Print file number of stored image

build-number.txt

@@ -1 +1 @@
-615
+641

src/bmp.c

@@ -64,7 +64,7 @@ void BMP_ConstructFilename(int number, char *buffer, unsigned int size)
     memcpy(buffer + size - 5, ".BMP", 5);
 }
 
-void BMP_Save(uint8_t *data, int width, int height)
+int BMP_Save(uint8_t *data, int width, int height)
 {
     FATFS fs;
     FIL fp;
@@ -74,19 +74,19 @@ void BMP_Save(uint8_t *data, int width, int height)
     rc = f_mount(&fs, "", 0);
     if(rc)
     {
-        return;
+        return -1;
     }
 
     int file_number = BMP_PickFileNumber();
     if(file_number == -1)
-        return;
+        return -2;
     char filename[13];
     BMP_ConstructFilename(file_number, filename, sizeof(filename));
 
     rc = f_open(&fp, filename, FA_WRITE | FA_CREATE_NEW);
     if(rc)
     {
-        return;
+        return -3;
     }
 
     // Rows must be padded to a multiple of 4 bytes
@@ -121,24 +121,26 @@ void BMP_Save(uint8_t *data, int width, int height)
     };
 
     if(f_write(&fp, &file_header, sizeof(file_header), &bw) != FR_OK)
-        return;
+        return -4;
     if(f_write(&fp, &core_header, sizeof(core_header), &bw) != FR_OK)
-        return;
+        return -4;
     if(f_write(&fp, &colour_table, sizeof(colour_table), &bw) != FR_OK)
-        return;
+        return -4;
 
     // BMPs are stored with their rows from the bottom upwards
     for(int y = height - 1; y >= 0; y--)
     {
         uint8_t *row = data + y * (width / 8);
         if(f_write(&fp, row, width / 8, &bw) != FR_OK)
-            return;
+            return -4;
         if(padding_length != 0)
         {
             if(f_write(&fp, padding_bytes, padding_length, &bw) != FR_OK)
-                return;
+                return -4;
         }
     }
 
     f_close(&fp);
+
+    return file_number;
 }

src/bmp.h

@@ -4,4 +4,4 @@
 #include <string.h>
 #include <stdlib.h>
 
-void BMP_Save(uint8_t *data, int width, int height);
+int BMP_Save(uint8_t *data, int width, int height);

src/config.h

@@ -18,4 +18,7 @@
 #define CONFIG_MAX_FRAMES       15
 
 // Print number of black pixels per captured frame
-// #define CONFIG_PRINT_EXPOSURE_DEBUG_INFORMATION
+// #define CONFIG_PRINT_EXPOSURE_DEBUG_INFORMATION
+
+// Print file number if a file was saved to SD card
+#define CONFIG_PRINT_FILE_NUMBER

src/main.c

@@ -14,8 +14,7 @@ int main(void)
     Camera_Init();
     LTP1245_Init();
 
-    LTP1245_FeedPaper(100);
+    LTP1245_FeedPaper(50);
-    LTP1245_FeedPaper(10);
 
     while(!Camera_Captured);
 
@@ -26,8 +25,9 @@ int main(void)
     char buffer[32] = "Finished after lines: ";
     itoa(Camera_FinalFrameCount, buffer + strlen(buffer), 10);
 
-    Print_Text(buffer, &Arpegius_32);
+    Print_Text(buffer, &Hannover_Messe_Serif_26, Print_LeftAligned);
-    Print_Text("Black pixel counts:", &Arpegius_32);
+    Print_Text("Black pixel counts:", &Hannover_Messe_Serif_26,
+        Print_LeftAligned);
     for(int i = 0; i < Camera_FinalFrameCount; i++)
     {
         if(i >= (int)(sizeof(Camera_BlackPixelCounts)
@@ -36,14 +36,26 @@ int main(void)
             break;
         }
         itoa(Camera_BlackPixelCounts[i], buffer, 10);
-        Print_Text(buffer, &Arpegius_32);
+        Print_Text(buffer, &Hannover_Messe_Serif_26, Print_LeftAligned);
     }
 #endif
 
-    LTP1245_FeedPaper(100);
+    int file_number = BMP_Save(ImageBuffer, CAMERA_IMAGE_WIDTH,
+        CAMERA_IMAGE_HEIGHT);
+    (void)file_number;
 
-    BMP_Save(ImageBuffer, CAMERA_IMAGE_WIDTH, CAMERA_IMAGE_HEIGHT);
+#ifdef CONFIG_PRINT_FILE_NUMBER
+    LTP1245_FeedPaper(10);
+    char buffer[32] = "-   ";
+    if(file_number >= 0)
+    {
+        itoa(file_number, buffer + strlen(buffer), 10);
+        strcpy(buffer + strlen(buffer), "   -");
+        Print_Text(buffer, &Hannover_Messe_Serif_26, Print_Centred);
+    }
+#endif
     
+    LTP1245_FeedPaper(80);
     LTP1245_FeedPaper(10);
 
     GPIOC->BRR = (1 << PIN_SUPPLY);

src/print.c

@@ -3,12 +3,45 @@
 
 static uint8_t Print_Buffer[PRINT_BUFFER_LINES * LTP1245_LINE_BYTES];
 
-void Print_Text(const char *text, const Font_t *font)
+int Print_MeasureTextWidth(const char *text, const Font_t *font)
+{
+    char c;
+    int width = 0;
+    while((c = *text++) != 0)
+    {
+        if(c > font->glyphcount + font->charoffset
+            || c < font->charoffset)
+        {
+            continue;
+        }
+
+        width += font->glyphs[c - font->charoffset].width;
+    }
+    return width;
+}
+
+void Print_Text(const char *text, const Font_t *font,
+    Print_TextAlignment_t alignment)
 {
     int height = font->height;
     memset(Print_Buffer, 0, LTP1245_LINE_BYTES * height);
     char c;
     int xpos = 0;
+    if(alignment != Print_LeftAligned)
+    {
+        int width = Print_MeasureTextWidth(text, font);
+        if(width < LTP1245_LINEWIDTH)
+        {
+            if(alignment == Print_Centred)
+            {
+                xpos = LTP1245_LINEWIDTH / 2 - width / 2;
+            }
+            else
+            {
+                xpos = LTP1245_LINEWIDTH - width;
+            }
+        }
+    }
     while((c = *text++) != 0)
     {
         if(c > font->glyphcount + font->charoffset

src/print.h

@@ -7,5 +7,13 @@
 
 #define PRINT_BUFFER_LINES      64
 
-void Print_Text(const char *text, const Font_t *font);
+typedef enum
+{
+    Print_LeftAligned,
+    Print_Centred,
+    Print_RightAligned,
+} Print_TextAlignment_t;
+
+void Print_Text(const char *text, const Font_t *font,
+    Print_TextAlignment_t alignment);
 void Print_Image(const uint8_t *data, int width, int height, int scale);