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     if (r300->dirty_state) {
  38         r300_emit_dirty_state(r300);
  39     }
  40
  41     for (i = 0; i < r300->vertex_buffer_count; i++) {
  42         void* buf = pipe_buffer_map(pipe->screen,
  43                                     r300->vertex_buffers[i].buffer,
  44                                     PIPE_BUFFER_USAGE_CPU_READ);
  45         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
  46     }
  47
  48     if (indexBuffer) {
  49         void* indices = pipe_buffer_map(pipe->screen, indexBuffer,
  50                                         PIPE_BUFFER_USAGE_CPU_READ);
  51         draw_set_mapped_element_buffer_range(r300->draw, indexSize,
  52                                              minIndex, maxIndex, indices);
  53     } else {
  54         draw_set_mapped_element_buffer(r300->draw, 0, NULL);
  55     }
  56
  57     draw_set_mapped_constant_buffer(r300->draw,
  58             r300->shader_constants[PIPE_SHADER_VERTEX].constants,
  59             r300->shader_constants[PIPE_SHADER_VERTEX].user_count *
  60                 (sizeof(float) * 4));
  61
  62     /* Abandon all hope, ye who enter here. */
  63     draw_arrays(r300->draw, mode, start, count);
  64
  65     for (i = 0; i < r300->vertex_buffer_count; i++) {
  66         pipe_buffer_unmap(pipe->screen, r300->vertex_buffers[i].buffer);
  67         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
  68     }
  69
  70     if (indexBuffer) {
  71         pipe_buffer_unmap(pipe->screen, indexBuffer);
  72         draw_set_mapped_element_buffer_range(r300->draw, 0, start,
  73                                              start + count - 1, NULL);
  74     }
  75
  76     return TRUE;
  77 }
  78
  79 static boolean r300_draw_elements(struct pipe_context* pipe,
  80                                   struct pipe_buffer* indexBuffer,
  81                                   unsigned indexSize, unsigned mode,
  82                                   unsigned start, unsigned count)
  83 {
  84     return r300_draw_range_elements(pipe, indexBuffer, indexSize, 0, ~0,
  85                                     mode, start, count);
  86 }
  87
  88 static boolean r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
  89                                 unsigned start, unsigned count)
  90 {
  91     return r300_draw_elements(pipe, NULL, 0, mode, start, count);
  92 }
  93
  94 static void r300_destroy_context(struct pipe_context* context) {
  95     struct r300_context* r300 = r300_context(context);
  96
  97     draw_destroy(r300->draw);
  98
  99     FREE(r300->blend_color_state);
 100     FREE(r300->rs_block);
 101     FREE(r300->scissor_state);
 102     FREE(r300);
 103 }
 104
 105 struct pipe_context* r300_create_context(struct pipe_screen* screen,
 106                                          struct r300_winsys* r300_winsys)
 107 {
 108     struct r300_context* r300 = CALLOC_STRUCT(r300_context);
 109
 110     if (!r300)
 111         return NULL;
 112
 113     /* XXX this could be refactored now? */
 114     r300->winsys = r300_winsys;
 115
 116     r300->context.winsys = (struct pipe_winsys*)r300_winsys;
 117     r300->context.screen = r300_screen(screen);
 118
 119     r300->context.destroy = r300_destroy_context;
 120
 121     r300->context.clear = r300_clear;
 122
 123     r300->context.draw_arrays = r300_draw_arrays;
 124     r300->context.draw_elements = r300_draw_elements;
 125     r300->context.draw_range_elements = r300_draw_range_elements;
 126
 127     r300->draw = draw_create();
 128     draw_set_rasterize_stage(r300->draw, r300_draw_swtcl_stage(r300));
 129
 130     r300->blend_color_state = CALLOC_STRUCT(r300_blend_color_state);
 131     r300->rs_block = CALLOC_STRUCT(r300_rs_block);
 132     r300->scissor_state = CALLOC_STRUCT(r300_scissor_state);
 133
 134     r300_init_flush_functions(r300);
 135
 136     r300_init_surface_functions(r300);
 137
 138     r300_init_state_functions(r300);
 139
 140     r300->dirty_state = R300_NEW_KITCHEN_SINK;
 141     r300->dirty_hw++;
 142
 143     return &r300->context;
 144 }