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package com.android.phasebeam;
import static android.renderscript.Sampler.Value.NEAREST;
import static android.renderscript.Sampler.Value.WRAP;
import android.content.res.Resources;
import android.renderscript.Allocation;
import android.renderscript.Matrix4f;
import android.renderscript.Mesh;
import android.renderscript.Program;
import android.renderscript.ProgramFragment;
import android.renderscript.ProgramFragmentFixedFunction;
import android.renderscript.ProgramRaster;
import android.renderscript.ProgramStore;
import android.renderscript.ProgramVertex;
import android.renderscript.ProgramVertexFixedFunction;
import android.renderscript.RenderScriptGL;
import android.renderscript.Sampler;
import android.renderscript.ProgramStore.BlendDstFunc;
import android.renderscript.ProgramStore.BlendSrcFunc;
public class PhaseBeamRS {
public static final int DOT_COUNT = 18;
private Resources mRes;
private RenderScriptGL mRS;
private ScriptC_phasebeam mScript;
int mHeight;
int mWidth;
private ScriptField_VpConsts mPvConsts;
private Allocation dotAllocation;
private Allocation beamAllocation;
private Allocation bgAllocation;
private ScriptField_Particle dotParticles;
private Mesh dotMesh;
private ScriptField_Particle beamParticles;
private Mesh beamMesh;
private int densityDPI;
boolean inited = false;
public void init(int dpi, RenderScriptGL rs, Resources res, int width, int height) {
if (!inited) {
densityDPI = dpi;
mRS = rs;
mRes = res;
mWidth = width;
mHeight = height;
dotParticles = new ScriptField_Particle(mRS, DOT_COUNT);
Mesh.AllocationBuilder smb2 = new Mesh.AllocationBuilder(mRS);
smb2.addVertexAllocation(dotParticles.getAllocation());
smb2.addIndexSetType(Mesh.Primitive.POINT);
dotMesh = smb2.create();
beamParticles = new ScriptField_Particle(mRS, DOT_COUNT);
Mesh.AllocationBuilder smb3 = new Mesh.AllocationBuilder(mRS);
smb3.addVertexAllocation(beamParticles.getAllocation());
smb3.addIndexSetType(Mesh.Primitive.POINT);
beamMesh = smb3.create();
mScript = new ScriptC_phasebeam(mRS, mRes, R.raw.phasebeam);
mScript.set_dotMesh(dotMesh);
mScript.set_beamMesh(beamMesh);
mScript.bind_dotParticles(dotParticles);
mScript.bind_beamParticles(beamParticles);
mPvConsts = new ScriptField_VpConsts(mRS, 1);
createProgramVertex();
createProgramRaster();
createProgramFragmentStore();
createProgramFragment();
loadTextures();
mScript.set_densityDPI(densityDPI);
mRS.bindRootScript(mScript);
mScript.invoke_positionParticles();
inited = true;
}
}
private Matrix4f getProjectionNormalized(int w, int h) {
// range -1,1 in the narrow axis at z = 0.
