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authorscuri <scuri>2010-06-21 22:55:10 +0000
committerscuri <scuri>2010-06-21 22:55:10 +0000
commit37a92b86d13e89d0dcec92be6d23ceced29dbc36 (patch)
treefaff61ef668379212b4ed948934533c3f2fe308b /src/ftgl/FTGlyph/FTExtrudeGlyph.cpp
parenta124216ee05a5d63ea8fcdafcd050ad1fadf0b09 (diff)
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Diffstat (limited to 'src/ftgl/FTGlyph/FTExtrudeGlyph.cpp')
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diff --git a/src/ftgl/FTGlyph/FTExtrudeGlyph.cpp b/src/ftgl/FTGlyph/FTExtrudeGlyph.cpp
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+++ b/src/ftgl/FTGlyph/FTExtrudeGlyph.cpp
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+/*
+ * FTGL - OpenGL font library
+ *
+ * Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
+ * Copyright (c) 2008 Sam Hocevar <sam@zoy.org>
+ *
+ * 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 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.
+ */
+
+#include "config.h"
+
+#include <iostream>
+
+#include "FTGL/ftgl.h"
+
+#include "FTInternals.h"
+#include "FTExtrudeGlyphImpl.h"
+#include "FTVectoriser.h"
+
+
+//
+// FTGLExtrudeGlyph
+//
+
+
+FTExtrudeGlyph::FTExtrudeGlyph(FT_GlyphSlot glyph, float depth,
+ float frontOutset, float backOutset,
+ bool useDisplayList) :
+ FTGlyph(new FTExtrudeGlyphImpl(glyph, depth, frontOutset, backOutset,
+ useDisplayList))
+{}
+
+
+FTExtrudeGlyph::~FTExtrudeGlyph()
+{}
+
+
+const FTPoint& FTExtrudeGlyph::Render(const FTPoint& pen, int renderMode)
+{
+ FTExtrudeGlyphImpl *myimpl = dynamic_cast<FTExtrudeGlyphImpl *>(impl);
+ return myimpl->RenderImpl(pen, renderMode);
+}
+
+
+//
+// FTGLExtrudeGlyphImpl
+//
+
+
+FTExtrudeGlyphImpl::FTExtrudeGlyphImpl(FT_GlyphSlot glyph, float _depth,
+ float _frontOutset, float _backOutset,
+ bool useDisplayList)
+: FTGlyphImpl(glyph),
+ vectoriser(0),
+ glList(0)
+{
+ bBox.SetDepth(-_depth);
+
+ if(ft_glyph_format_outline != glyph->format)
+ {
+ err = 0x14; // Invalid_Outline
+ return;
+ }
+
+ vectoriser = new FTVectoriser(glyph);
+
+ if((vectoriser->ContourCount() < 1) || (vectoriser->PointCount() < 3))
+ {
+ delete vectoriser;
+ vectoriser = NULL;
+ return;
+ }
+
+ hscale = glyph->face->size->metrics.x_ppem * 64;
+ vscale = glyph->face->size->metrics.y_ppem * 64;
+ depth = _depth;
+ frontOutset = _frontOutset;
+ backOutset = _backOutset;
+
+ if(useDisplayList)
+ {
+ glList = glGenLists(3);
+
+ /* Front face */
+ glNewList(glList + 0, GL_COMPILE);
+ RenderFront();
+ glEndList();
+
+ /* Back face */
+ glNewList(glList + 1, GL_COMPILE);
+ RenderBack();
+ glEndList();
+
+ /* Side face */
+ glNewList(glList + 2, GL_COMPILE);
+ RenderSide();
+ glEndList();
+
+ delete vectoriser;
+ vectoriser = NULL;
+ }
+}
+
+
+FTExtrudeGlyphImpl::~FTExtrudeGlyphImpl()
+{
+ if(glList)
+ {
+ glDeleteLists(glList, 3);
+ }
+ else if(vectoriser)
+ {
+ delete vectoriser;
+ }
+}
+
+
+const FTPoint& FTExtrudeGlyphImpl::RenderImpl(const FTPoint& pen,
