Added tft method to draw a bmp from filesystem. Added another font to emulator.

common/tft/tft.c

@@ -3,6 +3,7 @@
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
+#include "filesystem.h"
 
 bool tft_init() {
 	return ll_tft_init();
@@ -67,3 +68,59 @@ void tft_print_formatted(uint16_t x, uint16_t y, uint16_t color, uint16_t bgcolo
 	tft_print_line(x,y,color,bgcolor,font,buffer);
 	va_end(args);
 }
+
+bool tft_draw_bitmap_file_unscaled(uint16_t x, uint16_t y, const char* filename) {
+	//Copied and modified from: http://stackoverflow.com/a/17040962/2606757
+
+	FILE_HANDLE* file = filesystem_file_open(filename);
+	if(file==NULL) {
+		return false;
+	}
+
+	unsigned char info[54];
+	if(filesystem_file_read(file,info,54)!=F_OK) {
+		filesystem_file_close(file);
+		return false;
+	}
+
+	// extract image height and width from header
+	uint32_t width = *(uint32_t*)&info[18]; //width in pixel
+	uint32_t height = *(uint32_t*)&info[22]; //height in pixel
+	uint16_t depth = *(uint16_t*)&info[28]; //bit's per pixel (color depth)
+	depth/=8; //we want the number of bytes per pixel
+
+	filesystem_file_seek(file,*(uint32_t*)&info[10]); //seek to the place where img data begins
+
+	uint32_t row_padded = (width*depth + 3) & (~3); //row size aligned to 4 bytes
+
+	unsigned char data [row_padded];
+
+	for(int i = 0; i < height; i++)
+	{
+		filesystem_file_read(file,data,row_padded);
+		for(int j = 0; j < width*depth; j += depth)
+		{
+			unsigned char a,r,g,b;
+			if(depth==4) {
+				a = data[j];
+				r = data[j+1];
+				g = data[j+2];
+				b = data[j+3];
+			} else if (depth==3) {
+				a = 255;
+				r = data[j+2];
+				g = data[j+1];
+				b = data[j];
+			}
+
+			if(a!=0) {
+				tft_draw_pixel(x+j/depth,y+height-1-i,RGB(r,g,b));
+			}
+		}
+	}
+
+	filesystem_file_close(file);
+
+	return true;
+
+}