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
;
56 static GLboolean
get_offset_flag( GLuint fill_mode
,
57 const struct gl_polygon_attrib
*p
)
60 case PIPE_POLYGON_MODE_POINT
:
61 return p
->OffsetPoint
;
62 case PIPE_POLYGON_MODE_LINE
:
64 case PIPE_POLYGON_MODE_FILL
:
73 static void update_raster_state( struct st_context
*st
)
75 GLcontext
*ctx
= st
->ctx
;
76 struct pipe_rasterizer_state
*raster
= &st
->state
.rasterizer
;
77 const struct gl_vertex_program
*vertProg
= ctx
->VertexProgram
._Current
;
80 memset(raster
, 0, sizeof(*raster
));
82 raster
->origin_lower_left
= 1; /* Always true for OpenGL */
84 /* _NEW_POLYGON, _NEW_BUFFERS
87 if (ctx
->Polygon
.FrontFace
== GL_CCW
)
88 raster
->front_winding
= PIPE_WINDING_CCW
;
90 raster
->front_winding
= PIPE_WINDING_CW
;
93 * I think the intention here is that user-created framebuffer objects
94 * use Y=0=TOP layout instead of OpenGL's normal Y=0=bottom layout.
95 * Flipping Y changes CW to CCW and vice-versa.
96 * But this is an implementation/driver-specific artifact - remove...
98 if (ctx
->DrawBuffer
&& ctx
->DrawBuffer
->Name
!= 0)
99 raster
->front_winding
^= PIPE_WINDING_BOTH
;
104 if (ctx
->Light
.ShadeModel
== GL_FLAT
)
105 raster
->flatshade
= 1;
107 /* _NEW_LIGHT | _NEW_PROGRAM
109 * Back-face colors can come from traditional lighting (when
110 * GL_LIGHT_MODEL_TWO_SIDE is set) or from vertex programs (when
111 * GL_VERTEX_PROGRAM_TWO_SIDE is set). Note the logic here.
113 if (ctx
->VertexProgram
._Current
) {
114 if (ctx
->VertexProgram
._Enabled
) {
115 /* user-defined program */
116 raster
->light_twoside
= ctx
->VertexProgram
.TwoSideEnabled
;
119 /* TNL-generated program */
120 raster
->light_twoside
= ctx
->Light
.Enabled
&& ctx
->Light
.Model
.TwoSide
;
123 else if (ctx
->Light
.Enabled
&& ctx
->Light
.Model
.TwoSide
) {
124 raster
->light_twoside
= 1;
129 if (ctx
->Polygon
.CullFlag
) {
130 if (ctx
->Polygon
.CullFaceMode
== GL_FRONT_AND_BACK
) {
131 raster
->cull_mode
= PIPE_WINDING_BOTH
;
133 else if (ctx
->Polygon
.CullFaceMode
== GL_FRONT
) {
134 raster
->cull_mode
= raster
->front_winding
;
137 raster
->cull_mode
= raster
->front_winding
^ PIPE_WINDING_BOTH
;
144 GLuint fill_front
= translate_fill( ctx
->Polygon
.FrontMode
);
145 GLuint fill_back
= translate_fill( ctx
->Polygon
.BackMode
);
147 if (raster
->front_winding
== PIPE_WINDING_CW
) {
148 raster
->fill_cw
= fill_front
;
149 raster
->fill_ccw
= fill_back
;
152 raster
->fill_cw
= fill_back
;
153 raster
->fill_ccw
= fill_front
;
156 /* Simplify when culling is active:
158 if (raster
->cull_mode
& PIPE_WINDING_CW
) {
159 raster
->fill_cw
= raster
->fill_ccw
;
162 if (raster
->cull_mode
& PIPE_WINDING_CCW
) {
163 raster
->fill_ccw
= raster
->fill_cw
;
169 if (ctx
->Polygon
.OffsetUnits
!= 0.0 ||
170 ctx
->Polygon
.OffsetFactor
!= 0.0) {
171 raster
->offset_cw
= get_offset_flag( raster
->fill_cw
, &ctx
->Polygon
);
172 raster
->offset_ccw
= get_offset_flag( raster
->fill_ccw
, &ctx
->Polygon
);
173 raster
->offset_units
= ctx
->Polygon
.OffsetUnits
;
174 raster
->offset_scale
= ctx
->Polygon
.OffsetFactor
;
177 if (ctx
->Polygon
.SmoothFlag
)
178 raster
->poly_smooth
= 1;
180 if (ctx
->Polygon
.StippleFlag
)
181 raster
->poly_stipple_enable
= 1;
184 /* _NEW_BUFFERS, _NEW_POLYGON
186 if (raster
->fill_cw
!= PIPE_POLYGON_MODE_FILL
||
187 raster
->fill_ccw
!= PIPE_POLYGON_MODE_FILL
)
189 GLfloat mrd
= (ctx
->DrawBuffer
?
