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Extract out logical size update operation into screen.c

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This commit is contained in:
Shaoxing Wang 2018-09-05 22:56:33 +08:00
parent 48e10b9daa
commit 8313e60ee2
3 changed files with 23 additions and 11 deletions
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14
app/src/scrcpy.c
View file

@ -83,18 +83,10 @@ static SDL_bool event_loop(void) {
switch (event.window.event) {
case SDL_WINDOWEVENT_EXPOSED:
case SDL_WINDOWEVENT_SIZE_CHANGED:
screen_render(&screen);
int scale_x, scale_y;
get_window_scale(SDL_GetWindowFromID(event.button.windowID), &scale_x, &scale_y);
if (scale_x != screen.scale_x || scale_y != screen.scale_y) {
int logical_width, logical_height;
SDL_RenderGetLogicalSize(screen.renderer, &logical_width, &logical_height);
logical_width *= (float)scale_x / screen.scale_x;
logical_height *= (float)scale_y / screen.scale_y;
screen.scale_x = scale_x;
screen.scale_y = scale_y;
SDL_RenderSetLogicalSize(screen.renderer, logical_width, logical_height);
if (!screen_update_logical_size_if_needed(&screen)) {
return SDL_FALSE;
}
screen_render(&screen);
break;
}
break;

18
app/src/screen.c
View file

@ -74,6 +74,24 @@ void get_window_scale(SDL_Window *window, int *scale_x, int *scale_y) {
*scale_y = output_h / win_h;
}
SDL_bool screen_update_logical_size_if_needed(struct screen *screen) {
int scale_x, scale_y;
get_window_scale(screen->window, &scale_x, &scale_y);
if (scale_x != screen->scale_x || scale_y != screen->scale_y) {
int logical_width, logical_height;
SDL_RenderGetLogicalSize(screen->renderer, &logical_width, &logical_height);
logical_width *= (float)scale_x / screen->scale_x;
logical_height *= (float)scale_y / screen->scale_y;
screen->scale_x = scale_x;
screen->scale_y = scale_y;
if (SDL_RenderSetLogicalSize(screen->renderer, logical_width, logical_height)) {
LOGE("Could not set renderer logical size: %s", SDL_GetError());
return SDL_FALSE;
}
}
return SDL_TRUE;
}
// get the preferred display bounds (i.e. the screen bounds with some margins)
static SDL_bool get_preferred_display_bounds(struct size *bounds) {
SDL_Rect rect;

2
app/src/screen.h
View file

@ -70,4 +70,6 @@ void screen_resize_to_pixel_perfect(struct screen *screen);
void get_window_scale(SDL_Window *window, int *scale_x, int *scale_y);
SDL_bool screen_update_logical_size_if_needed(struct screen *screen);
#endif