// Draw the SCene
void CCDirector::drawScene(void)
{
// calculate "global" dt
calculateDeltaTime();
//tick before glClear: issue #533
if (! m_bPaused)
{
CCScheduler::sharedScheduler()->tick(m_fDeltaTime);
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* to avoid flickr, nextScene MUST be here: after tick and before draw.
XXX: Which bug is this one. It seems that it can't be reproduced with v0.9 */
if (m_pNextScene)
{
setNextScene();
}
glPushMatrix();
applyOrientation();
// By default enable VertexArray, ColorArray, TextureCoordArray and Texture2D
CC_ENABLE_DEFAULT_GL_STATES();
// draw the scene
if (m_pRunningScene)
{
m_pRunningScene->visit();
}
// draw the notifications node
if (m_pNotificationNode)
{
m_pNotificationNode->visit();
}
if (m_bDisplayFPS)
{
showFPS();
}
#if CC_ENABLE_PROFILERS
showProfilers();
#endif
CC_DISABLE_DEFAULT_GL_STATES();
glPopMatrix();
m_uTotalFrames++;
// swap buffers
if (m_pobOpenGLView)
{
m_pobOpenGLView->swapBuffers();
}
}
void CCRenderTexture::begin()
{
// Save the current matrix
glPushMatrix();
const CCSize& texSize = m_pTexture->getContentSizeInPixels();
// Calculate the adjustment ratios based on the old and new projections
CCSize size = CCDirector::sharedDirector()->getDisplaySizeInPixels();
float widthRatio = size.width / texSize.width;
float heightRatio = size.height / texSize.height;
// Adjust the orthographic propjection and viewport
ccglOrtho((float)-1.0 / widthRatio, (float)1.0 / widthRatio, (float)-1.0 / heightRatio, (float)1.0 / heightRatio, -1,1);
glViewport(0, 0, (GLsizei)texSize.width, (GLsizei)texSize.height);
// CCDirector::sharedDirector()->getOpenGLView()->setViewPortInPoints(0, 0, texSize.width, texSize.height);
glGetIntegerv(CC_GL_FRAMEBUFFER_BINDING, &m_nOldFBO);
ccglBindFramebuffer(CC_GL_FRAMEBUFFER, m_uFBO);//Will direct drawing to the frame buffer created above
// Issue #1145
// There is no need to enable the default GL states here
// but since CCRenderTexture is mostly used outside the "render" loop
// these states needs to be enabled.
// Since this bug was discovered in API-freeze (very close of 1.0 release)
// This bug won't be fixed to prevent incompatibilities with code.
//
// If you understand the above mentioned message, then you can comment the following line
// and enable the gl states manually, in case you need them.
CC_ENABLE_DEFAULT_GL_STATES();
}
void CCRenderTexture::beginWithClear(float r, float g, float b, float a)
{
this->saveGLstate();
CC_DISABLE_DEFAULT_GL_STATES();
// Save the current matrix
glPushMatrix();
CCSize texSize = m_pTexture->getContentSizeInPixels();
// Calculate the adjustment ratios based on the old and new projections
CCSize size = CCDirector::sharedDirector()->getDisplaySizeInPixels();
float widthRatio = size.width / texSize.width;
float heightRatio = size.height / texSize.height;
// Adjust the orthographic propjection and viewport
ccglOrtho((float)-1.0 / widthRatio, (float)1.0 / widthRatio, (float)-1.0 / heightRatio, (float)1.0 / heightRatio, -1,1);
glViewport(0, 0, (GLsizei)texSize.width, (GLsizei)texSize.height);
glGetIntegerv(CC_GL_FRAMEBUFFER_BINDING, &m_nOldFBO);
ccglBindFramebuffer(CC_GL_FRAMEBUFFER, m_uFBO);//Will direct drawing to the frame buffer created above
glClearColor(r, g, b, a);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
CC_ENABLE_DEFAULT_GL_STATES();
}