[HWUI] Implement legacy color mode.

Previously, HWUI always produces SRGB buffers. We introduced new APIs for
SurfaceFlinger, a.k.a. the composer service to return to composition preference
for data space, and pixel format. This patch makes HWUI query composition
preference from composer service, and creates the corresponding EGL surface
with the correct attributes.

In legacy mode, HWUI will take the pixel value from source color space, and
interpret it as pixel value in destination color space.

BUG: 111436479
BUG: 113530681
Test: Build, flash, boot and check dumpsys SurfaceFlinger
Change-Id: I64562d5ea6f653076c8b448feb56b5e0624bc81c

1 files changed, 18 insertions, 10 deletions

diff --git a/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.cpp b/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.cpp
index d58b59e83380..26f01cecf802 100644
--- a/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.cpp
+++ b/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.cpp
@@ -62,21 +62,23 @@ Frame SkiaOpenGLPipeline::getFrame() {
 bool SkiaOpenGLPipeline::draw(const Frame& frame, const SkRect& screenDirty, const SkRect& dirty,
                               const LightGeometry& lightGeometry,
                               LayerUpdateQueue* layerUpdateQueue, const Rect& contentDrawBounds,
-                              bool opaque, bool wideColorGamut, const LightInfo& lightInfo,
+                              bool opaque, const LightInfo& lightInfo,
                               const std::vector<sp<RenderNode>>& renderNodes,
                               FrameInfoVisualizer* profiler) {
     mEglManager.damageFrame(frame, dirty);
 
-    SkColorType colorType;
+    SkColorType colorType = getSurfaceColorType();
     // setup surface for fbo0
     GrGLFramebufferInfo fboInfo;
     fboInfo.fFBOID = 0;
-    if (wideColorGamut) {
+    if (colorType == kRGBA_F16_SkColorType) {
         fboInfo.fFormat = GL_RGBA16F;
-        colorType = kRGBA_F16_SkColorType;
-    } else {
+    } else if (colorType == kN32_SkColorType) {
+        // Note: The default preference of pixel format is RGBA_8888, when other
+        // pixel format is available, we should branch out and do more check.
         fboInfo.fFormat = GL_RGBA8;
-        colorType = kN32_SkColorType;
+    } else {
+        LOG_ALWAYS_FATAL("Unsupported color type.");
     }
 
     GrBackendRenderTarget backendRT(frame.width(), frame.height(), 0, STENCIL_BUFFER_SIZE, fboInfo);
@@ -89,8 +91,7 @@ bool SkiaOpenGLPipeline::draw(const Frame& frame, const SkRect& screenDirty, con
             nullptr, &props));
 
     SkiaPipeline::updateLighting(lightGeometry, lightInfo);
-    renderFrame(*layerUpdateQueue, dirty, renderNodes, opaque, wideColorGamut, contentDrawBounds,
-                surface);
+    renderFrame(*layerUpdateQueue, dirty, renderNodes, opaque, contentDrawBounds, surface);
     layerUpdateQueue->clear();
 
     // Draw visual debugging features
@@ -147,8 +148,7 @@ bool SkiaOpenGLPipeline::setSurface(Surface* surface, SwapBehavior swapBehavior,
 
     if (surface) {
         mRenderThread.requireGlContext();
-        const bool wideColorGamut = colorMode == ColorMode::WideColorGamut;
-        mEglSurface = mEglManager.createSurface(surface, wideColorGamut);
+        mEglSurface = mEglManager.createSurface(surface, colorMode);
     }
 
     if (mEglSurface != EGL_NO_SURFACE) {
@@ -168,6 +168,14 @@ bool SkiaOpenGLPipeline::isContextReady() {
     return CC_LIKELY(mEglManager.hasEglContext());
 }
 
+SkColorType SkiaOpenGLPipeline::getSurfaceColorType() const {
+    return mEglManager.getSurfaceColorType();
+}
+
+sk_sp<SkColorSpace> SkiaOpenGLPipeline::getSurfaceColorSpace() {
+    return mEglManager.getSurfaceColorSpace();
+}
+
 void SkiaOpenGLPipeline::invokeFunctor(const RenderThread& thread, Functor* functor) {
     DrawGlInfo::Mode mode = DrawGlInfo::kModeProcessNoContext;
     if (thread.eglManager().hasEglContext()) {