1 /*
2 * Copyright © 2011 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #include "brw_context.h"
25 #include "brw_state.h"
26 #include "brw_defines.h"
27 #include "brw_util.h"
28 #include "main/macros.h"
29 #include "main/fbobject.h"
30 #include "intel_batchbuffer.h"
31
32 static void
upload_sbe_state(struct brw_context * brw)33 upload_sbe_state(struct brw_context *brw)
34 {
35 struct intel_context *intel = &brw->intel;
36 struct gl_context *ctx = &intel->ctx;
37 /* BRW_NEW_FRAGMENT_PROGRAM */
38 uint32_t num_outputs = _mesa_bitcount_64(brw->fragment_program->Base.InputsRead);
39 /* _NEW_LIGHT */
40 bool shade_model_flat = ctx->Light.ShadeModel == GL_FLAT;
41 uint32_t dw1, dw10, dw11;
42 int i;
43 int attr = 0, input_index = 0;
44 int urb_entry_read_offset = 1;
45 uint16_t attr_overrides[FRAG_ATTRIB_MAX];
46 /* _NEW_BUFFERS */
47 bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
48 uint32_t point_sprite_origin;
49
50 /* FINISHME: Attribute Swizzle Control Mode? */
51 dw1 = GEN7_SBE_SWIZZLE_ENABLE | num_outputs << GEN7_SBE_NUM_OUTPUTS_SHIFT;
52
53 /* _NEW_POINT
54 *
55 * Window coordinates in an FBO are inverted, which means point
56 * sprite origin must be inverted.
57 */
58 if ((ctx->Point.SpriteOrigin == GL_LOWER_LEFT) != render_to_fbo) {
59 point_sprite_origin = GEN6_SF_POINT_SPRITE_LOWERLEFT;
60 } else {
61 point_sprite_origin = GEN6_SF_POINT_SPRITE_UPPERLEFT;
62 }
63 dw1 |= point_sprite_origin;
64
65
66 dw10 = 0;
67 dw11 = 0;
68
69 /* Create the mapping from the FS inputs we produce to the VS outputs
70 * they source from.
71 */
72 uint32_t max_source_attr = 0;
73 for (; attr < FRAG_ATTRIB_MAX; attr++) {
74 enum glsl_interp_qualifier interp_qualifier =
75 brw->fragment_program->InterpQualifier[attr];
76 bool is_gl_Color = attr == FRAG_ATTRIB_COL0 || attr == FRAG_ATTRIB_COL1;
77
78 if (!(brw->fragment_program->Base.InputsRead & BITFIELD64_BIT(attr)))
79 continue;
80
81 if (ctx->Point.PointSprite &&
82 attr >= FRAG_ATTRIB_TEX0 && attr <= FRAG_ATTRIB_TEX7 &&
83 ctx->Point.CoordReplace[attr - FRAG_ATTRIB_TEX0]) {
84 dw10 |= (1 << input_index);
85 }
86
87 if (attr == FRAG_ATTRIB_PNTC)
88 dw10 |= (1 << input_index);
89
90 /* flat shading */
91 if (interp_qualifier == INTERP_QUALIFIER_FLAT ||
92 (shade_model_flat && is_gl_Color &&
93 interp_qualifier == INTERP_QUALIFIER_NONE))
94 dw11 |= (1 << input_index);
95
96 /* The hardware can only do the overrides on 16 overrides at a
97 * time, and the other up to 16 have to be lined up so that the
98 * input index = the output index. We'll need to do some
99 * tweaking to make sure that's the case.
100 */
101 assert(input_index < 16 || attr == input_index);
102
103 /* CACHE_NEW_VS_PROG | _NEW_LIGHT | _NEW_PROGRAM */
104 attr_overrides[input_index++] =
105 get_attr_override(&brw->vs.prog_data->vue_map,
106 urb_entry_read_offset, attr,
107 ctx->VertexProgram._TwoSideEnabled,
108 &max_source_attr);
109 }
110
111 /* From the Ivy Bridge PRM, Volume 2, Part 1, documentation for
112 * 3DSTATE_SBE DWord 1 bits 15:11, "Vertex URB Entry Read Length":
113 *
114 * "This field should be set to the minimum length required to read the
115 * maximum source attribute. The maximum source attribute is indicated
116 * by the maximum value of the enabled Attribute # Source Attribute if
117 * Attribute Swizzle Enable is set, Number of Output Attributes-1 if
118 * enable is not set.
