Merge "Performance fixes and additional logging for RE Blur."

 * limitations under the License.

 */

#define ATRACE_TAG ATRACE_TAG_GRAPHICS

#include "BlurFilter.h"

#include <SkCanvas.h>

#include <SkData.h>

        half4 main(float2 xy) {

            float2 scaled_xy = float2(xy.x * in_inverseScale, xy.y * in_inverseScale);

            float4 c = float4(sample(input, scaled_xy));

            c += float4(sample(input, scaled_xy + float2( in_blurOffset.x,  in_blurOffset.y)));

            c += float4(sample(input, scaled_xy + float2( in_blurOffset.x, -in_blurOffset.y)));

            c += float4(sample(input, scaled_xy + float2(-in_blurOffset.x,  in_blurOffset.y)));

            c += float4(sample(input, scaled_xy + float2(-in_blurOffset.x, -in_blurOffset.y)));

            half4 c = sample(input, scaled_xy);

            c += sample(input, scaled_xy + float2( in_blurOffset.x,  in_blurOffset.y));

            c += sample(input, scaled_xy + float2( in_blurOffset.x, -in_blurOffset.y));

            c += sample(input, scaled_xy + float2(-in_blurOffset.x,  in_blurOffset.y));

            c += sample(input, scaled_xy + float2(-in_blurOffset.x, -in_blurOffset.y));

            return half4(c.rgb * 0.2, 1.0);

        }

sk_sp<SkSurface> BlurFilter::generate(SkCanvas* canvas, const sk_sp<SkSurface> input,

                                      const uint32_t blurRadius, SkRect rect) const {

    ATRACE_CALL();

    // Kawase is an approximation of Gaussian, but it behaves differently from it.

    // A radius transformation is required for approximating them, and also to introduce

    // non-integer steps, necessary to smoothly interpolate large radii.

        }

        lastDrawTarget = readSurface;

    }

    {

        ATRACE_NAME("Flush Offscreen Surfaces");

        lastDrawTarget->flushAndSubmit();

    }

    return lastDrawTarget;

}