1 /**************************************************************************
3 * Copyright 2007 VMware, Inc.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
30 * Keith Whitwell <keithw@vmware.com>
33 #include "main/macros.h"
34 #include "main/framebuffer.h"
35 #include "st_context.h"
38 #include "st_program.h"
39 #include "pipe/p_context.h"
40 #include "pipe/p_defines.h"
41 #include "cso_cache/cso_context.h"
44 static GLuint
translate_fill( GLenum mode
)
48 return PIPE_POLYGON_MODE_POINT
;
50 return PIPE_POLYGON_MODE_LINE
;
52 return PIPE_POLYGON_MODE_FILL
;
61 static void update_raster_state( struct st_context
*st
)
63 struct gl_context
*ctx
= st
->ctx
;
64 struct pipe_rasterizer_state
*raster
= &st
->state
.rasterizer
;
65 const struct gl_program
*vertProg
= ctx
->VertexProgram
._Current
;
66 const struct gl_fragment_program
*fragProg
= ctx
->FragmentProgram
._Current
;
68 memset(raster
, 0, sizeof(*raster
));
70 /* _NEW_POLYGON, _NEW_BUFFERS
73 raster
->front_ccw
= (ctx
->Polygon
.FrontFace
== GL_CCW
);
76 if (ctx
->Transform
.ClipOrigin
== GL_UPPER_LEFT
) {
77 raster
->front_ccw
^= 1;
81 * Gallium's surfaces are Y=0=TOP orientation. OpenGL is the
82 * opposite. Window system surfaces are Y=0=TOP. Mesa's FBOs
83 * must match OpenGL conventions so FBOs use Y=0=BOTTOM. In that
84 * case, we must invert Y and flip the notion of front vs. back.
86 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
) {
87 /* Drawing to an FBO. The viewport will be inverted. */
88 raster
->front_ccw
^= 1;
94 raster
->flatshade
= ctx
->Light
.ShadeModel
== GL_FLAT
;
96 raster
->flatshade_first
= ctx
->Light
.ProvokingVertex
==
97 GL_FIRST_VERTEX_CONVENTION_EXT
;
99 /* _NEW_LIGHT | _NEW_PROGRAM */
100 raster
->light_twoside
= ctx
->VertexProgram
._TwoSideEnabled
;
102 /*_NEW_LIGHT | _NEW_BUFFERS */
103 raster
->clamp_vertex_color
= !st
->clamp_vert_color_in_shader
&&
104 ctx
->Light
._ClampVertexColor
;
108 if (ctx
->Polygon
.CullFlag
) {
109 switch (ctx
->Polygon
.CullFaceMode
) {
111 raster
->cull_face
= PIPE_FACE_FRONT
;
114 raster
->cull_face
= PIPE_FACE_BACK
;
116 case GL_FRONT_AND_BACK
:
117 raster
->cull_face
= PIPE_FACE_FRONT_AND_BACK
;
122 raster
->cull_face
= PIPE_FACE_NONE
;
128 if (ST_DEBUG
& DEBUG_WIREFRAME
) {
129 raster
->fill_front
= PIPE_POLYGON_MODE_LINE
;
130 raster
->fill_back
= PIPE_POLYGON_MODE_LINE
;
133 raster
->fill_front
= translate_fill( ctx
->Polygon
.FrontMode
);
134 raster
->fill_back
= translate_fill( ctx
->Polygon
.BackMode
);
137 /* Simplify when culling is active:
139 if (raster
->cull_face
& PIPE_FACE_FRONT
) {
140 raster
->fill_front
= raster
->fill_back
;
143 if (raster
->cull_face
& PIPE_FACE_BACK
) {
144 raster
->fill_back
= raster
->fill_front
;
150 if (ctx
->Polygon
.OffsetPoint
||
151 ctx
->Polygon
.OffsetLine
||
152 ctx
->Polygon
.OffsetFill
) {
153 raster
->offset_point
= ctx
->Polygon
.OffsetPoint
;
154 raster
->offset_line
= ctx
->Polygon
.OffsetLine
;
155 raster
->offset_tri
= ctx
->Polygon
.OffsetFill
;
156 raster
->offset_units
= ctx
->Polygon
.OffsetUnits
;
157 raster
->offset_scale
= ctx
->Polygon
.OffsetFactor
;
158 raster
->offset_clamp
= ctx
->Polygon
.OffsetClamp
;
161 raster
->poly_smooth
= ctx
->Polygon
.SmoothFlag
;
162 raster
->poly_stipple_enable
= ctx
->Polygon
.StippleFlag
;
166 raster
->point_size
= ctx
->Point
.Size
;
167 raster
->point_smooth
= !ctx
->Point
.PointSprite
&& ctx
->Point
.SmoothFlag
;
169 /* _NEW_POINT | _NEW_PROGRAM
171 if (ctx
->Point
.PointSprite
) {
173 if ((ctx
->Point
.SpriteOrigin
== GL_UPPER_LEFT
) ^
174 (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
))
175 raster
->sprite_coord_mode
= PIPE_SPRITE_COORD_UPPER_LEFT
;
177 raster
->sprite_coord_mode
= PIPE_SPRITE_COORD_LOWER_LEFT
;
179 /* Coord replacement flags. If bit 'k' is set that means
180 * that we need to replace GENERIC[k] attrib with an automatically
181 * computed texture coord.
