1 /**************************************************************************
2 *
3 * Copyright 2007 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 /*
29 * Authors:
30 * Keith Whitwell <keithw@vmware.com>
31 */
32
33 #include "main/macros.h"
34 #include "main/framebuffer.h"
35 #include "main/state.h"
36 #include "st_context.h"
37 #include "st_atom.h"
38 #include "st_debug.h"
39 #include "st_program.h"
40 #include "st_util.h"
41 #include "pipe/p_context.h"
42 #include "pipe/p_defines.h"
43 #include "cso_cache/cso_context.h"
44
45
46 static GLuint
translate_fill(GLenum mode)47 translate_fill(GLenum mode)
48 {
49 switch (mode) {
50 case GL_POINT:
51 return PIPE_POLYGON_MODE_POINT;
52 case GL_LINE:
53 return PIPE_POLYGON_MODE_LINE;
54 case GL_FILL:
55 return PIPE_POLYGON_MODE_FILL;
56 case GL_FILL_RECTANGLE_NV:
57 return PIPE_POLYGON_MODE_FILL_RECTANGLE;
58 default:
59 assert(0);
60 return 0;
61 }
62 }
63
64 void
st_update_rasterizer(struct st_context * st)65 st_update_rasterizer(struct st_context *st)
66 {
67 struct gl_context *ctx = st->ctx;
68 struct pipe_rasterizer_state *raster = &st->state.rasterizer;
69 const struct gl_program *fragProg = ctx->FragmentProgram._Current;
70
71 memset(raster, 0, sizeof(*raster));
72
73 /* _NEW_POLYGON, _NEW_BUFFERS
74 */
75 {
76 raster->front_ccw = (ctx->Polygon.FrontFace == GL_CCW);
77
78 /* _NEW_TRANSFORM */
79 if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT) {
80 raster->front_ccw ^= 1;
81 }
82
83 /*
84 * Gallium's surfaces are Y=0=TOP orientation. OpenGL is the
85 * opposite. Window system surfaces are Y=0=TOP. Mesa's FBOs
86 * must match OpenGL conventions so FBOs use Y=0=BOTTOM. In that
87 * case, we must invert Y and flip the notion of front vs. back.
88 */
89 if (st->state.fb_orientation == Y_0_BOTTOM) {
90 /* Drawing to an FBO. The viewport will be inverted. */
91 raster->front_ccw ^= 1;
92 }
93 }
94
95 /* _NEW_LIGHT
96 */
97 raster->flatshade = !st->lower_flatshade &&
98 ctx->Light.ShadeModel == GL_FLAT;
99
100 raster->flatshade_first = ctx->Light.ProvokingVertex ==
101 GL_FIRST_VERTEX_CONVENTION_EXT;
102
103 /* _NEW_LIGHT | _NEW_PROGRAM */
104 if (!st->lower_two_sided_color)
105 raster->light_twoside = _mesa_vertex_program_two_side_enabled(ctx);
106
107 /*_NEW_LIGHT | _NEW_BUFFERS */
108 raster->clamp_vertex_color = !st->clamp_vert_color_in_shader &&
109 ctx->Light._ClampVertexColor;
110
111 /* _NEW_POLYGON
112 */
113 if (ctx->Polygon.CullFlag) {
114 switch (ctx->Polygon.CullFaceMode) {
115 case GL_FRONT:
116 raster->cull_face = PIPE_FACE_FRONT;
117 break;
118 case GL_BACK:
119 raster->cull_face = PIPE_FACE_BACK;
120 break;
121 case GL_FRONT_AND_BACK:
122 raster->cull_face = PIPE_FACE_FRONT_AND_BACK;
123 break;
124 }
125 }
126 else {
127 raster->cull_face = PIPE_FACE_NONE;
128 }
129
130 /* _NEW_POLYGON
131 */
132 {
133 if (ST_DEBUG & DEBUG_WIREFRAME) {
134 raster->fill_front = PIPE_POLYGON_MODE_LINE;
135 raster->fill_back = PIPE_POLYGON_MODE_LINE;
136 }
137 else {
138 raster->fill_front = translate_fill(ctx->Polygon.FrontMode);
139 raster->fill_back = translate_fill(ctx->Polygon.BackMode);
140 }
141
142 /* Simplify when culling is active:
143 */
144 if (raster->cull_face & PIPE_FACE_FRONT) {
145 raster->fill_front = raster->fill_back;
146 }
147
148 if (raster->cull_face & PIPE_FACE_BACK) {
149 raster->fill_back = raster->fill_front;
150 }
151 }
152
153 /* _NEW_POLYGON
154 */
155 if (ctx->Polygon.OffsetPoint ||
156 ctx->Polygon.OffsetLine ||
157 ctx->Polygon.OffsetFill) {
158 raster->offset_point = ctx->Polygon.OffsetPoint;
159 raster->offset_line = ctx->Polygon.OffsetLine;
160 raster->offset_tri = ctx->Polygon.OffsetFill;
161 raster->offset_units = ctx->Polygon.OffsetUnits;
162 raster->offset_scale = ctx->Polygon.OffsetFactor;
163 raster->offset_clamp = ctx->Polygon.OffsetClamp;
164 }
165
166 raster->poly_smooth = ctx->Polygon.SmoothFlag;
167 raster->poly_stipple_enable = ctx->Polygon.StippleFlag;
168
169 /* _NEW_POINT
170 */
171 raster->point_size = ctx->Point.Size;
172 raster->point_smooth = !ctx->Point.PointSprite && ctx->Point.SmoothFlag;
173
174 /* _NEW_POINT | _NEW_PROGRAM
175 */
176 if (ctx->Point.PointSprite) {
177 /* origin */
178 if ((ctx->Point.SpriteOrigin == GL_UPPER_LEFT) ^
179 (st->state.fb_orientation == Y_0_BOTTOM))
180 raster->sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT;
181 else
182 raster->sprite_coord_mode = PIPE_SPRITE_COORD_LOWER_LEFT;
183
184 /* Coord replacement flags. If bit 'k' is set that means
185 * that we need to replace GENERIC[k] attrib with an automatically
186 * computed texture coord.
