protected unsafe override void DoInitialize()
{
base.DoInitialize();
// pbr: generate a 2D LUT from the BRDF equations used.
// then re-configure capture framebuffer object and render screen-space quad with BRDF shader.
// pbr: setup framebuffer
var captureFBO = new Framebuffer(512, 512);
captureFBO.Bind();
var captureRBO = new Renderbuffer(512, 512, GL.GL_DEPTH_COMPONENT24);
captureFBO.Attach(FramebufferTarget.Framebuffer, captureRBO, AttachmentLocation.Depth);
captureFBO.Attach(FramebufferTarget.Framebuffer, this.texBRDF, 0u);
captureFBO.CheckCompleteness();
captureFBO.Unbind();
RenderMethod method = this.RenderUnit.Methods[0];
ViewportSwitch viewportSwitch = new ViewportSwitch(0, 0, 512, 512);
viewportSwitch.On();
captureFBO.Bind();
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
method.Render();
captureFBO.Unbind();
viewportSwitch.Off();
captureFBO.Dispose();
this.texBRDF.GetImage(512, 512).Save(string.Format("texBRDF.png"));
}
protected override void OnLoad()
{
base.OnLoad();
// initialize and bind framebuffer
_framebuffer = new Framebuffer();
_framebuffer.Bind(FramebufferTarget.Framebuffer);
// initialize a renderbuffer and bind it to the depth attachment
// to support depth testing while rendering to the texture
_depthBuffer = new Renderbuffer();
_depthBuffer.Init(RenderbufferStorage.DepthComponent, FramebufferWidth, FramebufferHeight);
_framebuffer.Attach(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, _depthBuffer);
// initialize texture and bind it to the color attachment
_texture = new Texture2D(SizedInternalFormat.Rgba8, FramebufferWidth, FramebufferHeight, 1);
_framebuffer.Attach(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, _texture);
Framebuffer.Unbind(FramebufferTarget.Framebuffer);
// initialize shaders
_colorProgram = ProgramFactory.Create <SimpleColorProgram>();
_textureProgram = ProgramFactory.Create <SimpleTextureProgram>();
// initialize demonstration geometry
_cube = ShapeBuilder.CreateColoredCube(_colorProgram.InPosition, _colorProgram.InColor);
_quad = ShapeBuilder.CreateTexturedQuad(_textureProgram.InPosition, _textureProgram.InTexCoord);
// set camera position
ActiveCamera.Position = new Vector3(0, 0, 3);
// enable depth testing
GL.Enable(EnableCap.DepthTest);
}
private Framebuffer CreateFramebuffer(int width, int height)
{
var framebuffer = new Framebuffer(width, height);
framebuffer.Bind();
{
var texture = new Texture(new TexImageBitmap(width, height),
new TexParameteri(TexParameter.PropertyName.TextureWrapS, (int)GL.GL_REPEAT),
new TexParameteri(TexParameter.PropertyName.TextureWrapT, (int)GL.GL_REPEAT),
new TexParameteri(TexParameter.PropertyName.TextureWrapR, (int)GL.GL_REPEAT),
new TexParameteri(TexParameter.PropertyName.TextureMinFilter, (int)GL.GL_LINEAR),
new TexParameteri(TexParameter.PropertyName.TextureMagFilter, (int)GL.GL_LINEAR));
texture.Initialize();
framebuffer.Attach(FramebufferTarget.Framebuffer, texture, 0u);// 0
this.texture = texture;
}
{
var renderbuffer = new Renderbuffer(width, height, GL.GL_DEPTH_COMPONENT24);
framebuffer.Attach(FramebufferTarget.Framebuffer, renderbuffer, AttachmentLocation.Depth); // special
}
framebuffer.SetDrawBuffer(GL.GL_COLOR_ATTACHMENT0); // as in 0 in framebuffer.Attach(FramebufferTarget.Framebuffer, texture, 0u);// 0
framebuffer.CheckCompleteness();
framebuffer.Unbind();
return(framebuffer);
}
private void SetUpRboDepth(int width, int height)
{
// Render buffer for the depth attachment, which is necessary for depth testing.
