commit 6715912ca359cc664773fed547796da381623210
author Charlie Birks <charlie@daftgames.net> Thu May 09 12:09:40 2019 +0100
committer Charlie Birks <charlie@daftgames.net> Thu May 09 12:09:40 2019 +0100
tree d5009d58350dd4f16f76269c27fa6d478f04587a
parent e7bc640ec4f6056957bbeedd09ec3697613d9f5f

Emscripten: Switch from canvas[XY] to target[XY]
Allows mouse/touch events to work on non-default canvases

src/video/emscripten/SDL_emscriptenevents.c

diff --git a/src/video/emscripten/SDL_emscriptenevents.c b/src/video/emscripten/SDL_emscriptenevents.c
index 5d5f88f..09003af 100644
--- a/src/video/emscripten/SDL_emscriptenevents.c
+++ b/src/video/emscripten/SDL_emscriptenevents.c
@@ -330,8 +330,8 @@
         my = residualy;
         residualy -= my;
     } else {
-        mx = mouseEvent->canvasX * xscale;
-        my = mouseEvent->canvasY * yscale;
+        mx = mouseEvent->targetX * xscale;
+        my = mouseEvent->targetY * yscale;
     }
 
     SDL_SendMouseMotion(window_data->window, 0, isPointerLocked, mx, my);
@@ -375,8 +375,8 @@
 
     /* Do not consume the event if the mouse is outside of the canvas. */
     emscripten_get_element_css_size(window_data->canvas_id, &css_w, &css_h);
-    if (mouseEvent->canvasX < 0 || mouseEvent->canvasX >= css_w ||
-        mouseEvent->canvasY < 0 || mouseEvent->canvasY >= css_h) {
+    if (mouseEvent->targetX < 0 || mouseEvent->targetX >= css_w ||
+        mouseEvent->targetY < 0 || mouseEvent->targetY >= css_h) {
         return 0;
     }
 
@@ -388,7 +388,7 @@
 {
     SDL_WindowData *window_data = userData;
 
-    int mx = mouseEvent->canvasX, my = mouseEvent->canvasY;
+    int mx = mouseEvent->targetX, my = mouseEvent->targetY;
     const int isPointerLocked = window_data->has_pointer_lock;
 
     if (!isPointerLocked) {
@@ -450,8 +450,8 @@
             continue;
 
         id = touchEvent->touches[i].identifier;
-        x = touchEvent->touches[i].canvasX / client_w;
-        y = touchEvent->touches[i].canvasY / client_h;
+        x = touchEvent->touches[i].targetX / client_w;
+        y = touchEvent->touches[i].targetY / client_h;
 
         if (eventType == EMSCRIPTEN_EVENT_TOUCHSTART) {
             SDL_SendTouch(deviceId, id, SDL_TRUE, x, y, 1.0f);