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