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 "pipe/p_context.h"
29 #include "pipe/p_state.h"
30 
31 #include "i915_state_inlines.h"
32 #include "i915_context.h"
33 #include "i915_reg.h"
34 #include "i915_state.h"
35 #include "i915_resource.h"
36 
37 
38 /*
39  * A note about min_lod & max_lod.
40  *
41  * There is a circular dependancy between the sampler state
42  * and the map state to be submitted to hw.
43  *
44  * Two condition must be meet:
45  * min_lod =< max_lod == true
46  * max_lod =< last_level == true
47  *
48  *
49  * This is all fine and dandy if it were for the fact that max_lod
50  * is set on the map state instead of the sampler state. That is
51  * the max_lod we submit on map is:
52  * max_lod = MIN2(last_level, max_lod);
53  *
54  * So we need to update the map state when we change samplers and
55  * we need to change the sampler state when map state is changed.
56  * The first part is done by calling update_texture in update_samplers
57  * and the second part is done else where in code tracking the state
58  * changes.
59  */
60 
61 static void update_map(struct i915_context *i915,
62                        uint unit,
63                        const struct i915_texture *tex,
64                        const struct i915_sampler_state *sampler,
65                        const struct pipe_sampler_view* view,
66                        uint state[2]);
67 
68 
69 
70 /***********************************************************************
71  * Samplers
72  */
73 
74 /**
75  * Compute i915 texture sampling state.
76  *
77  * Recalculate all state from scratch.  Perhaps not the most
78  * efficient, but this has gotten complex enough that we need
79  * something which is understandable and reliable.
80  * \param state  returns the 3 words of compute state
81  */
update_sampler(struct i915_context * i915,uint unit,const struct i915_sampler_state * sampler,const struct i915_texture * tex,unsigned state[3])82 static void update_sampler(struct i915_context *i915,
83                            uint unit,
84                            const struct i915_sampler_state *sampler,
85                            const struct i915_texture *tex,
86                            unsigned state[3])
87 {
88    const struct pipe_resource *pt = &tex->b.b;
89    unsigned minlod, lastlod;
90 
91    state[0] = sampler->state[0];
92    state[1] = sampler->state[1];
93    state[2] = sampler->state[2];
94 
95    if (pt->format == PIPE_FORMAT_UYVY ||
96        pt->format == PIPE_FORMAT_YUYV)
97       state[0] |= SS2_COLORSPACE_CONVERSION;
98 
99    /* 3D textures don't seem to respect the border color.
100     * Fallback if there's ever a danger that they might refer to
101     * it.
102     *
103     * Effectively this means fallback on 3D clamp or
104     * clamp_to_border.
105     *
106     * XXX: Check if this is true on i945.
107     * XXX: Check if this bug got fixed in release silicon.
108     */
109 #if 0
110    {
111       const unsigned ws = sampler->templ->wrap_s;
112       const unsigned wt = sampler->templ->wrap_t;
113       const unsigned wr = sampler->templ->wrap_r;
114       if (pt->target == PIPE_TEXTURE_3D &&
115           (sampler->templ->min_img_filter != PIPE_TEX_FILTER_NEAREST ||
116            sampler->templ->mag_img_filter != PIPE_TEX_FILTER_NEAREST) &&
117           (ws == PIPE_TEX_WRAP_CLAMP ||
118            wt == PIPE_TEX_WRAP_CLAMP ||
119            wr == PIPE_TEX_WRAP_CLAMP ||
120            ws == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
121            wt == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
122            wr == PIPE_TEX_WRAP_CLAMP_TO_BORDER)) {
123          if (i915->conformance_mode > 0) {
124             assert(0);
125             /*             sampler->fallback = true; */
126             /* TODO */
127          }
128       }
129    }
130 #endif
131 
132    /* See note at the top of file */
133    minlod = sampler->minlod;
134    lastlod = pt->last_level << 4;
135 
136    if (lastlod < minlod) {
137       minlod = lastlod;
138    }
139 
140    state[1] |= (sampler->minlod << SS3_MIN_LOD_SHIFT);
141    state[1] |= (unit << SS3_TEXTUREMAP_INDEX_SHIFT);
142 }
143 
update_samplers(struct i915_context * i915)144 static void update_samplers(struct i915_context *i915)
145 {
146    uint unit;
147 
148    i915->current.sampler_enable_nr = 0;
149    i915->current.sampler_enable_flags = 0x0;
150 
151    for (unit = 0; unit < i915->num_fragment_sampler_views && unit < i915->num_samplers;
