Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 154 insertions, 0 deletions

diff --git a/android/source/src/java/org/mozilla/gecko/gfx/SingleTileLayer.java b/android/source/src/java/org/mozilla/gecko/gfx/SingleTileLayer.java
new file mode 100644
index 000000000..0bc271678
--- /dev/null
+++ b/android/source/src/java/org/mozilla/gecko/gfx/SingleTileLayer.java
@@ -0,0 +1,154 @@
+/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.gfx;
+
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.graphics.Region;
+import android.graphics.RegionIterator;
+import android.opengl.GLES20;
+
+import java.nio.FloatBuffer;
+
+/**
+ * Encapsulates the logic needed to draw a single textured tile.
+ *
+ * TODO: Repeating textures really should be their own type of layer.
+ */
+public class SingleTileLayer extends TileLayer {
+    private static final String LOGTAG = "GeckoSingleTileLayer";
+
+    private Rect mMask;
+
+    // To avoid excessive GC, declare some objects here that would otherwise
+    // be created and destroyed frequently during draw().
+    private final RectF mBounds;
+    private final RectF mTextureBounds;
+    private final RectF mViewport;
+    private final Rect mIntBounds;
+    private final Rect mSubRect;
+    private final RectF mSubRectF;
+    private final Region mMaskedBounds;
+    private final Rect mCropRect;
+    private final RectF mObjRectF;
+    private final float[] mCoords;
+
+    public SingleTileLayer(CairoImage image) {
+        this(false, image);
+    }
+
+    public SingleTileLayer(boolean repeat, CairoImage image) {
+        this(image, repeat ? TileLayer.PaintMode.REPEAT : TileLayer.PaintMode.NORMAL);
+    }
+
+    public SingleTileLayer(CairoImage image, TileLayer.PaintMode paintMode) {
+        super(image, paintMode);
+
+        mBounds = new RectF();
+        mTextureBounds = new RectF();
+        mViewport = new RectF();
+        mIntBounds = new Rect();
+        mSubRect = new Rect();
+        mSubRectF = new RectF();
+        mMaskedBounds = new Region();
+        mCropRect = new Rect();
+        mObjRectF = new RectF();
+        mCoords = new float[20];
+    }
+
+    /**
+     * Set an area to mask out when rendering.
+     */
+    public void setMask(Rect aMaskRect) {
+        mMask = aMaskRect;
+    }
+
+    @Override
+    public void draw(RenderContext context) {
+        // mTextureIDs may be null here during startup if Layer.java's draw method
+        // failed to acquire the transaction lock and call performUpdates.
+        if (!initialized())
+            return;
+
+        mViewport.set(context.viewport);
+
+        if (repeats()) {
+            // If we're repeating, we want to adjust the texture bounds so that
+            // the texture repeats the correct number of times when drawn at
+            // the size of the viewport.
+            mBounds.set(getBounds(context));
+            mTextureBounds.set(0.0f, 0.0f, mBounds.width(), mBounds.height());
+            mBounds.set(0.0f, 0.0f, mViewport.width(), mViewport.height());
+        } else if (stretches()) {
+            // If we're stretching, we just want the bounds and texture bounds
+            // to fit to the page.
+            mBounds.set(context.pageRect);
+            mTextureBounds.set(mBounds);
+        } else {
+            mBounds.set(getBounds(context));
+            mTextureBounds.set(mBounds);
+        }
+
+        mBounds.roundOut(mIntBounds);
+        mMaskedBounds.set(mIntBounds);
+        if (mMask != null) {
+            mMaskedBounds.op(mMask, Region.Op.DIFFERENCE);
+            if (mMaskedBounds.isEmpty())
+                return;
+        }
+
+        // XXX Possible optimisation here, form this array so we can draw it in
+        //     a single call.
+        RegionIterator i = new RegionIterator(mMaskedBounds);
+        while (i.next(mSubRect)) {
+            // Compensate for rounding errors at the edge of the tile caused by
+            // the roundOut above
+            mSubRectF.set(Math.max(mBounds.left, (float)mSubRect.left),
+                          Math.max(mBounds.top, (float)mSubRect.top),
+                          Math.min(mBounds.right, (float)mSubRect.right),
+                          Math.min(mBounds.bottom, (float)mSubRect.bottom));
+
+            // This is the left/top/right/bottom of the rect, relative to the
+            // bottom-left of the layer, to use for texture coordinates.
+            mCropRect.set(Math.round(mSubRectF.left - mBounds.left),
+                          Math.round(mBounds.bottom - mSubRectF.top),
+                          Math.round(mSubRectF.right - mBounds.left),
+                          Math.round(mBounds.bottom - mSubRectF.bottom));
+
+            mObjRectF.set(mSubRectF.left - mViewport.left,
+                          mViewport.bottom - mSubRectF.bottom,
+                          mSubRectF.right - mViewport.left,
+                          mViewport.bottom - mSubRectF.top);
+
+            fillRectCoordBuffer(mCoords, mObjRectF, mViewport.width(), mViewport.height(),
+                                mCropRect, mTextureBounds.width(), mTextureBounds.height());
+
+            FloatBuffer coordBuffer = context.coordBuffer;
+            int positionHandle = context.positionHandle;
+            int textureHandle = context.textureHandle;
+
+            GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
+            GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, getTextureID());
+
+            // Make sure we are at position zero in the buffer
+            coordBuffer.position(0);
+            coordBuffer.put(mCoords);
+
+            // Unbind any the current array buffer so we can use client side buffers
+            GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 0);
+
+            // Vertex coordinates are x,y,z starting at position 0 into the buffer.
+            coordBuffer.position(0);
+            GLES20.glVertexAttribPointer(positionHandle, 3, GLES20.GL_FLOAT, false, 20, coordBuffer);
+
+            // Texture coordinates are texture_x, texture_y starting at position 3 into the buffer.
+            coordBuffer.position(3);
+            GLES20.glVertexAttribPointer(textureHandle, 2, GLES20.GL_FLOAT, false, 20, coordBuffer);
+            GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
+        }
+    }
+}
+