From a0c4815433ccd57322f4f7703ca35e9ccfa59250 Mon Sep 17 00:00:00 2001 From: marha Date: Thu, 8 Oct 2009 13:15:52 +0000 Subject: Added MesaLib-7.6 --- mesalib/src/mesa/main/polygon.c | 322 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 322 insertions(+) create mode 100644 mesalib/src/mesa/main/polygon.c (limited to 'mesalib/src/mesa/main/polygon.c') diff --git a/mesalib/src/mesa/main/polygon.c b/mesalib/src/mesa/main/polygon.c new file mode 100644 index 000000000..376a87a39 --- /dev/null +++ b/mesalib/src/mesa/main/polygon.c @@ -0,0 +1,322 @@ +/** + * \file polygon.c + * Polygon operations. + */ + +/* + * Mesa 3-D graphics library + * 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 + * 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. + */ + + +#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 "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(ctx); + + if (MESA_VERBOSE&VERBOSE_API) + _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" ); + return; + } + + if (ctx->Polygon.CullFaceMode == mode) + return; + + FLUSH_VERTICES(ctx, _NEW_POLYGON); + ctx->Polygon.CullFaceMode = mode; + + if (ctx->Driver.CullFace) + ctx->Driver.CullFace( ctx, 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 ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (MESA_VERBOSE&VERBOSE_API) + _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" ); + return; + } + + if (ctx->Polygon.FrontFace == mode) + return; + + FLUSH_VERTICES(ctx, _NEW_POLYGON); + ctx->Polygon.FrontFace = mode; + + ctx->Polygon._FrontBit = (GLboolean) (mode == GL_CW); + + if (ctx->Driver.FrontFace) + ctx->Driver.FrontFace( ctx, 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 ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (MESA_VERBOSE&VERBOSE_API) + _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)" ); + return; + } + + switch (face) { + case GL_FRONT: + 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; + 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; + } + + if (ctx->Polygon.FrontMode == GL_FILL && ctx->Polygon.BackMode == GL_FILL) + ctx->_TriangleCaps &= ~DD_TRI_UNFILLED; + else + ctx->_TriangleCaps |= DD_TRI_UNFILLED; + + if (ctx->Driver.PolygonMode) + ctx->Driver.PolygonMode(ctx, face, mode); +} + +#if _HAVE_FULL_GL + + +/** + * 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) +{ + pattern = _mesa_map_validate_pbo_source(ctx, 2, + &ctx->Unpack, 32, 32, 1, + GL_COLOR_INDEX, GL_BITMAP, pattern, + "glPolygonStipple"); + if (!pattern) + return; + + _mesa_unpack_polygon_stipple(pattern, ctx->PolygonStipple, &ctx->Unpack); + + _mesa_unmap_pbo_source(ctx, &ctx->Unpack); +} + + +/** + * Called by glPolygonStipple. + */ +void GLAPIENTRY +_mesa_PolygonStipple( const GLubyte *pattern ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (MESA_VERBOSE&VERBOSE_API) + _mesa_debug(ctx, "glPolygonStipple\n"); + + FLUSH_VERTICES(ctx, _NEW_POLYGONSTIPPLE); + + _mesa_polygon_stipple(ctx, pattern); + + if (ctx->Driver.PolygonStipple) + ctx->Driver.PolygonStipple(ctx, pattern); +} + + +/** + * Called by glPolygonStipple. + */ +void GLAPIENTRY +_mesa_GetPolygonStipple( GLubyte *dest ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (MESA_VERBOSE&VERBOSE_API) + _mesa_debug(ctx, "glGetPolygonStipple\n"); + + dest = _mesa_map_validate_pbo_dest(ctx, 2, + &ctx->Pack, 32, 32, 1, + GL_COLOR_INDEX, GL_BITMAP, dest, + "glGetPolygonStipple"); + if (!dest) + return; + + _mesa_pack_polygon_stipple(ctx->PolygonStipple, dest, &ctx->Pack); + + _mesa_unmap_pbo_dest(ctx, &ctx->Pack); +} + + +void GLAPIENTRY +_mesa_PolygonOffset( GLfloat factor, GLfloat units ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (MESA_VERBOSE&VERBOSE_API) + _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) ); +} + +/*@}*/ -- cgit v1.2.3