i915_context.c revision a11fe62058ad9d44170be9346111e3f6630a3327 
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/api_exec.h"
30#include "main/imports.h"
31#include "main/macros.h"
32#include "main/version.h"
33#include "main/vtxfmt.h"
34#include "intel_tris.h"
35#include "tnl/t_context.h"
36#include "tnl/t_pipeline.h"
37#include "tnl/t_vertex.h"
38
39#include "swrast/swrast.h"
40#include "swrast_setup/swrast_setup.h"
41#include "tnl/tnl.h"
42#include "../glsl/ralloc.h"
43
44#include "i915_reg.h"
45#include "i915_program.h"
46
47#include "intel_span.h"
48
49/***************************************
50 * Mesa's Driver Functions
51 ***************************************/
52
53/* Override intel default.
54 */
55static void
56i915InvalidateState(struct gl_context * ctx, GLuint new_state)
57{
58   _swrast_InvalidateState(ctx, new_state);
59   _swsetup_InvalidateState(ctx, new_state);
60   _vbo_InvalidateState(ctx, new_state);
61   _tnl_InvalidateState(ctx, new_state);
62   _tnl_invalidate_vertex_state(ctx, new_state);
63   intel_context(ctx)->NewGLState |= new_state;
64
65   /* Todo: gather state values under which tracked parameters become
66    * invalidated, add callbacks for things like
67    * ProgramLocalParameters, etc.
68    */
69   {
70      struct i915_fragment_program *p =
71         (struct i915_fragment_program *) ctx->FragmentProgram._Current;
72      if (p && p->nr_params)
73         p->params_uptodate = 0;
74   }
75
76   if (new_state & (_NEW_STENCIL | _NEW_BUFFERS | _NEW_POLYGON))
77      i915_update_stencil(ctx);
78   if (new_state & (_NEW_LIGHT))
79       i915_update_provoking_vertex(ctx);
80   if (new_state & (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS))
81       i915_update_program(ctx);
82   if (new_state & (_NEW_PROGRAM | _NEW_POINT))
83       i915_update_sprite_point_enable(ctx);
84}
85
86
87static void
88i915InitDriverFunctions(struct dd_function_table *functions)
89{
90   intelInitDriverFunctions(functions);
91   i915InitStateFunctions(functions);
92   i915InitFragProgFuncs(functions);
93   functions->UpdateState = i915InvalidateState;
94}
95
96/* Note: this is shared with i830. */
97void
98intel_init_texture_formats(struct gl_context *ctx)
99{
100   struct intel_context *intel = intel_context(ctx);
101   struct intel_screen *intel_screen = intel->intelScreen;
102
103   ctx->TextureFormatSupported[MESA_FORMAT_ARGB8888] = true;
104   if (intel_screen->deviceID != PCI_CHIP_I830_M &&
105       intel_screen->deviceID != PCI_CHIP_845_G)
106      ctx->TextureFormatSupported[MESA_FORMAT_XRGB8888] = true;
107   ctx->TextureFormatSupported[MESA_FORMAT_ARGB4444] = true;
108   ctx->TextureFormatSupported[MESA_FORMAT_ARGB1555] = true;
109   ctx->TextureFormatSupported[MESA_FORMAT_RGB565] = true;
110   ctx->TextureFormatSupported[MESA_FORMAT_L8] = true;
111   ctx->TextureFormatSupported[MESA_FORMAT_A8] = true;
112   ctx->TextureFormatSupported[MESA_FORMAT_I8] = true;
113   ctx->TextureFormatSupported[MESA_FORMAT_AL88] = true;
114
115   /* Depth and stencil */
116   ctx->TextureFormatSupported[MESA_FORMAT_S8_Z24] = true;
117   ctx->TextureFormatSupported[MESA_FORMAT_X8_Z24] = true;
118   ctx->TextureFormatSupported[MESA_FORMAT_S8] = intel->has_separate_stencil;
119
120   /*
121    * This was disabled in initial FBO enabling to avoid combinations
122    * of depth+stencil that wouldn't work together.  We since decided
123    * that it was OK, since it's up to the app to come up with the
124    * combo that actually works, so this can probably be re-enabled.