+ int renderMode)
+{
+ glTranslatef(pen.Xf(), pen.Yf(), pen.Zf());
+ if(glList)
+ {
+ if(renderMode & FTGL::RENDER_FRONT)
+ glCallList(glList + 0);
+ if(renderMode & FTGL::RENDER_BACK)
+ glCallList(glList + 1);
+ if(renderMode & FTGL::RENDER_SIDE)
+ glCallList(glList + 2);
+ }
+ else if(vectoriser)
+ {
+ if(renderMode & FTGL::RENDER_FRONT)
+ RenderFront();
+ if(renderMode & FTGL::RENDER_BACK)
+ RenderBack();
+ if(renderMode & FTGL::RENDER_SIDE)
+ RenderSide();
+ }
+ glTranslatef(-pen.Xf(), -pen.Yf(), -pen.Zf());
+
+ return advance;
+}
+
+
+void FTExtrudeGlyphImpl::RenderFront()
+{
+ vectoriser->MakeMesh(1.0, 1, frontOutset);
+ glNormal3d(0.0, 0.0, 1.0);
+
+ const FTMesh *mesh = vectoriser->GetMesh();
+ for(unsigned int j = 0; j < mesh->TesselationCount(); ++j)
+ {
+ const FTTesselation* subMesh = mesh->Tesselation(j);
+ unsigned int polygonType = subMesh->PolygonType();
+
+ glBegin(polygonType);
+ for(unsigned int i = 0; i < subMesh->PointCount(); ++i)
+ {
+ FTPoint pt = subMesh->Point(i);
+
+ glTexCoord2f(pt.Xf() / hscale,
+ pt.Yf() / vscale);
+
+ glVertex3f(pt.Xf() / 64.0f,
+ pt.Yf() / 64.0f,
+ 0.0f);
+ }
+ glEnd();
+ }
+}
+
+
+void FTExtrudeGlyphImpl::RenderBack()
+{
+ vectoriser->MakeMesh(-1.0, 2, backOutset);
+ glNormal3d(0.0, 0.0, -1.0);
+
+ const FTMesh *mesh = vectoriser->GetMesh();
+ for(unsigned int j = 0; j < mesh->TesselationCount(); ++j)
+ {
+ const FTTesselation* subMesh = mesh->Tesselation(j);
+ unsigned int polygonType = subMesh->PolygonType();
+
+ glBegin(polygonType);
+ for(unsigned int i = 0; i < subMesh->PointCount(); ++i)
+ {
+ FTPoint pt = subMesh->Point(i);
+
+ glTexCoord2f(subMesh->Point(i).Xf() / hscale,
+ subMesh->Point(i).Yf() / vscale);
+
+ glVertex3f(subMesh->Point(i).Xf() / 64.0f,
+ subMesh->Point(i).Yf() / 64.0f,
+ -depth);
+ }
+ glEnd();
+ }
+}
+
+
+void FTExtrudeGlyphImpl::RenderSide()
+{
+ int contourFlag = vectoriser->ContourFlag();
+
+ for(size_t c = 0; c < vectoriser->ContourCount(); ++c)
+ {
+ const FTContour* contour = vectoriser->Contour(c);
+ size_t n = contour->PointCount();
+
+ if(n < 2)
+ {
+ continue;
+ }
+
+ glBegin(GL_QUAD_STRIP);
+ for(size_t j = 0; j <= n; ++j)
+ {
+ size_t cur = (j == n) ? 0 : j;
+ size_t next = (cur == n - 1) ? 0 : cur + 1;
+
+ FTPoint frontPt = contour->FrontPoint(cur);
+ FTPoint nextPt = contour->FrontPoint(next);
+ FTPoint backPt = contour->BackPoint(cur);
+
+ FTPoint normal = FTPoint(0.f, 0.f, 1.f) ^ (frontPt - nextPt);
+ if(normal != FTPoint(0.0f, 0.0f, 0.0f))
+ {
+ glNormal3dv(static_cast<const FTGL_DOUBLE*>(normal.Normalise()));
+ }
+
+ glTexCoord2f(frontPt.Xf() / hscale, frontPt.Yf() / vscale);
+
+ if(contourFlag & ft_outline_reverse_fill)
+ {
+ glVertex3f(backPt.Xf() / 64.0f, backPt.Yf() / 64.0f, 0.0f);
+ glVertex3f(frontPt.Xf() / 64.0f, frontPt.Yf() / 64.0f, -depth);
+ }
+ else
+ {
+ glVertex3f(backPt.Xf() / 64.0f, backPt.Yf() / 64.0f, -depth);
+ glVertex3f(frontPt.Xf() / 64.0f, frontPt.Yf() / 64.0f, 0.0f);
+ }
+ }
+ glEnd();
+ }
+}
+