119 *
120 * read_length = ceiling((max_source_attr + 1) / 2)"
121 */
122 uint32_t urb_entry_read_length = ALIGN(max_source_attr + 1, 2) / 2;
123 dw1 |= urb_entry_read_length << GEN7_SBE_URB_ENTRY_READ_LENGTH_SHIFT |
124 urb_entry_read_offset << GEN7_SBE_URB_ENTRY_READ_OFFSET_SHIFT;
125
126 for (; input_index < FRAG_ATTRIB_MAX; input_index++)
127 attr_overrides[input_index] = 0;
128
129 BEGIN_BATCH(14);
130 OUT_BATCH(_3DSTATE_SBE << 16 | (14 - 2));
131 OUT_BATCH(dw1);
132
133 /* Output dwords 2 through 9 */
134 for (i = 0; i < 8; i++) {
135 OUT_BATCH(attr_overrides[i * 2] | attr_overrides[i * 2 + 1] << 16);
136 }
137
138 OUT_BATCH(dw10); /* point sprite texcoord bitmask */
139 OUT_BATCH(dw11); /* constant interp bitmask */
140 OUT_BATCH(0); /* wrapshortest enables 0-7 */
141 OUT_BATCH(0); /* wrapshortest enables 8-15 */
142 ADVANCE_BATCH();
143 }
144
145 const struct brw_tracked_state gen7_sbe_state = {
146 .dirty = {
147 .mesa = (_NEW_BUFFERS |
148 _NEW_LIGHT |
149 _NEW_POINT |
150 _NEW_PROGRAM),
151 .brw = (BRW_NEW_CONTEXT |
152 BRW_NEW_FRAGMENT_PROGRAM),
153 .cache = CACHE_NEW_VS_PROG
154 },
155 .emit = upload_sbe_state,
156 };
157
158 static void
upload_sf_state(struct brw_context * brw)159 upload_sf_state(struct brw_context *brw)
160 {
161 struct intel_context *intel = &brw->intel;
162 struct gl_context *ctx = &intel->ctx;
163 uint32_t dw1, dw2, dw3;
164 float point_size;
165 /* _NEW_BUFFERS */
166 bool render_to_fbo = _mesa_is_user_fbo(brw->intel.ctx.DrawBuffer);
167 bool multisampled_fbo = ctx->DrawBuffer->Visual.samples > 1;
168
169 dw1 = GEN6_SF_STATISTICS_ENABLE |
170 GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
171
172 /* _NEW_BUFFERS */
173 dw1 |= (brw_depthbuffer_format(brw) << GEN7_SF_DEPTH_BUFFER_SURFACE_FORMAT_SHIFT);
174
175 /* _NEW_POLYGON */
176 if ((ctx->Polygon.FrontFace == GL_CCW) ^ render_to_fbo)
177 dw1 |= GEN6_SF_WINDING_CCW;
178
179 if (ctx->Polygon.OffsetFill)
180 dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
181
182 if (ctx->Polygon.OffsetLine)
183 dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
184
185 if (ctx->Polygon.OffsetPoint)
186 dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
187
188 switch (ctx->Polygon.FrontMode) {
189 case GL_FILL:
190 dw1 |= GEN6_SF_FRONT_SOLID;
191 break;
192
193 case GL_LINE:
194 dw1 |= GEN6_SF_FRONT_WIREFRAME;
195 break;
196
197 case GL_POINT:
198 dw1 |= GEN6_SF_FRONT_POINT;
199 break;
200
201 default:
202 assert(0);
203 break;
204 }
205
206 switch (ctx->Polygon.BackMode) {
207 case GL_FILL:
208 dw1 |= GEN6_SF_BACK_SOLID;
209 break;
210
211 case GL_LINE:
212 dw1 |= GEN6_SF_BACK_WIREFRAME;
213 break;
214
215 case GL_POINT:
216 dw1 |= GEN6_SF_BACK_POINT;
217 break;
218
219 default:
