src/mesa/drivers/dri/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 "main/imports.h"
  30 #include "main/macros.h"
  31 #include "intel_tris.h"
  32 #include "tnl/t_context.h"
  33 #include "tnl/t_pipeline.h"
  34 #include "tnl/t_vertex.h"
  35
  36 #include "swrast/swrast.h"
  37 #include "swrast_setup/swrast_setup.h"
  38 #include "tnl/tnl.h"
  39 #include "../glsl/ralloc.h"
  40
  41 #include "i915_reg.h"
  42 #include "i915_program.h"
  43
  44 #include "intel_span.h"
  45
  46 /***************************************
  47  * Mesa's Driver Functions
  48  ***************************************/
  49
  50 /* Override intel default.
  51  */
  52 static void
  53 i915InvalidateState(struct gl_context * ctx, GLuint new_state)
  54 {
  55    _swrast_InvalidateState(ctx, new_state);
  56    _swsetup_InvalidateState(ctx, new_state);
  57    _vbo_InvalidateState(ctx, new_state);
  58    _tnl_InvalidateState(ctx, new_state);
  59    _tnl_invalidate_vertex_state(ctx, new_state);
  60    intel_context(ctx)->NewGLState |= new_state;
  61
  62    /* Todo: gather state values under which tracked parameters become
  63     * invalidated, add callbacks for things like
  64     * ProgramLocalParameters, etc.
  65     */
  66    {
  67       struct i915_fragment_program *p =
  68          (struct i915_fragment_program *) ctx->FragmentProgram._Current;
  69       if (p && p->nr_params)
  70          p->params_uptodate = 0;
  71    }
  72
  73    if (new_state & (_NEW_STENCIL | _NEW_BUFFERS | _NEW_POLYGON))
  74       i915_update_stencil(ctx);
  75    if (new_state & (_NEW_LIGHT))
  76        i915_update_provoking_vertex(ctx);
  77    if (new_state & (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS))
  78        i915_update_program(ctx);
  79    if (new_state & (_NEW_PROGRAM | _NEW_POINT))
  80        i915_update_sprite_point_enable(ctx);
  81 }
  82
  83
  84 static void
  85 i915InitDriverFunctions(struct dd_function_table *functions)
  86 {
  87    intelInitDriverFunctions(functions);
  88    i915InitStateFunctions(functions);
  89    i915InitFragProgFuncs(functions);
  90    functions->UpdateState = i915InvalidateState;
  91 }
  92
  93 /* Note: this is shared with i830. */
  94 void
  95 intel_init_texture_formats(struct gl_context *ctx)
  96 {
  97    struct intel_context *intel = intel_context(ctx);
  98    struct intel_screen *intel_screen = intel->intelScreen;
  99
 100    ctx->TextureFormatSupported[MESA_FORMAT_ARGB8888] = true;
 101    if (intel_screen->deviceID != PCI_CHIP_I830_M &&
 102        intel_screen->deviceID != PCI_CHIP_845_G)
 103       ctx->TextureFormatSupported[MESA_FORMAT_XRGB8888] = true;
 104    ctx->TextureFormatSupported[MESA_FORMAT_ARGB4444] = true;
 105    ctx->TextureFormatSupported[MESA_FORMAT_ARGB1555] = true;
 106    ctx->TextureFormatSupported[MESA_FORMAT_RGB565] = true;
 107    ctx->TextureFormatSupported[MESA_FORMAT_L8] = true;
 108    ctx->TextureFormatSupported[MESA_FORMAT_A8] = true;
 109    ctx->TextureFormatSupported[MESA_FORMAT_I8] = true;
 110    ctx->TextureFormatSupported[MESA_FORMAT_AL88] = true;
 111
 112    /* Depth and stencil */
 113    ctx->TextureFormatSupported[MESA_FORMAT_S8_Z24] = true;
 114    ctx->TextureFormatSupported[MESA_FORMAT_X8_Z24] = true;
 115    ctx->TextureFormatSupported[MESA_FORMAT_S8] = intel->has_separate_stencil;
 116
 117    /*
 118     * This was disabled in initial FBO enabling to avoid combinations
 119     * of depth+stencil that wouldn't work together.  We since decided
 120     * that it was OK, since it's up to the app to come up with the
 121     * combo that actually works, so this can probably be re-enabled.
