L_SetPaintContrast
#include "l_bitmap.h"
L_INT EXT_FUNCTION L_SetPaintContrast(pBitmap, nValue)
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pBITMAPHANDLE pBitmap; |
/* pointer to the bitmap handle */ |
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L_INT nValue; |
/* amount of contrast change */ |
Sets the contrast value for the specified bitmap. This value can be retrieved using the L_GetPaintContrast function.
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Parameter |
Description |
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pBitmap |
Pointer to the bitmap handle that references the bitmap to be affected. This cannot be NULL. |
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nValue |
Amount of contrast change. Valid values are -1000 to +1000. |
Returns
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SUCCESS |
The function was successful. |
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< 1 |
An error occurred. Refer to Return Codes. |
Comments
When applying contrast, gamma, and intensity changes to a bitmap, LEAD applies the changes in the following order:
Contrast
Intensity
Gamma
Required DLLs and Libraries
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LTDIS For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Platforms
Windows 95 / 98 / Me, Windows 2000 / XP, Windows CE.
See Also
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Functions: |
L_GetPaintContrast, L_GetPaintGamma, L_SetPaintGamma, L_GetPaintIntensity, L_SetPaintIntensity |
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Topics: |
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Example
/* This example sets the increases the current paint settings */
/* by 100 and then forces a repaint */
L_INT nContrast;
L_UINT uGamma;
L_INT nIntensity;
BITMAPHANDLE LeadBitmap; /* you must load the bitmap before using the following code */
/* Get the values */
nContrast = L_GetPaintContrast (&LeadBitmap);
uGamma = L_GetPaintGamma (&LeadBitmap);
nIntensity = L_GetPaintIntensity (&LeadBitmap);
/* Set the new values */
L_SetPaintContrast (&LeadBitmap, nContrast + 100);
L_SetPaintGamma (&LeadBitmap, uGamma + 100);
L_SetPaintIntensity (&LeadBitmap, nIntensity + 100);