SF: Redesign API to query display information

The DisplayInfo list returned by ISurfaceComposer for display configs
contains display information/state redundant across configs.

Extract config information to DisplayConfig, and repurpose DisplayInfo
for immutable information about a physical display. In a future CL, SF
will populate DisplayInfo with additional data (e.g. connection type,
EDID fields) on initial connection. DisplayConfigs retain the ability
to reload on subsequent connections. Introduce ui::DisplayState for
transactional state applicable to both physical and virtual displays.

Bug: 144601064
Test: dumpsys display
Change-Id: I72003e8ef71483ef483d0de85d28b859a6c9f5fc

1 files changed, 9 insertions, 10 deletions

diff --git a/cmds/flatland/GLHelper.cpp b/cmds/flatland/GLHelper.cpp
index d398559ee8..3a3df08534 100644
--- a/cmds/flatland/GLHelper.cpp
+++ b/cmds/flatland/GLHelper.cpp
@@ -14,15 +14,14 @@
  * limitations under the License.
  */
 
+#include "GLHelper.h"
+
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
-
-#include <ui/DisplayInfo.h>
 #include <gui/SurfaceComposerClient.h>
+#include <ui/DisplayConfig.h>
 
-#include "GLHelper.h"
-
- namespace android {
+namespace android {
 
 GLHelper::GLHelper() :
     mDisplay(EGL_NO_DISPLAY),
@@ -228,15 +227,15 @@ bool GLHelper::computeWindowScale(uint32_t w, uint32_t h, float* scale) {
         return false;
     }
 
-    DisplayInfo info;
-    status_t err = mSurfaceComposerClient->getDisplayInfo(dpy, &info);
+    DisplayConfig config;
+    status_t err = mSurfaceComposerClient->getActiveDisplayConfig(dpy, &config);
     if (err != NO_ERROR) {
-        fprintf(stderr, "SurfaceComposer::getDisplayInfo failed: %#x\n", err);
+        fprintf(stderr, "SurfaceComposer::getActiveDisplayConfig failed: %#x\n", err);
         return false;
     }
 
-    float scaleX = float(info.w) / float(w);
-    float scaleY = float(info.h) / float(h);
+    float scaleX = static_cast<float>(config.resolution.getWidth()) / w;
+    float scaleY = static_cast<float>(config.resolution.getHeight()) / h;
     *scale = scaleX < scaleY ? scaleX : scaleY;
 
     return true;