private void MakeVAO()
{
vbo_xy = new BufferObject <float>(quad_xy, BufferTarget.ArrayBuffer);
ebo_ix = new BufferObject <byte>(quad_el, BufferTarget.ElementArrayBuffer);
vao = new VertexArrayObject();
vao.Bind();
vbo_xy.Bind();
vao.SetAttrib(0, 2, VertexAttribPointerType.Float);
int stride = this.InstanceStride;
var vbo = this.VBO;
vbo.Bind();
vao.SetAttrib(1, 4, VertexAttribPointerType.Float, false, stride, 0, 1);
vao.SetAttrib(2, 4, VertexAttribPointerType.Float, false, stride, 16, 1);
vao.SetAttrib(3, 4, VertexAttribPointerType.Float, false, stride, 32, 1);
vao.SetAttrib(4, 4, VertexAttribPointerType.Float, false, stride, 48, 1);
vao.SetAttrib(5, 4, VertexAttribPointerType.UnsignedByte, true, stride, 64, 1);
vbo.Unbind();
vao.Enable(0);
vao.Enable(1);
vao.Enable(2);
vao.Enable(3);
vao.Enable(4);
vao.Enable(5);
vao.Unbind();
}
protected override void BeginSubmit(FrameBuffer renderTarget)
{
var projection = renderTarget.Projection;
program.Bind();
GL.UniformMatrix4(program["projection"], false, ref projection);
vao.Bind();
ebo_ix.Bind();
}
private void Blit(FrameBuffer src, FrameBuffer dst)
{
dst.SetViewport();
dst.Bind();
GL.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.ActiveTexture(TextureUnit.Texture0);
src.ColorAttachment.Bind();
ppVao.Bind();
ppEbo.Bind();
GL.DrawElements(BeginMode.Triangles, 6, DrawElementsType.UnsignedByte, 0);
ppEbo.Unbind();
ppVao.Unbind();
src.ColorAttachment.Unbind();
}
protected override void BeginSubmit(FrameBuffer renderTarget)
{
GL.ActiveTexture(TextureUnit.Texture1);
GL.BindTexture(TextureTarget.Texture2D, paletteTexture.Handle);
// prepare the program
var projection = renderTarget.Projection;
program.Bind();
GL.UniformMatrix4(program["projection"], false, ref projection);
// tell the program on which texture units the textures are
GL.Uniform1(program["sprite"], 0);
GL.Uniform1(program["palette"], 1);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.One, BlendingFactorDest.OneMinusSrcAlpha);
vao.Bind();
ebo_ix.Bind();
}
/// Constructor.
public Renderer(Display display)
{
this.display = display;
this.spriteBatch = new SpriteBatch(
LoadShaderProgram("vert.glsl", "frag.glsl"),
2048
);
this.rectangleBatch = new RectangleBatch(
LoadShaderProgram("rect.v.glsl", "rect.f.glsl"),
256
);
vboQuadPosition = new BufferObject <float>(quad_xy, BufferTarget.ArrayBuffer);
vboQuadTexcoord = new BufferObject <float>(quad_uv, BufferTarget.ArrayBuffer);
ppVao = new VertexArrayObject();
ppVao.Bind();
vboQuadPosition.Bind();
ppVao.SetAttrib(0, 2, VertexAttribPointerType.Float);
vboQuadTexcoord.Bind();
ppVao.SetAttrib(1, 2, VertexAttribPointerType.Float);
ppVao.Enable(0);
ppVao.Enable(1);
ppVao.Unbind();
ppEbo = new BufferObject <byte>(quad_ix, BufferTarget.ElementArrayBuffer);
frameBuffers = new FrameBuffer[2];
frameBuffers[0] = new FrameBuffer(display.Resolution, PixelFormat.Rgba);
frameBuffers[1] = new FrameBuffer(display.Resolution, PixelFormat.Rgba);
activeFramebuffer = 0;
this.screenBuffer = new FrameBuffer(display.Viewport);
this.blit = LoadShaderProgram("blit.v.glsl", "blit.f.glsl");
this.gray = LoadShaderProgram("blit.v.glsl", "gray.f.glsl");
screenBuffer.SetViewport();
}