fix hardware DC object creation issue in rtgui_dc_begin_drawing function.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@874 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/rtgui/common/dc_client.c

@@ -42,7 +42,8 @@ static void rtgui_dc_client_get_rect(struct rtgui_dc* dc, rtgui_rect_t* rect);
 
 struct rtgui_dc* rtgui_dc_begin_drawing(rtgui_widget_t* owner)
 {
-	if (rtgui_region_is_flat(&owner->clip) == RT_EOK)
+	if ((rtgui_region_is_flat(&owner->clip) == RT_EOK) && 
+		rtgui_rect_is_equal(&(owner->extent), &(owner->clip.extents)) == RT_EOK)
 	{
 		/* use hardware DC */
 		return rtgui_dc_hw_create(owner);

components/rtgui/common/font_freetype.c

@@ -1,3 +1,4 @@
+#ifdef RTGUI_USING_TTF
 #include <rtgui/dc.h>
 #include <rtgui/font.h>
 #include <rtgui/tree.h>
@@ -199,3 +200,4 @@ void rtgui_freetype_font_destroy(rtgui_font_t* font)
 	rtgui_free(freetype);
 	rtgui_free(font);
 }
+#endif

components/rtgui/common/region.c

@@ -2239,3 +2239,14 @@ int rtgui_rect_is_intersect(const rtgui_rect_t *rect1, const rtgui_rect_t *rect2
 
 	return -RT_ERROR;
 }
+
+int rtgui_rect_is_equal(const rtgui_rect_t *rect1, const rtgui_rect_t *rect2)
+{
+	if (*((rt_uint32_t*)(rect1)) == *((rt_uint32_t*)(rect2)) &&
+		*(((rt_uint32_t*)(rect1)) + 1) == *(((rt_uint32_t*)(rect2)) + 1))
+	{
+		return RT_EOK;
+	}
+
+	return -RT_ERROR;
+}

components/rtgui/include/rtgui/region.h

@@ -93,6 +93,7 @@ void rtgui_rect_inflate(rtgui_rect_t *rect, int d);
 void rtgui_rect_intersect(rtgui_rect_t *src, rtgui_rect_t *dest);
 int  rtgui_rect_contains_point(const rtgui_rect_t *rect, int x, int y);
 int  rtgui_rect_is_intersect(const rtgui_rect_t *rect1, const rtgui_rect_t *rect2);
+int  rtgui_rect_is_equal(const rtgui_rect_t *rect1, const rtgui_rect_t *rect2);
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }