C++ Primitive::GetViewport方法代码示例

void VertexArrayRenderer::RefreshArray() {
	SortPrimitives();

	m_vertex_data.clear();
	m_color_data.clear();
	m_texture_data.clear();
	m_index_data.clear();

	m_vertex_data.reserve( m_vertex_count );
	m_color_data.reserve( m_vertex_count );
	m_texture_data.reserve( m_vertex_count );
	m_index_data.reserve( m_index_count );

	m_batches.clear();

	m_last_vertex_count = 0;
	m_last_index_count = 0;

	auto primitives_size = m_primitives.size();

	// Default viewport
	Batch current_batch;
	current_batch.viewport = m_default_viewport;
	current_batch.atlas_page = 0;
	current_batch.start_index = 0;
	current_batch.index_count = 0;
	current_batch.min_index = 0;
	current_batch.max_index = static_cast<GLuint>( m_vertex_count - 1 );
	current_batch.custom_draw = false;

	sf::FloatRect window_viewport( 0.f, 0.f, static_cast<float>( m_window_size.x ), static_cast<float>( m_window_size.y ) );

	for( std::size_t primitive_index = 1; primitive_index != primitives_size + 1; primitive_index += 1 ) {
		Primitive* primitive = m_primitives[primitive_index - 1].get();

		primitive->SetSynced();

		if( !primitive->IsVisible() ) {
			continue;
		}

		sf::Vector2f position_transform( primitive->GetPosition() );

		auto viewport = primitive->GetViewport();

		std::size_t atlas_page = 0;

		auto viewport_rect = window_viewport;

		// Check if primitive needs to be rendered in a custom viewport.
		if( viewport && ( ( *viewport ) != ( *m_default_viewport ) ) ) {
			sf::Vector2f destination_origin( viewport->GetDestinationOrigin() );
			sf::Vector2f size( viewport->GetSize() );

			position_transform += ( destination_origin - viewport->GetSourceOrigin() );

			if( m_cull ) {
				viewport_rect.left = destination_origin.x;
				viewport_rect.top = destination_origin.y;
				viewport_rect.width = size.x;
				viewport_rect.height = size.y;
			}
		}

		const std::shared_ptr<Signal>& custom_draw_callback( primitive->GetCustomDrawCallback() );

		if( custom_draw_callback ) {
			// Start a new batch.
			current_batch.max_index = m_last_vertex_count ? ( static_cast<GLuint>( m_last_vertex_count ) - 1 ) : 0;
			m_batches.push_back( current_batch );

			// Mark current_batch custom draw batch.
			current_batch.viewport = viewport;
			current_batch.start_index = 0;
			current_batch.index_count = 0;
			current_batch.min_index = 0;
			current_batch.max_index = 0;
			current_batch.custom_draw = true;
			current_batch.custom_draw_callback = custom_draw_callback;

			// Start a new batch.
			m_batches.push_back( current_batch );

			// Reset current_batch to defaults.
			current_batch.viewport = m_default_viewport;
			current_batch.start_index = m_last_index_count;
			current_batch.index_count = 0;
			current_batch.min_index = m_last_vertex_count ? ( static_cast<GLuint>( m_last_vertex_count ) - 1 ) : 0;
			current_batch.custom_draw = false;
		}
		else {
			// Process primitive's vertices and indices
			const std::vector<Primitive::Vertex>& vertices( primitive->GetVertices() );
			const std::vector<GLuint>& indices( primitive->GetIndices() );

			sf::Vector2f position( 0.f, 0.f );

			sf::FloatRect bounding_rect( 0.f, 0.f, 0.f, 0.f );

			for( const auto& vertex : vertices ) {
//.........这里部分代码省略.........

void Renderer::RefreshVBO( sf::RenderWindow& window ) {
	SortPrimitives();

	m_vertex_data.clear();
	m_color_data.clear();
	m_texture_data.clear();

	m_viewport_pairs.clear();

	m_last_vertex_count = 0;

	std::size_t primitives_size = m_primitives.size();

	// Check for alpha values in all primitives.
	// Disable depth test if any found.
	for( std::size_t primitive_index = 0; primitive_index < primitives_size; ++primitive_index ) {
		const std::vector<Primitive::Vertex>& vertices( m_primitives[primitive_index]->GetVertices() );

		std::size_t vertices_size = vertices.size();

		for( std::size_t vertex_index = 0; vertex_index < vertices_size; ++vertex_index ) {
			const Primitive::Vertex& vertex( vertices[vertex_index] );

			if( m_depth_clear_strategy && ( vertex.color.a < 255 ) ) {
#ifdef SFGUI_DEBUG
				std::cerr << "Detected alpha value " << static_cast<int>( vertex.color.a ) << " disabling depth test.\n";
#endif
				m_depth_clear_strategy = NO_DEPTH;
			}
		}
	}

	// Used to normalize texture coordinates.
	sf::Vector2f normalizer( 1.f / static_cast<float>( m_texture_atlas.getWidth() ), 1.f / static_cast<float>( m_texture_atlas.getHeight() ) );

	// Depth test vars
	float depth = -4.f;
	float depth_delta = 4.f / static_cast<float>( primitives_size );
	int direction = m_depth_clear_strategy ? -1 : 1;
	int start = static_cast<int>( m_depth_clear_strategy ? primitives_size : 1 );
	std::size_t end = m_depth_clear_strategy ? 0 : primitives_size + 1;

	RendererViewport::Ptr current_viewport = m_default_viewport;
	m_viewport_pairs.push_back( ViewportPair( m_default_viewport, 0 ) );

	sf::FloatRect window_viewport( 0.f, 0.f, static_cast<float>( window.getSize().x ), static_cast<float>( window.getSize().y ) );

	for( std::size_t primitive_index = start; primitive_index != end; primitive_index += direction ) {
		Primitive* primitive = m_primitives[primitive_index - 1].get();

		primitive->SetSynced();

		if( !primitive->IsVisible() ) {
			continue;
		}

		sf::Vector2f position_transform( primitive->GetPosition() );

		// Check if primitive needs to be rendered in a custom viewport.
		RendererViewport::Ptr viewport = primitive->GetViewport();

		if( viewport != current_viewport ) {
			current_viewport = viewport;

			ViewportPair scissor_pair( viewport, m_last_vertex_count );

			m_viewport_pairs.push_back( scissor_pair );
		}

		bool cull = m_cull;

		sf::FloatRect viewport_rect = window_viewport;

		if( viewport && ( viewport != m_default_viewport ) ) {
			sf::Vector2f destination_origin( viewport->GetDestinationOrigin() );
			sf::Vector2f size( viewport->GetSize() );

			position_transform += ( destination_origin - viewport->GetSourceOrigin() );

			if( m_cull ) {
				viewport_rect.left = destination_origin.x;
				viewport_rect.top = destination_origin.y;
				viewport_rect.width = size.x;
				viewport_rect.height = size.y;
			}
		}

		// Process primitive's vertices.
		const std::vector<Primitive::Vertex>& vertices( primitive->GetVertices() );

		std::size_t vertices_size = vertices.size();

		for( std::size_t vertex_index = 0; vertex_index < vertices_size; ++vertex_index ) {
			const Primitive::Vertex& vertex( vertices[vertex_index] );

			sf::Vector3f position( vertex.position.x + position_transform.x, vertex.position.y + position_transform.y, depth );

			m_vertex_data.push_back( position );
			m_color_data.push_back( vertex.color );

//.........这里部分代码省略.........