src/mesa/main/polygon.c

   1 /* $Id: polygon.c,v 1.5 1999/11/08 07:36:44 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.1
   6  *
   7  * Copyright (C) 1999  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 /* $XFree86: xc/lib/GL/mesa/src/polygon.c,v 1.3 1999/04/04 00:20:29 dawes Exp $ */
  29
  30 #ifdef PC_HEADER
  31 #include "all.h"
  32 #else
  33 #ifndef XFree86Server
  34 #include <assert.h>
  35 #include <stdlib.h>
  36 #include <stdio.h>
  37 #include <string.h>
  38 #else
  39 #include "GL/xf86glx.h"
  40 #endif
  41 #include "context.h"
  42 #include "image.h"
  43 #include "enums.h"
  44 #include "macros.h"
  45 #include "polygon.h"
  46 #include "types.h"
  47 #endif
  48
  49
  50
  51 void gl_CullFace( GLcontext *ctx, GLenum mode )
  52 {
  53    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCullFace");
  54
  55    if (MESA_VERBOSE&VERBOSE_API)
  56       fprintf(stderr, "glCullFace %s\n", gl_lookup_enum_by_nr(mode));
  57
  58    if (mode!=GL_FRONT && mode!=GL_BACK && mode!=GL_FRONT_AND_BACK) {
  59       gl_error( ctx, GL_INVALID_ENUM, "glCullFace" );
  60       return;
  61    }
  62
  63    ctx->Polygon.CullFaceMode = mode;
  64    ctx->NewState |= NEW_POLYGON;
  65
  66    if (ctx->Driver.CullFace)
  67       ctx->Driver.CullFace( ctx, mode );
  68 }
  69
  70
  71
  72 void gl_FrontFace( GLcontext *ctx, GLenum mode )
  73 {
  74    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFrontFace");
  75
  76    if (MESA_VERBOSE&VERBOSE_API)
  77       fprintf(stderr, "glFrontFace %s\n", gl_lookup_enum_by_nr(mode));
  78
  79    if (mode!=GL_CW && mode!=GL_CCW) {
  80       gl_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
  81       return;
  82    }
  83
  84    ctx->Polygon.FrontFace = mode;
  85    ctx->Polygon.FrontBit = (mode == GL_CW);
  86    ctx->NewState |= NEW_POLYGON;
  87
  88    if (ctx->Driver.FrontFace)
  89       ctx->Driver.FrontFace( ctx, mode );
  90 }
  91
  92
  93
  94 void gl_PolygonMode( GLcontext *ctx, GLenum face, GLenum mode )
  95 {
  96    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonMode");
  97
  98    if (MESA_VERBOSE&VERBOSE_API)
  99       fprintf(stderr, "glPolygonMode %s %s\n",
 100               gl_lookup_enum_by_nr(face),
 101               gl_lookup_enum_by_nr(mode));
 102
 103    if (face!=GL_FRONT && face!=GL_BACK && face!=GL_FRONT_AND_BACK) {
 104       gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(face)" );
 105       return;
 106    }
 107    else if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
 108       gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
 109       return;
 110    }
 111
 112    if (face==GL_FRONT || face==GL_FRONT_AND_BACK) {
 113       ctx->Polygon.FrontMode = mode;
 114    }
 115    if (face==GL_BACK || face==GL_FRONT_AND_BACK) {
 116       ctx->Polygon.BackMode = mode;
 117    }
 118
 119    /* Compute a handy "shortcut" value: */
 120    ctx->TriangleCaps &= ~DD_TRI_UNFILLED;
 121    ctx->Polygon.Unfilled = GL_FALSE;
 122
 123    if (ctx->Polygon.FrontMode!=GL_FILL || ctx->Polygon.BackMode!=GL_FILL) {
 124       ctx->Polygon.Unfilled = GL_TRUE;
 125       ctx->TriangleCaps |= DD_TRI_UNFILLED;
 126    }
 127
 128    ctx->NewState |= (NEW_POLYGON | NEW_RASTER_OPS);
 129
 130    if (ctx->Driver.PolygonMode) {
 131       (*ctx->Driver.PolygonMode)( ctx, face, mode );
 132    }
 133 }
 134
 135
 136
 137 /*
 138  * NOTE:  stipple pattern has already been unpacked.
 139  */
 140 void gl_PolygonStipple( GLcontext *ctx, const GLuint pattern[32] )
 141 {
 142    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonStipple");
 143
 144    if (MESA_VERBOSE&VERBOSE_API)
 145       fprintf(stderr, "glPolygonStipple\n");
 146
 147    MEMCPY( ctx->PolygonStipple, pattern, 32 * 4 );
 148
 149    if (ctx->Polygon.StippleFlag) {
 150       ctx->NewState |= NEW_RASTER_OPS;
 151    }
 152 }
 153
 154
 155
 156 void gl_GetPolygonStipple( GLcontext *ctx, GLubyte *dest )
 157 {
 158    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
 159
 160    if (MESA_VERBOSE&VERBOSE_API)
 161       fprintf(stderr, "glGetPolygonStipple\n");
 162
 163    gl_pack_polygon_stipple( ctx, ctx->PolygonStipple, dest );
 164 }
 165
 166
 167
 168 void gl_PolygonOffset( GLcontext *ctx,
 169                        GLfloat factor, GLfloat units )
 170 {
 171    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
 172
 173    if (MESA_VERBOSE&VERBOSE_API)
 174       fprintf(stderr, "glPolygonOffset %f %f\n", factor, units);
 175
 176    ctx->Polygon.OffsetFactor = factor;
 177    ctx->Polygon.OffsetUnits = units;
 178 }
 179