7 * Mesa 3-D graphics library
9 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice shall be included
19 * in all copies or substantial portions of the Software.
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
24 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
25 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
26 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
27 * OTHER DEALINGS IN THE SOFTWARE.
43 * Specify whether to cull front- or back-facing facets.
45 * \param mode culling mode.
49 * Verifies the parameter and updates gl_polygon_attrib::CullFaceMode. On
50 * change, flushes the vertices and notifies the driver via
51 * the dd_function_table::CullFace callback.
54 _mesa_CullFace( GLenum mode
)
56 GET_CURRENT_CONTEXT(ctx
);
58 if (MESA_VERBOSE
&VERBOSE_API
)
59 _mesa_debug(ctx
, "glCullFace %s\n", _mesa_enum_to_string(mode
));
61 if (mode
!=GL_FRONT
&& mode
!=GL_BACK
&& mode
!=GL_FRONT_AND_BACK
) {
62 _mesa_error( ctx
, GL_INVALID_ENUM
, "glCullFace" );
66 if (ctx
->Polygon
.CullFaceMode
== mode
)
69 FLUSH_VERTICES(ctx
, _NEW_POLYGON
);
70 ctx
->Polygon
.CullFaceMode
= mode
;
72 if (ctx
->Driver
.CullFace
)
73 ctx
->Driver
.CullFace( ctx
, mode
);
78 * Define front- and back-facing
80 * \param mode orientation of front-facing polygons.
84 * Verifies the parameter and updates gl_polygon_attrib::FrontFace. On change
85 * flushes the vertices and notifies the driver via
86 * the dd_function_table::FrontFace callback.
89 _mesa_FrontFace( GLenum mode
)
91 GET_CURRENT_CONTEXT(ctx
);
93 if (MESA_VERBOSE
&VERBOSE_API
)
94 _mesa_debug(ctx
, "glFrontFace %s\n", _mesa_enum_to_string(mode
));
96 if (ctx
->Polygon
.FrontFace
== mode
)
99 if (mode
!=GL_CW
&& mode
!=GL_CCW
) {
100 _mesa_error( ctx
, GL_INVALID_ENUM
, "glFrontFace" );
104 FLUSH_VERTICES(ctx
, _NEW_POLYGON
);
105 ctx
->Polygon
.FrontFace
= mode
;
107 if (ctx
->Driver
.FrontFace
)
108 ctx
->Driver
.FrontFace( ctx
, mode
);
113 * Set the polygon rasterization mode.
115 * \param face the polygons which \p mode applies to.
116 * \param mode how polygons should be rasterized.
118 * \sa glPolygonMode().
120 * Verifies the parameters and updates gl_polygon_attrib::FrontMode and
121 * gl_polygon_attrib::BackMode. On change flushes the vertices and notifies the
122 * driver via the dd_function_table::PolygonMode callback.
125 _mesa_PolygonMode( GLenum face
, GLenum mode
)
127 GET_CURRENT_CONTEXT(ctx
);
129 if (MESA_VERBOSE
&VERBOSE_API
)
130 _mesa_debug(ctx
, "glPolygonMode %s %s\n",
131 _mesa_enum_to_string(face
),
132 _mesa_enum_to_string(mode
));
134 if (mode
!=GL_POINT
&& mode
!=GL_LINE
&& mode
!=GL_FILL
) {
135 _mesa_error( ctx
, GL_INVALID_ENUM
, "glPolygonMode(mode)" );
141 if (ctx
->API
== API_OPENGL_CORE
) {
142 _mesa_error( ctx
, GL_INVALID_ENUM
, "glPolygonMode(face)" );
145 if (ctx
->Polygon
.FrontMode
== mode
)
147 FLUSH_VERTICES(ctx
, _NEW_POLYGON
);
148 ctx
->Polygon
.FrontMode
= mode
;
150 case GL_FRONT_AND_BACK
:
151 if (ctx
->Polygon
.FrontMode
== mode
&&
152 ctx
->Polygon
.BackMode
== mode
)
154 FLUSH_VERTICES(ctx
, _NEW_POLYGON
);
155 ctx
->Polygon
.FrontMode
= mode
;
156 ctx
->Polygon
.BackMode
= mode
;
159 if (ctx
->API
== API_OPENGL_CORE
) {
160 _mesa_error( ctx
, GL_INVALID_ENUM
, "glPolygonMode(face)" );
163 if (ctx
->Polygon
.BackMode
== mode
)
165 FLUSH_VERTICES(ctx
, _NEW_POLYGON
);
166 ctx
->Polygon
.BackMode
= mode
;
169 _mesa_error( ctx
, GL_INVALID_ENUM
, "glPolygonMode(face)" );
173 if (ctx
->Driver
.PolygonMode
)
174 ctx
->Driver
.PolygonMode(ctx
, face
, mode
);
179 * Called by glPolygonStipple.
