Bitmap and menu updates

[wxWidgets.git] / docs / microwin / readme.txt

diff --git a/docs/microwin/readme.txt b/docs/microwin/readme.txt
index 980f125efe93700598b860a6814f56efd0720034..b775a6d190b3b9c55cbb2ab8247d8da2cfda13b4 100644 (file)
--- a/docs/microwin/readme.txt
+++ b/docs/microwin/readme.txt
@@ -8,15 +8,21 @@ Widgets are supplied by the wxUniversal project, while the
 underlying port uses the Windows ports with small modifications
 for the MicroWindows API.
 
+=== NOTE: ===
+
+  Current efforts are being concentrated on a port to Nano-X,
+  which potentially offers greater flexibility than the WIN32
+  API of MicroWindows, such as the ability to run multiple
+  Nano-X processes simultaneously. Please see
+  ../docs/x11/readme-nanox.txt for information.
+
 There are many things missing from MicroWindows that will
-make the port quite limited for the time being. I haven't
-worked out how to create bitmaps, though there is a BMP to C
-converter. There are no common dialogs (we will use generic ones),
-and only one WIN32 app may be run at a time.
+make the port quite limited for the time being.
+In particular, only one WIN32 app may be run at a time.
 
 Note that you can gain confidence in the WIN32/wxUniversal
 combination by compiling wxUniversal under Windows using VC++,
-using src/wxvc_universal.dsp. You can compile the minimal
+using src/wxUniv.dsp. You can compile the minimal
 and widgets samples in wxUniversal mode using the
 UnivDebug and UnivRelease targets. Most of the code is shared
 between this combination, and the wxMicroWindows port.
@@ -108,6 +114,33 @@ is preferably to proliferating many #ifdefs in the
 wxMSW/wxMicroWindows port itself.
 
 
+Errors/warnings
+===============
+
+In file ../../src/msw/window.cpp at line 1294: 'UpdateWindow' failed with error 0x00000000 (Success).
+
+  - caused because there are no paint messages pending. Presumed
+    harmless.
+
+In file ../../src/msw/dc.cpp at line 1838: 'BitBlt' failed with error 0x00000000 (Success).
+
+  - caused because the window isn't mapped, and MwPrepareDC in wingdi.c
+    fails (hwnd->unmapcount is non-zero). Presumed harmless.
+
+Recursive paint problem, e.g. when clicking the 'Press Me!'
+button in the widgets sample a few times, until the text control
+is full.
+
+  - possibly the scrollbar is causing the text control to be
+    updated, which somehow effects the scrollbar, which causes
+    a window update, etc.
+
+Sluggish updates.
+
+  - probably because many image to bitmap conversions are being
+    done on update, and bitmaps should probably be cached.
+
+
 Things missing from MicroWindows that need to be worked around
 ==============================================================
 
@@ -136,13 +169,11 @@ So how can we convert from wxImage to wxBitmap in MicroWindows?
 Well, a simple-minded way would be to use CreateCompatibleBitmap
 which returns an HBITMAP, select it into an HDC, and draw
 the pixels from the wxImage to the HDC one by one with SetPixel.
-This is now implemented, but without any mask handling, which will
-be needed.
-
-Unfortunately, there's a crash in malloc, within DeleteObject, when
-passed a bitmap created by CreateCompatibleBitmap, but only after a few
-deletions. This has yet to be tracked down, maybe by trying to create/delete
-some wxBitmaps from XPMs, from within e.g. the minimal sample.
+This is now implemented, but there are problems with masks.
+(a) masks have to be created at screen depth because BitBlt/GrDraw
+can't cope with differing depths, and (b) masked blitting
+is still not working (try enabling mask creation in
+wxBitmap::CreateFromImage by setting USE_MASKS to 1).
 
 
 Other missing features