1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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 <keith@tungstengraphics.com>
33 #include "main/macros.h"
34 #include "st_context.h"
36 #include "pipe/p_context.h"
37 #include "pipe/p_defines.h"
38 #include "cso_cache/cso_context.h"
41 static GLuint
translate_fill( GLenum mode
)
45 return PIPE_POLYGON_MODE_POINT
;
47 return PIPE_POLYGON_MODE_LINE
;
49 return PIPE_POLYGON_MODE_FILL
;
58 static void update_raster_state( struct st_context
*st
)
60 struct gl_context
*ctx
= st
->ctx
;
61 struct pipe_rasterizer_state
*raster
= &st
->state
.rasterizer
;
62 const struct gl_vertex_program
*vertProg
= ctx
->VertexProgram
._Current
;
63 const struct gl_fragment_program
*fragProg
= ctx
->FragmentProgram
._Current
;
66 memset(raster
, 0, sizeof(*raster
));
68 /* _NEW_POLYGON, _NEW_BUFFERS
71 raster
->front_ccw
= (ctx
->Polygon
.FrontFace
== GL_CCW
);
74 * I think the intention here is that user-created framebuffer objects
75 * use Y=0=TOP layout instead of OpenGL's normal Y=0=bottom layout.
76 * Flipping Y changes CW to CCW and vice-versa.
77 * But this is an implementation/driver-specific artifact - remove...
79 if (ctx
->DrawBuffer
&& ctx
->DrawBuffer
->Name
!= 0)
80 raster
->front_ccw
^= 1;
85 if (ctx
->Light
.ShadeModel
== GL_FLAT
)
86 raster
->flatshade
= 1;
88 if (ctx
->Light
.ProvokingVertex
== GL_FIRST_VERTEX_CONVENTION_EXT
)
89 raster
->flatshade_first
= 1;
91 /* _NEW_LIGHT | _NEW_PROGRAM
93 * Back-face colors can come from traditional lighting (when
94 * GL_LIGHT_MODEL_TWO_SIDE is set) or from vertex programs/shaders (when
95 * GL_VERTEX_PROGRAM_TWO_SIDE is set). Note the logic here.
97 if (ctx
->VertexProgram
._Current
) {
98 if (ctx
->VertexProgram
._Enabled
||
99 (ctx
->Shader
.CurrentVertexProgram
&&
100 ctx
->Shader
.CurrentVertexProgram
->LinkStatus
)) {
101 /* user-defined vertex program or shader */
102 raster
->light_twoside
= ctx
->VertexProgram
.TwoSideEnabled
;
105 /* TNL-generated program */
106 raster
->light_twoside
= ctx
->Light
.Enabled
&& ctx
->Light
.Model
.TwoSide
;
109 else if (ctx
->Light
.Enabled
&& ctx
->Light
.Model
.TwoSide
) {
110 raster
->light_twoside
= 1;
115 if (ctx
->Polygon
.CullFlag
) {
116 switch (ctx
->Polygon
.CullFaceMode
) {
118 raster
->cull_face
= PIPE_FACE_FRONT
;
121 raster
->cull_face
= PIPE_FACE_BACK
;
123 case GL_FRONT_AND_BACK
:
124 raster
->cull_face
= PIPE_FACE_FRONT_AND_BACK
;
129 raster
->cull_face
= PIPE_FACE_NONE
;
135 raster
->fill_front
= translate_fill( ctx
->Polygon
.FrontMode
);
136 raster
->fill_back
= translate_fill( ctx
->Polygon
.BackMode
);
138 /* Simplify when culling is active:
140 if (raster
->cull_face
& PIPE_FACE_FRONT
) {
141 raster
->fill_front
= raster
->fill_back
;
144 if (raster
->cull_face
& PIPE_FACE_BACK
) {
145 raster
->fill_back
= raster
->fill_front
;
151 if (ctx
->Polygon
.OffsetUnits
!= 0.0 ||
152 ctx
->Polygon
.OffsetFactor
!= 0.0) {
153 raster
->offset_point
= ctx
->Polygon
.OffsetPoint
;
154 raster
->offset_line
