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[client] egl: use queue of damages

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This prevents damage from being overwritten when frames are received
faster than could be rendered.

This implementation cycles between two queues, removing all need for
memory allocation.
This commit is contained in:
Quantum 2021-07-31 20:37:23 -04:00 committed by Geoffrey McRae
parent 2e0f765190
commit b9a7ce17fe
1 changed files with 44 additions and 42 deletions
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56
client/renderers/EGL/egl.c
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@ -49,6 +49,7 @@
#include "splash.h"
#define SPLASH_FADE_TIME 1000000
#define DESKTOP_DAMAGE_COUNT 2
struct Options
{
@ -102,7 +103,8 @@ struct Inst
struct CursorState cursorLast;
bool hadOverlay;
_Atomic(struct DesktopDamage *) desktopDamage;
struct DesktopDamage desktopDamage[DESKTOP_DAMAGE_COUNT];
atomic_uint desktopDamageIdx;
RingBuffer importTimings;
GraphHandle importGraph;
@ -180,6 +182,16 @@ static void egl_setup(void)
option_register(egl_options);
}
inline static struct DesktopDamage * currentDesktopDamage(struct Inst * this)
{
return this->desktopDamage + atomic_load(&this->desktopDamageIdx) % DESKTOP_DAMAGE_COUNT;
}
inline static struct DesktopDamage * finishDesktopDamage(struct Inst * this)
{
return this->desktopDamage + atomic_fetch_add(&this->desktopDamageIdx, 1) % DESKTOP_DAMAGE_COUNT;
}
static bool egl_create(void ** opaque, const LG_RendererParams params, bool * needsOpenGL)
{
// check if EGL is even available
@ -209,7 +221,8 @@ static bool egl_create(void ** opaque, const LG_RendererParams params, bool * ne
this->screenScaleY = 1.0f;
this->uiScale = 1.0;
atomic_init(&this->desktopDamage, NULL);
atomic_init(&this->desktopDamageIdx, 0);
this->desktopDamage[0].count = -1;
this->importTimings = ringbuffer_new(256, sizeof(float));
this->importGraph = app_registerGraph("IMPORT", this->importTimings, 0.0f, 5.0f);
@ -419,14 +432,7 @@ static void egl_on_resize(void * opaque, const int width, const int height, cons
egl_calc_mouse_state(this);
struct DesktopDamage * damage = malloc(sizeof(struct DesktopDamage));
if (!damage)
{
DEBUG_FATAL("Out of memory");
abort();
}
damage->count = 0;
free(atomic_exchange(&this->desktopDamage, damage));
currentDesktopDamage(this)->count = -1;
// this is needed to refresh the font atlas texture
ImGui_ImplOpenGL3_Shutdown();
@ -512,15 +518,14 @@ static bool egl_on_frame(void * opaque, const FrameBuffer * frame, int dmaFd,
this->start = true;
struct DesktopDamage * damage = malloc(sizeof(struct DesktopDamage));
if (!damage)
struct DesktopDamage * damage = currentDesktopDamage(this);
if (damage->count == -1 || damage->count + damageRectsCount >= KVMFR_MAX_DAMAGE_RECTS)
damage->count = -1;
else
{
DEBUG_FATAL("Out of memory");
abort();
memcpy(damage->rects + damage->count, damageRects, damageRectsCount * sizeof(FrameDamageRect));
damage->count += damageRectsCount;
}
damage->count = damageRectsCount;
memcpy(damage->rects, damageRects, damageRectsCount * sizeof(FrameDamageRect));
free(atomic_exchange(&this->desktopDamage, damage));
return true;
}
@ -810,11 +815,10 @@ static bool egl_render(void * opaque, LG_RendererRotate rotate, const bool newFr
bool hasOverlay = false;
struct CursorState cursorState = { .visible = false };
struct DesktopDamage * desktopDamage = NULL;
struct DesktopDamage * desktopDamage = finishDesktopDamage(this);
if (this->start)
{
desktopDamage = atomic_exchange(&this->desktopDamage, NULL);
if (egl_desktop_render(this->desktop,
this->translateX, this->translateY,
this->scaleX , this->scaleY ,
@ -833,7 +837,7 @@ static bool egl_render(void * opaque, LG_RendererRotate rotate, const bool newFr
this->width, this->height);
}
else
desktopDamage->count = 0;
desktopDamage->count = -1;
}
if (!this->waitDone)
@ -865,7 +869,7 @@ static bool egl_render(void * opaque, LG_RendererRotate rotate, const bool newFr
hasOverlay = true;
}
if (desktopDamage && rotate != LG_ROTATE_0)
if (desktopDamage->count > 0 && rotate != LG_ROTATE_0)
{
for (int i = 0; i < desktopDamage->count; ++i)
{
@ -958,10 +962,8 @@ static bool egl_render(void * opaque, LG_RendererRotate rotate, const bool newFr
this->cursorLast = cursorState;
if (desktopDamage)
{
if (desktopDamage->count == 0)
// Zero damage count means invalidating entire window.
if (desktopDamage->count == -1)
// -1 damage count means invalidating entire window.
damageIdx = 0;
else
{
@ -981,11 +983,11 @@ static bool egl_render(void * opaque, LG_RendererRotate rotate, const bool newFr
}
}
}
}
else
damageIdx = 0;
this->hadOverlay = hasOverlay;
free(desktopDamage);
desktopDamage->count = 0;
app_eglSwapBuffers(this->display, this->surface, damage, damageIdx);
return true;