Renderbuffer rboDepth = new Renderbuffer(width, height, RenderbufferStorage.DepthComponent);
AddAttachment(FramebufferAttachment.DepthAttachment, rboDepth);
}
private Framebuffer CreateFramebuffer(int width, int height)
{
var framebuffer = new Framebuffer(width, height);
framebuffer.Bind();
for (uint location = 0; location < 4; location++)
{
var texture = new Texture(new TexImageBitmap(width, height),
new TexParameteri(TexParameter.PropertyName.TextureWrapS, (int)GL.GL_REPEAT),
new TexParameteri(TexParameter.PropertyName.TextureWrapT, (int)GL.GL_REPEAT),
new TexParameteri(TexParameter.PropertyName.TextureWrapR, (int)GL.GL_REPEAT),
new TexParameteri(TexParameter.PropertyName.TextureMinFilter, (int)GL.GL_LINEAR),
new TexParameteri(TexParameter.PropertyName.TextureMagFilter, (int)GL.GL_LINEAR));
texture.Initialize();
framebuffer.Attach(FramebufferTarget.Framebuffer, texture, location);
this.outTextures[location] = texture;
}
{
this.BindingTexture = this.outTextures[0];
}
{
var renderbuffer = new Renderbuffer(width, height, GL.GL_DEPTH_COMPONENT24);
framebuffer.Attach(FramebufferTarget.Framebuffer, renderbuffer, AttachmentLocation.Depth);// special
}
//framebuffer.SetDrawBuffer(GL.GL_COLOR_ATTACHMENT0 + 1);// as in 1 in framebuffer.Attach(FramebufferTarget.Framebuffer, texture, 1u);// 1
framebuffer.SetDrawBuffers(
GL.GL_COLOR_ATTACHMENT0, GL.GL_COLOR_ATTACHMENT0 + 1, GL.GL_COLOR_ATTACHMENT0 + 2, GL.GL_COLOR_ATTACHMENT0 + 3);
framebuffer.CheckCompleteness();
framebuffer.Unbind();
return(framebuffer);
}
protected unsafe override void DoInitialize()
{
base.DoInitialize();
// pbr: run a quasi monte-carlo simulation on the environment lighting to create a prefilter (cube)map.
const uint maxMipLevels = 5;
var viewport = new ViewportSwitch();
for (int mip = 0; mip < maxMipLevels; ++mip)
{
// reisze framebuffer according to mip-level size.
int mipWidth = (int)(128 * Math.Pow(0.5, mip));
int mipHeight = (int)(128 * Math.Pow(0.5, mip));
var captureFBO = new Framebuffer(mipWidth, mipHeight);
captureFBO.Bind();
var captureRBO = new Renderbuffer(mipWidth, mipHeight, GL.GL_DEPTH_COMPONENT24);
captureFBO.Attach(FramebufferTarget.Framebuffer, captureRBO, AttachmentLocation.Depth);
captureFBO.CheckCompleteness();
captureFBO.Unbind();
viewport.Width = mipWidth; viewport.Height = mipHeight;
viewport.On();
// NOTE: I added '/ 10' to make it a clearer visual effect.
