X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fpolygon.c;h=192c40516fb50f308050073c9a0fdf862db4c1c8;hb=263581bba4d61291c54313648063a30c47106f0b;hp=396c897b70ea8810b449bbefb12d85693b9e9e09;hpb=08836341788a9f9d638d9dc8328510ccd18ddeb5;p=mesa.git

diff --git a/src/mesa/main/polygon.c b/src/mesa/main/polygon.c
index 396c897b70e..192c40516fb 100644
--- a/src/mesa/main/polygon.c
+++ b/src/mesa/main/polygon.c
@@ -1,10 +1,13 @@
-/* $Id: polygon.c,v 1.19 2001/03/03 20:33:27 brianp Exp $ */
+/**
+ * \file polygon.c
+ * Polygon operations.
+ */
 
 /*
  * Mesa 3-D graphics library
- * Version:  3.5
+ * Version:  4.1
  *
- * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -25,29 +28,35 @@
  */
 
 
-#ifdef PC_HEADER
-#include "all.h"
-#else
 #include "glheader.h"
+#include "imports.h"
 #include "context.h"
 #include "image.h"
 #include "enums.h"
 #include "macros.h"
-#include "mem.h"
 #include "polygon.h"
 #include "mtypes.h"
-#endif
-
 
 
-void
+/**
+ * Specify whether to cull front- or back-facing facets.
+ *
+ * \param mode culling mode.
+ *
+ * \sa glCullFace().
+ *
+ * Verifies the parameter and updates gl_polygon_attrib::CullFaceMode. On
+ * change, flushes the vertices and notifies the driver via
+ * the dd_function_table::CullFace callback.
+ */
+void GLAPIENTRY
 _mesa_CullFace( GLenum mode )
 {
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE&VERBOSE_API)
-      fprintf(stderr, "glCullFace %s\n", _mesa_lookup_enum_by_nr(mode));
+      _mesa_debug(ctx, "glCullFace %s\n", _mesa_lookup_enum_by_nr(mode));
 
    if (mode!=GL_FRONT && mode!=GL_BACK && mode!=GL_FRONT_AND_BACK) {
       _mesa_error( ctx, GL_INVALID_ENUM, "glCullFace" );
@@ -65,15 +74,25 @@ _mesa_CullFace( GLenum mode )
 }
 
 
-
-void
+/**
+ * Define front- and back-facing 
+ *
+ * \param mode orientation of front-facing polygons.
+ *
+ * \sa glFrontFace().
+ *
+ * Verifies the parameter and updates gl_polygon_attrib::FrontFace. On change
+ * flushes the vertices and notifies the driver via
+ * the dd_function_table::FrontFace callback.
+ */
+void GLAPIENTRY
 _mesa_FrontFace( GLenum mode )
 {
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE&VERBOSE_API)
-      fprintf(stderr, "glFrontFace %s\n", _mesa_lookup_enum_by_nr(mode));
+      _mesa_debug(ctx, "glFrontFace %s\n", _mesa_lookup_enum_by_nr(mode));
 
    if (mode!=GL_CW && mode!=GL_CCW) {
       _mesa_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
@@ -93,17 +112,28 @@ _mesa_FrontFace( GLenum mode )
 }
 
 
-
-void
+/**
+ * Set the polygon rasterization mode.
+ *
+ * \param face the polygons which \p mode applies to.
+ * \param mode how polygons should be rasterized.
+ *
+ * \sa glPolygonMode(). 
+ * 
+ * Verifies the parameters and updates gl_polygon_attrib::FrontMode and
+ * gl_polygon_attrib::BackMode. On change flushes the vertices and notifies the
+ * driver via the dd_function_table::PolygonMode callback.
+ */
+void GLAPIENTRY
 _mesa_PolygonMode( GLenum face, GLenum mode )
 {
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE&VERBOSE_API)
-      fprintf(stderr, "glPolygonMode %s %s\n",
-	      _mesa_lookup_enum_by_nr(face),
-	      _mesa_lookup_enum_by_nr(mode));
+      _mesa_debug(ctx, "glPolygonMode %s %s\n",
+                  _mesa_lookup_enum_by_nr(face),
+                  _mesa_lookup_enum_by_nr(mode));
 
    if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
       _mesa_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
@@ -137,7 +167,7 @@ _mesa_PolygonMode( GLenum face, GLenum mode )
    }
 
    ctx->_TriangleCaps &= ~DD_TRI_UNFILLED;
-   if (ctx->Polygon.FrontMode!=GL_FILL || ctx->Polygon.BackMode!=GL_FILL) 
+   if (ctx->Polygon.FrontMode!=GL_FILL || ctx->Polygon.BackMode!=GL_FILL)
       ctx->_TriangleCaps |= DD_TRI_UNFILLED;
 
    if (ctx->Driver.PolygonMode) {
@@ -145,16 +175,16 @@ _mesa_PolygonMode( GLenum face, GLenum mode )
    }
 }
 
