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emscripten: check if device pixel ratio has changed

This commit is contained in:
Csongor Szabo 2016-10-14 17:06:28 +01:00
parent bc93bdb921
commit 01f6273675
2 changed files with 7 additions and 1 deletions
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4
src/video/emscripten/SDL_emscriptenevents.c
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@ -545,6 +545,10 @@ EM_BOOL
Emscripten_HandleResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData) Emscripten_HandleResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData)
{ {
SDL_WindowData *window_data = userData; SDL_WindowData *window_data = userData;
/* update pixel ratio */
window_data->pixel_ratio = emscripten_get_device_pixel_ratio();
if(!(window_data->window->flags & FULLSCREEN_MASK)) if(!(window_data->window->flags & FULLSCREEN_MASK))
{ {
/* this will only work if the canvas size is set through css */ /* this will only work if the canvas size is set through css */

4
src/video/emscripten/SDL_emscriptenvideo.c
View File

@ -209,7 +209,7 @@ Emscripten_CreateWindow(_THIS, SDL_Window * window)
emscripten_get_element_css_size(NULL, &css_w, &css_h); emscripten_get_element_css_size(NULL, &css_w, &css_h);
wdata->external_size = css_w != scaled_w || css_h != scaled_h; wdata->external_size = SDL_floor(css_w) != scaled_w || SDL_floor(css_h) != scaled_h;
if ((window->flags & SDL_WINDOW_RESIZABLE) && wdata->external_size) { if ((window->flags & SDL_WINDOW_RESIZABLE) && wdata->external_size) {
/* external css has resized us */ /* external css has resized us */
@ -262,6 +262,8 @@ static void Emscripten_SetWindowSize(_THIS, SDL_Window * window)
if (window->driverdata) { if (window->driverdata) {
data = (SDL_WindowData *) window->driverdata; data = (SDL_WindowData *) window->driverdata;
/* update pixel ratio */
data->pixel_ratio = emscripten_get_device_pixel_ratio();
emscripten_set_canvas_size(window->w * data->pixel_ratio, window->h * data->pixel_ratio); emscripten_set_canvas_size(window->w * data->pixel_ratio, window->h * data->pixel_ratio);
/*scale canvas down*/ /*scale canvas down*/