/** Updates the filter program. */
public void updateFilter() {
Texture2dProgram.ProgramType programType;
float[] kernel = null;
float colorAdj = 0.0f;
Log.d(TAG, "Updating filter to " + mNewFilter);
switch (mNewFilter) {
case CameraCaptureActivity.FILTER_NONE:
programType = Texture2dProgram.ProgramType.TEXTURE_EXT;
break;
case CameraCaptureActivity.FILTER_BLACK_WHITE:
// (In a previous version the TEXTURE_EXT_BW variant was enabled by a flag called
// ROSE_COLORED_GLASSES, because the shader set the red channel to the B&W color
// and green/blue to zero.)
programType = Texture2dProgram.ProgramType.TEXTURE_EXT_BW;
break;
case CameraCaptureActivity.FILTER_BLUR:
programType = Texture2dProgram.ProgramType.TEXTURE_EXT_FILT;
kernel =
new float[] {
1f / 16f, 2f / 16f, 1f / 16f,
2f / 16f, 4f / 16f, 2f / 16f,
1f / 16f, 2f / 16f, 1f / 16f
};
break;
case CameraCaptureActivity.FILTER_SHARPEN:
programType = Texture2dProgram.ProgramType.TEXTURE_EXT_FILT;
kernel = new float[] {0f, -1f, 0f, -1f, 5f, -1f, 0f, -1f, 0f};
break;
case CameraCaptureActivity.FILTER_EDGE_DETECT:
programType = Texture2dProgram.ProgramType.TEXTURE_EXT_FILT;
kernel =
new float[] {
-1f, -1f, -1f,
-1f, 8f, -1f,
-1f, -1f, -1f
};
break;
case CameraCaptureActivity.FILTER_EMBOSS:
programType = Texture2dProgram.ProgramType.TEXTURE_EXT_FILT;
kernel =
new float[] {
2f, 0f, 0f,
0f, -1f, 0f,
0f, 0f, -1f
};
colorAdj = 0.5f;
break;
default:
throw new RuntimeException("Unknown filter mode " + mNewFilter);
}
// Do we need a whole new program? (We want to avoid doing this if we don't have
// too -- compiling a program could be expensive.)
if (programType != mFullScreen.getProgram().getProgramType()) {
mFullScreen.changeProgram(new Texture2dProgram(programType));
// If we created a new program, we need to initialize the texture width/height.
mIncomingSizeUpdated = true;
}
// Update the filter kernel (if any).
if (kernel != null) {
mFullScreen.getProgram().setKernel(kernel, colorAdj);
}
mCurrentFilter = mNewFilter;
}
