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[client] egl: use eglSwapBuffersWithDamageKHR for cursor-only updates

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Instead of damaging the entire surface when rendering a cursor move,
we can use the EGL_KHR_swap_buffers_with_damage extension to only
damage the part of the window covered by the cursor. This should
reduce the cursor movement latency on Wayland.
This commit is contained in:
Quantum
2021-05-11 16:49:39 -04:00
committed by Geoffrey McRae
parent f9a9953071
commit e70cfd84fb
14 changed files with 140 additions and 15 deletions
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16
client/displayservers/Wayland/wayland.h
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@@ -29,6 +29,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
# include <EGL/eglext.h>
#endif
#include "egl_dynprocs.h"
#include "common/locking.h"
#include "common/countedbuffer.h"
#include "interface/displayserver.h"
@@ -66,6 +67,13 @@ struct SurfaceOutput
struct wl_list link;
};
enum EGLSwapWithDamageState {
SWAP_WITH_DAMAGE_UNKNOWN,
SWAP_WITH_DAMAGE_UNSUPPORTED,
SWAP_WITH_DAMAGE_KHR,
SWAP_WITH_DAMAGE_EXT,
};
struct WaylandDSState
{
bool pointerGrabbed;
@@ -88,8 +96,12 @@ struct WaylandDSState
bool warpSupport;
double cursorX, cursorY;
#ifdef ENABLE_EGL
#if defined(ENABLE_EGL) || defined(ENABLE_OPENGL)
struct wl_egl_window * eglWindow;
bool eglSwapWithDamageInit;
eglSwapBuffersWithDamageKHR_t eglSwapWithDamage;
EGLint * eglDamageRects;
int eglDamageRectCount;
#endif
#ifdef ENABLE_OPENGL
@@ -197,7 +209,7 @@ void waylandShowPointer(bool show);
#if defined(ENABLE_EGL) || defined(ENABLE_OPENGL)
bool waylandEGLInit(int w, int h);
EGLDisplay waylandGetEGLDisplay(void);
void waylandEGLSwapBuffers(EGLDisplay display, EGLSurface surface);
void waylandEGLSwapBuffers(EGLDisplay display, EGLSurface surface, const struct Rect * damage, int count);
#endif
#ifdef ENABLE_EGL