[HWUI] Remove hardcoding around wide color gamut.

Previously we hardcode wide color gamut in HWUI as scRGB color space with FP16
pixel format. However, the hardware composer doesn't support this combination.
This patch plumbs wide color gamut composition preference from composer API to
HWUI such that HWUI can now pick the combination of color space and pixel
format for the surface.

BUG: 111436479
Test: Build, flash and boot, verify with a demo app.
Change-Id: I7a8b4d8deca72ef40069dba9d23a3f5e90dbfe5a

1 files changed, 46 insertions, 0 deletions

diff --git a/libs/hwui/DeviceInfo.cpp b/libs/hwui/DeviceInfo.cpp
index 0b9d82b105a3..ed167e57158e 100644
--- a/libs/hwui/DeviceInfo.cpp
+++ b/libs/hwui/DeviceInfo.cpp
@@ -20,6 +20,7 @@
 
 #include <gui/ISurfaceComposer.h>
 #include <gui/SurfaceComposerClient.h>
+#include <ui/GraphicTypes.h>
 
 #include <mutex>
 #include <thread>
@@ -61,6 +62,50 @@ DisplayInfo QueryDisplayInfo() {
     return displayInfo;
 }
 
+static void queryWideColorGamutPreference(SkColorSpace::Gamut* colorGamut,
+                                          sk_sp<SkColorSpace>* colorSpace, SkColorType* colorType) {
+    if (Properties::isolatedProcess) {
+        *colorGamut = SkColorSpace::Gamut::kSRGB_Gamut;
+        *colorSpace = SkColorSpace::MakeSRGB();
+        *colorType = SkColorType::kN32_SkColorType;
+        return;
+    }
+    ui::Dataspace defaultDataspace, wcgDataspace;
+    ui::PixelFormat defaultPixelFormat, wcgPixelFormat;
+    status_t status =
+        SurfaceComposerClient::getCompositionPreference(&defaultDataspace, &defaultPixelFormat,
+                                                        &wcgDataspace, &wcgPixelFormat);
+    LOG_ALWAYS_FATAL_IF(status, "Failed to get composition preference, error %d", status);
+    switch (wcgDataspace) {
+        case ui::Dataspace::DISPLAY_P3:
+            *colorGamut = SkColorSpace::Gamut::kDCIP3_D65_Gamut;
+            *colorSpace = SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma,
+                                                SkColorSpace::Gamut::kDCIP3_D65_Gamut);
+            break;
+        case ui::Dataspace::V0_SCRGB:
+            *colorGamut = SkColorSpace::Gamut::kSRGB_Gamut;
+            *colorSpace = SkColorSpace::MakeSRGB();
+            break;
+        case ui::Dataspace::V0_SRGB:
+            // when sRGB is returned, it means wide color gamut is not supported.
+            *colorGamut = SkColorSpace::Gamut::kSRGB_Gamut;
+            *colorSpace = SkColorSpace::MakeSRGB();
+            break;
+        default:
+            LOG_ALWAYS_FATAL("Unreachable: unsupported wide color space.");
+    }
+    switch (wcgPixelFormat) {
+        case ui::PixelFormat::RGBA_8888:
+            *colorType = SkColorType::kN32_SkColorType;
+            break;
+        case ui::PixelFormat::RGBA_FP16:
+            *colorType = SkColorType::kRGBA_F16_SkColorType;
+            break;
+        default:
+            LOG_ALWAYS_FATAL("Unreachable: unsupported pixel format.");
+    }
+}
+
 DeviceInfo::DeviceInfo() {
 #if HWUI_NULL_GPU
         mMaxTextureSize = NULL_GPU_MAX_TEXTURE_SIZE;
@@ -68,6 +113,7 @@ DeviceInfo::DeviceInfo() {
         mMaxTextureSize = -1;
 #endif
     mDisplayInfo = QueryDisplayInfo();
+    queryWideColorGamutPreference(&mWideColorGamut, &mWideColorSpace, &mWideColorType);
 }
 
 int DeviceInfo::maxTextureSize() const {