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 if (ctx->Light.ShadeModel == GL_FLAT)
88 raster->flatshade = 1;
90 if (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION_EXT)
91 raster->flatshade_first = 1;
93 /* _NEW_LIGHT | _NEW_PROGRAM
95 * Back-face colors can come from traditional lighting (when
96 * GL_LIGHT_MODEL_TWO_SIDE is set) or from vertex programs/shaders (when
97 * GL_VERTEX_PROGRAM_TWO_SIDE is set). Note the logic here.
99 if (ctx->VertexProgram._Current) {
100 if (ctx->VertexProgram._Enabled ||
101 (ctx->Shader.CurrentVertexProgram &&
102 ctx->Shader.CurrentVertexProgram->LinkStatus)) {
103 /* user-defined vertex program or shader */
104 raster->light_twoside = ctx->VertexProgram.TwoSideEnabled;
107 /* TNL-generated program */
108 raster->light_twoside = ctx->Light.Enabled && ctx->Light.Model.TwoSide;
111 else if (ctx->Light.Enabled && ctx->Light.Model.TwoSide) {
112 raster->light_twoside = 1;
115 raster->clamp_vertex_color = ctx->Light._ClampVertexColor;
119 if (ctx->Polygon.CullFlag) {
120 switch (ctx->Polygon.CullFaceMode) {
122 raster->cull_face = PIPE_FACE_FRONT;
125 raster->cull_face = PIPE_FACE_BACK;
127 case GL_FRONT_AND_BACK:
128 raster->cull_face = PIPE_FACE_FRONT_AND_BACK;
133 raster->cull_face = PIPE_FACE_NONE;
139 raster->fill_front = translate_fill( ctx->Polygon.FrontMode );
140 raster->fill_back = translate_fill( ctx->Polygon.BackMode );
142 /* Simplify when culling is active:
144 if (raster->cull_face & PIPE_FACE_FRONT) {
145 raster->fill_front = raster->fill_back;
148 if (raster->cull_face & PIPE_FACE_BACK) {
149 raster->fill_back = raster->fill_front;
155 if (ctx->Polygon.OffsetUnits != 0.0 ||
156 ctx->Polygon.OffsetFactor != 0.0) {
157 raster->offset_point = ctx->Polygon.OffsetPoint;
158 raster->offset_line = ctx->Polygon.OffsetLine;
159 raster->offset_tri = ctx->Polygon.OffsetFill;
162 if (ctx->Polygon.OffsetPoint ||
163 ctx->Polygon.OffsetLine ||
164 ctx->Polygon.OffsetFill) {
165 raster->offset_units = ctx->Polygon.OffsetUnits;
166 raster->offset_scale = ctx->Polygon.OffsetFactor;
169 if (ctx->Polygon.SmoothFlag)
170 raster->poly_smooth = 1;
172 if (ctx->Polygon.StippleFlag)
173 raster->poly_stipple_enable = 1;
177 raster->point_size = ctx->Point.Size;
179 if (!ctx->Point.PointSprite && ctx->Point.SmoothFlag)
180 raster->point_smooth = 1;
182 /* _NEW_POINT | _NEW_PROGRAM
184 if (ctx->Point.PointSprite) {
186 if ((ctx->Point.SpriteOrigin == GL_UPPER_LEFT) ^
187 (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM))
188 raster->sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT;
190 raster->sprite_coord_mode = PIPE_SPRITE_COORD_LOWER_LEFT;
192 /* Coord replacement flags. If bit 'k' is set that means
193 * that we need to replace GENERIC[k] attrib with an automatically
194 * computed texture coord.
196 for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
197 if (ctx->Point.CoordReplace[i]) {
198 raster->sprite_coord_enable |= 1 << i;
201 if (fragProg->Base.InputsRead & FRAG_BIT_PNTC) {
202 raster->sprite_coord_enable |=
203 1 << (FRAG_ATTRIB_PNTC - FRAG_ATTRIB_TEX0);
206 raster->point_quad_rasterization = 1;
209 /* ST_NEW_VERTEX_PROGRAM
212 if (vertProg->Base.Id == 0) {
213 if (vertProg->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_PSIZ)) {
214 /* generated program which emits point size */
215 raster->point_size_per_vertex = TRUE;
218 else if (ctx->VertexProgram.PointSizeEnabled) {
219 /* user-defined program and GL_VERTEX_PROGRAM_POINT_SIZE set */
220 raster->point_size_per_vertex = ctx->VertexProgram.PointSizeEnabled;
223 if (!raster->point_size_per_vertex) {
225 raster->point_size = CLAMP(ctx->Point.Size,
232 raster->line_smooth = ctx->Line.SmoothFlag;
233 if (ctx->Line.SmoothFlag) {
234 raster->line_width = CLAMP(ctx->Line.Width,
235 ctx->Const.MinLineWidthAA,
236 ctx->Const.MaxLineWidthAA);
239 raster->line_width = CLAMP(ctx->Line.Width,
240 ctx->Const.MinLineWidth,
241 ctx->Const.MaxLineWidth);
244 raster->line_stipple_enable = ctx->Line.StippleFlag;
245 raster->line_stipple_pattern = ctx->Line.StipplePattern;
246 /* GL stipple factor is in [1,256], remap to [0, 255] here */
247 raster->line_stipple_factor = ctx->Line.StippleFactor - 1;
249 /* _NEW_MULTISAMPLE */
250 if (ctx->Multisample._Enabled || st->force_msaa)
251 raster->multisample = 1;
254 if (ctx->Scissor.Enabled)
257 /* _NEW_FRAG_CLAMP */
258 raster->clamp_fragment_color = ctx->Color._ClampFragmentColor;
260 raster->gl_rasterization_rules = 1;
262 cso_set_rasterizer(st->cso_context, raster);
265 const struct st_tracked_state st_update_rasterizer = {
266 "st_update_rasterizer", /* name */
276 _NEW_FRAG_CLAMP), /* mesa state dependencies*/
277 ST_NEW_VERTEX_PROGRAM, /* state tracker dependencies */
279 update_raster_state /* update function */