digitalmars.D.learn - Recipe and best practice for accessing COM
- newToCOM (10/10) Jul 24 2012 I am trying to use COM to access Windows functionality and APIs.
- newToCOM (2/2) Jul 24 2012 http://forum.dlang.org/thread/fj617q$15qk$1@digitalmars.com
- Sean Cavanaugh (9/19) Jul 25 2012 I made D bindings for d3d11, directwrite, d2d1, and a few other directx
- newToCOM (45/45) Sep 02 2012 Thanks for your replies!
- Kagamin (1/1) Sep 03 2012 The diagnostic message can definitely be better.
- newToCOM (63/63) Sep 09 2012 Still struggling..
- Sean Cavanaugh (22/77) Sep 09 2012 In this example the pID2D1Factory is a void*, so it will need a cast to
- Sean Cavanaugh (7/10) Sep 09 2012 I also have a D version of something resembling ATL's CComPtr which I am...
- newToCOM (1/7) Sep 09 2012 That would be great!
- newToCOM (1/24) Sep 09 2012 Thanks a lot! That solved my issue.
- Jesse Phillips (8/20) Jul 25 2012 I can't give you much guidance on a step by step type
I am trying to use COM to access Windows functionality and APIs. I have read the interface documentation and some documentation at MSDN. I have seen the included sample snippet for IHello and the slides "Modern COM programming in D", but it is still not clear exactly what to do and what the best practice is. So, my question is: I have downloaded Windows SDK and coffimplib. How do I proceed to access d2d1 and draw a rectangle? A stepwise description of the recommended procedure is highly appreciated!
Jul 24 2012
"newToCOM" <new to.COM> http://forum.dlang.org/thread/fj617q$15qk$1 digitalmars.com Found this, which may help.
Jul 24 2012
On 7/24/2012 2:01 PM, newToCOM wrote:I am trying to use COM to access Windows functionality and APIs. I have read the interface documentation and some documentation at MSDN. I have seen the included sample snippet for IHello and the slides "Modern COM programming in D", but it is still not clear exactly what to do and what the best practice is. So, my question is: I have downloaded Windows SDK and coffimplib. How do I proceed to access d2d1 and draw a rectangle? A stepwise description of the recommended procedure is highly appreciated!I made D bindings for d3d11, directwrite, d2d1, and a few other directx APis. They are located at: http://www.dsource.org/projects/bindings/wiki/DirectX The bindings haven't had extensive testing but the bits i've used seem to work correctly (mostly in d3d11) The WindowsApi project is also necessary: http://www.dsource.org/projects/bindings/wiki/WindowsApi
Jul 25 2012
Thanks for your replies!
I'm trying to accomplish this:
http://msdn.microsoft.com/en-us/library/windows/apps/dd535473.aspx
Using win32 and directx.d2d1, I got this far:
---
...
int WinMain( ... ) { ... }
int myWinMain( ... ) { ... }
LRESULT WndProc ( ... )
{
...
case WM_CREATE:
D2D1_FACTORY_OPTIONS factoryOptions;
factoryOptions.debugLevel =
D2D1_DEBUG_LEVEL.INFORMATION;
const D2D1_FACTORY_OPTIONS* pfactoryOptions =
&factoryOptions;
const IID factory = IID_ID2D1Factory;
void* ppIFactory;
HRESULT hr = D2D1CreateFactory(
D2D1_FACTORY_TYPE.SINGLE_THREADED,
&factory,
pfactoryOptions,
ppIFactory
);
...
}
---
I get the following error messages:
- 1 -
function win32.directx.d2d1.D2D1CreateFactory (
D2D1_FACTORY_TYPE factoryType,
const(GUID)* riid,
const(D2D1_FACTORY_OPTIONS*) pFactoryOptions,
out void* ppIFactory)
is not callable using argument types (
D2D1_FACTORY_TYPE,
const(GUID)*,
const(D2D1_FACTORY_OPTIONS*),
void*)
- 2 -
cannot implicitly convert expression (& factory)
of type const(GUID)* to const(GUID)*
How should this be done correctly?
How is a rectangle finally drawn?
