src/gallium/drivers/i915/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_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
  47 static void
  48 i915_draw_range_elements(struct pipe_context *pipe,
  49                          struct pipe_resource *indexBuffer,
  50                          unsigned indexSize,
  51                          unsigned min_index,
  52                          unsigned max_index,
  53                          unsigned prim, unsigned start, unsigned count)
  54 {
  55    struct i915_context *i915 = i915_context(pipe);
  56    struct draw_context *draw = i915->draw;
  57    unsigned i;
  58
  59    if (i915->dirty)
  60       i915_update_derived(i915);
  61
  62    /*
  63     * Map vertex buffers
  64     */
  65    for (i = 0; i < i915->num_vertex_buffers; i++) {
  66       void *buf = i915_buffer(i915->vertex_buffer[i].buffer)->data;
  67       draw_set_mapped_vertex_buffer(draw, i, buf);
  68    }
  69
  70    /*
  71     * Map index buffer, if present
  72     */
  73    if (indexBuffer) {
  74       void *mapped_indexes = i915_buffer(indexBuffer)->data;
  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       draw_set_mapped_vertex_buffer(draw, i, NULL);
  99    }
 100
 101    if (indexBuffer) {
 102       draw_set_mapped_element_buffer(draw, 0, NULL);
 103    }
 104 }
 105
 106 static void
 107 i915_draw_elements(struct pipe_context *pipe,
 108                    struct pipe_resource *indexBuffer,
 109                    unsigned indexSize,
 110                    unsigned prim, unsigned start, unsigned count)
 111 {
 112    i915_draw_range_elements(pipe, indexBuffer,
 113                             indexSize,
 114                             0, 0xffffffff,
 115                             prim, start, count);
 116 }
 117
 118 static void
 119 i915_draw_arrays(struct pipe_context *pipe,
 120                  unsigned prim, unsigned start, unsigned count)
 121 {
 122    i915_draw_elements(pipe, NULL, 0, prim, start, count);
 123 }
 124
 125
 126
 127
 128 /*
 129  * Generic context functions
 130  */
 131
 132
 133 static void i915_destroy(struct pipe_context *pipe)
 134 {
 135    struct i915_context *i915 = i915_context(pipe);
 136    int i;
 137
 138    draw_destroy(i915->draw);
 139
 140    if(i915->batch)
 141       i915->iws->batchbuffer_destroy(i915->batch);
 142
 143    /* unbind framebuffer */
 144    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 145       pipe_surface_reference(&i915->framebuffer.cbufs[i], NULL);
 146    }
 147    pipe_surface_reference(&i915->framebuffer.zsbuf, NULL);
 148
 149    FREE(i915);
 150 }
 151
 152 struct pipe_context *
 153 i915_create_context(struct pipe_screen *screen, void *priv)
 154 {
 155    struct i915_context *i915;
 156
 157    i915 = CALLOC_STRUCT(i915_context);
 158    if (i915 == NULL)
 159       return NULL;
 160
 161    i915->iws = i915_screen(screen)->iws;
 162    i915->base.winsys = NULL;
 163    i915->base.screen = screen;
 164    i915->base.priv = priv;
 165
 166    i915->base.destroy = i915_destroy;
 167
 168    i915->base.clear = i915_clear;
 169
 170    i915->base.draw_arrays = i915_draw_arrays;
 171    i915->base.draw_elements = i915_draw_elements;
 172    i915->base.draw_range_elements = i915_draw_range_elements;
 173
 174    /*
 175     * Create drawing context and plug our rendering stage into it.
 176     */
 177    i915->draw = draw_create();
 178    assert(i915->draw);
 179    if (!debug_get_bool_option("I915_NO_VBUF", FALSE)) {
 180       draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
 181    } else {
 182       draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
 183    }
 184
 185    i915_init_surface_functions(i915);
 186    i915_init_state_functions(i915);
 187    i915_init_flush_functions(i915);
 188    i915_init_resource_functions(i915);
 189
 190    draw_install_aaline_stage(i915->draw, &i915->base);
 191    draw_install_aapoint_stage(i915->draw, &i915->base);
 192
 193    i915->dirty = ~0;
 194    i915->hardware_dirty = ~0;
 195
 196    /* Batch stream debugging is a bit hacked up at the moment:
 197     */
 198    i915->batch = i915->iws->batchbuffer_create(i915->iws);
 199
 200    return &i915->base;
 201 }