[PATCH hwc v2 13/18] drm_hwcomposer: Pass buffer sizes to Prepareframebuffer

[Alexandru Gheorghe <alexandru-cosmin.gheorghe@xxxxxxx>]

Currently Prepareframebuffer uses the mode of the connected connector
to decide how big the buffer should be, however when using the
drmdisplaycompositor just for flattening, the mode had not been set
yet, so we need a way to pass the desired buffer sizes.

Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@xxxxxxx>
---
 drmdisplaycompositor.cpp | 7 ++++---
 drmdisplaycompositor.h   | 3 ++-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drmdisplaycompositor.cpp b/drmdisplaycompositor.cpp
index 6e5be24..afd3b05 100644
--- a/drmdisplaycompositor.cpp
+++ b/drmdisplaycompositor.cpp
@@ -268,14 +268,15 @@ DrmDisplayCompositor::GetActiveModeResolution() {
 }
 
 int DrmDisplayCompositor::PrepareFramebuffer(
-    DrmFramebuffer &fb, DrmDisplayComposition *display_comp) {
+    DrmFramebuffer &fb, DrmDisplayComposition *display_comp, uint32_t width,
+    uint32_t height) {
   int ret = fb.WaitReleased(-1);
   if (ret) {
     ALOGE("Failed to wait for framebuffer release %d", ret);
     return ret;
   }
-  uint32_t width, height;
-  std::tie(width, height, ret) = GetActiveModeResolution();
+  if (width == 0 || height == 0)
+    std::tie(width, height, ret) = GetActiveModeResolution();
   if (ret) {
     ALOGE(
         "Failed to allocate framebuffer because the display resolution could "
diff --git a/drmdisplaycompositor.h b/drmdisplaycompositor.h
index ccaffb4..0f8daad 100644
--- a/drmdisplaycompositor.h
+++ b/drmdisplaycompositor.h
@@ -115,7 +115,8 @@ class DrmDisplayCompositor {
   static const int kAcquireWaitTimeoutMs = 100;
 
   int PrepareFramebuffer(DrmFramebuffer &fb,
-                         DrmDisplayComposition *display_comp);
+                         DrmDisplayComposition *display_comp,
+                         uint32_t width = 0, uint32_t height = 0);
   int ApplySquash(DrmDisplayComposition *display_comp);
   int ApplyPreComposite(DrmDisplayComposition *display_comp);
   int PrepareFrame(DrmDisplayComposition *display_comp);
-- 
2.7.4

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