Module Description

Additional gradient painting APIs...

Macros
#define	VTX_OPAQUE 0x00

#define	VTX_TRANSPARENT 0xFF

#define	GRADIENT_H GRADIENT_FILL_RECT_H

#define	GRADIENT_V GRADIENT_FILL_RECT_V

#define	GRADIENT_D (GRADIENT_FILL_TRIANGLE+1)

Functions
void WINAPI	SetTriVertex (PTRIVERTEX pVtx, int x, int y, COLORREF cr, BYTE Alpha=0x00)

void WINAPI	SetTriMesh (PGRADIENT_TRIANGLE pTri, UINT Vtx1, UINT Vtx2, UINT Vtx3)

void WINAPI	SetRectMesh (PGRADIENT_RECT pRect, UINT TopLeft, UINT BotRight)

void WINAPI	DrawGradientRect (HDC hdc, PRECT pr, COLORREF c1, COLORREF c2, UINT type)

Macro Definition Documentation

◆ VTX_OPAQUE

#define VTX_OPAQUE 0x00

SetTriVertex() alpha: Fully opaque.

Definition at line 2065 of file UtilFunc.h.

◆ VTX_TRANSPARENT

#define VTX_TRANSPARENT 0xFF

SetTriVertex() alpha: Fully transparent.

Definition at line 2066 of file UtilFunc.h.

◆ GRADIENT_H

#define GRADIENT_H GRADIENT_FILL_RECT_H

Horizontal DrawGradientRect().

Definition at line 2097 of file UtilFunc.h.

◆ GRADIENT_V

#define GRADIENT_V GRADIENT_FILL_RECT_V

Vertical DrawGradientRect().

Definition at line 2098 of file UtilFunc.h.

◆ GRADIENT_D

#define GRADIENT_D (GRADIENT_FILL_TRIANGLE+1)

Top/left to bottom/right diagonal DrawGradientRect().

Definition at line 2099 of file UtilFunc.h.

Function Documentation

◆ SetTriVertex()

void WINAPI SetTriVertex	(	PTRIVERTEX	pVtx,
		int	x,
		int	y,
		COLORREF	cr,
		BYTE	Alpha = `0x00`
	)

SetTriVertex fills in a TRIVERTEX struct.

Though we could, concievably, use the high byte of COLORREF as an alpha value,
that byte is sometimes used for other purposes, so we pass a separate alpha value
for the vertex definition.

See also VTX_OPAQUE, VTX_TRANSPARENT, and [MSDN] TRIVERTEX.

Definition at line 478 of file GdiUtil.cpp.

◆ SetTriMesh()

void WINAPI SetTriMesh	(	PGRADIENT_TRIANGLE	pTri,
		UINT	Vtx1,
		UINT	Vtx2,
		UINT	Vtx3
	)

SetTriMesh fills in a GRADIENT_TRIANGLE struct.

Definition at line 487 of file GdiUtil.cpp.

◆ SetRectMesh()

void WINAPI SetRectMesh	(	PGRADIENT_RECT	pRect,
		UINT	TopLeft,
		UINT	BotRight
	)

SetRectMesh fills in a GRADIENT_RECT struct.

Definition at line 494 of file GdiUtil.cpp.

◆ DrawGradientRect()

void WINAPI DrawGradientRect	(	HDC	hdc,
		PRECT	pr,
		COLORREF	c1,
		COLORREF	c2,
		UINT	type
	)

DrawGradientRect draws a gradient filled rectangle.
The gradient can be horizontal, vertical, or diagonal.

Parameters

hdc	Display context.
pr	The rectangle to fill.
c1,c2	Starting and ending color.
type	Gradient direction, one of: GRADIENT_H, GRADIENT_V, or GRADIENT_D

Definition at line 435 of file GdiUtil.cpp.