1 files changed, 237 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/android/BaseTileTexture.cpp b/Source/WebCore/platform/graphics/android/BaseTileTexture.cpp
new file mode 100644
index 0000000..ee8cebf
--- /dev/null
+++ b/Source/WebCore/platform/graphics/android/BaseTileTexture.cpp
@@ -0,0 +1,237 @@
+/*
+ * Copyright 2010, 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 THE COPYRIGHT OWNER 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 "BaseTileTexture.h"
+
+#include "BaseTile.h"
+#include "ClassTracker.h"
+#include "DeleteTextureOperation.h"
+#include "GLUtils.h"
+#include "TilesManager.h"
+
+#define LOG_NDEBUG 1
+#define LOG_TAG "BaseTileTexture.cpp"
+#include <utils/Log.h>
+
+namespace WebCore {
+
+BaseTileTexture::BaseTileTexture(uint32_t w, uint32_t h)
+    : DoubleBufferedTexture(eglGetCurrentContext(), SurfaceTextureMode)
+    , m_usedLevel(-1)
+    , m_owner(0)
+    , m_delayedReleaseOwner(0)
+    , m_delayedRelease(false)
+    , m_busy(false)
+{
+    m_size.set(w, h);
+
+#ifdef DEBUG_COUNT
+    ClassTracker::instance()->increment("BaseTileTexture");
+#endif
+}
+
+BaseTileTexture::~BaseTileTexture()
+{
+    if (m_sharedTextureMode == EglImageMode) {
+        SharedTexture* textures[3] = { m_textureA, m_textureB, 0 };
+        destroyTextures(textures);
+    }
+#ifdef DEBUG_COUNT
+    ClassTracker::instance()->decrement("BaseTileTexture");
+#endif
+}
+
+void BaseTileTexture::destroyTextures(SharedTexture** textures)
+{
+    int x = 0;
+    while (textures[x]) {
+        // We need to delete the source texture and EGLImage in the texture
+        // generation thread. In theory we should be able to delete the EGLImage
+        // from either thread, but it currently throws an error if not deleted
+        // in the same EGLContext from which it was created.
+        textures[x]->lock();
+        DeleteTextureOperation* operation = new DeleteTextureOperation(
+            textures[x]->getSourceTextureId(), textures[x]->getEGLImage());
+        textures[x]->unlock();
+        TilesManager::instance()->scheduleOperation(operation);
+        x++;
+    }
+}
+
+TextureInfo* BaseTileTexture::producerLock()
+{
+    m_busyLock.lock();
+    m_busy = true;
+    m_busyLock.unlock();
+    return DoubleBufferedTexture::producerLock();
+}
+
+void BaseTileTexture::producerRelease()
+{
+    DoubleBufferedTexture::producerRelease();
+    setNotBusy();
+}
+
+void BaseTileTexture::producerReleaseAndSwap()
+{
+    DoubleBufferedTexture::producerReleaseAndSwap();
+    setNotBusy();
+}
+
+void BaseTileTexture::setNotBusy()
+{
+    android::Mutex::Autolock lock(m_busyLock);
+    m_busy = false;
+    if (m_delayedRelease) {
+        if (m_owner == m_delayedReleaseOwner)
+            m_owner = 0;
+
+        m_delayedRelease = false;
+        m_delayedReleaseOwner = 0;
+    }
+    m_busyCond.signal();
+}
+
+bool BaseTileTexture::busy()
+{
+    android::Mutex::Autolock lock(m_busyLock);
+    return m_busy;
+}
+
+void BaseTileTexture::producerUpdate(TextureInfo* textureInfo, const SkBitmap& bitmap)
+{
+    // no need to upload a texture since the bitmap is empty
+    if (!bitmap.width() && !bitmap.height()) {
+        producerRelease();
+        return;
+    }
+
+    GLUtils::paintTextureWithBitmap(textureInfo, m_size, bitmap, 0, 0);
+
+    producerReleaseAndSwap();
+}
+
+bool BaseTileTexture::acquire(TextureOwner* owner, bool force)
+{
+    if (m_owner == owner) {
+        if (m_delayedRelease) {
+            m_delayedRelease = false;
+            m_delayedReleaseOwner = 0;
+        }
+        return true;
+    }
+
+    return setOwner(owner, force);
+}
+
+bool BaseTileTexture::tryAcquire(TextureOwner* owner, TiledPage* currentPage, TiledPage* nextPage)
+{
+    m_busyLock.lock();
+    if (!m_busy
+        && m_owner
+        && m_owner->page() != currentPage
+        && m_owner->page() != nextPage) {
+        m_busyLock.unlock();
+        return this->acquire(owner);
+    }
+    m_busyLock.unlock();
+    return false;
+}
+
+bool BaseTileTexture::setOwner(TextureOwner* owner, bool force)
+{
+    // if the writable texture is busy (i.e. currently being written to) then we
+    // can't change the owner out from underneath that texture
+    m_busyLock.lock();
+    while (m_busy && force)
+        m_busyCond.wait(m_busyLock);
+    bool busy = m_busy;
+    m_busyLock.unlock();
+
+    if (!busy) {
+        // if we are not busy we can try to remove the texture from the layer;
+        // LayerAndroid::removeTexture() is protected by the same lock as
+        // LayerAndroid::paintBitmapGL(), so either we execute removeTexture()
+        // first and paintBitmapGL() will bail out, or we execute it after,
+        // and paintBitmapGL() will mark the texture as busy before
+        // relinquishing the lock. LayerAndroid::removeTexture() will call
+        // BaseTileTexture::release(), which will then do nothing
+        // if the texture is busy and we then don't return true.
+        bool proceed = true;
+        if (m_owner && m_owner != owner)
+            proceed = m_owner->removeTexture(this);
+
+        if (proceed) {
+            m_owner = owner;
+            return true;
+        }
+    }
+    return false;
+}
+
+bool BaseTileTexture::release(TextureOwner* owner)
+{
+    android::Mutex::Autolock lock(m_busyLock);
+    if (m_owner != owner)
+        return false;
+
+    if (!m_busy) {
+        m_owner = 0;
+    } else {
+        m_delayedRelease = true;
+        m_delayedReleaseOwner = owner;
+    }
+    return true;
+}
+
+void BaseTileTexture::setTile(TextureInfo* info, int x, int y,
+                                          float scale, unsigned int pictureCount)
+{
+    TextureTileInfo* textureInfo = m_texturesInfo.get(getWriteableTexture());
+    if (!textureInfo) {
+        textureInfo = new TextureTileInfo();
+    }
+    textureInfo->m_x = x;
+    textureInfo->m_y = y;
+    textureInfo->m_scale = scale;
+    textureInfo->m_picture = pictureCount;
+    m_texturesInfo.set(getWriteableTexture(), textureInfo);
+}
+
+bool BaseTileTexture::readyFor(BaseTile* baseTile)
+{
+    TextureTileInfo* info = m_texturesInfo.get(getReadableTexture());
+    if (info &&
+        (info->m_x == baseTile->x()) &&
+        (info->m_y == baseTile->y()) &&
+        (info->m_scale == baseTile->scale()) &&
+        (info->m_picture == baseTile->lastPaintedPicture())) {
+        return true;
+    }
+    return false;
+}
+
+} // namespace WebCore