added stock bitmap handling and support for it in the demo script

scripts/demo1.py

@@ -6,7 +6,14 @@ WHITE = upiwin.rgb(255, 255, 255)
 LTGRAY = upiwin.rgb(204, 204, 204)
 YELLOW = upiwin.rgb(255, 255, 0)
 
+# Get the stock bitmaps.
+bmp_freehand = upiwin.Bitmap(stock='freehand')
+bmp_line = upiwin.Bitmap(stock='line')
+bmp_rect = upiwin.Bitmap(stock='rect')
+bmp_fillrect = upiwin.Bitmap(stock='fillrect')
+
 hdc = upiwin.DevCtxt(type='screen')
+hdc_bits = upiwin.DevCtxt(type='memory')
 
 # divide the screen into "drawing" and "command" areas
 screen_rect = hdc.get_clip_rect()
@@ -100,6 +107,9 @@ hdc.rectangle(cmd2_rect[0], cmd2_rect[1], cmd2_rect[2], cmd2_rect[3])
 hdc.rectangle(cmd3_rect[0], cmd3_rect[1], cmd3_rect[2], cmd3_rect[3])
 hdc.rectangle(cmd4_rect[0], cmd4_rect[1], cmd4_rect[2], cmd4_rect[3])
 
+hdc_bits.select_object(bmp_freehand)
+hdc.bitblt(cmd1_rect[0] + 6, cmd1_rect[1] + 6, cmd1_rect[0] + 54, cmd1_rect[1] + 54, hdc_bits, 0, 0, 0)
+
 # Main message loop
 msg = {}
 while upiwin.get_message(msg):

src/Makefile

@@ -4,7 +4,7 @@ SPLASHSCREEN=splash-vmwcblk.png
 
 OBJS=main.o sysinput.o ep_init.o ep_upiwin.o ep_backlight.o ep_msg.o ep_graphics.o ep_devctxt.o ep_bitmap.o \
      ep_upiwin_tmp.o ep_util.o fbinit.o rect.o gfxobj.o devctxt.o dc_screen.o fontengine.o \
-	 bitmap.o fbprimitive.o log.o gpio.o msg_queue.o time_func.o config.o \
+	 bitmap.o stockobj.o fbprimitive.o log.o gpio.o msg_queue.o time_func.o config.o \
 	 i_freehand.o i_line.o i_rect.o i_fillrect.o splash.o
 LIBS=-lpython3.7m -lcrypt -lfreetype -lbcm2835 -lpthread -ldl -lutil -lm
 CFLAGS=-I/usr/include/python3.7m -I/usr/include/freetype2 -I/usr/include/libpng16 \

src/bitmap.h

@@ -16,4 +16,6 @@ typedef struct tagBITMAP {
 extern PBITMAP BMP_Create(INT32 width, INT32 height, const void *bits);
 extern void BMP_Delete(PBITMAP pbmp);
 
+extern PBITMAP _BMP_GetStock(PCSTR name);
+
 #endif /* __BITMAP_H_INCLUDED */

src/ep_bitmap.c

@@ -40,19 +40,32 @@ static PyGetSetDef BitmapProperties[] = {
 
 static int bitmap_init(BitmapObject *self, PyObject *args, PyObject *kwds)
 {
-  static char *kwlist[] = { "width", "height", NULL };
+  static char *kwlist[] = { "stock", "width", "height", NULL };
+  const char *stock;
   int width = 0, height = 0;
   
-  if (!PyArg_ParseTupleAndKeywords(args, kwds, "$ii", kwlist, &width, &height))
+  if (!PyArg_ParseTupleAndKeywords(args, kwds, "$sii", kwlist, &stock, &width, &height))
     return -1;
   
-  width = MAX(1, width);
-  height = MAX(1, height);
-  self->pbmp = BMP_Create(width, height, NULL);
-  if (!(self->pbmp))
+  if (stock)
   {
+	self->pbmp = _BMP_GetStock(stock);
+	if (!(self->pbmp))
+	{
+	  PyErr_Format(PyExc_RuntimeError, "no such stock bitmap: '%s'", stock);
+	  return -1;
+	}
+  }
+  else
+  {
+    width = MAX(1, width);
+    height = MAX(1, height);
+    self->pbmp = BMP_Create(width, height, NULL);
+    if (!(self->pbmp))
+    {
 	  PyErr_SetString(PyExc_RuntimeError, "unable to create bitmap");
 	  return -1;
+    }
   }
   return 0;
 }

src/stockobj.c

@@ -0,0 +1,46 @@
+#include <stddef.h>
+#include <string.h>
+#include "wintype.h"
+#include "bitmap.h"
+
+/* references to the icon data */
+extern uint8_t _binary_i_freehand_bin_start[];
+extern uint8_t _binary_i_freehand_bin_end;
+extern uint8_t _binary_i_freehand_bin_size;
+
+extern uint8_t _binary_i_line_bin_start[];
+extern uint8_t _binary_i_line_bin_end;
+extern uint8_t _binary_i_line_bin_size;
+
+extern uint8_t _binary_i_rect_bin_start[];
+extern uint8_t _binary_i_rect_bin_end;
+extern uint8_t _binary_i_rect_bin_size;
+
+extern uint8_t _binary_i_fillrect_bin_start[];
+extern uint8_t _binary_i_fillrect_bin_end;
+extern uint8_t _binary_i_fillrect_bin_size;
+
+typedef struct tagSTOCKBITMAPDESC {
+  PCSTR name;
+  INT32 width;
+  INT32 height;
+  const void *data;
+} STOCKBITMAPDESC;
+
+static const STOCKBITMAPDESC stock_bitmaps = {
+  {"freehand", 48, 48, _binary_i_freehand_bin_start },
+  {"line", 48, 48, _binary_i_line_bin_start },
+  {"rect", 48, 48, _binary_i_rect_bin_start },
+  {"fillrect", 48, 48, _binary_i_fillrect_bin_start },
+  {NULL, 0, 0, NULL }
+};
+
+PBITMAP _BMP_GetStock(PCSTR name)
+{
+  INT32 i;
+  
+  for (i = 0; stock_bitmaps[i].name; ++i)
+    if (strcmp(name, stock_bitmaps[i].name) == 0)
+	  return BMP_Create(stock_bitmaps[i].width, stock_bitmaps[i].height, stock_bitmaps[i].data);
+  return NULL;
+}