Merge "Change texture transformation group to have elliptical round rects" into sc-dev

                                     0.f,  0.7f, 0.f, 0.f,

                                     0.f,   0.f, 1.f, 0.f,

                                   67.3f, 52.2f, 0.f, 1.f);

const auto kScaleYOnly = mat4(1.f,   0.f, 0.f, 0.f,

                              0.f,  0.7f, 0.f, 0.f,

                              0.f,   0.f, 1.f, 0.f,

                              0.f,   0.f, 0.f, 1.f);

// clang-format on

// When setting layer.sourceDataspace, whether it matches the destination or not determines whether

// a color correction effect is added to the shader.

    }

}

static void drawTextureScaleLayers(SkiaRenderEngine* renderengine, const DisplaySettings& display,

// The unique feature of these layers is that the boundary is slightly smaller than the rounded

// rect crop, so the rounded edges intersect that boundary and require a different clipping method.

static void drawClippedLayers(SkiaRenderEngine* renderengine, const DisplaySettings& display,

                              const std::shared_ptr<ExternalTexture>& dstTexture,

                              const std::shared_ptr<ExternalTexture>& srcTexture) {

    const Rect& displayRect = display.physicalDisplay;

    FloatRect rect(0, 0, displayRect.width(), displayRect.height());

    FloatRect rect(0, 0, displayRect.width(), displayRect.height() - 20); // boundary is smaller

    // clang-format off

    const auto symmetric = mat4(0.9f, 0.f,  0.f, 0.f,

                                0.f,  0.9f, 0.f, 0.f,

                                0.f,  0.f,  1.f, 0.f,

                                8.8f, 8.1f, 0.f, 1.f);

    const auto asymmetric = mat4(0.9f, 0.f,  0.f, 0.f,

                                 0.f,  0.7f, 0.f, 0.f,

                                 0.f,  0.f,  1.f, 0.f,

                                 8.8f, 8.1f, 0.f, 1.f);

    // clang-format on

    LayerSettings layer{

            .geometry =

                    Geometry{

                            .boundaries = rect,

                            .roundedCornersCrop = rect,

                            .positionTransform = kScaleAndTranslate,

                            .roundedCornersRadius = 300,

                            .roundedCornersRadius = 27, // larger than the 20 above.

                            .roundedCornersCrop =

                                    FloatRect(0, 0, displayRect.width(), displayRect.height()),

                    },

            .source = PixelSource{.buffer =

                                          Buffer{

                                                  .buffer = srcTexture,

                                                  .isOpaque = 0,

                                                  .maxLuminanceNits = 1000.f,

                                                  .textureTransform = kScaleYOnly,

                                          }},

            .sourceDataspace = kOtherDataSpace,

    };

    auto layers = std::vector<const LayerSettings*>{&layer};

    for (auto transform : {symmetric, asymmetric}) {

        layer.geometry.positionTransform = transform;

        // In real use, I saw alpha of 1.0 and 0.999, probably a mistake, but cache both shaders.

        for (float alpha : {0.5f, 1.f}) {

            layer.alpha = alpha,

            renderengine->drawLayers(display, layers, dstTexture, kUseFrameBufferCache,

                                     base::unique_fd(), nullptr);

        }

    }

}

//

// The collection of shaders cached here were found by using perfetto to record shader compiles

        drawImageLayers(renderengine, display, dstTexture, externalTexture);

        // Draw layers for b/185569240.

        drawTextureScaleLayers(renderengine, display, dstTexture, externalTexture);

        drawClippedLayers(renderengine, display, dstTexture, externalTexture);

        const nsecs_t timeAfter = systemTime();

        const float compileTimeMs = static_cast<float>(timeAfter - timeBefore) / 1.0E6;