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Add method to compile program from shader paths in GlUtil

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This method will be useful for adding Open GL to the Transformer.

PiperOrigin-RevId: 394420744
This commit is contained in:
kimvde 2021-09-02 11:15:47 +01:00 committed by bachinger
parent 68eff51d96
commit 373db56a52
2 changed files with 29 additions and 18 deletions
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27
demos/gl/src/main/java/com/google/android/exoplayer2/gldemo/BitmapOverlayVideoProcessor.java
View File

@ -28,9 +28,7 @@ import androidx.annotation.Nullable;
import com.google.android.exoplayer2.C; import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.util.Assertions; import com.google.android.exoplayer2.util.Assertions;
import com.google.android.exoplayer2.util.GlUtil; import com.google.android.exoplayer2.util.GlUtil;
import com.google.android.exoplayer2.util.Util;
import java.io.IOException; import java.io.IOException;
import java.io.InputStream;
import java.util.Locale; import java.util.Locale;
import javax.microedition.khronos.opengles.GL10; import javax.microedition.khronos.opengles.GL10;
@ -79,10 +77,15 @@ import javax.microedition.khronos.opengles.GL10;
@Override @Override
public void initialize() { public void initialize() {
String vertexShaderCode = String vertexShaderCode;
loadAssetAsString(context, "bitmap_overlay_video_processor_vertex.glsl"); String fragmentShaderCode;
String fragmentShaderCode = try {
loadAssetAsString(context, "bitmap_overlay_video_processor_fragment.glsl"); vertexShaderCode = GlUtil.loadAsset(context, "bitmap_overlay_video_processor_vertex.glsl");
fragmentShaderCode =
GlUtil.loadAsset(context, "bitmap_overlay_video_processor_fragment.glsl");
} catch (IOException e) {
throw new IllegalStateException(e);
}
program = GlUtil.compileProgram(vertexShaderCode, fragmentShaderCode); program = GlUtil.compileProgram(vertexShaderCode, fragmentShaderCode);
GlUtil.Attribute[] attributes = GlUtil.getAttributes(program); GlUtil.Attribute[] attributes = GlUtil.getAttributes(program);
GlUtil.Uniform[] uniforms = GlUtil.getUniforms(program); GlUtil.Uniform[] uniforms = GlUtil.getUniforms(program);
@ -156,16 +159,4 @@ import javax.microedition.khronos.opengles.GL10;
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, /* first= */ 0, /* count= */ 4); GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, /* first= */ 0, /* count= */ 4);
GlUtil.checkGlError(); GlUtil.checkGlError();
} }
private static String loadAssetAsString(Context context, String assetFileName) {
@Nullable InputStream inputStream = null;
try {
inputStream = context.getAssets().open(assetFileName);
return Util.fromUtf8Bytes(Util.toByteArray(inputStream));
} catch (IOException e) {
throw new IllegalStateException(e);
} finally {
Util.closeQuietly(inputStream);
}
}
} }

20
library/common/src/main/java/com/google/android/exoplayer2/util/GlUtil.java
View File

@ -31,6 +31,8 @@ import androidx.annotation.DoNotInline;
import androidx.annotation.Nullable; import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi; import androidx.annotation.RequiresApi;
import com.google.android.exoplayer2.C; import com.google.android.exoplayer2.C;
import java.io.IOException;
import java.io.InputStream;
import java.nio.Buffer; import java.nio.Buffer;
import java.nio.ByteBuffer; import java.nio.ByteBuffer;
import java.nio.ByteOrder; import java.nio.ByteOrder;
@ -435,6 +437,24 @@ public final class GlUtil {
return byteBuffer.order(ByteOrder.nativeOrder()).asFloatBuffer(); return byteBuffer.order(ByteOrder.nativeOrder()).asFloatBuffer();
} }
/**
* Loads a file from the assets folder.
*
* @param context The {@link Context}.
* @param assetPath The path to the file to load, from the assets folder.
* @return The content of the file to load.
* @throws IOException If the file couldn't be read.
*/
public static String loadAsset(Context context, String assetPath) throws IOException {
@Nullable InputStream inputStream = null;
try {
inputStream = context.getAssets().open(assetPath);
return Util.fromUtf8Bytes(Util.toByteArray(inputStream));
} finally {
Util.closeQuietly(inputStream);
}
}
/** /**
* Creates a GL_TEXTURE_EXTERNAL_OES with default configuration of GL_LINEAR filtering and * Creates a GL_TEXTURE_EXTERNAL_OES with default configuration of GL_LINEAR filtering and
* GL_CLAMP_TO_EDGE wrapping. * GL_CLAMP_TO_EDGE wrapping.