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1 files changed, 153 insertions, 0 deletions

diff --git a/src/ftgl/FTGlyph/FTTextureGlyph.cpp b/src/ftgl/FTGlyph/FTTextureGlyph.cpp
new file mode 100644
index 0000000..a9cf2e8
--- /dev/null
+++ b/src/ftgl/FTGlyph/FTTextureGlyph.cpp
@@ -0,0 +1,153 @@
+/*
+ * 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 <math.h>
+
+#include "FTGL/ftgl.h"
+
+#include "FTInternals.h"
+#include "FTTextureGlyphImpl.h"
+
+
+//
+//  FTGLTextureGlyph
+//
+
+
+FTTextureGlyph::FTTextureGlyph(FT_GlyphSlot glyph, int id, int xOffset,
+                               int yOffset, int width, int height) :
+    FTGlyph(new FTTextureGlyphImpl(glyph, id, xOffset, yOffset, width, height))
+{}
+
+
+FTTextureGlyph::~FTTextureGlyph()
+{}
+
+
+const FTPoint& FTTextureGlyph::Render(const FTPoint& pen, int renderMode)
+{
+    FTTextureGlyphImpl *myimpl = dynamic_cast<FTTextureGlyphImpl *>(impl);
+    return myimpl->RenderImpl(pen, renderMode);
+}
+
+
+//
+//  FTGLTextureGlyphImpl
+//
+
+
+GLint FTTextureGlyphImpl::activeTextureID = 0;
+
+FTTextureGlyphImpl::FTTextureGlyphImpl(FT_GlyphSlot glyph, int id, int xOffset,
+                                       int yOffset, int width, int height)
+:   FTGlyphImpl(glyph),
+    destWidth(0),
+    destHeight(0),
+    glTextureID(id)
+{
+    /* FIXME: need to propagate the render mode all the way down to
+     * here in order to get FT_RENDER_MODE_MONO aliased fonts.
+     */
+
+    err = FT_Render_Glyph(glyph, FT_RENDER_MODE_NORMAL);
+    if(err || glyph->format != ft_glyph_format_bitmap)
+    {
+        return;
+    }
+
+    FT_Bitmap      bitmap = glyph->bitmap;
+
+    destWidth  = bitmap.width;
+    destHeight = bitmap.rows;
+
+    if(destWidth && destHeight)
+    {
+        glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
+        glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
+        glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+        glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+        glBindTexture(GL_TEXTURE_2D, glTextureID);
+        glTexSubImage2D(GL_TEXTURE_2D, 0, xOffset, yOffset, destWidth, destHeight, GL_ALPHA, GL_UNSIGNED_BYTE, bitmap.buffer);
+
+        glPopClientAttrib();
+    }
+
+
+//      0
+//      +----+
+//      |    |
+//      |    |
+//      |    |
+//      +----+
+//           1
+
+    uv[0].X(static_cast<float>(xOffset) / static_cast<float>(width));
+    uv[0].Y(static_cast<float>(yOffset) / static_cast<float>(height));
+    uv[1].X(static_cast<float>(xOffset + destWidth) / static_cast<float>(width));
+    uv[1].Y(static_cast<float>(yOffset + destHeight) / static_cast<float>(height));
+
+    corner = FTPoint(glyph->bitmap_left, glyph->bitmap_top);
+}
+
+
+FTTextureGlyphImpl::~FTTextureGlyphImpl()
+{}
+
+
+const FTPoint& FTTextureGlyphImpl::RenderImpl(const FTPoint& pen,
+                                              int renderMode)
+{
+    float dx, dy;
+
+    if(activeTextureID != glTextureID)
+    {
+        glBindTexture(GL_TEXTURE_2D, (GLuint)glTextureID);
+        activeTextureID = glTextureID;
+    }
+
+    dx = floor(pen.Xf() + corner.Xf());
+    dy = floor(pen.Yf() + corner.Yf());
+
+    glBegin(GL_QUADS);
+        glTexCoord2f(uv[0].Xf(), uv[0].Yf());
+        glVertex2f(dx, dy);
+
+        glTexCoord2f(uv[0].Xf(), uv[1].Yf());
+        glVertex2f(dx, dy - destHeight);
+
+        glTexCoord2f(uv[1].Xf(), uv[1].Yf());
+        glVertex2f(dx + destWidth, dy - destHeight);
+
+        glTexCoord2f(uv[1].Xf(), uv[0].Yf());
+        glVertex2f(dx + destWidth, dy);
+    glEnd();
+
+    return advance;
+}
+