Sep 02 2012
On Monday, 3 September 2012 at 09:10:49 UTC, Kagamin wrote:The diagnostic message can definitely be better.Any idea what's causing the error messages? Why aren't the types matching?
Sep 04 2012
If you have a reduced test case, you can file a diagnostic bug.
Sep 07 2012
Still struggling..
test.d:
-----------------------------------
( ... ) /* Other imports */
import win32.directx.d2d1;
alias win32.directx.d2d1.IID IID;
IID IID_ID2D1Factory = { 0x06152247, 0x6F50, 0x465A, [0x92, 0x45,
0x11, 0x8B, 0xFD, 0x3B, 0x60, 0x07] };
extern (Windows)
int WinMain( ... )
{
( ... ) /* Boilerplate code */
}
int myWinMain( ... )
{
( ... ) /* Register class, Create window, show window,
message loop */
}
LRESULT WndProc( ... )
{
switch (message)
{
( ... ) /* Default and case WM_DESTROY */
case WM_CREATE:
// arg2
REFIID pIID_ID2D1Factory;
pIID_ID2D1Factory = cast(REFIID)&IID_ID2D1Factory;
// arg3
D2D1_FACTORY_OPTIONS factoryOptions;
factoryOptions.debugLevel =
D2D1_DEBUG_LEVEL.INFORMATION;
const D2D1_FACTORY_OPTIONS* pfactoryOptions =
&factoryOptions;
// arg4
void* pID2D1Factory;
HRESULT hr = D2D1CreateFactory(
D2D1_FACTORY_TYPE.SINGLE_THREADED,
pIID_ID2D1Factory,
pfactoryOptions,
pID2D1Factory
);
writeln(hr); // Prints 0
writeln(pID2D1Factory); // Prints a non-null
pointer
// Trying to use the interface
float dpiX, dpiY;
pID2D1Factory.GetDesktopDpi(dpiX, dpiY);
// !!! Error: undefined identifier 'GetDesktopDpi'
// I thought I had a pointer to the interface and
could call
// its methods...
return 0;
------------------------------
* Coffimplib was used to convert the d2d1.lib from Microsoft
DirectX SDK (June 2010). The converted d2d1.dll was placed in
C:\dcode\dlls
* With test.d in C:\dcode, the file was compiled and linked in
C:\dcode with:
dmd test.d %cd%\dlls\d2d1.lib -I%cd%\dlls\
-version=DXSDK_JUNE_2010
- Why is the method identifier undefined?
- Are there any code examples showing the right use of the
bindings?
Sep 09 2012
On 9/9/2012 7:30 AM, newToCOM wrote:
Still struggling..
test.d:
-----------------------------------
( ... ) /* Other imports */
import win32.directx.d2d1;
alias win32.directx.d2d1.IID IID;
IID IID_ID2D1Factory = { 0x06152247, 0x6F50, 0x465A, [0x92, 0x45, 0x11,
0x8B, 0xFD, 0x3B, 0x60, 0x07] };
extern (Windows)
int WinMain( ... )
{
( ... ) /* Boilerplate code */
}
int myWinMain( ... )
{
( ... ) /* Register class, Create window, show window, message loop */
}
LRESULT WndProc( ... )
{
switch (message)
{
( ... ) /* Default and case WM_DESTROY */
case WM_CREATE:
// arg2
REFIID pIID_ID2D1Factory;
pIID_ID2D1Factory = cast(REFIID)&IID_ID2D1Factory;
// arg3
D2D1_FACTORY_OPTIONS factoryOptions;
factoryOptions.debugLevel = D2D1_DEBUG_LEVEL.INFORMATION;
const D2D1_FACTORY_OPTIONS* pfactoryOptions = &factoryOptions;
// arg4
void* pID2D1Factory;
HRESULT hr = D2D1CreateFactory(
D2D1_FACTORY_TYPE.SINGLE_THREADED,
pIID_ID2D1Factory,
pfactoryOptions,
pID2D1Factory
);
writeln(hr); // Prints 0
writeln(pID2D1Factory); // Prints a non-null pointer
// Trying to use the interface
float dpiX, dpiY;
pID2D1Factory.GetDesktopDpi(dpiX, dpiY);
// !!! Error: undefined identifier 'GetDesktopDpi'
// I thought I had a pointer to the interface and could call
// its methods...
