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_inlines.h"
  39 #include "util/u_memory.h"
  40 #include "pipe/p_screen.h"
  41
  42
  43 static void i915_destroy( struct pipe_context *pipe )
  44 {
  45    struct i915_context *i915 = i915_context( pipe );
  46
  47    draw_destroy( i915->draw );
  48
  49    if(i915->winsys->destroy)
  50       i915->winsys->destroy(i915->winsys);
  51
  52    FREE( i915 );
  53 }
  54
  55
  56 static boolean
  57 i915_draw_range_elements(struct pipe_context *pipe,
  58                              struct pipe_buffer *indexBuffer,
  59                              unsigned indexSize,
  60                              unsigned min_index,
  61                              unsigned max_index,
  62                              unsigned prim, unsigned start, unsigned count)
  63 {
  64    struct i915_context *i915 = i915_context( pipe );
  65    struct draw_context *draw = i915->draw;
  66    unsigned i;
  67
  68    if (i915->dirty)
  69       i915_update_derived( i915 );
  70
  71    /*
  72     * Map vertex buffers
  73     */
  74    for (i = 0; i < i915->num_vertex_buffers; i++) {
  75       void *buf
  76          = pipe_buffer_map(pipe->screen,
  77                                     i915->vertex_buffer[i].buffer,
  78                                     PIPE_BUFFER_USAGE_CPU_READ);
  79       draw_set_mapped_vertex_buffer(draw, i, buf);
  80    }
  81    /* Map index buffer, if present */
  82    if (indexBuffer) {
  83       void *mapped_indexes
  84          = pipe_buffer_map(pipe->screen, indexBuffer,
  85                                     PIPE_BUFFER_USAGE_CPU_READ);
  86       draw_set_mapped_element_buffer_range(draw, indexSize,
  87                                            min_index,
  88                                            max_index,
  89                                            mapped_indexes);
  90    }
  91    else {
  92       /* no index/element buffer */
  93       draw_set_mapped_element_buffer(draw, 0, NULL);
  94    }
  95
  96
  97    draw_set_mapped_constant_buffer(draw,
  98                                    i915->current.constants[PIPE_SHADER_VERTEX],
  99                                    ( i915->current.num_user_constants[PIPE_SHADER_VERTEX] *
 100                                      4 * sizeof(float) ));
 101
 102    /* draw! */
 103    draw_arrays(i915->draw, prim, start, count);
 104
 105    /*
 106     * unmap vertex/index buffers
 107     */
 108    for (i = 0; i < i915->num_vertex_buffers; i++) {
 109       pipe_buffer_unmap(pipe->screen, i915->vertex_buffer[i].buffer);
 110       draw_set_mapped_vertex_buffer(draw, i, NULL);
 111    }
 112    if (indexBuffer) {
 113       pipe_buffer_unmap(pipe->screen, indexBuffer);
 114       draw_set_mapped_element_buffer_range(draw, 0, start, start + count - 1, NULL);
 115    }
 116
 117    return TRUE;
 118 }
 119
 120 static boolean
 121 i915_draw_elements( struct pipe_context *pipe,
 122                     struct pipe_buffer *indexBuffer,
 123                     unsigned indexSize,
 124                     unsigned prim, unsigned start, unsigned count)
 125 {
 126    return i915_draw_range_elements( pipe, indexBuffer,
 127                                         indexSize,
 128                                         0, 0xffffffff,
 129                                         prim, start, count );
 130 }
 131
 132 static boolean i915_draw_arrays( struct pipe_context *pipe,
 133                                  unsigned prim, unsigned start, unsigned count)
 134 {
 135    return i915_draw_elements(pipe, NULL, 0, prim, start, count);
 136 }
 137
 138
 139
 140 struct pipe_context *i915_create_context( struct pipe_screen *screen,
 141                                           struct pipe_winsys *pipe_winsys,
 142                                           struct i915_winsys *i915_winsys )
 143 {
 144    struct i915_context *i915;
 145
 146    i915 = CALLOC_STRUCT(i915_context);
 147    if (i915 == NULL)
 148       return NULL;
 149
 150    i915->winsys = i915_winsys;
 151    i915->pipe.winsys = pipe_winsys;
 152    i915->pipe.screen = screen;
 153
 154    i915->pipe.destroy = i915_destroy;
 155
 156    i915->pipe.clear = i915_clear;
 157
 158
 159    i915->pipe.draw_arrays = i915_draw_arrays;
 160    i915->pipe.draw_elements = i915_draw_elements;
 161    i915->pipe.draw_range_elements = i915_draw_range_elements;
 162
 163    /*
 164     * Create drawing context and plug our rendering stage into it.
 165     */
 166    i915->draw = draw_create();
 167    assert(i915->draw);
 168    if (!debug_get_bool_option("I915_NO_VBUF", FALSE)) {
 169       draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
 170    }
 171    else {
 172       draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
 173    }
 174
 175    i915_init_surface_functions(i915);
 176    i915_init_state_functions(i915);
 177    i915_init_flush_functions(i915);
 178    i915_init_texture_functions(i915);
 179
 180    draw_install_aaline_stage(i915->draw, &i915->pipe);
 181    draw_install_aapoint_stage(i915->draw, &i915->pipe);
 182
 183    i915->dirty = ~0;
 184    i915->hardware_dirty = ~0;
 185
 186    /* Batch stream debugging is a bit hacked up at the moment:
 187     */
 188    i915->batch = i915_winsys->batch_get(i915_winsys);
 189    i915->batch->winsys = i915_winsys;
 190
 191    return &i915->pipe;
 192 }
 193