public RGradient(ref Pixel32Struct pxUpper, ref Pixel32Struct pxLower)
{
try {
Init(256);
bool bTest = From(ref pxUpper, ref pxLower);
}
catch (Exception exn) {
RReporting.ShowExn(exn, "creating gradient values", "RImage(Pixel32Struct) constructor");
}
}
public Pixel32Struct PixelFromTop()
{
Pixel32Struct pxReturn = new Pixel32Struct();
try {
pxReturn.B = by2dGrad[iGrad - 1][0];
pxReturn.G = by2dGrad[iGrad - 1][1];
pxReturn.R = by2dGrad[iGrad - 1][2];
pxReturn.A = by2dGrad[iGrad - 1][3];
}
catch (Exception exn) {
RReporting.ShowExn(exn, "getting top gradient pixel", "RImage PixelFromTop");
}
return(pxReturn);
}
public RGradient()
{
try {
Init(256);
Pixel32Struct pxUpper = new Pixel32Struct();
Pixel32Struct pxLower = new Pixel32Struct();
pxUpper.A = 255;
pxLower.B = 255;
pxLower.G = 255;
pxLower.R = 255;
bool bTest = From(ref pxUpper, ref pxLower);
}
catch (Exception exn) {
RReporting.ShowExn(exn, "creating gradient values", "RImage(void) constructor");
}
}
public RGradient(int iShades)
{
try {
Init(iShades);
Pixel32Struct pxUpper = new Pixel32Struct();
Pixel32Struct pxLower = new Pixel32Struct();
pxUpper.A = 255;
pxLower.B = 255;
pxLower.G = 255;
pxLower.R = 255;
if (!From(ref pxUpper, ref pxLower))
{
RReporting.ShowErr("Error calculating gradient values", "", "RImage(int) constructor");
}
}
catch (Exception exn) {
RReporting.ShowExn(exn, "creating gradient values", "RImage(int) constructor");
}
}
public bool From(ref Pixel32Struct pxUpper, ref Pixel32Struct pxLower)
{
bool bGood = false;
try {
FPx fpxUpper = new FPx();
FPx fpxLower = new FPx();
fpxUpper.B = (float)pxUpper.B;
fpxUpper.G = (float)pxUpper.G;
fpxUpper.R = (float)pxUpper.R;
fpxUpper.A = (float)pxUpper.A;
fpxLower.B = (float)pxLower.B;
fpxLower.G = (float)pxLower.G;
fpxLower.R = (float)pxLower.R;
fpxLower.A = (float)pxLower.A;
float fGrad = (int)iGrad;
int iVal = 0;
float fVal;
float fOpacity;
//needs to be float in case gradient is longer than 256!!!
for (fVal = 0; fVal < fGrad; fVal += 1.0f, iVal++)
{
fOpacity = fVal / 255.0f;
by2dGrad[iVal][0] = (byte)(((fpxUpper.B - fpxLower.B) * fOpacity + fpxLower.B) + .5f);
by2dGrad[iVal][1] = (byte)(((fpxUpper.G - fpxLower.G) * fOpacity + fpxLower.G) + .5f);
by2dGrad[iVal][2] = (byte)(((fpxUpper.R - fpxLower.R) * fOpacity + fpxLower.R) + .5f);
by2dGrad[iVal][3] = (byte)(((fpxUpper.A - fpxLower.A) * fOpacity + fpxLower.A) + .5f);
}
//bGood=ByteArrayFromPixArray();
}
catch (Exception exn) {
RReporting.ShowExn(exn, "changing gradient values", "RImage From(Pixel32Struct)");
bGood = false;
}
return(bGood);
} //end From(Pixel32Struct,Pixel32Struct)
