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#include "main/samplerobj.h"
33
34#include "intel_mipmap_tree.h"
35#include "intel_tex.h"
36
37#include "i830_context.h"
38#include "i830_reg.h"
39#include "intel_chipset.h"
40
41
42static GLuint
43translate_texture_format(GLuint mesa_format)
44{
45   switch (mesa_format) {
46   case MESA_FORMAT_L8:
47      return MAPSURF_8BIT | MT_8BIT_L8;
48   case MESA_FORMAT_I8:
49      return MAPSURF_8BIT | MT_8BIT_I8;
50   case MESA_FORMAT_A8:
51      return MAPSURF_8BIT | MT_8BIT_I8; /* Kludge! */
52   case MESA_FORMAT_AL88:
53      return MAPSURF_16BIT | MT_16BIT_AY88;
54   case MESA_FORMAT_RGB565:
55      return MAPSURF_16BIT | MT_16BIT_RGB565;
56   case MESA_FORMAT_ARGB1555:
57      return MAPSURF_16BIT | MT_16BIT_ARGB1555;
58   case MESA_FORMAT_ARGB4444:
59      return MAPSURF_16BIT | MT_16BIT_ARGB4444;
60   case MESA_FORMAT_ARGB8888:
61      return MAPSURF_32BIT | MT_32BIT_ARGB8888;
62   case MESA_FORMAT_XRGB8888:
63      return MAPSURF_32BIT | MT_32BIT_XRGB8888;
64   case MESA_FORMAT_YCBCR_REV:
65      return (MAPSURF_422 | MT_422_YCRCB_NORMAL);
66   case MESA_FORMAT_YCBCR:
67      return (MAPSURF_422 | MT_422_YCRCB_SWAPY);
68   case MESA_FORMAT_RGB_FXT1:
69   case MESA_FORMAT_RGBA_FXT1:
70      return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1);
71   case MESA_FORMAT_RGBA_DXT1:
72   case MESA_FORMAT_RGB_DXT1:
73      return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
74   case MESA_FORMAT_RGBA_DXT3:
75      return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
76   case MESA_FORMAT_RGBA_DXT5:
77      return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
78   default:
79      fprintf(stderr, "%s: bad image format %s\n", __FUNCTION__,
80	      _mesa_get_format_name(mesa_format));
81      abort();
82      return 0;
83   }
84}
85
86
87
88
89/* The i915 (and related graphics cores) do not support GL_CLAMP.  The
90 * Intel drivers for "other operating systems" implement GL_CLAMP as
91 * GL_CLAMP_TO_EDGE, so the same is done here.
92 */
93static GLuint
94translate_wrap_mode(GLenum wrap)
95{
96   switch (wrap) {
97   case GL_REPEAT:
98      return TEXCOORDMODE_WRAP;
99   case GL_CLAMP:
100   case GL_CLAMP_TO_EDGE:
101      return TEXCOORDMODE_CLAMP;        /* not really correct */
102   case GL_CLAMP_TO_BORDER:
103      return TEXCOORDMODE_CLAMP_BORDER;
104   case GL_MIRRORED_REPEAT:
105      return TEXCOORDMODE_MIRROR;
106   default:
107      return TEXCOORDMODE_WRAP;
108   }
109}
110
111
112/* Recalculate all state from scratch.  Perhaps not the most
113 * efficient, but this has gotten complex enough that we need
114 * something which is understandable and reliable.
115 */
116static bool
117i830_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
118{
119   struct gl_context *ctx = &intel->ctx;
120   struct i830_context *i830 = i830_context(ctx);
121   struct gl_texture_unit *tUnit = &ctx->Texture.Unit[unit];
122   struct gl_texture_object *tObj = tUnit->_Current;
123   struct intel_texture_object *intelObj = intel_texture_object(tObj);
124   struct gl_texture_image *firstImage;
125   struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
126   GLuint *state = i830->state.Tex[unit], format, pitch;
127   GLint lodbias;
128   GLubyte border[4];
129   GLuint dst_x, dst_y;
130
131   memset(state, 0, sizeof(*state));
132
133   /*We need to refcount these. */
134
135   if (i830->state.tex_buffer[unit] != NULL) {
136       drm_intel_bo_unreference(i830->state.tex_buffer[unit]);
137       i830->state.tex_buffer[unit] = NULL;
138   }
139
140   if (!intel_finalize_mipmap_tree(intel, unit))
141      return false;
142
143   /* Get first image here, since intelObj->firstLevel will get set in
144    * the intel_finalize_mipmap_tree() call above.
145    */
146   firstImage = tObj->Image[0][tObj->BaseLevel];
147
148   intel_miptree_get_image_offset(intelObj->mt, tObj->BaseLevel, 0, 0,
149				  &dst_x, &dst_y);
150
151   drm_intel_bo_reference(intelObj->mt->region->bo);
152   i830->state.tex_buffer[unit] = intelObj->mt->region->bo;
153   pitch = intelObj->mt->region->pitch * intelObj->mt->cpp;
154
155   /* XXX: This calculation is probably broken for tiled images with
156    * a non-page-aligned offset.
