Diff: LCD_ST7735/Canvas.h

Revision:

0:bc3f11b1b41f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD_ST7735/Canvas.h	Sun Feb 08 01:58:57 2015 +0000
@@ -0,0 +1,102 @@
+#include "Base.h"
+
+#ifndef __CANVAS_H__
+#define __CANVAS_H__
+
+template <typename T>
+class Canvas
+{
+    public:
+        Canvas(T &surface) :
+            _surface(surface)
+        {
+            
+        }
+        
+        inline void clear()
+        {
+            _surface.clear();
+        }
+        
+        inline void setPixel(int x, int y, uint16_t color)
+        {
+            _surface.setPixel(x, y, color);
+        }
+        
+        inline uint16_t getPixel(int x, int y)
+        {
+            return _surface.getPixel(x, y);
+        }
+        
+        void drawLine(int x1, int y1, int x2, int y2, uint16_t color)
+        {
+            int dx = abs(x2 - x1);
+            int dy = abs(y2 - y1);
+            
+            if (dx == 0) 
+            {
+                if (y1 > y2) swap(y1, y2);
+                _surface.fastVLine(y1, y2, x1, color);
+                return;
+            }
+            else if(dy == 0)
+            {
+                if (x1 > x2) swap(x1, x2);
+                _surface.fastHLine(x1, x2, y1, color);
+                return;
+            }
+           
+            int sx = (x1 < x2) ? 1 : -1;
+            int sy = (y1 < y2) ? 1 : -1;
+            int err = dx - dy;
+            while(x1 != x2 || y1 != y2)
+            {
+                setPixel(x1, y1, color);
+                int e2 = err << 1;
+                if (e2 > -dy)
+                {
+                    err -= dy;
+                    x1 += sx;            
+                }
+                if (e2 < dx)
+                {
+                    err += dx;
+                    y1 += sy;
+                }
+            }
+            setPixel(x2, y2, color);
+        }
+        
+        void drawRect(int x1, int y1, int x2, int y2, uint16_t color)
+        {
+            if (x1 > x2) swap(x1, x2);
+            if (y1 > y2) swap(y1, y2);
+            
+            _surface.fastHLine(x1, x2, y1, color);
+            _surface.fastHLine(x1, x2, y2, color);
+            
+            _surface.fastVLine(y1, y2, x1, color);
+            _surface.fastVLine(y1, y2, x2, color);            
+        }
+        
+        void fillRect(int x1, int y1, int x2, int y2, uint16_t color)
+        {
+            if (x1 > x2) swap(x1, x2);
+            if (y1 > y2) swap(y1, y2);
+            
+            for (int x = x1; x <= x2; ++x)
+            {
+                _surface.fastVLine(y1, y2, x, color);
+            }
+        }
+        
+        void drawBitmap(int x, int y, T &bmp, int srcX, int srcY, int srcWidth, int srcHeight, bool transparent)
+        {
+            _surface.drawBitmap(x, y, bmp, srcX, srcY, srcWidth, srcHeight, transparent);
+        }
+           
+    private:
+        T &_surface;
+};
+
+#endif // __CANVAS_H__
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