Divides the bitmap into rectangular cells and makes it look as if it is being viewed through glass blocks.
#include "l_bitmap.h"
L_LTIMGSFX_API L_INT L_GlassEffectBitmap(pBitmap, uCellWidth, uCellHeight, uFlags)
Pointer to the bitmap handle referencing the bitmap to be changed.
Value that represents the width of a cell in pixels or the number of cells present across the width of the bitmap, based on the flags set in uFlags
. The valid range is between 2 and half the bitmap width.
Value that represents the height of a cell in pixels or the number of cells present across the height of the bitmap, based on the flags set in uFlags
. The valid range is between 2 and half the bitmap height.
Flags that indicate what type of data is in the uCellWidth
and uCellHeight
parameters. You can use a bitwise OR ( | ) to specify one flag from each group.
Value | Meaning |
---|---|
GLASS_WFRQ | [0x0001] The parameter uCellWidth is the number of cells along the width of the bitmap. |
GLASS_WPER | [0x0002] The parameter uCellWidth is the width of the cell in pixels. |
Value | Meaning |
---|---|
GLASS_HFRQ | [0x0010] The parameter uCellHeight is the number of cells along the height of the bitmap. |
GLASS_HPER | [0x0020] The parameter uCellWidth is the height of the cell in pixels. |
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.
If the bitmap has a region, the effect will be applied on the region only.
This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available in the Document and Medical Imaging toolkits.
To update a status bar or detect a user interrupt during execution of this function, refer to L_SetStatusCallback.
This function does not support 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.
Glass Effect Function - Before
Glass Effect Function - After
View additional platform support for this Glass Effect function.
Win32, x64.
The following example loads a bitmap and applies a glass effect to it:
L_INT GlassEffectBitmapExample(L_VOID)
{
L_INT nRet;
BITMAPHANDLE LeadBitmap; /* Bitmap handle to hold the loaded image. */
/* Load the bitmap, keeping the bits per pixel of the file */
nRet = L_LoadBitmap(MAKE_IMAGE_PATH(TEXT("Image1.cmp")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
if (nRet != SUCCESS)
return nRet;
/* apply glass effect */
nRet = L_GlassEffectBitmap(&LeadBitmap, 20, 10, GLASS_WFRQ | GLASS_HPER);
if (nRet != SUCCESS)
return nRet;
nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL);
if (nRet != SUCCESS)
return nRet;
//free bitmap
if (LeadBitmap.Flags.Allocated)
L_FreeBitmap(&LeadBitmap);
return SUCCESS;
}
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