float roughness = (float)mip / (float)(maxMipLevels - 1) / 5;
RenderMethod method = this.RenderUnit.Methods[0];
ShaderProgram program = method.Program;
program.SetUniform("roughness", roughness);
program.SetUniform("projection", captureProjection);
program.SetUniform("environmentMap", this.envCubemap);
for (uint i = 0; i < 6; ++i)
{
program.SetUniform("view", captureViews[i]);
CubemapFace face = (CubemapFace)(GL.GL_TEXTURE_CUBE_MAP_POSITIVE_X + i);
uint location = 0;
//int level = 0;
captureFBO.Bind();
captureFBO.Attach(FramebufferTarget.Framebuffer, location, face, this.prefilterMap, mip);
captureFBO.CheckCompleteness();
captureFBO.Unbind();
captureFBO.Bind();
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
method.Render();
captureFBO.Unbind();
this.prefilterMap.GetImage(face, mipWidth, mipHeight, mip).Save(string.Format("prefilter.{0}.mip{1}.png", face, mip));
}
viewport.Off();
captureFBO.Dispose();
}
}
public UIRender(Renderbuffer renderBuffer)
{
this._screenSize = renderBuffer.Size;
_context = GL.GetCurrent(true);
_shader = new UIShader();
_renderBuffer = renderBuffer;
_framebuffer = new Framebuffer(_screenSize);
_framebuffer.AttachRenderbuffer(FramebufferAttachment.ColorAttachment0, renderBuffer);
_idTexture = _framebuffer.AddColorTexture(Core.FramebufferAttachment.ColorAttachment1, PixelInternalFormat.R32ui, PixelFormat.Red);
_framebuffer.CheckStatus(true);
}
private Framebuffer InitFramebuffer(int width, int height, Texture texture)
{
var framebuffer = new Framebuffer(width, height);
framebuffer.Bind();
framebuffer.Attach(FramebufferTarget.Framebuffer, texture, 0u);
{
var depthBuffer = new Renderbuffer(width, height, GL.GL_DEPTH_COMPONENT24);
framebuffer.Attach(FramebufferTarget.Framebuffer, depthBuffer, AttachmentLocation.Depth);
}
framebuffer.CheckCompleteness();
framebuffer.Unbind();
return(framebuffer);
}
private Framebuffer InitFramebuffer(int texWidth, int texHeight)
{
var framebuffer = new Framebuffer();
framebuffer.Bind();
Texture texture = this.backface2DTexture;
framebuffer.Attach(texture);
Renderbuffer depthBuffer = Renderbuffer.CreateDepthbuffer(texWidth, texHeight, DepthComponentType.DepthComponent);
framebuffer.Attach(depthBuffer);
framebuffer.Unbind();
return(framebuffer);
}
private void OnLoad(object sender, EventArgs e)
{
// initialize and bind framebuffer
_framebuffer = new Framebuffer();
_framebuffer.Bind(FramebufferTarget.Framebuffer);
// initialize a renderbuffer and bind it to the depth attachment
// to support depth testing while rendering to the texture
_depthBuffer = new Renderbuffer();
_depthBuffer.Init(RenderbufferStorage.DepthComponent, FramebufferWidth, FramebufferHeight);
_framebuffer.Attach(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, _depthBuffer);
// initialize texture and bind it to the color attachment
_texture = new Texture2D(SizedInternalFormat.Rgba8, FramebufferWidth, FramebufferHeight, 1);
_framebuffer.Attach(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, _texture);
Framebuffer.Unbind(FramebufferTarget.Framebuffer);
// initialize demonstration geometry
_cube = new ColorCube();
_cube.UpdateBuffers();
_quad = new TexturedQuad();
_quad.UpdateBuffers();
// initialize shaders
_colorProgram = ProgramFactory.Create <SimpleColorProgram>();
_textureProgram = ProgramFactory.Create <SimpleTextureProgram>();
// set up vertex attributes for the cube
_cubeVao = new VertexArray();
_cubeVao.Bind();
_cubeVao.BindAttribute(_colorProgram.InPosition, _cube.VertexBuffer);
_cubeVao.BindAttribute(_colorProgram.InColor, _cube.ColorBuffer);
_cubeVao.BindElementBuffer(_cube.IndexBuffer);
// set up vertex attributes for the quad
_quadVao = new VertexArray();
_quadVao.Bind();
_quadVao.BindAttribute(_textureProgram.InPosition, _quad.VertexBuffer);
_quadVao.BindAttribute(_textureProgram.InTexCoord, _quad.TexCoordBuffer);
// set camera position
Camera.DefaultState.Position = new Vector3(0, 0, 3);
Camera.ResetToDefault();
// enable depth testing
GL.Enable(EnableCap.DepthTest);
}
protected unsafe override void DoInitialize()
{
base.DoInitialize();
ViewportSwitch viewportSwitch = new ViewportSwitch(0, 0, 512, 512);