125    */
126   /*
127   ctx->TextureFormatSupported[MESA_FORMAT_Z16] = true;
128   ctx->TextureFormatSupported[MESA_FORMAT_Z24] = true;
129   */
130
131   /* ctx->Extensions.MESA_ycbcr_texture */
132   ctx->TextureFormatSupported[MESA_FORMAT_YCBCR] = true;
133   ctx->TextureFormatSupported[MESA_FORMAT_YCBCR_REV] = true;
134
135   /* GL_3DFX_texture_compression_FXT1 */
136   ctx->TextureFormatSupported[MESA_FORMAT_RGB_FXT1] = true;
137   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_FXT1] = true;
138
139   /* GL_EXT_texture_compression_s3tc */
140   ctx->TextureFormatSupported[MESA_FORMAT_RGB_DXT1] = true;
141   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT1] = true;
142   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT3] = true;
143   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT5] = true;
144}
145
146extern const struct tnl_pipeline_stage *intel_pipeline[];
147
148bool
149i915CreateContext(int api,
150		  const struct gl_config * mesaVis,
151                  __DRIcontext * driContextPriv,
152                  unsigned major_version,
153                  unsigned minor_version,
154                  unsigned *error,
155                  void *sharedContextPrivate)
156{
157   struct dd_function_table functions;
158   struct i915_context *i915 = rzalloc(NULL, struct i915_context);
159   struct intel_context *intel = &i915->intel;
160   struct gl_context *ctx = &intel->ctx;
161
162   if (!i915) {
163      *error = __DRI_CTX_ERROR_NO_MEMORY;
164      return false;
165   }
166
167   i915InitVtbl(i915);
168
169   i915InitDriverFunctions(&functions);
170
171   if (!intelInitContext(intel, api, major_version, minor_version,
172                         mesaVis, driContextPriv,
173                         sharedContextPrivate, &functions,
174                         error)) {
175      ralloc_free(i915);
176      return false;
177   }
178
179   intel_init_texture_formats(ctx);
180
181   _math_matrix_ctr(&intel->ViewportMatrix);
182
183   /* Initialize swrast, tnl driver tables: */
184   intelInitSpanFuncs(ctx);
185   intelInitTriFuncs(ctx);
186
187   /* Install the customized pipeline: */
188   _tnl_destroy_pipeline(ctx);
189   _tnl_install_pipeline(ctx, intel_pipeline);
190
191   if (intel->no_rast)
192      FALLBACK(intel, INTEL_FALLBACK_USER, 1);
193
194   ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
195   ctx->Const.MaxTextureImageUnits = I915_TEX_UNITS;
196   ctx->Const.MaxTextureCoordUnits = I915_TEX_UNITS;
197   ctx->Const.MaxVarying = I915_TEX_UNITS;
198   ctx->Const.MaxCombinedTextureImageUnits =
199      ctx->Const.MaxVertexTextureImageUnits +
200      ctx->Const.MaxTextureImageUnits;
201
202   /* Advertise the full hardware capabilities.  The new memory
203    * manager should cope much better with overload situations:
204    */
205   ctx->Const.MaxTextureLevels = 12;
206   ctx->Const.Max3DTextureLevels = 9;
207   ctx->Const.MaxCubeTextureLevels = 12;
208   ctx->Const.MaxTextureRectSize = (1 << 11);
209   ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
210
211   ctx->Const.MaxTextureMaxAnisotropy = 4.0;
212
213   /* GL_ARB_fragment_program limits - don't think Mesa actually
214    * validates programs against these, and in any case one ARB
215    * instruction can translate to more than one HW instruction, so
216    * we'll still have to check and fallback each time.
217    */
218   ctx->Const.FragmentProgram.MaxNativeTemps = I915_MAX_TEMPORARY;
219   ctx->Const.FragmentProgram.MaxNativeAttribs = 11;    /* 8 tex, 2 color, fog */
220   ctx->Const.FragmentProgram.MaxNativeParameters = I915_MAX_CONSTANT;
221   ctx->Const.FragmentProgram.MaxNativeAluInstructions = I915_MAX_ALU_INSN;
222   ctx->Const.FragmentProgram.MaxNativeTexInstructions = I915_MAX_TEX_INSN;
223   ctx->Const.FragmentProgram.MaxNativeInstructions = (I915_MAX_ALU_INSN +
224                                                       I915_MAX_TEX_INSN);
225   ctx->Const.FragmentProgram.MaxNativeTexIndirections =
226      I915_MAX_TEX_INDIRECT;
227   ctx->Const.FragmentProgram.MaxNativeAddressRegs = 0; /* I don't think we have one */
228   ctx->Const.FragmentProgram.MaxEnvParams =
229      MIN2(ctx->Const.FragmentProgram.MaxNativeParameters,
230	   ctx->Const.FragmentProgram.MaxEnvParams);
231
232   /* i915 stores all values in single-precision floats.  Values aren't set
233    * for other program targets because software is used for those targets.
234    */
235   ctx->Const.FragmentProgram.MediumFloat.RangeMin = 127;
236   ctx->Const.FragmentProgram.MediumFloat.RangeMax = 127;
237   ctx->Const.FragmentProgram.MediumFloat.Precision = 23;
238   ctx->Const.FragmentProgram.LowFloat = ctx->Const.FragmentProgram.HighFloat =
239      ctx->Const.FragmentProgram.MediumFloat;
240   ctx->Const.FragmentProgram.MediumInt.RangeMin = 24;
241   ctx->Const.FragmentProgram.MediumInt.RangeMax = 24;
242   ctx->Const.FragmentProgram.MediumInt.Precision = 0;
243   ctx->Const.FragmentProgram.LowInt = ctx->Const.FragmentProgram.HighInt =
244      ctx->Const.FragmentProgram.MediumInt;
245
246   ctx->FragmentProgram._MaintainTexEnvProgram = true;
247
248   /* FINISHME: Are there other options that should be enabled for software
249    * FINISHME: vertex shaders?
250    */
251   ctx->ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitCondCodes = true;
252
253   struct gl_shader_compiler_options *const fs_options =
254      & ctx->ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
255   fs_options->MaxIfDepth = 0;
256   fs_options->EmitNoNoise = true;
257   fs_options->EmitNoPow = true;
258   fs_options->EmitNoMainReturn = true;
259   fs_options->EmitNoIndirectInput = true;
260   fs_options->EmitNoIndirectOutput = true;
261   fs_options->EmitNoIndirectUniform = true;
262   fs_options->EmitNoIndirectTemp = true;
263
264   ctx->Const.MaxDrawBuffers = 1;
265
266   _tnl_init_vertices(ctx, ctx->Const.MaxArrayLockSize + 12,
267                      36 * sizeof(GLfloat));
268
269   intel->verts = TNL_CONTEXT(ctx)->clipspace.vertex_buf;
270
271   i915InitState(i915);
272
273   /* Always enable pixel fog.  Vertex fog using fog coord will conflict
274    * with fog code appended onto fragment program.
275    */
276   _tnl_allow_vertex_fog(ctx, 0);
277   _tnl_allow_pixel_fog(ctx, 1);
278
279   _mesa_compute_version(ctx);
280
281   _mesa_initialize_exec_table(ctx);
282   _mesa_initialize_vbo_vtxfmt(ctx);
283
284   return true;
285}
286