* top level GDI functions return 0 on error and != 0 otherwise but the
low level functions (16bpp.c, 8bpp.c 32bpp.c) which are called did it
exactly the other way around. Those were adapted.
* change gdi_InvalidateRegion to BOOL and check calls where appropriate
* integrate comments from pull request
(freerdp_color_convert_drawing_order_color_to_gdi_color): Declare new
function.
* libfreerdp/codec/color.c:
(freerdp_color_convert_drawing_order_color_to_gdi_color): Implement.
(freerdp_image_convert_8bpp): Properly use the ARGB32/ABGR32/RGB32/BGR32
macros when converting 8bpp data to 32bpp.
(freerdp_image_convert_32bpp): Fix CLRCONV_ALPHA and CLRCONV_INVERT
processing for 32bpp destination.
(freerdp_mono_image_convert): Use ARGB32/ABGR32 when converting to 32bpp
and CLRCONV_ALPHA is set.
* libfreerdp/core/orders.c: Color data from drawing orders is
interpreted in big endian mode.
* libfreerdp/core/update.c (update_read_palette): Likewise.
* libfreerdp/gdi/16bpp.c (gdi_get_color_16bpp): GDI colors are stored as
RGB now.
* libfreerdp/gdi/32bpp.c (gdi_get_color_32bpp): Likewise.
* libfreerdp/gdi/gdi.c:
Use freerdp_color_convert_drawing_order_color_to_gdi_color() to convert
from drawing order color representation to GDI color representation
troughout.
* libfreerdp/gdi/graphics.c (gdi_Glyph_BeginDraw): Likewise.
(gdi_Glyph_EndDraw): Likewise.