= ctx
->Polygon
.OffsetLine
;
155 raster
->offset_tri
= ctx
->Polygon
.OffsetFill
;
158 if (ctx
->Polygon
.OffsetPoint
||
159 ctx
->Polygon
.OffsetLine
||
160 ctx
->Polygon
.OffsetFill
) {
161 raster
->offset_units
= ctx
->Polygon
.OffsetUnits
;
162 raster
->offset_scale
= ctx
->Polygon
.OffsetFactor
;
165 if (ctx
->Polygon
.SmoothFlag
)
166 raster
->poly_smooth
= 1;
168 if (ctx
->Polygon
.StippleFlag
)
169 raster
->poly_stipple_enable
= 1;
173 raster
->point_size
= ctx
->Point
.Size
;
175 if (!ctx
->Point
.PointSprite
&& ctx
->Point
.SmoothFlag
)
176 raster
->point_smooth
= 1;
178 /* _NEW_POINT | _NEW_PROGRAM
180 if (ctx
->Point
.PointSprite
) {
182 if ((ctx
->Point
.SpriteOrigin
== GL_UPPER_LEFT
) ^
183 (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
))
184 raster
->sprite_coord_mode
= PIPE_SPRITE_COORD_UPPER_LEFT
;
186 raster
->sprite_coord_mode
= PIPE_SPRITE_COORD_LOWER_LEFT
;
188 /* Coord replacement flags. If bit 'k' is set that means
189 * that we need to replace GENERIC[k] attrib with an automatically
190 * computed texture coord.
192 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
193 if (ctx
->Point
.CoordReplace
[i
]) {
194 raster
->sprite_coord_enable
|= 1 << i
;
197 if (fragProg
->Base
.InputsRead
& FRAG_BIT_PNTC
) {
198 raster
->sprite_coord_enable
|=
199 1 << (FRAG_ATTRIB_PNTC
- FRAG_ATTRIB_TEX0
);
202 raster
->point_quad_rasterization
= 1;
205 /* ST_NEW_VERTEX_PROGRAM
208 if (vertProg
->Base
.Id
== 0) {
209 if (vertProg
->Base
.OutputsWritten
& BITFIELD64_BIT(VERT_RESULT_PSIZ
)) {
210 /* generated program which emits point size */
211 raster
->point_size_per_vertex
= TRUE
;
214 else if (ctx
->VertexProgram
.PointSizeEnabled
) {
215 /* user-defined program and GL_VERTEX_PROGRAM_POINT_SIZE set */
216 raster
->point_size_per_vertex
= ctx
->VertexProgram
.PointSizeEnabled
;
219 if (!raster
->point_size_per_vertex
) {
221 raster
->point_size
= CLAMP(ctx
->Point
.Size
,
228 raster
->line_smooth
= ctx
->Line
.SmoothFlag
;
229 if (ctx
->Line
.SmoothFlag
) {
230 raster
->line_width
= CLAMP(ctx
->Line
.Width
,
231 ctx
->Const
.MinLineWidthAA
,
232 ctx
->Const
.MaxLineWidthAA
);
235 raster
->line_width
= CLAMP(ctx
->Line
.Width
,
236 ctx
->Const
.MinLineWidth
,
237 ctx
->Const
.MaxLineWidth
);
240 raster
->line_stipple_enable
= ctx
->Line
.StippleFlag
;
241 raster
->line_stipple_pattern
= ctx
->Line
.StipplePattern
;
242 /* GL stipple factor is in [1,256], remap to [0, 255] here */
243 raster
->line_stipple_factor
= ctx
->Line
.StippleFactor
- 1;
245 /* _NEW_MULTISAMPLE */
246 if (ctx
->Multisample
._Enabled
|| st
->force_msaa
)
247 raster
->multisample
= 1;
250 if (ctx
->Scissor
.Enabled
)
253 raster
->gl_rasterization_rules
= 1;
255 cso_set_rasterizer(st
->cso_context
, raster
);
258 const struct st_tracked_state st_update_rasterizer
= {
259 "st_update_rasterizer", /* name */
268 _NEW_SCISSOR
), /* mesa state dependencies*/
269 ST_NEW_VERTEX_PROGRAM
, /* state tracker dependencies */
271 update_raster_state
/* update function */