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 * Gallium's surfaces are Y=0=TOP orientation. OpenGL is the
75 * opposite. Window system surfaces are Y=0=TOP. Mesa's FBOs
76 * must match OpenGL conventions so FBOs use Y=0=BOTTOM. In that
77 * case, we must invert Y and flip the notion of front vs. back.
79 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
) {
80 /* Drawing to an FBO. The viewport will be inverted. */
81 raster
->front_ccw
^= 1;
87 raster
->flatshade
= ctx
->Light
.ShadeModel
== GL_FLAT
;
89 raster
->flatshade_first
= ctx
->Light
.ProvokingVertex
==
90 GL_FIRST_VERTEX_CONVENTION_EXT
;
92 /* _NEW_LIGHT | _NEW_PROGRAM */
93 raster
->light_twoside
= ctx
->VertexProgram
._TwoSideEnabled
;
95 /*_NEW_LIGHT | _NEW_BUFFERS */
96 raster
->clamp_vertex_color
= !st
->clamp_vert_color_in_shader
&&
97 ctx
->Light
._ClampVertexColor
;
101 if (ctx
->Polygon
.CullFlag
) {
102 switch (ctx
->Polygon
.CullFaceMode
) {
104 raster
->cull_face
= PIPE_FACE_FRONT
;
107 raster
->cull_face
= PIPE_FACE_BACK
;
109 case GL_FRONT_AND_BACK
:
110 raster
->cull_face
= PIPE_FACE_FRONT_AND_BACK
;
115 raster
->cull_face
= PIPE_FACE_NONE
;
121 raster
->fill_front
= translate_fill( ctx
->Polygon
.FrontMode
);
122 raster
->fill_back
= translate_fill( ctx
->Polygon
.BackMode
);
124 /* Simplify when culling is active:
126 if (raster
->cull_face
& PIPE_FACE_FRONT
) {
127 raster
->fill_front
= raster
->fill_back
;
130 if (raster
->cull_face
& PIPE_FACE_BACK
) {
131 raster
->fill_back
= raster
->fill_front
;
137 if (ctx
->Polygon
.OffsetPoint
||
138 ctx
->Polygon
.OffsetLine
||
139 ctx
->Polygon
.OffsetFill
) {
140 raster
->offset_point
= ctx
->Polygon
.OffsetPoint
;
141 raster
->offset_line
= ctx
->Polygon
.OffsetLine
;
142 raster
->offset_tri
= ctx
->Polygon
.OffsetFill
;
143 raster
->offset_units
= ctx
->Polygon
.OffsetUnits
;
144 raster
->offset_scale
= ctx
->Polygon
.OffsetFactor
;
147 raster
->poly_smooth
= ctx
->Polygon
.SmoothFlag
;
148 raster
->poly_stipple_enable
= ctx
->Polygon
.StippleFlag
;
152 raster
->point_size
= ctx
->Point
.Size
;
153 raster
->point_smooth
= !ctx
->Point
.PointSprite
&& ctx
->Point
.SmoothFlag
;
155 /* _NEW_POINT | _NEW_PROGRAM
157 if (ctx
->Point
.PointSprite
) {
159 if ((ctx
->Point
.SpriteOrigin
== GL_UPPER_LEFT
) ^
160 (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
))
161 raster
->sprite_coord_mode
= PIPE_SPRITE_COORD_UPPER_LEFT
;
163 raster
->sprite_coord_mode
= PIPE_SPRITE_COORD_LOWER_LEFT
;
165 /* Coord replacement flags. If bit 'k' is set that means
166 * that we need to replace GENERIC[k] attrib with an automatically
167 * computed texture coord.
169 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
170 if (ctx
->Point
.CoordReplace
[i
]) {
171 raster
->sprite_coord_enable
|= 1 << i
;
174 if (fragProg
->Base
.InputsRead
& VARYING_BIT_PNTC
) {
175 raster
->sprite_coord_enable
|=
176 1 << (VARYING_SLOT_PNTC
- VARYING_SLOT_TEX0
);
179 raster
->point_quad_rasterization
= 1;
182 /* ST_NEW_VERTEX_PROGRAM
185 if (vertProg
->Base
.Id
== 0) {
186 if (vertProg
->Base
.OutputsWritten
& BITFIELD64_BIT(VARYING_SLOT_PSIZ
)) {
187 /* generated program which emits point size */
188 raster
->point_size_per_vertex
= TRUE
;
191 else if (ctx
->VertexProgram
.PointSizeEnabled
) {
192 /* user-defined program and GL_VERTEX_PROGRAM_POINT_SIZE set */
193 raster
->point_size_per_vertex
= ctx
->VertexProgram
.PointSizeEnabled
;
196 if (!raster
->point_size_per_vertex
) {
198 raster
->point_size
= CLAMP(ctx
->Point
.Size
,
205 raster
->line_smooth
= ctx
->Line
.SmoothFlag
;
206 if (ctx
->Line
.SmoothFlag
) {
207 raster
->line_width
= CLAMP(ctx
->Line
.Width
,
208 ctx
->Const
.MinLineWidthAA
,
209 ctx
->Const
.MaxLineWidthAA
);
212 raster
->line_width
= CLAMP(ctx
->Line
.Width
,
213 ctx
->Const
.MinLineWidth
,
214 ctx
->Const
.MaxLineWidth
);
217 raster
->line_stipple_enable
= ctx
->Line
.StippleFlag
;
218 raster
->line_stipple_pattern
= ctx
->Line
.StipplePattern
;
219 /* GL stipple factor is in [1,256], remap to [0, 255] here */
220 raster
->line_stipple_factor
= ctx
->Line
.StippleFactor
- 1;
222 /* _NEW_MULTISAMPLE */
223 raster
->multisample
= ctx
->Multisample
._Enabled
;
226 raster
->scissor
= ctx
->Scissor
.Enabled
;
228 /* _NEW_FRAG_CLAMP */
229 raster
->clamp_fragment_color
= !st
->clamp_frag_color_in_shader
&&
230 ctx
->Color
._ClampFragmentColor
;
232 raster
->half_pixel_center
= 1;
233 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
)
234 raster
->bottom_edge_rule
= 1;
236 /* ST_NEW_RASTERIZER */
237 raster
->rasterizer_discard
= ctx
->RasterDiscard
;
240 raster
->depth_clip
= ctx
->Transform
.DepthClamp
== GL_FALSE
;
241 raster
->clip_plane_enable
= ctx
->Transform
.ClipPlanesEnabled
;
243 cso_set_rasterizer(st
->cso_context
, raster
);
246 const struct st_tracked_state st_update_rasterizer
= {
247 "st_update_rasterizer", /* name */
258 _NEW_TRANSFORM
), /* mesa state dependencies*/
259 (ST_NEW_VERTEX_PROGRAM
|
260 ST_NEW_RASTERIZER
), /* state tracker dependencies */
262 update_raster_state
/* update function */