Moved the font stuff into its own file.

[ccbs] / bigscreen / fonts.cpp

diff --git a/bigscreen/fonts.cpp b/bigscreen/fonts.cpp
new file mode 100644 (file)
index 0000000..b7a4cbd
--- /dev/null
+++ b/bigscreen/fonts.cpp
@@ -0,0 +1,89 @@
+#include <vector>
+#include <stdexcept>
+#include "fonts.h"
+
+std::vector<FT_Face> fonts;
+
+void init_freetype()
+{
+       FT_Library library;
+       FT_Face face;
+       if (FT_Init_FreeType(&library))
+               throw std::runtime_error("FreeType init failed.");
+
+       // Georgia
+       if (FT_New_Face(library, "/usr/share/fonts/truetype/msttcorefonts/Georgia.ttf", 0, &face))
+               throw std::runtime_error("Face opening failed.");
+       if (FT_Set_Char_Size(face, 0, 12 * 64, 96, 96))
+               throw std::runtime_error("Size set failed.");
+       fonts.push_back(face);
+
+       // FreeSerif
+       if (FT_New_Face(library, "/usr/share/fonts/truetype/freefont/FreeSerif.ttf", 0, &face)) {
+               std::fprintf(stderr, "Warning: Couldn't open FreeSerif, some glyphs might not be available\n");
+       } else {
+               if (FT_Set_Char_Size(face, 0, 12 * 64, 96, 96))
+                       throw std::runtime_error("Size set failed.");
+               fonts.push_back(face);
+       }
+       
+       // Arial Unicode MS
+       if (FT_New_Face(library, "arialuni.ttf", 0, &face)) {
+               std::fprintf(stderr, "Warning: Couldn't open Arial Unicode MS, some glyphs might not be available\n");
+       } else {
+               if (FT_Set_Char_Size(face, 0, 12 * 64, 96, 96))
+                       throw std::runtime_error("Size set failed.");
+               fonts.push_back(face);
+       }
+}
+
+int my_draw_text(const widestring &str, unsigned char *buf, int xpos, int ypos, bool real_render, int r, int g, int b)
+{
+       FT_GlyphSlot slot;
+       int x = 0;
+
+       for (widestring::const_iterator i = str.begin(); i != str.end(); ++i) {
+               int glyph_index;
+               for (std::vector<FT_Face>::const_iterator j = fonts.begin(); j != fonts.end(); ++j) {
+                       glyph_index = FT_Get_Char_Index(*j, *i);
+                       if (glyph_index == 0)
+                               continue;
+
+                       if (FT_Load_Glyph(*j, glyph_index, FT_LOAD_RENDER))
+                               throw std::runtime_error("Couldn't load glyph");
+                       slot = (*j)->glyph;
+                       break;
+               }
+               if (glyph_index == 0) {
+                       std::fprintf(stderr, "Warning: Could not find a glyph in any font for U+%x, ignoring\n", *i);
+                       continue;
+               }
+
+               if (real_render) {
+                       int y;
+                       FT_Bitmap *bm = &(slot->bitmap);
+                       for (y = 0; y < bm->rows; y++) {
+                               int xx;
+                               int dsty = ypos - slot->bitmap_top + y;
+                               if (dsty < 0 || dsty > 599) continue;
+
+                               unsigned char *dst = buf + dsty * 800*4 + (x + xpos + slot->bitmap_left)*4;
+                               unsigned char *src = bm->buffer + y * bm->width;
+                               for (xx = 0; xx < bm->width; xx++) {
+                                       *dst = (*dst * (256-*src) + r * *src) >> 8;
+                                       *dst++;
+                                       *dst = (*dst * (256-*src) + g * *src) >> 8;
+                                       *dst++;
+                                       *dst = (*dst * (256-*src) + b * *src) >> 8;
+                                       *dst++;
+                                       *dst++ = 0;
+                                       src++;
+                               }
+                       }
+               }
+
+               x += slot->advance.x >> 6;
+       }
+
+       return x;
+}