-/* $Id: polygon.c,v 1.15 2000/11/05 18:40:58 keithw Exp $ */
+/**
+ * \file polygon.c
+ * Polygon operations.
+ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
- *
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
- *
+ *
+ * Copyright (C) 1999-2006 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"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
- *
+ *
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
- *
+ *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
*/
-#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 "pack.h"
+#include "pbo.h"
#include "polygon.h"
-#include "types.h"
-#endif
-
-
-
-void
+#include "mtypes.h"
+
+
+/**
+ * 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_AND_FLUSH(ctx, "glCullFace");
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glCullFace %s\n", gl_lookup_enum_by_nr(mode));
+ _mesa_debug(ctx, "glCullFace %s\n", _mesa_enum_to_string(mode));
if (mode!=GL_FRONT && mode!=GL_BACK && mode!=GL_FRONT_AND_BACK) {
- gl_error( ctx, GL_INVALID_ENUM, "glCullFace" );
+ _mesa_error( ctx, GL_INVALID_ENUM, "glCullFace" );
return;
}
+ if (ctx->Polygon.CullFaceMode == mode)
+ return;
+
+ FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.CullFaceMode = mode;
- ctx->NewState |= _NEW_POLYGON;
if (ctx->Driver.CullFace)
ctx->Driver.CullFace( ctx, 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_AND_FLUSH(ctx, "glFrontFace");
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glFrontFace %s\n", gl_lookup_enum_by_nr(mode));
+ _mesa_debug(ctx, "glFrontFace %s\n", _mesa_enum_to_string(mode));
+
+ if (ctx->Polygon.FrontFace == mode)
+ return;
if (mode!=GL_CW && mode!=GL_CCW) {
- gl_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
+ _mesa_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
return;
}
+ FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.FrontFace = mode;
- ctx->Polygon.FrontBit = (GLboolean) (mode == GL_CW);
- ctx->NewState |= _NEW_POLYGON;
if (ctx->Driver.FrontFace)
ctx->Driver.FrontFace( ctx, 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_AND_FLUSH(ctx, "glPolygonMode");
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glPolygonMode %s %s\n",
- gl_lookup_enum_by_nr(face),
- gl_lookup_enum_by_nr(mode));
+ _mesa_debug(ctx, "glPolygonMode %s %s\n",
+ _mesa_enum_to_string(face),
+ _mesa_enum_to_string(mode));
- if (face!=GL_FRONT && face!=GL_BACK && face!=GL_FRONT_AND_BACK) {
- gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(face)" );
- return;
- }
- else if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
- gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
+ if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
return;
}
- if (face==GL_FRONT || face==GL_FRONT_AND_BACK) {
+ switch (face) {
+ case GL_FRONT:
+ if (ctx->API == API_OPENGL_CORE) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glPolygonMode(face)" );
+ return;
+ }
+ if (ctx->Polygon.FrontMode == mode)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POLYGON);
+ ctx->Polygon.FrontMode = mode;
+ break;
+ case GL_FRONT_AND_BACK:
+ if (ctx->Polygon.FrontMode == mode &&
+ ctx->Polygon.BackMode == mode)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.FrontMode = mode;
- }
- if (face==GL_BACK || face==GL_FRONT_AND_BACK) {
ctx->Polygon.BackMode = mode;
+ break;
+ case GL_BACK:
+ if (ctx->API == API_OPENGL_CORE) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glPolygonMode(face)" );
+ return;
+ }
+ if (ctx->Polygon.BackMode == mode)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POLYGON);
+ ctx->Polygon.BackMode = mode;
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glPolygonMode(face)" );
+ return;
}
- /* Compute a handy "shortcut" value: */
- ctx->_TriangleCaps &= ~DD_TRI_UNFILLED;
- ctx->Polygon._Unfilled = GL_FALSE;
-
- if (ctx->Polygon.FrontMode!=GL_FILL || ctx->Polygon.BackMode!=GL_FILL) {
- ctx->Polygon._Unfilled = GL_TRUE;
- ctx->_TriangleCaps |= DD_TRI_UNFILLED;
- }
-
- ctx->NewState |= _NEW_POLYGON;
-
- if (ctx->Driver.PolygonMode) {
- (*ctx->Driver.PolygonMode)( ctx, face, mode );
- }
+ if (ctx->Driver.PolygonMode)
+ ctx->Driver.PolygonMode(ctx, face, mode);
}
-
-void
-_mesa_PolygonStipple( const GLubyte *pattern )
+/**
+ * Called by glPolygonStipple.
