src/mesa/main/polygon.c

   1 /* $Id: polygon.c,v 1.4 1999/10/08 09:27:11 keithw 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 #ifdef XFree86Server
  48 #include "GL/xf86glx.h"
  49 #endif
  50 #endif
  51
  52
  53
  54 void gl_CullFace( GLcontext *ctx, GLenum mode )
  55 {
  56    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCullFace");
  57
  58    if (MESA_VERBOSE&VERBOSE_API)
  59       fprintf(stderr, "glCullFace %s\n", gl_lookup_enum_by_nr(mode));
  60
  61    if (mode!=GL_FRONT && mode!=GL_BACK && mode!=GL_FRONT_AND_BACK) {
  62       gl_error( ctx, GL_INVALID_ENUM, "glCullFace" );
  63       return;
  64    }
  65
  66    ctx->Polygon.CullFaceMode = mode;
  67    ctx->NewState |= NEW_POLYGON;
  68
  69    if (ctx->Driver.CullFace)
  70       ctx->Driver.CullFace( ctx, mode );
  71 }
  72
  73
  74
  75 void gl_FrontFace( GLcontext *ctx, GLenum mode )
  76 {
  77    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFrontFace");
  78
  79    if (MESA_VERBOSE&VERBOSE_API)
  80       fprintf(stderr, "glFrontFace %s\n", gl_lookup_enum_by_nr(mode));
  81
  82    if (mode!=GL_CW && mode!=GL_CCW) {
  83       gl_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
  84       return;
  85    }
  86
  87    ctx->Polygon.FrontFace = mode;
  88    ctx->Polygon.FrontBit = (mode == GL_CW);
  89    ctx->NewState |= NEW_POLYGON;
  90
  91    if (ctx->Driver.FrontFace)
  92       ctx->Driver.FrontFace( ctx, mode );
  93 }
  94
  95
  96
  97 void gl_PolygonMode( GLcontext *ctx, GLenum face, GLenum mode )
  98 {
  99    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonMode");
 100
 101    if (MESA_VERBOSE&VERBOSE_API)
 102       fprintf(stderr, "glPolygonMode %s %s\n",
 103               gl_lookup_enum_by_nr(face),
 104               gl_lookup_enum_by_nr(mode));
 105
 106    if (face!=GL_FRONT && face!=GL_BACK && face!=GL_FRONT_AND_BACK) {
 107       gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(face)" );
 108       return;
 109    }
 110    else if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
 111       gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
 112       return;
 113    }
 114
 115    if (face==GL_FRONT || face==GL_FRONT_AND_BACK) {
 116       ctx->Polygon.FrontMode = mode;
 117    }
 118    if (face==GL_BACK || face==GL_FRONT_AND_BACK) {
 119       ctx->Polygon.BackMode = mode;
 120    }
 121
 122    /* Compute a handy "shortcut" value: */
 123    ctx->TriangleCaps &= ~DD_TRI_UNFILLED;
 124    ctx->Polygon.Unfilled = GL_FALSE;
 125
 126    if (ctx->Polygon.FrontMode!=GL_FILL || ctx->Polygon.BackMode!=GL_FILL) {
 127       ctx->Polygon.Unfilled = GL_TRUE;
 128       ctx->TriangleCaps |= DD_TRI_UNFILLED;
 129    }
 130
 131    ctx->NewState |= (NEW_POLYGON | NEW_RASTER_OPS);
 132
 133    if (ctx->Driver.PolygonMode) {
 134       (*ctx->Driver.PolygonMode)( ctx, face, mode );
 135    }
 136 }
 137
 138
 139
 140 /*
 141  * NOTE:  stipple pattern has already been unpacked.
 142  */
 143 void gl_PolygonStipple( GLcontext *ctx, const GLuint pattern[32] )
 144 {
 145    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonStipple");
 146
 147    if (MESA_VERBOSE&VERBOSE_API)
 148       fprintf(stderr, "glPolygonStipple\n");
 149
 150    MEMCPY( ctx->PolygonStipple, pattern, 32 * 4 );
 151
 152    if (ctx->Polygon.StippleFlag) {
 153       ctx->NewState |= NEW_RASTER_OPS;
 154    }
 155 }
 156
 157
 158
 159 void gl_GetPolygonStipple( GLcontext *ctx, GLubyte *dest )
 160 {
 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 gl_PolygonOffset( GLcontext *ctx,
 172                        GLfloat factor, GLfloat units )
 173 {
 174    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
 175
 176    if (MESA_VERBOSE&VERBOSE_API)
 177       fprintf(stderr, "glPolygonOffset %f %f\n", factor, units);
 178
 179    ctx->Polygon.OffsetFactor = factor;
 180    ctx->Polygon.OffsetUnits = units;
 181 }
 182