How to Ensure My Bitmap Can Load from Resource

Question

How to Ensure My Bitmap Can Load from Resource

JWG 146

Locating a resource file fails. I don't know the reason.

Is this correct?

project.rc

// Bitmap

IN_BITMAP BITMAP DISCARDABLE "input.bmp"

resource.h

#define IN_BITMAP 201

project.cpp

PCWSTR inputBitmapName = L"IN_BITMAP";
PCWSTR inputBitmapType = L"BITMAP";
PCWSTR inputBitmapFile = L"input.bmp";

// Loading Resource Bitmap
	/* Locate the resource */
	imageResHandle = FindResourceW(HINST_THISCOMPONENT, resourceName, resourceType);
	hr = imageResHandle ? S_OK : E_FAIL;
	if (SUCCEEDED(hr))
	{
		//FAILED
	}

debug console :

		hr	E_FAIL	HRESULT
+		imageResHandle	0x0000000000000000 <NULL>	HRSRC__ *
+		resourceName	0x00007ff6d979acc0 L"IN_BITMAP"	const wchar_t *
+		resourceType	0x00007ff6d979acd8 L"BITMAP"	const wchar_t *

		hr	E_FAIL	HRESULT

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Answer 1

RLWA32 49,536

There are a number of reasons why the call to FindResourceW can fail.

The first thing to do is to call GetLastError() when the call fails. Tell us what error code was returned.

If the resource.h file contains a #define statement for IN_BITMAP then passing L"IN_BITMAP" is an error. Instead, pass MAKEINTRESOURCE(IN_BITMAP).

Instead of passing L"BITMAP" as the resource type pass RT_BITMAP.

If the resource resides in an .exe file's resources you can pass NULL as the module handle. If it resides in a DLL then you need to pass the HMODULE for that DLL to the function.

The DISCARDABLE bitmap attribute is obsolete and can be removed.

There's not enough information provided in your question to identify the actual error.

Finally, the code should use LoadImageW or LoadBitmapW if it will actually load a bitmap. Its not clear what purpose is served by calling FindResourceW since obtaining an HRSRC handle does not make that resource immediately available for use.

JWG 146 Reputation points

2023-05-21T23:22:43.5733333+00:00
Thanks very much for that.

The error was

GetProcessId failed with error 1813: The specific resource type cannot be found in the image file.

Using

PCWSTR inputBitmapName = MAKEINTRESOURCE(IN_BITMAP);

PCWSTR inputBitmapType = MAKEINTRESOURCE(RT_BITMAP);

Succeeded.

Finally, the code should use LoadImageW or LoadBitmapW if it will actually load a bitmap. Its not clear what purpose is served by calling FindResourceW since obtaining an HRSRC handle does not make that resource immediately available for use.

Perhaps you can help me with this.

Do I need to use LoadImage, or LoadBitmap, when using this code How to Load a Bitmap from a Resource?

Every step succeeded, until it got to...

/* Create a decoder for the stream */ hr = pIWICFactory->CreateDecoderFromStream( pStream, NULL, WICDecodeMetadataCacheOnLoad, &pDecoder );

This fails with the error

GetProcessId failed with error 127: The specified procedure could not be found.

Can you help with this?

Thanks.
RLWA32 49,536 Reputation points

2023-05-22T01:07:50.5433333+00:00

LoadImage and LoadBitmap are not relevant to the code in https://learn.microsoft.com/en-us/windows/win32/direct2d/how-to-load-a-bitmap-from-a-resource

I'm guessing that you are working with the Direct2D SimpleDirect2dApplication sample code. I was able to build this sample successfully. I suggest you ask a new question and provide the relevant details about the code used and the specific problems encountered. The IWICImagingFactory::CreateDecoderFromStream method returns an HRESULT error code on failure. GetLastError() is not used here.
JWG 146 Reputation points

2023-05-22T01:31:01.0366667+00:00

Yes, I'm building on the Direct2D Simple Application

I figured getting an answer here was appropriate, sine the question is "How to Ensure My Bitmap Can Load from Resource".

I hit the accept button, and realized the question wasn't really answered. Just the initial problem.

However, I left it, as answered. Should I undo it?

I'm really trying to get this code to work.
RLWA32 49,536 Reputation points

2023-05-22T07:10:49.75+00:00

The question that you asked about the Windows API FindResourceW function was correctly answered. In subsequently posted comments you redirected to Direct2D code which is a different topic. That is why you should ask a new question to address the different problem.
JWG 146 Reputation points

2023-05-22T13:19:45.4633333+00:00

I got my answer, here.

Just store your bitmap resource in an actual image file format - like PNG or JPG - and it will work. If you store your bitmap resource as raw bitmap data, you don't need to decode it. In that case, just copy the data straight into the target texture...

That's great, since I didn't want to use bitmap files which are so large in size, anyway.

This works... and answers the question.

PNG_IMAGE IMAGE "image.png"

PCWSTR inputPngName = MAKEINTRESOURCE(PNG_IMAGE);

PCWSTR inputPngType = L"IMAGE";

Thanks for your response.

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