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 "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_L_UNORM8:
47      return MAPSURF_8BIT | MT_8BIT_L8;
48   case MESA_FORMAT_I_UNORM8:
49      return MAPSURF_8BIT | MT_8BIT_I8;
50   case MESA_FORMAT_LA_UNORM8:
51      return MAPSURF_16BIT | MT_16BIT_AY88;
52   case MESA_FORMAT_B5G6R5_UNORM:
53      return MAPSURF_16BIT | MT_16BIT_RGB565;
54   case MESA_FORMAT_B5G5R5A1_UNORM:
55      return MAPSURF_16BIT | MT_16BIT_ARGB1555;
56   case MESA_FORMAT_B4G4R4A4_UNORM:
57      return MAPSURF_16BIT | MT_16BIT_ARGB4444;
58   case MESA_FORMAT_B8G8R8A8_UNORM:
59      return MAPSURF_32BIT | MT_32BIT_ARGB8888;
60   case MESA_FORMAT_B8G8R8X8_UNORM:
61      return MAPSURF_32BIT | MT_32BIT_XRGB8888;
62   case MESA_FORMAT_YCBCR_REV:
63      return (MAPSURF_422 | MT_422_YCRCB_NORMAL);
64   case MESA_FORMAT_YCBCR:
65      return (MAPSURF_422 | MT_422_YCRCB_SWAPY);
66   case MESA_FORMAT_RGB_FXT1:
67   case MESA_FORMAT_RGBA_FXT1:
68      return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1);
69   case MESA_FORMAT_RGBA_DXT1:
70   case MESA_FORMAT_RGB_DXT1:
71      return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
72   case MESA_FORMAT_RGBA_DXT3:
73      return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
74   case MESA_FORMAT_RGBA_DXT5:
75      return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
76   default:
77      fprintf(stderr, "%s: bad image format %s\n", __func__,
78	      _mesa_get_format_name(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 bool
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   struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
124   GLuint *state = i830->state.Tex[unit], format, pitch;
125   GLint lodbias;
126   GLubyte border[4];
127   GLuint dst_x, dst_y;
128
129   memset(state, 0, sizeof(*state));
130
131   /*We need to refcount these. */
132
133   if (i830->state.tex_buffer[unit] != NULL) {
134       drm_intel_bo_unreference(i830->state.tex_buffer[unit]);
135       i830->state.tex_buffer[unit] = NULL;
136   }
137
138   if (!intel_finalize_mipmap_tree(intel, unit))
139      return false;
140
141   /* Get first image here, since intelObj->firstLevel will get set in
142    * the intel_finalize_mipmap_tree() call above.
143    */
144   firstImage = tObj->Image[0][tObj->Attrib.BaseLevel];
145
146   intel_miptree_get_image_offset(intelObj->mt, tObj->Attrib.BaseLevel, 0,
147				  &dst_x, &dst_y);
148
149   drm_intel_bo_reference(intelObj->mt->region->bo);
150   i830->state.tex_buffer[unit] = intelObj->mt->region->bo;
151   pitch = intelObj->mt->region->pitch;
152
153   /* XXX: This calculation is probably broken for tiled images with
154    * a non-page-aligned offset.
155    */
156   i830->state.tex_offset[unit] = dst_x * intelObj->mt->cpp + dst_y * pitch;
157
158   format = translate_texture_format(firstImage->TexFormat);
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 (sampler->Attrib.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 false;
223      }
224
225      if (sampler->Attrib.MaxAnisotropy > 1.0) {
226         minFilt = FILTER_ANISOTROPIC;
227         magFilt = FILTER_ANISOTROPIC;
228         /* no trilinear + anisotropic */
229         mipFilt = MIPFILTER_NEAREST;
230      }
231      else {
232         switch (sampler->Attrib.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->Attrib.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->Attrib.MinLod, 0.0, 11), 4);
265      maxlod = MIN2(sampler->Attrib.MaxLod, tObj->_MaxLevel - tObj->Attrib.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->Attrib.WrapS;
285      GLenum wt = sampler->Attrib.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->Attrib.state.border_color.f[0]);
306   CLAMPED_FLOAT_TO_UBYTE(border[1], sampler->Attrib.state.border_color.f[1]);
307   CLAMPED_FLOAT_TO_UBYTE(border[2], sampler->Attrib.state.border_color.f[2]);
308   CLAMPED_FLOAT_TO_UBYTE(border[3], sampler->Attrib.state.border_color.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      if (intel->ctx.Texture.Unit[i]._Current) {
335         switch (intel->ctx.Texture.Unit[i]._Current->Target) {
336         case GL_TEXTURE_1D:
337         case GL_TEXTURE_2D:
338         case GL_TEXTURE_CUBE_MAP:
339            ok = i830_update_tex_unit(intel, i, TEXCOORDS_ARE_NORMAL);
340            break;
341         case GL_TEXTURE_RECTANGLE:
342            ok = i830_update_tex_unit(intel, i, TEXCOORDS_ARE_IN_TEXELUNITS);
343            break;
344         case GL_TEXTURE_3D:
345         default:
346            ok = false;
347            break;
348         }
349      } else {
350         struct i830_context *i830 = i830_context(&intel->ctx);
351         if (i830->state.active & I830_UPLOAD_TEX(i))
352            I830_ACTIVESTATE(i830, I830_UPLOAD_TEX(i), false);
353
354         if (i830->state.tex_buffer[i] != NULL) {
355            drm_intel_bo_unreference(i830->state.tex_buffer[i]);
356            i830->state.tex_buffer[i] = NULL;
357         }
358      }
359   }
360
361   FALLBACK(intel, I830_FALLBACK_TEXTURE, !ok);
362
363   if (ok)
364      i830EmitTextureBlend(i830);
365}
366