 122     */
 123    /*
 124    ctx->TextureFormatSupported[MESA_FORMAT_Z16] = true;
 125    ctx->TextureFormatSupported[MESA_FORMAT_Z24] = true;
 126    */
 127
 128    /* ctx->Extensions.MESA_ycbcr_texture */
 129    ctx->TextureFormatSupported[MESA_FORMAT_YCBCR] = true;
 130    ctx->TextureFormatSupported[MESA_FORMAT_YCBCR_REV] = true;
 131
 132    /* GL_3DFX_texture_compression_FXT1 */
 133    ctx->TextureFormatSupported[MESA_FORMAT_RGB_FXT1] = true;
 134    ctx->TextureFormatSupported[MESA_FORMAT_RGBA_FXT1] = true;
 135
 136    /* GL_EXT_texture_compression_s3tc */
 137    ctx->TextureFormatSupported[MESA_FORMAT_RGB_DXT1] = true;
 138    ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT1] = true;
 139    ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT3] = true;
 140    ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT5] = true;
 141 }
 142
 143 extern const struct tnl_pipeline_stage *intel_pipeline[];
 144
 145 bool
 146 i915CreateContext(int api,
 147                   const struct gl_config * mesaVis,
 148                   __DRIcontext * driContextPriv,
 149                   unsigned major_version,
 150                   unsigned minor_version,
 151                   unsigned *error,
 152                   void *sharedContextPrivate)
 153 {
 154    struct dd_function_table functions;
 155    struct i915_context *i915 = rzalloc(NULL, struct i915_context);
 156    struct intel_context *intel = &i915->intel;
 157    struct gl_context *ctx = &intel->ctx;
 158
 159    if (!i915) {
 160       *error = __DRI_CTX_ERROR_NO_MEMORY;
 161       return false;
 162    }
 163
 164    i915InitVtbl(i915);
 165
 166    i915InitDriverFunctions(&functions);
 167
 168    if (!intelInitContext(intel, api, mesaVis, driContextPriv,
 169                          sharedContextPrivate, &functions)) {
 170       free(i915);
 171       *error = __DRI_CTX_ERROR_NO_MEMORY;
 172       return false;
 173    }
 174
 175    /* Now that the extension bits are known, filter against the requested API
 176     * and version.
 177     */
 178    switch (api) {
 179    case API_OPENGL: {
 180       const unsigned max_version =
 181          (ctx->Extensions.ARB_fragment_shader &&
 182           ctx->Extensions.ARB_occlusion_query) ? 20 : 15;
 183       const unsigned req_version = major_version * 10 + minor_version;
 184
 185       if (req_version > max_version) {
 186          *error = __DRI_CTX_ERROR_BAD_VERSION;
 187          free(i915);
 188          return false;
 189       }
 190       break;
 191    }
 192    case API_OPENGLES:
 193    case API_OPENGLES2:
 194       break;
 195    default:
 196       *error = __DRI_CTX_ERROR_BAD_API;
 197       free(i915);
 198       return false;
 199    }
 200
 201    intel_init_texture_formats(ctx);
 202
 203    _math_matrix_ctr(&intel->ViewportMatrix);
 204
 205    /* Initialize swrast, tnl driver tables: */
 206    intelInitSpanFuncs(ctx);
 207    intelInitTriFuncs(ctx);
 208
 209    /* Install the customized pipeline: */
 210    _tnl_destroy_pipeline(ctx);
 211    _tnl_install_pipeline(ctx, intel_pipeline);
 212
 213    if (intel->no_rast)
 214       FALLBACK(intel, INTEL_FALLBACK_USER, 1);
 215
 216    ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
 217    ctx->Const.MaxTextureImageUnits = I915_TEX_UNITS;
 218    ctx->Const.MaxTextureCoordUnits = I915_TEX_UNITS;
 219    ctx->Const.MaxVarying = I915_TEX_UNITS;
 220    ctx->Const.MaxCombinedTextureImageUnits =
 221       ctx->Const.MaxVertexTextureImageUnits +
 222       ctx->Const.MaxTextureImageUnits;
 223
 224    /* Advertise the full hardware capabilities.  The new memory
 225     * manager should cope much better with overload situations:
 226     */
 227    ctx->Const.MaxTextureLevels = 12;
 228    ctx->Const.Max3DTextureLevels = 9;
 229    ctx->Const.MaxCubeTextureLevels = 12;
 230    ctx->Const.MaxTextureRectSize = (1 << 11);
 231    ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
 232
 233    ctx->Const.MaxTextureMaxAnisotropy = 4.0;
 234
 235    /* GL_ARB_fragment_program limits - don't think Mesa actually
 236     * validates programs against these, and in any case one ARB
 237     * instruction can translate to more than one HW instruction, so
 238     * we'll still have to check and fallback each time.
