-/* $Id: polygon.c,v 1.3 1999/09/20 14:30:22 keithw Exp $ */
+/**
+ * \file polygon.c
+ * Polygon operations.
+ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
- *
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
- *
+ * Version: 6.5.1
+ *
+ * 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
*/
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <assert.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
+#include "glheader.h"
+#include "imports.h"
+#include "bufferobj.h"
#include "context.h"
#include "image.h"
#include "enums.h"
#include "macros.h"
#include "polygon.h"
-#include "types.h"
-#ifdef XFree86Server
-#include "GL/xf86glx.h"
-#endif
-#endif
-
-
-
-void gl_CullFace( GLcontext *ctx, GLenum mode )
+#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 )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCullFace");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glCullFace %s\n", gl_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) {
- 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 gl_FrontFace( GLcontext *ctx, GLenum mode )
+/**
+ * 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 )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFrontFace");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glFrontFace %s\n", gl_lookup_enum_by_nr(mode));
+ _mesa_debug(ctx, "glFrontFace %s\n", _mesa_lookup_enum_by_nr(mode));
if (mode!=GL_CW && mode!=GL_CCW) {
- gl_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
+ _mesa_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
return;
}
+ if (ctx->Polygon.FrontFace == mode)
+ return;
+
+ FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.FrontFace = mode;
- ctx->Polygon.FrontBit = (mode == GL_CW);
- ctx->NewState |= NEW_POLYGON;
+
+ ctx->Polygon._FrontBit = (GLboolean) (mode == GL_CW);
if (ctx->Driver.FrontFace)
ctx->Driver.FrontFace( ctx, mode );
}
-
-void gl_PolygonMode( GLcontext *ctx, GLenum face, GLenum mode )
+/**
+ * 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 )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonMode");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
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_lookup_enum_by_nr(face),
+ _mesa_lookup_enum_by_nr(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->Polygon.FrontMode == mode)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.FrontMode = mode;
- }
- if (face==GL_BACK || face==GL_FRONT_AND_BACK) {
+ 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;
+ ctx->Polygon.BackMode = mode;
+ break;
+ case GL_BACK:
+ 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->_TriangleCaps &= ~DD_TRI_UNFILLED;
+ else
+ ctx->_TriangleCaps |= DD_TRI_UNFILLED;
- if (ctx->Polygon.FrontMode!=GL_FILL || ctx->Polygon.BackMode!=GL_FILL) {
- ctx->Polygon.Unfilled = GL_TRUE;
- ctx->TriangleCaps |= DD_TRI_UNFILLED;
- }
+ if (ctx->Driver.PolygonMode)
+ ctx->Driver.PolygonMode(ctx, face, mode);
+}
- ctx->NewState |= (NEW_POLYGON | NEW_RASTER_OPS);
+#if _HAVE_FULL_GL
- if (ctx->Driver.PolygonMode) {
- (*ctx->Driver.PolygonMode)( ctx, face, mode );
+
+/**
+ * This routine updates the ctx->Polygon.Stipple state.
+ * If we're getting the stipple data from a PBO, we map the buffer
+ * in order to access the data.
+ * In any case, we obey the current pixel unpacking parameters when fetching
+ * the stipple data.
+ *
+ * In the future, this routine should be used as a fallback, called via
+ * ctx->Driver.PolygonStipple(). We'll have to update all the DRI drivers
+ * too.
+ */
+void
+_mesa_polygon_stipple(GLcontext *ctx, const GLubyte *pattern)
+{
+ if (ctx->Unpack.BufferObj->Name) {
+ /* Get/unpack the stipple pattern from a PBO */
+ GLubyte *buf;
+ if (!_mesa_validate_pbo_access(2, &ctx->Unpack, 32, 32, 1,
+ GL_COLOR_INDEX, GL_BITMAP, pattern)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glPolygonStipple(bad PBO access)");
+ return;
+ }
+ buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+ GL_READ_ONLY_ARB,
+ ctx->Unpack.BufferObj);
+ if (!buf) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glPolygonStipple(PBO mapped)");
+ return;
+ }
+ buf = ADD_POINTERS(buf, pattern);
+ _mesa_unpack_polygon_stipple(buf, ctx->PolygonStipple, &ctx->Unpack);
+ ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+ ctx->Unpack.BufferObj);
+ }
+ else {
+ /* Get/unpack the stipple pattern from user memory */
+ _mesa_unpack_polygon_stipple(pattern, ctx->PolygonStipple, &ctx->Unpack);
}
}
-
-/*
- * NOTE: stipple pattern has already been unpacked.
