Initial commit

src/c/palette_manip.c

@@ -0,0 +1,41 @@
+// TAKEN FROM https://github.com/rebootsramblings/GBitmap-Colour-Palette-Manipulator
+
+#include "palette_manip.h"
+
+#ifdef PBL_COLOR
+
+int get_num_palette_colors(GBitmap *b){
+	GBitmapFormat format = gbitmap_get_format(b);
+	switch (format) {
+		case GBitmapFormat1Bit: return 0;
+		case GBitmapFormat8Bit: return 0;
+		case GBitmapFormat1BitPalette: return 2;
+		case GBitmapFormat2BitPalette: return 4;
+		case GBitmapFormat4BitPalette: return 16;
+		default: return 0;
+	}
+}
+
+void replace_gbitmap_color(GColor color_to_replace, GColor replace_with_color, GBitmap *im, BitmapLayer *bml){
+	//First determine what the number of colors in the palette
+	int num_palette_items = get_num_palette_colors(im);
+
+	//Get the gbitmap's current palette
+	GColor *current_palette = gbitmap_get_palette(im);
+
+	//Iterate through the palette finding the color we want to replace and replacing 
+	//it with the new color
+	for(int i = 0; i < num_palette_items; i++){
+		if ((color_to_replace.argb & 0x3F)==(current_palette[i].argb & 0x3F)){
+			current_palette[i].argb = (current_palette[i].argb & 0xC0)| (replace_with_color.argb & 0x3F);
+		}
+	}
+
+	//Mark the bitmaplayer dirty
+	if(bml != NULL){
+		layer_mark_dirty(bitmap_layer_get_layer(bml));
+	}
+
+}
+
+#endif