From 54a3d41d61893e945ea62a5006903f4cf4c1adca Mon Sep 17 00:00:00 2001
From: Brandon Wright <bearoso@gmail.com>
Date: Thu, 15 Nov 2018 17:03:24 -0600
Subject: [PATCH] GTK+: Implement a different overlay font.

It's the same font, but with kerning added and the black outline
replaced with a translucent background.
---
 gtk/src/gtk_control.cpp |   5 +-
 gtk/src/gtk_display.cpp | 119 ++++++++++++++++++++++++++++++++++++++++
 port.h                  |   5 ++
 3 files changed, 128 insertions(+), 1 deletion(-)

diff --git a/gtk/src/gtk_control.cpp b/gtk/src/gtk_control.cpp
index f79be2ad..95d11156 100644
--- a/gtk/src/gtk_control.cpp
+++ b/gtk/src/gtk_control.cpp
@@ -186,7 +186,10 @@ static void change_slot (int difference)
     gui_config->current_save_slot %= 1000;
     if (gui_config->current_save_slot < 0)
         gui_config->current_save_slot += 1000;
-    snprintf (buf, 256, "Slot %d", gui_config->current_save_slot);
+    if (!gui_config->rom_loaded)
+        return;
+
+    snprintf (buf, 256, "State Slot: %d", gui_config->current_save_slot);
     S9xSetInfoString (buf);
     GFX.InfoStringTimeout = 60;
 }
diff --git a/gtk/src/gtk_display.cpp b/gtk/src/gtk_display.cpp
index d988bcc6..2882bcd5 100644
--- a/gtk/src/gtk_display.cpp
+++ b/gtk/src/gtk_display.cpp
@@ -5,6 +5,7 @@
 #include "gtk_display.h"
 #include "gtk_display_driver.h"
 #include "gtk_display_driver_gtk.h"
+#include "font.h"
 
 #if defined(USE_XV) && defined(GDK_WINDOWING_X11)
 #include "gtk_display_driver_xv.h"
@@ -14,6 +15,27 @@
 #include "gtk_display_driver_opengl.h"
 #endif
 
+static const char kern[224][2] =
+{
+    { 2, 2 },{ 2, 3 },{ 1, 2 },{ 0, 1 },{ 0, 1 },{ 0, 2 },{ 0, 2 },{ 0, 3 },{ 1, 3 },{ 1, 3 },{ 0, 3 },{ 0, 1 },{ 0, 3 },{ 0, 2 },{ 1, 3 },{ 0, 2 },
+    { 0, 3 },{ 0, 3 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 1, 3 },{ 0, 3 },{ 0, 3 },{ 0, 2 },{ 0, 3 },{ 0, 3 },
+    { 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 3 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 1 },{ 0, 1 },{ 0, 2 },
+    { 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 3 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 2 },{ 0, 3 },{ 0, 2 },{ 0, 3 },{ 0, 2 },{ 0, 3 },{ 0, 3 },{ 0, 2 },
+    { 0, 3 },{ 0, 2 },{ 0, 2 },{ 0, 3 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 3 },{ 0, 3 },{ 0, 2 },{ 0, 3 },{ 0, 1 },{ 0, 2 },{ 0, 2 },
+    { 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 3 },{ 0, 1 },{ 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 3 },{ 1, 4 },{ 0, 3 },{ 0, 2 },{ 2, 2 },
+    { 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },
+    { 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },
+    { 2, 2 },{ 0, 3 },{ 2, 2 },{ 2, 2 },{ 2, 1 },{ 1, 3 },{ 0, 1 },{ 0, 3 },{ 0, 3 },{ 0, 3 },{ 0, 3 },{ 0, 3 },{ 0, 2 },{ 0, 2 },{ 1, 3 },{ 0, 1 },
+    { 0, 2 },{ 0, 2 },{ 0, 2 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 2 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 1 },
+    { 0, 1 },{ 0, 2 },{ 0, 1 },{ 0, 1 },{ 1, 2 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 1, 2 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 1 },
+    { 1, 2 },{ 0, 2 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 1, 1 },{ 0, 1 },{ 1, 1 },{ 0, 1 },{ 0, 2 },{ 0, 1 },{ 0, 1 },{ 0, 1 },{ 0, 2 },{ 0, 3 },
+    { 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },
+    { 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 },{ 2, 2 }
+};
+
+static const int font_width = 8;
+static const int font_height = 9;
+
 static S9xDisplayDriver  *driver;
 static snes_ntsc_t       snes_ntsc;
 static thread_job_t      job[8];
@@ -1768,4 +1790,101 @@ S9xGraphicsMode ()
 {
 }
 
