void TextureBlur::create(Texture2D* target, const int radius, const std::string& fileName, std::function<void()> callback, const int step)
{
CCASSERT(target != nullptr, "Null pointer passed as a texture to blur");
CCASSERT(radius <= maxRadius, "Blur radius is too big");
CCASSERT(radius > 0, "Blur radius is too small");
CCASSERT(!fileName.empty(), "File name can not be empty");
CCASSERT(step <= radius/2 + 1 , "Step is too big");
CCASSERT(step > 0 , "Step is too small");
Size textureSize = target->getContentSize();
Vec2 pixelSize = Vec2(float(step)/textureSize.width, float(step)/textureSize.height);
int radiusWithStep = radius/step;
float* weights = new float[maxRadius];
calculateGaussianWeights(radiusWithStep, weights);
Sprite* stepX = CCSprite::createWithTexture(target);
stepX->retain();
stepX->setPosition(Point(0.5f*textureSize.width, 0.5f*textureSize.height));
stepX->setFlippedY(true);
GLProgram* blurX = getBlurShader(pixelSize, Vec2(1.0f, 0.0f), radiusWithStep, weights);
stepX->setGLProgram(blurX);
RenderTexture* rtX = RenderTexture::create(textureSize.width, textureSize.height);
rtX->retain();
rtX->begin();
stepX->visit();
rtX->end();
Sprite* stepY = CCSprite::createWithTexture(rtX->getSprite()->getTexture());
stepY->retain();
stepY->setPosition(Point(0.5f*textureSize.width, 0.5f*textureSize.height));
stepY->setFlippedY(true);
GLProgram* blurY = getBlurShader(pixelSize, Vec2(0.0f, 1.0f), radiusWithStep, weights);
stepY->setGLProgram(blurY);
RenderTexture* rtY = RenderTexture::create(textureSize.width, textureSize.height);
rtY->retain();
rtY->begin();
stepY->visit();
rtY->end();
auto completionCallback = [rtX, rtY, stepX, stepY, callback](RenderTexture* rt, const std::string& filename)
{
stepX->release();
stepY->release();
rtX->release();
rtY->release();
callback();
};
rtY->saveToFile(fileName, true, completionCallback);
}
MapRender::~MapRender()
{
for (size_t i = 0; i < MAX_TEX_X; i++)
{
for (size_t j = 0; j < MAX_TEX_Y; j++)
{
RenderTexture* tex = _renderTexture[i][j];
if (tex) tex->release();
}
}
}
