Take the ceil() of the width and height of the new render target.

This was removed in ag/31004652 by mistake and might be causing the null pointer exception in 387410516.

Also re-enable setting blur algorithm to KAWASE for testing.

Bug: 387410516
Test: atest BlurTests
Flag: com.android.graphics.surfaceflinger.flags.window_blur_kawase2
Change-Id: I08e53b1eac4f649a76afc21881609fe6abd2337b

Author: Shan Huang

libs/renderengine/skia/filters/KawaseBlurDualFilter.cpp

@@ -118,9 +118,12 @@ sk_sp<SkImage> KawaseBlurDualFilter::generate(SkiaGpuContext* context, const uin
     const int filterPasses = std::min(kMaxSurfaces - 1, static_cast<int>(ceil(filterDepth)));
 
     auto makeSurface = [&](float scale) -> sk_sp<SkSurface> {
-        const auto newW = static_cast<float>(blurRect.width() / scale);
-        const auto newH = static_cast<float>(blurRect.height() / scale);
-        return context->createRenderTarget(input->imageInfo().makeWH(newW, newH));
+        const auto newW = ceil(static_cast<float>(blurRect.width() / scale));
+        const auto newH = ceil(static_cast<float>(blurRect.height() / scale));
+        sk_sp<SkSurface> surface =
+                context->createRenderTarget(input->imageInfo().makeWH(newW, newH));
+        LOG_ALWAYS_FATAL_IF(!surface, "%s: Failed to create surface for blurring!", __func__);
+        return surface;
     };
 
     // Render into surfaces downscaled by 1x, 2x, and 4x from the initial downscale.

services/surfaceflinger/SurfaceFlinger.cpp

@@ -879,6 +879,8 @@ renderengine::RenderEngine::BlurAlgorithm chooseBlurAlgorithm(bool supportsBlur)
         return renderengine::RenderEngine::BlurAlgorithm::GAUSSIAN;
     } else if (algorithm == "kawase2") {
         return renderengine::RenderEngine::BlurAlgorithm::KAWASE_DUAL_FILTER;
+    } else if (algorithm == "kawase") {
+        return renderengine::RenderEngine::BlurAlgorithm::KAWASE;
     } else {
         if (FlagManager::getInstance().window_blur_kawase2()) {
             return renderengine::RenderEngine::BlurAlgorithm::KAWASE_DUAL_FILTER;