i915_context.c revision 7c60a95a0e4e4e8b31c9028a5edc22dca791dcb7 
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 */
52static void
53i915InvalidateState(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
84static void
85i915InitDriverFunctions(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. */
94void
95intel_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
143extern const struct tnl_pipeline_stage *intel_pipeline[];
144
145bool
146i915CreateContext(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      *error = __DRI_CTX_ERROR_NO_MEMORY;
171      return false;
172   }
173
174   /* Now that the extension bits are known, filter against the requested API
175    * and version.
176    */
177   switch (api) {
178   case API_OPENGL: {
179      const unsigned max_version =
180         (ctx->Extensions.ARB_fragment_shader &&
181          ctx->Extensions.ARB_occlusion_query) ? 20 : 15;
182      const unsigned req_version = major_version * 10 + minor_version;
183
184      if (req_version > max_version) {
185         *error = __DRI_CTX_ERROR_BAD_VERSION;
186         return false;
187      }
188      break;
189   }
190   case API_OPENGLES:
191   case API_OPENGLES2:
192      break;
193   default:
194      *error = __DRI_CTX_ERROR_BAD_API;
195      return false;
196   }
197
198   intel_init_texture_formats(ctx);
199
200   _math_matrix_ctr(&intel->ViewportMatrix);
201
202   /* Initialize swrast, tnl driver tables: */
203   intelInitSpanFuncs(ctx);
204   intelInitTriFuncs(ctx);
205
206   /* Install the customized pipeline: */
207   _tnl_destroy_pipeline(ctx);
208   _tnl_install_pipeline(ctx, intel_pipeline);
209
210   if (intel->no_rast)
211      FALLBACK(intel, INTEL_FALLBACK_USER, 1);
212
213   ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
214   ctx->Const.MaxTextureImageUnits = I915_TEX_UNITS;
215   ctx->Const.MaxTextureCoordUnits = I915_TEX_UNITS;
216   ctx->Const.MaxVarying = I915_TEX_UNITS;
217   ctx->Const.MaxCombinedTextureImageUnits =
218      ctx->Const.MaxVertexTextureImageUnits +
219      ctx->Const.MaxTextureImageUnits;
220
221   /* Advertise the full hardware capabilities.  The new memory
222    * manager should cope much better with overload situations:
223    */
224   ctx->Const.MaxTextureLevels = 12;
225   ctx->Const.Max3DTextureLevels = 9;
226   ctx->Const.MaxCubeTextureLevels = 12;
227   ctx->Const.MaxTextureRectSize = (1 << 11);
228   ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
229
230   ctx->Const.MaxTextureMaxAnisotropy = 4.0;
231
232   /* GL_ARB_fragment_program limits - don't think Mesa actually
233    * validates programs against these, and in any case one ARB
234    * instruction can translate to more than one HW instruction, so
235    * we'll still have to check and fallback each time.
236    */
237   ctx->Const.FragmentProgram.MaxNativeTemps = I915_MAX_TEMPORARY;
238   ctx->Const.FragmentProgram.MaxNativeAttribs = 11;    /* 8 tex, 2 color, fog */
239   ctx->Const.FragmentProgram.MaxNativeParameters = I915_MAX_CONSTANT;
240   ctx->Const.FragmentProgram.MaxNativeAluInstructions = I915_MAX_ALU_INSN;
241   ctx->Const.FragmentProgram.MaxNativeTexInstructions = I915_MAX_TEX_INSN;
242   ctx->Const.FragmentProgram.MaxNativeInstructions = (I915_MAX_ALU_INSN +
243                                                       I915_MAX_TEX_INSN);
244   ctx->Const.FragmentProgram.MaxNativeTexIndirections =
245      I915_MAX_TEX_INDIRECT;
246   ctx->Const.FragmentProgram.MaxNativeAddressRegs = 0; /* I don't think we have one */
247   ctx->Const.FragmentProgram.MaxEnvParams =
248      MIN2(ctx->Const.FragmentProgram.MaxNativeParameters,
249	   ctx->Const.FragmentProgram.MaxEnvParams);
250
251   /* i915 stores all values in single-precision floats.  Values aren't set
252    * for other program targets because software is used for those targets.
253    */
254   ctx->Const.FragmentProgram.MediumFloat.RangeMin = 127;
255   ctx->Const.FragmentProgram.MediumFloat.RangeMax = 127;
256   ctx->Const.FragmentProgram.MediumFloat.Precision = 23;
257   ctx->Const.FragmentProgram.LowFloat = ctx->Const.FragmentProgram.HighFloat =
258      ctx->Const.FragmentProgram.MediumFloat;
259   ctx->Const.FragmentProgram.MediumInt.RangeMin = 24;
260   ctx->Const.FragmentProgram.MediumInt.RangeMax = 24;
261   ctx->Const.FragmentProgram.MediumInt.Precision = 0;
262   ctx->Const.FragmentProgram.LowInt = ctx->Const.FragmentProgram.HighInt =
263      ctx->Const.FragmentProgram.MediumInt;
264
265   ctx->FragmentProgram._MaintainTexEnvProgram = true;
266
267   /* FINISHME: Are there other options that should be enabled for software
268    * FINISHME: vertex shaders?
269    */
270   ctx->ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitCondCodes = true;
271
272   struct gl_shader_compiler_options *const fs_options =
273      & ctx->ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
274   fs_options->MaxIfDepth = 0;
275   fs_options->EmitNoNoise = true;
276   fs_options->EmitNoPow = true;
277   fs_options->EmitNoMainReturn = true;
278   fs_options->EmitNoIndirectInput = true;
279   fs_options->EmitNoIndirectOutput = true;
280   fs_options->EmitNoIndirectUniform = true;
281   fs_options->EmitNoIndirectTemp = true;
282
283   ctx->Const.MaxDrawBuffers = 1;
284
285   _tnl_init_vertices(ctx, ctx->Const.MaxArrayLockSize + 12,
286                      36 * sizeof(GLfloat));
287
288   intel->verts = TNL_CONTEXT(ctx)->clipspace.vertex_buf;
289
290   i915InitState(i915);
291
292   /* Always enable pixel fog.  Vertex fog using fog coord will conflict
293    * with fog code appended onto fragment program.
294    */
295   _tnl_allow_vertex_fog(ctx, 0);
296   _tnl_allow_pixel_fog(ctx, 1);
297
298   return true;
299}
300