public static GLTexture2D CreateWhiteTexture(int width, int height)
{
GLTexture2D texture = new GLTexture2D();
texture.PixelInternalFormat = PixelInternalFormat.Rgba8;
texture.PixelFormat = PixelFormat.Rgba;
texture.PixelType = PixelType.UnsignedByte;
texture.Width = width; texture.Height = height;
texture.Target = TextureTarget.Texture2D;
texture.Bind();
byte[] buffer = new byte[width * height * 4];
for (int i = 0; i < width * height * 4; i++)
{
buffer[i] = 255;
}
GL.TexImage2D(TextureTarget.Texture2D, 0, texture.PixelInternalFormat,
texture.Width, texture.Height,
0, texture.PixelFormat, texture.PixelType, buffer);
texture.UpdateParameters();
texture.Unbind();
return(texture);
}
private void GenerateRender(GLContext control, EventHandler thumbnailUpdate)
{
Framebuffer frameBuffer = new Framebuffer(FramebufferTarget.Framebuffer, Width, Height);
frameBuffer.Bind();
GL.ClearColor(0, 0, 0, 0);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.Viewport(0, 0, control.Width, control.Height);
var camMtx = Camera.ViewMatrix;
var projMtx = Camera.ProjectionMatrix;
//Draw all the models into the current camera screen
// scene.Draw(control, Pass.OPAQUE);
// scene.Draw(control, Pass.TRANSPARENT);
//Disable shader and textures
GL.UseProgram(0);
GL.BindTexture(TextureTarget.Texture2D, 0);
RenderedScreen = (GLTexture2D)frameBuffer.Attachments[1];
var thumbnail = frameBuffer.ReadImagePixels(true);
//Dispose frame buffer
frameBuffer.Dispoe();
frameBuffer.DisposeRenderBuffer();
this.Thumbnail = thumbnail;
thumbnailUpdate?.Invoke(this, EventArgs.Empty);
}
public static GLTexture2D FromBitmap(Bitmap image)
{
GLTexture2D texture = new GLTexture2D();
texture.Target = TextureTarget.Texture2D;
texture.Width = image.Width; texture.Height = image.Height;
texture.LoadImage(image);
return(texture);
}
private GLTexture2D CreateColorAttachment(int width, int height, int numSamples)
{
GLTexture2D texture = GLTexture2DMultiSampled.CreateUncompressedTexture(width, height,
PixelInternalFormat, PixelFormat.Rgba, PixelType.Float);
// Don't use mipmaps for color attachments.
texture.MinFilter = TextureMinFilter.Linear;
texture.MagFilter = TextureMagFilter.Linear;
texture.UpdateParameters();
return(texture);
}
public static GLTexture2D FromBitmap(byte[] imageFile)
{
Bitmap image = (Bitmap)Bitmap.FromStream(new System.IO.MemoryStream(imageFile));
GLTexture2D texture = new GLTexture2D();
texture.Target = TextureTarget.Texture2D;
texture.Width = image.Width; texture.Height = image.Height;
texture.LoadImage(image);
return(texture);
}
public static void Init()
{
if (defaultTex != null)
{
return;
}
defaultTex = GLTexture2D.FromBitmap(Properties.Resources.DefaultTexture);
uvTestPattern = GLTexture2D.FromBitmap(Properties.Resources.UVPattern);
boneWeightGradient = GLTexture2D.FromBitmap(Properties.Resources.boneWeightGradient);
boneWeightGradient2 = GLTexture2D.FromBitmap(Properties.Resources.boneWeightGradient2);
}
public static GLTexture2D FromGeneric(STGenericTexture texture, ImageParameters parameters = null)
{
if (parameters == null)
{
parameters = new ImageParameters();
}
GLTexture2D glTexture = new GLTexture2D();
glTexture.Target = TextureTarget.Texture2D;
glTexture.Width = (int)texture.Width;
glTexture.Height = (int)texture.Height;
glTexture.LoadImage(texture, parameters);
return(glTexture);
}
public static GLTexture2D CreateFloat32Texture(int width, int height, float[] buffer)
{
GLTexture2D texture = new GLTexture2D();
texture.PixelInternalFormat = PixelInternalFormat.R32f;
texture.PixelFormat = PixelFormat.Red;
texture.PixelType = PixelType.Float;
texture.Width = width; texture.Height = height;
texture.Target = TextureTarget.Texture2D;
texture.Bind();
GL.TexImage2D(TextureTarget.Texture2D, 0, texture.PixelInternalFormat,
texture.Width, texture.Height,
0, texture.PixelFormat, texture.PixelType, buffer);
texture.UpdateParameters();
texture.Unbind();
return(texture);
