src/gallium/drivers/i915simple/i915_context.c

   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_winsys.h"
  30 #include "i915_state.h"
  31 #include "i915_batch.h"
  32 #include "i915_texture.h"
  33 #include "i915_reg.h"
  34
  35 #include "draw/draw_context.h"
  36 #include "pipe/p_defines.h"
  37 #include "pipe/p_winsys.h"
  38 #include "pipe/p_util.h"
  39 #include "pipe/p_screen.h"
  40
  41
  42 static void i915_destroy( struct pipe_context *pipe )
  43 {
  44    struct i915_context *i915 = i915_context( pipe );
  45
  46    draw_destroy( i915->draw );
  47
  48    FREE( i915 );
  49 }
  50
  51
  52 static boolean
  53 i915_draw_elements( struct pipe_context *pipe,
  54                     struct pipe_buffer *indexBuffer,
  55                     unsigned indexSize,
  56                     unsigned prim, unsigned start, unsigned count)
  57 {
  58    struct i915_context *i915 = i915_context( pipe );
  59    struct draw_context *draw = i915->draw;
  60    unsigned i;
  61
  62    if (i915->dirty)
  63       i915_update_derived( i915 );
  64
  65    /*
  66     * Map vertex buffers
  67     */
  68    for (i = 0; i < PIPE_ATTRIB_MAX; i++) {
  69       if (i915->vertex_buffer[i].buffer) {
  70          void *buf
  71             = pipe->winsys->buffer_map(pipe->winsys,
  72                                        i915->vertex_buffer[i].buffer,
  73                                        PIPE_BUFFER_USAGE_CPU_READ);
  74          draw_set_mapped_vertex_buffer(draw, i, buf);
  75       }
  76    }
  77    /* Map index buffer, if present */
  78    if (indexBuffer) {
  79       void *mapped_indexes
  80          = pipe->winsys->buffer_map(pipe->winsys, indexBuffer,
  81                                     PIPE_BUFFER_USAGE_CPU_READ);
  82       draw_set_mapped_element_buffer(draw, indexSize, mapped_indexes);
  83    }
  84    else {
  85       /* no index/element buffer */
  86       draw_set_mapped_element_buffer(draw, 0, NULL);
  87    }
  88
  89
  90    draw_set_mapped_constant_buffer(draw,
  91                                 i915->current.constants[PIPE_SHADER_VERTEX]);
  92
  93    /* draw! */
  94    draw_arrays(i915->draw, prim, start, count);
  95
  96    /*
  97     * unmap vertex/index buffers
  98     */
  99    for (i = 0; i < PIPE_ATTRIB_MAX; i++) {
 100       if (i915->vertex_buffer[i].buffer) {
 101          pipe->winsys->buffer_unmap(pipe->winsys, i915->vertex_buffer[i].buffer);
 102          draw_set_mapped_vertex_buffer(draw, i, NULL);
 103       }
 104    }
 105    if (indexBuffer) {
 106       pipe->winsys->buffer_unmap(pipe->winsys, indexBuffer);
 107       draw_set_mapped_element_buffer(draw, 0, NULL);
 108    }
 109
 110    return TRUE;
 111 }
 112
 113
 114 static boolean i915_draw_arrays( struct pipe_context *pipe,
 115                                  unsigned prim, unsigned start, unsigned count)
 116 {
 117    return i915_draw_elements(pipe, NULL, 0, prim, start, count);
 118 }
 119
 120
 121
 122 struct pipe_context *i915_create_context( struct pipe_screen *screen,
 123                                           struct pipe_winsys *pipe_winsys,
 124                                           struct i915_winsys *i915_winsys )
 125 {
 126    struct i915_context *i915;
 127
 128    i915 = CALLOC_STRUCT(i915_context);
 129    if (i915 == NULL)
 130       return NULL;
 131
 132    i915->winsys = i915_winsys;
 133    i915->pipe.winsys = pipe_winsys;
 134    i915->pipe.screen = screen;
 135
 136    i915->pipe.destroy = i915_destroy;
 137
 138    i915->pipe.clear = i915_clear;
 139
 140
 141    i915->pipe.draw_arrays = i915_draw_arrays;
 142    i915->pipe.draw_elements = i915_draw_elements;
 143
 144    /*
 145     * Create drawing context and plug our rendering stage into it.
 146     */
 147    i915->draw = draw_create();
 148    assert(i915->draw);
 149    if (GETENV("I915_VBUF")) {
 150       draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
 151    }
 152    else {
 153       draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
 154    }
 155
 156    i915_init_surface_functions(i915);
 157    i915_init_state_functions(i915);
 158    i915_init_flush_functions(i915);
 159    i915_init_texture_functions(i915);
 160
 161    draw_install_aaline_stage(i915->draw, &i915->pipe);
 162    draw_install_aapoint_stage(i915->draw, &i915->pipe);
 163
 164    i915->dirty = ~0;
 165    i915->hardware_dirty = ~0;
 166
 167    /* Batch stream debugging is a bit hacked up at the moment:
 168     */
 169    i915->batch_start = NULL;
 170
 171    return &i915->pipe;
 172 }
 173