| /* |
| * Copyright 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.graphics; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| |
| import libcore.util.NativeAllocationRegistry; |
| |
| /** |
| * Shader that calculates pixel output with a program (fragment shader) running on a GPU. |
| * @hide |
| */ |
| public class RuntimeShader extends Shader { |
| |
| private static class NoImagePreloadHolder { |
| public static final NativeAllocationRegistry sRegistry = |
| NativeAllocationRegistry.createMalloced( |
| RuntimeShader.class.getClassLoader(), nativeGetFinalizer()); |
| } |
| |
| private byte[] mUniforms; |
| private boolean mIsOpaque; |
| |
| /** |
| * Current native shader factory instance. |
| */ |
| private long mNativeInstanceRuntimeShaderFactory; |
| |
| /** |
| * Creates a new RuntimeShader. |
| * |
| * @param sksl The text of SKSL program to run on the GPU. |
| * @param uniforms Array of parameters passed by the SKSL shader. Array size depends |
| * on number of uniforms declared by sksl. |
| * @param isOpaque True if all pixels have alpha 1.0f. |
| */ |
| public RuntimeShader(@NonNull String sksl, @Nullable byte[] uniforms, boolean isOpaque) { |
| this(sksl, uniforms, isOpaque, ColorSpace.get(ColorSpace.Named.SRGB)); |
| } |
| |
| private RuntimeShader(@NonNull String sksl, @Nullable byte[] uniforms, boolean isOpaque, |
| ColorSpace colorSpace) { |
| super(colorSpace); |
| mUniforms = uniforms; |
| mIsOpaque = isOpaque; |
| mNativeInstanceRuntimeShaderFactory = nativeCreateShaderFactory(sksl); |
| NoImagePreloadHolder.sRegistry.registerNativeAllocation(this, |
| mNativeInstanceRuntimeShaderFactory); |
| } |
| |
| /** |
| * Sets new value for shader parameters. |
| * |
| * @param uniforms Array of parameters passed by the SKSL shader. Array size depends |
| * on number of uniforms declared by mSksl. |
| */ |
| public void updateUniforms(@Nullable byte[] uniforms) { |
| mUniforms = uniforms; |
| discardNativeInstance(); |
| } |
| |
| @Override |
| long createNativeInstance(long nativeMatrix) { |
| return nativeCreate(mNativeInstanceRuntimeShaderFactory, nativeMatrix, mUniforms, |
| colorSpace().getNativeInstance(), mIsOpaque); |
| } |
| |
| private static native long nativeCreate(long shaderFactory, long matrix, byte[] inputs, |
| long colorSpaceHandle, boolean isOpaque); |
| |
| private static native long nativeCreateShaderFactory(String sksl); |
| |
| private static native long nativeGetFinalizer(); |
| } |
| |