1 files changed, 216 insertions, 0 deletions
diff --git a/WebCore/platform/graphics/android/ImageBufferAndroid.cpp b/WebCore/platform/graphics/android/ImageBufferAndroid.cpp
new file mode 100644
index 0000000..de88b33
--- /dev/null
+++ b/WebCore/platform/graphics/android/ImageBufferAndroid.cpp
@@ -0,0 +1,216 @@
+/*
+ * Copyright 2007, The Android Open Source Project
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "BitmapImage.h"
+#include "ImageBuffer.h"
+#include "ImageData.h"
+#include "NotImplemented.h"
+
+#include "android_graphics.h"
+#include "GraphicsContext.h"
+#include "PlatformGraphicsContext.h"
+#include "SkBitmapRef.h"
+#include "SkCanvas.h"
+#include "SkColorPriv.h"
+#include "SkDevice.h"
+#include "SkUnPreMultiply.h"
+
+using namespace std;
+
+namespace WebCore {
+
+ImageBufferData::ImageBufferData(const IntSize&)
+{
+}
+
+ImageBuffer::ImageBuffer(const IntSize& size, bool grayScale, bool& success)
+    : m_data(size)
+    , m_size(size)
+{
+    m_context.set(GraphicsContext::createOffscreenContext(size.width(), size.height()));
+    success = true;
+}
+
+ImageBuffer::~ImageBuffer()
+{
+}
+
+GraphicsContext* ImageBuffer::context() const
+{
+    return m_context.get();
+}
+
+/*  This guy needs to make a deep copy of the bitmap, so that the returned
+    image doesn't reflect any subsequent changes to the canvas' backend.
+    e.g. this is called when <canvas> wants to make a Pattern, which needs
+    to snapshot the current pixels when it is created.
+ */
+Image* ImageBuffer::image() const
+{
+    if (!m_image) {        
+        ASSERT(context());
+        SkCanvas* canvas = context()->platformContext()->mCanvas;
+        SkDevice* device = canvas->getDevice();
+        const SkBitmap& orig = device->accessBitmap(false);
+        
+        SkBitmap copy;
+        orig.copyTo(&copy, orig.config());
+
+        SkBitmapRef* ref = new SkBitmapRef(copy);
+        m_image = BitmapImage::create(ref, 0);
+        ref->unref();
+    }
+    return m_image.get();
+}
+
+PassRefPtr<ImageData> ImageBuffer::getImageData(const IntRect& rect) const
+{
+    GraphicsContext* gc = this->context();
+    if (!gc) {
+        return 0;
+    }
+    
+    const SkBitmap& src = android_gc2canvas(gc)->getDevice()->accessBitmap(false);
+    SkAutoLockPixels alp(src);
+    if (!src.getPixels()) {
+        return 0;
+    }
+
+    PassRefPtr<ImageData> result = ImageData::create(rect.width(), rect.height());
+    unsigned char* data = result->data()->data().data();
+    
+    if (rect.x() < 0 || rect.y() < 0 || (rect.x() + rect.width()) > m_size.width() || (rect.y() + rect.height()) > m_size.height())
+        memset(data, 0, result->data()->length());
+    
+    int originx = rect.x();
+    int destx = 0;
+    if (originx < 0) {
+        destx = -originx;
+        originx = 0;
+    }
+    int endx = rect.x() + rect.width();
+    if (endx > m_size.width())
+        endx = m_size.width();
+    int numColumns = endx - originx;
+    
+    int originy = rect.y();
+    int desty = 0;
+    if (originy < 0) {
+        desty = -originy;
+        originy = 0;
+    }
+    int endy = rect.y() + rect.height();
+    if (endy > m_size.height())
+        endy = m_size.height();
+    int numRows = endy - originy;
+    
+    unsigned srcPixelsPerRow = src.rowBytesAsPixels();
+    unsigned destBytesPerRow = 4 * rect.width();
+    
+    const SkPMColor* srcRows = src.getAddr32(originx, originy);
+    unsigned char* destRows = data + desty * destBytesPerRow + destx * 4;
+    for (int y = 0; y < numRows; ++y) {
+        for (int x = 0; x < numColumns; x++) {
+            // ugh, it appears they want unpremultiplied pixels
+            SkColor c = SkUnPreMultiply::PMColorToColor(srcRows[x]);
+            int basex = x * 4;
+            destRows[basex + 0] = SkColorGetR(c);
+            destRows[basex + 1] = SkColorGetG(c);
+            destRows[basex + 2] = SkColorGetB(c);
+            destRows[basex + 3] = SkColorGetA(c);
+        }
+        srcRows += srcPixelsPerRow;
+        destRows += destBytesPerRow;
+    }
+    return result;
+}
+
+void ImageBuffer::putImageData(ImageData* source, const IntRect& sourceRect, const IntPoint& destPoint)
+{
+    GraphicsContext* gc = this->context();
+    if (!gc) {
+        return;
+    }
+    
+    const SkBitmap& dst = android_gc2canvas(gc)->getDevice()->accessBitmap(true);
+    SkAutoLockPixels alp(dst);
+    if (!dst.getPixels()) {
+        return;
+    }
+
+    ASSERT(sourceRect.width() > 0);
+    ASSERT(sourceRect.height() > 0);
+    
+    int originx = sourceRect.x();
+    int destx = destPoint.x() + sourceRect.x();
+    ASSERT(destx >= 0);
+    ASSERT(destx < m_size.width());
+    ASSERT(originx >= 0);
+    ASSERT(originx <= sourceRect.right());
+    
+    int endx = destPoint.x() + sourceRect.right();
+    ASSERT(endx <= m_size.width());
+    
+    int numColumns = endx - destx;
+    
+    int originy = sourceRect.y();
+    int desty = destPoint.y() + sourceRect.y();
+    ASSERT(desty >= 0);
+    ASSERT(desty < m_size.height());
+    ASSERT(originy >= 0);
+    ASSERT(originy <= sourceRect.bottom());
+    
+    int endy = destPoint.y() + sourceRect.bottom();
+    ASSERT(endy <= m_size.height());
+    int numRows = endy - desty;
+    
+    unsigned srcBytesPerRow = 4 * source->width();
+    unsigned dstPixelsPerRow = dst.rowBytesAsPixels();
+    
+    unsigned char* srcRows = source->data()->data().data() + originy * srcBytesPerRow + originx * 4;
+    SkPMColor* dstRows = dst.getAddr32(destx, desty);
+    for (int y = 0; y < numRows; ++y) {
+        for (int x = 0; x < numColumns; x++) {
+            int basex = x * 4;
+            dstRows[x] = SkPackARGB32(srcRows[basex + 3],
+                                      srcRows[basex + 0],
+                                      srcRows[basex + 1],
+                                      srcRows[basex + 2]);
+        }
+        dstRows += dstPixelsPerRow;
+        srcRows += srcBytesPerRow;
+    }
+}
+
+    
+String ImageBuffer::toDataURL(const String&) const
+{
+    // leaving this unimplemented, until I understand what its for (and what it
+    // really is).
+    return "data:,";    // I think this means we couldn't make the data url
+}
+
+}