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 "st_context.h"
37 #include "st_program.h"
38 #include "pipe/p_context.h"
39 #include "pipe/p_defines.h"
40 #include "cso_cache/cso_context.h"
43 static GLuint
translate_fill( GLenum mode
)
47 return PIPE_POLYGON_MODE_POINT
;
49 return PIPE_POLYGON_MODE_LINE
;
51 return PIPE_POLYGON_MODE_FILL
;
60 static void update_raster_state( struct st_context
*st
)
62 struct gl_context
*ctx
= st
->ctx
;
63 struct pipe_rasterizer_state
*raster
= &st
->state
.rasterizer
;
64 const struct gl_vertex_program
*vertProg
= ctx
->VertexProgram
._Current
;
65 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 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
184 if (ctx
->Point
.CoordReplace
[i
]) {
185 raster
->sprite_coord_enable
|= 1 << i
;
188 if (!st
->needs_texcoord_semantic
&&
189 fragProg
->Base
.InputsRead
& VARYING_BIT_PNTC
) {
190 raster
->sprite_coord_enable
|=
191 1 << st_get_generic_varying_index(st
, VARYING_SLOT_PNTC
);
194 raster
->point_quad_rasterization
= 1;
197 /* ST_NEW_VERTEX_PROGRAM
200 if (vertProg
->Base
.Id
== 0) {
201 if (vertProg
->Base
.OutputsWritten
& BITFIELD64_BIT(VARYING_SLOT_PSIZ
)) {
202 /* generated program which emits point size */
203 raster
->point_size_per_vertex
= TRUE
;
206 else if (ctx
->VertexProgram
.PointSizeEnabled
) {
207 /* user-defined program and GL_VERTEX_PROGRAM_POINT_SIZE set */
208 raster
->point_size_per_vertex
= ctx
->VertexProgram
.PointSizeEnabled
;
211 if (!raster
->point_size_per_vertex
) {
213 raster
->point_size
= CLAMP(ctx
->Point
.Size
,
220 raster
->line_smooth
= ctx
->Line
.SmoothFlag
;
221 if (ctx
->Line
.SmoothFlag
) {
222 raster
->line_width
= CLAMP(ctx
->Line
.Width
,
223 ctx
->Const
.MinLineWidthAA
,
224 ctx
->Const
.MaxLineWidthAA
);
227 raster
->line_width
= CLAMP(ctx
->Line
.Width
,
228 ctx
->Const
.MinLineWidth
,
229 ctx
->Const
.MaxLineWidth
);
232 raster
->line_stipple_enable
= ctx
->Line
.StippleFlag
;
233 raster
->line_stipple_pattern
= ctx
->Line
.StipplePattern
;
234 /* GL stipple factor is in [1,256], remap to [0, 255] here */
235 raster
->line_stipple_factor
= ctx
->Line
.StippleFactor
- 1;
237 /* _NEW_MULTISAMPLE */
238 raster
->multisample
= ctx
->Multisample
._Enabled
;
240 /* _NEW_MULTISAMPLE | _NEW_BUFFERS */
241 raster
->force_persample_interp
=
242 st
->can_force_persample_interp
&&
243 ctx
->Multisample
._Enabled
&&
244 ctx
->Multisample
.SampleShading
&&
245 ctx
->Multisample
.MinSampleShadingValue
*
246 ctx
->DrawBuffer
->Visual
.samples
> 1;
249 raster
->scissor
= ctx
->Scissor
.EnableFlags
;
251 /* _NEW_FRAG_CLAMP */
252 raster
->clamp_fragment_color
= !st
->clamp_frag_color_in_shader
&&
253 ctx
->Color
._ClampFragmentColor
;
255 raster
->half_pixel_center
= 1;
256 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
)
257 raster
->bottom_edge_rule
= 1;
259 if (ctx
->Transform
.ClipOrigin
== GL_UPPER_LEFT
)
260 raster
->bottom_edge_rule
^= 1;
262 /* ST_NEW_RASTERIZER */
263 raster
->rasterizer_discard
= ctx
->RasterDiscard
;
265 if (st
->edgeflag_culls_prims
) {
266 /* All edge flags are FALSE. Cull the affected faces. */
267 if (raster
->fill_front
!= PIPE_POLYGON_MODE_FILL
)
268 raster
->cull_face
|= PIPE_FACE_FRONT
;
269 if (raster
->fill_back
!= PIPE_POLYGON_MODE_FILL
)
270 raster
->cull_face
|= PIPE_FACE_BACK
;
274 raster
->depth_clip
= !ctx
->Transform
.DepthClamp
;
275 raster
->clip_plane_enable
= ctx
->Transform
.ClipPlanesEnabled
;
276 raster
->clip_halfz
= (ctx
->Transform
.ClipDepthMode
== GL_ZERO_TO_ONE
);
278 cso_set_rasterizer(st
->cso_context
, raster
);
281 const struct st_tracked_state st_update_rasterizer
= {
282 "st_update_rasterizer", /* name */
293 _NEW_TRANSFORM
), /* mesa state dependencies*/
294 (ST_NEW_VERTEX_PROGRAM
|
295 ST_NEW_RASTERIZER
), /* state tracker dependencies */
297 update_raster_state
/* update function */