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
  40 #include "i915_reg.h"
  41 #include "i915_program.h"
  42
  43 #include "intel_span.h"
  44
  45 /***************************************
  46  * Mesa's Driver Functions
  47  ***************************************/
  48
  49 /* Override intel default.
  50  */
  51 static void
  52 i915InvalidateState(struct gl_context * ctx, GLuint new_state)
  53 {
  54    _swrast_InvalidateState(ctx, new_state);
  55    _swsetup_InvalidateState(ctx, new_state);
  56    _vbo_InvalidateState(ctx, new_state);
  57    _tnl_InvalidateState(ctx, new_state);
  58    _tnl_invalidate_vertex_state(ctx, new_state);
  59    intel_context(ctx)->NewGLState |= new_state;
  60
  61    /* Todo: gather state values under which tracked parameters become
  62     * invalidated, add callbacks for things like
  63     * ProgramLocalParameters, etc.
  64     */
  65    {
  66       struct i915_fragment_program *p =
  67          (struct i915_fragment_program *) ctx->FragmentProgram._Current;
  68       if (p && p->nr_params)
  69          p->params_uptodate = 0;
  70    }
  71
  72    if (new_state & (_NEW_FOG | _NEW_HINT | _NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS))
  73       i915_update_fog(ctx);
  74    if (new_state & (_NEW_STENCIL | _NEW_BUFFERS | _NEW_POLYGON))
  75       i915_update_stencil(ctx);
  76    if (new_state & (_NEW_LIGHT))
  77        i915_update_provoking_vertex(ctx);
  78    if (new_state & (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS))
  79        i915_update_program(ctx);
  80 }
  81
  82
  83 static void
  84 i915InitDriverFunctions(struct dd_function_table *functions)
  85 {
  86    intelInitDriverFunctions(functions);
  87    i915InitStateFunctions(functions);
  88    i915InitFragProgFuncs(functions);
  89    functions->UpdateState = i915InvalidateState;
  90 }
  91
  92
  93 extern const struct tnl_pipeline_stage *intel_pipeline[];
  94
  95 GLboolean
  96 i915CreateContext(int api,
  97                   const struct gl_config * mesaVis,
  98                   __DRIcontext * driContextPriv,
  99                   void *sharedContextPrivate)
 100 {
 101    struct dd_function_table functions;
 102    struct i915_context *i915 =
 103       (struct i915_context *) CALLOC_STRUCT(i915_context);
 104    struct intel_context *intel = &i915->intel;
 105    struct gl_context *ctx = &intel->ctx;
 106
 107    if (!i915)
 108       return GL_FALSE;
 109
 110    i915InitVtbl(i915);
 111
 112    i915InitDriverFunctions(&functions);
 113
 114    if (!intelInitContext(intel, api, mesaVis, driContextPriv,
 115                          sharedContextPrivate, &functions)) {
 116       FREE(i915);
 117       return GL_FALSE;
 118    }
 119
 120    _math_matrix_ctr(&intel->ViewportMatrix);
 121
 122    /* Initialize swrast, tnl driver tables: */
 123    intelInitSpanFuncs(ctx);
 124    intelInitTriFuncs(ctx);
 125
 126    /* Install the customized pipeline: */
 127    _tnl_destroy_pipeline(ctx);
 128    _tnl_install_pipeline(ctx, intel_pipeline);
 129
 130    if (intel->no_rast)
 131       FALLBACK(intel, INTEL_FALLBACK_USER, 1);
 132
 133    ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
 134    ctx->Const.MaxTextureImageUnits = I915_TEX_UNITS;
 135    ctx->Const.MaxTextureCoordUnits = I915_TEX_UNITS;
 136    ctx->Const.MaxVarying = I915_TEX_UNITS;
 137    ctx->Const.MaxCombinedTextureImageUnits =
 138       ctx->Const.MaxVertexTextureImageUnits +
 139       ctx->Const.MaxTextureImageUnits;
 140
 141    /* Advertise the full hardware capabilities.  The new memory
 142     * manager should cope much better with overload situations:
 143     */
 144    ctx->Const.MaxTextureLevels = 12;
 145    ctx->Const.Max3DTextureLevels = 9;
 146    ctx->Const.MaxCubeTextureLevels = 12;
 147    ctx->Const.MaxTextureRectSize = (1 << 11);
 148    ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
 149
 150    ctx->Const.MaxTextureMaxAnisotropy = 4.0;
 151
 152    /* GL_ARB_fragment_program limits - don't think Mesa actually
 153     * validates programs against these, and in any case one ARB
 154     * instruction can translate to more than one HW instruction, so
 155     * we'll still have to check and fallback each time.
