/// @overload QGLWidget
void initializeGL(){
printf("OpenGL %d.%d\n",this->format().majorVersion(),this->format().minorVersion());
///--- Create an array object to store properties
{
bool success = vao.create();
Q_ASSERT(success);
vao.bind();
}
///--- Load/compile shaders
{
bool vok = program.addShaderFromSourceCode(QGLShader::Vertex, vshader);
bool fok = program.addShaderFromSourceCode(QGLShader::Fragment, fshader);
bool lok = program.link ();
Q_ASSERT(lok && vok && fok);
bool success = program.bind();
Q_ASSERT(success);
}
///--- Create vertex buffer/attributes "position"
{
static float vertices[] = {
-1.0000,-1.0000,+0.0000,
+1.0000,-1.0000,+0.0000,
-1.0000,+1.0000,+0.0000,
+1.0000,+1.0000,+0.0000,};
vertexbuffer = QGLBuffer(QGLBuffer::VertexBuffer);
bool success = vertexbuffer.create();
Q_ASSERT(success);
vertexbuffer.setUsagePattern( QGLBuffer::StaticDraw );
success = vertexbuffer.bind();
Q_ASSERT(success);
vertexbuffer.allocate( vertices, sizeof(vertices) );
program.setAttributeBuffer("position", GL_FLOAT, 0, 3 );
program.enableAttributeArray("position");
}
///--- Unbind to avoid pollution
vao.release();
program.release();
///--- Background
glClearColor(1.0, 1.0, 1.0, 1.0);
///--- Setup opengl flags
glDisable(GL_DEPTH_TEST);
}
void OpenGLVideoPrivate::bindAttributes(VideoShader* shader, const QRectF &t, const QRectF &r)
{
const bool tex_rect = shader->textureTarget() == GL_TEXTURE_RECTANGLE;
// also check size change for normalizedROI computation if roi is not normalized
const bool roi_changed = valiad_tex_width != material->validTextureWidth() || roi != r || video_size != material->frameSize();
const int tc = shader->textureLocationCount();
if (roi_changed) {
roi = r;
valiad_tex_width = material->validTextureWidth();
video_size = material->frameSize();
}
if (tex_target != shader->textureTarget()) {
tex_target = shader->textureTarget();
update_geo = true;
}
QRectF& target_rect = rect;
if (target.isValid()) {
if (roi_changed || target != t) {
target = t;
update_geo = true;
}
} else {
if (roi_changed) {
update_geo = true;
}
}
if (!update_geo)
goto end;
//qDebug("updating geometry...");
geometry.setRect(target_rect, material->mapToTexture(0, roi));
if (tex_rect) {
geometry.setTextureCount(tc);
for (int i = 1; i < tc; ++i) {
// tc can > planes, but that will compute chroma plane
geometry.setTextureRect(material->mapToTexture(i, roi), i);
}
}
update_geo = false;
if (!try_vbo)
goto end;
{ //VAO scope BEGIN
#if QT_VAO
if (try_vao) {
//qDebug("updating vao...");
if (!vao.isCreated()) {
if (!vao.create()) {
try_vao = false;
qDebug("VAO is not supported");
}
}
}
QOpenGLVertexArrayObject::Binder vao_bind(&vao);
Q_UNUSED(vao_bind);
#endif
if (!vbo.isCreated()) {
if (!vbo.create()) {
try_vbo = false; // not supported by OpenGL
try_vao = false; // also disable VAO. destroy?
