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 /* _NEW_RASTERIZER_DISCARD */
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_RASTERIZER_DISCARD |
259 _NEW_TRANSFORM), /* mesa state dependencies*/
260 ST_NEW_VERTEX_PROGRAM, /* state tracker dependencies */
262 update_raster_state /* update function */