Plumb support for rendering A8 in Vulkan

VulkanSurface:
- update LOG_TAG
- allow no dataspace + A8
- assign a vkPixelFormat for A8

VulkanManager: use a more descriptive LOG_TAG

Bug: 193170859
Test: TODO

Change-Id: If447c2c393b4f17b718083a77cdd29870fb1cc50

libs/hwui/renderthread/VulkanManager.cpp

@@ -35,6 +35,9 @@
 #include "pipeline/skia/ShaderCache.h"
 #include "renderstate/RenderState.h"
 
+#undef LOG_TAG
+#define LOG_TAG "VulkanManager"
+
 namespace android {
 namespace uirenderer {
 namespace renderthread {

libs/hwui/renderthread/VulkanSurface.cpp

@@ -24,6 +24,9 @@
 #include "VulkanManager.h"
 #include "utils/Color.h"
 
+#undef LOG_TAG
+#define LOG_TAG "VulkanSurface"
+
 namespace android {
 namespace uirenderer {
 namespace renderthread {
@@ -197,8 +200,9 @@ bool VulkanSurface::InitializeWindowInfoStruct(ANativeWindow* window, ColorMode
     outWindowInfo->bufferFormat = ColorTypeToBufferFormat(colorType);
     outWindowInfo->colorspace = colorSpace;
     outWindowInfo->dataspace = ColorSpaceToADataSpace(colorSpace.get(), colorType);
-    LOG_ALWAYS_FATAL_IF(outWindowInfo->dataspace == HAL_DATASPACE_UNKNOWN,
-                        "Unsupported colorspace");
+    LOG_ALWAYS_FATAL_IF(
+            outWindowInfo->dataspace == HAL_DATASPACE_UNKNOWN && colorType != kAlpha_8_SkColorType,
+            "Unsupported colorspace");
 
     VkFormat vkPixelFormat;
     switch (colorType) {
@@ -211,6 +215,9 @@ bool VulkanSurface::InitializeWindowInfoStruct(ANativeWindow* window, ColorMode
         case kRGBA_1010102_SkColorType:
             vkPixelFormat = VK_FORMAT_A2B10G10R10_UNORM_PACK32;
             break;
+        case kAlpha_8_SkColorType:
+            vkPixelFormat = VK_FORMAT_R8_UNORM;
+            break;
         default:
             LOG_ALWAYS_FATAL("Unsupported colorType: %d", (int)colorType);
     }