private void DrawGpuTextureWithDesc(Action <SKSurface, GRGlBackendTextureDesc> draw)
{
using (var ctx = CreateGlContext())
{
ctx.MakeCurrent();
// create the texture
var textureInfo = ctx.CreateTexture(new SKSizeI(100, 100));
// this is a new field that was added to the struct
textureInfo.Format = 0;
var textureDesc = new GRGlBackendTextureDesc
{
Width = 100,
Height = 100,
Config = GRPixelConfig.Rgba8888,
Flags = GRBackendTextureDescFlags.RenderTarget,
Origin = GRSurfaceOrigin.BottomLeft,
SampleCount = 0,
TextureHandle = textureInfo,
};
// create the surface
using (var grContext = GRContext.Create(GRBackend.OpenGL))
using (var surface = SKSurface.CreateAsRenderTarget(grContext, textureDesc))
{
Assert.NotNull(surface);
draw(surface, textureDesc);
}
// clean up
ctx.DestroyTexture(textureInfo.Id);
}
}
private void DrawGpuTextureWithOldDesc(Action <SKSurface, GRBackendTextureDesc> draw)
{
using (var ctx = CreateGlContext())
{
ctx.MakeCurrent();
// create the texture
var textureInfo = ctx.CreateTexture(new SKSizeI(100, 100));
var oldInfo = new GRTextureInfoOld
{
Id = textureInfo.Id,
Target = textureInfo.Target
};
var textureHandle = GCHandle.Alloc(oldInfo, GCHandleType.Pinned);
var textureDesc = new GRBackendTextureDesc
{
Width = 100,
Height = 100,
Config = GRPixelConfig.Rgba8888,
Flags = GRBackendTextureDescFlags.RenderTarget,
Origin = GRSurfaceOrigin.BottomLeft,
SampleCount = 0,
TextureHandle = textureHandle.AddrOfPinnedObject(),
};
// create the surface
using (var grContext = GRContext.Create(GRBackend.OpenGL))
using (var surface = SKSurface.CreateAsRenderTarget(grContext, textureDesc))
{
Assert.NotNull(surface);
draw(surface, textureDesc);
}
// clean up
textureHandle.Free();
ctx.DestroyTexture(textureInfo.Id);
}
}
internal static RasterCacheResult Rasterize(GRContext context, SKMatrix ctm, SKColorSpace dst_color_space, bool checkerboard, SKRect logical_rect, Action <SKCanvas> draw_function)
{
SKRectI cache_rect = RasterCache.GetDeviceBounds(logical_rect, ctm);
SKImageInfo image_info = new SKImageInfo(cache_rect.Width, cache_rect.Height);
SKSurface surface = context != null?SKSurface.CreateAsRenderTarget(context, new GRGlBackendTextureDesc()
{
Width = cache_rect.Width, Height = cache_rect.Height
}) : SKSurface.Create(image_info); //{ image_info.
if (surface == null)
{
return(new RasterCacheResult());
}
SKCanvas canvas = surface.Canvas;
SKCanvas xformCanvas = canvas;
//if (dst_color_space != null)
//{
// xformCanvas = SkCreateColorSpaceXformCanvas(canvas, GlobalMembers.sk_ref_sp(dst_color_space));
// if (xformCanvas != null)
// {
// canvas = xformCanvas;
// }
//}
canvas.Clear(GlobalMembers.SK_ColorTRANSPARENT);
canvas.Translate(-cache_rect.Left, -cache_rect.Top);
canvas.Concat(ref ctm);
draw_function(canvas);
//if (checkerboard)
//{
// DrawCheckerboard(canvas, logical_rect);
//}
return(new RasterCacheResult(surface.Snapshot(), logical_rect));
}
private void DrawGpuTexture(Action <SKSurface, GRBackendTexture> draw)
{
using (var ctx = CreateGlContext())
{
ctx.MakeCurrent();
// create the texture
var textureInfo = ctx.CreateTexture(new SKSizeI(100, 100));
var texture = new GRBackendTexture(100, 100, false, textureInfo);
// create the surface
using (var grContext = GRContext.Create(GRBackend.OpenGL))
using (var surface = SKSurface.CreateAsRenderTarget(grContext, texture, SKColorType.Rgba8888))
{
Assert.NotNull(surface);
draw(surface, texture);
}
// clean up
ctx.DestroyTexture(textureInfo.Id);
}
}
private void PrepareSkia()
{
// CONTEXT
// create the SkiaSharp context
var glInterface = GRGlInterface.CreateNativeGlInterface();
context = GRContext.Create(GRBackend.OpenGL, glInterface);
// TEXTURE
// the texture size
var textureSize = new SKSizeI(256, 256);
// create the OpenGL texture
textureId = GL.GenTexture();
GL.BindTexture(TextureTarget.Texture2D, textureId);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, textureSize.Width, textureSize.Height, 0, OpenTK.Graphics.OpenGL.PixelFormat.Rgba, PixelType.UnsignedByte, IntPtr.Zero);
GL.BindTexture(TextureTarget.Texture2D, 0);
// create the SkiaSharp texture description
var textureInfo = new GRGlTextureInfo
{
Id = (uint)textureId,
Target = (uint)TextureTarget.Texture2D
};
var textureHandle = GCHandle.Alloc(textureInfo, GCHandleType.Pinned);
textureDesc = new GRBackendTextureDesc
{
Width = textureSize.Width,
Height = textureSize.Height,
Config = GRPixelConfig.Rgba8888,
Flags = GRBackendTextureDescFlags.RenderTarget,
Origin = GRSurfaceOrigin.TopLeft,
SampleCount = 0,
TextureHandle = textureHandle.AddrOfPinnedObject(),
};
// create the SkiaSharp texture surface
textureSurface = SKSurface.CreateAsRenderTarget(context, textureDesc);
// free the pinned GC handle when we are done
textureHandle.Free();
// initialize the texture content
UpdateTexture(false);
// RENDER TARGET
// create the SkiaSharp render target description
renderDesc = new GRBackendRenderTargetDesc
{
RenderTargetHandle = (IntPtr)0,
Width = Width,
Height = Height,
Config = GRPixelConfig.Rgba8888,
Origin = GRSurfaceOrigin.TopLeft,
SampleCount = 0,
StencilBits = 0,
};
// create the SkiaSharp render target surface
renderSurface = SKSurface.Create(context, renderDesc);
}
