adding gameplay buffer

src/game.cpp

@@ -0,0 +1,55 @@
+#include "game.h"
+#include "content.h"
+
+using namespace TL;
+
+void Game::startup()
+{
+	// load our content
+	Content::load();
+
+	// framebuffer for the game
+	buffer = FrameBuffer::create(320, 180);
+
+	// set batcher to use Nearest Filter
+	batch.default_sampler = TextureSampler(TextureFilter::Nearest);
+}
+
+void Game::shutdown()
+{
+
+}
+
+void Game::update()
+{
+
+}
+
+void Game::render()
+{
+	// draw gameplay stuff
+	{
+		buffer->clear(Color::red);
+
+		batch.str(Content::font, "Hello World", Vec2(32, 32), Color::white);
+		batch.render(buffer);
+		batch.clear();
+	}
+
+	// draw buffer to the screen
+	{
+		float scale = Calc::min(
+			App::backbuffer->width() / (float)buffer->width(),
+			App::backbuffer->height() / (float)buffer->height());
+
+		Vec2 screen_center = Vec2(App::backbuffer->width(), App::backbuffer->height()) / 2;
+		Vec2 buffer_center = Vec2(buffer->width(), buffer->height()) / 2;
+
+		App::backbuffer->clear(Color::black);
+		batch.push_matrix(Mat3x2::create_transform(screen_center, buffer_center, Vec2::one * scale, 0));
+		batch.tex(buffer->attachment(0), Vec2::zero, Color::white);
+		batch.pop_matrix();
+		batch.render(App::backbuffer);
+		batch.clear();
+	}
+}