CCGrabber::CCGrabber(void)
: m_fbo(0)
, m_oldFBO(0)
{
// generate FBO
ccglGenFramebuffers(1, &m_fbo);
}
bool CCRenderTexture::initWithWidthAndHeight(int w, int h, CCTexture2DPixelFormat eFormat)
{
bool bRet = false;
do
{
w *= (int)CC_CONTENT_SCALE_FACTOR();
h *= (int)CC_CONTENT_SCALE_FACTOR();
glGetIntegerv(GL_FRAMEBUFFER_BINDING_OES, &m_nOldFBO);
// textures must be power of two squared
unsigned int powW = ccNextPOT(w);
unsigned int powH = ccNextPOT(h);
void *data = malloc((int)(powW * powH * 4));
CC_BREAK_IF(! data);
memset(data, 0, (int)(powW * powH * 4));
m_ePixelFormat = eFormat;
m_pTexture = new CCTexture2D();
CC_BREAK_IF(! m_pTexture);
m_pTexture->initWithData(data, (CCTexture2DPixelFormat)m_ePixelFormat, powW, powH, CCSizeMake((float)w, (float)h));
free( data );
// generate FBO
ccglGenFramebuffers(1, &m_uFBO);
ccglBindFramebuffer(CC_GL_FRAMEBUFFER, m_uFBO);
// associate texture with FBO
ccglFramebufferTexture2D(CC_GL_FRAMEBUFFER, CC_GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_pTexture->getName(), 0);
// check if it worked (probably worth doing :) )
GLuint status = ccglCheckFramebufferStatus(CC_GL_FRAMEBUFFER);
if (status != CC_GL_FRAMEBUFFER_COMPLETE)
{
CCAssert(0, "Render Texture : Could not attach texture to framebuffer");
CC_SAFE_DELETE(m_pTexture);
break;
}
m_pTexture->setAliasTexParameters();
m_pSprite = CCSprite::spriteWithTexture(m_pTexture);
m_pTexture->release();
m_pSprite->setScaleY(-1);
this->addChild(m_pSprite);
ccBlendFunc tBlendFunc = {GL_ONE, GL_ONE_MINUS_SRC_ALPHA };
m_pSprite->setBlendFunc(tBlendFunc);
ccglBindFramebuffer(CC_GL_FRAMEBUFFER, m_nOldFBO);
bRet = true;
} while (0);
return bRet;
}
CCGrabber::CCGrabber(void)
{
m_fbo = 0;
m_oldFBO = 0;
// generate FBO
ccglGenFramebuffers(1, &m_fbo);
}
CCGrabber::CCGrabber(void)
: m_fbo(0)
, m_oldFBO(0)
{
m_eGlesVersion = CCConfiguration::sharedConfiguration()->getGlesVersion();
// If the gles version is lower than GLES_VER_1_0,
// all the functions in CCGrabber return directly.
if (m_eGlesVersion <= GLES_VER_1_0)
{
return ;
}
// generate FBO
ccglGenFramebuffers(1, &m_fbo);
}
