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    unsigned cbuf_dirty;
  55
  56
  57    /*
  58     * Ack vs contants here, helps ipers a lot.
  59     */
  60    cbuf_dirty = i915->dirty & I915_NEW_VS_CONSTANTS;
  61    i915->dirty &= ~I915_NEW_VS_CONSTANTS;
  62
  63    if (i915->dirty)
  64       i915_update_derived(i915);
  65
  66    /*
  67     * Map vertex buffers
  68     */
  69    for (i = 0; i < i915->num_vertex_buffers; i++) {
  70       void *buf = i915_buffer(i915->vertex_buffer[i].buffer)->data;
  71       draw_set_mapped_vertex_buffer(draw, i, buf);
  72    }
  73
  74    /*
  75     * Map index buffer, if present
  76     */
  77    if (info->indexed && i915->index_buffer.buffer)
  78       mapped_indices = i915_buffer(i915->index_buffer.buffer)->data;
  79    draw_set_mapped_index_buffer(draw, mapped_indices);
  80
  81    if (cbuf_dirty) {
  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    /*
  89     * Do the drawing
  90     */
  91    draw_vbo(i915->draw, info);
  92
  93    /*
  94     * unmap vertex/index buffers
  95     */
  96    for (i = 0; i < i915->num_vertex_buffers; i++) {
  97       draw_set_mapped_vertex_buffer(draw, i, NULL);
  98    }
  99
 100    if (mapped_indices)
 101       draw_set_mapped_index_buffer(draw, NULL);
 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    for (i = 0; i < i915->num_vertex_buffers; i++) {
 121       pipe_resource_reference(&i915->vertex_buffer[i].buffer, NULL);
 122    }
 123
 124    /* unbind framebuffer */
 125    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 126       pipe_surface_reference(&i915->framebuffer.cbufs[i], NULL);
 127    }
 128    pipe_surface_reference(&i915->framebuffer.zsbuf, NULL);
 129
 130    FREE(i915);
 131 }
 132
 133 struct pipe_context *
 134 i915_create_context(struct pipe_screen *screen, void *priv)
 135 {
 136    struct i915_context *i915;
 137
 138    i915 = CALLOC_STRUCT(i915_context);
 139    if (i915 == NULL)
 140       return NULL;
 141
 142    i915->iws = i915_screen(screen)->iws;
 143    i915->base.winsys = NULL;
 144    i915->base.screen = screen;
 145    i915->base.priv = priv;
 146
 147    i915->base.destroy = i915_destroy;
 148
 149    i915->base.clear = i915_clear;
 150
 151    i915->base.draw_vbo = i915_draw_vbo;
 152
 153    /* init this before draw */
 154    util_slab_create(&i915->transfer_pool, sizeof(struct pipe_transfer),
 155                     16, UTIL_SLAB_SINGLETHREADED);
 156
 157    /*
 158     * Create drawing context and plug our rendering stage into it.
 159     */
 160    i915->draw = draw_create(&i915->base);
 161    assert(i915->draw);
 162    if (!debug_get_bool_option("I915_NO_VBUF", FALSE)) {
 163       draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
 164    } else {
 165       draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
 166    }
 167
 168    i915_init_surface_functions(i915);
 169    i915_init_state_functions(i915);
 170    i915_init_flush_functions(i915);
 171    i915_init_resource_functions(i915);
 172
 173    draw_install_aaline_stage(i915->draw, &i915->base);
 174    draw_install_aapoint_stage(i915->draw, &i915->base);
 175
 176    i915->dirty = ~0;
 177    i915->hardware_dirty = ~0;
 178
 179    /* Batch stream debugging is a bit hacked up at the moment:
 180     */
 181    i915->batch = i915->iws->batchbuffer_create(i915->iws);
 182
 183    return &i915->base;
 184 }