// pbr: setup framebuffer
var captureFBO = new Framebuffer(512, 512);
captureFBO.Bind();
var captureRBO = new Renderbuffer(512, 512, GL.GL_DEPTH_COMPONENT24);
captureFBO.Attach(FramebufferTarget.Framebuffer, captureRBO, AttachmentLocation.Depth);
captureFBO.CheckCompleteness();
captureFBO.Unbind();
// pbr: convert HDR equirectangular environment map to cubemap equivalent
RenderMethod method = this.RenderUnit.Methods[0];
ShaderProgram program = method.Program;
program.SetUniform("equirectangularMap", this.texHDR);
program.SetUniform("projection", captureProjection);
viewportSwitch.On();
for (uint i = 0; i < 6; ++i)
{
program.SetUniform("view", captureViews[i]);
CubemapFace face = (CubemapFace)(GL.GL_TEXTURE_CUBE_MAP_POSITIVE_X + i);
uint location = 0;
int level = 0;
captureFBO.Bind();
captureFBO.Attach(FramebufferTarget.Framebuffer, location, face, this.environmentMap, level);
captureFBO.CheckCompleteness();
captureFBO.Unbind();
captureFBO.Bind();
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
method.Render();
captureFBO.Unbind();
this.environmentMap.GetImage(face, 512, 512).Save(string.Format("texEnvCubemap.{0}.mip{1}.png", face, 0));
}
viewportSwitch.Off();
captureFBO.Dispose();
this.environmentMap.Bind();
glGenerateMipmap(GL.GL_TEXTURE_CUBE_MAP);
this.environmentMap.Unbind();
}
internal void ReinitializeImageBuffers()
{
if (image_effect_fbo != null)
{
image_effect_fbo.Dispose();
image_effect_depthbuffer.Dispose();
image_effect_colorbuffer.Dispose();
image_effect_brigthnessbuffer.Dispose();
}
// image effect stuff:
image_effect_fbo = new Framebuffer();
// depth buffer
image_effect_depthbuffer = new Renderbuffer(RenderbufferStorage.DepthComponent, Game.window.Width, Game.window.Height);
image_effect_fbo.attach(FramebufferAttachment.DepthAttachment, image_effect_depthbuffer);
// color buffer
image_effect_colorbuffer = new Texture2D(Game.window.Width, Game.window.Height)
{
filter = Filter.Linear,
wrap = WrapMode.ClampToEdge,
internal_format = PixelInternalFormat.Rgba16f
};
image_effect_colorbuffer.apply(genMipMap: false);
image_effect_fbo.attach(FramebufferAttachment.ColorAttachment0, image_effect_colorbuffer);
// brightness buffer
image_effect_brigthnessbuffer = new Texture2D(Game.window.Width, Game.window.Height)
{
filter = Filter.Linear,
wrap = WrapMode.ClampToEdge,
internal_format = PixelInternalFormat.Rgba16f
};
image_effect_brigthnessbuffer.apply(genMipMap: false);
image_effect_fbo.attach(FramebufferAttachment.ColorAttachment1, image_effect_brigthnessbuffer);
image_effect_fbo.draw_buffers(DrawBuffersEnum.ColorAttachment0, DrawBuffersEnum.ColorAttachment1);
Console.WriteLine("reinit of main framebuffer " + Game.window.Width + ", " + Game.window.Height + " status: " + image_effect_fbo.status);
}
protected override void DoInitialize()
{
base.DoInitialize();
{
var texture = new Texture(TextureTarget.Texture2D,
new NullImageFiller(TEXTURE_SIZE, TEXTURE_SIZE, OpenGL.GL_RGB, OpenGL.GL_RGB, OpenGL.GL_UNSIGNED_BYTE),
new SamplerParameters(
TextureWrapping.Repeat,
TextureWrapping.Repeat,
TextureWrapping.Repeat,
TextureFilter.Linear,
TextureFilter.Linear));
texture.ActiveTextureIndex = 1;
texture.Initialize();
this.mirrorTexture = texture;
}
{
Renderbuffer depthBuffer = Renderbuffer.CreateDepthbuffer(TEXTURE_SIZE, TEXTURE_SIZE, DepthComponentType.DepthComponent);
var framebuffer = new Framebuffer();
framebuffer.Bind();
framebuffer.Attach(this.mirrorTexture);
framebuffer.Attach(depthBuffer);
framebuffer.CheckCompleteness();
this.framebuffer = framebuffer;
}
{
mat4 view = glm.lookAt(new vec3(0.0f, 0.0f, 5.0f), new vec3(0.0f, 0.0f, 0.0f), new vec3(0.0f, 1.0f, 0.0f));
this.SetUniform("u_modelViewMatrix", view);
mat4 projection = glm.ortho(-(float)TEXTURE_SIZE / 2, (float)TEXTURE_SIZE / 2, -(float)TEXTURE_SIZE / 2, (float)TEXTURE_SIZE / 2, 1.0f, 100.0f);
this.SetUniform("u_projectionMatrix", projection);
this.SetUniform("u_waterPlaneLength", (float)this.waterPlaneLength);
}
this.viewportSwitch = new ViewportSwitch(0, 0, TEXTURE_SIZE, TEXTURE_SIZE);
}
protected override void DoInitialize()
{
// init textures.