+/**
+ * Called by glPolygonStipple.
*/
-void gl_PolygonStipple( GLcontext *ctx, const GLuint pattern[32] )
+void GLAPIENTRY
+_mesa_PolygonStipple( const GLubyte *pattern )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonStipple");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glPolygonStipple\n");
+ _mesa_debug(ctx, "glPolygonStipple\n");
- MEMCPY( ctx->PolygonStipple, pattern, 32 * 4 );
+ FLUSH_VERTICES(ctx, _NEW_POLYGONSTIPPLE);
- if (ctx->Polygon.StippleFlag) {
- ctx->NewState |= NEW_RASTER_OPS;
- }
-}
+ _mesa_polygon_stipple(ctx, pattern);
+ if (ctx->Driver.PolygonStipple)
+ ctx->Driver.PolygonStipple(ctx, pattern);
+}
-void gl_GetPolygonStipple( GLcontext *ctx, GLubyte *dest )
+/**
+ * Called by glPolygonStipple.
+ */
+void GLAPIENTRY
+_mesa_GetPolygonStipple( GLubyte *dest )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glGetPolygonStipple\n");
-
- gl_pack_polygon_stipple( ctx, ctx->PolygonStipple, dest );
+ _mesa_debug(ctx, "glGetPolygonStipple\n");
+
+ /* XXX someday we may put this code into a separate function and call
+ * it with ctx->Driver.GetPolygonStipple().
+ */
+ if (ctx->Pack.BufferObj->Name) {
+ /* Put/pack the stipple pattern into a PBO */
+ GLubyte *buf;
+ if (!_mesa_validate_pbo_access(2, &ctx->Pack, 32, 32, 1,
+ GL_COLOR_INDEX, GL_BITMAP, dest)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetPolygonStipple(bad PBO access)");
+ return;
+ }
+ buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ GL_WRITE_ONLY_ARB,
+ ctx->Pack.BufferObj);
+ if (!buf) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetPolygonStipple(PBO mapped)");
+ return;
+ }
+ buf = ADD_POINTERS(buf, dest);
+ _mesa_pack_polygon_stipple(ctx->PolygonStipple, buf, &ctx->Pack);
+ ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ ctx->Pack.BufferObj);
+ }
+ else {
+ /* Put/pack the stipple pattern into user memory */
+ _mesa_pack_polygon_stipple(ctx->PolygonStipple, dest, &ctx->Pack);
+ }
}
-
-void gl_PolygonOffset( GLcontext *ctx,
- GLfloat factor, GLfloat units )
+void GLAPIENTRY
+_mesa_PolygonOffset( GLfloat factor, GLfloat units )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
+ 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)
+ return;
+
+ FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.OffsetFactor = factor;
ctx->Polygon.OffsetUnits = units;
+
+ if (ctx->Driver.PolygonOffset)
+ ctx->Driver.PolygonOffset( ctx, factor, units );
+}
+
+
+void GLAPIENTRY
+_mesa_PolygonOffsetEXT( GLfloat factor, GLfloat bias )
+{
+ GET_CURRENT_CONTEXT(ctx);
+ /* XXX mult by DepthMaxF here??? */
+ _mesa_PolygonOffset(factor, bias * ctx->DrawBuffer->_DepthMaxF );
+}
+
+#endif
+
+
+/**********************************************************************/
+/** \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) );
}
+/*@}*/
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