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authorBrian <brian.paul@tungstengraphics.com>2008-03-17 15:37:42 -0600
committerBrian <brian.paul@tungstengraphics.com>2008-03-17 15:37:42 -0600
commite3a747f1fefc147e8dca5729bcc8d68f419c595a (patch)
tree333b68708ae23fec9750166b4de1599a24bb5355
parent22b9cc3f5f6c900559332f7a30c9cf869e3490d6 (diff)
gallium: new util_draw_texquad() function.
-rw-r--r--src/gallium/auxiliary/util/u_draw_quad.c112
-rw-r--r--src/gallium/auxiliary/util/u_draw_quad.h37
2 files changed, 149 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_draw_quad.c b/src/gallium/auxiliary/util/u_draw_quad.c
new file mode 100644
index 0000000000..79a69de633
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_draw_quad.c
@@ -0,0 +1,112 @@
+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_winsys.h"
+#include "util/u_draw_quad.h"
+
+
+/**
+ * Draw screen-aligned textured quad.
+ */
+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;
+
+ vertexBytes = 4 * (4 * numAttribs * sizeof(float));
+
+ /* XXX create one-time */
+ vbuf = pipe->winsys->buffer_create(pipe->winsys, 32,
+ PIPE_BUFFER_USAGE_VERTEX, vertexBytes);
+ assert(vbuf);
+
+ v = (float *) pipe->winsys->buffer_map(pipe->winsys, vbuf,
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+
+ /*
+ * Load vertex buffer
+ */
+ for (i = j = 0; i < 4; i++) {
+ v[j + 2] = z; /* z */
+ v[j + 3] = 1.0; /* w */
+ v[j + 6] = 0.0; /* r */
+ v[j + 7] = 1.0; /* q */
+ j += 8;
+ }
+
+ v[0] = x0;
+ v[1] = y0;
+ v[4] = 0.0; /*s*/
+ v[5] = 0.0; /*t*/
+
+ v[8] = x1;
+ v[9] = y0;
+ v[12] = 1.0;
+ v[13] = 0.0;
+
+ v[16] = x1;
+ v[17] = y1;
+ v[20] = 1.0;
+ v[21] = 1.0;
+
+ v[24] = x0;
+ v[25] = y1;
+ v[28] = 0.0;
+ v[29] = 1.0;
+
+ 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);
+
+ /* 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
new file mode 100644
index 0000000000..a97f55d2ef
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_draw_quad.h
@@ -0,0 +1,37 @@
+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#ifndef U_DRAWQUAD_H
+#define U_DRAWQUAD_H
+
+
+extern void
+util_draw_texquad(struct pipe_context *pipe,
+ float x0, float y0, float x1, float y1, float z);
+
+
+#endif