issue #1515: [LINUX support] Adding a zoom function for debugging large resolution (e.g.new ipad) app on desktop.

cocos2dx/platform/linux/CCEGLView.cpp

@@ -77,6 +77,7 @@ NS_CC_BEGIN
 
 CCEGLView::CCEGLView()
 : bIsInit(false)
+, m_fFrameZoomFactor(1.0f)
 {
 }
 
@@ -109,6 +110,7 @@ void charEventHandle(int iCharID,int iCharState) {
 
 void mouseButtonEventHandle(int iMouseID,int iMouseState) {
 	if (iMouseID == GLFW_MOUSE_BUTTON_LEFT) {
+        CCEGLView* pEGLView = CCEGLView::sharedOpenGLView();
 		//get current mouse pos
 		int x,y;
 		glfwGetMousePos(&x, &y);
@@ -120,12 +122,14 @@ void mouseButtonEventHandle(int iMouseID,int iMouseState) {
 			return;
 		}
 		*/
+         oPoint.x /= pEGLView->m_fFrameZoomFactor;
+         oPoint.y /= pEGLView->m_fFrameZoomFactor;
 		int id = 0;
 		if (iMouseState == GLFW_PRESS) {
-			CCEGLView::sharedOpenGLView()->handleTouchesBegin(1, &id, &oPoint.x, &oPoint.y);
+			pEGLView->handleTouchesBegin(1, &id, &oPoint.x, &oPoint.y);
 
 		} else if (iMouseState == GLFW_RELEASE) {
-			CCEGLView::sharedOpenGLView()->handleTouchesEnd(1, &id, &oPoint.x, &oPoint.y);
+			pEGLView->handleTouchesEnd(1, &id, &oPoint.x, &oPoint.y);
 		}
 	}
 }
@@ -135,10 +139,13 @@ void mousePosEventHandle(int iPosX,int iPosY) {
 
 	//to test move
 	if (iButtonState == GLFW_PRESS) {
-	      int id = 0;
-	      float x = (float)iPosX;
-	      float y = (float)iPosY;
-	      CCEGLView::sharedOpenGLView()->handleTouchesMove(1, &id, &x, &y);
+            CCEGLView* pEGLView = CCEGLView::sharedOpenGLView();
+            int id = 0;
+            float x = (float)iPosX;
+            float y = (float)iPosY;
+            x /= pEGLView->m_fFrameZoomFactor;
+            y /= pEGLView->m_fFrameZoomFactor;
+            pEGLView->handleTouchesMove(1, &id, &x, &y);
 	}
 }
 
@@ -234,6 +241,21 @@ void CCEGLView::setFrameSize(float width, float height)
 	}
 }
 
+void CCEGLView::setFrameZoom(float fZoomFactor)
+{
+    m_fFrameZoomFactor = fZoomFactor;
+    glfwSetWindowSize(m_obScreenSize.width * fZoomFactor, m_obScreenSize.height * fZoomFactor);
+    CCDirector::sharedDirector()->setProjection(CCDirector::sharedDirector()->getProjection());
+}
+
+void CCEGLView::setViewPortInPoints(float x , float y , float w , float h)
+{
+    glViewport((GLint)(x * m_fScaleX * m_fFrameZoomFactor+ m_obViewPortRect.origin.x * m_fFrameZoomFactor),
+        (GLint)(y * m_fScaleY * m_fFrameZoomFactor + m_obViewPortRect.origin.y * m_fFrameZoomFactor),
+        (GLsizei)(w * m_fScaleX * m_fFrameZoomFactor),
+        (GLsizei)(h * m_fScaleY * m_fFrameZoomFactor));
+}
+
 bool CCEGLView::isOpenGLReady()
 {
 	return bIsInit;

cocos2dx/platform/linux/CCEGLView.h

@@ -32,6 +32,11 @@ public:
 	 * iDepth is not the buffer depth of opengl, it indicate how may bits for a pixel
 	 */
 	virtual void setFrameSize(float width, float height);
+	virtual void setViewPortInPoints(float x , float y , float w , float h);
+	/*
+	 * Set zoom factor for frame. This method is for debugging big resolution (e.g.new ipad) app on desktop.
+	 */
+	void setFrameZoom(float fZoomFactor);
 	virtual bool isOpenGLReady();
 	virtual void end();
 	virtual void swapBuffers();
@@ -42,13 +47,13 @@ public:
 	 */
 	static CCEGLView* sharedOpenGLView();
 private:
-    bool initGL();
-    void destroyGL();
+	bool initGL();
+	void destroyGL();
 private:
-	bool m_bCaptured;
 	//store current mouse point for moving, valid if and only if the mouse pressed
 	CCPoint m_mousePoint;
 	bool bIsInit;
+	float m_fFrameZoomFactor;
 };
 
 NS_CC_END

samples/HelloCpp/proj.linux/main.cpp

@@ -29,6 +29,9 @@ int main(int argc, char **argv)
     AppDelegate app;
     CCApplication::sharedApplication()->setResourceRootPath(resourcePath.c_str());
     CCEGLView* eglView = CCEGLView::sharedOpenGLView();
-    eglView->setFrameSize(960, 640);
+    eglView->setFrameSize(2048, 1536);
+    // The resolution of ipad3 is very large. In general, PC's resolution is smaller than it.
+    // So we need to invoke 'setFrameZoom'(only valid on desktop(win32, mac, linux)) to make the window smaller.
+    eglView->setFrameZoom(0.4f);
     return CCApplication::sharedApplication()->run();
 }