internal static Texture2D Create(int width, int height, int bytesPerPixel)
{
byte[] bytearray = new byte[width * height * bytesPerPixel];
// is there a faster way to create white?
for (int i = 0; i < bytearray.Length; i++)
{
bytearray[i] = 255;
}
GCHandle pinnedArray = GCHandle.Alloc(bytearray, GCHandleType.Pinned);
IntPtr pixels = pinnedArray.AddrOfPinnedObject();
var rv = new Texture2D();
{
GlBindings.GenTextures(1, out rv.m_TextureId);
GlBindings.BindTexture(TextureType.GL_TEXTURE_2D, rv.m_TextureId);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_WRAP_S, TextureAttributeValue.GL_REPEAT);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_WRAP_T, TextureAttributeValue.GL_REPEAT);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_MIN_FILTER, TextureAttributeValue.GL_LINEAR);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_MAG_FILTER, TextureAttributeValue.GL_LINEAR);
GlBindings.TexImage2D(TextureType.GL_TEXTURE_2D, 0, PixelInternalFormat.Rgba, width, height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, pixels);
}
pinnedArray.Free();
return(rv);
}
internal static Texture2D Create(IntPtr pixels, int width, int height, int bytesPerPixel)
{
var rv = new Texture2D();
GlBindings.GenTextures(1, out rv.m_TextureId);
GlBindings.BindTexture(TextureType.GL_TEXTURE_2D, rv.m_TextureId);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_WRAP_S, TextureAttributeValue.GL_REPEAT);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_WRAP_T, TextureAttributeValue.GL_REPEAT);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_MIN_FILTER, TextureAttributeValue.GL_LINEAR);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_MAG_FILTER, TextureAttributeValue.GL_LINEAR);
GlBindings.TexImage2D(TextureType.GL_TEXTURE_2D, 0, PixelInternalFormat.Rgba, width, height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, pixels);
return(rv);
}
internal static Texture2D CreateFromFile(string filename, bool generateMipmaps = false)
{
using (TracedStopwatch.Start("Loading Texture: " + filename))
{
IntPtr intPtr = SDL2.SDL_image.IMG_Load(filename);
var surface = Marshal.PtrToStructure <SDL.SDL_Surface>(intPtr);
var pixelFormat = Marshal.PtrToStructure <SDL.SDL_PixelFormat>(surface.format);
var mode = OpenGL.PixelFormat.Rgba;
if (pixelFormat.BytesPerPixel == 3)
{
mode = OpenGL.PixelFormat.Rgb;
}
if (pixelFormat.BytesPerPixel == 1)
{
mode = OpenGL.PixelFormat.Red;
}
var rv = new Texture2D();
// TODO Pass in wraping styles
GlBindings.GenTextures(1, out rv.m_TextureId);
GlBindings.BindTexture(TextureType.GL_TEXTURE_2D, rv.m_TextureId);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_WRAP_S, TextureAttributeValue.GL_REPEAT);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_WRAP_T, TextureAttributeValue.GL_REPEAT);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_MIN_FILTER, TextureAttributeValue.GL_LINEAR);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_MAG_FILTER, TextureAttributeValue.GL_LINEAR);
var internalFormat = OpenGL.PixelInternalFormat.Rgba;
if (mode == PixelFormat.Luminance)
{
internalFormat = PixelInternalFormat.Red;
}
GlBindings.TexImage2D(TextureType.GL_TEXTURE_2D, 0, internalFormat, surface.w, surface.h, 0, mode, PixelType.UnsignedByte, surface.pixels);
if (generateMipmaps)
{
GlBindings.GenerateMipmap(TextureType.GL_TEXTURE_2D);
}
SDL2.SDL.SDL_free(intPtr);
return(rv);
}
}
// TODO Will probably need to handle resizing the framebuffer
// TODO Make internal and store
public static RenderTarget Create(int width, int height)
{
var rv = new RenderTarget();
// Create the frame buffer
GlBindings.GenFramebuffers(1, out rv.m_RanderTargetId);
GlBindings.BindFrameBuffer(OpenGL.FrameBuffer.GL_FRAMEBUFFER, rv.m_RanderTargetId);
// Attach the texture component
GlBindings.GenTextures(1, out rv.m_TextureColorBuffer);
GlBindings.BindTexture(TextureType.GL_TEXTURE_2D, rv.m_TextureColorBuffer);
GlBindings.TexImage2D(TextureType.GL_TEXTURE_2D, 0, OpenGL.PixelInternalFormat.Rgb, width, height, 0, OpenGL.PixelFormat.Rgb, OpenGL.PixelType.UnsignedByte, IntPtr.Zero);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_MIN_FILTER, TextureAttributeValue.GL_LINEAR);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_MAG_FILTER, TextureAttributeValue.GL_LINEAR);
GlBindings.glFramebufferTexture2D(FrameBuffer.GL_FRAMEBUFFER, Attachment.GL_COLOR_ATTACHMENT0, TextureType.GL_TEXTURE_2D, rv.m_TextureColorBuffer, 0);
// TODO Depth buffer!
