FixedRotationFilterpublic class FixedRotationFilter extends android.filterfw.core.Filter | The FixedRotationFilter rotates the input image clockwise, it only accepts
4 rotation angles: 0, 90, 180, 270 |
| Fields Summary |
|---|
| private int | mRotation | | private android.filterfw.core.ShaderProgram | mProgram |
| Constructors Summary |
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public FixedRotationFilter(String name)
super(name);
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| Methods Summary |
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| public android.filterfw.core.FrameFormat | getOutputFormat(java.lang.String portName, android.filterfw.core.FrameFormat inputFormat)
return inputFormat;
| | public void | process(android.filterfw.core.FilterContext context)
Frame input = pullInput("image");
if (mRotation == 0) {
pushOutput("image", input);
return;
}
FrameFormat inputFormat = input.getFormat();
// Create program if not created already
if (mProgram == null) {
mProgram = ShaderProgram.createIdentity(context);
}
MutableFrameFormat outputFormat = inputFormat.mutableCopy();
int width = inputFormat.getWidth();
int height = inputFormat.getHeight();
Point p1 = new Point(0.0f, 0.0f);
Point p2 = new Point(1.0f, 0.0f);
Point p3 = new Point(0.0f, 1.0f);
Point p4 = new Point(1.0f, 1.0f);
Quad sourceRegion;
switch (((int)Math.round(mRotation / 90f)) % 4) {
case 1:
sourceRegion = new Quad(p3,p1,p4,p2);
outputFormat.setDimensions(height, width);
break;
case 2:
sourceRegion = new Quad(p4,p3,p2,p1);
break;
case 3:
sourceRegion = new Quad(p2,p4,p1,p3);
outputFormat.setDimensions(height, width);
break;
case 0:
default:
sourceRegion = new Quad(p1,p2,p3,p4);
break;
}
// Create output frame
Frame output = context.getFrameManager().newFrame(outputFormat);
// Set the source region
mProgram.setSourceRegion(sourceRegion);
// Process
mProgram.process(input, output);
// Push output
pushOutput("image", output);
// Release pushed frame
output.release();
| | public void | setupPorts()
addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA,
FrameFormat.TARGET_GPU));
addOutputBasedOnInput("image", "image");
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