+#if _HAVE_FULL_GL
 
-
-void
+void GLAPIENTRY
 _mesa_PolygonStipple( const GLubyte *pattern )
 {
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE&VERBOSE_API)
-      fprintf(stderr, "glPolygonStipple\n");
+      _mesa_debug(ctx, "glPolygonStipple\n");
 
    FLUSH_VERTICES(ctx, _NEW_POLYGONSTIPPLE);
    _mesa_unpack_polygon_stipple(pattern, ctx->PolygonStipple, &ctx->Unpack);
@@ -165,28 +195,27 @@ _mesa_PolygonStipple( const GLubyte *pattern )
 
 
 
-void
+void GLAPIENTRY
 _mesa_GetPolygonStipple( GLubyte *dest )
 {
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE&VERBOSE_API)
-      fprintf(stderr, "glGetPolygonStipple\n");
+      _mesa_debug(ctx, "glGetPolygonStipple\n");
 
    _mesa_pack_polygon_stipple(ctx->PolygonStipple, dest, &ctx->Pack);
 }
 
 
-
-void
+void GLAPIENTRY
 _mesa_PolygonOffset( GLfloat factor, GLfloat units )
 {
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE&VERBOSE_API)
-      fprintf(stderr, "glPolygonOffset %f %f\n", factor, units);
+      _mesa_debug(ctx, "glPolygonOffset %f %f\n", factor, units);
 
    if (ctx->Polygon.OffsetFactor == factor &&
        ctx->Polygon.OffsetUnits == units)
@@ -195,14 +224,81 @@ _mesa_PolygonOffset( GLfloat factor, GLfloat units )
    FLUSH_VERTICES(ctx, _NEW_POLYGON);
    ctx->Polygon.OffsetFactor = factor;
    ctx->Polygon.OffsetUnits = units;
-   ctx->Polygon.OffsetMRD = units * ctx->MRD;
+
+   if (ctx->Driver.PolygonOffset)
+      ctx->Driver.PolygonOffset( ctx, factor, units );
 }
 
 
 
-void
+void GLAPIENTRY
 _mesa_PolygonOffsetEXT( GLfloat factor, GLfloat bias )
 {
    GET_CURRENT_CONTEXT(ctx);
    _mesa_PolygonOffset(factor, bias * ctx->DepthMaxF );
 }
+
+#endif
+
+
+/**********************************************************************/
+/** \name State Management */
+/*@{*/
+
+/*
+ * Check polygon state and set DD_TRI_CULL_FRONT_BACK and/or DD_TRI_OFFSET
+ * in ctx->_TriangleCaps if needed.
+ */
+void _mesa_update_polygon( GLcontext *ctx )
+{
+   ctx->_TriangleCaps &= ~(DD_TRI_CULL_FRONT_BACK | DD_TRI_OFFSET);
+
+   if (ctx->Polygon.CullFlag && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
+      ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
+
+   /* Any Polygon offsets enabled? */
+   if (ctx->Polygon.OffsetPoint ||
+       ctx->Polygon.OffsetLine ||
+       ctx->Polygon.OffsetFill) {
+      ctx->_TriangleCaps |= DD_TRI_OFFSET;
+   }
+}
+
+/*@}*/
+
+
+/**********************************************************************/
+/** \name Initialization */
+/*@{*/
+
+/**
+ * Initialize the context polygon state.
+ *
+ * \param ctx GL context.
+ *
+ * Initializes __GLcontextRec::Polygon and __GLcontextRec::PolygonStipple
+ * attribute groups.
+ */
+void _mesa_init_polygon( GLcontext * ctx )
+{
+   /* Polygon group */
+   ctx->Polygon.CullFlag = GL_FALSE;
+   ctx->Polygon.CullFaceMode = GL_BACK;
+   ctx->Polygon.FrontFace = GL_CCW;
+   ctx->Polygon._FrontBit = 0;
+   ctx->Polygon.FrontMode = GL_FILL;
+   ctx->Polygon.BackMode = GL_FILL;
+   ctx->Polygon.SmoothFlag = GL_FALSE;
+   ctx->Polygon.StippleFlag = GL_FALSE;
+   ctx->Polygon.OffsetFactor = 0.0F;
+   ctx->Polygon.OffsetUnits = 0.0F;
+   ctx->Polygon.OffsetPoint = GL_FALSE;
+   ctx->Polygon.OffsetLine = GL_FALSE;
+   ctx->Polygon.OffsetFill = GL_FALSE;
+
+
+   /* Polygon Stipple group */
+   MEMSET( ctx->PolygonStipple, 0xff, 32*sizeof(GLuint) );
+}
+
+/*@}*/