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
  33 #include "draw/draw_context.h"
  34 #include "pipe/p_defines.h"
  35 #include "pipe/p_inlines.h"
  36 #include "util/u_memory.h"
  37 #include "pipe/p_screen.h"
  38
  39
  40 /*
  41  * Draw functions
  42  */
  43
  44
  45 static void
  46 i915_draw_range_elements(struct pipe_context *pipe,
  47                          struct pipe_buffer *indexBuffer,
  48                          unsigned indexSize,
  49                          unsigned min_index,
  50                          unsigned max_index,
  51                          unsigned prim, unsigned start, unsigned count)
  52 {
  53    struct i915_context *i915 = i915_context(pipe);
  54    struct draw_context *draw = i915->draw;
  55    unsigned i;
  56
  57    if (i915->dirty)
  58       i915_update_derived(i915);
  59
  60    /*
  61     * Map vertex buffers
  62     */
  63    for (i = 0; i < i915->num_vertex_buffers; i++) {
  64       void *buf = pipe_buffer_map(pipe->screen, i915->vertex_buffer[i].buffer,
  65                                   PIPE_BUFFER_USAGE_CPU_READ);
  66       draw_set_mapped_vertex_buffer(draw, i, buf);
  67    }
  68
  69    /*
  70     * Map index buffer, if present
  71     */
  72    if (indexBuffer) {
  73       void *mapped_indexes = pipe_buffer_map(pipe->screen, indexBuffer,
  74                                              PIPE_BUFFER_USAGE_CPU_READ);
  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,
  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       pipe_buffer_unmap(pipe->screen, i915->vertex_buffer[i].buffer);
  99       draw_set_mapped_vertex_buffer(draw, i, NULL);
 100    }
 101
 102    if (indexBuffer) {
 103       pipe_buffer_unmap(pipe->screen, indexBuffer);
 104       draw_set_mapped_element_buffer_range(draw, 0, start, start + count - 1, NULL);
 105    }
 106 }
 107
 108 static void
 109 i915_draw_elements(struct pipe_context *pipe,
 110                    struct pipe_buffer *indexBuffer,
 111                    unsigned indexSize,
 112                    unsigned prim, unsigned start, unsigned count)
 113 {
 114    i915_draw_range_elements(pipe, indexBuffer,
 115                             indexSize,
 116                             0, 0xffffffff,
 117                             prim, start, count);
 118 }
 119
 120 static void
 121 i915_draw_arrays(struct pipe_context *pipe,
 122                  unsigned prim, unsigned start, unsigned count)
 123 {
 124    i915_draw_elements(pipe, NULL, 0, prim, start, count);
 125 }
 126
 127
 128 /*
 129  * Is referenced functions
 130  */
 131
 132
 133 static unsigned int
 134 i915_is_texture_referenced(struct pipe_context *pipe,
 135                            struct pipe_texture *texture,
 136                            unsigned face, unsigned level)
 137 {
 138    /**
 139     * FIXME: Return the corrent result. We can't alays return referenced
 140     *        since it causes a double flush within the vbo module.
 141     */
 142 #if 0
 143    return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 144 #else
 145    return 0;
 146 #endif
 147 }
 148
 149 static unsigned int
 150 i915_is_buffer_referenced(struct pipe_context *pipe,
 151                           struct pipe_buffer *buf)
 152 {
 153    /*
 154     * Since we never expose hardware buffers to the state tracker
 155     * they can never be referenced, so this isn't a lie
 156     */
 157    return 0;
 158 }
 159
 160
 161 /*
 162  * Generic context functions
 163  */
 164
 165
 166 static void i915_destroy(struct pipe_context *pipe)
 167 {
 168    struct i915_context *i915 = i915_context(pipe);
 169    int i;
 170
 171    draw_destroy(i915->draw);
 172
 173    if(i915->batch)
 174       i915->iws->batchbuffer_destroy(i915->batch);
 175
 176    /* unbind framebuffer */
 177    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 178       pipe_surface_reference(&i915->framebuffer.cbufs[i], NULL);
 179    }
 180    pipe_surface_reference(&i915->framebuffer.zsbuf, NULL);
 181
 182    FREE(i915);
 183 }
 184
 185 struct pipe_context *
 186 i915_create_context(struct pipe_screen *screen)
 187 {
 188    struct i915_context *i915;
 189
 190    i915 = CALLOC_STRUCT(i915_context);
 191    if (i915 == NULL)
 192       return NULL;
 193
 194    i915->iws = i915_screen(screen)->iws;
 195    i915->base.winsys = NULL;
 196    i915->base.screen = screen;
 197
 198    i915->base.destroy = i915_destroy;
 199
 200    i915->base.clear = i915_clear;
 201
 202    i915->base.draw_arrays = i915_draw_arrays;
 203    i915->base.draw_elements = i915_draw_elements;
 204    i915->base.draw_range_elements = i915_draw_range_elements;
 205
 206    i915->base.is_texture_referenced = i915_is_texture_referenced;
 207    i915->base.is_buffer_referenced = i915_is_buffer_referenced;
 208
 209    /*
 210     * Create drawing context and plug our rendering stage into it.
 211     */
 212    i915->draw = draw_create();
 213    assert(i915->draw);
 214    if (!debug_get_bool_option("I915_NO_VBUF", FALSE)) {
 215       draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
 216    } else {
 217       draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
 218    }
 219
 220    i915_init_surface_functions(i915);
 221    i915_init_state_functions(i915);
 222    i915_init_flush_functions(i915);
 223
 224    draw_install_aaline_stage(i915->draw, &i915->base);
 225    draw_install_aapoint_stage(i915->draw, &i915->base);
 226
 227    i915->dirty = ~0;
 228    i915->hardware_dirty = ~0;
 229
 230    /* Batch stream debugging is a bit hacked up at the moment:
 231     */
 232    i915->batch = i915->iws->batchbuffer_create(i915->iws);
 233
 234    return &i915->base;
 235 }