Python wrappers for font methods

.gitignore

@@ -1,6 +1,7 @@
 *.o
 *.a
 *.so
+*.sw[pc]
 /led-matrix
 /minimal-example
 /text-example

rgbmatrix.cc

@@ -10,15 +10,16 @@
 #include <python2.7/Python.h>
 #include <python2.7/Imaging.h>
 #include "led-matrix.h"
+#include "graphics.h"
 
 using rgb_matrix::GPIO;
 using rgb_matrix::RGBMatrix;
 
 static GPIO io;
 
 typedef struct { // Python object for matrix
-	PyObject_HEAD
-	RGBMatrix *matrix;
+       PyObject_HEAD
+       RGBMatrix *matrix;
 } RGBmatrixObject;
 
 // Rows & chained display values are currently both required parameters.
@@ -105,7 +106,7 @@ static PyObject *SetPixel(RGBmatrixObject *self, PyObject *arg) {
 }
 
 // Copy whole display buffer to display from a list of bytes [R1,G1,B1,R2,G2,B2...]
-static PyObject *SetBuffer(RGBmatrixObject *self, PyObject *data) 
+static PyObject *SetBuffer(RGBmatrixObject *self, PyObject *data)
 {
 	Py_ssize_t count;
 	int        w, h, offset, y, x;
@@ -122,9 +123,9 @@ static PyObject *SetBuffer(RGBmatrixObject *self, PyObject *data)
 		return NULL;
 	}
 
-	for(y=0; y<h; y++) 
+	for(y=0; y<h; y++)
 	{
-		for(x=0; x<w; x++) 
+		for(x=0; x<w; x++)
 		{
 			offset = (y*w*3)+(x*3);
 			r = PyInt_AsLong(PyList_GetItem(data, offset));
@@ -249,6 +250,29 @@ static PyObject *SetWriteCycles(RGBmatrixObject *self, PyObject *arg) {
 	return Py_None;
 }
 
+static PyObject *DrawText(RGBmatrixObject *self, PyObject *arg) {
+	const char *bdf_font_file = NULL;
+	rgb_matrix::Font font;
+	uint32_t x, y;
+	uint8_t  r, g, b;
+	char *utf8_text; // NOTE this should be UTF-8 encoded text
+	if((PyTuple_Size(arg) == 7) &&
+	  PyArg_ParseTuple(arg, "sIIBBBs", &bdf_font_file, &x, &y, &r, &g, &b, &utf8_text)) {
+		rgb_matrix::Color color(r, g, b);
+		if (!font.LoadFont(bdf_font_file)) {
+			PyErr_SetString(PyExc_ValueError,
+			  "Can not read BDF font file.");
+			return NULL;
+		}
+		rgb_matrix::DrawText(
+		  self->matrix, font, x, y + font.baseline(), color, utf8_text);
+	}
+	// TODO pass the integer returned by DrawText back to Python
+
+	Py_INCREF(Py_None);
+	return Py_None;
+}
+
 static PyMethodDef methods[] = {
   { "Clear"         , (PyCFunction)Clear         , METH_NOARGS , NULL },
   { "Fill"          , (PyCFunction)Fill          , METH_VARARGS, NULL },
@@ -257,6 +281,7 @@ static PyMethodDef methods[] = {
   { "SetImage"      , (PyCFunction)SetImage      , METH_VARARGS, NULL },
   { "SetPWMBits"    , (PyCFunction)SetPWMBits    , METH_VARARGS, NULL },
   { "SetWriteCycles", (PyCFunction)SetWriteCycles, METH_VARARGS, NULL },
+  { "DrawText"      , (PyCFunction)DrawText      , METH_VARARGS, NULL },
   { NULL, NULL, 0, NULL }
 };
 

texttest.py

@@ -0,0 +1,17 @@
+#!/usr/bin/python
+
+import sys, time
+from rgbmatrix import Adafruit_RGBmatrix
+
+font_width  = 4
+font_height = 6
+lines = ["Hi Mom!", "I'm cool."]
+
+matrix = Adafruit_RGBmatrix(16, 1)
+bdf_font_file = "fonts/{0}x{1}.bdf".format(font_width, font_height)
+matrix.DrawText(bdf_font_file, 1, 1, 0xFF, 0xFF, 0, lines[0])
+time.sleep(2.0)
+matrix.DrawText(bdf_font_file, 1, 1 + font_height, 0xFF, 0, 0xFF, lines[1])
+time.sleep(10.0)
+
+matrix.Clear()