src/mesa/main/polygon.c

   1 /* $Id: polygon.c,v 1.2 1999/08/26 14:50:49 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 #ifdef PC_HEADER
  29 #include "all.h"
  30 #else
  31 #include <assert.h>
  32 #include <stdlib.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include "context.h"
  36 #include "image.h"
  37 #include "enums.h"
  38 #include "macros.h"
  39 #include "polygon.h"
  40 #include "types.h"
  41 #ifdef XFree86Server
  42 #include "GL/xf86glx.h"
  43 #endif
  44 #endif
  45
  46
  47
  48 void gl_CullFace( GLcontext *ctx, GLenum mode )
  49 {
  50    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCullFace");
  51
  52    if (MESA_VERBOSE&VERBOSE_API)
  53       fprintf(stderr, "glCullFace %s\n", gl_lookup_enum_by_nr(mode));
  54
  55    if (mode!=GL_FRONT && mode!=GL_BACK && mode!=GL_FRONT_AND_BACK) {
  56       gl_error( ctx, GL_INVALID_ENUM, "glCullFace" );
  57       return;
  58    }
  59
  60    ctx->Polygon.CullFaceMode = mode;
  61    ctx->NewState |= NEW_POLYGON;
  62
  63    if (ctx->Driver.CullFace)
  64       ctx->Driver.CullFace( ctx, mode );
  65 }
  66
  67
  68
  69 void gl_FrontFace( GLcontext *ctx, GLenum mode )
  70 {
  71    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFrontFace");
  72
  73    if (MESA_VERBOSE&VERBOSE_API)
  74       fprintf(stderr, "glFrontFace %s\n", gl_lookup_enum_by_nr(mode));
  75
  76    if (mode!=GL_CW && mode!=GL_CCW) {
  77       gl_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
  78       return;
  79    }
  80    ctx->Polygon.FrontFace = mode;
  81    ctx->Polygon.FrontBit = (mode == GL_CW);
  82
  83    if (ctx->Driver.FrontFace)
  84       ctx->Driver.FrontFace( ctx, mode );
  85 }
  86
  87
  88
  89 void gl_PolygonMode( GLcontext *ctx, GLenum face, GLenum mode )
  90 {
  91    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonMode");
  92
  93    if (MESA_VERBOSE&VERBOSE_API)
  94       fprintf(stderr, "glPolygonMode %s %s\n",
  95               gl_lookup_enum_by_nr(face),
  96               gl_lookup_enum_by_nr(mode));
  97
  98    if (face!=GL_FRONT && face!=GL_BACK && face!=GL_FRONT_AND_BACK) {
  99       gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(face)" );
 100       return;
 101    }
 102    else if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
 103       gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
 104       return;
 105    }
 106
 107    if (face==GL_FRONT || face==GL_FRONT_AND_BACK) {
 108       ctx->Polygon.FrontMode = mode;
 109    }
 110    if (face==GL_BACK || face==GL_FRONT_AND_BACK) {
 111       ctx->Polygon.BackMode = mode;
 112    }
 113
 114    /* Compute a handy "shortcut" value: */
 115    ctx->TriangleCaps &= ~DD_TRI_UNFILLED;
 116    ctx->Polygon.Unfilled = GL_FALSE;
 117
 118    if (ctx->Polygon.FrontMode!=GL_FILL || ctx->Polygon.BackMode!=GL_FILL) {
 119       ctx->Polygon.Unfilled = GL_TRUE;
 120       ctx->TriangleCaps |= DD_TRI_UNFILLED;
 121    }
 122
 123    ctx->NewState |= (NEW_POLYGON | NEW_RASTER_OPS);
 124
 125    if (ctx->Driver.PolygonMode) {
 126       (*ctx->Driver.PolygonMode)( ctx, face, mode );
 127    }
 128 }
 129
 130
 131
 132 /*
 133  * NOTE:  stipple pattern has already been unpacked.
 134  */
 135 void gl_PolygonStipple( GLcontext *ctx, const GLuint pattern[32] )
 136 {
 137    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonStipple");
 138
 139    if (MESA_VERBOSE&VERBOSE_API)
 140       fprintf(stderr, "glPolygonStipple\n");
 141
 142    MEMCPY( ctx->PolygonStipple, pattern, 32 * 4 );
 143
 144    if (ctx->Polygon.StippleFlag) {
 145       ctx->NewState |= NEW_RASTER_OPS;
 146    }
 147 }
 148
 149
 150
 151 void gl_GetPolygonStipple( GLcontext *ctx, GLubyte *dest )
 152 {
 153    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
 154
 155    if (MESA_VERBOSE&VERBOSE_API)
 156       fprintf(stderr, "glGetPolygonStipple\n");
 157
 158    gl_pack_polygon_stipple( ctx, ctx->PolygonStipple, dest );
 159 }
 160
 161
 162
 163 void gl_PolygonOffset( GLcontext *ctx,
 164                        GLfloat factor, GLfloat units )
 165 {
 166    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
 167
 168    if (MESA_VERBOSE&VERBOSE_API)
 169       fprintf(stderr, "glPolygonOffset %f %f\n", factor, units);
 170
 171    ctx->Polygon.OffsetFactor = factor;
 172    ctx->Polygon.OffsetUnits = units;
 173 }
 174