From 5b2d2b6bb0ef6d122a7cc54de4a33c49fb4945f2 Mon Sep 17 00:00:00 2001
From: Derek Foreman <manmower@gmail.com>
Date: Thu, 29 May 2003 22:45:35 +0000
Subject: [PATCH] aa fonts.  yay.

---
 glft/font.c   |  2 +-
 glft/font.h   |  4 +++-
 glft/render.c | 51 ++++++++++++++++++++++++++-------------------------
 glft/render.h |  4 +++-
 4 files changed, 33 insertions(+), 28 deletions(-)

diff --git a/glft/font.c b/glft/font.c
index b9779d8a..61ff0800 100644
--- a/glft/font.c
+++ b/glft/font.c
@@ -289,7 +289,7 @@ struct GlftGlyph *GlftFontGlyph(struct GlftFont *font, const char *c)
         g->w = w;
         glGenTextures(1, &g->tnum);
 
-        GlftRenderGlyph(font->face, g->tnum);
+        GlftRenderGlyph(font->face, g);
 
         if (!(font->spacing == FC_PROPORTIONAL)) {
             g->width = font->max_advance_width;
diff --git a/glft/font.h b/glft/font.h
index 0059913f..2494358e 100644
--- a/glft/font.h
+++ b/glft/font.h
@@ -47,7 +47,7 @@ struct GlftFont {
 struct GlftGlyph {
     /* The character in UCS-4 encoding */
     FcChar32 w;
-    /* OpenGL display list for the character */
+    /* OpenGL texture for the character */
     unsigned int tnum;
     /* The FT_Face glyph */
     FT_UInt glyph;
@@ -56,6 +56,8 @@ struct GlftGlyph {
     int y;
     int width;
     int height;
+
+    int padx, pady;
 };
 
 /*! Takes a character in UTF-8 encoding and returns an OpenGL display list
diff --git a/glft/render.c b/glft/render.c
index d4252442..e0157761 100644
--- a/glft/render.c
+++ b/glft/render.c
@@ -8,35 +8,36 @@
 
 #define TOFLOAT(x) (((x) >> 6) + ((x) & 63)/64.0)
 
-void GlftRenderGlyph(FT_Face face, unsigned int tnum)
+void GlftRenderGlyph(FT_Face face, struct GlftGlyph *g)
 {
     unsigned char *padbuf;
-    int padx = 1, pady = 1, i;
-    int err;
+    int err, i;
     FT_GlyphSlot slot = face->glyph;
 
-    err = FT_Render_Glyph( slot, ft_render_mode_normal );
+    err = FT_Render_Glyph(slot, ft_render_mode_normal);
         g_assert(!err);
-    printf("bitmap with dims %d, %d\n", slot->bitmap.rows, 
-           slot->bitmap.width);
-    while (padx < slot->bitmap.width)
-       padx <<= 1;
-    while (pady < slot->bitmap.rows)
-       pady <<= 1;
-    printf("padding to %d, %d\n", padx, pady);
-    padbuf = g_new(unsigned char, padx * pady);
+
+    g->padx = 1;
+    while (g->padx < slot->bitmap.width)
+       g->padx <<= 1;
+
+    g->pady = 1;
+    while (g->pady < slot->bitmap.rows)
+       g->pady <<= 1;
+
+    padbuf = g_new0(unsigned char, g->padx * g->pady);
     for (i = 0; i < slot->bitmap.rows; i++)
-        memcpy(padbuf + i*padx,
+        memcpy(padbuf + i*g->padx,
                slot->bitmap.buffer + i*slot->bitmap.width,
                slot->bitmap.width);
-    glBindTexture(GL_TEXTURE_2D, tnum);
+    glBindTexture(GL_TEXTURE_2D, g->tnum);
     glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_BLEND);
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, padx, pady,
+    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, g->padx, g->pady,
                  0, GL_GREEN, GL_UNSIGNED_BYTE, padbuf);
 
     g_free(padbuf);
@@ -62,19 +63,19 @@ void GlftRenderString(struct GlftFont *font, const char *str, int bytes,
             glTranslatef(GlftFontAdvance(font, p, g), 0.0, 0.0);
             glBindTexture(GL_TEXTURE_2D, g->tnum);
             glBegin(GL_QUADS);
-            glColor3f(1.0, 1.0, 1.0);
+            glColor3f(0.0, 0.0, 0.0);
 
-            glTexCoord2i(0, 1);
-            glVertex2i(g->x, g->y);
+            glTexCoord2f(0, g->height/(float)g->pady);
+            glVertex2i(0, 0);
 
-            glTexCoord2i(1, 1);
-            glVertex2i(g->x + g->width, g->y);
+            glTexCoord2f(g->width/(float)g->padx, g->height/(float)g->pady);
+            glVertex2i(0 + g->width, 0);
 
-            glTexCoord2i(1, 0);
-            glVertex2i(g->x + g->width ,g->y + g->height);
+            glTexCoord2f(g->width/(float)g->padx, 0);
+            glVertex2i(0 + g->width, 0 + g->height);
 
-            glTexCoord2i(0, 0);
-            glVertex2i(g->x, g->y + g->height);
+            glTexCoord2f(0, 0);
+            glVertex2i(0, 0 + g->height);
             glEnd();
         } else
             glTranslatef(font->max_advance_width, 0.0, 0.0);
diff --git a/glft/render.h b/glft/render.h
index 191a53b9..facdb41b 100644
--- a/glft/render.h
+++ b/glft/render.h
@@ -4,6 +4,8 @@
 #include <ft2build.h>
 #include FT_FREETYPE_H
 
-void GlftRenderGlyph(FT_Face face, unsigned int tnum);
+#include "font.h"
+
+void GlftRenderGlyph(FT_Face face, struct GlftGlyph *g);
 
 #endif
-- 
2.34.1