Mattia Iavarone
5 years ago
parent
24b02caa28
commit
8bad417cf2
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package com.otaliastudios.cameraview.internal; |
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import android.opengl.GLES11Ext; |
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import android.opengl.GLES20; |
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import androidx.annotation.NonNull; |
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import com.otaliastudios.cameraview.CameraLogger; |
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import com.otaliastudios.cameraview.filter.Filter; |
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import com.otaliastudios.cameraview.filter.NoFilter; |
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import com.otaliastudios.opengl.core.Egloo; |
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import com.otaliastudios.opengl.program.GlProgram; |
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import com.otaliastudios.opengl.texture.GlTexture; |
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public class GlTextureDrawer { |
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private final static String TAG = GlTextureDrawer.class.getSimpleName(); |
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private final static CameraLogger LOG = CameraLogger.create(TAG); |
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private final static int TEXTURE_TARGET = GLES11Ext.GL_TEXTURE_EXTERNAL_OES; |
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private final static int TEXTURE_UNIT = GLES20.GL_TEXTURE0; |
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private final GlTexture mTexture; |
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private final float[] mTextureTransform = Egloo.IDENTITY_MATRIX.clone(); |
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@NonNull |
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private Filter mFilter = new NoFilter(); |
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private Filter mPendingFilter = null; |
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private int mProgramHandle = -1; |
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@SuppressWarnings("unused") |
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public GlTextureDrawer() { |
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this(new GlTexture(TEXTURE_UNIT, TEXTURE_TARGET)); |
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} |
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@SuppressWarnings("unused") |
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public GlTextureDrawer(int textureId) { |
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this(new GlTexture(TEXTURE_UNIT, TEXTURE_TARGET, textureId)); |
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} |
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@SuppressWarnings("WeakerAccess") |
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public GlTextureDrawer(@NonNull GlTexture texture) { |
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mTexture = texture; |
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} |
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public void setFilter(@NonNull Filter filter) { |
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mPendingFilter = filter; |
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} |
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@NonNull |
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public GlTexture getTexture() { |
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return mTexture; |
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} |
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@NonNull |
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public float[] getTextureTransform() { |
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return mTextureTransform; |
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} |
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public void draw(long timestampUs) { |
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if (mPendingFilter != null) { |
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release(); |
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mFilter = mPendingFilter; |
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mPendingFilter = null; |
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} |
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if (mProgramHandle == -1) { |
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mProgramHandle = GlProgram.create( |
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mFilter.getVertexShader(), |
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mFilter.getFragmentShader()); |
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mFilter.onCreate(mProgramHandle); |
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} |
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Egloo.checkGlError("draw start"); |
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// Select the program and the active texture.
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GLES20.glUseProgram(mProgramHandle); |
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Egloo.checkGlError("glUseProgram"); |
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GLES20.glActiveTexture(mTexture.getUnit()); |
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GLES20.glBindTexture(mTexture.getTarget(), mTexture.getId()); |
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// Draw and release.
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mFilter.draw(timestampUs, mTextureTransform); |
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GLES20.glBindTexture(mTexture.getTarget(), 0); |
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GLES20.glUseProgram(0); |
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Egloo.checkGlError("draw end"); |
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} |
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public void release() { |
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if (mProgramHandle == -1) return; |
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mFilter.onDestroy(); |
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GLES20.glDeleteProgram(mProgramHandle); |
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mProgramHandle = -1; |
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} |
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} |
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@ -1,96 +0,0 @@ |
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package com.otaliastudios.cameraview.internal; |
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import android.opengl.GLES20; |
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import android.opengl.Matrix; |
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import androidx.annotation.NonNull; |
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import com.otaliastudios.cameraview.CameraLogger; |
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import java.nio.ByteBuffer; |
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import java.nio.ByteOrder; |
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import java.nio.FloatBuffer; |
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public class GlUtils { |
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private final static String TAG = GlUtils.class.getSimpleName(); |
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private final static CameraLogger LOG = CameraLogger.create(TAG); |
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// Identity matrix for general use.
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public static final float[] IDENTITY_MATRIX = new float[16]; |
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static { |
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Matrix.setIdentityM(IDENTITY_MATRIX, 0); |
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} |
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public static void checkError(@NonNull String opName) { |
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int error = GLES20.glGetError(); |
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if (error != GLES20.GL_NO_ERROR) { |
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String message = LOG.e("Error during", opName, "glError 0x", |
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Integer.toHexString(error)); |
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throw new RuntimeException(message); |
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} |
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} |
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public static void checkLocation(int location, @NonNull String name) { |
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if (location < 0) { |
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String message = LOG.e("Unable to locate", name, "in program"); |
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throw new RuntimeException(message); |
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} |
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} |
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// Compiles the given shader, returns a handle.
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@SuppressWarnings("WeakerAccess") |
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public static int loadShader(int shaderType, @NonNull String source) { |
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int shader = GLES20.glCreateShader(shaderType); |
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checkError("glCreateShader type=" + shaderType); |
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GLES20.glShaderSource(shader, source); |
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GLES20.glCompileShader(shader); |
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int[] compiled = new int[1]; |
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GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0); |
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if (compiled[0] == 0) { |
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LOG.e("Could not compile shader", shaderType, ":", |
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GLES20.glGetShaderInfoLog(shader)); |
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GLES20.glDeleteShader(shader); |
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shader = 0; |
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} |
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return shader; |
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} |
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// Creates a program with given vertex shader and pixel shader.
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public static int createProgram(@NonNull String vertexSource, @NonNull String fragmentSource) { |
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int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource); |
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if (vertexShader == 0) return 0; |
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int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource); |
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if (pixelShader == 0) return 0; |
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int program = GLES20.glCreateProgram(); |
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checkError("glCreateProgram"); |
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if (program == 0) { |
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LOG.e("Could not create program"); |
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} |
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GLES20.glAttachShader(program, vertexShader); |
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checkError("glAttachShader"); |
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GLES20.glAttachShader(program, pixelShader); |
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checkError("glAttachShader"); |
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GLES20.glLinkProgram(program); |
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int[] linkStatus = new int[1]; |
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GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus, 0); |
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if (linkStatus[0] != GLES20.GL_TRUE) { |
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LOG.e("Could not link program:", GLES20.glGetProgramInfoLog(program)); |
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GLES20.glDeleteProgram(program); |
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program = 0; |
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} |
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return program; |
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} |
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// Allocates a direct float buffer, and populates it with the float array data.
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public static FloatBuffer floatBuffer(@NonNull float[] coords) { |
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// Allocate a direct ByteBuffer, using 4 bytes per float, and copy coords into it.
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ByteBuffer bb = ByteBuffer.allocateDirect(coords.length * 4); |
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bb.order(ByteOrder.nativeOrder()); |
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FloatBuffer fb = bb.asFloatBuffer(); |
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fb.put(coords); |
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fb.position(0); |
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return fb; |
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} |
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} |
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@ -1 +1,3 @@ |
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include ':demo', ':cameraview' |
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include ':egloo' |
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project(':egloo').projectDir = file('../Egloo/library') |
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