1 /**************************************************************************
2  *
3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
4  * All Rights Reserved.
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8  * "Software"), to deal in the Software without restriction, including
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11  * permit persons to whom the Software is furnished to do so, subject to
12  * the following conditions:
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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.
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18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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26  **************************************************************************/
27 
28 #include "i915_batch.h"
29 #include "i915_state_inlines.h"
30 #include "i915_context.h"
31 #include "i915_reg.h"
32 #include "i915_state.h"
33 
34 #include "util/u_memory.h"
35 #include "util/u_pack_color.h"
36 
37 
38 /* State that we have chosen to store in the DYNAMIC segment of the
39  * i915 indirect state mechanism.
40  *
41  * Can't cache these in the way we do the static state, as there is no
42  * start/size in the command packet, instead an 'end' value that gets
43  * incremented.
44  *
45  * Additionally, there seems to be a requirement to re-issue the full
46  * (active) state every time a 4kb boundary is crossed.
47  */
48 
set_dynamic(struct i915_context * i915,unsigned offset,const unsigned state)49 static INLINE void set_dynamic(struct i915_context *i915,
50                                unsigned offset,
51                                const unsigned state)
52 {
53    if (i915->current.dynamic[offset] == state)
54       return;
55 
56    i915->current.dynamic[offset] = state;
57    i915->dynamic_dirty |= 1 << offset;
58    i915->hardware_dirty |= I915_HW_DYNAMIC;
59 }
60 
61 
62 
set_dynamic_array(struct i915_context * i915,unsigned offset,const unsigned * src,unsigned dwords)63 static INLINE void set_dynamic_array(struct i915_context *i915,
64                                      unsigned offset,
65                                      const unsigned *src,
66                                      unsigned dwords)
67 {
68    unsigned i;
69 
70    if (!memcmp(src, &i915->current.dynamic[offset], dwords * 4))
71       return;
72 
73    for (i = 0; i < dwords; i++) {
74       i915->current.dynamic[offset + i] = src[i];
75       i915->dynamic_dirty |= 1 << (offset + i);
76    }
77 
78    i915->hardware_dirty |= I915_HW_DYNAMIC;
79 }
80 
81 
82 
83 /***********************************************************************
84  * Modes4: stencil masks and logicop
85  */
upload_MODES4(struct i915_context * i915)86 static void upload_MODES4(struct i915_context *i915)
87 {
88    unsigned modes4 = 0;
89 
90    /* I915_NEW_STENCIL
91     */
92    modes4 |= i915->depth_stencil->stencil_modes4;
93 
94    /* I915_NEW_BLEND
95      */
96    modes4 |= i915->blend->modes4;
97 
98    set_dynamic(i915, I915_DYNAMIC_MODES4, modes4);
99 }
100 
101 const struct i915_tracked_state i915_upload_MODES4 = {
102    "MODES4",
103    upload_MODES4,
104    I915_NEW_BLEND | I915_NEW_DEPTH_STENCIL
105 };
106 
107 
108 
109 /***********************************************************************
110  */
upload_BFO(struct i915_context * i915)111 static void upload_BFO(struct i915_context *i915)
112 {
113    unsigned bfo[2];
114    bfo[0] = i915->depth_stencil->bfo[0];
115    bfo[1] = i915->depth_stencil->bfo[1];
116    /* I don't get it only allowed to set a ref mask when the enable bit is set? */
117    if (bfo[0] & BFO_ENABLE_STENCIL_REF) {
118       bfo[0] |= i915->stencil_ref.ref_value[1] << BFO_STENCIL_REF_SHIFT;
119    }
120 
121    set_dynamic_array(i915, I915_DYNAMIC_BFO_0, bfo, 2);
122 }
123 
124 const struct i915_tracked_state i915_upload_BFO = {
125    "BFO",
126    upload_BFO,
127    I915_NEW_DEPTH_STENCIL
128 };
129 
130 
131 
132 /***********************************************************************
133  */
upload_BLENDCOLOR(struct i915_context * i915)134 static void upload_BLENDCOLOR(struct i915_context *i915)
135 {
136    unsigned bc[2];
137 
138    memset(bc, 0, sizeof(bc));
139 
140    /* I915_NEW_BLEND
141     */
142    {
143       const float *color = i915->blend_color.color;
144 
145       bc[0] = _3DSTATE_CONST_BLEND_COLOR_CMD;
146       bc[1] = pack_ui32_float4(color[0],
147                                color[1],
148                                color[2],
149                                color[3]);
150    }
151 
152    set_dynamic_array(i915, I915_DYNAMIC_BC_0, bc, 2);
153 }
154 
155 const struct i915_tracked_state i915_upload_BLENDCOLOR = {
156    "BLENDCOLOR",
157    upload_BLENDCOLOR,
158    I915_NEW_BLEND
159 };
160 
161 
162 
163 /***********************************************************************
164  */
upload_IAB(struct i915_context * i915)165 static void upload_IAB(struct i915_context *i915)
166 {
167    unsigned iab = i915->blend->iab;
168 
169    set_dynamic(i915, I915_DYNAMIC_IAB, iab);
170 }
171 
172 const struct i915_tracked_state i915_upload_IAB = {
173    "IAB",
174    upload_IAB,
175    I915_NEW_BLEND
176 };
177 
178 
179 
180 /***********************************************************************
181  */
upload_DEPTHSCALE(struct i915_context * i915)182 static void upload_DEPTHSCALE(struct i915_context *i915)
183 {
184    set_dynamic_array(i915, I915_DYNAMIC_DEPTHSCALE_0,
185                      &i915->rasterizer->ds[0].u, 2);
186 }
187 
188 const struct i915_tracked_state i915_upload_DEPTHSCALE = {
189    "DEPTHSCALE",
190    upload_DEPTHSCALE,
191    I915_NEW_RASTERIZER
192 };
193 
194 
195 
196 /***********************************************************************
197  * Polygon stipple
198  *
199  * The i915 supports a 4x4 stipple natively, GL wants 32x32.
