i830_texstate.c revision 39cc0ee3eaf0d0cae70d91ae33961053782662c8 
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 "main/mtypes.h"
29#include "main/enums.h"
30#include "main/colormac.h"
31#include "main/macros.h"
32
33#include "intel_mipmap_tree.h"
34#include "intel_tex.h"
35
36#include "i830_context.h"
37#include "i830_reg.h"
38#include "intel_chipset.h"
39
40
41static GLuint
42translate_texture_format(GLuint mesa_format, GLuint internal_format)
43{
44   switch (mesa_format) {
45   case MESA_FORMAT_L8:
46      return MAPSURF_8BIT | MT_8BIT_L8;
47   case MESA_FORMAT_I8:
48      return MAPSURF_8BIT | MT_8BIT_I8;
49   case MESA_FORMAT_A8:
50      return MAPSURF_8BIT | MT_8BIT_I8; /* Kludge! */
51   case MESA_FORMAT_AL88:
52      return MAPSURF_16BIT | MT_16BIT_AY88;
53   case MESA_FORMAT_RGB565:
54      return MAPSURF_16BIT | MT_16BIT_RGB565;
55   case MESA_FORMAT_ARGB1555:
56      return MAPSURF_16BIT | MT_16BIT_ARGB1555;
57   case MESA_FORMAT_ARGB4444:
58      return MAPSURF_16BIT | MT_16BIT_ARGB4444;
59   case MESA_FORMAT_ARGB8888:
60      return MAPSURF_32BIT | MT_32BIT_ARGB8888;
61   case MESA_FORMAT_XRGB8888:
62      return MAPSURF_32BIT | MT_32BIT_XRGB8888;
63   case MESA_FORMAT_YCBCR_REV:
64      return (MAPSURF_422 | MT_422_YCRCB_NORMAL);
65   case MESA_FORMAT_YCBCR:
66      return (MAPSURF_422 | MT_422_YCRCB_SWAPY);
67   case MESA_FORMAT_RGB_FXT1:
68   case MESA_FORMAT_RGBA_FXT1:
69      return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1);
70   case MESA_FORMAT_RGBA_DXT1:
71   case MESA_FORMAT_RGB_DXT1:
72      return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
73   case MESA_FORMAT_RGBA_DXT3:
74      return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
75   case MESA_FORMAT_RGBA_DXT5:
76      return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
77   default:
78      fprintf(stderr, "%s: bad image format %x\n", __FUNCTION__, mesa_format);
79      abort();
80      return 0;
81   }
82}
83
84
85
86
87/* The i915 (and related graphics cores) do not support GL_CLAMP.  The
88 * Intel drivers for "other operating systems" implement GL_CLAMP as
89 * GL_CLAMP_TO_EDGE, so the same is done here.
90 */
91static GLuint
92translate_wrap_mode(GLenum wrap)
93{
94   switch (wrap) {
95   case GL_REPEAT:
96      return TEXCOORDMODE_WRAP;
97   case GL_CLAMP:
98   case GL_CLAMP_TO_EDGE:
99      return TEXCOORDMODE_CLAMP;        /* not really correct */
100   case GL_CLAMP_TO_BORDER:
101      return TEXCOORDMODE_CLAMP_BORDER;
102   case GL_MIRRORED_REPEAT:
103      return TEXCOORDMODE_MIRROR;
104   default:
105      return TEXCOORDMODE_WRAP;
106   }
107}
108
109
110/* Recalculate all state from scratch.  Perhaps not the most
111 * efficient, but this has gotten complex enough that we need
112 * something which is understandable and reliable.
113 */
114static GLboolean
115i830_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
116{
117   struct gl_context *ctx = &intel->ctx;
118   struct i830_context *i830 = i830_context(ctx);
119   struct gl_texture_unit *tUnit = &ctx->Texture.Unit[unit];
120   struct gl_texture_object *tObj = tUnit->_Current;
121   struct intel_texture_object *intelObj = intel_texture_object(tObj);
122   struct gl_texture_image *firstImage;
123   GLuint *state = i830->state.Tex[unit], format, pitch;
124   GLint lodbias;
125   GLubyte border[4];
126   GLuint dst_x, dst_y;
127
128   memset(state, 0, sizeof(state));
129
130   /*We need to refcount these. */
131
132   if (i830->state.tex_buffer[unit] != NULL) {
133       drm_intel_bo_unreference(i830->state.tex_buffer[unit]);
134       i830->state.tex_buffer[unit] = NULL;
135   }
136
137   if (!intel_finalize_mipmap_tree(intel, unit))
138      return GL_FALSE;
139
140   /* Get first image here, since intelObj->firstLevel will get set in
141    * the intel_finalize_mipmap_tree() call above.
