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Ports: Support "restarts" in SDL2

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SDL2 applications are prone to reinitializing the SDL components when,
for example, changing the display resolution. This would lead to
crashes since we were doing things in the wrong order.

* We now decouple `GLContext` from `SDL_Window` a bit more, allowing
  the window to be destroyed before the GLContext.
* Do not quit the `GUI::Application`, let our event loop handle exiting

These changes allow changing the display resolution in the Quake3 port.
This commit is contained in:
Jelle Raaijmakers 2022-08-31 12:21:08 +02:00 committed by Linus Groh
parent 7d544344ca
commit 14ece2ac90
Notes: sideshowbarker 2024-07-17 07:36:40 +09:00 
Author: https://github.com/gmta
Commit: https://github.com/SerenityOS/serenity/commit/14ece2ac90
Pull-request: https://github.com/SerenityOS/serenity/pull/15085
1 changed files with 53 additions and 53 deletions
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106
Ports/SDL2/patches/0001-Add-SerenityOS-platform-support.patch
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@ -34,8 +34,8 @@ Co-Authored-By: circl <circl.lastname@gmail.com>
src/video/serenity/SDL_serenitymessagebox.h | 38 ++
src/video/serenity/SDL_serenitymouse.cpp | 142 +++++
src/video/serenity/SDL_serenitymouse.h | 39 ++
src/video/serenity/SDL_serenityvideo.cpp | 600 ++++++++++++++++++
src/video/serenity/SDL_serenityvideo.h | 98 +++
src/video/serenity/SDL_serenityvideo.cpp | 597 ++++++++++++++++++
src/video/serenity/SDL_serenityvideo.h | 101 +++
20 files changed, 1292 insertions(+), 25 deletions(-)
create mode 100644 src/audio/serenity/SDL_serenityaudio.cpp
create mode 100644 src/audio/serenity/SDL_serenityaudio.h
@ -862,10 +862,10 @@ index 0000000..039f036
+/* vi: set ts=4 sw=4 expandtab: */
diff --git a/src/video/serenity/SDL_serenityvideo.cpp b/src/video/serenity/SDL_serenityvideo.cpp
new file mode 100644
index 0000000..85e69ef
index 0000000..e222405
--- /dev/null
+++ b/src/video/serenity/SDL_serenityvideo.cpp
@@ -0,0 +1,600 @@
@@ -0,0 +1,597 @@
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
@ -904,14 +904,14 @@ index 0000000..85e69ef
+# include "SDL_serenitymouse.h"
+# include "SDL_serenityvideo.h"
+
+# include <dlfcn.h>
+# include <LibCore/EventLoop.h>
+# include <LibGfx/Bitmap.h>
+# include <LibGUI/Application.h>
+# include <LibGUI/Desktop.h>
+# include <LibGUI/Painter.h>
+# include <LibGUI/Widget.h>
+# include <LibGUI/Window.h>
+# include <LibGfx/Bitmap.h>
+# include <dlfcn.h>
+
+static SDL_Scancode scancode_map[] = {
+ SDL_SCANCODE_UNKNOWN,
@ -1112,11 +1112,12 @@ index 0000000..85e69ef
+
+int SERENITY_VideoInit(_THIS)
+{
+ VERIFY(!g_app);
+ g_app = GUI::Application::construct(0, nullptr);
+ g_app->set_quit_when_last_window_deleted(false);
+ dbgln("{}: Initialising SDL application", __FUNCTION__);
+
+ dbgln("SDL2: Initialising SDL application");
+ if (!g_app) {
+ g_app = GUI::Application::construct(0, nullptr);
+ g_app->set_quit_when_last_window_deleted(false);
+ }
+
+ SERENITY_InitMouse(_this);
+
@ -1131,9 +1132,8 @@ index 0000000..85e69ef
+ mode.refresh_rate = 60;
+ mode.driverdata = nullptr;
+
+ if (SDL_AddBasicVideoDisplay(&mode) < 0) {