+static inline int CharWidth (uint8 c)
+{
+    return font_width - kern[c - 32][0] - kern[c - 32][1];
+}
+
+static int StringWidth (const char *str)
+{
+    int length = strlen (str);
+    int pixcount = 0;
+
+    if (length > 0)
+        pixcount++;
+
+    for (int i = 0; i < length; i++)
+    {
+        pixcount += (CharWidth (str[i]) - 1);
+    }
+
+    return pixcount;
+}
+
+static void GTKDisplayChar (int x, int y, uint8 c, bool overlap = false)
+{
+    int cindex = c - 32;
+    int crow   = cindex >> 4;
+    int ccol   = cindex & 15;
+    int cwidth = font_width - kern[cindex][0] - kern[cindex][1];
+
+    int	line   = crow * font_height;
+    int	offset = ccol * font_width + kern[cindex][0];
+    int scale = IPPU.RenderedScreenWidth / SNES_WIDTH;
+
+    uint16 *s = GFX.Screen + y * GFX.RealPPL + x * scale;
+
+    for (int h = 0; h < font_height; h++, line++, s += GFX.RealPPL - cwidth * scale)
+    {
+        for (int w = 0; w < cwidth; w++, s++)
+        {
+            char p = font[line][offset + w];
+
+            if (p == '#')
+                *s = Settings.DisplayColor;
+            else if (!overlap || w > 0)
+                *s = (*s & 0xf7de) >> 1;
+
+            if (scale > 1)
+            {
+                s[1] = s[0];
+                s++;
+            }
+        }
+    }
+}
+
+void GTKDisplayStringFromBottom (const char *string, int linesFromBottom,
+                                 int pixelsFromLeft, bool allowWrap)
+{
+    if (linesFromBottom <= 0)
+        linesFromBottom = 1;
+
+    if (linesFromBottom >= 5)
+        linesFromBottom -= 3;
+
+    if (pixelsFromLeft > 128)
+        pixelsFromLeft = SNES_WIDTH - StringWidth (string);
+
+    int dst_x = pixelsFromLeft;
+    int dst_y = IPPU.RenderedScreenHeight - font_height * linesFromBottom;
+    int	len = strlen(string);
+    bool overlap = false;
+
+    for (int i = 0 ; i < len ; i++)
+    {
+        int cindex = string[i] - 32;
+        int char_width = font_width - kern[cindex][0] - kern[cindex][1];
+
+        if (dst_x + char_width > SNES_WIDTH || (uint8) string[i] < 32)
+        {
+            if (!allowWrap)
+                break;
+
+            linesFromBottom--;
+            dst_y = IPPU.RenderedScreenHeight - font_height * linesFromBottom;
+            dst_x = pixelsFromLeft;
+
+            if (dst_y >= IPPU.RenderedScreenHeight)
+                break;
+        }
+
+        if ((uint8) string[i] < 32)
+            continue;
+
+        GTKDisplayChar(dst_x, dst_y, string[i], overlap);
+        dst_x  += char_width - 1;
+        overlap = true;
+    }
+}
 
diff --git a/port.h b/port.h
index 8c97ad06..053a88ab 100644
--- a/port.h
+++ b/port.h
@@ -319,7 +319,12 @@ typedef size_t					pint;
 #ifndef __WIN32__
 void _splitpath (const char *, char *, char *, char *, char *);
 void _makepath (char *, const char *, const char *, const char *, const char *);
+#ifdef SNES9X_GTK
+void GTKDisplayStringFromBottom(const char *, int, int, bool);
+#define S9xDisplayString GTKDisplayStringFromBottom
+#else
 #define S9xDisplayString	DisplayStringFromBottom
+#endif
 #else   // __WIN32__
 #define snprintf _snprintf
 #define strcasecmp	stricmp