return 0;
------------------------------
* Coffimplib was used to convert the d2d1.lib from Microsoft DirectX SDK
(June 2010). The converted d2d1.dll was placed in C:\dcode\dlls
* With test.d in C:\dcode, the file was compiled and linked in C:\dcode
with:
dmd test.d %cd%\dlls\d2d1.lib -I%cd%\dlls\ -version=DXSDK_JUNE_2010
- Why is the method identifier undefined?
- Are there any code examples showing the right use of the bindings?
In this example the pID2D1Factory is a void*, so it will need a cast to
the proper type with a cast(ID2D1Factory) soemtime after the create call;
Since this particular API takes an out void* (since it is capable of
creating multiple unrelated types), it would need to look something like
this:
HRESULT hr = D2D1CreateFactory(
D2D1_FACTORY_TYPE.SINGLE_THREADED,
pIID_ID2D1Factory,
pfactoryOptions,
pID2D1Factory);
if (SUCCEEDED(hr))
{
assert(pID2D1Factory !is null);
ID2D1Factory factory = cast(ID2D1Factory)pID2D1Factory;
factory.GetDesktopDpi(dpiX, dpiY);
}
I've been super busy at work so haven't had much time to respond to this
thread.
Technically the API's fourth argument could be rewritten to be an 'out
IUnknown', but then you are stuck calling QueryInterface, and back to
having the exact same problem with the QueryInterface method.
Sep 09 2012
On 9/9/2012 7:57 AM, Sean Cavanaugh wrote:On 9/9/2012 7:30 AM, newToCOM wrote: I've been super busy at work so haven't had much time to respond to this thread.I also have a D version of something resembling ATL's CComPtr which I am finally happy enough with to share, that I could post when i get home later tonight. The class is a good argument for keeping the rather esoteric opDot operator, since alias this is extremely dangerous for smart pointer structs in D.
Sep 09 2012
I also have a D version of something resembling ATL's CComPtr which I am finally happy enough with to share, that I could post when i get home later tonight. The class is a good argument for keeping the rather esoteric opDot operator, since alias this is extremely dangerous for smart pointer structs in D.That would be great!
Sep 09 2012
In this example the pID2D1Factory is a void*, so it will need a
cast to the proper type with a cast(ID2D1Factory) soemtime
after the create call;
Since this particular API takes an out void* (since it is
capable of creating multiple unrelated types), it would need to
look something like this:
HRESULT hr = D2D1CreateFactory(
D2D1_FACTORY_TYPE.SINGLE_THREADED,
pIID_ID2D1Factory,
pfactoryOptions,
pID2D1Factory);
if (SUCCEEDED(hr))
{
assert(pID2D1Factory !is null);
ID2D1Factory factory = cast(ID2D1Factory)pID2D1Factory;
factory.GetDesktopDpi(dpiX, dpiY);
}
I've been super busy at work so haven't had much time to
respond to this thread.
Technically the API's fourth argument could be rewritten to be
an 'out IUnknown', but then you are stuck calling
QueryInterface, and back to having the exact same problem with
the QueryInterface method.
Thanks a lot! That solved my issue.
Sep 09 2012
On Tuesday, 24 July 2012 at 19:01:15 UTC, newToCOM wrote:I am trying to use COM to access Windows functionality and APIs. I have read the interface documentation and some documentation at MSDN. I have seen the included sample snippet for IHello and the slides "Modern COM programming in D", but it is still not clear exactly what to do and what the best practice is. So, my question is: I have downloaded Windows SDK and coffimplib. How do I proceed to access d2d1 and draw a rectangle? A stepwise description of the recommended procedure is highly appreciated!I can't give you much guidance on a step by step type instructions. Haven't done much COM myself. The DX bindings mentioned sound better for what you are asking. For "Modern COM" Juno, and the updated tlbimpd is updated for D2 on https://github.com/JesseKPhillips/Juno-Windows-Class-Library Hope that helps.
Jul 25 2012