GreDeviceResizePalette: Difference between revisions
Created page with "GreDeviceResizePalette changes the size of a logical palette. If the size is reduced, the removed entries are deleted. If the size is increased, the new entries are set to Bla..." |
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GreDeviceResizePalette changes the size of a logical palette. If the size is reduced, the removed entries are deleted. If the size is increased, the new entries are set to Black. | GreDeviceResizePalette changes the size of a logical palette. If the size is reduced, the removed entries are deleted. If the size is increased, the new entries are set to Black. | ||
This function can be hooked by the presentation driver. | This function can be hooked by the presentation driver. | ||
;Simulation support: This function is simulated by a handling routine in Revision 2.0 (or higher) of the graphics engine. | ;Simulation support: This function is simulated by a handling routine in Revision 2.0 (or higher) of the graphics engine. | ||
== Syntax == | == Syntax == | ||
GreDeviceResizePalette(hdc, hdevpal, ulSize, pInstance, lFunction) | GreDeviceResizePalette(hdc, hdevpal, ulSize, pInstance, lFunction) | ||
== Parameters == | == Parameters == | ||
;hdc (HDC) - input | ;hdc (HDC) - input:Device context handle. | ||
:Device context handle. | ;hdevpal (ULONG) - input:Device palette handle. | ||
;ulSize (ULONG) - input:New palette size. | |||
;hdevpal (ULONG) - input | ;pInstance (PVOID) - input:Pointer to instance data. | ||
:Device palette handle. | ;lFunction (ULONG) - input:High-order WORD=flags; low-order WORD=NGreDeviceResizePalette. | ||
;ulSize (ULONG) - input | |||
:New palette size. | |||
;pInstance (PVOID) - input | |||
:Pointer to instance data. | |||
;lFunction (ULONG) - input | |||
:High-order WORD=flags; low-order WORD=NGreDeviceResizePalette. | |||
== Returns == | == Returns == | ||
;rc (LONG) - returns | ;rc (LONG) - returns:Return codes. | ||
:Return codes. | :On completion, this function returns the following values: | ||
:*Error (0) | |||
:On completion, this function returns the following values: | :*Successful (1) | ||
:*Error (0) | |||
:*Successful (1) | |||
== Sample == | == Sample == | ||
<pre> | <pre> | ||
#define INCL_GRE_PALETTE | #define INCL_GRE_PALETTE | ||
#include <os2.h> | #include <os2.h> | ||
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LONG rc; /* Return codes. */ | LONG rc; /* Return codes. */ | ||
rc = GreDeviceResizePalette(hdc, hdevpal, | rc = GreDeviceResizePalette(hdc, hdevpal, ulSize, pInstance, lFunction); | ||
</pre> | </pre> | ||
[[Category:Gre]] | [[Category:Gre]] | ||
Latest revision as of 00:08, 24 March 2020
GreDeviceResizePalette changes the size of a logical palette. If the size is reduced, the removed entries are deleted. If the size is increased, the new entries are set to Black.
This function can be hooked by the presentation driver.
- Simulation support
- This function is simulated by a handling routine in Revision 2.0 (or higher) of the graphics engine.
Syntax
GreDeviceResizePalette(hdc, hdevpal, ulSize, pInstance, lFunction)
Parameters
- hdc (HDC) - input
- Device context handle.
- hdevpal (ULONG) - input
- Device palette handle.
- ulSize (ULONG) - input
- New palette size.
- pInstance (PVOID) - input
- Pointer to instance data.
- lFunction (ULONG) - input
- High-order WORD=flags; low-order WORD=NGreDeviceResizePalette.
Returns
- rc (LONG) - returns
- Return codes.
- On completion, this function returns the following values:
- Error (0)
- Successful (1)
Sample
#define INCL_GRE_PALETTE #include <os2.h> HDC hdc; /* Device context handle. */ ULONG hdevpal; /* Device palette handle. */ ULONG ulSize; /* New palette size. */ PVOID pInstance; /* Pointer to instance data. */ ULONG lFunction; /* High-order WORD=flags; low-order WORD=NGreDeviceResizePalette. */ LONG rc; /* Return codes. */ rc = GreDeviceResizePalette(hdc, hdevpal, ulSize, pInstance, lFunction);