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 }
  80
  81
  82 static void
  83 i915InitDriverFunctions(struct dd_function_table *functions)
  84 {
  85    intelInitDriverFunctions(functions);
  86    i915InitStateFunctions(functions);
  87    i915InitFragProgFuncs(functions);
  88    functions->UpdateState = i915InvalidateState;
  89 }
  90
  91
  92 extern const struct tnl_pipeline_stage *intel_pipeline[];
  93
  94 GLboolean
  95 i915CreateContext(int api,
  96                   const struct gl_config * mesaVis,
  97                   __DRIcontext * driContextPriv,
  98                   void *sharedContextPrivate)
  99 {
 100    struct dd_function_table functions;
 101    struct i915_context *i915 = rzalloc(NULL, struct i915_context);
 102    struct intel_context *intel = &i915->intel;
 103    struct gl_context *ctx = &intel->ctx;
 104
 105    if (!i915)
 106       return GL_FALSE;
 107
 108    i915InitVtbl(i915);
 109
 110    i915InitDriverFunctions(&functions);
 111
 112    if (!intelInitContext(intel, api, mesaVis, driContextPriv,
 113                          sharedContextPrivate, &functions)) {
 114       FREE(i915);
 115       return GL_FALSE;
 116    }
 117
 118    _math_matrix_ctr(&intel->ViewportMatrix);
 119
 120    /* Initialize swrast, tnl driver tables: */
 121    intelInitSpanFuncs(ctx);
 122    intelInitTriFuncs(ctx);
 123
 124    /* Install the customized pipeline: */
 125    _tnl_destroy_pipeline(ctx);
 126    _tnl_install_pipeline(ctx, intel_pipeline);
 127
 128    if (intel->no_rast)
 129       FALLBACK(intel, INTEL_FALLBACK_USER, 1);
 130
 131    ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
 132    ctx->Const.MaxTextureImageUnits = I915_TEX_UNITS;
 133    ctx->Const.MaxTextureCoordUnits = I915_TEX_UNITS;
 134    ctx->Const.MaxVarying = I915_TEX_UNITS;
 135    ctx->Const.MaxCombinedTextureImageUnits =
 136       ctx->Const.MaxVertexTextureImageUnits +
 137       ctx->Const.MaxTextureImageUnits;
 138
 139    /* Advertise the full hardware capabilities.  The new memory
 140     * manager should cope much better with overload situations:
 141     */
 142    ctx->Const.MaxTextureLevels = 12;
 143    ctx->Const.Max3DTextureLevels = 9;
 144    ctx->Const.MaxCubeTextureLevels = 12;
 145    ctx->Const.MaxTextureRectSize = (1 << 11);
 146    ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
 147
 148    ctx->Const.MaxTextureMaxAnisotropy = 4.0;
 149
 150    /* GL_ARB_fragment_program limits - don't think Mesa actually
 151     * validates programs against these, and in any case one ARB
 152     * instruction can translate to more than one HW instruction, so
 153     * we'll still have to check and fallback each time.
 154     */
 155    ctx->Const.FragmentProgram.MaxNativeTemps = I915_MAX_TEMPORARY;
 156    ctx->Const.FragmentProgram.MaxNativeAttribs = 11;    /* 8 tex, 2 color, fog */
 157    ctx->Const.FragmentProgram.MaxNativeParameters = I915_MAX_CONSTANT;
 158    ctx->Const.FragmentProgram.MaxNativeAluInstructions = I915_MAX_ALU_INSN;
 159    ctx->Const.FragmentProgram.MaxNativeTexInstructions = I915_MAX_TEX_INSN;
 160    ctx->Const.FragmentProgram.MaxNativeInstructions = (I915_MAX_ALU_INSN +
 161                                                        I915_MAX_TEX_INSN);
 162    ctx->Const.FragmentProgram.MaxNativeTexIndirections =
 163       I915_MAX_TEX_INDIRECT;
 164    ctx->Const.FragmentProgram.MaxNativeAddressRegs = 0; /* I don't think we have one */
 165    ctx->Const.FragmentProgram.MaxEnvParams =
 166       MIN2(ctx->Const.FragmentProgram.MaxNativeParameters,
 167            ctx->Const.FragmentProgram.MaxEnvParams);
 168
 169    /* i915 stores all values in single-precision floats.  Values aren't set
 170     * for other program targets because software is used for those targets.
 171     */
 172    ctx->Const.FragmentProgram.MediumFloat.RangeMin = 127;
 173    ctx->Const.FragmentProgram.MediumFloat.RangeMax = 127;
 174    ctx->Const.FragmentProgram.MediumFloat.Precision = 23;
 175    ctx->Const.FragmentProgram.LowFloat = ctx->Const.FragmentProgram.HighFloat =
 176       ctx->Const.FragmentProgram.MediumFloat;
 177    ctx->Const.FragmentProgram.MediumInt.RangeMin = 24;
 178    ctx->Const.FragmentProgram.MediumInt.RangeMax = 24;
 179    ctx->Const.FragmentProgram.MediumInt.Precision = 0;
 180    ctx->Const.FragmentProgram.LowInt = ctx->Const.FragmentProgram.HighInt =
 181       ctx->Const.FragmentProgram.MediumInt;
 182
 183    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 184
 185    /* FINISHME: Are there other options that should be enabled for software
 186     * FINISHME: vertex shaders?
 187     */
 188    ctx->ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitCondCodes = GL_TRUE;
 189
 190    struct gl_shader_compiler_options *const fs_options =
 191       & ctx->ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
 192    fs_options->EmitNoIfs = GL_TRUE;
 193    fs_options->EmitNoNoise = GL_TRUE;
 194    fs_options->EmitNoPow = GL_TRUE;
 195    fs_options->EmitNoMainReturn = GL_TRUE;
 196    fs_options->EmitNoIndirectInput = GL_TRUE;
 197    fs_options->EmitNoIndirectOutput = GL_TRUE;
 198    fs_options->EmitNoIndirectUniform = GL_TRUE;
 199    fs_options->EmitNoIndirectTemp = GL_TRUE;
 200
 201    ctx->Const.MaxDrawBuffers = 1;
 202
 203    _tnl_init_vertices(ctx, ctx->Const.MaxArrayLockSize + 12,
 204                       36 * sizeof(GLfloat));
 205
 206    intel->verts = TNL_CONTEXT(ctx)->clipspace.vertex_buf;
 207
 208    i915InitState(i915);
 209
 210    /* Always enable pixel fog.  Vertex fog using fog coord will conflict
 211     * with fog code appended onto fragment program.
 212     */
 213    _tnl_allow_vertex_fog(ctx, 0);
 214    _tnl_allow_pixel_fog(ctx, 1);
 215
 216    return GL_TRUE;
 217 }