public GradientRect(int left, int top, int width, int height, Colorref startColor, Colorref endColor, GradientRectDirection style)
{
fRect = new RECT(left, top, width, height);
fVertices = new TRIVERTEX[2];
fGradientRect = new GRADIENT_RECT[1];
fGradientRect[0] = new GRADIENT_RECT();
SetVertices(left, top, width, height);
// Set Colors for left/top
fVertices[0].Red = startColor.Red16;
fVertices[0].Green = startColor.Green16;
fVertices[0].Blue = startColor.Blue16;
fVertices[0].Alpha = 0x0000;
// Set Colors for right/bottom
fVertices[1].Red = endColor.Red16;
fVertices[1].Green = endColor.Green16;
fVertices[1].Blue = endColor.Blue16;
fVertices[1].Alpha = 0x0000;
fGradientRect[0].UpperLeft = 0;
fGradientRect[0].LowerRight = 1;
fGradientDirection = style;
}
public GradientRect(int left, int top, int width, int height, uint startColor, uint endColor, GradientRectDirection style)
{
fRect = new RECT(left, top, width, height);
fVertices = new TRIVERTEX[2];
fGradientRect = new GRADIENT_RECT[1];
fGradientRect[0] = new GRADIENT_RECT();
SetVertices(left, top, width, height);
// Set Colors for left/top
fVertices[0].Red = (ushort)(RGBColor.R(startColor) << 8);
fVertices[0].Green = (ushort)(RGBColor.G(startColor) << 8);
fVertices[0].Blue = (ushort)(RGBColor.B(startColor) << 8);
fVertices[0].Alpha = 0x0000;
// Set Colors for right/bottom
fVertices[1].Red = (ushort)(RGBColor.R(endColor) << 8);
fVertices[1].Green = (ushort)(RGBColor.G(endColor) << 8);
fVertices[1].Blue = (ushort)(RGBColor.B(endColor) << 8);
fVertices[1].Alpha = 0x0000;
fGradientRect[0].UpperLeft = 0;
fGradientRect[0].LowerRight = 1;
fGradientDirection = style;
}
public static void Pack(BufferChunk chunk, GRADIENT_RECT[] gRect)
{
int nRects = gRect.Length;
chunk += nRects;
for (int i = 0; i < nRects; i++)
{
chunk += gRect[i].UpperLeft;
chunk += gRect[i].LowerRight;
}
}
GRADIENT_RECT[] UnpackGRADIENT_RECT(BufferChunk chunk)
{
int nRects = chunk.NextInt32();
GRADIENT_RECT[] pMesh = new GRADIENT_RECT[nRects];
for (int i = 0; i < nRects; i++)
{
pMesh[i].UpperLeft = chunk.NextUInt32();
pMesh[i].LowerRight = chunk.NextUInt32();
}
return pMesh;
}
public virtual void GradientFill(TRIVERTEX[] pVertex, GRADIENT_RECT[] pMesh, uint dwMode)
{
GDI32.GradientFill(HDC, pVertex, (uint)pVertex.Length, pMesh, (uint)pMesh.Length, dwMode);
}
public static extern bool GradientRectangle( [In] SafeHandle hdc, // handle to DC TRIVERTEX[] pVertex, // array of vertices int dwNumVertex, // number of vertices GRADIENT_RECT[] pMesh, // array of gradients int dwNumMesh, // size of gradient array int dwMode // gradient fill mode );
public GradientRect(TRIVERTEX[] vertices, GRADIENT_RECT[] mesh, GradientRectDirection style)
{
fVertices = vertices;
fGradientRect = mesh;
fGradientDirection = style;
}
// Gradient Fills
public override void GradientRectangle(TRIVERTEX[] pVertex, GRADIENT_RECT[] pMesh, uint dwMode)
{
BufferChunk chunk = new BufferChunk(1024);
chunk += GDI32.EMR_GRADIENTFILL;
// Pack the vertices
Pack(chunk, pVertex);
// Pack the gradient mesh
Pack(chunk, pMesh);
// pack the mode
chunk += dwMode;
PackCommand(chunk);
}