qWarning("VBO is not supported");
goto end;
}
}
//qDebug("updating vbo...");
vbo.bind(); //check here
vbo.allocate(geometry.data(), geometry.size());
#if QT_VAO
if (try_vao) {
shader->program()->setAttributeBuffer(0, GL_FLOAT, 0, geometry.tupleSize(), geometry.stride());
shader->program()->setAttributeBuffer(1, GL_FLOAT, geometry.tupleSize()*sizeof(float), geometry.tupleSize(), geometry.stride());
if (tex_rect) {
for (int i = 1; i < tc; ++i) {
shader->program()->setAttributeBuffer(i + 1, GL_FLOAT, i*geometry.textureSize() + geometry.tupleSize()*sizeof(float), geometry.tupleSize(), geometry.stride());
}
}
char const *const *attr = shader->attributeNames();
for (int i = 0; attr[i]; ++i) {
shader->program()->enableAttributeArray(i); //TODO: in setActiveShader
}
}
#endif
vbo.release();
} //VAO scope END
end:
#if QT_VAO
if (try_vao && vao.isCreated()) {
vao.bind();
return;
}
#endif
if (try_vbo && vbo.isCreated()) {
vbo.bind();
shader->program()->setAttributeBuffer(0, GL_FLOAT, 0, geometry.tupleSize(), geometry.stride());
shader->program()->setAttributeBuffer(1, GL_FLOAT, geometry.tupleSize()*sizeof(float), geometry.tupleSize(), geometry.stride());
if (tex_rect) {
for (int i = 1; i < tc; ++i) {
shader->program()->setAttributeBuffer(i + 1, GL_FLOAT, i*geometry.textureSize() + geometry.tupleSize()*sizeof(float), geometry.tupleSize(), geometry.stride());
}
}
} else {
shader->program()->setAttributeArray(0, GL_FLOAT, geometry.data(0), geometry.tupleSize(), geometry.stride());
shader->program()->setAttributeArray(1, GL_FLOAT, geometry.data(1), geometry.tupleSize(), geometry.stride());
if (tex_rect) {
for (int i = 1; i < tc; ++i) {
shader->program()->setAttributeArray(i + 1, GL_FLOAT, geometry.data(1), i*geometry.textureSize() + geometry.tupleSize(), geometry.stride());
}
}
}
char const *const *attr = shader->attributeNames();
for (int i = 0; attr[i]; ++i) {
shader->program()->enableAttributeArray(i); //TODO: in setActiveShader
}
}
/// @overload QGLWidget
void initializeGL(){
printf("OpenGL %d.%d\n",this->format().majorVersion(),this->format().minorVersion());
///--- Background
glClearColor(1.0, 1.0, 1.0, 1.0);
///--- Viewport (simple, for unresizeable window)
glViewport(0, 0, this->width(), this->height());
///--- Setup opengl flags
glEnable(GL_DEPTH_TEST);
///--- Create the triangle index buffer
{
assert(mesh.is_triangle_mesh());
triangles.clear();
for(auto f: mesh.faces())
for(auto v: mesh.vertices(f))
triangles.push_back(v.idx());
}
///--- Create an array object to store properties
{
bool success = vao.create();
assert(success);
vao.bind();
}
///--- Load/compile shaders
{
bool vok = program.addShaderFromSourceFile(QGLShader::Vertex, ":/vshader.glsl");
bool fok = program.addShaderFromSourceFile(QGLShader::Fragment, ":/fshader.glsl");
bool lok = program.link ();
assert(lok && vok && fok);
bool success = program.bind();
assert(success);
}
///--- Create vertex buffer/attributes "position"
{
auto vpoints = mesh.get_vertex_property<Vec3>("v:point");
bool success = vertexbuffer.create();
assert(success);
vertexbuffer.setUsagePattern( QGLBuffer::StaticDraw );
success = vertexbuffer.bind();
assert(success);
vertexbuffer.allocate( vpoints.data(), sizeof(Vec3) * mesh.n_vertices() );
program.setAttributeBuffer("vpoint", GL_FLOAT, 0, 3 );
program.enableAttributeArray("vpoint");
}
///--- Create vertex buffer/attributes "normal"
{
auto vnormal = mesh.get_vertex_property<Vec3>("v:normal");
bool success = normalbuffer.create();
assert(success);
normalbuffer.setUsagePattern( QGLBuffer::StaticDraw );
success = normalbuffer.bind();
assert(success);
normalbuffer.allocate( vnormal.data(), sizeof(Vec3) * mesh.n_vertices() );
program.setAttributeBuffer("vnormal", GL_FLOAT, 0, 3 );
program.enableAttributeArray("vnormal");
}
///--- Create the index "triangle" buffer
{
bool success = indexbuffer.create();
assert(success);
indexbuffer.setUsagePattern( QGLBuffer::StaticDraw );
success = indexbuffer.bind();
assert(success);
indexbuffer.allocate(&triangles[0], triangles.size()*sizeof(unsigned int));
}
#ifdef WITH_QGLVIEWER
///--- Setup camera
{
Box3 bbox = OpenGP::bounding_box(mesh);
camera()->setType(qglviewer::Camera::ORTHOGRAPHIC);
camera()->setSceneCenter(qglviewer::tr(bbox.center()));
camera()->setSceneRadius(bbox.diagonal().norm()/2.0);
camera()->showEntireScene();
}
#endif
///--- Unbind to avoid pollution
vao.release();
program.release();
}
