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       mapped_indices += i915->index_buffer.offset;
  72    }
  73
  74    draw_set_mapped_element_buffer_range(draw, (mapped_indices) ?
  75                                         i915->index_buffer.index_size : 0,
  76                                         info->index_bias,
  77                                         info->min_index,
  78                                         info->max_index,
  79                                         mapped_indices);
  80
  81
  82    draw_set_mapped_constant_buffer(draw, PIPE_SHADER_VERTEX, 0,
  83                                    i915->current.constants[PIPE_SHADER_VERTEX],
  84                                    (i915->current.num_user_constants[PIPE_SHADER_VERTEX] *
  85                                       4 * sizeof(float)));
  86
  87    /*
  88     * Do the drawing
  89     */
  90    draw_arrays(i915->draw, info->mode, info->start, info->count);
  91
  92    /*
  93     * unmap vertex/index buffers
  94     */
  95    for (i = 0; i < i915->num_vertex_buffers; i++) {
  96       draw_set_mapped_vertex_buffer(draw, i, NULL);
  97    }
  98
  99    if (mapped_indices) {
 100       draw_set_mapped_element_buffer(draw, 0, 0, NULL);
 101    }
 102 }
 103
 104
 105 /*
 106  * Generic context functions
 107  */
 108
 109
 110 static void i915_destroy(struct pipe_context *pipe)
 111 {
 112    struct i915_context *i915 = i915_context(pipe);
 113    int i;
 114
 115    draw_destroy(i915->draw);
 116
 117    if(i915->batch)
 118       i915->iws->batchbuffer_destroy(i915->batch);
 119
 120    /* unbind framebuffer */
 121    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 122       pipe_surface_reference(&i915->framebuffer.cbufs[i], NULL);
 123    }
 124    pipe_surface_reference(&i915->framebuffer.zsbuf, NULL);
 125
 126    FREE(i915);
 127 }
 128
 129 struct pipe_context *
 130 i915_create_context(struct pipe_screen *screen, void *priv)
 131 {
 132    struct i915_context *i915;
 133
 134    i915 = CALLOC_STRUCT(i915_context);
 135    if (i915 == NULL)
 136       return NULL;
 137
 138    i915->iws = i915_screen(screen)->iws;
 139    i915->base.winsys = NULL;
 140    i915->base.screen = screen;
 141    i915->base.priv = priv;
 142
 143    i915->base.destroy = i915_destroy;
 144
 145    i915->base.clear = i915_clear;
 146
 147    i915->base.draw_vbo = i915_draw_vbo;
 148
 149    /*
 150     * Create drawing context and plug our rendering stage into it.
 151     */
 152    i915->draw = draw_create(&i915->base);
 153    assert(i915->draw);
 154    if (!debug_get_bool_option("I915_NO_VBUF", FALSE)) {
 155       draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
 156    } else {
 157       draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
 158    }
 159
 160    i915_init_surface_functions(i915);
 161    i915_init_state_functions(i915);
 162    i915_init_flush_functions(i915);
 163    i915_init_resource_functions(i915);
 164
 165    draw_install_aaline_stage(i915->draw, &i915->base);
 166    draw_install_aapoint_stage(i915->draw, &i915->base);
 167
 168    i915->dirty = ~0;
 169    i915->hardware_dirty = ~0;
 170
 171    /* Batch stream debugging is a bit hacked up at the moment:
 172     */
 173    i915->batch = i915->iws->batchbuffer_create(i915->iws);
 174
 175    return &i915->base;
 176 }