Remove scale from EglViewport, was used in oval shader

cameraview/src/main/gles/com/otaliastudios/cameraview/EglViewport.java

@@ -18,15 +18,12 @@ class EglViewport extends EglElement {
     private static final String SIMPLE_VERTEX_SHADER =
             "uniform mat4 uMVPMatrix;\n" +
                     "uniform mat4 uTexMatrix;\n" +
-                    "uniform vec2 uTextureScale;\n" +
                     "attribute vec4 aPosition;\n" +
                     "attribute vec4 aTextureCoord;\n" +
                     "varying vec2 vTextureCoord;\n" +
-                    "varying vec2 vTextureScale;\n" +
                     "void main() {\n" +
                     "    gl_Position = uMVPMatrix * aPosition;\n" +
                     "    vTextureCoord = (uTexMatrix * aTextureCoord).xy;\n" +
-                    "    vTextureScale = uTextureScale.xy;\n" +
                     "}\n";
 
     // Simple fragment shader for use with external 2D textures
@@ -39,33 +36,6 @@ class EglViewport extends EglElement {
                     "    gl_FragColor = texture2D(sTexture, vTextureCoord);\n" +
                     "}\n";
 
-    /**
-     * EXPERIMENT:
-     * An oval fragment shader. We draw all the pixels outside the circle of center (0.5, 0.5)
-     * and radius 0.5 as transparent. Works well, but we have:
-     *
-     * 1. black in the preview: This can be solved with a custom GlSurfaceView that overrides
-     *    dispatchDraw, and, before calling super, clips the canvas with an oval path (canvas.clipPath).
-     * 2. black in picture snapshot: This can be solved by using PNG, but it is suepr slow.
-     * 3. black in videos: No way to solve this AFAIK.
-     */
-    private static final String CIRCLE_FRAGMENT_SHADER =
-            "#extension GL_OES_EGL_image_external : require\n" +
-                    "precision mediump float;\n" +
-                    "varying vec2 vTextureCoord;\n" +
-                    "varying vec2 vTextureScale;\n" +
-                    "uniform samplerExternalOES sTexture;\n" +
-                    "vec2 axis = vec2(0.5, 0.5);\n" +
-                    "vec2 center = vec2(0.5, 0.5);\n" +
-                    "vec4 none = vec4(0.0, 0.0, 0.0, 0.0);\n" +
-                    "void main() {\n" +
-                    "    if (pow((vTextureCoord.x - center.x) / (axis.x * vTextureScale.x), 2.0) + pow((vTextureCoord.y - center.y) / (axis.y * vTextureScale.y), 2.0) > 1.0) {\n" +
-                    "        gl_FragColor = none;\n" +
-                    "    } else {\n" +
-                    "        gl_FragColor = texture2D(sTexture, vTextureCoord);\n" +
-                    "    }\n" +
-                    "}\n";
-
     // Stuff from Drawable2d.FULL_RECTANGLE
     // A full square, extending from -1 to +1 in both dimensions.
     // When the model/view/projection matrix is identity, this will exactly cover the viewport.
@@ -98,7 +68,6 @@ class EglViewport extends EglElement {
     private int muTexMatrixLocation;
     private int maPositionLocation;
     private int maTextureCoordLocation;
-    private int muTextureScaleLocation;
 
     // private int muKernelLoc; // Used for filtering
     // private int muTexOffsetLoc; // Used for filtering
@@ -111,8 +80,6 @@ class EglViewport extends EglElement {
         checkLocation(maPositionLocation, "aPosition");
         maTextureCoordLocation = GLES20.glGetAttribLocation(mProgramHandle, "aTextureCoord");
         checkLocation(maTextureCoordLocation, "aTextureCoord");
-        muTextureScaleLocation = GLES20.glGetUniformLocation(mProgramHandle, "uTextureScale");
-        checkLocation(muTextureScaleLocation, "uTextureScale");
         muMVPMatrixLocation = GLES20.glGetUniformLocation(mProgramHandle, "uMVPMatrix");
         checkLocation(muMVPMatrixLocation, "uMVPMatrix");
         muTexMatrixLocation = GLES20.glGetUniformLocation(mProgramHandle, "uTexMatrix");
@@ -149,10 +116,10 @@ class EglViewport extends EglElement {
         return texId;
     }
 
-    void drawFrame(int textureId, float[] textureMatrix, float[] textureScale) {
+    void drawFrame(int textureId, float[] textureMatrix) {
         drawFrame(textureId, textureMatrix,
                 mVertexCoordinatesArray,
-                mTextureCoordinatesArray, textureScale);
+                mTextureCoordinatesArray);
     }
 
     /**
@@ -170,8 +137,7 @@ class EglViewport extends EglElement {
      */
     private void drawFrame(int textureId, float[] textureMatrix,
                            FloatBuffer vertexBuffer,
-                           FloatBuffer texBuffer,
-                           float[] textureScale) {
+                           FloatBuffer texBuffer) {
         check("draw start");
 
         // Select the program.
@@ -190,10 +156,6 @@ class EglViewport extends EglElement {
         GLES20.glUniformMatrix4fv(muTexMatrixLocation, 1, false, textureMatrix, 0);
         check("glUniformMatrix4fv");
 
