Support Windows XP (Old FFmpeg and build fixes)

Signed-off-by: Andrew Opalach <andrew@akon.city>

2 files changed, 25 insertions, 9 deletions

diff --git a/src/screen/screen.c b/src/screen/screen.c
index 23afa7e..0ff5eec 100644
--- a/src/screen/screen.c
+++ b/src/screen/screen.c
@@ -51,7 +51,7 @@ static void do_resize(struct camu_screen *scr, u32 width, u32 height)
         camu_view_calculate(&video->view, scr->width, scr->height);
     }
     // No buffers resize.
-    al_atomic_store(u32)(&scr->force_refresh, 1, AL_ATOMIC_RELAXED);
+    al_atomic_add(u32)(&scr->force_refresh, 1, AL_ATOMIC_RELAXED);
 }
 
 static void resize_callback(void *userdata, u32 width, u32 height)
@@ -309,6 +309,18 @@ static bool key_callback(void *userdata, u8 state, u16 button)
                 log_info("Scaling filters enabled.");
             }
             return true;
+        case STELA_KEY_C:
+            scr->transparent_background = !scr->transparent_background;
+            if (scr->transparent_background) {
+                scr->renderer->set_background(scr->renderer, CAMU_BACKGROUND_TRANSPARENT);
+                log_info("Background transparent.");
+            } else {
+                scr->renderer->set_background(scr->renderer, CAMU_BACKGROUND_DEFAULT);
+                log_info("Background solid.");
+            }
+            // Force refresh for if there's no video buffer.
+            al_atomic_add(u32)(&scr->force_refresh, 1, AL_ATOMIC_RELAXED);
+            return true;
         default:
             break;
         }
@@ -402,6 +414,7 @@ bool camu_screen_create_window(struct camu_screen *scr, const char *name)
     scr->height = scr->window->height;
     scr->fullscreen = false;
     scr->scaling_disabled = false;
+    scr->transparent_background = false;
 #ifdef STELA_EVENT_BUFFER
     nn_thread_create(&scr->thread, event_thread, scr);
 #endif
@@ -412,13 +425,13 @@ bool camu_screen_create_renderer(struct camu_screen *scr, struct camu_renderer *
 {
     scr->renderer = renderer;
     return renderer->create_renderer(renderer, &scr->width, &scr->height,
-#if defined CAMU_RENDERER_VULKAN
+#if defined STELA_API_VULKAN
         scr->window->get_vk_proc_address,
         scr->window->vk_create_surface,
         scr->window->vk_get_extensions,
-#elif defined CAMU_RENDERER_DX11
+#elif defined STELA_API_DX11
         scr->window->win32_window,
-#elif defined CAMU_RENDERER_OPENGL
+#elif defined STELA_API_OPENGL
 #ifdef STELA_USE_EGL
         scr->window->egl_display,
         scr->window->egl_context,
@@ -587,14 +600,14 @@ void camu_screen_set_state(struct camu_screen *scr, s32 state)
     if (al_atomic_load(s32)(&scr->state, AL_ATOMIC_ACQUIRE) != CAMU_SCREEN_STOPPED) {
         al_atomic_store(s32)(&scr->state, state, AL_ATOMIC_RELEASE);
         if (state == CAMU_SCREEN_PAUSED) {
-            al_atomic_store(u32)(&scr->force_refresh, 1, AL_ATOMIC_RELAXED);
+            al_atomic_add(u32)(&scr->force_refresh, 1, AL_ATOMIC_RELAXED);
         }
     }
 }
 
 void camu_screen_force_refresh(struct camu_screen *scr)
 {
-    al_atomic_store(u32)(&scr->force_refresh, 1, AL_ATOMIC_RELAXED);
+    al_atomic_add(u32)(&scr->force_refresh, 1, AL_ATOMIC_RELAXED);
     camu_screen_wake(scr);
 }
 
@@ -622,13 +635,15 @@ bool camu_screen_tick(struct camu_screen *scr, bool *force)
 {
     s32 state = al_atomic_load(s32)(&scr->state, AL_ATOMIC_RELAXED);
     al_assert(state != CAMU_SCREEN_STOPPED);
-    bool paused = state == CAMU_SCREEN_PAUSED;
-    bool do_render = camu_screen_poll(scr, paused) || !paused;
     u32 force_refresh = al_atomic_load(u32)(&scr->force_refresh, AL_ATOMIC_ACQUIRE);
+    bool paused = state == CAMU_SCREEN_PAUSED && force_refresh == 0;
+    bool do_render = camu_screen_poll(scr, paused) || !paused;
+    // Should be AL_ATOMIC_ACQ_REL.
+    force_refresh = al_atomic_load(u32)(&scr->force_refresh, AL_ATOMIC_ACQUIRE);
     do_render |= force_refresh > 0;
     *force = force_refresh > 0;
     if (force_refresh > 0) {
-        al_atomic_store(u32)(&scr->force_refresh, 0, AL_ATOMIC_RELEASE);
+        al_atomic_sub(u32)(&scr->force_refresh, 1, AL_ATOMIC_RELEASE);
     }
     return do_render;
 }
diff --git a/src/screen/screen.h b/src/screen/screen.h
index 4ba07c2..afd2dee 100644
--- a/src/screen/screen.h
+++ b/src/screen/screen.h
@@ -64,6 +64,7 @@ struct camu_screen {
     u32 height;
     bool fullscreen;
     bool scaling_disabled;
+    bool transparent_background;
     u64 last_click_ts;
     f64 last_mouse_y;
     f64 last_mouse_x;