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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/FTFace.cpp
parenta124216ee05a5d63ea8fcdafcd050ad1fadf0b09 (diff)
*** empty log message ***
Diffstat (limited to 'src/ftgl/FTFace.cpp')
-rw-r--r--src/ftgl/FTFace.cpp232
1 files changed, 232 insertions, 0 deletions
diff --git a/src/ftgl/FTFace.cpp b/src/ftgl/FTFace.cpp
new file mode 100644
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--- /dev/null
+++ b/src/ftgl/FTFace.cpp
@@ -0,0 +1,232 @@
+/*
+ * 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 "FTFace.h"
+#include "FTLibrary.h"
+
+#include FT_TRUETYPE_TABLES_H
+
+FTFace::FTFace(const char* fontFilePath, bool precomputeKerning)
+: numGlyphs(0),
+ fontEncodingList(0),
+ kerningCache(0),
+ err(0)
+{
+ const FT_Long DEFAULT_FACE_INDEX = 0;
+ ftFace = new FT_Face;
+
+ err = FT_New_Face(*FTLibrary::Instance().GetLibrary(), fontFilePath,
+ DEFAULT_FACE_INDEX, ftFace);
+ if(err)
+ {
+ delete ftFace;
+ ftFace = 0;
+ return;
+ }
+
+ numGlyphs = (*ftFace)->num_glyphs;
+ hasKerningTable = (FT_HAS_KERNING((*ftFace)) != 0);
+
+ if(hasKerningTable && precomputeKerning)
+ {
+ BuildKerningCache();
+ }
+}
+
+
+FTFace::FTFace(const unsigned char *pBufferBytes, size_t bufferSizeInBytes,
+ bool precomputeKerning)
+: numGlyphs(0),
+ fontEncodingList(0),
+ kerningCache(0),
+ err(0)
+{
+ const FT_Long DEFAULT_FACE_INDEX = 0;
+ ftFace = new FT_Face;
+
+ err = FT_New_Memory_Face(*FTLibrary::Instance().GetLibrary(),
+ (FT_Byte const *)pBufferBytes, (FT_Long)bufferSizeInBytes,
+ DEFAULT_FACE_INDEX, ftFace);
+ if(err)
+ {
+ delete ftFace;
+ ftFace = 0;
+ return;
+ }
+
+ numGlyphs = (*ftFace)->num_glyphs;
+ hasKerningTable = (FT_HAS_KERNING((*ftFace)) != 0);
+
+ if(hasKerningTable && precomputeKerning)
+ {
+ BuildKerningCache();
+ }
+}
+
+
+FTFace::~FTFace()
+{
+ if(kerningCache)
+ {
+ delete[] kerningCache;
+ }
+
+ if(ftFace)
+ {
+ FT_Done_Face(*ftFace);
+ delete ftFace;
+ ftFace = 0;
+ }
+}
+
+
+bool FTFace::Attach(const char* fontFilePath)
+{
+ err = FT_Attach_File(*ftFace, fontFilePath);
+ return !err;
+}
+
+
+bool FTFace::Attach(const unsigned char *pBufferBytes,
+ size_t bufferSizeInBytes)
+{
+ FT_Open_Args open;
+
+ open.flags = FT_OPEN_MEMORY;
+ open.memory_base = (FT_Byte const *)pBufferBytes;
+ open.memory_size = (FT_Long)bufferSizeInBytes;
+
+ err = FT_Attach_Stream(*ftFace, &open);
+ return !err;
+}
+
+
+const FTSize& FTFace::Size(const unsigned int size, const unsigned int res)
+{
+ charSize.CharSize(ftFace, size, res, res);
+ err = charSize.Error();
+
+ return charSize;
+}
+
+
+unsigned int FTFace::CharMapCount() const
+{
+ return (*ftFace)->num_charmaps;
+}
+
+
+FT_Encoding* FTFace::CharMapList()
+{
+ if(0 == fontEncodingList)
+ {
+ fontEncodingList = new FT_Encoding[CharMapCount()];
+ for(size_t i = 0; i < CharMapCount(); ++i)
+ {
+ fontEncodingList[i] = (*ftFace)->charmaps[i]->encoding;
+ }
+ }
+
+ return fontEncodingList;
+}
+
+
+FTPoint FTFace::KernAdvance(unsigned int index1, unsigned int index2)
+{
+ float x, y;
+
+ if(!hasKerningTable || !index1 || !index2)
+ {
+ return FTPoint(0.0f, 0.0f);
+ }
+
+ if(kerningCache && index1 < FTFace::MAX_PRECOMPUTED
+ && index2 < FTFace::MAX_PRECOMPUTED)
+ {
+ x = kerningCache[2 * (index2 * FTFace::MAX_PRECOMPUTED + index1)];
+ y = kerningCache[2 * (index2 * FTFace::MAX_PRECOMPUTED + index1) + 1];
+ return FTPoint(x, y);
+ }
+
+ FT_Vector kernAdvance;
+ kernAdvance.x = kernAdvance.y = 0;
+
+ err = FT_Get_Kerning(*ftFace, index1, index2, ft_kerning_unfitted,
+ &kernAdvance);
+ if(err)
+ {
+ return FTPoint(0.0f, 0.0f);
+ }
+
+ x = static_cast<float>(kernAdvance.x) / 64.0f;
+ y = static_cast<float>(kernAdvance.y) / 64.0f;
+
+ return FTPoint(x, y);
+}
+
+
+FT_GlyphSlot FTFace::Glyph(unsigned int index, FT_Int load_flags)
+{
+ err = FT_Load_Glyph(*ftFace, index, load_flags);
+ if(err)
+ {
+ return NULL;
+ }
+
+ return (*ftFace)->glyph;
+}
+
+
+void FTFace::BuildKerningCache()
+{
+ FT_Vector kernAdvance;
+ kernAdvance.x = 0;
+ kernAdvance.y = 0;
+ kerningCache = new float[FTFace::MAX_PRECOMPUTED
+ * FTFace::MAX_PRECOMPUTED * 2];
+ for(unsigned int j = 0; j < FTFace::MAX_PRECOMPUTED; j++)
+ {
+ for(unsigned int i = 0; i < FTFace::MAX_PRECOMPUTED; i++)
+ {
+ err = FT_Get_Kerning(*ftFace, i, j, ft_kerning_unfitted,
+ &kernAdvance);
+ if(err)
+ {
+ delete[] kerningCache;
+ kerningCache = NULL;
+ return;
+ }
+
+ kerningCache[2 * (j * FTFace::MAX_PRECOMPUTED + i)] =
+ static_cast<float>(kernAdvance.x) / 64.0f;
+ kerningCache[2 * (j * FTFace::MAX_PRECOMPUTED + i) + 1] =
+ static_cast<float>(kernAdvance.y) / 64.0f;
+ }
+ }
+}
+