src/gallium/drivers/r300/r300_context.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #include "r300_context.h"
  24
  25 static boolean r300_draw_range_elements(struct pipe_context* pipe,
  26                                         struct pipe_buffer* indexBuffer,
  27                                         unsigned indexSize,
  28                                         unsigned minIndex,
  29                                         unsigned maxIndex,
  30                                         unsigned mode,
  31                                         unsigned start,
  32                                         unsigned count)
  33 {
  34     struct r300_context* r300 = r300_context(pipe);
  35     int i;
  36
  37     for (i = 0; i < r300->vertex_buffer_count; i++) {
  38         void* buf = pipe_buffer_map(pipe->screen,
  39                                     r300->vertex_buffers[i].buffer,
  40                                     PIPE_BUFFER_USAGE_CPU_READ);
  41         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
  42     }
  43
  44     if (indexBuffer) {
  45         void* indices = pipe_buffer_map(pipe->screen, indexBuffer,
  46                                         PIPE_BUFFER_USAGE_CPU_READ);
  47         draw_set_mapped_element_buffer_range(r300->draw, indexSize,
  48                                              minIndex, maxIndex, indices);
  49     } else {
  50         draw_set_mapped_element_buffer(r300->draw, 0, NULL);
  51     }
  52
  53     draw_set_mapped_constant_buffer(r300->draw,
  54             r300->shader_constants[PIPE_SHADER_VERTEX].constants,
  55             r300->shader_constants[PIPE_SHADER_VERTEX].user_count *
  56                 (sizeof(float) * 4));
  57
  58     draw_arrays(r300->draw, mode, start, count);
  59
  60     for (i = 0; i < r300->vertex_buffer_count; i++) {
  61         pipe_buffer_unmap(pipe->screen, r300->vertex_buffers[i].buffer);
  62         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
  63     }
  64
  65     if (indexBuffer) {
  66         pipe_buffer_unmap(pipe->screen, indexBuffer);
  67         draw_set_mapped_element_buffer_range(r300->draw, 0, start,
  68                                              start + count - 1, NULL);
  69     }
  70
  71     return TRUE;
  72 }
  73
  74 static boolean r300_draw_elements(struct pipe_context* pipe,
  75                                   struct pipe_buffer* indexBuffer,
  76                                   unsigned indexSize, unsigned mode,
  77                                   unsigned start, unsigned count)
  78 {
  79     return r300_draw_range_elements(pipe, indexBuffer, indexSize, 0, ~0,
  80                                     mode, start, count);
  81 }
  82
  83 static boolean r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
  84                                 unsigned start, unsigned count)
  85 {
  86     return r300_draw_elements(pipe, NULL, 0, mode, start, count);
  87 }
  88
  89 static void r300_destroy_context(struct pipe_context* context) {
  90     struct r300_context* r300 = r300_context(context);
  91
  92     draw_destroy(r300->draw);
  93
  94     FREE(r300->blend_color_state);
  95     FREE(r300->rs_block);
  96     FREE(r300->scissor_state);
  97     FREE(r300->viewport_state);
  98     FREE(r300);
  99 }
 100
 101 static unsigned int
 102 r300_is_texture_referenced( struct pipe_context *pipe,
 103                             struct pipe_texture *texture,
 104                             unsigned face, unsigned level)
 105 {
 106    /**
 107     * FIXME: Optimize.
 108     */
 109
 110    return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 111 }
 112
 113 static unsigned int
 114 r300_is_buffer_referenced( struct pipe_context *pipe,
 115                            struct pipe_buffer *buf)
 116 {
 117    /**
 118     * FIXME: Optimize.
 119     */
 120
 121    return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 122 }
 123
 124 struct pipe_context* r300_create_context(struct pipe_screen* screen,
 125                                          struct r300_winsys* r300_winsys)
 126 {
 127     struct r300_context* r300 = CALLOC_STRUCT(r300_context);
 128
 129     if (!r300)
 130         return NULL;
 131
 132     r300->winsys = r300_winsys;
 133
 134     r300->context.winsys = (struct pipe_winsys*)r300_winsys;
 135     r300->context.screen = r300_screen(screen);
 136
 137     r300->context.destroy = r300_destroy_context;
 138
 139     r300->context.clear = r300_clear;
 140
 141     r300->context.draw_arrays = r300_draw_arrays;
 142     r300->context.draw_elements = r300_draw_elements;
 143     r300->context.draw_range_elements = r300_draw_range_elements;
 144
 145     r300->context.is_texture_referenced = r300_is_texture_referenced;
 146     r300->context.is_buffer_referenced = r300_is_buffer_referenced;
 147
 148     /* Create a Draw. This is used for vert collation and SW TCL. */
 149     r300->draw = draw_create();
 150     /* Enable our renderer. */
 151     draw_set_rasterize_stage(r300->draw, r300_draw_stage(r300));
 152     /* Disable Draw's clipping if TCL is present. */
 153     draw_set_driver_clipping(r300->draw, r300_screen(screen)->caps->has_tcl);
 154     /* Force Draw to never do viewport transform, since (again) we can do
 155      * transform in hardware, always. */
 156     draw_set_viewport_state(r300->draw, &r300_viewport_identity);
 157
 158     r300->blend_color_state = CALLOC_STRUCT(r300_blend_color_state);
 159     r300->rs_block = CALLOC_STRUCT(r300_rs_block);
 160     r300->scissor_state = CALLOC_STRUCT(r300_scissor_state);
 161     r300->viewport_state = CALLOC_STRUCT(r300_viewport_state);
 162
 163     r300_init_flush_functions(r300);
 164
 165     r300_init_query_functions(r300);
 166
 167     r300_init_surface_functions(r300);
 168
 169     r300_init_state_functions(r300);
 170
 171     r300_emit_invariant_state(r300);
 172     r300->dirty_state = R300_NEW_KITCHEN_SINK;
 173     r300->dirty_hw++;
 174
 175     return &r300->context;
 176 }