GlBindings.glGenRenderbuffers(1, out rv.m_RenderBufferObjectId);
GlBindings.glBindRenderbuffer(RenderBuffer.GL_RENDERBUFFER, rv.m_RenderBufferObjectId);
GlBindings.glRenderbufferStorage(RenderBuffer.GL_RENDERBUFFER, InternalFormat.GL_DEPTH24_STENCIL8, width, height);
GlBindings.glFramebufferRenderbuffer(RenderBuffer.GL_FRAMEBUFFER, Attachment.GL_DEPTH_STENCIL_ATTACHMENT, RenderBuffer.GL_RENDERBUFFER, rv.RenderBufferObjectId);
if (GlBindings.glCheckFramebufferStatus(FrameBuffer.GL_FRAMEBUFFER) != (int)ReturnValue.GL_FRAMEBUFFER_COMPLETE)
{
throw new Exception("Error with framebuffer");
}
// Store previous
GlBindings.BindFrameBuffer(OpenGL.FrameBuffer.GL_FRAMEBUFFER, 0);
return(rv);
}
public void SetTextureSamplingAttribute(TextureAttributeValue attribute)
{
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_MIN_FILTER, attribute);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_2D, TextureAttribute.GL_TEXTURE_MAG_FILTER, attribute);
}
internal static TextureCubeMap CreateFromFile(string front, string back, string bottom, string top, string left, string right, bool generateMipmaps = false)
{
using (TracedStopwatch.Start("Loading Cubemap: " + front))
{
var rv = new TextureCubeMap();
// Generate the cube map
GlBindings.GenTextures(1, out rv.m_TextureId);
GlBindings.BindTexture(TextureType.GL_TEXTURE_CUBE_MAP, rv.m_TextureId);
var items = new List <string>
{
right,
left,
top,
bottom,
front,
back
};
var i = 0;
foreach (var item in items)
{
var fi = new FileInfo(item);
if (!fi.Exists)
{
throw new Exception("File not found");
}
// Load each image from disk
IntPtr intPtr = SDL2.SDL_image.IMG_Load(item);
var surface = Marshal.PtrToStructure <SDL.SDL_Surface>(intPtr);
var pixelFormat = Marshal.PtrToStructure <SDL.SDL_PixelFormat>(surface.format);
var mode = OpenGL.PixelFormat.Rgba;
if (pixelFormat.BytesPerPixel == 3)
{
mode = OpenGL.PixelFormat.Rgb;
}
if (pixelFormat.BytesPerPixel == 1)
{
mode = OpenGL.PixelFormat.Red;
}
var internalFormat = OpenGL.PixelInternalFormat.Rgba;
if (mode == PixelFormat.Luminance)
{
internalFormat = PixelInternalFormat.Red;
}
GlBindings.TexImage2D(TextureType.GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, internalFormat, surface.w, surface.h, 0, mode, PixelType.UnsignedByte, surface.pixels);
// Free the managed resource
SDL2.SDL.SDL_free(intPtr);
i++;
}
// Texture Sampling and Filtering
GlBindings.TexParameteri(TextureType.GL_TEXTURE_CUBE_MAP, TextureAttribute.GL_TEXTURE_WRAP_S, TextureAttributeValue.GL_CLAMP_TO_EDGE);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_CUBE_MAP, TextureAttribute.GL_TEXTURE_WRAP_T, TextureAttributeValue.GL_CLAMP_TO_EDGE);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_CUBE_MAP, TextureAttribute.GL_TEXTURE_WRAP_R, TextureAttributeValue.GL_CLAMP_TO_EDGE);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_CUBE_MAP, TextureAttribute.GL_TEXTURE_MIN_FILTER, TextureAttributeValue.GL_LINEAR);
GlBindings.TexParameteri(TextureType.GL_TEXTURE_CUBE_MAP, TextureAttribute.GL_TEXTURE_MAG_FILTER, TextureAttributeValue.GL_LINEAR);
return(rv);
}
}