1/**************************************************************************
2 *
3 * Copyright 2003 VMware, Inc.
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 VMWARE 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/framebuffer.h"
31#include "main/extensions.h"
32#include "main/imports.h"
33#include "main/macros.h"
34#include "main/version.h"
35#include "main/vtxfmt.h"
36#include "intel_chipset.h"
37#include "intel_tris.h"
38#include "tnl/t_context.h"
39#include "tnl/t_pipeline.h"
40#include "tnl/t_vertex.h"
41
42#include "swrast/swrast.h"
43#include "swrast_setup/swrast_setup.h"
44#include "tnl/tnl.h"
45#include "util/ralloc.h"
46
47#include "i915_reg.h"
48#include "i915_program.h"
49
50/***************************************
51 * Mesa's Driver Functions
52 ***************************************/
53
54/* Override intel default.
55 */
56static void
57i915InvalidateState(struct gl_context * ctx)
58{
59   GLuint new_state = ctx->NewState;
60
61   _swrast_InvalidateState(ctx, new_state);
62   _swsetup_InvalidateState(ctx, new_state);
63   _tnl_InvalidateState(ctx, new_state);
64   _tnl_invalidate_vertex_state(ctx, new_state);
65   intel_context(ctx)->NewGLState |= new_state;
66
67   if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
68      _mesa_update_draw_buffer_bounds(ctx, ctx->DrawBuffer);
69
70   /* Todo: gather state values under which tracked parameters become
71    * invalidated, add callbacks for things like
72    * ProgramLocalParameters, etc.
73    */
74   {
75      struct i915_fragment_program *p =
76         (struct i915_fragment_program *) ctx->FragmentProgram._Current;
77      if (p && p->nr_params)
78         p->params_uptodate = 0;
79   }
80
81   if (new_state & (_NEW_STENCIL | _NEW_BUFFERS | _NEW_POLYGON))
82      i915_update_stencil(ctx);
83   if (new_state & (_NEW_LIGHT))
84       i915_update_provoking_vertex(ctx);
85   if (new_state & (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS))
86       i915_update_program(ctx);
87   if (new_state & (_NEW_PROGRAM | _NEW_POINT))
88       i915_update_sprite_point_enable(ctx);
89}
90
91
92static void
93i915InitDriverFunctions(struct dd_function_table *functions)
94{
95   intelInitDriverFunctions(functions);
96   i915InitStateFunctions(functions);
97   i915InitFragProgFuncs(functions);
98   functions->UpdateState = i915InvalidateState;
99}
100
101/* Note: this is shared with i830. */
102void
103intel_init_texture_formats(struct gl_context *ctx)
104{
105   struct intel_context *intel = intel_context(ctx);
106   struct intel_screen *intel_screen = intel->intelScreen;
107
108   ctx->TextureFormatSupported[MESA_FORMAT_B8G8R8A8_UNORM] = true;
109   if (intel_screen->deviceID != PCI_CHIP_I830_M &&
110       intel_screen->deviceID != PCI_CHIP_845_G)
111      ctx->TextureFormatSupported[MESA_FORMAT_B8G8R8X8_UNORM] = true;
112   if (intel->gen == 3)
113      ctx->TextureFormatSupported[MESA_FORMAT_B8G8R8A8_SRGB] = true;
114   ctx->TextureFormatSupported[MESA_FORMAT_B4G4R4A4_UNORM] = true;
115   ctx->TextureFormatSupported[MESA_FORMAT_B5G5R5A1_UNORM] = true;
116   ctx->TextureFormatSupported[MESA_FORMAT_B5G6R5_UNORM] = true;
117   ctx->TextureFormatSupported[MESA_FORMAT_L_UNORM8] = true;
118   if (intel->gen == 3)
119      ctx->TextureFormatSupported[MESA_FORMAT_A_UNORM8] = true;
120   ctx->TextureFormatSupported[MESA_FORMAT_I_UNORM8] = true;
121   ctx->TextureFormatSupported[MESA_FORMAT_L8A8_UNORM] = true;
122
123   /* Depth and stencil */
124   if (intel->gen == 3) {
125      ctx->TextureFormatSupported[MESA_FORMAT_Z24_UNORM_S8_UINT] = true;
126      ctx->TextureFormatSupported[MESA_FORMAT_Z24_UNORM_X8_UINT] = true;
127
128      /*
129       * This was disabled in initial FBO enabling to avoid combinations
130       * of depth+stencil that wouldn't work together.  We since decided
131       * that it was OK, since it's up to the app to come up with the
132       * combo that actually works, so this can probably be re-enabled.