this.envCubeMap = LoadEnvCubeMap();
this.irradianceMap = LoadIrradianceMap();
this.prefliterMap = LoadPrefliterMap();
this.brdfLUTTexture = LoadBRDFTexture();
//this.hdrTexture = LoadHdrEnvironmentMap(@"Texture\hdr\newport_loft.hdr");
this.hdrTexture = LoadHDRTexture(@"Texture\hdr\newport_loft.hdr");
//{
// Bitmap bitmap = LoadHdrFormFreeImage(@"Texture\hdr\newport_loft.hdr");
// var storage = new TexImageBitmap(bitmap, GL.GL_RGB16F);
// var texture = new Texture(storage,
// new TexParameteri(TexParameter.PropertyName.TextureWrapS, (int)GL.GL_CLAMP_TO_EDGE),
// new TexParameteri(TexParameter.PropertyName.TextureWrapT, (int)GL.GL_CLAMP_TO_EDGE),
// new TexParameteri(TexParameter.PropertyName.TextureMinFilter, (int)GL.GL_LINEAR),
// new TexParameteri(TexParameter.PropertyName.TextureMagFilter, (int)GL.GL_LINEAR));
// texture.Initialize();
// this.hdrTexture = texture;
//}
this.albedoMap = LoadTexture(@"Texture\agedplanks1-albedo.png");
this.albedoMap.TextureUnitIndex = 3;
this.normalMap = LoadTexture(@"Texture\agedplanks1-normal4-ue.png");
this.normalMap.TextureUnitIndex = 4;
this.metallicMap = LoadTexture(@"Texture\agedplanks1-ao.png");
this.metallicMap.TextureUnitIndex = 5;
this.roughnessMap = LoadTexture(@"Texture\agedplanks1-roughness.png");
this.roughnessMap.TextureUnitIndex = 6;
this.aoMap = LoadTexture(@"Texture\agedplanks1-ao.png");
this.aoMap.TextureUnitIndex = 7;
this.pbrProgram.SetUniform("albedoMap", this.albedoMap);
this.pbrProgram.SetUniform("normalMap", this.normalMap);
this.pbrProgram.SetUniform("metallicMap", this.metallicMap);
this.pbrProgram.SetUniform("roughnessMap", this.roughnessMap);
this.pbrProgram.SetUniform("aoMap", this.aoMap);
//设置投影矩阵
mat4 captureProjection = glm.perspective((float)(Math.PI / 2), 1.0f, 0.1f, 20.0f);
mat4[] captureView =
{
glm.lookAt(new vec3(0, 0, 0), new vec3(1.0f, 0.0f, 0.0f), new vec3(0.0f, -1.0f, 0.0f)),
glm.lookAt(new vec3(0, 0, 0), new vec3(-1.0f, 0.0f, 0.0f), new vec3(0.0f, -1.0f, 0.0f)),
glm.lookAt(new vec3(0, 0, 0), new vec3(0.0f, 1.0f, 0.0f), new vec3(0.0f, 0.0f, 1.0f)),
glm.lookAt(new vec3(0, 0, 0), new vec3(0.0f, -1.0f, 0.0f), new vec3(0.0f, 0.0f, -1.0f)),
glm.lookAt(new vec3(0, 0, 0), new vec3(0.0f, 0.0f, 1.0f), new vec3(0.0f, -1.0f, 0.0f)),
glm.lookAt(new vec3(0, 0, 0), new vec3(0.0f, 0.0f, -1.0f), new vec3(0.0f, -1.0f, 0.0f)),
};
ViewportSwitch viewportSwitch = new ViewportSwitch(0, 0, 512, 512);
//转换HDR Equirectangular environmentMap 为 HDR cubeMap
{
//创建渲染到CubeMap的FBO
var fbo = new Framebuffer(512, 512);
fbo.Bind();
var rbo = new Renderbuffer(512, 512, GL.GL_DEPTH_COMPONENT24);
fbo.Attach(FramebufferTarget.Framebuffer, rbo, AttachmentLocation.Depth);
fbo.CheckCompleteness();
fbo.Unbind();
viewportSwitch.On();
ShaderProgram program = this.equiRectangular2CubemapProgram;
program.SetUniform("equirectangularMap", this.hdrTexture);
program.SetUniform("ProjMatrix", captureProjection);
for (uint i = 0; i < 6; ++i)
{
fbo.Bind();
