i965: Handle swizzles in the addition of YUV texture constants.
[mesa.git] / src / mesa / drivers / dri / i965 / brw_clip.c
1 /*
2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
5
6 Permission is hereby granted, free of charge, to any person obtaining
7 a 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, sublicense, 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
16 portions of the Software.
17
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25
26 **********************************************************************/
27 /*
28 * Authors:
29 * Keith Whitwell <keith@tungstengraphics.com>
30 */
31
32 #include "main/glheader.h"
33 #include "main/macros.h"
34 #include "main/enums.h"
35
36 #include "intel_batchbuffer.h"
37
38 #include "brw_defines.h"
39 #include "brw_context.h"
40 #include "brw_eu.h"
41 #include "brw_util.h"
42 #include "brw_state.h"
43 #include "brw_clip.h"
44
45 #define FRONT_UNFILLED_BIT 0x1
46 #define BACK_UNFILLED_BIT 0x2
47
48
49 static void compile_clip_prog( struct brw_context *brw,
50 struct brw_clip_prog_key *key )
51 {
52 struct intel_context *intel = &brw->intel;
53 struct brw_clip_compile c;
54 const GLuint *program;
55 GLuint program_size;
56 GLuint delta;
57 GLuint i;
58 GLuint header_regs;
59
60 memset(&c, 0, sizeof(c));
61
62 /* Begin the compilation:
63 */
64 brw_init_compile(brw, &c.func);
65
66 c.func.single_program_flow = 1;
67
68 c.key = *key;
69
70 /* Need to locate the two positions present in vertex + header.
71 * These are currently hardcoded:
72 */
73 c.header_position_offset = ATTR_SIZE;
74
75 if (intel->gen == 5)
76 header_regs = 3;
77 else
78 header_regs = 1;
79
80 delta = header_regs * REG_SIZE;
81
82 for (i = 0; i < VERT_RESULT_MAX; i++) {
83 if (c.key.attrs & BITFIELD64_BIT(i)) {
84 c.offset[i] = delta;
85 delta += ATTR_SIZE;
86
87 c.idx_to_attr[c.nr_attrs] = i;
88 c.nr_attrs++;
89 }
90 }
91
92 /* The vertex attributes start at a URB row-aligned offset after
93 * the 8-20 dword vertex header, and continue for a URB row-aligned
94 * length. nr_regs determines the urb_read_length from the start
95 * of the header to the end of the vertex data.
96 */
97 c.nr_regs = header_regs + (c.nr_attrs + 1) / 2;
98
99 c.nr_bytes = c.nr_regs * REG_SIZE;
100
101 c.prog_data.clip_mode = c.key.clip_mode; /* XXX */
102
103 /* For some reason the thread is spawned with only 4 channels
104 * unmasked.
105 */
106 brw_set_mask_control(&c.func, BRW_MASK_DISABLE);
107
108
109 /* Would ideally have the option of producing a program which could
110 * do all three:
111 */
112 switch (key->primitive) {
113 case GL_TRIANGLES:
114 if (key->do_unfilled)
115 brw_emit_unfilled_clip( &c );
116 else
117 brw_emit_tri_clip( &c );
118 break;
119 case GL_LINES:
120 brw_emit_line_clip( &c );
121 break;
122 case GL_POINTS:
123 brw_emit_point_clip( &c );
124 break;
125 default:
126 assert(0);
127 return;
128 }
129
130
131
132 /* get the program
133 */
134 program = brw_get_program(&c.func, &program_size);
135
136 if (INTEL_DEBUG & DEBUG_CLIP) {
137 printf("clip:\n");
138 for (i = 0; i < program_size / sizeof(struct brw_instruction); i++)
139 brw_disasm(stdout, &((struct brw_instruction *)program)[i],
140 intel->gen);
141 printf("\n");
142 }
143
144 /* Upload
145 */
146 drm_intel_bo_unreference(brw->clip.prog_bo);
147 brw->clip.prog_bo = brw_upload_cache_with_auxdata(&brw->cache,
148 BRW_CLIP_PROG,
149 &c.key, sizeof(c.key),
150 NULL, 0,
151 program, program_size,
152 &c.prog_data,
153 sizeof(c.prog_data),
154 &brw->clip.prog_data);
155 }
156
157 /* Calculate interpolants for triangle and line rasterization.