157    */
158   i830->state.tex_offset[unit] = dst_x * intelObj->mt->cpp + dst_y * pitch;
159
160   format = translate_texture_format(firstImage->TexFormat);
161
162   state[I830_TEXREG_TM0LI] = (_3DSTATE_LOAD_STATE_IMMEDIATE_2 |
163                               (LOAD_TEXTURE_MAP0 << unit) | 4);
164
165   state[I830_TEXREG_TM0S1] =
166      (((firstImage->Height - 1) << TM0S1_HEIGHT_SHIFT) |
167       ((firstImage->Width - 1) << TM0S1_WIDTH_SHIFT) | format);
168
169   if (intelObj->mt->region->tiling != I915_TILING_NONE) {
170      state[I830_TEXREG_TM0S1] |= TM0S1_TILED_SURFACE;
171      if (intelObj->mt->region->tiling == I915_TILING_Y)
172	 state[I830_TEXREG_TM0S1] |= TM0S1_TILE_WALK;
173   }
174
175   state[I830_TEXREG_TM0S2] =
176      ((((pitch / 4) - 1) << TM0S2_PITCH_SHIFT) | TM0S2_CUBE_FACE_ENA_MASK);
177
178   {
179      if (tObj->Target == GL_TEXTURE_CUBE_MAP)
180         state[I830_TEXREG_CUBE] = (_3DSTATE_MAP_CUBE | MAP_UNIT(unit) |
181                                    CUBE_NEGX_ENABLE |
182                                    CUBE_POSX_ENABLE |
183                                    CUBE_NEGY_ENABLE |
184                                    CUBE_POSY_ENABLE |
185                                    CUBE_NEGZ_ENABLE | CUBE_POSZ_ENABLE);
186      else
187         state[I830_TEXREG_CUBE] = (_3DSTATE_MAP_CUBE | MAP_UNIT(unit));
188   }
189
190
191
192
193   {
194      GLuint minFilt, mipFilt, magFilt;
195      float maxlod;
196      uint32_t minlod_fixed, maxlod_fixed;
197
198      switch (sampler->MinFilter) {
199      case GL_NEAREST:
200         minFilt = FILTER_NEAREST;
201         mipFilt = MIPFILTER_NONE;
202         break;
203      case GL_LINEAR:
204         minFilt = FILTER_LINEAR;
205         mipFilt = MIPFILTER_NONE;
206         break;
207      case GL_NEAREST_MIPMAP_NEAREST:
208         minFilt = FILTER_NEAREST;
209         mipFilt = MIPFILTER_NEAREST;
210         break;
211      case GL_LINEAR_MIPMAP_NEAREST:
212         minFilt = FILTER_LINEAR;
213         mipFilt = MIPFILTER_NEAREST;
214         break;
215      case GL_NEAREST_MIPMAP_LINEAR:
216         minFilt = FILTER_NEAREST;
217         mipFilt = MIPFILTER_LINEAR;
218         break;
219      case GL_LINEAR_MIPMAP_LINEAR:
220         minFilt = FILTER_LINEAR;
221         mipFilt = MIPFILTER_LINEAR;
222         break;
223      default:
224         return false;
225      }
226
227      if (sampler->MaxAnisotropy > 1.0) {
228         minFilt = FILTER_ANISOTROPIC;
229         magFilt = FILTER_ANISOTROPIC;
230      }
231      else {
232         switch (sampler->MagFilter) {
233         case GL_NEAREST:
234            magFilt = FILTER_NEAREST;
235            break;
236         case GL_LINEAR:
237            magFilt = FILTER_LINEAR;
238            break;
239         default:
240            return false;
241         }
242      }
243
244      lodbias = (int) ((tUnit->LodBias + sampler->LodBias) * 16.0);
245      if (lodbias < -64)
246          lodbias = -64;
247      if (lodbias > 63)
248          lodbias = 63;
249
250      state[I830_TEXREG_TM0S3] = ((lodbias << TM0S3_LOD_BIAS_SHIFT) &
251                                  TM0S3_LOD_BIAS_MASK);
252#if 0
253      /* YUV conversion:
254       */
255      if (firstImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR ||
256          firstImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR_REV)
257         state[I830_TEXREG_TM0S3] |= SS2_COLORSPACE_CONVERSION;
258#endif
259
260      /* We get one field with fraction bits for the maximum
261       * addressable (smallest resolution) LOD.  Use it to cover both
262       * MAX_LEVEL and MAX_LOD.