152         unit++) {
153       /* determine unit enable/disable by looking for a bound texture */
154       /* could also examine the fragment program? */
155       if (i915->fragment_sampler_views[unit]) {
156          struct i915_texture *texture = i915_texture(i915->fragment_sampler_views[unit]->texture);
157 
158          update_sampler(i915,
159                         unit,
160                         i915->sampler[unit],          /* sampler state */
161                         texture,                      /* texture */
162                         i915->current.sampler[unit]); /* the result */
163          update_map(i915,
164                     unit,
165                     texture,                             /* texture */
166                     i915->sampler[unit],                 /* sampler state */
167                     i915->fragment_sampler_views[unit],  /* sampler view */
168                     i915->current.texbuffer[unit]);      /* the result */
169 
170          i915->current.sampler_enable_nr++;
171          i915->current.sampler_enable_flags |= (1 << unit);
172       }
173    }
174 
175    i915->hardware_dirty |= I915_HW_SAMPLER | I915_HW_MAP;
176 }
177 
178 struct i915_tracked_state i915_hw_samplers = {
179    "samplers",
180    update_samplers,
181    I915_NEW_SAMPLER | I915_NEW_SAMPLER_VIEW
182 };
183 
184 
185 /***********************************************************************
186  * Sampler views
187  */
188 
translate_texture_format(enum pipe_format pipeFormat,const struct pipe_sampler_view * view)189 static uint translate_texture_format(enum pipe_format pipeFormat,
190                                      const struct pipe_sampler_view* view)
191 {
192    if ( (view->swizzle_r != PIPE_SWIZZLE_RED ||
193          view->swizzle_g != PIPE_SWIZZLE_GREEN ||
194          view->swizzle_b != PIPE_SWIZZLE_BLUE ||
195          view->swizzle_a != PIPE_SWIZZLE_ALPHA ) &&
196          pipeFormat != PIPE_FORMAT_Z24_UNORM_S8_UINT &&
197          pipeFormat != PIPE_FORMAT_Z24X8_UNORM )
198       debug_printf("i915: unsupported texture swizzle for format %d\n", pipeFormat);
199 
200    switch (pipeFormat) {
201    case PIPE_FORMAT_L8_UNORM:
202       return MAPSURF_8BIT | MT_8BIT_L8;
203    case PIPE_FORMAT_I8_UNORM:
204       return MAPSURF_8BIT | MT_8BIT_I8;
205    case PIPE_FORMAT_A8_UNORM:
206       return MAPSURF_8BIT | MT_8BIT_A8;
207    case PIPE_FORMAT_L8A8_UNORM:
208       return MAPSURF_16BIT | MT_16BIT_AY88;
209    case PIPE_FORMAT_B5G6R5_UNORM:
210       return MAPSURF_16BIT | MT_16BIT_RGB565;
211    case PIPE_FORMAT_B5G5R5A1_UNORM:
212       return MAPSURF_16BIT | MT_16BIT_ARGB1555;
213    case PIPE_FORMAT_B4G4R4A4_UNORM:
214       return MAPSURF_16BIT | MT_16BIT_ARGB4444;
215    case PIPE_FORMAT_B10G10R10A2_UNORM:
216       return MAPSURF_32BIT | MT_32BIT_ARGB2101010;
217    case PIPE_FORMAT_B8G8R8A8_UNORM:
218    case PIPE_FORMAT_B8G8R8A8_SRGB:
219       return MAPSURF_32BIT | MT_32BIT_ARGB8888;
220    case PIPE_FORMAT_B8G8R8X8_UNORM:
221       return MAPSURF_32BIT | MT_32BIT_XRGB8888;
222    case PIPE_FORMAT_R8G8B8A8_UNORM:
223       return MAPSURF_32BIT | MT_32BIT_ABGR8888;
224    case PIPE_FORMAT_R8G8B8X8_UNORM:
225       return MAPSURF_32BIT | MT_32BIT_XBGR8888;
226    case PIPE_FORMAT_YUYV:
227       return (MAPSURF_422 | MT_422_YCRCB_NORMAL);
228    case PIPE_FORMAT_UYVY:
229       return (MAPSURF_422 | MT_422_YCRCB_SWAPY);
230 #if 0
231    case PIPE_FORMAT_RGB_FXT1:
232    case PIPE_FORMAT_RGBA_FXT1:
233       return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1);
234 #endif
235    case PIPE_FORMAT_Z16_UNORM:
236       return (MAPSURF_16BIT | MT_16BIT_L16);
237    case PIPE_FORMAT_DXT1_RGBA:
238    case PIPE_FORMAT_DXT1_RGB:
239       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
240    case PIPE_FORMAT_DXT3_RGBA:
241       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
242    case PIPE_FORMAT_DXT5_RGBA:
243       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
244    case PIPE_FORMAT_Z24_UNORM_S8_UINT:
245    case PIPE_FORMAT_Z24X8_UNORM:
246       {
247          if ( view->swizzle_r == PIPE_SWIZZLE_RED &&
248               view->swizzle_g == PIPE_SWIZZLE_RED &&
249               view->swizzle_b == PIPE_SWIZZLE_RED &&
250               view->swizzle_a == PIPE_SWIZZLE_ONE)
251             return (MAPSURF_32BIT | MT_32BIT_xA824);
252          if ( view->swizzle_r == PIPE_SWIZZLE_RED &&
253               view->swizzle_g == PIPE_SWIZZLE_RED &&