158 */
159 static void upload_clip_prog(struct brw_context *brw)
160 {
161 struct intel_context *intel = &brw->intel;
162 GLcontext *ctx = &intel->ctx;
163 struct brw_clip_prog_key key;
164
165 memset(&key, 0, sizeof(key));
166
167 /* Populate the key:
168 */
169 /* BRW_NEW_REDUCED_PRIMITIVE */
170 key.primitive = brw->intel.reduced_primitive;
171 /* CACHE_NEW_VS_PROG */
172 key.attrs = brw->vs.prog_data->outputs_written;
173 /* _NEW_LIGHT */
174 key.do_flat_shading = (ctx->Light.ShadeModel == GL_FLAT);
175 key.pv_first = (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION);
176 /* _NEW_TRANSFORM */
177 key.nr_userclip = brw_count_bits(ctx->Transform.ClipPlanesEnabled);
178
179 if (intel->gen == 5)
180 key.clip_mode = BRW_CLIPMODE_KERNEL_CLIP;
181 else
182 key.clip_mode = BRW_CLIPMODE_NORMAL;
183
184 /* _NEW_POLYGON */
185 if (key.primitive == GL_TRIANGLES) {
186 if (ctx->Polygon.CullFlag &&
187 ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
188 key.clip_mode = BRW_CLIPMODE_REJECT_ALL;
189 else {
190 GLuint fill_front = CLIP_CULL;
191 GLuint fill_back = CLIP_CULL;
192 GLuint offset_front = 0;
193 GLuint offset_back = 0;
194
195 if (!ctx->Polygon.CullFlag ||
196 ctx->Polygon.CullFaceMode != GL_FRONT) {
197 switch (ctx->Polygon.FrontMode) {
198 case GL_FILL:
199 fill_front = CLIP_FILL;
200 offset_front = 0;
201 break;
202 case GL_LINE:
203 fill_front = CLIP_LINE;
204 offset_front = ctx->Polygon.OffsetLine;
205 break;
206 case GL_POINT:
207 fill_front = CLIP_POINT;
208 offset_front = ctx->Polygon.OffsetPoint;
209 break;
210 }
211 }
212
213 if (!ctx->Polygon.CullFlag ||
214 ctx->Polygon.CullFaceMode != GL_BACK) {
215 switch (ctx->Polygon.BackMode) {
216 case GL_FILL:
217 fill_back = CLIP_FILL;
218 offset_back = 0;
219 break;
220 case GL_LINE:
221 fill_back = CLIP_LINE;
222 offset_back = ctx->Polygon.OffsetLine;
223 break;
224 case GL_POINT:
225 fill_back = CLIP_POINT;
226 offset_back = ctx->Polygon.OffsetPoint;
227 break;
228 }
229 }
230
231 if (ctx->Polygon.BackMode != GL_FILL ||
232 ctx->Polygon.FrontMode != GL_FILL) {
233 key.do_unfilled = 1;
234
235 /* Most cases the fixed function units will handle. Cases where
236 * one or more polygon faces are unfilled will require help:
237 */
238 key.clip_mode = BRW_CLIPMODE_CLIP_NON_REJECTED;
239
240 if (offset_back || offset_front) {
241 /* _NEW_POLYGON, _NEW_BUFFERS */
242 key.offset_units = ctx->Polygon.OffsetUnits * brw->intel.polygon_offset_scale;
243 key.offset_factor = ctx->Polygon.OffsetFactor * ctx->DrawBuffer->_MRD;
244 }
245
246 switch (ctx->Polygon.FrontFace) {
247 case GL_CCW:
248 key.fill_ccw = fill_front;
249 key.fill_cw = fill_back;
250 key.offset_ccw = offset_front;
251 key.offset_cw = offset_back;
252 if (ctx->Light.Model.TwoSide &&
253 key.fill_cw != CLIP_CULL)
254 key.copy_bfc_cw = 1;
255 break;
256 case GL_CW:
257 key.fill_cw = fill_front;
258 key.fill_ccw = fill_back;
259 key.offset_cw = offset_front;
260 key.offset_ccw = offset_back;
261 if (ctx->Light.Model.TwoSide &&
262 key.fill_ccw != CLIP_CULL)
263 key.copy_bfc_ccw = 1;
264 break;
265 }
266 }
267 }
268 }
269
270 drm_intel_bo_unreference(brw->clip.prog_bo);
271 brw->clip.prog_bo = brw_search_cache(&brw->cache, BRW_CLIP_PROG,
272 &key, sizeof(key),
273 NULL, 0,
274 &brw->clip.prog_data);
275 if (brw->clip.prog_bo == NULL)
276 compile_clip_prog( brw, &key );
277 }
278
279
280 const struct brw_tracked_state brw_clip_prog = {
281 .dirty = {
282 .mesa = (_NEW_LIGHT |
283 _NEW_TRANSFORM |
284 _NEW_POLYGON |
285 _NEW_BUFFERS),
286 .brw = (BRW_NEW_REDUCED_PRIMITIVE),
287 .cache = CACHE_NEW_VS_PROG
288 },
289 .prepare = upload_clip_prog
290 };