/*
 * Copyright 2011, 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.
 */

#define LOG_TAG "RasterRenderer"
#define LOG_NDEBUG 1

#include "config.h"
#include "RasterRenderer.h"

#if USE(ACCELERATED_COMPOSITING)

#include "AndroidLog.h"
#include "GLUtils.h"
#include "SkBitmap.h"
#include "SkBitmapRef.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "Tile.h"
#include "TilesManager.h"

namespace WebCore {

SkBitmap* RasterRenderer::g_bitmap = 0;

RasterRenderer::RasterRenderer() : BaseRenderer(BaseRenderer::Raster)
{
#ifdef DEBUG_COUNT
    ClassTracker::instance()->increment("RasterRenderer");
#endif
    if (!g_bitmap) {
        g_bitmap = new SkBitmap();
        g_bitmap->setConfig(SkBitmap::kARGB_8888_Config,
                           TilesManager::instance()->tileWidth(),
                           TilesManager::instance()->tileHeight());
        g_bitmap->allocPixels();
    }
}

RasterRenderer::~RasterRenderer()
{
#ifdef DEBUG_COUNT
    ClassTracker::instance()->decrement("RasterRenderer");
#endif
}

void RasterRenderer::setupCanvas(const TileRenderInfo& renderInfo, SkCanvas* canvas)
{
    if (renderInfo.baseTile->isLayerTile()) {
        g_bitmap->setIsOpaque(false);
        g_bitmap->eraseARGB(0, 0, 0, 0);
    } else {
        Color defaultBackground = Color::white;
        Color* background = renderInfo.tilePainter->background();
        if (!background) {
            ALOGV("No background color for base layer!");
            background = &defaultBackground;
        }
        ALOGV("setupCanvas use background on Base Layer %x", background->rgb());
        g_bitmap->setIsOpaque(!background->hasAlpha());
        g_bitmap->eraseARGB(background->alpha(), background->red(),
                            background->green(), background->blue());
    }

    SkDevice* device = new SkDevice(*g_bitmap);

    canvas->setDevice(device);

    device->unref();

    // If we have a partially painted bitmap
    if (renderInfo.invalRect) {
        SkRect clipRect = SkRect::MakeWH(renderInfo.invalRect->width(),
                                         renderInfo.invalRect->height());
        // ensure the canvas origin is translated to the coordinates of our inval rect
        canvas->clipRect(clipRect);
        canvas->translate(-renderInfo.invalRect->fLeft, -renderInfo.invalRect->fTop);
    }
}

void RasterRenderer::renderingComplete(const TileRenderInfo& renderInfo, SkCanvas* canvas)
{
    const SkBitmap& bitmap = canvas->getDevice()->accessBitmap(false);
    GLUtils::paintTextureWithBitmap(&renderInfo, bitmap);
}

void RasterRenderer::checkForPureColor(TileRenderInfo& renderInfo, SkCanvas* canvas)
{
    renderInfo.isPureColor = GLUtils::isPureColorBitmap(*g_bitmap, renderInfo.pureColor);
}

} // namespace WebCore

#endif // USE(ACCELERATED_COMPOSITING)