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_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/internal/p_winsys_screen.h"
  38 #include "pipe/p_inlines.h"
  39 #include "util/u_memory.h"
  40 #include "pipe/p_screen.h"
  41
  42
  43 /*
  44  * Draw functions
  45  */
  46
  47
  48 static void
  49 i915_draw_range_elements(struct pipe_context *pipe,
  50                          struct pipe_buffer *indexBuffer,
  51                          unsigned indexSize,
  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 = pipe_buffer_map(pipe->screen, i915->vertex_buffer[i].buffer,
  68                                   PIPE_BUFFER_USAGE_CPU_READ);
  69       draw_set_mapped_vertex_buffer(draw, i, buf);
  70    }
  71
  72    /*
  73     * Map index buffer, if present
  74     */
  75    if (indexBuffer) {
  76       void *mapped_indexes = pipe_buffer_map(pipe->screen, indexBuffer,
  77                                              PIPE_BUFFER_USAGE_CPU_READ);
  78       draw_set_mapped_element_buffer_range(draw, indexSize,
  79                                            min_index,
  80                                            max_index,
  81                                            mapped_indexes);
  82    } else {
  83       draw_set_mapped_element_buffer(draw, 0, NULL);
  84    }
  85
  86
  87    draw_set_mapped_constant_buffer(draw, PIPE_SHADER_VERTEX,
  88                                    i915->current.constants[PIPE_SHADER_VERTEX],
  89                                    (i915->current.num_user_constants[PIPE_SHADER_VERTEX] *
  90                                       4 * sizeof(float)));
  91
  92    /*
  93     * Do the drawing
  94     */
  95    draw_arrays(i915->draw, prim, start, count);
  96
  97    /*
  98     * unmap vertex/index buffers
  99     */
 100    for (i = 0; i < i915->num_vertex_buffers; i++) {
 101       pipe_buffer_unmap(pipe->screen, i915->vertex_buffer[i].buffer);
 102       draw_set_mapped_vertex_buffer(draw, i, NULL);
 103    }
 104
 105    if (indexBuffer) {
 106       pipe_buffer_unmap(pipe->screen, indexBuffer);
 107       draw_set_mapped_element_buffer_range(draw, 0, start, start + count - 1, NULL);
 108    }
 109 }
 110
 111 static void
 112 i915_draw_elements(struct pipe_context *pipe,
 113                    struct pipe_buffer *indexBuffer,
 114                    unsigned indexSize,
 115                    unsigned prim, unsigned start, unsigned count)
 116 {
 117    i915_draw_range_elements(pipe, indexBuffer,
 118                             indexSize,
 119                             0, 0xffffffff,
 120                             prim, start, count);
 121 }
 122
 123 static void
 124 i915_draw_arrays(struct pipe_context *pipe,
 125                  unsigned prim, unsigned start, unsigned count)
 126 {
 127    i915_draw_elements(pipe, NULL, 0, prim, start, count);
 128 }
 129
 130
 131 /*
 132  * Is referenced functions
 133  */
 134
 135
 136 static unsigned int
 137 i915_is_texture_referenced(struct pipe_context *pipe,
 138                            struct pipe_texture *texture,
 139                            unsigned face, unsigned level)
 140 {
 141    /**
 142     * FIXME: Return the corrent result. We can't alays return referenced
 143     *        since it causes a double flush within the vbo module.
 144     */
 145 #if 0
 146    return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 147 #else
 148    return 0;
 149 #endif
 150 }
 151
 152 static unsigned int
 153 i915_is_buffer_referenced(struct pipe_context *pipe,
 154                           struct pipe_buffer *buf)
 155 {
 156    /*
 157     * Since we never expose hardware buffers to the state tracker
 158     * they can never be referenced, so this isn't a lie
 159     */
 160    return 0;
 161 }
 162
 163
 164 /*
 165  * Generic context functions
 166  */
 167
 168
 169 static void i915_destroy(struct pipe_context *pipe)
 170 {
 171    struct i915_context *i915 = i915_context(pipe);
 172    int i;
 173
 174    draw_destroy(i915->draw);
 175
 176    if(i915->batch)
 177       i915->iws->batchbuffer_destroy(i915->batch);
 178
 179    /* unbind framebuffer */
 180    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 181       pipe_surface_reference(&i915->framebuffer.cbufs[i], NULL);
 182    }
 183    pipe_surface_reference(&i915->framebuffer.zsbuf, NULL);
 184
 185    FREE(i915);
 186 }
 187
 188 struct pipe_context *
 189 i915_create_context(struct pipe_screen *screen)
 190 {
 191    struct i915_context *i915;
 192
 193    i915 = CALLOC_STRUCT(i915_context);
 194    if (i915 == NULL)
 195       return NULL;
 196
 197    i915->iws = i915_screen(screen)->iws;
 198    i915->base.winsys = NULL;
 199    i915->base.screen = screen;
 200
 201    i915->base.destroy = i915_destroy;
 202
 203    i915->base.clear = i915_clear;
 204
 205    i915->base.draw_arrays = i915_draw_arrays;
 206    i915->base.draw_elements = i915_draw_elements;
 207    i915->base.draw_range_elements = i915_draw_range_elements;
 208
 209    i915->base.is_texture_referenced = i915_is_texture_referenced;
 210    i915->base.is_buffer_referenced = i915_is_buffer_referenced;
 211
 212    /*
 213     * Create drawing context and plug our rendering stage into it.
 214     */
 215    i915->draw = draw_create();
 216    assert(i915->draw);
 217    if (!debug_get_bool_option("I915_NO_VBUF", FALSE)) {
 218       draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
 219    } else {
 220       draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
 221    }
 222
 223    i915_init_surface_functions(i915);
 224    i915_init_state_functions(i915);
 225    i915_init_flush_functions(i915);
 226
 227    draw_install_aaline_stage(i915->draw, &i915->base);
 228    draw_install_aapoint_stage(i915->draw, &i915->base);
 229
 230    i915->dirty = ~0;
 231    i915->hardware_dirty = ~0;
 232
 233    /* Batch stream debugging is a bit hacked up at the moment:
 234     */
 235    i915->batch = i915->iws->batchbuffer_create(i915->iws);
 236
 237    return &i915->base;
 238 }