133       */
134      /*
135      ctx->TextureFormatSupported[MESA_FORMAT_Z_UNORM16] = true;
136      ctx->TextureFormatSupported[MESA_FORMAT_Z24] = true;
137      */
138   }
139
140   /* ctx->Extensions.MESA_ycbcr_texture */
141   ctx->TextureFormatSupported[MESA_FORMAT_YCBCR] = true;
142   ctx->TextureFormatSupported[MESA_FORMAT_YCBCR_REV] = true;
143
144   /* GL_3DFX_texture_compression_FXT1 */
145   ctx->TextureFormatSupported[MESA_FORMAT_RGB_FXT1] = true;
146   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_FXT1] = true;
147
148   /* GL_EXT_texture_compression_s3tc */
149   ctx->TextureFormatSupported[MESA_FORMAT_RGB_DXT1] = true;
150   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT1] = true;
151   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT3] = true;
152   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT5] = true;
153}
154
155extern const struct tnl_pipeline_stage *intel_pipeline[];
156
157bool
158i915CreateContext(int api,
159		  const struct gl_config * mesaVis,
160                  __DRIcontext * driContextPriv,
161                  unsigned major_version,
162                  unsigned minor_version,
163                  uint32_t flags,
164                  unsigned *error,
165                  void *sharedContextPrivate)
166{
167   struct dd_function_table functions;
168   struct i915_context *i915 = rzalloc(NULL, struct i915_context);
169   struct intel_context *intel = &i915->intel;
170   struct gl_context *ctx = &intel->ctx;
171
172   if (!i915) {
173      *error = __DRI_CTX_ERROR_NO_MEMORY;
174      return false;
175   }
176
177   i915InitVtbl(i915);
178
179   i915InitDriverFunctions(&functions);
180
181   if (!intelInitContext(intel, api, major_version, minor_version, flags,
182                         mesaVis, driContextPriv,
183                         sharedContextPrivate, &functions,
184                         error)) {
185      ralloc_free(i915);
186      return false;
187   }
188
189   intel_init_texture_formats(ctx);
190
191   _math_matrix_ctr(&intel->ViewportMatrix);
192
193   /* Initialize swrast, tnl driver tables: */
194   intelInitTriFuncs(ctx);
195
196   /* Install the customized pipeline: */
197   _tnl_destroy_pipeline(ctx);
198   _tnl_install_pipeline(ctx, intel_pipeline);
199
200   if (intel->no_rast)
201      FALLBACK(intel, INTEL_FALLBACK_USER, 1);
202
203   ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
204   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits = I915_TEX_UNITS;
205   ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits = I915_TEX_UNITS;
206   ctx->Const.MaxTextureCoordUnits = I915_TEX_UNITS;
207   ctx->Const.MaxVarying = I915_TEX_UNITS;
208   ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents =
209      ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents = ctx->Const.MaxVarying * 4;
210   ctx->Const.MaxCombinedTextureImageUnits =
211      ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
212      ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
213
214   /* Advertise the full hardware capabilities.  The new memory
215    * manager should cope much better with overload situations:
216    */
217   ctx->Const.MaxTextureLevels = 12;
218   ctx->Const.Max3DTextureLevels = 9;
219   ctx->Const.MaxCubeTextureLevels = 12;
220   ctx->Const.MaxTextureRectSize = (1 << 11);
221   ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
222
223   ctx->Const.MaxTextureMaxAnisotropy = 4.0;
224
225   /* GL_ARB_fragment_program limits - don't think Mesa actually
226    * validates programs against these, and in any case one ARB
227    * instruction can translate to more than one HW instruction, so
228    * we'll still have to check and fallback each time.
229    */
230   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeTemps = I915_MAX_TEMPORARY;
231   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeAttribs = 11;    /* 8 tex, 2 color, fog */
232   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeParameters = I915_MAX_CONSTANT;
233   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeAluInstructions = I915_MAX_ALU_INSN;
234   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeTexInstructions = I915_MAX_TEX_INSN;
235   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeInstructions = (I915_MAX_ALU_INSN +
236                                                       I915_MAX_TEX_INSN);
237   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeTexIndirections =
238      I915_MAX_TEX_INDIRECT;
239   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeAddressRegs = 0; /* I don't think we have one */
240   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxEnvParams =
241      MIN2(ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeParameters,
242	   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxEnvParams);
243
244   /* i915 stores all values in single-precision floats.  Values aren't set
245    * for other program targets because software is used for those targets.
246    */
247   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumFloat.RangeMin = 127;
248   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumFloat.RangeMax = 127;
249   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumFloat.Precision = 23;
250   ctx->Const.Program[MESA_SHADER_FRAGMENT].LowFloat = ctx->Const.Program[MESA_SHADER_FRAGMENT].HighFloat =
251      ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumFloat;
252   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumInt.RangeMin = 24;
253   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumInt.RangeMax = 24;
254   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumInt.Precision = 0;
255   ctx->Const.Program[MESA_SHADER_FRAGMENT].LowInt = ctx->Const.Program[MESA_SHADER_FRAGMENT].HighInt =
256      ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumInt;
257
258   ctx->FragmentProgram._MaintainTexEnvProgram = true;
259
260   /* FINISHME: Are there other options that should be enabled for software
261    * FINISHME: vertex shaders?
262    */
263   ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoIndirectSampler =
264      true;
265
266   struct gl_shader_compiler_options *const fs_options =
267      & ctx->Const.ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
268   fs_options->MaxIfDepth = 0;
269   fs_options->EmitNoPow = true;
270   fs_options->EmitNoMainReturn = true;
271   fs_options->EmitNoIndirectInput = true;
272   fs_options->EmitNoIndirectOutput = true;
273   fs_options->EmitNoIndirectUniform = true;
274   fs_options->EmitNoIndirectTemp = true;
275   fs_options->EmitNoIndirectSampler = true;
276
277   ctx->Const.MaxDrawBuffers = 1;
278   ctx->Const.QueryCounterBits.SamplesPassed = 0;
279
280   _tnl_init_vertices(ctx, ctx->Const.MaxArrayLockSize + 12,
281                      36 * sizeof(GLfloat));
282
283   intel->verts = TNL_CONTEXT(ctx)->clipspace.vertex_buf;
284
285   i915InitState(i915);
286
287   /* Always enable pixel fog.  Vertex fog using fog coord will conflict
288    * with fog code appended onto fragment program.
289    */
290   _tnl_allow_vertex_fog(ctx, 0);
291   _tnl_allow_pixel_fog(ctx, 1);
292
293   _mesa_override_extensions(ctx);
294   _mesa_compute_version(ctx);
295
296   _mesa_initialize_dispatch_tables(ctx);
297   _mesa_initialize_vbo_vtxfmt(ctx);
298
299   return true;
300}
301