142    */
143   firstImage = tObj->Image[0][intelObj->firstLevel];
144
145   intel_miptree_get_image_offset(intelObj->mt, intelObj->firstLevel, 0, 0,
146				  &dst_x, &dst_y);
147
148   drm_intel_bo_reference(intelObj->mt->region->buffer);
149   i830->state.tex_buffer[unit] = intelObj->mt->region->buffer;
150   pitch = intelObj->mt->region->pitch * intelObj->mt->cpp;
151
152   /* XXX: This calculation is probably broken for tiled images with
153    * a non-page-aligned offset.
154    */
155   i830->state.tex_offset[unit] = dst_x * intelObj->mt->cpp + dst_y * pitch;
156
157   format = translate_texture_format(firstImage->TexFormat,
158				     firstImage->InternalFormat);
159
160   state[I830_TEXREG_TM0LI] = (_3DSTATE_LOAD_STATE_IMMEDIATE_2 |
161                               (LOAD_TEXTURE_MAP0 << unit) | 4);
162
163   state[I830_TEXREG_TM0S1] =
164      (((firstImage->Height - 1) << TM0S1_HEIGHT_SHIFT) |
165       ((firstImage->Width - 1) << TM0S1_WIDTH_SHIFT) | format);
166
167   if (intelObj->mt->region->tiling != I915_TILING_NONE) {
168      state[I830_TEXREG_TM0S1] |= TM0S1_TILED_SURFACE;
169      if (intelObj->mt->region->tiling == I915_TILING_Y)
170	 state[I830_TEXREG_TM0S1] |= TM0S1_TILE_WALK;
171   }
172
173   state[I830_TEXREG_TM0S2] =
174      ((((pitch / 4) - 1) << TM0S2_PITCH_SHIFT) | TM0S2_CUBE_FACE_ENA_MASK);
175
176   {
177      if (tObj->Target == GL_TEXTURE_CUBE_MAP)
178         state[I830_TEXREG_CUBE] = (_3DSTATE_MAP_CUBE | MAP_UNIT(unit) |
179                                    CUBE_NEGX_ENABLE |
180                                    CUBE_POSX_ENABLE |
181                                    CUBE_NEGY_ENABLE |
182                                    CUBE_POSY_ENABLE |
183                                    CUBE_NEGZ_ENABLE | CUBE_POSZ_ENABLE);
184      else
185         state[I830_TEXREG_CUBE] = (_3DSTATE_MAP_CUBE | MAP_UNIT(unit));
186   }
187
188
189
190
191   {
192      GLuint minFilt, mipFilt, magFilt;
193      float maxlod;
194      uint32_t minlod_fixed, maxlod_fixed;
195
196      switch (tObj->MinFilter) {
197      case GL_NEAREST:
198         minFilt = FILTER_NEAREST;
199         mipFilt = MIPFILTER_NONE;
200         break;
201      case GL_LINEAR:
202         minFilt = FILTER_LINEAR;
203         mipFilt = MIPFILTER_NONE;
204         break;
205      case GL_NEAREST_MIPMAP_NEAREST:
206         minFilt = FILTER_NEAREST;
207         mipFilt = MIPFILTER_NEAREST;
208         break;
209      case GL_LINEAR_MIPMAP_NEAREST:
210         minFilt = FILTER_LINEAR;
211         mipFilt = MIPFILTER_NEAREST;
212         break;
213      case GL_NEAREST_MIPMAP_LINEAR:
214         minFilt = FILTER_NEAREST;
215         mipFilt = MIPFILTER_LINEAR;
216         break;
217      case GL_LINEAR_MIPMAP_LINEAR:
218         minFilt = FILTER_LINEAR;
219         mipFilt = MIPFILTER_LINEAR;
220         break;
221      default:
222         return GL_FALSE;
223      }
224
225      if (tObj->MaxAnisotropy > 1.0) {
226         minFilt = FILTER_ANISOTROPIC;
227         magFilt = FILTER_ANISOTROPIC;
228      }
229      else {
230         switch (tObj->MagFilter) {
231         case GL_NEAREST:
232            magFilt = FILTER_NEAREST;
233            break;
234         case GL_LINEAR:
235            magFilt = FILTER_LINEAR;
236            break;
237         default:
238            return GL_FALSE;
239         }
240      }
241
242      lodbias = (int) ((tUnit->LodBias + tObj->LodBias) * 16.0);
243      if (lodbias < -64)
244          lodbias = -64;
245      if (lodbias > 63)
246          lodbias = 63;
247
248      state[I830_TEXREG_TM0S3] = ((lodbias << TM0S3_LOD_BIAS_SHIFT) &
249                                  TM0S3_LOD_BIAS_MASK);
250#if 0
251      /* YUV conversion:
252       */
253      if (firstImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR ||
254          firstImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR_REV)
255         state[I830_TEXREG_TM0S3] |= SS2_COLORSPACE_CONVERSION;
256#endif
257
258      /* We get one field with fraction bits for the maximum
259       * addressable (smallest resolution) LOD.  Use it to cover both
260       * MAX_LEVEL and MAX_LOD.
