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                          int indexBias,
  52                          unsigned min_index,
  53                          unsigned max_index,
  54                          unsigned prim, unsigned start, unsigned count)
  55 {
  56    struct i915_context *i915 = i915_context(pipe);
  57    struct draw_context *draw = i915->draw;
  58    unsigned i;
  59
  60    if (i915->dirty)
  61       i915_update_derived(i915);
  62
  63    /*
  64     * Map vertex buffers
  65     */
  66    for (i = 0; i < i915->num_vertex_buffers; i++) {
  67       void *buf = i915_buffer(i915->vertex_buffer[i].buffer)->data;
  68       draw_set_mapped_vertex_buffer(draw, i, buf);
  69    }
  70
  71    /*
  72     * Map index buffer, if present
  73     */
  74    if (indexBuffer) {
  75       void *mapped_indexes = i915_buffer(indexBuffer)->data;
  76       draw_set_mapped_element_buffer_range(draw, indexSize, indexBias,
  77                                            min_index,
  78                                            max_index,
  79                                            mapped_indexes);
  80    } else {
  81       draw_set_mapped_element_buffer(draw, 0, 0, NULL);
  82    }
  83
  84
  85    draw_set_mapped_constant_buffer(draw, PIPE_SHADER_VERTEX, 0,
  86                                    i915->current.constants[PIPE_SHADER_VERTEX],
  87                                    (i915->current.num_user_constants[PIPE_SHADER_VERTEX] *
  88                                       4 * sizeof(float)));
  89
  90    /*
  91     * Do the drawing
  92     */
  93    draw_arrays(i915->draw, prim, start, count);
  94
  95    /*
  96     * unmap vertex/index buffers
  97     */
  98    for (i = 0; i < i915->num_vertex_buffers; i++) {
  99       draw_set_mapped_vertex_buffer(draw, i, NULL);
 100    }
 101
 102    if (indexBuffer) {
 103       draw_set_mapped_element_buffer(draw, 0, 0, NULL);
 104    }
 105 }
 106
 107 static void
 108 i915_draw_elements(struct pipe_context *pipe,
 109                    struct pipe_resource *indexBuffer,
 110                    unsigned indexSize, int indexBias,
 111                    unsigned prim, unsigned start, unsigned count)
 112 {
 113    i915_draw_range_elements(pipe, indexBuffer,
 114                             indexSize, indexBias,
 115                             0, 0xffffffff,
 116                             prim, start, count);
 117 }
 118
 119 static void
 120 i915_draw_arrays(struct pipe_context *pipe,
 121                  unsigned prim, unsigned start, unsigned count)
 122 {
 123    i915_draw_elements(pipe, NULL, 0, 0, prim, start, count);
 124 }
 125
 126
 127
 128
 129 /*
 130  * Generic context functions
 131  */
 132
 133
 134 static void i915_destroy(struct pipe_context *pipe)
 135 {
 136    struct i915_context *i915 = i915_context(pipe);
 137    int i;
 138
 139    draw_destroy(i915->draw);
 140
 141    if(i915->batch)
 142       i915->iws->batchbuffer_destroy(i915->batch);
 143
 144    /* unbind framebuffer */
 145    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 146       pipe_surface_reference(&i915->framebuffer.cbufs[i], NULL);
 147    }
 148    pipe_surface_reference(&i915->framebuffer.zsbuf, NULL);
 149
 150    FREE(i915);
 151 }
 152
 153 struct pipe_context *
 154 i915_create_context(struct pipe_screen *screen, void *priv)
 155 {
 156    struct i915_context *i915;
 157
 158    i915 = CALLOC_STRUCT(i915_context);
 159    if (i915 == NULL)
 160       return NULL;
 161
 162    i915->iws = i915_screen(screen)->iws;
 163    i915->base.winsys = NULL;
 164    i915->base.screen = screen;
 165    i915->base.priv = priv;
 166
 167    i915->base.destroy = i915_destroy;
 168
 169    i915->base.clear = i915_clear;
 170
 171    i915->base.draw_arrays = i915_draw_arrays;
 172    i915->base.draw_elements = i915_draw_elements;
 173    i915->base.draw_range_elements = i915_draw_range_elements;
 174
 175    /*
 176     * Create drawing context and plug our rendering stage into it.
 177     */
 178    i915->draw = draw_create(&i915->base);
 179    assert(i915->draw);
 180    if (!debug_get_bool_option("I915_NO_VBUF", FALSE)) {
 181       draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
 182    } else {
 183       draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
 184    }
 185
 186    i915_init_surface_functions(i915);
 187    i915_init_state_functions(i915);
 188    i915_init_flush_functions(i915);
 189    i915_init_resource_functions(i915);
 190
 191    draw_install_aaline_stage(i915->draw, &i915->base);
 192    draw_install_aapoint_stage(i915->draw, &i915->base);
 193
 194    i915->dirty = ~0;
 195    i915->hardware_dirty = ~0;
 196
 197    /* Batch stream debugging is a bit hacked up at the moment:
 198     */
 199    i915->batch = i915->iws->batchbuffer_create(i915->iws);
 200
 201    return &i915->base;
 202 }