220 assert(0);
221 break;
222 }
223
224 dw2 = 0;
225
226 if (ctx->Polygon.CullFlag) {
227 switch (ctx->Polygon.CullFaceMode) {
228 case GL_FRONT:
229 dw2 |= GEN6_SF_CULL_FRONT;
230 break;
231 case GL_BACK:
232 dw2 |= GEN6_SF_CULL_BACK;
233 break;
234 case GL_FRONT_AND_BACK:
235 dw2 |= GEN6_SF_CULL_BOTH;
236 break;
237 default:
238 assert(0);
239 break;
240 }
241 } else {
242 dw2 |= GEN6_SF_CULL_NONE;
243 }
244
245 /* _NEW_SCISSOR */
246 if (ctx->Scissor.Enabled)
247 dw2 |= GEN6_SF_SCISSOR_ENABLE;
248
249 /* _NEW_LINE */
250 {
251 uint32_t line_width_u3_7 = U_FIXED(CLAMP(ctx->Line.Width, 0.0, 7.99), 7);
252 /* TODO: line width of 0 is not allowed when MSAA enabled */
253 if (line_width_u3_7 == 0)
254 line_width_u3_7 = 1;
255 dw2 |= line_width_u3_7 << GEN6_SF_LINE_WIDTH_SHIFT;
256 }
257 if (ctx->Line.SmoothFlag) {
258 dw2 |= GEN6_SF_LINE_AA_ENABLE;
259 dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
260 }
261 if (ctx->Line.StippleFlag && intel->is_haswell) {
262 dw2 |= HSW_SF_LINE_STIPPLE_ENABLE;
263 }
264 /* _NEW_MULTISAMPLE */
265 if (multisampled_fbo && ctx->Multisample.Enabled)
266 dw2 |= GEN6_SF_MSRAST_ON_PATTERN;
267
268 /* FINISHME: Last Pixel Enable? Vertex Sub Pixel Precision Select?
269 */
270
271 dw3 = GEN6_SF_LINE_AA_MODE_TRUE;
272
273 /* _NEW_PROGRAM | _NEW_POINT */
274 if (!(ctx->VertexProgram.PointSizeEnabled || ctx->Point._Attenuated))
275 dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
276
277 /* Clamp to ARB_point_parameters user limits */
278 point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
279
280 /* Clamp to the hardware limits and convert to fixed point */
281 dw3 |= U_FIXED(CLAMP(point_size, 0.125, 255.875), 3);
282
283 /* _NEW_LIGHT */
284 if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
285 dw3 |=
286 (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
287 (2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
288 (1 << GEN6_SF_LINE_PROVOKE_SHIFT);
289 } else {
290 dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
291 }
292
293 BEGIN_BATCH(7);
294 OUT_BATCH(_3DSTATE_SF << 16 | (7 - 2));
295 OUT_BATCH(dw1);
296 OUT_BATCH(dw2);
297 OUT_BATCH(dw3);
298 OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant. copied from gen4 */
299 OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
300 OUT_BATCH_F(0.0); /* XXX: global depth offset clamp */
301 ADVANCE_BATCH();
302 }
303
304 const struct brw_tracked_state gen7_sf_state = {
305 .dirty = {
306 .mesa = (_NEW_LIGHT |
307 _NEW_PROGRAM |
308 _NEW_POLYGON |
309 _NEW_LINE |
310 _NEW_SCISSOR |
311 _NEW_BUFFERS |
312 _NEW_POINT |
313 _NEW_MULTISAMPLE),
314 .brw = BRW_NEW_CONTEXT,
315 .cache = CACHE_NEW_VS_PROG
316 },
317 .emit = upload_sf_state,
318 };
319