X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Ftinyfps.c;fp=src%2Ftinyfps.c;h=4b9d9dbdc4700f6b67519cd1d8c5d9309aa39e66;hp=0000000000000000000000000000000000000000;hb=a8d502c1e163a95f25b2f5aec1478d2cb61027c2;hpb=9dda65bd2ac317cf110c080e561f40b2ee221c93

diff --git a/src/tinyfps.c b/src/tinyfps.c
new file mode 100644
index 0000000..4b9d9db
--- /dev/null
+++ b/src/tinyfps.c
@@ -0,0 +1,125 @@
+#include <stdlib.h>
+
+#include "tinyfps.h"
+#include "demo.h"
+
+// TinyFPS, just a minimal fraps like font to show FPS during the demo and not just after.
+// I'll be using it in my effects for my performance test purposes, just adding it here.
+// Maybe it would be nice if initFpsFonts would be called in demo.c once but I avoided touching that code.
+
+/*
+1110 0010 1110 1110 1010 1110 1110 1110 1110 1110
+1010 0010 0010 0010 1010 1000 1000 0010 1010 1010
+1010 0010 1110 0110 1110 1110 1110 0010 1110 1110
+1010 0010 1000 0010 0010 0010 1010 0010 1010 0010
+1110 0010 1110 1110 0010 1110 1110 0010 1110 1110
+*/
+
+const unsigned char miniDecimalData[] = { 0xE2, 0xEE, 0xAE, 0xEE, 0xEE,
+0xA2, 0x22, 0xA8, 0x82, 0xAA,
+0xA2, 0xE6, 0xEE, 0xE2, 0xEE,
+0xA2, 0x82, 0x22, 0xA2, 0xA2,
+0xE2, 0xEE, 0x2E, 0xE2, 0xEE };
+
+unsigned short miniDecimalFonts[FPS_FONT_NUM_PIXELS];
+
+unsigned long startingFpsTime = 0;
+int fpsFontsInit = 0;
+int nFrames = 0;
+
+void initFpsFonts()
+{
+	if (fpsFontsInit == 0)
+	{
+		unsigned char miniDecimalPixels[FPS_FONT_NUM_PIXELS];
+
+		int k = 0;
+		for (int i = 0; i < FPS_FONT_NUM_PIXELS / 8; i++)
+		{
+			unsigned char d = miniDecimalData[i];
+			for (int j = 0; j < 8; j++)
+			{
+				unsigned char c = (d & 0x80) >> 7;
+				miniDecimalPixels[k++] = c;
+				d <<= 1;
+			}
+		}
+
+		int i = 0;
+		for (int n = 0; n < FPS_FONTS_NUM; n++)
+		{
+			for (int y = 0; y < FPS_FONT_HEIGHT; y++)
+			{
+				for (int x = 0; x < FPS_FONT_WIDTH; x++)
+				{
+					miniDecimalFonts[i++] = miniDecimalPixels[n * FPS_FONT_WIDTH + x + y * FPS_FONT_WIDTH * FPS_FONTS_NUM] * 0xFFFF;
+				}
+			}
+		}
+
+		fpsFontsInit = 1;
+	}
+}
+
+void drawFont(unsigned char decimal, int posX, int posY, unsigned char zoom, unsigned short *vram)
+{
+	int x, y, j, k;
+	unsigned short c;
+
+    unsigned short *fontData = (unsigned short*)&miniDecimalFonts[decimal * FPS_FONT_WIDTH * FPS_FONT_HEIGHT];
+
+	vram += posY * fb_width + posX;
+
+	if (zoom < 1) zoom = 1;
+	if (zoom > 4) zoom = 4;
+
+    for (y = 0; y<FPS_FONT_HEIGHT; y++)
+    {
+		for (x = 0; x<FPS_FONT_WIDTH; x++)
+        {
+			c = *fontData++;
+
+            if (c!=0)
+            {
+                for (j=0; j<zoom; j++)
+                {
+                    for (k=0; k<zoom; k++)
+                    {
+                        *(vram + j * fb_width + k) ^= c;
+                    }
+                }
+            }
+            vram += zoom;
+        }
+        vram += (-FPS_FONT_WIDTH * zoom + fb_width * zoom);
+    }
+}
+
+void drawDecimal(unsigned int number, int posX, int posY, unsigned char zoom, unsigned short *vram)
+{
+	int i = 0;
+    char buffer[8];
+
+    itoa(number, buffer, 10);
+
+	while(i < 8 && buffer[i] != 0)
+    {
+        drawFont(buffer[i] - 48, posX + i * zoom * FPS_FONT_WIDTH, posY, zoom, vram);
+		i++;
+    }
+}
+
+void drawFps(unsigned short *vram)
+{
+	unsigned long dt = time_msec - startingFpsTime;
+	static int fps = 0;
+
+	nFrames++;
+	if (dt >= 1000)
+	{
+		fps = (nFrames * 1000) / dt;
+		startingFpsTime = time_msec;
+		nFrames = 0;
+	}
+	drawDecimal(fps, 4, 4, 2, vram);
+}