Diff: GFXFb.cpp

Revision:

0:0fdadbc3d852

Child:

4:b32cf4ef45c5

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GFXFb.cpp	Thu Sep 26 06:37:02 2013 +0000
@@ -0,0 +1,94 @@
+#include "mbed.h"
+#include "GFXFb.h"
+
+
+GFXFb::GFXFb(uint16_t w, uint16_t h, uint16_t* fb) : Adafruit_GFX(w, h) {
+    _fb = fb;
+}
+
+
+void GFXFb::drawPixel(int16_t x, int16_t y, uint16_t color) {
+    if (_fb == 0) return;
+
+    if (x < 0 || x >= width() || y < 0 || y >= height()) return;
+
+    *(_fb + x + y*_width ) = color;
+}
+
+void GFXFb::drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color) {
+    int16_t y2 = y + h - 1;
+
+    if (y < 0) y = 0;
+    if (y2 >= _height) y2 = _height-1;
+
+    if (_fb == 0) return;
+    if (x < 0 || x >= _width || y >= _height || y2 < y) return;
+
+    uint16_t* f = (_fb + x + y*_width);
+    while(y <= y2) {
+
+        *f = color;
+        f += _width;
+        y++;
+    }
+
+}
+
+void GFXFb::drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color) {
+    int16_t x2 = x + w - 1;
+
+    if (x < 0) x = 0;
+    if (x2 >= _width) x2 = _width-1;
+
+    if (_fb == 0) return;
+    if (x >= _width || x2 < x || y < 0 || y >= _height) return;
+
+    uint16_t* f = (_fb + x + y*_width);
+    while(x <= x2) {
+
+        *f++ = color;
+        x++;
+    }
+
+}
+
+
+void GFXFb::fillScreen(uint16_t color) {
+
+    if (_fb == 0) return;
+
+    int len = _width*_height;
+    for (int i = 0; i < len; i++) {
+        *(_fb+i) = color;
+    }
+}
+
+void GFXFb::writeString(const char* s) {
+    if (s == NULL) return;
+
+    while(*s != 0) {
+        write(*s);
+        s++;
+    }
+}
+
+int16_t GFXFb::getStringWidth(const char* s) {
+    // the default font in GFX is 6 pixels in width
+    int chWidth = 6*textsize;
+    int sz = 0;
+
+    while(*s != 0) {
+        sz += chWidth;
+        s++;
+    }
+
+    return sz;
+}
+
+int16_t GFXFb::getStringHeight(const char* s) {
+    (void)s;
+    // the default font in GFX is 8 pixels in height
+    return 8;
+}
+
+