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_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
  49 {
  50    struct i915_context *i915 = i915_context(pipe);
  51    struct draw_context *draw = i915->draw;
  52    void *mapped_indices = NULL;
  53    unsigned i;
  54
  55    if (i915->dirty)
  56       i915_update_derived(i915);
  57
  58    /*
  59     * Map vertex buffers
  60     */
  61    for (i = 0; i < i915->num_vertex_buffers; i++) {
  62       void *buf = i915_buffer(i915->vertex_buffer[i].buffer)->data;
  63       draw_set_mapped_vertex_buffer(draw, i, buf);
  64    }
  65
  66    /*
  67     * Map index buffer, if present
  68     */
  69    if (info->indexed && i915->index_buffer.buffer)
  70       mapped_indices = i915_buffer(i915->index_buffer.buffer)->data;
  71    draw_set_mapped_index_buffer(draw, mapped_indices);
  72
  73    draw_set_mapped_constant_buffer(draw, PIPE_SHADER_VERTEX, 0,
  74                                    i915->current.constants[PIPE_SHADER_VERTEX],
  75                                    (i915->current.num_user_constants[PIPE_SHADER_VERTEX] *
  76                                       4 * sizeof(float)));
  77
  78    /*
  79     * Do the drawing
  80     */
  81    draw_vbo(i915->draw, info);
  82
  83    /*
  84     * unmap vertex/index buffers
  85     */
  86    for (i = 0; i < i915->num_vertex_buffers; i++) {
  87       draw_set_mapped_vertex_buffer(draw, i, NULL);
  88    }
  89
  90    if (mapped_indices)
  91       draw_set_mapped_index_buffer(draw, NULL);
  92 }
  93
  94
  95 /*
  96  * Generic context functions
  97  */
  98
  99
 100 static void i915_destroy(struct pipe_context *pipe)
 101 {
 102    struct i915_context *i915 = i915_context(pipe);
 103    int i;
 104
 105    draw_destroy(i915->draw);
 106
 107    if(i915->batch)
 108       i915->iws->batchbuffer_destroy(i915->batch);
 109
 110    for (i = 0; i < i915->num_vertex_buffers; i++) {
 111       pipe_resource_reference(&i915->vertex_buffer[i].buffer, NULL);
 112    }
 113
 114    /* unbind framebuffer */
 115    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 116       pipe_surface_reference(&i915->framebuffer.cbufs[i], NULL);
 117    }
 118    pipe_surface_reference(&i915->framebuffer.zsbuf, NULL);
 119
 120    FREE(i915);
 121 }
 122
 123 struct pipe_context *
 124 i915_create_context(struct pipe_screen *screen, void *priv)
 125 {
 126    struct i915_context *i915;
 127
 128    i915 = CALLOC_STRUCT(i915_context);
 129    if (i915 == NULL)
 130       return NULL;
 131
 132    i915->iws = i915_screen(screen)->iws;
 133    i915->base.winsys = NULL;
 134    i915->base.screen = screen;
 135    i915->base.priv = priv;
 136
 137    i915->base.destroy = i915_destroy;
 138
 139    i915->base.clear = i915_clear;
 140
 141    i915->base.draw_vbo = i915_draw_vbo;
 142
 143    /*
 144     * Create drawing context and plug our rendering stage into it.
 145     */
 146    i915->draw = draw_create(&i915->base);
 147    assert(i915->draw);
 148    if (!debug_get_bool_option("I915_NO_VBUF", FALSE)) {
 149       draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
 150    } else {
 151       draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
 152    }
 153
 154    i915_init_surface_functions(i915);
 155    i915_init_state_functions(i915);
 156    i915_init_flush_functions(i915);
 157    i915_init_resource_functions(i915);
 158
 159    draw_install_aaline_stage(i915->draw, &i915->base);
 160    draw_install_aapoint_stage(i915->draw, &i915->base);
 161
 162    i915->dirty = ~0;
 163    i915->hardware_dirty = ~0;
 164
 165    /* Batch stream debugging is a bit hacked up at the moment:
 166     */
 167    i915->batch = i915->iws->batchbuffer_create(i915->iws);
 168
 169    return &i915->base;
 170 }