diff options
| -rw-r--r-- | src/gallium/state_trackers/wgl/stw_framebuffer.c | 36 |
1 files changed, 30 insertions, 6 deletions
diff --git a/src/gallium/state_trackers/wgl/stw_framebuffer.c b/src/gallium/state_trackers/wgl/stw_framebuffer.c index f7cfab5d5e1..95d892add34 100644 --- a/src/gallium/state_trackers/wgl/stw_framebuffer.c +++ b/src/gallium/state_trackers/wgl/stw_framebuffer.c @@ -44,6 +44,8 @@ /** * Search the framebuffer with the matching HWND while holding the * stw_dev::fb_mutex global lock. + * If a stw_framebuffer is found, lock it and return the pointer. + * Else, return NULL. */ static inline struct stw_framebuffer * stw_framebuffer_from_hwnd_locked(HWND hwnd) @@ -61,9 +63,11 @@ stw_framebuffer_from_hwnd_locked(HWND hwnd) /** - * Destroy this framebuffer. Both stw_dev::fb_mutex and stw_framebuffer::mutex - * must be held, by this order. If there are still references to the - * framebuffer, nothing will happen. + * Decrement the reference count on the given stw_framebuffer object. + * If the reference count hits zero, destroy the object. + * + * Note: Both stw_dev::fb_mutex and stw_framebuffer::mutex must already + * be locked. */ static void stw_framebuffer_destroy_locked(struct stw_framebuffer *fb) @@ -77,6 +81,7 @@ stw_framebuffer_destroy_locked(struct stw_framebuffer *fb) return; } + /* remove this stw_framebuffer from the device's linked list */ link = &stw_dev->fb_head; while (*link != fb) link = &(*link)->next; @@ -98,6 +103,9 @@ stw_framebuffer_destroy_locked(struct stw_framebuffer *fb) } +/** + * Unlock the given stw_framebuffer object. + */ void stw_framebuffer_release(struct stw_framebuffer *fb) { @@ -106,6 +114,10 @@ stw_framebuffer_release(struct stw_framebuffer *fb) } +/** + * Query the size of the given framebuffer's on-screen window and update + * the stw_framebuffer's width/height. + */ static void stw_framebuffer_get_size(struct stw_framebuffer *fb) { @@ -229,6 +241,11 @@ stw_call_window_proc(int nCode, WPARAM wParam, LPARAM lParam) } +/** + * Create a new stw_framebuffer object which corresponds to the given + * HDC/window. If successful, we return the new stw_framebuffer object + * with its mutex locked. + */ struct stw_framebuffer * stw_framebuffer_create(HDC hdc, int iPixelFormat) { @@ -343,6 +360,9 @@ stw_framebuffer_update(struct stw_framebuffer *fb) } +/** + * Try to free all stw_framebuffer objects associated with the device. + */ void stw_framebuffer_cleanup(void) { @@ -371,6 +391,7 @@ stw_framebuffer_cleanup(void) /** * Given an hdc, return the corresponding stw_framebuffer. + * The returned stw_framebuffer will have its mutex locked. */ static inline struct stw_framebuffer * stw_framebuffer_from_hdc_locked(HDC hdc) @@ -387,7 +408,8 @@ stw_framebuffer_from_hdc_locked(HDC hdc) /** - * Given an hdc, return the corresponding stw_framebuffer. + * Given an HDC, return the corresponding stw_framebuffer. + * The returned stw_framebuffer will have its mutex locked. */ struct stw_framebuffer * stw_framebuffer_from_hdc(HDC hdc) @@ -406,7 +428,8 @@ stw_framebuffer_from_hdc(HDC hdc) /** - * Given an hdc, return the corresponding stw_framebuffer. + * Given an HWND, return the corresponding stw_framebuffer. + * The returned stw_framebuffer will have its mutex locked. */ struct stw_framebuffer * stw_framebuffer_from_hwnd(HWND hwnd) @@ -545,7 +568,8 @@ DrvPresentBuffers(HDC hdc, PGLPRESENTBUFFERSDATA data) /** * Queue a composition. * - * It will drop the lock on success. + * The stw_framebuffer object must have its mutex locked. The mutex will + * be unlocked here before returning. */ BOOL stw_framebuffer_present_locked(HDC hdc, |