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>
34 #include "st_context.h"
36 #include "pipe/p_context.h"
37 #include "pipe/p_defines.h"
40 static GLuint
translate_fill( GLenum mode
)
44 return PIPE_POLYGON_MODE_POINT
;
46 return PIPE_POLYGON_MODE_LINE
;
48 return PIPE_POLYGON_MODE_FILL
;
55 static GLboolean
get_offset_flag( GLuint fill_mode
,
56 const struct gl_polygon_attrib
*p
)
59 case PIPE_POLYGON_MODE_POINT
:
60 return p
->OffsetPoint
;
61 case PIPE_POLYGON_MODE_LINE
:
63 case PIPE_POLYGON_MODE_FILL
:
72 static void update_raster_state( struct st_context
*st
)
74 GLcontext
*ctx
= st
->ctx
;
75 struct pipe_rasterizer_state raster
;
76 const struct cso_rasterizer
*cso
;
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
;
201 raster
.point_smooth
= ctx
->Point
.SmoothFlag
;
202 raster
.point_sprite
= ctx
->Point
.PointSprite
;
203 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
204 if (ctx
->Point
.CoordReplace
[i
]) {
205 if (ctx
->Point
.SpriteOrigin
== GL_UPPER_LEFT
)
206 raster
.sprite_coord_mode
[i
] = PIPE_SPRITE_COORD_UPPER_LEFT
;
208 raster
.sprite_coord_mode
[i
] = PIPE_SPRITE_COORD_LOWER_LEFT
;
211 raster
.sprite_coord_mode
[i
] = PIPE_SPRITE_COORD_NONE
;
215 if (vertProg
->Base
.Id
== 0) {
216 if (vertProg
->Base
.OutputsWritten
& (1 << VERT_RESULT_PSIZ
)) {
217 /* generated program which emits point size */
218 raster
.point_size_per_vertex
= TRUE
;
221 else if (ctx
->VertexProgram
.PointSizeEnabled
) {
222 /* user-defined program and GL_VERTEX_PROGRAM_POINT_SIZE set */
223 raster
.point_size_per_vertex
= ctx
->VertexProgram
.PointSizeEnabled
;
230 raster
.line_width
= ctx
->Line
.Width
;
231 raster
.line_smooth
= ctx
->Line
.SmoothFlag
;
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 if (ctx
->Multisample
.Enabled
)
239 raster
.multisample
= 1;
242 if (ctx
->Scissor
.Enabled
)
245 cso
= st_cached_rasterizer_state(st
, &raster
);
246 if (st
->state
.rasterizer
!= cso
) {
247 st
->state
.rasterizer
= cso
;
248 st
->pipe
->bind_rasterizer_state(st
->pipe
, cso
->data
);
252 const struct st_tracked_state st_update_rasterizer
= {
253 .name
= "st_update_rasterizer",
255 .mesa
= (_NEW_LIGHT
| _NEW_POLYGON
| _NEW_LINE
| _NEW_SCISSOR
|
256 _NEW_POINT
| _NEW_BUFFERS
| _NEW_MULTISAMPLE
),
259 .update
= update_raster_state