i915_context.c revision a57f84251926045a3358822d0fd92ca95a4f0fde 
1/**************************************************************************
2 *
3 * Copyright 2003 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:
13 *
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.
17 *
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.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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.
25 *
26 **************************************************************************/
27
28#include "i915_context.h"
29#include "i915_state.h"
30#include "i915_screen.h"
31#include "i915_surface.h"
32#include "i915_batch.h"
33#include "i915_resource.h"
34
35#include "draw/draw_context.h"
36#include "pipe/p_defines.h"
37#include "util/u_inlines.h"
38#include "util/u_memory.h"
39#include "pipe/p_screen.h"
40
41
42/*
43 * Draw functions
44 */
45
46
47static void
48i915_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
49{
50   struct i915_context *i915 = i915_context(pipe);
51   struct draw_context *draw = i915->draw;
52   void *mapped_indices = NULL;
53   unsigned i;
54
55   if (i915->dirty)
56      i915_update_derived(i915);
57
58   /*
59    * Map vertex buffers
60    */
61   for (i = 0; i < i915->num_vertex_buffers; i++) {
62      void *buf = i915_buffer(i915->vertex_buffer[i].buffer)->data;
63      draw_set_mapped_vertex_buffer(draw, i, buf);
64   }
65
66   /*
67    * Map index buffer, if present
68    */
69   if (info->indexed && i915->index_buffer.buffer) {
70      mapped_indices = i915_buffer(i915->index_buffer.buffer)->data;
71      mapped_indices += i915->index_buffer.offset;
72   }
73
74   draw_set_mapped_element_buffer_range(draw, (mapped_indices) ?
75                                        i915->index_buffer.index_size : 0,
76                                        info->index_bias,
77                                        info->min_index,
78                                        info->max_index,
79                                        mapped_indices);
80
81
82   draw_set_mapped_constant_buffer(draw, PIPE_SHADER_VERTEX, 0,
83                                   i915->current.constants[PIPE_SHADER_VERTEX],
84                                   (i915->current.num_user_constants[PIPE_SHADER_VERTEX] *
85                                      4 * sizeof(float)));
86
87   /*
88    * Do the drawing
89    */
90   draw_arrays(i915->draw, info->mode, info->start, info->count);
91
92   /*
93    * unmap vertex/index buffers
94    */
95   for (i = 0; i < i915->num_vertex_buffers; i++) {
96      draw_set_mapped_vertex_buffer(draw, i, NULL);
97   }
98
99   if (mapped_indices) {
100      draw_set_mapped_element_buffer(draw, 0, 0, NULL);
101   }
102}
103
104
105/*
106 * Generic context functions
107 */
108
109
110static void i915_destroy(struct pipe_context *pipe)
111{
112   struct i915_context *i915 = i915_context(pipe);
113   int i;
114
115   draw_destroy(i915->draw);
116
117   if(i915->batch)
118      i915->iws->batchbuffer_destroy(i915->batch);
119
120   /* unbind framebuffer */
121   for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
122      pipe_surface_reference(&i915->framebuffer.cbufs[i], NULL);
123   }
124   pipe_surface_reference(&i915->framebuffer.zsbuf, NULL);
125
126   FREE(i915);
127}
128
129struct pipe_context *
130i915_create_context(struct pipe_screen *screen, void *priv)
131{
132   struct i915_context *i915;
133
134   i915 = CALLOC_STRUCT(i915_context);
135   if (i915 == NULL)
136      return NULL;
137
138   i915->iws = i915_screen(screen)->iws;
139   i915->base.winsys = NULL;
140   i915->base.screen = screen;
141   i915->base.priv = priv;
142
143   i915->base.destroy = i915_destroy;
144
145   i915->base.clear = i915_clear;
146
147   i915->base.draw_vbo = i915_draw_vbo;
148
149   /*
150    * Create drawing context and plug our rendering stage into it.
151    */
152   i915->draw = draw_create(&i915->base);
153   assert(i915->draw);
154   if (!debug_get_bool_option("I915_NO_VBUF", FALSE)) {
155      draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
156   } else {
157      draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
158   }
159
160   i915_init_surface_functions(i915);
161   i915_init_state_functions(i915);
162   i915_init_flush_functions(i915);
163   i915_init_resource_functions(i915);
164
165   draw_install_aaline_stage(i915->draw, &i915->base);
166   draw_install_aapoint_stage(i915->draw, &i915->base);
167
168   i915->dirty = ~0;
169   i915->hardware_dirty = ~0;
170
171   /* Batch stream debugging is a bit hacked up at the moment:
172    */
173   i915->batch = i915->iws->batchbuffer_create(i915->iws);
174
175   return &i915->base;
176}
177