// properties
void CCGridBase::setActive(bool bActive)
{
m_bActive = bActive;
if (! bActive)
{
CCDirector *pDirector = CCDirector::sharedDirector();
ccDirectorProjection proj = pDirector->getProjection();
pDirector->setProjection(proj);
}
}
void CCGridBase::beforeDraw(void)
{
// save projection
CCDirector *director = CCDirector::sharedDirector();
m_directorProjection = director->getProjection();
// 2d projection
// [director setProjection:kCCDirectorProjection2D];
set2DProjection();
m_pGrabber->beforeRender(m_pTexture);
}
void CCRenderTexture::end()
{
glBindFramebuffer(GL_FRAMEBUFFER, m_nOldFBO);
kmGLPopMatrix();
CCDirector *director = CCDirector::sharedDirector();
CCSize size = director->getWinSizeInPixels();
// restore viewport
glViewport(0, 0, GLsizei(size.width * CC_CONTENT_SCALE_FACTOR()), GLsizei(size.height * CC_CONTENT_SCALE_FACTOR()));
// special viewport for 3d projection + retina display
if ( director->getProjection() == kCCDirectorProjection3D && CC_CONTENT_SCALE_FACTOR() != 1 )
{
glViewport((GLsizei)(-size.width/2), (GLsizei)(-size.height/2), (GLsizei)(size.width * CC_CONTENT_SCALE_FACTOR()), (GLsizei)(size.height * CC_CONTENT_SCALE_FACTOR()));
}
director->setProjection(director->getProjection());
}
void CCRenderTexture::begin()
{
kmGLMatrixMode(KM_GL_PROJECTION);
kmGLPushMatrix();
kmGLMatrixMode(KM_GL_MODELVIEW);
kmGLPushMatrix();
CCDirector *director = CCDirector::sharedDirector();
director->setProjection(director->getProjection());
#if CC_TARGET_PLATFORM == CC_PLATFORM_WP8
kmMat4 modifiedProjection;
kmGLGetMatrix(KM_GL_PROJECTION, &modifiedProjection);
kmMat4Multiply(&modifiedProjection, CCEGLView::sharedOpenGLView()->getReverseOrientationMatrix(), &modifiedProjection);
kmGLMatrixMode(KM_GL_PROJECTION);
kmGLLoadMatrix(&modifiedProjection);
kmGLMatrixMode(KM_GL_MODELVIEW);
#endif
const CCSize& texSize = m_pTexture->getContentSizeInPixels();
// Calculate the adjustment ratios based on the old and new projections
CCSize size = director->getWinSizeInPixels();
float widthRatio = size.width / texSize.width;
float heightRatio = size.height / texSize.height;
// Adjust the orthographic projection and viewport
glViewport(0, 0, (GLsizei)texSize.width, (GLsizei)texSize.height);
kmMat4 orthoMatrix;
kmMat4OrthographicProjection(&orthoMatrix, (float)-1.0 / widthRatio, (float)1.0 / widthRatio,
(float)-1.0 / heightRatio, (float)1.0 / heightRatio, -1,1 );
kmGLMultMatrix(&orthoMatrix);
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &m_nOldFBO);
glBindFramebuffer(GL_FRAMEBUFFER, m_uFBO);
/* Certain Qualcomm Andreno gpu's will retain data in memory after a frame buffer switch which corrupts the render to the texture. The solution is to clear the frame buffer before rendering to the texture. However, calling glClear has the unintended result of clearing the current texture. Create a temporary texture to overcome this. At the end of CCRenderTexture::begin(), switch the attached texture to the second one, call glClear, and then switch back to the original texture. This solution is unnecessary for other devices as they don't have the same issue with switching frame buffers.
*/
if (CCConfiguration::sharedConfiguration()->checkForGLExtension("GL_QCOM"))
{
// -- bind a temporary texture so we can clear the render buffer without losing our texture
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_pTextureCopy->getName(), 0);
CHECK_GL_ERROR_DEBUG();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_pTexture->getName(), 0);
}
}
