create generic buffer template

OBJECTS

@@ -1,7 +1,7 @@
 TARGET = main
 SRC = hal.cpp main.cpp example.cpp
 
-SRC += gfx/screen.cpp gfx/canvas.cpp gfx/font.cpp gfx/layout.cpp
+SRC += gfx/screen.cpp gfx/canvas.cpp gfx/font.cpp gfx/layout.cpp gfx/buffer.cpp
 
 SRC += fonts/basic_5x4.cpp
 

inc/gfx/buffer.h

@@ -0,0 +1,50 @@
+//
+// Created by jedi on 11/2/18.
+//
+
+#ifndef MGL_DMXMENU_BUFFER_1_H
+#define MGL_DMXMENU_BUFFER_1_H
+
+
+#include <stdlib.h>
+#include <stdint.h>
+
+enum bufferBlocks{
+    _1bit = 1, _2bit = 2, _4bit = 4, _8bit = 8, _16bit = 16, _24bit = 24, _32bit = 32
+};
+
+template <bufferBlocks N>
+class buffer {
+private:
+    int *ptr_;
+    int size_;
+    constexpr static const int block_ = 8 * sizeof(int);
+public:
+    buffer(int size) : size_(size) {
+        ptr_ = (int *) malloc(size * N / 8);
+    }
+
+    int get(int i) {
+        if (i >= size_) return 0;
+        return ptr_[i*N/block_] & ((1<<N)-1) << (i*N%block_);
+    }
+
+    void set(int i, int v) {
+        if (i < size_) {
+            ptr_[i*N/block_] &= ~(((1<<N)-1) << (i*N%block_));
+            ptr_[i*N/block_] |= (((1<<N)-1)&v) << (i*N%block_);
+        }
+    }
+
+    ~buffer() {
+        free(ptr_);
+    }
+};
+
+template <>
+int buffer<_32bit>::get(int i);
+
+template <>
+void buffer<_32bit>::set(int i, int v);
+
+#endif //MGL_DMXMENU_BUFFER_1_H

inc/gfx/buffer_1.h

@@ -1,40 +0,0 @@
-//
-// Created by jedi on 11/2/18.
-//
-
-#ifndef MGL_DMXMENU_BUFFER_1_H
-#define MGL_DMXMENU_BUFFER_1_H
-
-
-#include <stdlib.h>
-#include <stdint.h>
-
-class buffer_1 {
-private:
-    int *ptr_;
-    int size_;
-    constexpr static const int block_ = 8 * sizeof(int);
-public:
-    buffer_1(int size) : size_(size) {
-        ptr_ = (int *) malloc(size * sizeof(int));
-    }
-
-    bool get(int i) {
-        if (i >= size_) return 0;
-        return ptr_[i/block_] & 1 << (i%block_);
-    }
-
-    void set(int i, bool v) {
-        if (i < size_) {
-            ptr_[i/block_] &= ~(1 << (i%block_));
-            ptr_[i/block_] |= v << (i%block_);
-        }
-    }
-
-    ~buffer_1() {
-        free(ptr_);
-    }
-};
-
-
-#endif //MGL_DMXMENU_BUFFER_1_H

inc/gfx/buffer_32.h

@@ -9,29 +9,7 @@
 #include <stdlib.h>
 #include <stdint.h>
 
-class buffer_32 {
-private:
-    int size_;
-    void *ptr;
-public:
-    buffer_32(int size) : size_(size) {
-        ptr = (uint8_t *) malloc(size * 4);
-    }
 
-    bool get(int i) {
-        if (i >= size_) return 0;
-        return ((int *) ptr)[i];
-    }
-
-    void set(int i, bool v) {
-        if (i < size_)
-            ((int *) ptr)[i] = v;
-    }
-
-    ~buffer_32() {
-        free(ptr);
-    }
-};
 
 
 #endif //MGL_DMXMENU_BUFFER_8_H

inc/gfx/canvas.h

@@ -8,7 +8,7 @@
 #include "hal/hal.h"
 #include "gfx/font.h"
 #include "fonts/basic_5x4.h"
-#include "gfx/buffer_1.h"
+#include "gfx/buffer.h"
 #include "gfx/buffer_32.h"
 
 class screen;
@@ -17,7 +17,7 @@ class canvas {
 private:
     const int width_;
     const int height_;
-    buffer_1 buffer_;
+    buffer<_1bit> buffer_;
 
     void draw_onto_(screen &);
 

src/gfx/buffer.cpp

@@ -0,0 +1,17 @@
+//
+// Created by jedi on 11/2/18.
+//
+
+#include "gfx/buffer.h"
+
+template <>
+int buffer<_32bit>::get(int i){
+    if (i >= size_) return 0;
+    return ptr_[i];
+}
+
+template <>
+void buffer<_32bit>::set(int i, int v) {
+    if (i < size_)
+        ptr_[i] = v;
+}

src/gfx/buffer_1.cpp

@@ -1,5 +0,0 @@
-//
-// Created by jedi on 11/2/18.
-//
-
-#include "gfx/buffer_1.h"