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Update emscripten mouse handling

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This commit is contained in:
andzdroid 2026-08-17 23:19:22 +01:00
commit 3a25602074
1 changed files with 6 additions and 20 deletions
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26
src/platforms/rcore_web_emscripten.c
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@ -1723,32 +1723,18 @@ static EM_BOOL EmscriptenMouseMoveCallback(int eventType, const EmscriptenMouseE
else else
{ {
// Get mouse position in canvas CSS pixels // Get mouse position in canvas CSS pixels
float mouseCssX = (float)mouseEvent->canvasX; float mouseCssX = (float)mouseEvent->targetX;
float mouseCssY = (float)mouseEvent->canvasY; float mouseCssY = (float)mouseEvent->targetY;
// Get canvas sizes // Get canvas sizes
double cssWidth = 0.0; double cssWidth = 0.0;
double cssHeight = 0.0; double cssHeight = 0.0;
emscripten_get_element_css_size(platform.canvasId, &cssWidth, &cssHeight); emscripten_get_element_css_size(platform.canvasId, &cssWidth, &cssHeight);
int fbWidth = 0; float normalizedX = mouseCssX/(float)cssWidth;
int fbHeight = 0; float normalizedY = mouseCssY/(float)cssHeight;
emscripten_get_canvas_element_size(platform.canvasId, &fbWidth, &fbHeight); CORE.Input.Mouse.currentPosition.x = normalizedX*(float)CORE.Window.screen.width;
CORE.Input.Mouse.currentPosition.y = normalizedY*(float)CORE.Window.screen.height;
// Convert CSS to framebuffer coordinates
float scaleX = (float)fbWidth/(float)cssWidth;
float scaleY = (float)fbHeight/(float)cssHeight;
int mouseX = (int)(mouseCssX*scaleX);
int mouseY = (int)(mouseCssY*scaleY);
CORE.Input.Mouse.currentPosition.x = mouseX;//(float)mouseEvent->canvasX;
CORE.Input.Mouse.currentPosition.y = mouseY;//(float)mouseEvent->canvasY;
// Shorter alternative:
//double dpr = emscripten_get_device_pixel_ratio();
//int mouseX = (int)(e->canvasX*dpr);
//int mouseY = (int)(e->canvasY*dpr);
CORE.Input.Touch.position[0] = CORE.Input.Mouse.currentPosition; CORE.Input.Touch.position[0] = CORE.Input.Mouse.currentPosition;
} }