src/mesa/main/polygon.c

   1 /* $Id: polygon.c,v 1.7 1999/11/11 01:22:27 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.3
   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 #ifdef PC_HEADER
  29 #include "all.h"
  30 #else
  31 #include "glheader.h"
  32 #include "context.h"
  33 #include "image.h"
  34 #include "enums.h"
  35 #include "macros.h"
  36 #include "mem.h"
  37 #include "polygon.h"
  38 #include "types.h"
  39 #endif
  40
  41
  42
  43 void
  44 _mesa_CullFace( GLenum mode )
  45 {
  46    GET_CURRENT_CONTEXT(ctx);
  47    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCullFace");
  48
  49    if (MESA_VERBOSE&VERBOSE_API)
  50       fprintf(stderr, "glCullFace %s\n", gl_lookup_enum_by_nr(mode));
  51
  52    if (mode!=GL_FRONT && mode!=GL_BACK && mode!=GL_FRONT_AND_BACK) {
  53       gl_error( ctx, GL_INVALID_ENUM, "glCullFace" );
  54       return;
  55    }
  56
  57    ctx->Polygon.CullFaceMode = mode;
  58    ctx->NewState |= NEW_POLYGON;
  59
  60    if (ctx->Driver.CullFace)
  61       ctx->Driver.CullFace( ctx, mode );
  62 }
  63
  64
  65
  66 void
  67 _mesa_FrontFace( GLenum mode )
  68 {
  69    GET_CURRENT_CONTEXT(ctx);
  70    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFrontFace");
  71
  72    if (MESA_VERBOSE&VERBOSE_API)
  73       fprintf(stderr, "glFrontFace %s\n", gl_lookup_enum_by_nr(mode));
  74
  75    if (mode!=GL_CW && mode!=GL_CCW) {
  76       gl_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
  77       return;
  78    }
  79
  80    ctx->Polygon.FrontFace = mode;
  81    ctx->Polygon.FrontBit = (GLboolean) (mode == GL_CW);
  82    ctx->NewState |= NEW_POLYGON;
  83
  84    if (ctx->Driver.FrontFace)
  85       ctx->Driver.FrontFace( ctx, mode );
  86 }
  87
  88
  89
  90 void
  91 _mesa_PolygonMode( GLenum face, GLenum mode )
  92 {
  93    GET_CURRENT_CONTEXT(ctx);
  94    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonMode");
  95
  96    if (MESA_VERBOSE&VERBOSE_API)
  97       fprintf(stderr, "glPolygonMode %s %s\n",
  98               gl_lookup_enum_by_nr(face),
  99               gl_lookup_enum_by_nr(mode));
 100
 101    if (face!=GL_FRONT && face!=GL_BACK && face!=GL_FRONT_AND_BACK) {
 102       gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(face)" );
 103       return;
 104    }
 105    else if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
 106       gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
 107       return;
 108    }
 109
 110    if (face==GL_FRONT || face==GL_FRONT_AND_BACK) {
 111       ctx->Polygon.FrontMode = mode;
 112    }
 113    if (face==GL_BACK || face==GL_FRONT_AND_BACK) {
 114       ctx->Polygon.BackMode = mode;
 115    }
 116
 117    /* Compute a handy "shortcut" value: */
 118    ctx->TriangleCaps &= ~DD_TRI_UNFILLED;
 119    ctx->Polygon.Unfilled = GL_FALSE;
 120
 121    if (ctx->Polygon.FrontMode!=GL_FILL || ctx->Polygon.BackMode!=GL_FILL) {
 122       ctx->Polygon.Unfilled = GL_TRUE;
 123       ctx->TriangleCaps |= DD_TRI_UNFILLED;
 124    }
 125
 126    ctx->NewState |= (NEW_POLYGON | NEW_RASTER_OPS);
 127
 128    if (ctx->Driver.PolygonMode) {
 129       (*ctx->Driver.PolygonMode)( ctx, face, mode );
 130    }
 131 }
 132
 133
 134
 135 /*
 136  * NOTE:  stipple pattern has already been unpacked.
 137  */
 138 void
 139 _mesa_PolygonStipple( const GLubyte *mask )
 140 {
 141    GET_CURRENT_CONTEXT(ctx);
 142    GLuint *pattern = (GLuint *) mask;  /* XXX verify */
 143    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonStipple");
 144
 145    if (MESA_VERBOSE&VERBOSE_API)
 146       fprintf(stderr, "glPolygonStipple\n");
 147
 148    MEMCPY( ctx->PolygonStipple, pattern, 32 * 4 );
 149
 150    if (ctx->Polygon.StippleFlag) {
 151       ctx->NewState |= NEW_RASTER_OPS;
 152    }
 153 }
 154
 155
 156
 157 void
 158 _mesa_GetPolygonStipple( GLubyte *dest )
 159 {
 160    GET_CURRENT_CONTEXT(ctx);
 161    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
 162
 163    if (MESA_VERBOSE&VERBOSE_API)
 164       fprintf(stderr, "glGetPolygonStipple\n");
 165
 166    gl_pack_polygon_stipple( ctx, ctx->PolygonStipple, dest );
 167 }
 168
 169
 170
 171 void
 172 _mesa_PolygonOffset( GLfloat factor, GLfloat units )
 173 {
 174    GET_CURRENT_CONTEXT(ctx);
 175    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
 176
 177    if (MESA_VERBOSE&VERBOSE_API)
 178       fprintf(stderr, "glPolygonOffset %f %f\n", factor, units);
 179
 180    ctx->Polygon.OffsetFactor = factor;
 181    ctx->Polygon.OffsetUnits = units;
 182 }
 183
 184
 185 void
 186 _mesa_PolygonOffsetEXT( GLfloat factor, GLfloat bias )
 187 {
 188    _mesa_PolygonOffset(factor, bias * DEPTH_SCALE );
 189 }
 190