261       */
262      minlod_fixed = U_FIXED(CLAMP(tObj->MinLod, 0.0, 11), 4);
263      maxlod = MIN2(tObj->MaxLod, tObj->_MaxLevel - tObj->BaseLevel);
264      if (intel->intelScreen->deviceID == PCI_CHIP_I855_GM ||
265	  intel->intelScreen->deviceID == PCI_CHIP_I865_G) {
266	 maxlod_fixed = U_FIXED(CLAMP(maxlod, 0.0, 11.75), 2);
267	 maxlod_fixed = MAX2(maxlod_fixed, (minlod_fixed + 3) >> 2);
268	 state[I830_TEXREG_TM0S3] |= maxlod_fixed << TM0S3_MIN_MIP_SHIFT;
269	 state[I830_TEXREG_TM0S2] |= TM0S2_LOD_PRECLAMP;
270      } else {
271	 maxlod_fixed = U_FIXED(CLAMP(maxlod, 0.0, 11), 0);
272	 maxlod_fixed = MAX2(maxlod_fixed, (minlod_fixed + 15) >> 4);
273	 state[I830_TEXREG_TM0S3] |= maxlod_fixed << TM0S3_MIN_MIP_SHIFT_830;
274      }
275      state[I830_TEXREG_TM0S3] |= minlod_fixed << TM0S3_MAX_MIP_SHIFT;
276      state[I830_TEXREG_TM0S3] |= ((minFilt << TM0S3_MIN_FILTER_SHIFT) |
277                                   (mipFilt << TM0S3_MIP_FILTER_SHIFT) |
278                                   (magFilt << TM0S3_MAG_FILTER_SHIFT));
279   }
280
281   {
282      GLenum ws = tObj->WrapS;
283      GLenum wt = tObj->WrapT;
284
285
286      /* 3D textures not available on i830
287       */
288      if (tObj->Target == GL_TEXTURE_3D)
289         return GL_FALSE;
290
291      state[I830_TEXREG_MCS] = (_3DSTATE_MAP_COORD_SET_CMD |
292                                MAP_UNIT(unit) |
293                                ENABLE_TEXCOORD_PARAMS |
294                                ss3 |
295                                ENABLE_ADDR_V_CNTL |
296                                TEXCOORD_ADDR_V_MODE(translate_wrap_mode(wt))
297                                | ENABLE_ADDR_U_CNTL |
298                                TEXCOORD_ADDR_U_MODE(translate_wrap_mode
299                                                     (ws)));
300   }
301
302   /* convert border color from float to ubyte */
303   CLAMPED_FLOAT_TO_UBYTE(border[0], tObj->BorderColor.f[0]);
304   CLAMPED_FLOAT_TO_UBYTE(border[1], tObj->BorderColor.f[1]);
305   CLAMPED_FLOAT_TO_UBYTE(border[2], tObj->BorderColor.f[2]);
306   CLAMPED_FLOAT_TO_UBYTE(border[3], tObj->BorderColor.f[3]);
307
308   state[I830_TEXREG_TM0S4] = PACK_COLOR_8888(border[3],
309					      border[0],
310					      border[1],
311					      border[2]);
312
313   I830_ACTIVESTATE(i830, I830_UPLOAD_TEX(unit), GL_TRUE);
314   /* memcmp was already disabled, but definitely won't work as the
315    * region might now change and that wouldn't be detected:
316    */
317   I830_STATECHANGE(i830, I830_UPLOAD_TEX(unit));
318   return GL_TRUE;
319}
320
321
322
323
324void
325i830UpdateTextureState(struct intel_context *intel)
326{
327   struct i830_context *i830 = i830_context(&intel->ctx);
328   GLboolean ok = GL_TRUE;
329   GLuint i;
330
331   for (i = 0; i < I830_TEX_UNITS && ok; i++) {
332      switch (intel->ctx.Texture.Unit[i]._ReallyEnabled) {
333      case TEXTURE_1D_BIT:
334      case TEXTURE_2D_BIT:
335      case TEXTURE_CUBE_BIT:
336         ok = i830_update_tex_unit(intel, i, TEXCOORDS_ARE_NORMAL);
337         break;
338      case TEXTURE_RECT_BIT:
339         ok = i830_update_tex_unit(intel, i, TEXCOORDS_ARE_IN_TEXELUNITS);
340         break;
341      case 0:{
342	 struct i830_context *i830 = i830_context(&intel->ctx);
343         if (i830->state.active & I830_UPLOAD_TEX(i))
344            I830_ACTIVESTATE(i830, I830_UPLOAD_TEX(i), GL_FALSE);
345
346	 if (i830->state.tex_buffer[i] != NULL) {
347	    drm_intel_bo_unreference(i830->state.tex_buffer[i]);
348	    i830->state.tex_buffer[i] = NULL;
349	 }
350         break;
351      }
352      case TEXTURE_3D_BIT:
353      default:
354         ok = GL_FALSE;
355         break;
356      }
357   }
358
359   FALLBACK(intel, I830_FALLBACK_TEXTURE, !ok);
360
361   if (ok)
362      i830EmitTextureBlend(i830);
363}
364