ensure canvas/viewport/scissor has integer dimensions

src/renderers/WebGLRenderer.js

@@ -278,8 +278,8 @@ function WebGLRenderer( parameters ) {
 		utils = new WebGLUtils( _gl, extensions, capabilities );
 
 		state = new WebGLState( _gl, extensions, utils, capabilities );
-		state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ) );
-		state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ) );
+		state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor() );
+		state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor() );
 
 		info = new WebGLInfo( _gl );
 		properties = new WebGLProperties();
@@ -393,8 +393,8 @@ function WebGLRenderer( parameters ) {
 		_width = width;
 		_height = height;
 
-		_canvas.width = width * _pixelRatio;
-		_canvas.height = height * _pixelRatio;
+		_canvas.width = Math.floor( width * _pixelRatio );
+		_canvas.height = Math.floor( height * _pixelRatio );
 
 		if ( updateStyle !== false ) {
 
@@ -417,7 +417,7 @@ function WebGLRenderer( parameters ) {
 
 		}
 
-		return target.set( _width * _pixelRatio, _height * _pixelRatio );
+		return target.set( _width * _pixelRatio, _height * _pixelRatio ).floor();
 
 	};
 
@@ -428,8 +428,8 @@ function WebGLRenderer( parameters ) {
 
 		_pixelRatio = pixelRatio;
 
-		_canvas.width = width * pixelRatio;
-		_canvas.height = height * pixelRatio;
+		_canvas.width = Math.floor( width * pixelRatio );
+		_canvas.height = Math.floor( height * pixelRatio );
 
 		this.setViewport( 0, 0, width, height );
 
@@ -467,7 +467,7 @@ function WebGLRenderer( parameters ) {
 
 		}
 
-		state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ) );
+		state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor() );
 
 	};
 
@@ -489,7 +489,7 @@ function WebGLRenderer( parameters ) {
 
 		}
 
-		state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ) );
+		state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor() );
 
 	};
 
@@ -2447,8 +2447,8 @@ function WebGLRenderer( parameters ) {
 
 		} else {
 
-			_currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio );
-			_currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio );
+			_currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor();
+			_currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor();
 			_currentScissorTest = _scissorTest;
 
 		}