i915_context.c revision 9851644435f991a1a1bbb145333a97601627b37d 
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_batch.h"
32
33#include "draw/draw_context.h"
34#include "pipe/p_defines.h"
35#include "pipe/p_inlines.h"
36#include "util/u_memory.h"
37#include "pipe/p_screen.h"
38
39
40/*
41 * Draw functions
42 */
43
44
45static void
46i915_draw_range_elements(struct pipe_context *pipe,
47                         struct pipe_buffer *indexBuffer,
48                         unsigned indexSize,
49                         unsigned min_index,
50                         unsigned max_index,
51                         unsigned prim, unsigned start, unsigned count)
52{
53   struct i915_context *i915 = i915_context(pipe);
54   struct draw_context *draw = i915->draw;
55   unsigned i;
56
57   if (i915->dirty)
58      i915_update_derived(i915);
59
60   /*
61    * Map vertex buffers
62    */
63   for (i = 0; i < i915->num_vertex_buffers; i++) {
64      void *buf = pipe_buffer_map(pipe->screen, i915->vertex_buffer[i].buffer,
65                                  PIPE_BUFFER_USAGE_CPU_READ);
66      draw_set_mapped_vertex_buffer(draw, i, buf);
67   }
68
69   /*
70    * Map index buffer, if present
71    */
72   if (indexBuffer) {
73      void *mapped_indexes = pipe_buffer_map(pipe->screen, indexBuffer,
74                                             PIPE_BUFFER_USAGE_CPU_READ);
75      draw_set_mapped_element_buffer_range(draw, indexSize,
76                                           min_index,
77                                           max_index,
78                                           mapped_indexes);
79   } else {
80      draw_set_mapped_element_buffer(draw, 0, NULL);
81   }
82
83
84   draw_set_mapped_constant_buffer(draw, PIPE_SHADER_VERTEX, 0,
85                                   i915->current.constants[PIPE_SHADER_VERTEX],
86                                   (i915->current.num_user_constants[PIPE_SHADER_VERTEX] *
87                                      4 * sizeof(float)));
88
89   /*
90    * Do the drawing
91    */
92   draw_arrays(i915->draw, prim, start, count);
93
94   /*
95    * unmap vertex/index buffers
96    */
97   for (i = 0; i < i915->num_vertex_buffers; i++) {
98      pipe_buffer_unmap(pipe->screen, i915->vertex_buffer[i].buffer);
99      draw_set_mapped_vertex_buffer(draw, i, NULL);
100   }
101
102   if (indexBuffer) {
103      pipe_buffer_unmap(pipe->screen, indexBuffer);
104      draw_set_mapped_element_buffer_range(draw, 0, start, start + count - 1, NULL);
105   }
106}
107
108static void
109i915_draw_elements(struct pipe_context *pipe,
110                   struct pipe_buffer *indexBuffer,
111                   unsigned indexSize,
112                   unsigned prim, unsigned start, unsigned count)
113{
114   i915_draw_range_elements(pipe, indexBuffer,
115                            indexSize,
116                            0, 0xffffffff,
117                            prim, start, count);
118}
119
120static void
121i915_draw_arrays(struct pipe_context *pipe,
122                 unsigned prim, unsigned start, unsigned count)
123{
124   i915_draw_elements(pipe, NULL, 0, prim, start, count);
125}
126
127
128/*
129 * Is referenced functions
130 */
131
132
133static unsigned int
134i915_is_texture_referenced(struct pipe_context *pipe,
135                           struct pipe_texture *texture,
136                           unsigned face, unsigned level)
137{
138   /**
139    * FIXME: Return the corrent result. We can't alays return referenced
140    *        since it causes a double flush within the vbo module.
141    */
142#if 0
143   return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
144#else
145   return 0;
146#endif
147}
148
149static unsigned int
150i915_is_buffer_referenced(struct pipe_context *pipe,
151                          struct pipe_buffer *buf)
152{
153   /*
154    * Since we never expose hardware buffers to the state tracker
155    * they can never be referenced, so this isn't a lie
156    */
157   return 0;
158}
159
160
161/*
162 * Generic context functions
163 */
164
165
166static void i915_destroy(struct pipe_context *pipe)
167{
168   struct i915_context *i915 = i915_context(pipe);
169   int i;
170
171   draw_destroy(i915->draw);
172
173   if(i915->batch)
174      i915->iws->batchbuffer_destroy(i915->batch);
175
176   /* unbind framebuffer */
177   for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
178      pipe_surface_reference(&i915->framebuffer.cbufs[i], NULL);
179   }
180   pipe_surface_reference(&i915->framebuffer.zsbuf, NULL);
181
182   FREE(i915);
183}
184
185struct pipe_context *
186i915_create_context(struct pipe_screen *screen)
187{
188   struct i915_context *i915;
189
190   i915 = CALLOC_STRUCT(i915_context);
191   if (i915 == NULL)
192      return NULL;
193
194   i915->iws = i915_screen(screen)->iws;
195   i915->base.winsys = NULL;
196   i915->base.screen = screen;
197
198   i915->base.destroy = i915_destroy;
199
200   i915->base.clear = i915_clear;
201
202   i915->base.draw_arrays = i915_draw_arrays;
203   i915->base.draw_elements = i915_draw_elements;
204   i915->base.draw_range_elements = i915_draw_range_elements;
205
206   i915->base.is_texture_referenced = i915_is_texture_referenced;
207   i915->base.is_buffer_referenced = i915_is_buffer_referenced;
208
209   /*
210    * Create drawing context and plug our rendering stage into it.
211    */
212   i915->draw = draw_create();
213   assert(i915->draw);
214   if (!debug_get_bool_option("I915_NO_VBUF", FALSE)) {
215      draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
216   } else {
217      draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
218   }
219
220   i915_init_surface_functions(i915);
221   i915_init_state_functions(i915);
222   i915_init_flush_functions(i915);
223
224   draw_install_aaline_stage(i915->draw, &i915->base);
225   draw_install_aapoint_stage(i915->draw, &i915->base);
226
227   i915->dirty = ~0;
228   i915->hardware_dirty = ~0;
229
230   /* Batch stream debugging is a bit hacked up at the moment:
231    */
232   i915->batch = i915->iws->batchbuffer_create(i915->iws);
233
234   return &i915->base;
235}
236