Re: Windows GTK+ 2.24.10: Cairo contexts not rendering to surface

Jeffrey Sheen <jeffrey.sheen00@xxxxxxxxxxxxxxxxxxxxx> · Wed, 1 Feb 2017 17:38:02 +0000

N.B. I have removed the original Stack Overflow question, and created a new question with this new information:
http://stackoverflow.com/questions/41986105/idirect3d9createdevice-prevents-gtk-2-cairo-rendering

On 1 February 2017 at 17:10, Jeffrey Sheen <jeffrey.sheen00@xxxxxxxxxxxxxxxxxxxxx> wrote:
After trying different VS 2015 Solution configurations (and abundant breakpointing), I have established that it is not the .EXE->.LIB->Cairo API call structure that is breaking Cairo surface rendering in my project.

The black test square can be rendered before, but not directly after, this D3D9 API call:

Direct3DCreate9(D3D_SDK_VERSION)->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, WindowHandle, D3DCREATE_HARDWARE_VERTEXPROCESSING, &PresentParameters, &PDevice);

N.B. The object parameters are as follows:
WindowHandle	0x001b07f8 {unused=13111204 }	HWND__ *
		unused	13111204	int

PresentParameters	{BackBufferWidth=0 BackBufferHeight=0 BackBufferFormat=D3DFMT_UNKNOWN (0) ...}	_D3DPRESENT_PARAMETERS_
		BackBufferWidth	0	unsigned int
		BackBufferHeight	0	unsigned int
		BackBufferFormat	D3DFMT_UNKNOWN (0)	_D3DFORMAT
		BackBufferCount	1	unsigned int
		MultiSampleType	D3DMULTISAMPLE_NONE (0)	_D3DMULTISAMPLE_TYPE
		MultiSampleQuality	0	unsigned long
		SwapEffect	D3DSWAPEFFECT_DISCARD (1)	_D3DSWAPEFFECT
+		hDeviceWindow	0x001b07f8 {unused=13111204 }	HWND__ *
		Windowed	1	int
		EnableAutoDepthStencil	0	int
		AutoDepthStencilFormat	D3DFMT_UNKNOWN (0)	_D3DFORMAT
		Flags	1	unsigned long
		FullScreen_RefreshRateInHz	0	unsigned int
		PresentationInterval	0	unsigned int

PDevice	0x00000000 <NULL>	IDirect3DDevice9 *
+		IUnknown	<struct at NULL>	IUnknown

As a reminder, the code for rendering the black test square is as below, and the status of each Cairo API call returns "no error has occurred":

cairo_surface_t *surface;
	cairo_t *cr;
	cairo_status_t status;

	surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 390, 60);
	status = cairo_surface_status(surface);

	cr = cairo_create(surface);
	status = cairo_status(cr);

	cairo_set_source_rgba(cr, 0, 0, 0, 1);
	status = cairo_status(cr);

	cairo_rectangle(cr, 175, 10, 40, 40);
	status = cairo_status(cr);

	cairo_fill(cr);
	status = cairo_status(cr);

	cairo_surface_flush(surface);
	status = cairo_surface_write_to_png(surface, "f:\\cairo_test_pos_lib_member_function.png");

	cairo_destroy(cr);
	cairo_surface_destroy(surface);

Can anyone suggest how to proceed from here?

Cheers,

Jeff.

On 27 January 2017 at 11:07, Jeffrey Sheen <jeffrey.sheen00@alumni.imperial.ac.uk> wrote:
Thanks for taking a look Eric.
The status value after all of the Cairo API calls are all "no error has occurred", in both the EXE implementation and LIB implementation, so no information there.

I noticed this output during the execution of the EXE:

'Loaded 'F:\filestore\development\gtk+\gtk+-bundle_2.24.10-20120208_win32\bin\libcairo-2.dll'. Module was built without symbols.
'Loaded 'F:\filestore\development\gtk+\gtk+-bundle_2.24.10-20120208_win32\bin\libfontconfig-1.dll'. Module was built without symbols.
'Loaded 'F:\filestore\development\gtk+\gtk+-bundle_2.24.10-20120208_win32\bin\libexpat-1.dll'. Module was built without symbols.
'Loaded 'F:\filestore\development\gtk+\gtk+-bundle_2.24.10-20120208_win32\bin\freetype6.dll'. Module was built without symbols.
'Loaded 'F:\filestore\development\gtk+\gtk+-bundle_2.24.10-20120208_win32\bin\libpng14-14.dll'. Module was built without symbols.
'Loaded 'F:\filestore\development\gtk+\gtk+-bundle_2.24.10-20120208_win32\bin\zlib1.dll'. Module was built without symbols.

Only the GTK+ DLL files are reported as missing symbols, where others have theirs loaded. Is it possible that the dynamic linkage is broken for API calls made from the static LIB because of this?

On 26 January 2017 at 18:47,  <cecashon@xxxxxxx> wrote:

 Hi Jeffrey,

I am probably not much help here. Your code works on Ubuntu16.04 and GTK2.24.30. It does seem strange that there isn't an error popping up someplace. Have you tried getting the status of that function to see if it returns an error?

    cairo_status_t status;

    status=cairo_surface_write_to_png(surface, test_dir);

    g_print("%s\n", cairo_status_to_string(status));

Maybe it might offer a clue to what is going on.

Eric

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