-        // Pass scale values.
-        GLES20.glUniform2fv(muTextureScaleLocation, 1, textureScale, 0);
-        check("glUniform2f");
-
         // Enable the "aPosition" vertex attribute.
         // Connect vertexBuffer to "aPosition".
         GLES20.glEnableVertexAttribArray(maPositionLocation);

cameraview/src/main/gles/com/otaliastudios/cameraview/TextureMediaEncoder.java

@@ -85,8 +85,6 @@ class TextureMediaEncoder extends VideoMediaEncoder<TextureMediaEncoder.Config>
         // Nothing to do here. Waiting for the first frame.
     }
 
-    private float[] mScaleXY = new float[2];
-
     @EncoderThread
     @Override
     void notify(@NonNull String event, @Nullable Object data) {
@@ -126,10 +124,9 @@ class TextureMediaEncoder extends VideoMediaEncoder<TextureMediaEncoder.Config>
             Matrix.translateM(transform, 0, -0.5F, -0.5F, 0);
 
             drain(false);
-            boolean flip = mConfig.scaleFlipped;// mConfig.rotation % 180 != 0;
-            mScaleXY[0] = flip ? scaleY : scaleX;
-            mScaleXY[1] = flip ? scaleX : scaleY;
-            mViewport.drawFrame(mConfig.textureId, transform, mScaleXY);
+            // Future note: passing scale values to the viewport? They are scaleX and scaleY,
+            // but flipped based on the mConfig.scaleFlipped boolean.
+            mViewport.drawFrame(mConfig.textureId, transform);
             mWindow.setPresentationTime(timestamp);
             mWindow.swapBuffers();
         }

cameraview/src/main/java/com/otaliastudios/cameraview/CameraOptions.java

@@ -58,6 +58,7 @@ public class CameraOptions {
         }
 
         // Flash
+        supportedFlash.add(Flash.OFF);
         strings = params.getSupportedFlashModes();
         if (strings != null) {
             for (String string : strings) {
@@ -67,6 +68,7 @@ public class CameraOptions {
         }
 
         // Hdr
+        supportedHdr.add(Hdr.OFF);
         strings = params.getSupportedSceneModes();
         if (strings != null) {
             for (String string : strings) {

cameraview/src/main/java/com/otaliastudios/cameraview/CameraView.java

@@ -239,13 +239,16 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
     protected CameraPreview instantiatePreview(Context context, ViewGroup container) {
         LOG.w("preview:", "isHardwareAccelerated:", isHardwareAccelerated());
         switch (mPreview) {
-            case SURFACE: return new SurfaceCameraPreview(context, container, null);
+            case SURFACE:
+                return new SurfaceCameraPreview(context, container, null);
             case TEXTURE: {
-                if (isHardwareAccelerated()) { // TextureView is not supported without hardware acceleration.
+                if (isHardwareAccelerated()) {
+                    // TextureView is not supported without hardware acceleration.
                     return new TextureCameraPreview(context, container, null);
                 }
             }
             case GL_SURFACE: default: {
+                mPreview = Preview.GL_SURFACE;
                 return new GlCameraPreview(context, container, null);
             }
         }

cameraview/src/main/java/com/otaliastudios/cameraview/SnapshotPictureRecorder.java

@@ -122,8 +122,9 @@ class SnapshotPictureRecorder extends PictureRecorder {
                         Matrix.rotateM(mTransform, 0, rotation, 0, 0, 1);
                         Matrix.translateM(mTransform, 0, -0.5F, -0.5F, 0);
 
-                        float[] scaleXY = new float[] { realScaleX, realScaleY };
-                        viewport.drawFrame(mTextureId, mTransform, scaleXY);
+                        // Future note: passing scale values to the viewport?
+                        // They are simply realScaleX and realScaleY.
+                        viewport.drawFrame(mTextureId, mTransform);
                         // don't - surface.swapBuffers();
                         mResult.data = surface.saveFrameTo(Bitmap.CompressFormat.JPEG);
                         mResult.format = PictureResult.FORMAT_JPEG;

cameraview/src/main/views/com/otaliastudios/cameraview/GlCameraPreview.java

@@ -61,7 +61,6 @@ class GlCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture> imple
     private Set<RendererFrameCallback> mRendererFrameCallbacks = Collections.synchronizedSet(new HashSet<RendererFrameCallback>());
     /* for tests */ float mScaleX = 1F;
     /* for tests */ float mScaleY = 1F;
-    private float[] mScaleXY = new float[] { mScaleX, mScaleY };
 
     private View mRootView;
 
@@ -203,9 +202,9 @@ class GlCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture> imple
             Matrix.translateM(mTransformMatrix, 0, translX, translY, 0);
             Matrix.scaleM(mTransformMatrix, 0, mScaleX, mScaleY, 1);
         }
-        mScaleXY[0] = mInputFlipped ? mScaleY : mScaleX;
-        mScaleXY[1] = mInputFlipped ? mScaleX : mScaleY;
-        mOutputViewport.drawFrame(mOutputTextureId, mTransformMatrix, mScaleXY);
+        // Future note: passing scale to the viewport?
+        // They are scaleX an scaleY, but flipped based on mInputFlipped.
+        mOutputViewport.drawFrame(mOutputTextureId, mTransformMatrix);
         for (RendererFrameCallback callback : mRendererFrameCallbacks) {
             callback.onRendererFrame(mInputSurfaceTexture, mScaleX, mScaleY);
         }