190 ctx
->DrawBuffer
->_MRD
:
193 raster
->offset_units
= ctx
->Polygon
.OffsetFactor
* mrd
;
194 raster
->offset_scale
= (ctx
->Polygon
.OffsetUnits
* mrd
*
195 st
->polygon_offset_scale
);
200 raster
->point_size
= ctx
->Point
.Size
;
202 raster
->point_size_min
= 0; /* temporary, will go away */
203 raster
->point_size_max
= 1000; /* temporary, will go away */
205 raster
->point_smooth
= ctx
->Point
.SmoothFlag
;
206 raster
->point_sprite
= ctx
->Point
.PointSprite
;
207 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
208 if (ctx
->Point
.CoordReplace
[i
]) {
209 if (ctx
->Point
.SpriteOrigin
== GL_UPPER_LEFT
)
210 raster
->sprite_coord_mode
[i
] = PIPE_SPRITE_COORD_UPPER_LEFT
;
212 raster
->sprite_coord_mode
[i
] = PIPE_SPRITE_COORD_LOWER_LEFT
;
215 raster
->sprite_coord_mode
[i
] = PIPE_SPRITE_COORD_NONE
;
219 if (vertProg
->Base
.Id
== 0) {
220 if (vertProg
->Base
.OutputsWritten
& (1 << VERT_RESULT_PSIZ
)) {
221 /* generated program which emits point size */
222 raster
->point_size_per_vertex
= TRUE
;
225 else if (ctx
->VertexProgram
.PointSizeEnabled
) {
226 /* user-defined program and GL_VERTEX_PROGRAM_POINT_SIZE set */
227 raster
->point_size_per_vertex
= ctx
->VertexProgram
.PointSizeEnabled
;
230 if (!raster
->point_size_per_vertex
) {
232 raster
->point_size
= CLAMP(ctx
->Point
.Size
,
239 raster
->line_smooth
= ctx
->Line
.SmoothFlag
;
240 if (ctx
->Line
.SmoothFlag
) {
241 raster
->line_width
= CLAMP(ctx
->Line
.Width
,
242 ctx
->Const
.MinLineWidthAA
,
243 ctx
->Const
.MaxLineWidthAA
);
246 raster
->line_width
= CLAMP(ctx
->Line
.Width
,
247 ctx
->Const
.MinLineWidth
,
248 ctx
->Const
.MaxLineWidth
);
251 raster
->line_stipple_enable
= ctx
->Line
.StippleFlag
;
252 raster
->line_stipple_pattern
= ctx
->Line
.StipplePattern
;
253 /* GL stipple factor is in [1,256], remap to [0, 255] here */
254 raster
->line_stipple_factor
= ctx
->Line
.StippleFactor
- 1;
256 /* _NEW_MULTISAMPLE */
257 if (ctx
->Multisample
._Enabled
)
258 raster
->multisample
= 1;
261 if (ctx
->Scissor
.Enabled
)
264 raster
->gl_rasterization_rules
= 1;
266 cso_set_rasterizer(st
->cso_context
, raster
);
269 const struct st_tracked_state st_update_rasterizer
= {
270 "st_update_rasterizer", /* name */
279 _NEW_SCISSOR
), /* mesa state dependencies*/
280 0, /* state tracker dependencies */
282 update_raster_state
/* update function */