200  * Fortunately stipple is usually a repeating pattern.
201  *
202  * XXX: does stipple pattern need to be adjusted according to
203  * the window position?
204  *
205  * XXX: possibly need workaround for conform paths test.
206  */
upload_STIPPLE(struct i915_context * i915)207 static void upload_STIPPLE(struct i915_context *i915)
208 {
209    unsigned st[2];
210 
211    st[0] = _3DSTATE_STIPPLE;
212    st[1] = 0;
213 
214    /* I915_NEW_RASTERIZER
215     */
216    st[1] |= i915->rasterizer->st;
217 
218    /* I915_NEW_STIPPLE
219     */
220    {
221       const ubyte *mask = (const ubyte *)i915->poly_stipple.stipple;
222       ubyte p[4];
223 
224       p[0] = mask[12] & 0xf;
225       p[1] = mask[8] & 0xf;
226       p[2] = mask[4] & 0xf;
227       p[3] = mask[0] & 0xf;
228 
229       /* Not sure what to do about fallbacks, so for now just dont:
230        */
231       st[1] |= ((p[0] << 0) |
232                 (p[1] << 4) |
233                 (p[2] << 8) |
234                 (p[3] << 12));
235    }
236 
237    set_dynamic_array(i915, I915_DYNAMIC_STP_0, st, 2);
238 }
239 
240 const struct i915_tracked_state i915_upload_STIPPLE = {
241    "STIPPLE",
242    upload_STIPPLE,
243    I915_NEW_RASTERIZER | I915_NEW_STIPPLE
244 };
245 
246 
247 
248 /***********************************************************************
249  * Scissor enable
250  */
upload_SCISSOR_ENABLE(struct i915_context * i915)251 static void upload_SCISSOR_ENABLE( struct i915_context *i915 )
252 {
253    set_dynamic(i915, I915_DYNAMIC_SC_ENA_0, i915->rasterizer->sc[0]);
254 }
255 
256 const struct i915_tracked_state i915_upload_SCISSOR_ENABLE = {
257    "SCISSOR ENABLE",
258    upload_SCISSOR_ENABLE,
259    I915_NEW_RASTERIZER
260 };
261 
262 
263 
264 /***********************************************************************
265  * Scissor rect
266  */
upload_SCISSOR_RECT(struct i915_context * i915)267 static void upload_SCISSOR_RECT(struct i915_context *i915)
268 {
269    unsigned x1 = i915->scissor.minx;
270    unsigned y1 = i915->scissor.miny;
271    unsigned x2 = i915->scissor.maxx - 1;
272    unsigned y2 = i915->scissor.maxy - 1;
273    unsigned sc[3];
274 
275    sc[0] = _3DSTATE_SCISSOR_RECT_0_CMD;
276    sc[1] = (y1 << 16) | (x1 & 0xffff);
277    sc[2] = (y2 << 16) | (x2 & 0xffff);
278 
279    set_dynamic_array(i915, I915_DYNAMIC_SC_RECT_0, sc, 3);
280 }
281 
282 const struct i915_tracked_state i915_upload_SCISSOR_RECT = {
283    "SCISSOR RECT",
284    upload_SCISSOR_RECT,
285    I915_NEW_SCISSOR
286 };
287 
288 
289 
290 /***********************************************************************
291  */
292 static const struct i915_tracked_state *atoms[] = {
293    &i915_upload_MODES4,
294    &i915_upload_BFO,
295    &i915_upload_BLENDCOLOR,
296    &i915_upload_IAB,
297    &i915_upload_DEPTHSCALE,
298    &i915_upload_STIPPLE,
299    &i915_upload_SCISSOR_ENABLE,
300    &i915_upload_SCISSOR_RECT
301 };
302 
303 /* These will be dynamic indirect state commands, but for now just end
304  * up on the batch buffer with everything else.
305  */
update_dynamic(struct i915_context * i915)306 static void update_dynamic(struct i915_context *i915)
307 {
308    int i;
309 
310    for (i = 0; i < Elements(atoms); i++)
311       if (i915->dirty & atoms[i]->dirty)
312          atoms[i]->update(i915);
313 }
314 
315 struct i915_tracked_state i915_hw_dynamic = {
316    "dynamic",
317    update_dynamic,
318    ~0 /* all state atoms, becuase we do internal checking */
319 };
320