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Merge "Add support to use preferred graphics backend" am: afab2aeb76 am: e53506a56f

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Original change: https://android-review.googlesource.com/c/platform/bootable/recovery/+/1835073

Change-Id: Ica27c6fa6ccc10398bd6a9a1c329ca298b9ddb4d
This commit is contained in:
Treehugger Robot 2021-09-23 21:03:30 +00:00 committed by Automerger Merge Worker
commit 760d9f0fa9
2 changed files with 40 additions and 10 deletions
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35
minui/graphics.cpp
View file

@ -42,6 +42,9 @@ static constexpr uint32_t alpha_mask = 0xff000000;
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 @@ void gr_flip() {
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 @@ int gr_init() {
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;

15
minui/include/minui/minui.h
View file

@ -104,10 +104,19 @@ enum class PixelFormat : int {
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.