 239     */
 240    ctx->Const.FragmentProgram.MaxNativeTemps = I915_MAX_TEMPORARY;
 241    ctx->Const.FragmentProgram.MaxNativeAttribs = 11;    /* 8 tex, 2 color, fog */
 242    ctx->Const.FragmentProgram.MaxNativeParameters = I915_MAX_CONSTANT;
 243    ctx->Const.FragmentProgram.MaxNativeAluInstructions = I915_MAX_ALU_INSN;
 244    ctx->Const.FragmentProgram.MaxNativeTexInstructions = I915_MAX_TEX_INSN;
 245    ctx->Const.FragmentProgram.MaxNativeInstructions = (I915_MAX_ALU_INSN +
 246                                                        I915_MAX_TEX_INSN);
 247    ctx->Const.FragmentProgram.MaxNativeTexIndirections =
 248       I915_MAX_TEX_INDIRECT;
 249    ctx->Const.FragmentProgram.MaxNativeAddressRegs = 0; /* I don't think we have one */
 250    ctx->Const.FragmentProgram.MaxEnvParams =
 251       MIN2(ctx->Const.FragmentProgram.MaxNativeParameters,
 252            ctx->Const.FragmentProgram.MaxEnvParams);
 253
 254    /* i915 stores all values in single-precision floats.  Values aren't set
 255     * for other program targets because software is used for those targets.
 256     */
 257    ctx->Const.FragmentProgram.MediumFloat.RangeMin = 127;
 258    ctx->Const.FragmentProgram.MediumFloat.RangeMax = 127;
 259    ctx->Const.FragmentProgram.MediumFloat.Precision = 23;
 260    ctx->Const.FragmentProgram.LowFloat = ctx->Const.FragmentProgram.HighFloat =
 261       ctx->Const.FragmentProgram.MediumFloat;
 262    ctx->Const.FragmentProgram.MediumInt.RangeMin = 24;
 263    ctx->Const.FragmentProgram.MediumInt.RangeMax = 24;
 264    ctx->Const.FragmentProgram.MediumInt.Precision = 0;
 265    ctx->Const.FragmentProgram.LowInt = ctx->Const.FragmentProgram.HighInt =
 266       ctx->Const.FragmentProgram.MediumInt;
 267
 268    ctx->FragmentProgram._MaintainTexEnvProgram = true;
 269
 270    /* FINISHME: Are there other options that should be enabled for software
 271     * FINISHME: vertex shaders?
 272     */
 273    ctx->ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitCondCodes = true;
 274
 275    struct gl_shader_compiler_options *const fs_options =
 276       & ctx->ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
 277    fs_options->MaxIfDepth = 0;
 278    fs_options->EmitNoNoise = true;
 279    fs_options->EmitNoPow = true;
 280    fs_options->EmitNoMainReturn = true;
 281    fs_options->EmitNoIndirectInput = true;
 282    fs_options->EmitNoIndirectOutput = true;
 283    fs_options->EmitNoIndirectUniform = true;
 284    fs_options->EmitNoIndirectTemp = true;
 285
 286    ctx->Const.MaxDrawBuffers = 1;
 287
 288    _tnl_init_vertices(ctx, ctx->Const.MaxArrayLockSize + 12,
 289                       36 * sizeof(GLfloat));
 290
 291    intel->verts = TNL_CONTEXT(ctx)->clipspace.vertex_buf;
 292
 293    i915InitState(i915);
 294
 295    /* Always enable pixel fog.  Vertex fog using fog coord will conflict
 296     * with fog code appended onto fragment program.
 297     */
 298    _tnl_allow_vertex_fog(ctx, 0);
 299    _tnl_allow_pixel_fog(ctx, 1);
 300
 301    return true;
 302 }