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Defer rendering to idle time

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SDL_RenderCopy / SDL_RenderPresent was called too often, which sometimes
caused screen update to fail on Mac.
This commit is contained in:
kichikuou
2020-11-29 12:06:08 +09:00
parent 89d5fdcbc6
commit f2139440b6
7 changed files with 75 additions and 60 deletions
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src/sys/ags.cpp
+8 -3
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@@ -33,7 +33,7 @@ static SDL_Surface* display_surface;
box[n].ey = y2; \
}
AGS::AGS(NACT* parent, const char* fontfile) : nact(parent)
AGS::AGS(NACT* parent, const char* fontfile) : nact(parent), dirty(false)
{
sdlRenderer = SDL_CreateRenderer(g_window, -1, 0);
SDL_RenderSetLogicalSize(sdlRenderer, 640, 400);
@@ -502,7 +502,6 @@ void AGS::draw_screen(int sx, int sy, int width, int height)
void AGS::invalidate_screen(int sx, int sy, int width, int height)
{
SDL_UnlockSurface(hBmpDest);
int top = screen_height == 400 ? sy + (scroll - 400) : sy;
if (top < 0) {
height += top;
@@ -515,10 +514,16 @@ void AGS::invalidate_screen(int sx, int sy, int width, int height)
width = hBmpDest->w - sx;
SDL_Rect rect = {sx, sy, width, height};
SDL_UpdateTexture(sdlTexture, &rect, pixels, hBmpDest->pitch);
dirty = true;
}
void AGS::update_screen() {
if (!dirty)
return;
SDL_RenderClear(sdlRenderer);
SDL_RenderCopy(sdlRenderer, sdlTexture, NULL, NULL);
SDL_RenderPresent(sdlRenderer);
SDL_LockSurface(hBmpDest);
dirty = false;
}
#ifdef __EMSCRIPTEN__