[emscripten] Fix MEMORY64 mode (#3437)

fran6co · web-flow · commit 14e0aa5aff65 · 2025-06-28T21:31:59.000+02:00
EMSCRIPTEN_WEBGL_CONTEXT_HANDLE is 64bit when using MEMORY64 but it's stored as an int 32 bit causing overflow
diff --git a/src/glcontext_html5.cpp b/src/glcontext_html5.cpp
@@ -28,7 +28,7 @@ namespace bgfx { namespace gl
 
 	struct SwapChainGL
 	{
-		SwapChainGL(int _context, const char* _canvas)
+		SwapChainGL(EMSCRIPTEN_WEBGL_CONTEXT_HANDLE _context, const char* _canvas)
 			: m_context(_context)
 		{
 			size_t length = bx::strLen(_canvas) + 1;
@@ -60,7 +60,7 @@ namespace bgfx { namespace gl
 			// to the browser.
 		}
 
-		int m_context;
+		EMSCRIPTEN_WEBGL_CONTEXT_HANDLE m_context;
 		char* m_canvas;
 	};
 

Original file line number	Diff line number	Diff line change
`@@ -28,7 +28,7 @@ namespace bgfx { namespace gl`
`28`	`28`
`29`	`29`	`struct SwapChainGL`
`30`	`30`	`{`
`31`		`- SwapChainGL(int _context, const char* _canvas)`
	`31`	`+ SwapChainGL(EMSCRIPTEN_WEBGL_CONTEXT_HANDLE _context, const char* _canvas)`
`32`	`32`	`: m_context(_context)`
`33`	`33`	`{`
`34`	`34`	`size_t length = bx::strLen(_canvas) + 1;`
`@@ -60,7 +60,7 @@ namespace bgfx { namespace gl`
`60`	`60`	`// to the browser.`
`61`	`61`	`}`
`62`	`62`
`63`		`- int m_context;`
	`63`	`+ EMSCRIPTEN_WEBGL_CONTEXT_HANDLE m_context;`
`64`	`64`	`char* m_canvas;`
`65`	`65`	`};`
`66`	`66`