CubemapFace face = (CubemapFace)(GL.GL_TEXTURE_CUBE_MAP_POSITIVE_X + i);
uint location = 0;
int level = 0;
fbo.Attach(FramebufferTarget.Framebuffer, location, face, envCubeMap, level);
fbo.CheckCompleteness();
fbo.Unbind();
fbo.Bind();
program.Bind();
program.SetUniform("ViewMatrix", captureView[i]);
program.PushUniforms();
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
renderCube();
program.Unbind();
fbo.Unbind();
envCubeMap.GetImage(face, fbo.Width, fbo.Height).Save(
string.Format("envCubeMap.{0}.png", face));
}
viewportSwitch.Off();
fbo.Dispose();
}
//创建一个irradianceMap
{
var fbo = new Framebuffer(irradianceMapLength, irradianceMapLength);
fbo.Bind();
var rbo = new Renderbuffer(irradianceMapLength, irradianceMapLength, GL.GL_DEPTH_COMPONENT24);
fbo.Attach(FramebufferTarget.Framebuffer, rbo, AttachmentLocation.Depth);
fbo.CheckCompleteness();
fbo.Unbind();
//pbr:通过卷积来创建一张irradianceMap来解决diffueIntegral
viewportSwitch.Width = irradianceMapLength; viewportSwitch.Height = irradianceMapLength;
viewportSwitch.On();
ShaderProgram program = this.irradianceProgram;
program.SetUniform("environmentMap", envCubeMap);
program.SetUniform("ProjMatrix", captureProjection);
for (uint i = 0; i < 6; ++i)
{
fbo.Bind();
CubemapFace face = (CubemapFace)(GL.GL_TEXTURE_CUBE_MAP_POSITIVE_X + i);
uint location = 0;
int level = 0;
fbo.Attach(FramebufferTarget.Framebuffer, location, face, irradianceMap, level);
fbo.CheckCompleteness();
fbo.Unbind();
//vec3 color = System.Drawing.Color.SkyBlue.ToVec3();
vec3 color = System.Drawing.Color.Black.ToVec3();
fbo.Bind();
program.Bind();
program.SetUniform("ViewMatrix", captureView[i]);
program.PushUniforms();
GL.Instance.ClearColor(color.x, color.y, color.z, 1);
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
renderCube();
program.Unbind();
fbo.Unbind();
irradianceMap.GetImage(face, fbo.Width, fbo.Height).Save(
string.Format("irradianceMap.fill.{0}.png", face));
}
viewportSwitch.Off();
fbo.Dispose();
}
//对环境光用蒙特卡洛积分来创建一个prefliterMap贴图
{
ShaderProgram program = this.prefliterProgram;
program.SetUniform("environmentMap", envCubeMap);
program.SetUniform("ProjMatrix", captureProjection);
const int maxMipLevels = 5;
for (int level = 0; level < maxMipLevels; level++)
{
int mipWidth = (int)(128 * Math.Pow(0.5, level));
int mipHeight = (int)(128 * Math.Pow(0.5, level));
var fbo = new Framebuffer(mipWidth, mipHeight);
fbo.Bind();
var rbo = new Renderbuffer(mipWidth, mipHeight, GL.GL_DEPTH_COMPONENT24);
fbo.Attach(FramebufferTarget.Framebuffer, rbo, AttachmentLocation.Depth);
fbo.CheckCompleteness();
fbo.Unbind();
viewportSwitch.Width = mipWidth; viewportSwitch.Height = mipHeight;
viewportSwitch.On();
float roughness = (float)level / (float)(maxMipLevels - 1);
program.SetUniform("roughness", roughness);
for (uint j = 0; j < 6; j++)
{
program.SetUniform("ViewMatrix", captureView[level]);
fbo.Bind();
CubemapFace face = (CubemapFace)(GL.GL_TEXTURE_CUBE_MAP_POSITIVE_X + j);
uint location = 0;
