Merge "Add support to use preferred graphics backend" am: afab2aeb76 am: e53506a56f am: 760d9f0fa9
Original change: https://android-review.googlesource.com/c/platform/bootable/recovery/+/1835073
Change-Id: I97040ad5f619633453d367a54e33e2aab154485a
diff --git a/minui/graphics.cpp b/minui/graphics.cpp
index dce1e61..f25694a 100644
--- a/minui/graphics.cpp
+++ b/minui/graphics.cpp
@@ -42,6 +42,9 @@
static GRSurface* gr_draw = nullptr;
static GRRotation rotation = GRRotation::NONE;
static PixelFormat pixel_format = PixelFormat::UNKNOWN;
+// The graphics backend list that provides fallback options for the default backend selection.
+// For example, it will fist try DRM, then try FBDEV if DRM is unavailable.
+constexpr auto default_backends = { GraphicsBackend::DRM, GraphicsBackend::FBDEV };
static bool outside(int x, int y) {
auto swapped = (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT);
@@ -340,7 +343,22 @@
gr_draw = gr_backend->Flip();
}
+std::unique_ptr<MinuiBackend> create_backend(GraphicsBackend backend) {
+ switch (backend) {
+ case GraphicsBackend::DRM:
+ return std::make_unique<MinuiBackendDrm>();
+ case GraphicsBackend::FBDEV:
+ return std::make_unique<MinuiBackendFbdev>();
+ default:
+ return nullptr;
+ }
+}
+
int gr_init() {
+ return gr_init(default_backends);
+}
+
+int gr_init(std::initializer_list<GraphicsBackend> backends) {
// pixel_format needs to be set before loading any resources or initializing backends.
std::string format = android::base::GetProperty("ro.minui.pixel_format", "");
if (format == "ABGR_8888") {
@@ -361,19 +379,22 @@
ret);
}
- auto backend = std::unique_ptr<MinuiBackend>{ std::make_unique<MinuiBackendDrm>() };
- gr_draw = backend->Init();
-
- if (!gr_draw) {
- backend = std::make_unique<MinuiBackendFbdev>();
- gr_draw = backend->Init();
+ std::unique_ptr<MinuiBackend> minui_backend;
+ for (GraphicsBackend backend : backends) {
+ minui_backend = create_backend(backend);
+ if (!minui_backend) {
+ printf("gr_init: minui_backend %d is a nullptr\n", backend);
+ continue;
+ }
+ gr_draw = minui_backend->Init();
+ if (gr_draw) break;
}
if (!gr_draw) {
return -1;
}
- gr_backend = backend.release();
+ gr_backend = minui_backend.release();
int overscan_percent = android::base::GetIntProperty("ro.minui.overscan_percent", 0);
overscan_offset_x = gr_draw->width * overscan_percent / 100;
diff --git a/minui/include/minui/minui.h b/minui/include/minui/minui.h
index 163e41d..5470457 100644
--- a/minui/include/minui/minui.h
+++ b/minui/include/minui/minui.h
@@ -104,10 +104,19 @@
ARGB = 4,
};
-// Initializes the graphics backend and loads font file. Returns 0 on success, or -1 on error. Note
-// that the font initialization failure would be non-fatal, as caller may not need to draw any text
-// at all. Caller can check the font initialization result via gr_sys_font() as needed.
+enum class GraphicsBackend : int {
+ UNKNOWN = 0,
+ DRM = 1,
+ FBDEV = 2,
+};
+
+// Initializes the default graphics backend and loads font file. Returns 0 on success, or -1 on
+// error. Note that the font initialization failure would be non-fatal, as caller may not need to
+// draw any text at all. Caller can check the font initialization result via gr_sys_font() as
+// needed.
int gr_init();
+// Supports backend selection for minui client.
+int gr_init(std::initializer_list<GraphicsBackend> backends);
// Frees the allocated resources. The function is idempotent, and safe to be called if gr_init()
// didn't finish successfully.