void Canvas::clip(const glm::mat4& transform, VertexArrayPtr pVA, GLenum stencilOp)
{
// Disable drawing to color buffer
glColorMask(0, 0, 0, 0);
// Enable drawing to stencil buffer
glStencilMask(~0);
// Draw clip rectangle into stencil buffer
glStencilFunc(GL_ALWAYS, 0, 0);
glStencilOp(stencilOp, stencilOp, stencilOp);
StandardShaderPtr pShader = GLContext::getCurrent()->getStandardShader();
pShader->setUntextured();
pShader->activate();
glLoadMatrixf(glm::value_ptr(transform));
pVA->draw();
// Set stencil test to only let
glStencilFunc(GL_LEQUAL, m_ClipLevel, ~0);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
// Disable drawing to stencil buffer
glStencilMask(0);
// Enable drawing to color buffer
glColorMask(~0, ~0, ~0, ~0);
}
void Canvas::renderOutlines(GLContext* pContext, const glm::mat4& transform)
{
VertexArrayPtr pVA = GLContextManager::get()->createVertexArray();
pVA->initForGLContext(pContext);
pContext->setBlendMode(GLContext::BLEND_BLEND, false);
m_pRootNode->renderOutlines(pVA, Pixel32(0,0,0,0));
StandardShader* pShader = pContext->getStandardShader();
pShader->setTransform(transform);
pShader->setUntextured();
pShader->setAlpha(0.5f);
pShader->activate();
if (pVA->getNumVerts() != 0) {
pVA->draw(pContext);
}
}