183 raster
->sprite_coord_enable
= ctx
->Point
.CoordReplace
&
184 ((1u << MAX_TEXTURE_COORD_UNITS
) - 1);
185 if (!st
->needs_texcoord_semantic
&&
186 fragProg
->Base
.InputsRead
& VARYING_BIT_PNTC
) {
187 raster
->sprite_coord_enable
|=
188 1 << st_get_generic_varying_index(st
, VARYING_SLOT_PNTC
);
191 raster
->point_quad_rasterization
= 1;
194 /* ST_NEW_VERTEX_PROGRAM
197 if (vertProg
->Id
== 0) {
198 if (vertProg
->OutputsWritten
& BITFIELD64_BIT(VARYING_SLOT_PSIZ
)) {
199 /* generated program which emits point size */
200 raster
->point_size_per_vertex
= TRUE
;
203 else if (ctx
->API
!= API_OPENGLES2
) {
204 /* PointSizeEnabled is always set in ES2 contexts */
205 raster
->point_size_per_vertex
= ctx
->VertexProgram
.PointSizeEnabled
;
208 /* ST_NEW_TESSEVAL_PROGRAM | ST_NEW_GEOMETRY_PROGRAM */
209 /* We have to check the last bound stage and see if it writes psize */
210 struct gl_program
*last
= NULL
;
211 if (ctx
->GeometryProgram
._Current
)
212 last
= ctx
->GeometryProgram
._Current
;
213 else if (ctx
->TessEvalProgram
._Current
)
214 last
= ctx
->TessEvalProgram
._Current
;
215 else if (ctx
->VertexProgram
._Current
)
216 last
= ctx
->VertexProgram
._Current
;
218 raster
->point_size_per_vertex
=
219 !!(last
->OutputsWritten
& BITFIELD64_BIT(VARYING_SLOT_PSIZ
));
222 if (!raster
->point_size_per_vertex
) {
224 raster
->point_size
= CLAMP(ctx
->Point
.Size
,
231 raster
->line_smooth
= ctx
->Line
.SmoothFlag
;
232 if (ctx
->Line
.SmoothFlag
) {
233 raster
->line_width
= CLAMP(ctx
->Line
.Width
,
234 ctx
->Const
.MinLineWidthAA
,
235 ctx
->Const
.MaxLineWidthAA
);
238 raster
->line_width
= CLAMP(ctx
->Line
.Width
,
239 ctx
->Const
.MinLineWidth
,
240 ctx
->Const
.MaxLineWidth
);
243 raster
->line_stipple_enable
= ctx
->Line
.StippleFlag
;
244 raster
->line_stipple_pattern
= ctx
->Line
.StipplePattern
;
245 /* GL stipple factor is in [1,256], remap to [0, 255] here */
246 raster
->line_stipple_factor
= ctx
->Line
.StippleFactor
- 1;
248 /* _NEW_MULTISAMPLE */
249 raster
->multisample
= _mesa_is_multisample_enabled(ctx
);
251 /* _NEW_MULTISAMPLE | _NEW_BUFFERS */
252 raster
->force_persample_interp
=
253 !st
->force_persample_in_shader
&&
254 _mesa_is_multisample_enabled(ctx
) &&
255 ctx
->Multisample
.SampleShading
&&
256 ctx
->Multisample
.MinSampleShadingValue
*
257 _mesa_geometric_samples(ctx
->DrawBuffer
) > 1;
260 raster
->scissor
= ctx
->Scissor
.EnableFlags
;
262 /* _NEW_FRAG_CLAMP */
263 raster
->clamp_fragment_color
= !st
->clamp_frag_color_in_shader
&&
264 ctx
->Color
._ClampFragmentColor
;
266 raster
->half_pixel_center
= 1;
267 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
)
268 raster
->bottom_edge_rule
= 1;
270 if (ctx
->Transform
.ClipOrigin
== GL_UPPER_LEFT
)
271 raster
->bottom_edge_rule
^= 1;
273 /* ST_NEW_RASTERIZER */
274 raster
->rasterizer_discard
= ctx
->RasterDiscard
;
276 if (st
->edgeflag_culls_prims
) {
277 /* All edge flags are FALSE. Cull the affected faces. */
278 if (raster
->fill_front
!= PIPE_POLYGON_MODE_FILL
)
279 raster
->cull_face
|= PIPE_FACE_FRONT
;
280 if (raster
->fill_back
!= PIPE_POLYGON_MODE_FILL
)
281 raster
->cull_face
|= PIPE_FACE_BACK
;
285 raster
->depth_clip
= !ctx
->Transform
.DepthClamp
;
286 raster
->clip_plane_enable
= ctx
->Transform
.ClipPlanesEnabled
;
287 raster
->clip_halfz
= (ctx
->Transform
.ClipDepthMode
== GL_ZERO_TO_ONE
);
289 cso_set_rasterizer(st
->cso_context
, raster
);
292 const struct st_tracked_state st_update_rasterizer
= {
293 update_raster_state
/* update function */