Diff: bitmap.h

Revision:

0:2f1caf4ce924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bitmap.h	Fri Jun 26 02:26:08 2015 +0000
@@ -0,0 +1,106 @@
+/** @file bitmap.h */
+#include "mbed.h"
+
+/** A class to communicate a bitmap
+ *
+ */
+class bitmap {
+public:
+
+    /** convert RGB888 to bitmap
+     *
+     * @param file_name save file name
+     * @param buf data buffer address
+     * @param pic_width picture width
+     * @param pic_height picture height
+     * @return save data size
+     */
+    int Rgb888ToBmp(char * file_name, uint8_t * buf, unsigned long pic_width, unsigned long pic_height) {
+        unsigned long offset_size = 54;
+        unsigned long buf_stride = (((pic_width * 4u) + 31u) & ~31u);
+        unsigned long pic_size = buf_stride * pic_height;
+        unsigned long file_size = 0;
+        int save_file_size = 0;
+        int write_index = (buf_stride * pic_height) - buf_stride;
+        unsigned long cnt;
+        uint8_t wk_bitmap_buf[16];
+        FILE * fp = fopen(file_name, "w");
+
+        if (fp != NULL) {
+            file_size = pic_size + offset_size;
+
+            /* BITMAPFILEHEADER */
+            wk_bitmap_buf[0]  = 'B';
+            wk_bitmap_buf[1]  = 'M';
+            wk_bitmap_buf[2]  = (unsigned char)(file_size >> 0);   /* bfSize */
+            wk_bitmap_buf[3]  = (unsigned char)(file_size >> 8);   /* bfSize */
+            wk_bitmap_buf[4]  = (unsigned char)(file_size >> 16);  /* bfSize */
+            wk_bitmap_buf[5]  = (unsigned char)(file_size >> 24);  /* bfSize */
+            wk_bitmap_buf[6]  = 0;  /* bfReserved1 */
+            wk_bitmap_buf[7]  = 0;  /* bfReserved1 */
+            wk_bitmap_buf[8]  = 0;  /* bfReserved2 */
+            wk_bitmap_buf[9]  = 0;  /* bfReserved2 */
+            wk_bitmap_buf[10] = (unsigned char)(offset_size >> 0);   /* bfOffBits */
+            wk_bitmap_buf[11] = (unsigned char)(offset_size >> 8);   /* bfOffBits */
+            wk_bitmap_buf[12] = (unsigned char)(offset_size >> 16);  /* bfOffBits */
+            wk_bitmap_buf[13] = (unsigned char)(offset_size >> 24);  /* bfOffBits */
+            fwrite(wk_bitmap_buf, sizeof(char), 14, fp);
+
+            /* BITMAPINFOHEADER */
+            wk_bitmap_buf[0]  = 40; /* biSize */
+            wk_bitmap_buf[1]  = 0;  /* biSize */
+            wk_bitmap_buf[2]  = 0;  /* biSize */
+            wk_bitmap_buf[3]  = 0;  /* biSize */
+            wk_bitmap_buf[4]  = (unsigned char)(pic_width >> 0);    /* biWidth */
+            wk_bitmap_buf[5]  = (unsigned char)(pic_width >> 8);    /* biWidth */
+            wk_bitmap_buf[6]  = (unsigned char)(pic_width >> 16);   /* biWidth */
+            wk_bitmap_buf[7]  = (unsigned char)(pic_width >> 24);   /* biWidth */
+            wk_bitmap_buf[8]  = (unsigned char)(pic_height >> 0);   /* biHeight */
+            wk_bitmap_buf[9]  = (unsigned char)(pic_height >> 8);   /* biHeight */
+            wk_bitmap_buf[10] = (unsigned char)(pic_height >> 16);  /* biHeight */
+            wk_bitmap_buf[11] = (unsigned char)(pic_height >> 24);  /* biHeight */
+            wk_bitmap_buf[12] = 1;  /* biPlanes */
+            wk_bitmap_buf[13] = 0;  /* biPlanes */
+            wk_bitmap_buf[14] = 32; /* biBitCount */
+            wk_bitmap_buf[15] = 0;  /* biBitCount */
+            fwrite(wk_bitmap_buf, sizeof(char), 16, fp);
+
+            wk_bitmap_buf[0]  = 0;  /* biCopmression */
+            wk_bitmap_buf[1]  = 0;  /* biCopmression */
+            wk_bitmap_buf[2]  = 0;  /* biCopmression */
+            wk_bitmap_buf[3]  = 0;  /* biCopmression */
+            wk_bitmap_buf[4]  = (unsigned char)(pic_size >> 0);   /* biSizeImage */
+            wk_bitmap_buf[5]  = (unsigned char)(pic_size >> 8);   /* biSizeImage */
+            wk_bitmap_buf[6]  = (unsigned char)(pic_size >> 16);  /* biSizeImage */
+            wk_bitmap_buf[7]  = (unsigned char)(pic_size >> 24);  /* biSizeImage */
+            wk_bitmap_buf[8]  = 0;  /* biXPixPerMeter */
+            wk_bitmap_buf[9]  = 0;  /* biXPixPerMeter */
+            wk_bitmap_buf[10] = 0;  /* biXPixPerMeter */
+            wk_bitmap_buf[11] = 0;  /* biXPixPerMeter */
+            wk_bitmap_buf[12] = 0;  /* biYPixPerMeter */
+            wk_bitmap_buf[13] = 0;  /* biYPixPerMeter */
+            wk_bitmap_buf[14] = 0;  /* biYPixPerMeter */
+            wk_bitmap_buf[15] = 0;  /* biYPixPerMeter */
+            fwrite(wk_bitmap_buf, sizeof(char), 16, fp);
+
+            wk_bitmap_buf[0]  = 0;  /* biClrUsed */
+            wk_bitmap_buf[1]  = 0;  /* biClrUsed */
+            wk_bitmap_buf[2]  = 0;  /* biClrUsed */
+            wk_bitmap_buf[3]  = 0;  /* biClrUsed */
+            wk_bitmap_buf[4]  = 0;  /* biCirImportant */
+            wk_bitmap_buf[5]  = 0;  /* biCirImportant */
+            wk_bitmap_buf[6]  = 0;  /* biCirImportant */
+            wk_bitmap_buf[7]  = 0;  /* biCirImportant */
+            fwrite(wk_bitmap_buf, sizeof(char), 8, fp);
+
+            save_file_size    = 54;
+            for (cnt = 0; cnt < pic_height; cnt ++) {
+                save_file_size += fwrite(&buf[write_index], sizeof(char), buf_stride, fp);
+                write_index -= buf_stride;
+            }
+            fclose(fp);
+        }
+
+        return (int)save_file_size;
+    };
+};