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1 files changed, 232 insertions, 0 deletions

diff --git a/src/ftgl/FTFace.cpp b/src/ftgl/FTFace.cpp
new file mode 100644
index 0000000..542c521
--- /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;
+        }
+    }
+}
+