how to get HDC of a Gdiplus::Bitmap which has the same size of Gdiplus::Bitmap
I used following code to create Bitmap and its HDC, but found that they don't have the same size.
Bitmap memBitmap(4961, 7016);
Graphics memGraphics(&memBitmap);
HDC memHDC = memGraphics.getHDC();
int iTmp1 = GetDeviceCaps(memHDC, HORZRES);
int iTmp2 = GetDeviceCaps(memHDC, VERTRES);
//doSomething...
memGraphics.ReleaseHDC(memHDC);
iTmp1 and iTmp2 are screen current size, such as 1600x900.
How to MAKE memHDC's size to 4961x7016?
Thanks a lot.
c++ gdi+
asked Nov 13 '18 at 7:24
Nonskill_CATNonskill_CAT
11
add a comment |
I used following code to create Bitmap and its HDC, but found that they don't have the same size.
Bitmap memBitmap(4961, 7016);
Graphics memGraphics(&memBitmap);
HDC memHDC = memGraphics.getHDC();
int iTmp1 = GetDeviceCaps(memHDC, HORZRES);
int iTmp2 = GetDeviceCaps(memHDC, VERTRES);
//doSomething...
memGraphics.ReleaseHDC(memHDC);
iTmp1 and iTmp2 are screen current size, such as 1600x900.
How to MAKE memHDC's size to 4961x7016?
Thanks a lot.
c++ gdi+
asked Nov 13 '18 at 7:24
Nonskill_CATNonskill_CAT
11
Well, that is becauseGetDeviceCapswithHORZRESandVERTRESis supposed to return screen resolution... Device context don't have sizes, bitmaps do.
– VTT
Nov 13 '18 at 7:27
add a comment |
I used following code to create Bitmap and its HDC, but found that they don't have the same size.
Bitmap memBitmap(4961, 7016);
Graphics memGraphics(&memBitmap);
HDC memHDC = memGraphics.getHDC();
int iTmp1 = GetDeviceCaps(memHDC, HORZRES);
int iTmp2 = GetDeviceCaps(memHDC, VERTRES);
//doSomething...
memGraphics.ReleaseHDC(memHDC);
iTmp1 and iTmp2 are screen current size, such as 1600x900.
How to MAKE memHDC's size to 4961x7016?
Thanks a lot.
c++ gdi+
asked Nov 13 '18 at 7:24
Nonskill_CATNonskill_CAT
11
I used following code to create Bitmap and its HDC, but found that they don't have the same size.
Bitmap memBitmap(4961, 7016);
Graphics memGraphics(&memBitmap);
HDC memHDC = memGraphics.getHDC();
int iTmp1 = GetDeviceCaps(memHDC, HORZRES);
int iTmp2 = GetDeviceCaps(memHDC, VERTRES);
//doSomething...
memGraphics.ReleaseHDC(memHDC);
iTmp1 and iTmp2 are screen current size, such as 1600x900.
How to MAKE memHDC's size to 4961x7016?
Thanks a lot.
c++ gdi+
c++ gdi+
asked Nov 13 '18 at 7:24
Nonskill_CATNonskill_CAT
11
asked Nov 13 '18 at 7:24
Nonskill_CATNonskill_CAT
11
asked Nov 13 '18 at 7:24
Nonskill_CATNonskill_CAT
11
asked Nov 13 '18 at 7:24
Nonskill_CATNonskill_CAT
11
asked Nov 13 '18 at 7:24
Nonskill_CATNonskill_CAT
11
11
Well, that is becauseGetDeviceCapswithHORZRESandVERTRESis supposed to return screen resolution... Device context don't have sizes, bitmaps do.
– VTT
Nov 13 '18 at 7:27
add a comment |
Well, that is becauseGetDeviceCapswithHORZRESandVERTRESis supposed to return screen resolution... Device context don't have sizes, bitmaps do.
– VTT
Nov 13 '18 at 7:27
Well, that is because
GetDeviceCaps with HORZRES and VERTRES is supposed to return screen resolution... Device context don't have sizes, bitmaps do.– VTT
Nov 13 '18 at 7:27
Well, that is because
GetDeviceCaps with HORZRES and VERTRES is supposed to return screen resolution... Device context don't have sizes, bitmaps do.– VTT
Nov 13 '18 at 7:27
add a comment |
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Well, that is because
GetDeviceCapswithHORZRESandVERTRESis supposed to return screen resolution... Device context don't have sizes, bitmaps do.– VTT
Nov 13 '18 at 7:27