4 files changed, 55 insertions, 2 deletions
diff --git a/source/gfx.c b/source/gfx.c
index 0cf0ac8..a17f80c 100644
--- a/source/gfx.c
+++ b/source/gfx.c
@@ -9,6 +9,7 @@
 #include "gfx.h"
 #include "apu.h"
 #include "cheats.h"
+#include "config.h"
 
 #include <retro_inline.h>
 
@@ -344,6 +345,7 @@ void S9xStartScreenRefresh(void)
             GFX.ZPitch = GFX.RealPitch;
             GFX.ZPitch >>= 1;
          }
+      IPPU.RenderedFramesCount++;
       }
 
       PPU.RecomputeClipWindows = true;
@@ -351,8 +353,11 @@ void S9xStartScreenRefresh(void)
       GFX.Delta = (GFX.SubScreen - GFX.Screen) >> 1;
    }
 
-   if (++IPPU.FrameCount % Memory.ROMFramesPerSecond == 0)
-      IPPU.FrameCount = 0;
+   if (++IPPU.FrameCount % Memory.ROMFramesPerSecond == 0) {
+       IPPU.DisplayedRenderedFrameCount = IPPU.RenderedFramesCount;
+       IPPU.RenderedFramesCount = 0;
+       IPPU.FrameCount = 0;
+   }
 }
 
 void RenderLine(uint8_t C)
@@ -415,6 +420,8 @@ void S9xEndScreenRefresh(void)
 
       GFX.Pitch = GFX.Pitch2 = GFX.RealPitch;
       GFX.PPL = GFX.PPLx2 >> 1;
+
+      if (option.showfps == 1)	S9xDisplayFrameRate();
    }
 #ifdef LAGFIX
    finishedFrame = true;
@@ -3207,3 +3214,44 @@ void S9xUpdateScreen(void)
 #endif
    IPPU.PreviousLine = IPPU.CurrentLine;
 }
+
+#include "font.h"
+
+void DisplayChar(uint8_t* Screen, uint8_t c)
+{
+   int line = (((c & 0x7f) - 32) >> 4) * font_height;
+   int offset = (((c & 0x7f) - 32) & 15) * font_width;
+   int h, w;
+   uint16_t* s = (uint16_t*) Screen;
+   for (h = 0; h < font_height; h++, line++,
+         s += IPPU.RenderedScreenWidth - font_width)
+   {
+      for (w = 0; w < font_width; w++, s++)
+      {
+         uint8_t p = font [line][offset + w];
+
+         if (p == '#')
+            *s = 0xffff;
+         else if (p == '.')
+            *s = BLACK;
+      }
+   }
+}
+
+void S9xDisplayFrameRate()
+{
+	char string[16];
+   uint8_t *Screen = GFX.Screen;
+#ifdef TRIMUI
+	if (option.fullscreen == 4) {			// for Overscan
+		Screen += IPPU.RenderedScreenWidth * 16 +16;
+		if (IPPU.RenderedScreenHeight == SNES_HEIGHT_EXTENDED) Screen += IPPU.RenderedScreenWidth * 16;
+	}
+#endif
+	sprintf(string, "%02d/%02d", IPPU.DisplayedRenderedFrameCount, (int)Memory.ROMFramesPerSecond);
+
+	for (int i = 0; i < 5; i++) {
+		DisplayChar(Screen, string[i]);
+		Screen += (font_width - 1) * sizeof(uint16_t);
+	}
+}
diff --git a/source/gfx.h b/source/gfx.h
index fc4806b..f6fc3ee 100644
--- a/source/gfx.h
+++ b/source/gfx.h
@@ -16,6 +16,7 @@ void S9xSetupOBJ(void);
 void S9xUpdateScreen(void);
 void RenderLine(uint8_t line);
 void S9xBuildDirectColourMaps(void);
+void S9xDisplayFrameRate(void);
 
 bool S9xInitGFX(void);
 void S9xDeinitGFX(void);
diff --git a/source/ppu.c b/source/ppu.c
index 1f5df0b..5db22be 100644
--- a/source/ppu.c
+++ b/source/ppu.c
@@ -1758,6 +1758,8 @@ static void CommonPPUReset()
    IPPU.RenderThisFrame = true;
    IPPU.DirectColourMapsNeedRebuild = true;
    IPPU.FrameCount = 0;
+   IPPU.RenderedFramesCount = 0;
+   IPPU.DisplayedRenderedFrameCount = 0;
    memset(IPPU.TileCached [TILE_2BIT], 0, MAX_2BIT_TILES);
    memset(IPPU.TileCached [TILE_4BIT], 0, MAX_4BIT_TILES);
    memset(IPPU.TileCached [TILE_8BIT], 0, MAX_8BIT_TILES);
diff --git a/source/ppu.h b/source/ppu.h
index 447f7f1..934df06 100644
--- a/source/ppu.h
+++ b/source/ppu.h
@@ -40,6 +40,8 @@ typedef struct
    bool     RenderThisFrame;
    bool     DirectColourMapsNeedRebuild;
    uint32_t FrameCount;
+   uint32_t RenderedFramesCount;
+   uint32_t DisplayedRenderedFrameCount;
    uint8_t* TileCache  [3];
    uint8_t* TileCached [3];
    bool     FirstVRAMRead;