src/gallium/drivers/i915simple/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_winsys.h"
  30 #include "i915_state.h"
  31 #include "i915_batch.h"
  32 #include "i915_texture.h"
  33 #include "i915_reg.h"
  34
  35 #include "draw/draw_context.h"
  36 #include "pipe/p_defines.h"
  37 #include "pipe/p_winsys.h"
  38 #include "pipe/p_util.h"
  39
  40
  41 /**
  42  * Query format support for creating a texture, drawing surface, etc.
  43  * \param format  the format to test
  44  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
  45  */
  46 static boolean
  47 i915_is_format_supported( struct pipe_context *pipe,
  48                           enum pipe_format format, uint type )
  49 {
  50    static const enum pipe_format tex_supported[] = {
  51       PIPE_FORMAT_R8G8B8A8_UNORM,
  52       PIPE_FORMAT_A8R8G8B8_UNORM,
  53       PIPE_FORMAT_R5G6B5_UNORM,
  54       PIPE_FORMAT_U_L8,
  55       PIPE_FORMAT_U_A8,
  56       PIPE_FORMAT_U_I8,
  57       PIPE_FORMAT_U_A8_L8,
  58       PIPE_FORMAT_YCBCR,
  59       PIPE_FORMAT_YCBCR_REV,
  60       PIPE_FORMAT_S8Z24_UNORM,
  61       PIPE_FORMAT_NONE  /* list terminator */
  62    };
  63    static const enum pipe_format surface_supported[] = {
  64       PIPE_FORMAT_A8R8G8B8_UNORM,
  65       PIPE_FORMAT_R5G6B5_UNORM,
  66       PIPE_FORMAT_S8Z24_UNORM,
  67       /*PIPE_FORMAT_R16G16B16A16_SNORM,*/
  68       PIPE_FORMAT_NONE  /* list terminator */
  69    };
  70    const enum pipe_format *list;
  71    uint i;
  72
  73    switch (type) {
  74    case PIPE_TEXTURE:
  75       list = tex_supported;
  76       break;
  77    case PIPE_SURFACE:
  78       list = surface_supported;
  79       break;
  80    default:
  81       assert(0);
  82    }
  83
  84    for (i = 0; list[i] != PIPE_FORMAT_NONE; i++) {
  85       if (list[i] == format)
  86          return TRUE;
  87    }
  88
  89    return FALSE;
  90 }
  91
  92
  93 static int
  94 i915_get_param(struct pipe_context *pipe, int param)
  95 {
  96    switch (param) {
  97    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  98       return 8;
  99    case PIPE_CAP_NPOT_TEXTURES:
 100       return 1;
 101    case PIPE_CAP_TWO_SIDED_STENCIL:
 102       return 1;
 103    case PIPE_CAP_GLSL:
 104       return 0;
 105    case PIPE_CAP_S3TC:
 106       return 0;
 107    case PIPE_CAP_ANISOTROPIC_FILTER:
 108       return 0;
 109    case PIPE_CAP_POINT_SPRITE:
 110       return 0;
 111    case PIPE_CAP_MAX_RENDER_TARGETS:
 112       return 1;
 113    case PIPE_CAP_OCCLUSION_QUERY:
 114       return 0;
 115    case PIPE_CAP_TEXTURE_SHADOW_MAP:
 116       return 1;
 117    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 118       return 11; /* max 1024x1024 */
 119    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 120       return 8;  /* max 128x128x128 */
 121    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 122       return 11; /* max 1024x1024 */
 123    default:
 124       return 0;
 125    }
 126 }
 127
 128
 129 static float
 130 i915_get_paramf(struct pipe_context *pipe, int param)
 131 {
 132    switch (param) {
 133    case PIPE_CAP_MAX_LINE_WIDTH:
 134       /* fall-through */
 135    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 136       return 7.5;
 137
 138    case PIPE_CAP_MAX_POINT_WIDTH:
 139       /* fall-through */
 140    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 141       return 255.0;
 142
 143    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 144       return 4.0;
 145
 146    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 147       return 16.0;
 148
 149    default:
 150       return 0;
 151    }
 152 }
 153
 154
 155 static void i915_destroy( struct pipe_context *pipe )
 156 {
 157    struct i915_context *i915 = i915_context( pipe );
 158
 159    draw_destroy( i915->draw );
 160
 161    FREE( i915 );
 162 }
 163
 164
 165
 166
 167 static boolean
 168 i915_draw_elements( struct pipe_context *pipe,
 169                     struct pipe_buffer *indexBuffer,
 170                     unsigned indexSize,
 171                     unsigned prim, unsigned start, unsigned count)
 172 {
 173    struct i915_context *i915 = i915_context( pipe );
 174    struct draw_context *draw = i915->draw;
 175    unsigned i;
 176
 177    if (i915->dirty)
 178       i915_update_derived( i915 );
 179
 180    /*