+ if (SDL_AddBasicVideoDisplay(&mode) < 0)
+ return -1;
+ }
+
+ SDL_AddDisplayMode(&_this->displays[0], &mode);
+
@ -1152,13 +1152,11 @@ index 0000000..85e69ef
+{
+ dbgln("SERENITY_VideoQuit");
+ SERENITY_QuitMouse(_this);
+ g_app->quit();
+}
+
+SerenitySDLWidget::SerenitySDLWidget(SDL_Window* window)
+ : m_sdl_window(window)
+SerenitySDLWidget::SerenitySDLWidget(SDL_Window* sdl_window)
+ : m_sdl_window(sdl_window)
+{
+ update();
+}
+
+void SerenitySDLWidget::paint_event(GUI::PaintEvent& event)
@ -1248,7 +1246,8 @@ index 0000000..85e69ef
+
+int Serenity_CreateWindow(_THIS, SDL_Window* window)
+{
+ dbgln("SDL2: Creating new window of size {}x{}", window->w, window->h);
+ dbgln("{}: Creating new window of size {}x{}", __FUNCTION__, window->w, window->h);
+
+ auto w = new SerenityPlatformWindow(window);
+ window->driverdata = w;
+ w->window()->set_double_buffering_enabled(false);
@ -1357,7 +1356,7 @@ index 0000000..85e69ef
+int Serenity_CreateWindowFramebuffer(_THIS, SDL_Window* window, Uint32* format,
+ void** pixels, int* pitch)
+{
+ dbgln("SDL2: Creating a new framebuffer of size {}x{}", window->w, window->h);
+ dbgln("{}: Creating a new framebuffer of size {}x{}", __FUNCTION__, window->w, window->h);
+ auto win = SerenityPlatformWindow::from_sdl_window(window);
+ *format = SDL_PIXELFORMAT_RGB888;
+ auto bitmap_or_error = Gfx::Bitmap::try_create(Gfx::BitmapFormat::BGRx8888, {window->w, window->h});
@ -1366,7 +1365,6 @@ index 0000000..85e69ef
+ win->widget()->m_buffer = bitmap_or_error.release_value();
+ *pitch = win->widget()->m_buffer->pitch();
+ *pixels = win->widget()->m_buffer->scanline(0);
+ dbgln("Created framebuffer {}x{}", win->widget()->width(), win->widget()->height());
+ return 0;
+}
+
@ -1385,32 +1383,29 @@ index 0000000..85e69ef
+void Serenity_DestroyWindowFramebuffer(_THIS, SDL_Window* window)
+{
+ auto widget = SerenityPlatformWindow::from_sdl_window(window)->widget();
+ dbgln("SDL2: Destroy framebuffer {}", widget->m_buffer->size());
+ dbgln("{}: Destroy framebuffer {}", __FUNCTION__, widget->m_buffer->size());
+ widget->m_buffer = nullptr;
+}
+
+SDL_GLContext Serenity_GL_CreateContext(_THIS, SDL_Window* window)
+{
+ auto win = SerenityPlatformWindow::from_sdl_window(window);
+ auto platform_window = SerenityPlatformWindow::from_sdl_window(window);
+
+ Uint32 format;
+ void* pixels;
+ int pitch;
+ Serenity_CreateWindowFramebuffer(_this, window, &format, &pixels, &pitch);
+
+ win->widget()->m_gl_context = GL::create_context(*win->widget()->m_buffer);
+ GL::make_context_current(win->widget()->m_gl_context);
+
+ return new SerenityGLContext(*window);
+ auto gl_context = GL::create_context(*platform_window->widget()->m_buffer);
+ auto serenity_gl_context = new SerenityGLContext(move(gl_context));
+ platform_window->set_serenity_gl_context(serenity_gl_context);
+ GL::make_context_current(&serenity_gl_context->gl_context());
+ return serenity_gl_context;
+}
+
+void Serenity_GL_DeleteContext(_THIS, SDL_GLContext context)
+{
+ auto platform_context = static_cast<SerenityGLContext*>(context);
+ auto sdl_window = platform_context->sdl_window();
+ auto platform_window = SerenityPlatformWindow::from_sdl_window(&sdl_window);
+
+ platform_window->widget()->m_gl_context = nullptr;
+ delete platform_context;