}
private List <IFramebufferAttachment> CreateColorAttachments(int width, int height, int colorAttachmentsCount, int numSamples)
{
var colorAttachments = new List <IFramebufferAttachment>();
List <DrawBuffersEnum> attachmentEnums = new List <DrawBuffersEnum>();
for (int i = 0; i < colorAttachmentsCount; i++)
{
DrawBuffersEnum attachmentPoint = DrawBuffersEnum.ColorAttachment0 + i;
attachmentEnums.Add(attachmentPoint);
GLTexture2D texture = CreateColorAttachment(width, height, numSamples);
colorAttachments.Add(texture);
AddAttachment((FramebufferAttachment)attachmentPoint, texture);
}
SetDrawBuffers(attachmentEnums.ToArray());
return(colorAttachments);
}
public static GLTexture2D CreateUncompressedTexture(int width, int height,
PixelInternalFormat format = PixelInternalFormat.Rgba8,
PixelFormat pixelFormat = PixelFormat.Rgba,
PixelType pixelType = PixelType.UnsignedByte)
{
GLTexture2D texture = new GLTexture2D();
texture.PixelInternalFormat = format;
texture.PixelFormat = pixelFormat;
texture.PixelType = pixelType;
texture.Width = width; texture.Height = height;
texture.Target = TextureTarget.Texture2D;
texture.Bind();
GL.TexImage2D(TextureTarget.Texture2D, 0, format,
texture.Width, texture.Height,
0, pixelFormat, pixelType, IntPtr.Zero);
texture.UpdateParameters();
texture.Unbind();
return(texture);
}
public static GLTexture FromGenericTexture(STGenericTexture texture, ImageParameters parameters = null)
{
if (parameters == null)
{
parameters = new ImageParameters();
}
switch (texture.SurfaceType)
{
case STSurfaceType.Texture2D_Array:
return(GLTexture2DArray.FromGeneric(texture, parameters));
case STSurfaceType.Texture3D:
return(GLTexture3D.FromGeneric(texture, parameters));
case STSurfaceType.TextureCube:
return(GLTextureCube.FromGeneric(texture, parameters));
default:
return(GLTexture2D.FromGeneric(texture, parameters));
}
}
public static GLTexture2D CreateTextureRender(GLTexture texture, int arrayLevel, int mipLevel, bool force = false)
{
if (!force && cubemapCache.ContainsKey(texture.ID.ToString()))
{
return(cubemapCache[texture.ID.ToString()]);
}
else
{
if (cubemapCache.ContainsKey(texture.ID.ToString()))
{
cubemapCache[texture.ID.ToString()]?.Dispose();
}
}
int width = texture.Width * 4;
int height = texture.Height * 3;
width = 512;
height = 256;
var shader = GlobalShaders.GetShader("EQUIRECTANGULAR");
var textureOutput = GLTexture2D.CreateUncompressedTexture(width, height, PixelInternalFormat.Rgba32f);
textureOutput.MipCount = texture.MipCount;
texture.Bind();
textureOutput.Bind();
textureOutput.GenerateMipmaps();
textureOutput.Unbind();
Framebuffer frameBuffer = new Framebuffer(FramebufferTarget.Framebuffer, width, height);
frameBuffer.Bind();
GL.Disable(EnableCap.Blend);
shader.Enable();
shader.SetBoolToInt("is_array", texture is GLTextureCubeArray);
if (texture is GLTextureCubeArray)
{
GL.ActiveTexture(TextureUnit.Texture1);
texture.Bind();
shader.SetInt("dynamic_texture_array", 1);
}
else
{
GL.ActiveTexture(TextureUnit.Texture1);
texture.Bind();
shader.SetInt("dynamic_texture", 1);
}
for (int i = 0; i < textureOutput.MipCount; i++)
{
int mipWidth = (int)(width * Math.Pow(0.5, i));
int mipHeight = (int)(height * Math.Pow(0.5, i));
frameBuffer.Resize(mipWidth, mipHeight);
GL.FramebufferTexture(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0,
textureOutput.ID, i);
shader.SetInt("arrayLevel", arrayLevel);
shader.SetInt("mipLevel", mipLevel);
GL.ClearColor(0, 0, 0, 0);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.Viewport(0, 0, mipWidth, mipHeight);
//Draw the texture onto the framebuffer
ScreenQuadRender.Draw();
break;
}
//Disable shader and textures
GL.UseProgram(0);
GL.BindTexture(TextureTarget.Texture2D, 0);
if (cubemapCache.ContainsKey(texture.ID.ToString()))
{
cubemapCache[texture.ID.ToString()] = textureOutput;
}
else
{
cubemapCache.Add(texture.ID.ToString(), textureOutput);
}
return(textureOutput);
}