Matrix4f m1 = new Matrix4f();
Matrix4f m2 = new Matrix4f();
if (w > h) {
float aspect = ((float) w) / h;
m1.loadFrustum(-aspect, aspect, -1, 1, 1, 100);
} else {
float aspect = ((float) h) / w;
m1.loadFrustum(-1, 1, -aspect, aspect, 1, 100);
}
m2.loadRotate(180, 0, 1, 0);
m1.loadMultiply(m1, m2);
m2.loadScale(-1, 1, 1);
m1.loadMultiply(m1, m2);
m2.loadTranslate(0, 0, 1);
m1.loadMultiply(m1, m2);
return m1;
}
private void updateProjectionMatrices() {
Matrix4f projNorm = getProjectionNormalized(mWidth, mHeight);
ScriptField_VpConsts.Item i = new ScriptField_VpConsts.Item();
i.MVP = projNorm;
i.scaleSize = densityDPI / 240.0f;
mPvConsts.set(i, 0, true);
}
private Allocation loadTexture(int id) {
final Allocation allocation = Allocation.createFromBitmapResource(mRS, mRes, id);
return allocation;
}
private void loadTextures() {
dotAllocation = loadTexture(R.drawable.dot);
beamAllocation = loadTexture(R.drawable.beam);
bgAllocation = loadTexture(R.drawable.bg);
mScript.set_textureDot(dotAllocation);
mScript.set_textureBeam(beamAllocation);
mScript.set_textureBg(bgAllocation);
}
private void createProgramVertex() {
ProgramVertexFixedFunction.Constants mPvOrthoAlloc =
new ProgramVertexFixedFunction.Constants(mRS);
Matrix4f proj = new Matrix4f();
proj.loadOrthoWindow(mWidth, mHeight);
mPvOrthoAlloc.setProjection(proj);
ProgramVertexFixedFunction.Builder pvb = new ProgramVertexFixedFunction.Builder(mRS);
ProgramVertex pv = pvb.create();
((ProgramVertexFixedFunction) pv).bindConstants(mPvOrthoAlloc);
mScript.set_vertBg(pv);
updateProjectionMatrices();
ProgramVertex.Builder builder = new ProgramVertex.Builder(mRS);
builder.setShader(mRes, R.raw.dot_vs);
builder.addConstant(mPvConsts.getType());
builder.addInput(dotMesh.getVertexAllocation(0).getType().getElement());
ProgramVertex pvs = builder.create();
pvs.bindConstants(mPvConsts.getAllocation(), 0);
mRS.bindProgramVertex(pvs);
mScript.set_vertDots(pvs);
}
private void createProgramFragment() {
Sampler.Builder samplerBuilder = new Sampler.Builder(mRS);
samplerBuilder.setMinification(NEAREST);
samplerBuilder.setMagnification(NEAREST);
samplerBuilder.setWrapS(WRAP);
samplerBuilder.setWrapT(WRAP);
Sampler sn = samplerBuilder.create();
ProgramFragmentFixedFunction.Builder builderff =
new ProgramFragmentFixedFunction.Builder(mRS);
builderff = new ProgramFragmentFixedFunction.Builder(mRS);
builderff.setTexture(ProgramFragmentFixedFunction.Builder.EnvMode.REPLACE,
ProgramFragmentFixedFunction.Builder.Format.RGB, 0);
ProgramFragment pfff = builderff.create();
mScript.set_fragBg(pfff);
pfff.bindSampler(sn, 0);
ProgramFragment.Builder builder = new ProgramFragment.Builder(mRS);
builder.setShader(mRes, R.raw.dot_fs);
builder.addTexture(Program.TextureType.TEXTURE_2D);
ProgramFragment pf = builder.create();
pf.bindSampler(Sampler.CLAMP_LINEAR(mRS), 0);
mScript.set_fragDots(pf);
}
private void createProgramRaster() {
ProgramRaster.Builder builder = new ProgramRaster.Builder(mRS);
builder.setPointSpriteEnabled(true);
ProgramRaster pr = builder.create();
mRS.bindProgramRaster(pr);
}
private void createProgramFragmentStore() {
ProgramStore.Builder builder = new ProgramStore.Builder(mRS);
builder.setBlendFunc(BlendSrcFunc.SRC_ALPHA, BlendDstFunc.ONE);
mRS.bindProgramStore(builder.create());
}
public void start() {
mRS.bindRootScript(mScript);
}
public void stop() {
mRS.bindRootScript(null);
}
public void setOffset(float xOffset, float yOffset, int xPixels, int yPixels) {
mScript.set_xOffset(xOffset);
}
public void resize(int w, int h) {
// why do i need to do this again when surface changed for wallpaper, but not when as an app?
ProgramVertexFixedFunction.Constants mPvOrthoAlloc =
new ProgramVertexFixedFunction.Constants(mRS);
Matrix4f proj = new Matrix4f();
proj.loadOrthoWindow(w, h);
mPvOrthoAlloc.setProjection(proj);
ProgramVertexFixedFunction.Builder pvb = new ProgramVertexFixedFunction.Builder(mRS);
ProgramVertex pv = pvb.create();
((ProgramVertexFixedFunction) pv).bindConstants(mPvOrthoAlloc);
mScript.set_vertBg(pv);
}
}
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