C++ ShaderProgram::drawQuad方法代码示例

void VideoLayerAndroid::showPreparingAnimation(const SkRect& rect,
                                               const SkRect innerRect)
{
    ShaderProgram* shader = TilesManager::instance()->shader();
    VideoLayerManager* manager = TilesManager::instance()->videoLayerManager();
    // Paint the video content's background.
    PureColorQuadData backGroundQuadData(Color(128, 128, 128, 255), LayerQuad,
                                         &m_drawTransform, &rect);
    shader->drawQuad(&backGroundQuadData);

    TransformationMatrix addReverseRotation;
    TransformationMatrix addRotation = m_drawTransform;
    addRotation.translate(innerRect.fLeft, innerRect.fTop);
    double halfButtonSize = manager->getButtonSize() / 2;
    addRotation.translate(halfButtonSize, halfButtonSize);
    addReverseRotation = addRotation;
    addRotation.rotate(m_rotateDegree);
    addRotation.translate(-halfButtonSize, -halfButtonSize);

    SkRect size = SkRect::MakeWH(innerRect.width(), innerRect.height());

    TextureQuadData spinnerQuadData(manager->getSpinnerOuterTextureId(),
                                    GL_TEXTURE_2D, GL_LINEAR,
                                    LayerQuad, &addRotation, &size);
    shader->drawQuad(&spinnerQuadData);

    addReverseRotation.rotate(-m_rotateDegree);
    addReverseRotation.translate(-halfButtonSize, -halfButtonSize);

    spinnerQuadData.updateTextureId(manager->getSpinnerInnerTextureId());
    spinnerQuadData.updateDrawMatrix(&addReverseRotation);
    shader->drawQuad(&spinnerQuadData);

    m_rotateDegree += ROTATESTEP;
}

/*
//Seems a SAMSUNG change BEGIN
bool VideoLayerAndroid::captureImage(PlatformWebGLVideoTexture* tex, VideoImageCallback callback)
{
    if (m_playerState == PLAYING && m_surfaceTexture.get()) {
		Locker<WTF::Mutex> lock(m_mutexRef->mutex);
		bool ret = (tex->*callback)(m_surfaceTexture);
		glFinish();
		return ret;
	}
	return false;
}
//Seems a SAMSUNG change END
*/
bool VideoLayerAndroid::drawGL(bool layerTilesDisabled)
{
    // Lazily allocated the textures.
    TilesManager* tilesManager = TilesManager::instance();
    VideoLayerManager* manager = tilesManager->videoLayerManager();
    manager->initGLResourcesIfNeeded();

    ShaderProgram* shader = tilesManager->shader();

    SkRect rect = SkRect::MakeSize(getSize());
    GLfloat surfaceMatrix[16];

    // Calculate the video rect based on the aspect ratio and the element rect.
    SkRect videoRect = calVideoRect(rect);
    PureColorQuadData pureColorQuadData(Color(0, 0, 0, 255), LayerQuad,
                                        &m_drawTransform, &rect);

    if (videoRect != rect) {
        // Paint the whole video element with black color when video content
        // can't cover the whole area.
        shader->drawQuad(&pureColorQuadData);
    }

    // Inner rect is for the progressing / play / pause animation.
    SkRect innerRect = SkRect::MakeWH(manager->getButtonSize(),
                                      manager->getButtonSize());
    if (innerRect.contains(videoRect))
        innerRect = videoRect;
    double buttonSize = manager->getButtonSize();
    innerRect.offset(videoRect.fLeft + (videoRect.width() - buttonSize) / 2,
                     videoRect.fTop + (videoRect.height() - buttonSize) / 2);

    // When we are drawing the animation of the play/pause button in the
    // middle of the video, we need to ask for redraw.
    bool needRedraw = false;
    TextureQuadData iconQuadData(0, GL_TEXTURE_2D, GL_LINEAR, LayerQuad,
                                 &m_drawTransform, &innerRect);
    // Draw the poster image, the progressing image or the Video depending
    // on the player's state.
    if (m_playerState == PREPARING) {
        // Show the progressing animation, with two rotating circles
        showPreparingAnimation(videoRect, innerRect);
        needRedraw = true;
    } else if (m_playerState == PLAYING && m_surfaceTexture.get()) {
        // Show the real video.
		Locker<WTF::Mutex> lock(m_mutexRef->mutex);//Seems a SAMSUNG change
        m_surfaceTexture->updateTexImage();
        m_surfaceTexture->getTransformMatrix(surfaceMatrix);
        GLuint textureId = manager->getTextureId(uniqueId());
        shader->drawVideoLayerQuad(m_drawTransform, surfaceMatrix,
                                   videoRect, textureId);
        manager->updateMatrix(uniqueId(), surfaceMatrix);

        // Use the scale to control the fading the sizing during animation
        double scale = manager->drawIcon(uniqueId(), PlayIcon);
        if (scale) {
            innerRect.inset(manager->getButtonSize() / 4 * scale,
                            manager->getButtonSize() / 4 * scale);
            iconQuadData.updateTextureId(manager->getPlayTextureId());
            iconQuadData.updateOpacity(scale);
            shader->drawQuad(&iconQuadData);
            needRedraw = true;
        }
		glFinish(); //we can look probably at using a fence here //Seems a SAMSUNG change
    } else {
        GLuint textureId = manager->getTextureId(uniqueId());
        GLfloat* matrix = manager->getMatrix(uniqueId());
        if (textureId && matrix) {
            // Show the screen shot for each video.
            shader->drawVideoLayerQuad(m_drawTransform, matrix,
                                       videoRect, textureId);
        } else {
            // Show the static poster b/c there is no screen shot available.
            pureColorQuadData.updateColor(Color(128, 128, 128, 255));
            shader->drawQuad(&pureColorQuadData);

            iconQuadData.updateTextureId(manager->getPosterTextureId());
            iconQuadData.updateOpacity(1.0);
            shader->drawQuad(&iconQuadData);
        }

        // Use the scale to control the fading and the sizing during animation.
        double scale = manager->drawIcon(uniqueId(), PauseIcon);
        if (scale) {
            innerRect.inset(manager->getButtonSize() / 4 * scale,
                            manager->getButtonSize() / 4 * scale);
//.........这里部分代码省略.........