254               view->swizzle_b == PIPE_SWIZZLE_RED &&
255               view->swizzle_a == PIPE_SWIZZLE_RED)
256             return (MAPSURF_32BIT | MT_32BIT_xI824);
257          if ( view->swizzle_r == PIPE_SWIZZLE_ZERO &&
258               view->swizzle_g == PIPE_SWIZZLE_ZERO &&
259               view->swizzle_b == PIPE_SWIZZLE_ZERO &&
260               view->swizzle_a == PIPE_SWIZZLE_RED)
261             return (MAPSURF_32BIT | MT_32BIT_xL824);
262          debug_printf("i915: unsupported depth swizzle %d %d %d %d\n",
263                       view->swizzle_r,
264                       view->swizzle_g,
265                       view->swizzle_b,
266                       view->swizzle_a);
267          return (MAPSURF_32BIT | MT_32BIT_xL824);
268       }
269    default:
270       debug_printf("i915: translate_texture_format() bad image format %x\n",
271                    pipeFormat);
272       assert(0);
273       return 0;
274    }
275 }
276 
277 static inline uint32_t
ms3_tiling_bits(enum i915_winsys_buffer_tile tiling)278 ms3_tiling_bits(enum i915_winsys_buffer_tile tiling)
279 {
280          uint32_t tiling_bits = 0;
281 
282          switch (tiling) {
283          case I915_TILE_Y:
284             tiling_bits |= MS3_TILE_WALK_Y;
285          case I915_TILE_X:
286             tiling_bits |= MS3_TILED_SURFACE;
287          case I915_TILE_NONE:
288             break;
289          }
290 
291          return tiling_bits;
292 }
293 
update_map(struct i915_context * i915,uint unit,const struct i915_texture * tex,const struct i915_sampler_state * sampler,const struct pipe_sampler_view * view,uint state[2])294 static void update_map(struct i915_context *i915,
295                        uint unit,
296                        const struct i915_texture *tex,
297                        const struct i915_sampler_state *sampler,
298                        const struct pipe_sampler_view* view,
299                        uint state[2])
300 {
301    const struct pipe_resource *pt = &tex->b.b;
302    uint format, pitch;
303    const uint width = pt->width0, height = pt->height0, depth = pt->depth0;
304    const uint num_levels = pt->last_level;
305    unsigned max_lod = num_levels * 4;
306 
307    assert(tex);
308    assert(width);
309    assert(height);
310    assert(depth);
311 
312    format = translate_texture_format(pt->format, view);
313    i915->current.sampler_srgb[unit] = ( pt->format == PIPE_FORMAT_B8G8R8A8_SRGB ||
314                                         pt->format == PIPE_FORMAT_L8_SRGB );
315    pitch = tex->stride;
316 
317    assert(format);
318    assert(pitch);
319 
320    /* MS3 state */
321    state[0] =
322       (((height - 1) << MS3_HEIGHT_SHIFT)
323        | ((width - 1) << MS3_WIDTH_SHIFT)
324        | format
325        | ms3_tiling_bits(tex->tiling));
326 
327    /*
328     * XXX When min_filter != mag_filter and there's just one mipmap level,
329     * set max_lod = 1 to make sure i915 chooses between min/mag filtering.
330     */
331 
332    /* See note at the top of file */
333    if (max_lod > (sampler->maxlod >> 2))
334       max_lod = sampler->maxlod >> 2;
335 
336    /* MS4 state */
337    state[1] =
338       ((((pitch / 4) - 1) << MS4_PITCH_SHIFT)
339        | MS4_CUBE_FACE_ENA_MASK
340        | ((max_lod) << MS4_MAX_LOD_SHIFT)
341        | ((depth - 1) << MS4_VOLUME_DEPTH_SHIFT));
342 }
343 
update_maps(struct i915_context * i915)344 static void update_maps(struct i915_context *i915)
345 {
346    uint unit;
347 
348    for (unit = 0; unit < i915->num_fragment_sampler_views && unit < i915->num_samplers;
349         unit++) {
350       /* determine unit enable/disable by looking for a bound texture */
351       /* could also examine the fragment program? */
352       if (i915->fragment_sampler_views[unit]) {
353          struct i915_texture *texture = i915_texture(i915->fragment_sampler_views[unit]->texture);
354 
355          update_map(i915,
356                     unit,
357                     texture,                            /* texture */
358                     i915->sampler[unit],                /* sampler state */
359                     i915->fragment_sampler_views[unit], /* sampler view */
360                     i915->current.texbuffer[unit]);
361       }
362    }
363 
364    i915->hardware_dirty |= I915_HW_MAP;
365 }
366 
367 struct i915_tracked_state i915_hw_sampler_views = {
368    "sampler_views",
369    update_maps,
370    I915_NEW_SAMPLER_VIEW
371 };
372