Revoke changes made to pixel buffering in API

backend/bmp.c

@@ -49,6 +49,7 @@ int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
     int row_size;
     unsigned int data_size;
     unsigned char *bitmap_file_start, *bmp_posn;
+    char *bitmap;
     FILE *bmp_file;
     bitmap_file_header_t file_header;
     bitmap_info_header_t info_header;
@@ -57,7 +58,7 @@ int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
         free(symbol->bitmap);
 
     row_size = 4 * floor((24.0 * symbol->bitmap_width + 31) / 32);
-    symbol->bitmap = (char *) malloc(row_size * symbol->bitmap_height);
+    bitmap = (char *) malloc(row_size * symbol->bitmap_height);
 
     fgred = (16 * ctoi(symbol->fgcolour[0])) + ctoi(symbol->fgcolour[1]);
     fggrn = (16 * ctoi(symbol->fgcolour[2])) + ctoi(symbol->fgcolour[3]);
@@ -73,14 +74,14 @@ int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
             i = (3 * column) + (row * row_size);
             switch (*(pixelbuf + (symbol->bitmap_width * (symbol->bitmap_height - row - 1)) + column)) {
                 case '1':
-                    symbol->bitmap[i] = fgblu;
+                    bitmap[i] = fgblu;
-                    symbol->bitmap[i + 1] = fggrn;
+                    bitmap[i + 1] = fggrn;
-                    symbol->bitmap[i + 2] = fgred;
+                    bitmap[i + 2] = fgred;
                     break;
                 default:
-                    symbol->bitmap[i] = bgblu;
+                    bitmap[i] = bgblu;
-                    symbol->bitmap[i + 1] = bggrn;
+                    bitmap[i + 1] = bggrn;
-                    symbol->bitmap[i + 2] = bgred;
+                    bitmap[i + 2] = bgred;
                     break;
 
             }
@@ -115,7 +116,7 @@ int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
     bmp_posn += sizeof (bitmap_file_header_t);
     memcpy(bmp_posn, &info_header, sizeof (bitmap_info_header_t));
     bmp_posn += sizeof (bitmap_info_header_t);
-    memcpy(bmp_posn, symbol->bitmap, data_size);
+    memcpy(bmp_posn, bitmap, data_size);
 
     /* Open output file in binary mode */
     if ((symbol->output_options & BARCODE_STDOUT) != 0) {
@@ -137,5 +138,6 @@ int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
     fclose(bmp_file);
 
     free(bitmap_file_start);
+    free(bitmap);
     return 0;
 }

backend/library.c

@@ -1177,7 +1177,7 @@ int ZBarcode_Buffer(struct zint_symbol *symbol, int rotate_angle) {
             return ZINT_ERROR_INVALID_OPTION;
     }
 
-    error_number = plot_raster(symbol, rotate_angle, OUT_BMP_FILE);
+    error_number = plot_raster(symbol, rotate_angle, OUT_BUFFER);
     error_tag(symbol->errtxt, error_number);
     return error_number;
 }

backend/raster.c

@@ -53,6 +53,40 @@ extern int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf);
 extern int pcx_pixel_plot(struct zint_symbol *symbol, char *pixelbuf);
 extern int gif_pixel_plot(struct zint_symbol *symbol, char *pixelbuf);
 
+void buffer_plot(struct zint_symbol *symbol, char *pixelbuf) {
+    /* Place pixelbuffer into symbol */
+    int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
+    int row, column, i;
+    
+    symbol->bitmap = (char *) malloc(symbol->bitmap_width * symbol->bitmap_height * 3);
+    
+    fgred = (16 * ctoi(symbol->fgcolour[0])) + ctoi(symbol->fgcolour[1]);
+    fggrn = (16 * ctoi(symbol->fgcolour[2])) + ctoi(symbol->fgcolour[3]);
+    fgblu = (16 * ctoi(symbol->fgcolour[4])) + ctoi(symbol->fgcolour[5]);
+    bgred = (16 * ctoi(symbol->bgcolour[0])) + ctoi(symbol->bgcolour[1]);
+    bggrn = (16 * ctoi(symbol->bgcolour[2])) + ctoi(symbol->bgcolour[3]);
+    bgblu = (16 * ctoi(symbol->bgcolour[4])) + ctoi(symbol->bgcolour[5]);
+    
+    for (row = 0; row < symbol->bitmap_height; row++) {
+        for (column = 0; column < symbol->bitmap_width; column++) {
+            i = ((row * symbol->bitmap_width) + column) * 3;
+            switch (*(pixelbuf + (symbol->bitmap_width * (symbol->bitmap_height - row - 1)) + column)) {
+                case '1':
+                    symbol->bitmap[i] = fgred;
+                    symbol->bitmap[i + 1] = fggrn;
+                    symbol->bitmap[i + 2] = fgblu;
+                    break;
+                default:
+                    symbol->bitmap[i] = bgred;
+                    symbol->bitmap[i + 1] = bggrn;
+                    symbol->bitmap[i + 2] = bgblu;
+                    break;
+
+            }
+        }
+    }
+}
+
 int save_raster_image_to_file(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle, int image_type) {
     int error_number;
     int row, column;
@@ -135,6 +169,10 @@ int save_raster_image_to_file(struct zint_symbol *symbol, int image_height, int
     }
     
     switch (image_type) {
+        case OUT_BUFFER:
+            buffer_plot(symbol, rotated_pixbuf);
+            error_number = 0;
+            break;
         case OUT_PNG_FILE:
 #ifndef NO_PNG
             error_number = png_pixel_plot(symbol, rotated_pixbuf);

backend/zint.h

@@ -229,6 +229,7 @@ extern "C" {
 #define ZINT_ERROR_MEMORY		11
     
 // Raster file types
+#define OUT_BUFFER          0
 #define	OUT_PNG_FILE        100
 #define	OUT_BMP_FILE        120
 #define OUT_GIF_FILE        140