182 _mesa_PolygonStipple(const GLubyte
*pattern
)
184 GET_CURRENT_CONTEXT(ctx
);
186 if (MESA_VERBOSE
& VERBOSE_API
)
187 _mesa_debug(ctx
, "glPolygonStipple\n");
189 FLUSH_VERTICES(ctx
, _NEW_POLYGONSTIPPLE
);
191 pattern
= _mesa_map_validate_pbo_source(ctx
, 2,
192 &ctx
->Unpack
, 32, 32, 1,
193 GL_COLOR_INDEX
, GL_BITMAP
,
199 _mesa_unpack_polygon_stipple(pattern
, ctx
->PolygonStipple
, &ctx
->Unpack
);
201 _mesa_unmap_pbo_source(ctx
, &ctx
->Unpack
);
203 if (ctx
->Driver
.PolygonStipple
)
204 ctx
->Driver
.PolygonStipple(ctx
, pattern
);
209 * Called by glPolygonStipple.
212 _mesa_GetnPolygonStippleARB( GLsizei bufSize
, GLubyte
*dest
)
214 GET_CURRENT_CONTEXT(ctx
);
216 if (MESA_VERBOSE
&VERBOSE_API
)
217 _mesa_debug(ctx
, "glGetPolygonStipple\n");
219 dest
= _mesa_map_validate_pbo_dest(ctx
, 2,
220 &ctx
->Pack
, 32, 32, 1,
221 GL_COLOR_INDEX
, GL_BITMAP
,
222 bufSize
, dest
, "glGetPolygonStipple");
226 _mesa_pack_polygon_stipple(ctx
->PolygonStipple
, dest
, &ctx
->Pack
);
228 _mesa_unmap_pbo_dest(ctx
, &ctx
->Pack
);
233 _mesa_GetPolygonStipple( GLubyte
*dest
)
235 _mesa_GetnPolygonStippleARB(INT_MAX
, dest
);
239 _mesa_polygon_offset_clamp(struct gl_context
*ctx
,
240 GLfloat factor
, GLfloat units
, GLfloat clamp
)
242 if (ctx
->Polygon
.OffsetFactor
== factor
&&
243 ctx
->Polygon
.OffsetUnits
== units
&&
244 ctx
->Polygon
.OffsetClamp
== clamp
)
247 FLUSH_VERTICES(ctx
, _NEW_POLYGON
);
248 ctx
->Polygon
.OffsetFactor
= factor
;
249 ctx
->Polygon
.OffsetUnits
= units
;
250 ctx
->Polygon
.OffsetClamp
= clamp
;
252 if (ctx
->Driver
.PolygonOffset
)
253 ctx
->Driver
.PolygonOffset( ctx
, factor
, units
, clamp
);
257 _mesa_PolygonOffset( GLfloat factor
, GLfloat units
)
259 GET_CURRENT_CONTEXT(ctx
);
261 if (MESA_VERBOSE
&VERBOSE_API
)
262 _mesa_debug(ctx
, "glPolygonOffset %f %f\n", factor
, units
);
264 _mesa_polygon_offset_clamp(ctx
, factor
, units
, 0.0);
269 _mesa_PolygonOffsetEXT( GLfloat factor
, GLfloat bias
)
271 GET_CURRENT_CONTEXT(ctx
);
272 /* XXX mult by DepthMaxF here??? */
273 _mesa_PolygonOffset(factor
, bias
* ctx
->DrawBuffer
->_DepthMaxF
);
277 _mesa_PolygonOffsetClampEXT( GLfloat factor
, GLfloat units
, GLfloat clamp
)
279 GET_CURRENT_CONTEXT(ctx
);
281 if (!ctx
->Extensions
.EXT_polygon_offset_clamp
) {
282 _mesa_error(ctx
, GL_INVALID_OPERATION
,
283 "unsupported function (glPolygonOffsetClampEXT) called");
287 if (MESA_VERBOSE
&VERBOSE_API
)
288 _mesa_debug(ctx
, "glPolygonOffsetClampEXT %f %f %f\n", factor
, units
, clamp
);
290 _mesa_polygon_offset_clamp(ctx
, factor
, units
, clamp
);
295 /**********************************************************************/
296 /** \name Initialization */
300 * Initialize the context polygon state.
302 * \param ctx GL context.
304 * Initializes __struct gl_contextRec::Polygon and __struct gl_contextRec::PolygonStipple
307 void _mesa_init_polygon( struct gl_context
* ctx
)
310 ctx
->Polygon
.CullFlag
= GL_FALSE
;
311 ctx
->Polygon
.CullFaceMode
= GL_BACK
;
312 ctx
->Polygon
.FrontFace
= GL_CCW
;
313 ctx
->Polygon
._FrontBit
= 0;
314 ctx
->Polygon
.FrontMode
= GL_FILL
;
315 ctx
->Polygon
.BackMode
= GL_FILL
;
316 ctx
->Polygon
.SmoothFlag
= GL_FALSE
;
317 ctx
->Polygon
.StippleFlag
= GL_FALSE
;
318 ctx
->Polygon
.OffsetFactor
= 0.0F
;
319 ctx
->Polygon
.OffsetUnits
= 0.0F
;
320 ctx
->Polygon
.OffsetClamp
= 0.0F
;
321 ctx
->Polygon
.OffsetPoint
= GL_FALSE
;
322 ctx
->Polygon
.OffsetLine
= GL_FALSE
;
323 ctx
->Polygon
.OffsetFill
= GL_FALSE
;
326 /* Polygon Stipple group */
327 memset( ctx
->PolygonStipple
, 0xff, 32*sizeof(GLuint
) );