+ */
+void GLAPIENTRY
+_mesa_PolygonStipple(const GLubyte *pattern)
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonStipple");
- if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glPolygonStipple\n");
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glPolygonStipple\n");
+
+ FLUSH_VERTICES(ctx, _NEW_POLYGONSTIPPLE);
+
+ pattern = _mesa_map_validate_pbo_source(ctx, 2,
+ &ctx->Unpack, 32, 32, 1,
+ GL_COLOR_INDEX, GL_BITMAP,
+ INT_MAX, pattern,
+ "glPolygonStipple");
+ if (!pattern)
+ return;
_mesa_unpack_polygon_stipple(pattern, ctx->PolygonStipple, &ctx->Unpack);
- ctx->NewState |= _NEW_POLYGONSTIPPLE;
-
+ _mesa_unmap_pbo_source(ctx, &ctx->Unpack);
+
if (ctx->Driver.PolygonStipple)
- ctx->Driver.PolygonStipple( ctx, (const GLubyte *) ctx->PolygonStipple );
+ ctx->Driver.PolygonStipple(ctx, pattern);
}
-
-void
-_mesa_GetPolygonStipple( GLubyte *dest )
+/**
+ * Called by glPolygonStipple.
+ */
+void GLAPIENTRY
+_mesa_GetnPolygonStippleARB( GLsizei bufSize, GLubyte *dest )
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glGetPolygonStipple\n");
+ _mesa_debug(ctx, "glGetPolygonStipple\n");
+
+ dest = _mesa_map_validate_pbo_dest(ctx, 2,
+ &ctx->Pack, 32, 32, 1,
+ GL_COLOR_INDEX, GL_BITMAP,
+ bufSize, dest, "glGetPolygonStipple");
+ if (!dest)
+ return;
_mesa_pack_polygon_stipple(ctx->PolygonStipple, dest, &ctx->Pack);
+
+ _mesa_unmap_pbo_dest(ctx, &ctx->Pack);
}
+void GLAPIENTRY
+_mesa_GetPolygonStipple( GLubyte *dest )
+{
+ _mesa_GetnPolygonStippleARB(INT_MAX, dest);
+}
void
+_mesa_polygon_offset_clamp(struct gl_context *ctx,
+ GLfloat factor, GLfloat units, GLfloat clamp)
+{
+ if (ctx->Polygon.OffsetFactor == factor &&
+ ctx->Polygon.OffsetUnits == units &&
+ ctx->Polygon.OffsetClamp == clamp)
+ return;
+
+ FLUSH_VERTICES(ctx, _NEW_POLYGON);
+ ctx->Polygon.OffsetFactor = factor;
+ ctx->Polygon.OffsetUnits = units;
+ ctx->Polygon.OffsetClamp = clamp;
+
+ if (ctx->Driver.PolygonOffset)
+ ctx->Driver.PolygonOffset( ctx, factor, units, clamp );
+}
+
+void GLAPIENTRY
_mesa_PolygonOffset( GLfloat factor, GLfloat units )
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glPolygonOffset %f %f\n", factor, units);
+ _mesa_debug(ctx, "glPolygonOffset %f %f\n", factor, units);
- ctx->Polygon.OffsetFactor = factor;
- ctx->Polygon.OffsetUnits = units;
- ctx->Polygon.OffsetMRD = units * ctx->Visual.MRD;
- ctx->NewState |= _NEW_POLYGON;
+ _mesa_polygon_offset_clamp(ctx, factor, units, 0.0);
}
-
-void
+void GLAPIENTRY
_mesa_PolygonOffsetEXT( GLfloat factor, GLfloat bias )
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffsetEXT");
- _mesa_PolygonOffset(factor, bias * ctx->Visual.DepthMaxF );
+ /* XXX mult by DepthMaxF here??? */
+ _mesa_PolygonOffset(factor, bias * ctx->DrawBuffer->_DepthMaxF );
+}
+
+void GLAPIENTRY
+_mesa_PolygonOffsetClampEXT( GLfloat factor, GLfloat units, GLfloat clamp )
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (!ctx->Extensions.EXT_polygon_offset_clamp) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "unsupported function (glPolygonOffsetClampEXT) called");
+ return;
+ }
+
+ if (MESA_VERBOSE&VERBOSE_API)
+ _mesa_debug(ctx, "glPolygonOffsetClampEXT %f %f %f\n", factor, units, clamp);
+
+ _mesa_polygon_offset_clamp(ctx, factor, units, clamp);
+}
+
+
+
+/**********************************************************************/
+/** \name Initialization */
+/*@{*/
+
+/**
+ * Initialize the context polygon state.
+ *
+ * \param ctx GL context.
+ *
+ * Initializes __struct gl_contextRec::Polygon and __struct gl_contextRec::PolygonStipple
+ * attribute groups.
+ */
+void _mesa_init_polygon( struct gl_context * 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.OffsetClamp = 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) );
}
+
+/*@}*/
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