187 */
188 raster->sprite_coord_enable = ctx->Point.CoordReplace &
189 ((1u << MAX_TEXTURE_COORD_UNITS) - 1);
190 if (!st->needs_texcoord_semantic &&
191 fragProg->info.inputs_read & VARYING_BIT_PNTC) {
192 raster->sprite_coord_enable |=
193 1 << st_get_generic_varying_index(st, VARYING_SLOT_PNTC);
194 }
195
196 raster->point_quad_rasterization = 1;
197 }
198
199 /* ST_NEW_VERTEX_PROGRAM
200 */
201 raster->point_size_per_vertex = st_point_size_per_vertex(ctx);
202 if (!raster->point_size_per_vertex) {
203 /* clamp size now */
204 raster->point_size = CLAMP(ctx->Point.Size,
205 ctx->Point.MinSize,
206 ctx->Point.MaxSize);
207 }
208
209 /* _NEW_LINE
210 */
211 raster->line_smooth = ctx->Line.SmoothFlag;
212 if (ctx->Line.SmoothFlag) {
213 raster->line_width = CLAMP(ctx->Line.Width,
214 ctx->Const.MinLineWidthAA,
215 ctx->Const.MaxLineWidthAA);
216 }
217 else {
218 raster->line_width = CLAMP(ctx->Line.Width,
219 ctx->Const.MinLineWidth,
220 ctx->Const.MaxLineWidth);
221 }
222
223 raster->line_stipple_enable = ctx->Line.StippleFlag;
224 raster->line_stipple_pattern = ctx->Line.StipplePattern;
225 /* GL stipple factor is in [1,256], remap to [0, 255] here */
226 raster->line_stipple_factor = ctx->Line.StippleFactor - 1;
227
228 /* _NEW_MULTISAMPLE */
229 raster->multisample = _mesa_is_multisample_enabled(ctx);
230
231 /* _NEW_MULTISAMPLE | _NEW_BUFFERS */
232 raster->force_persample_interp =
233 !st->force_persample_in_shader &&
234 raster->multisample &&
235 ctx->Multisample.SampleShading &&
236 ctx->Multisample.MinSampleShadingValue *
237 _mesa_geometric_samples(ctx->DrawBuffer) > 1;
238
239 /* _NEW_SCISSOR */
240 raster->scissor = !!ctx->Scissor.EnableFlags;
241
242 /* gl_driver_flags::NewFragClamp */
243 raster->clamp_fragment_color = !st->clamp_frag_color_in_shader &&
244 ctx->Color._ClampFragmentColor;
245
246 raster->half_pixel_center = 1;
247 if (st->state.fb_orientation == Y_0_TOP)
248 raster->bottom_edge_rule = 1;
249
250 /* _NEW_TRANSFORM */
251 if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT)
252 raster->bottom_edge_rule ^= 1;
253
254 /* ST_NEW_RASTERIZER */
255 raster->rasterizer_discard = ctx->RasterDiscard;
256 if (ctx->TileRasterOrderFixed) {
257 raster->tile_raster_order_fixed = true;
258 raster->tile_raster_order_increasing_x = ctx->TileRasterOrderIncreasingX;
259 raster->tile_raster_order_increasing_y = ctx->TileRasterOrderIncreasingY;
260 }
261
262 if (st->edgeflag_culls_prims) {
263 /* All edge flags are FALSE. Cull the affected faces. */
264 if (raster->fill_front != PIPE_POLYGON_MODE_FILL)
265 raster->cull_face |= PIPE_FACE_FRONT;
266 if (raster->fill_back != PIPE_POLYGON_MODE_FILL)
267 raster->cull_face |= PIPE_FACE_BACK;
268 }
269
270 /* _NEW_TRANSFORM */
271 raster->depth_clip_near = st->clamp_frag_depth_in_shader ||
272 !ctx->Transform.DepthClampNear;
273 raster->depth_clip_far = st->clamp_frag_depth_in_shader ||
274 !ctx->Transform.DepthClampFar;
275 raster->clip_plane_enable = ctx->Transform.ClipPlanesEnabled;
276 raster->clip_halfz = (ctx->Transform.ClipDepthMode == GL_ZERO_TO_ONE);
277
278 /* ST_NEW_RASTERIZER */
279 if (ctx->ConservativeRasterization) {
280 if (ctx->ConservativeRasterMode == GL_CONSERVATIVE_RASTER_MODE_POST_SNAP_NV)
281 raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_POST_SNAP;
282 else
283 raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_PRE_SNAP;
284 } else if (ctx->IntelConservativeRasterization) {
285 raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_POST_SNAP;
286 } else {
287 raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_OFF;
288 }
289
290 raster->conservative_raster_dilate = ctx->ConservativeRasterDilate;
291
292 raster->subpixel_precision_x = ctx->SubpixelPrecisionBias[0];
293 raster->subpixel_precision_y = ctx->SubpixelPrecisionBias[1];
294
295 cso_set_rasterizer(st->cso_context, raster);
296 }
297