 181     * Map vertex buffers
 182     */
 183    for (i = 0; i < PIPE_ATTRIB_MAX; i++) {
 184       if (i915->vertex_buffer[i].buffer) {
 185          void *buf
 186             = pipe->winsys->buffer_map(pipe->winsys,
 187                                        i915->vertex_buffer[i].buffer,
 188                                        PIPE_BUFFER_USAGE_CPU_READ);
 189          draw_set_mapped_vertex_buffer(draw, i, buf);
 190       }
 191    }
 192    /* Map index buffer, if present */
 193    if (indexBuffer) {
 194       void *mapped_indexes
 195          = pipe->winsys->buffer_map(pipe->winsys, indexBuffer,
 196                                     PIPE_BUFFER_USAGE_CPU_READ);
 197       draw_set_mapped_element_buffer(draw, indexSize, mapped_indexes);
 198    }
 199    else {
 200       /* no index/element buffer */
 201       draw_set_mapped_element_buffer(draw, 0, NULL);
 202    }
 203
 204
 205    draw_set_mapped_constant_buffer(draw,
 206                                 i915->current.constants[PIPE_SHADER_VERTEX]);
 207
 208    /* draw! */
 209    draw_arrays(i915->draw, prim, start, count);
 210
 211    /*
 212     * unmap vertex/index buffers
 213     */
 214    for (i = 0; i < PIPE_ATTRIB_MAX; i++) {
 215       if (i915->vertex_buffer[i].buffer) {
 216          pipe->winsys->buffer_unmap(pipe->winsys, i915->vertex_buffer[i].buffer);
 217          draw_set_mapped_vertex_buffer(draw, i, NULL);
 218       }
 219    }
 220    if (indexBuffer) {
 221       pipe->winsys->buffer_unmap(pipe->winsys, indexBuffer);
 222       draw_set_mapped_element_buffer(draw, 0, NULL);
 223    }
 224
 225    return TRUE;
 226 }
 227
 228
 229 static boolean i915_draw_arrays( struct pipe_context *pipe,
 230                                  unsigned prim, unsigned start, unsigned count)
 231 {
 232    return i915_draw_elements(pipe, NULL, 0, prim, start, count);
 233 }
 234
 235
 236
 237 struct pipe_context *i915_create( struct pipe_winsys *pipe_winsys,
 238                                   struct i915_winsys *i915_winsys,
 239                                   unsigned pci_id )
 240 {
 241    struct i915_context *i915;
 242    unsigned is_i945 = 0;
 243
 244    switch (pci_id) {
 245    case PCI_CHIP_I915_G:
 246    case PCI_CHIP_I915_GM:
 247       break;
 248
 249    case PCI_CHIP_I945_G:
 250    case PCI_CHIP_I945_GM:
 251    case PCI_CHIP_I945_GME:
 252    case PCI_CHIP_G33_G:
 253    case PCI_CHIP_Q33_G:
 254    case PCI_CHIP_Q35_G:
 255       is_i945 = 1;
 256       break;
 257
 258    default:
 259       pipe_winsys->printf(pipe_winsys,
 260                           "%s: unknown pci id 0x%x, cannot create context\n",
 261                           __FUNCTION__, pci_id);
 262       return NULL;
 263    }
 264
 265    i915 = CALLOC_STRUCT(i915_context);
 266    if (i915 == NULL)
 267       return NULL;
 268
 269    i915->winsys = i915_winsys;
 270    i915->pipe.winsys = pipe_winsys;
 271
 272    i915->pipe.destroy = i915_destroy;
 273    i915->pipe.is_format_supported = i915_is_format_supported;
 274    i915->pipe.get_param = i915_get_param;
 275    i915->pipe.get_paramf = i915_get_paramf;
 276
 277    i915->pipe.clear = i915_clear;
 278
 279
 280    i915->pipe.draw_arrays = i915_draw_arrays;
 281    i915->pipe.draw_elements = i915_draw_elements;
 282
 283    /*
 284     * Create drawing context and plug our rendering stage into it.
 285     */
 286    i915->draw = draw_create();
 287    assert(i915->draw);
 288    if (GETENV("I915_VBUF")) {
 289       draw_set_rasterize_stage(i915->draw, i915_draw_vbuf_stage(i915));
 290    }
 291    else {
 292       draw_set_rasterize_stage(i915->draw, i915_draw_render_stage(i915));
 293    }
 294
 295    i915_init_surface_functions(i915);
 296    i915_init_state_functions(i915);
 297    i915_init_flush_functions(i915);
 298    i915_init_string_functions(i915);
 299    i915_init_texture_functions(i915);
 300
 301    i915->pci_id = pci_id;
 302    i915->flags.is_i945 = is_i945;
 303
 304
 305    i915->dirty = ~0;
 306    i915->hardware_dirty = ~0;
 307
 308    /* Batch stream debugging is a bit hacked up at the moment:
 309     */
 310    i915->batch_start = NULL;
 311
 312    /*
 313     * XXX we could plug GL selection/feedback into the drawing pipeline
 314     * by specifying a different setup/render stage.
 315     */
 316
 317    return &i915->pipe;
 318 }
 319