 156     */
 157    ctx->Const.FragmentProgram.MaxNativeTemps = I915_MAX_TEMPORARY;
 158    ctx->Const.FragmentProgram.MaxNativeAttribs = 11;    /* 8 tex, 2 color, fog */
 159    ctx->Const.FragmentProgram.MaxNativeParameters = I915_MAX_CONSTANT;
 160    ctx->Const.FragmentProgram.MaxNativeAluInstructions = I915_MAX_ALU_INSN;
 161    ctx->Const.FragmentProgram.MaxNativeTexInstructions = I915_MAX_TEX_INSN;
 162    ctx->Const.FragmentProgram.MaxNativeInstructions = (I915_MAX_ALU_INSN +
 163                                                        I915_MAX_TEX_INSN);
 164    ctx->Const.FragmentProgram.MaxNativeTexIndirections =
 165       I915_MAX_TEX_INDIRECT;
 166    ctx->Const.FragmentProgram.MaxNativeAddressRegs = 0; /* I don't think we have one */
 167    ctx->Const.FragmentProgram.MaxEnvParams =
 168       MIN2(ctx->Const.FragmentProgram.MaxNativeParameters,
 169            ctx->Const.FragmentProgram.MaxEnvParams);
 170
 171    /* i915 stores all values in single-precision floats.  Values aren't set
 172     * for other program targets because software is used for those targets.
 173     */
 174    ctx->Const.FragmentProgram.MediumFloat.RangeMin = 127;
 175    ctx->Const.FragmentProgram.MediumFloat.RangeMax = 127;
 176    ctx->Const.FragmentProgram.MediumFloat.Precision = 23;
 177    ctx->Const.FragmentProgram.LowFloat = ctx->Const.FragmentProgram.HighFloat =
 178       ctx->Const.FragmentProgram.MediumFloat;
 179    ctx->Const.FragmentProgram.MediumInt.RangeMin = 24;
 180    ctx->Const.FragmentProgram.MediumInt.RangeMax = 24;
 181    ctx->Const.FragmentProgram.MediumInt.Precision = 0;
 182    ctx->Const.FragmentProgram.LowInt = ctx->Const.FragmentProgram.HighInt =
 183       ctx->Const.FragmentProgram.MediumInt;
 184
 185    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 186
 187    /* FINISHME: Are there other options that should be enabled for software
 188     * FINISHME: vertex shaders?
 189     */
 190    ctx->ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitCondCodes = GL_TRUE;
 191    ctx->ShaderCompilerOptions[MESA_SHADER_FRAGMENT].EmitNoIfs = GL_TRUE;
 192    ctx->ShaderCompilerOptions[MESA_SHADER_FRAGMENT].EmitNoNoise = GL_TRUE;
 193    ctx->ShaderCompilerOptions[MESA_SHADER_FRAGMENT].EmitNoPow = GL_TRUE;
 194
 195    ctx->Const.MaxDrawBuffers = 1;
 196
 197    _tnl_init_vertices(ctx, ctx->Const.MaxArrayLockSize + 12,
 198                       36 * sizeof(GLfloat));
 199
 200    intel->verts = TNL_CONTEXT(ctx)->clipspace.vertex_buf;
 201
 202    i915InitState(i915);
 203
 204    return GL_TRUE;
 205 }