fbo.Attach(FramebufferTarget.Framebuffer, location, face, prefliterMap, level);
fbo.CheckCompleteness();
fbo.Unbind();
fbo.Bind();
program.Bind();
program.PushUniforms();
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
renderCube();
program.Unbind();
fbo.Unbind();
prefliterMap.GetImage(face, fbo.Width, fbo.Height, level).Save(
string.Format("prefliterMap.{0}.{1}.png", level, face));
}
viewportSwitch.Off();
fbo.Dispose();
}
program.Unbind();
}
{
var fbo = new Framebuffer(512, 512);
fbo.Bind();
var rbo = new Renderbuffer(512, 512, GL.GL_DEPTH_COMPONENT24);
fbo.Attach(FramebufferTarget.Framebuffer, rbo, AttachmentLocation.Depth);
fbo.Attach(FramebufferTarget.Framebuffer, brdfLUTTexture, 0u);
fbo.CheckCompleteness();
fbo.Unbind();
fbo.Bind();
viewportSwitch.Width = 512; viewportSwitch.Height = 512;
viewportSwitch.On();
ShaderProgram program = this.brdfProgram;
program.Bind();
program.PushUniforms();
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
renderQuad();
program.Unbind();
viewportSwitch.Off();
fbo.Unbind();
fbo.Dispose();
brdfLUTTexture.GetImage(fbo.Width, fbo.Height).Save(
string.Format("BRDF.GetImage.png"));
}
}
/// <summary>
///
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="internalFormat"></param>
/// <returns></returns>
public static Renderbuffer CreateColorbuffer(int width, int height, uint internalFormat = GL.GL_RGBA)
{
var renderbuffer = new Renderbuffer(width, height, internalFormat);
return(renderbuffer);
}
/// <summary>
///
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="internalFormat"></param>
/// <returns></returns>
public static Renderbuffer CreateDepthbuffer(int width, int height, uint internalFormat = GL.GL_DEPTH_COMPONENT)
{
var renderbuffer = new Renderbuffer(width, height, internalFormat);
return(renderbuffer);
}
public partial void ExtGetRenderbuffers([Count(Parameter = "maxRenderbuffers"), Flow(FlowDirection.Out)] out Renderbuffer renderbuffers, [Flow(FlowDirection.In)] int maxRenderbuffers, [Count(Count = 1), Flow(FlowDirection.Out)] out int numRenderbuffers);
/// <summary>
///
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="internalFormat"></param>
/// <returns></returns>
public static Renderbuffer CreateDepthbuffer(int width, int height, uint internalFormat = OpenGL.GL_DEPTH_COMPONENT)
{
var renderbuffer = new Renderbuffer(width, height, internalFormat, RenderbufferType.DepthBuffer);
return renderbuffer;
}
/// <summary>
///
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="internalFormat"></param>
/// <returns></returns>
public static Renderbuffer CreateColorbuffer(int width, int height, uint internalFormat = OpenGL.GL_RGBA)
{
var renderbuffer = new Renderbuffer(width, height, internalFormat, RenderbufferType.ColorBuffer);
return renderbuffer;
}
public void RenderbufferObject()
{
Renderbuffer glObject = new Renderbuffer(1, 1, RenderbufferStorage.Rgba16);
Assert.AreEqual($"RenderbufferObject ID: {glObject.Id}", glObject.ToString());
}