+}
+
@ -1449,17 +1444,19 @@ index 0000000..85e69ef
+ return 0;
+
+ auto platform_window = SerenityPlatformWindow::from_sdl_window(window);
+ GL::make_context_current(platform_window->widget()->m_gl_context);
+ auto serenity_gl_context = static_cast<SerenityGLContext*>(context);
+ platform_window->set_serenity_gl_context(serenity_gl_context);
+ GL::make_context_current(&serenity_gl_context->gl_context());
+ return 0;
+}
+
+int Serenity_GL_SwapWindow(_THIS, SDL_Window* window)
+{
+ auto win = SerenityPlatformWindow::from_sdl_window(window);
+ if (win->widget()->m_gl_context)
+ GL::present_context(win->widget()->m_gl_context);
+ auto platform_window = SerenityPlatformWindow::from_sdl_window(window);
+ if (platform_window->serenity_gl_context())
+ GL::present_context(&platform_window->serenity_gl_context()->gl_context());
+
+ win->widget()->repaint();
+ platform_window->widget()->repaint();
+ return 0;
+}
+
@ -1468,10 +1465,10 @@ index 0000000..85e69ef
+/* vi: set ts=4 sw=4 expandtab: */
diff --git a/src/video/serenity/SDL_serenityvideo.h b/src/video/serenity/SDL_serenityvideo.h
new file mode 100644
index 0000000..b5c6759
index 0000000..f74e1bd
--- /dev/null
+++ b/src/video/serenity/SDL_serenityvideo.h
@@ -0,0 +1,98 @@
@@ -0,0 +1,101 @@
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
@ -1508,7 +1505,6 @@ index 0000000..b5c6759
+public:
+ explicit SerenitySDLWidget(SDL_Window*);
+ RefPtr<Gfx::Bitmap> m_buffer;
+ OwnPtr<GL::GLContext> m_gl_context;
+
+protected:
+ void paint_event(GUI::PaintEvent&) override;
@ -1531,11 +1527,24 @@ index 0000000..b5c6759
+ SDL_Window* m_sdl_window = nullptr;
+};
+
+class SerenityGLContext final {
+public:
+ explicit SerenityGLContext(NonnullOwnPtr<GL::GLContext> gl_context)
+ : m_gl_context(move(gl_context))
+ {
+ }
+
+ GL::GLContext& gl_context() { return *m_gl_context; }
+
+private:
+ NonnullOwnPtr<GL::GLContext> m_gl_context;
+};
+
+class SerenityPlatformWindow final {
+public:
+ SerenityPlatformWindow(SDL_Window* sdl_window)
+ : m_window(GUI::Window::construct())
+ , m_widget(SerenitySDLWidget::construct(sdl_window))
+ explicit SerenityPlatformWindow(SDL_Window* sdl_window)
+ : m_window(MUST(GUI::Window::try_create()))
+ , m_widget(MUST(SerenitySDLWidget::try_create(sdl_window)))
+ {
+ m_window->resize(sdl_window->w, sdl_window->h);
+ m_window->set_resizable(false);
@ -1546,27 +1555,18 @@ index 0000000..b5c6759
+ return static_cast<SerenityPlatformWindow*>(window->driverdata);
+ }
+
+ SerenityGLContext* serenity_gl_context() { return m_serenity_gl_context; }
+ void set_serenity_gl_context(SerenityGLContext* serenity_gl_context) { m_serenity_gl_context = serenity_gl_context; }
+
+ NonnullRefPtr<GUI::Window> window() { return m_window; }
+ NonnullRefPtr<SerenitySDLWidget> widget() { return m_widget; }
+
+private:
+ SerenityGLContext* m_serenity_gl_context;
+ NonnullRefPtr<GUI::Window> m_window;
+ NonnullRefPtr<SerenitySDLWidget> m_widget;
+};
+
+class SerenityGLContext final {
+public:
+ explicit SerenityGLContext(SDL_Window& sdl_window)
+ : m_sdl_window(sdl_window)
+ {
+ }
+
+ SDL_Window& sdl_window() const { return m_sdl_window; }
+
+private:
+ SDL_Window& m_sdl_window;
+};
+
+#endif /* SDL_serenityvideo_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */