X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Forg%2Fibex%2Ftranslators%2FFreetype.c;h=2a1c798f858f58d4c085e875eba625fa28325f96;hb=da1f843588c8bd2b2c7cc74a5b4ffff8d57ab712;hp=adef007b716a10d1804c87c008043a2b0e182015;hpb=da638c8e64a289bb525066cd356d0dd5149e26ea;p=org.ibex.core.git

diff --git a/src/org/ibex/translators/Freetype.c b/src/org/ibex/translators/Freetype.c
index adef007..2a1c798 100644
--- a/src/org/ibex/translators/Freetype.c
+++ b/src/org/ibex/translators/Freetype.c
@@ -1 +1,107 @@
 // Copyright 2003 Adam Megacz, see the COPYING file for licensing [GPL]
+
+#include <unistd.h>
+#include <freetype/freetype.h>
+
+/* NOTE: _user_info is defined in crt0.c. It points to a 4096 byte
+   block of memory that contains 1024 32-bit values that can be set
+   with the setUserInfo() method of MIPSEmu.
+
+   The VM will pause after initialization.  When unpaused, it expects
+   that:
+
+     user_info[0] = ptr to font byte stream in memory
+     user_info[1] = length of font stream
+     user_info[2] = unicode index of first glyph to render
+     user_info[3] = unicode index of last glyph to render
+     user_info[4] = point size to render in
+
+   The VM will then iterate over the requested glyphs, performing the
+   following actions for each glyph:
+   
+     - render the glyph
+     - store the address of the glyph bitmap in user_info[5]
+     - store the width of the glyph bitmap in user_info[6]
+     - store the height of the glyph bitmap in user_info[7]
+     - store the font's ascender into user_info[8]
+     - store the font's height into user_info[9]
+     - store the glyph's ascender into user_info[10]
+     - store the glyph's advance into user_info[11]
+
+   The VM will then pause after each glyph.  The VM should not be
+   unpaused after the last glyph until the next glyph set has been
+   configured in user_info (ie it does not pause twice).
+
+*/
+
+extern char *user_info[1024];
+
+#define FT_Check(expr) do { \
+    if((expr) != 0) { \
+        errprint(#expr " failed\n"); \
+        exit(EXIT_FAILURE); \
+    } \
+} while(0)
+
+#define max(a, b) ((a) > (b) ? (a) : (b))
+#define min(a, b) ((a) < (b) ? (a) : (b))
+
+static int errprint(const char *s) {
+    int l = strlen(s);
+    int n;
+    while(l) {
+        n = write(STDERR_FILENO,s,l);
+        if(n < 0) return n;
+        l -= n;
+        s += n;
+    }
+    return 0;
+}
+
+extern void _pause();
+
+int freetype_main() {
+    char *fontdata;
+    int glyph_index;
+    short charcode;
+    FT_Library  library;   /* handle to library     */
+    FT_Face     face;      /* handle to face object */
+
+    FT_Check(FT_Init_FreeType(&library));
+    FT_Check(FT_New_Memory_Face(library, user_info[0], (int)user_info[1], 0, &face));
+
+    for(;;) {
+      
+        _pause();
+        FT_Check(FT_Set_Char_Size(face, 0, ((int)user_info[4]) * 64, 72, 72));
+        for(charcode = (int)user_info[2]; charcode <= (int)user_info[3]; charcode++) {
+
+            glyph_index = FT_Get_Char_Index(face, charcode);
+            FT_Check(FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT | FT_LOAD_FORCE_AUTOHINT));
+            FT_Check(FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL));
+
+            user_info[5]  = (char*)face->glyph->bitmap.buffer;
+            user_info[6]  = (char*)face->glyph->bitmap.width;
+            user_info[7]  = (char*)face->glyph->bitmap.rows;
+            user_info[8]  = (char*)(face->size->metrics.ascender >> 6);
+            user_info[9]  = (char*)((-1 * face->size->metrics.descender) >> 6);
+            user_info[10] = (char*)(face->glyph->metrics.horiBearingY >> 6);
+            user_info[11] = (char*)(face->glyph->advance.x >> 6);
+
+        }
+    }
+}
+
+
+// Kerning code; add back in later
+/*
+if (old_glyph_index != -1) {
+  if (FT_HAS_KERNING(face)) {
+    FT_Check(FT_Get_Kerning(face, old_glyph_index, glyph_index, 0, &kerning));
+    x += kerning.x >> 6;
+  } else {
+    x += face->glyph->advance.x >> 6;
+  }
+}
+old_glyph_index = glyph_index;
+*/