263       */
264      minlod_fixed = U_FIXED(CLAMP(sampler->MinLod, 0.0, 11), 4);
265      maxlod = MIN2(sampler->MaxLod, tObj->_MaxLevel - tObj->BaseLevel);
266      if (intel->intelScreen->deviceID == PCI_CHIP_I855_GM ||
267	  intel->intelScreen->deviceID == PCI_CHIP_I865_G) {
268	 maxlod_fixed = U_FIXED(CLAMP(maxlod, 0.0, 11.75), 2);
269	 maxlod_fixed = MAX2(maxlod_fixed, (minlod_fixed + 3) >> 2);
270	 state[I830_TEXREG_TM0S3] |= maxlod_fixed << TM0S3_MIN_MIP_SHIFT;
271	 state[I830_TEXREG_TM0S2] |= TM0S2_LOD_PRECLAMP;
272      } else {
273	 maxlod_fixed = U_FIXED(CLAMP(maxlod, 0.0, 11), 0);
274	 maxlod_fixed = MAX2(maxlod_fixed, (minlod_fixed + 15) >> 4);
275	 state[I830_TEXREG_TM0S3] |= maxlod_fixed << TM0S3_MIN_MIP_SHIFT_830;
276      }
277      state[I830_TEXREG_TM0S3] |= minlod_fixed << TM0S3_MAX_MIP_SHIFT;
278      state[I830_TEXREG_TM0S3] |= ((minFilt << TM0S3_MIN_FILTER_SHIFT) |
279                                   (mipFilt << TM0S3_MIP_FILTER_SHIFT) |
280                                   (magFilt << TM0S3_MAG_FILTER_SHIFT));
281   }
282
283   {
284      GLenum ws = sampler->WrapS;
285      GLenum wt = sampler->WrapT;
286
287
288      /* 3D textures not available on i830
289       */
290      if (tObj->Target == GL_TEXTURE_3D)
291         return false;
292
293      state[I830_TEXREG_MCS] = (_3DSTATE_MAP_COORD_SET_CMD |
294                                MAP_UNIT(unit) |
295                                ENABLE_TEXCOORD_PARAMS |
296                                ss3 |
297                                ENABLE_ADDR_V_CNTL |
298                                TEXCOORD_ADDR_V_MODE(translate_wrap_mode(wt))
299                                | ENABLE_ADDR_U_CNTL |
300                                TEXCOORD_ADDR_U_MODE(translate_wrap_mode
301                                                     (ws)));
302   }
303
304   /* convert border color from float to ubyte */
305   CLAMPED_FLOAT_TO_UBYTE(border[0], sampler->BorderColor.f[0]);
306   CLAMPED_FLOAT_TO_UBYTE(border[1], sampler->BorderColor.f[1]);
307   CLAMPED_FLOAT_TO_UBYTE(border[2], sampler->BorderColor.f[2]);
308   CLAMPED_FLOAT_TO_UBYTE(border[3], sampler->BorderColor.f[3]);
309
310   state[I830_TEXREG_TM0S4] = PACK_COLOR_8888(border[3],
311					      border[0],
312					      border[1],
313					      border[2]);
314
315   I830_ACTIVESTATE(i830, I830_UPLOAD_TEX(unit), true);
316   /* memcmp was already disabled, but definitely won't work as the
317    * region might now change and that wouldn't be detected:
318    */
319   I830_STATECHANGE(i830, I830_UPLOAD_TEX(unit));
320   return true;
321}
322
323
324
325
326void
327i830UpdateTextureState(struct intel_context *intel)
328{
329   struct i830_context *i830 = i830_context(&intel->ctx);
330   bool ok = true;
331   GLuint i;
332
333   for (i = 0; i < I830_TEX_UNITS && ok; i++) {
334      switch (intel->ctx.Texture.Unit[i]._ReallyEnabled) {
335      case TEXTURE_1D_BIT:
336      case TEXTURE_2D_BIT:
337      case TEXTURE_CUBE_BIT:
338         ok = i830_update_tex_unit(intel, i, TEXCOORDS_ARE_NORMAL);
339         break;
340      case TEXTURE_RECT_BIT:
341         ok = i830_update_tex_unit(intel, i, TEXCOORDS_ARE_IN_TEXELUNITS);
342         break;
343      case 0:{
344	 struct i830_context *i830 = i830_context(&intel->ctx);
345         if (i830->state.active & I830_UPLOAD_TEX(i))
346            I830_ACTIVESTATE(i830, I830_UPLOAD_TEX(i), false);
347
348	 if (i830->state.tex_buffer[i] != NULL) {
349	    drm_intel_bo_unreference(i830->state.tex_buffer[i]);
350	    i830->state.tex_buffer[i] = NULL;
351	 }
352         break;
353      }
354      case TEXTURE_3D_BIT:
355      default:
356         ok = false;
357         break;
358      }
359   }
360
361   FALLBACK(intel, I830_FALLBACK_TEXTURE, !ok);
362
363   if (ok)
364      i830EmitTextureBlend(i830);
365}
366