Load PNG/JPEG from resource using GDI+ (MASM)
Following my previous post on how to load JPG/PNG file
from resource using GDI+:
http://devpinoy.org/blogs/cvega/archive/2008/07/28/loading-png-and-jpg-image-from-resource-using-gdi.aspx
I’ve written an equivalent function for
MASM32 users:
http://www.masm32.com/board/index.php?topic=10191.0
Just follow these simple steps and you’re set to use
resource image in your program in no time.
gdiplusLoadBitmapFromResource,
hInstance,
resourceName,
resourceType,
outImage
where:
hInstance - the module handle
where to load the resource
resourceName - the name or the ID of the
resource
resourceType - string pointer that will
indicate the type
of the resource.,
e.g., "PNG",0
outImage - address of
variable where to put the handle
of loaded image
Here's how to use it:
1. Add the function gdiplusLoadBitmapFromResource to your program, or
include gdiplusLoadBitmapFromResource.inc.
2. Add the proto (so you can use INVOKE to call
gdiplusLoadBitmapFromResource):
gdiplusLoadBitmapFromResource proto :HMODULE,
:LPSTR, :LPSTR, :DWORD
3. Initialize GDI+ on your program's start
GdiplusStartupInput struc
GdiplusVersion dd ?
DebugEventCallback dd ?
SuppressBackgroundThread BOOL ?
SuppressExternalCodecs BOOL ?
GdiplusStartupInput ends
.data
gdiplusToken dd ?
gdiplusSInput GdiplusStartupInput
<1, NULL, FALSE, FALSE>
.code
invoke GetModuleHandle, 0
mov hInstance, eax
; Initialize GDI+
invoke GdiplusStartup, addr
gdiplusToken, addr gdiplusSInput, NULL
4. In your resource script, add your image with specified type,
something like:
9000 PNG "myImage.png"
where 9000 is the ID of the resource, and PNG is the type
5. Add a null-terminated string entry to your data section for the type
of resource, e.g., "PNG"
.data
pngImage dd NULL
pngType db "PNG", 0
6. Load the image using gdiplusLoadBitmapFromResource:
invoke gdiplusLoadBitmapFromResource,
hInstance, 9000, addr pngType, addr pngImage
7. When you're done using the image, dispose it using GdipDisposeImage
function:
invoke GdipDisposeImage, addr pngImage
8. Finally, shutdown GDI+ before you exit your program:
invoke GdiplusShutdown, gdiplusToken
Hope you find this little code useful.
Cheers,
-chris