffer(struct pipe_context *pipe,
+ struct pipe_buffer *vbuf,
+ uint num_attribs, uint num_verts, uint prim_type);
+
+
extern void
util_draw_texquad(struct pipe_context *pipe,
float x0, float y0, float x1, float y1, float z);
+#ifdef __cplusplus
+}
+#endif
+
+
#endif