glsl2: Add and use new variable mode ir_var_temporary
[mesa/nouveau-pmpeg.git] / src / gallium / drivers / llvmpipe / lp_draw_arrays.c
blob98780d7631b466e9d250219dcb1aadd7ea4e84d5
1 /**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 /* Author:
29 * Brian Paul
30 * Keith Whitwell
34 #include "pipe/p_defines.h"
35 #include "pipe/p_context.h"
36 #include "util/u_prim.h"
38 #include "lp_context.h"
39 #include "lp_state.h"
41 #include "draw/draw_context.h"
45 /**
46 * Draw vertex arrays, with optional indexing.
47 * Basically, map the vertex buffers (and drawing surfaces), then hand off
48 * the drawing to the 'draw' module.
50 static void
51 llvmpipe_draw_range_elements(struct pipe_context *pipe,
52 struct pipe_resource *indexBuffer,
53 unsigned indexSize,
54 int indexBias,
55 unsigned min_index,
56 unsigned max_index,
57 unsigned mode, unsigned start, unsigned count)
59 struct llvmpipe_context *lp = llvmpipe_context(pipe);
60 struct draw_context *draw = lp->draw;
61 unsigned i;
63 if (lp->dirty)
64 llvmpipe_update_derived( lp );
67 * Map vertex buffers
69 for (i = 0; i < lp->num_vertex_buffers; i++) {
70 void *buf = llvmpipe_resource_data(lp->vertex_buffer[i].buffer);
71 draw_set_mapped_vertex_buffer(draw, i, buf);
74 /* Map index buffer, if present */
75 if (indexBuffer) {
76 void *mapped_indexes = llvmpipe_resource_data(indexBuffer);
77 draw_set_mapped_element_buffer_range(draw, indexSize, indexBias,
78 min_index,
79 max_index,
80 mapped_indexes);
82 else {
83 /* no index/element buffer */
84 draw_set_mapped_element_buffer_range(draw, 0, 0, start,
85 start + count - 1, NULL);
88 /* draw! */
89 draw_arrays(draw, mode, start, count);
92 * unmap vertex/index buffers
94 for (i = 0; i < lp->num_vertex_buffers; i++) {
95 draw_set_mapped_vertex_buffer(draw, i, NULL);
97 if (indexBuffer) {
98 draw_set_mapped_element_buffer(draw, 0, 0, NULL);
102 * TODO: Flush only when a user vertex/index buffer is present
103 * (or even better, modify draw module to do this
104 * internally when this condition is seen?)
106 draw_flush(draw);
110 static void
111 llvmpipe_draw_elements(struct pipe_context *pipe,
112 struct pipe_resource *indexBuffer,
113 unsigned indexSize,
114 int indexBias,
115 unsigned mode, unsigned start, unsigned count)
117 llvmpipe_draw_range_elements( pipe, indexBuffer,
118 indexSize, indexBias,
119 0, 0xffffffff,
120 mode, start, count );
124 static void
125 llvmpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
126 unsigned start, unsigned count)
128 llvmpipe_draw_elements(pipe, NULL, 0, 0, mode, start, count);
132 void
133 llvmpipe_init_draw_funcs(struct llvmpipe_context *llvmpipe)
135 llvmpipe->pipe.draw_arrays = llvmpipe_draw_arrays;
136 llvmpipe->pipe.draw_elements = llvmpipe_draw_elements;
137 llvmpipe->pipe.draw_range_elements = llvmpipe_draw_range_elements;