private void updateTargetTexture(int width, int height)
{
GLES20.GlActiveTexture(GLES20.GlTexture2);
_buffer = new byte[0];
if (funnyGhostEffectBuffer == null)
{
_buffer = new byte[4 * width * height];
for (var i = 0; i < (width * height * 4); i++)
{
_buffer [i] = (byte)((System.Math.Sin(i) * 127) + 127);
}
}
GLES20.GlBindTexture(GLES20.GlTexture2d, _otherTextureId);
GLES20.GlUniform1i(_otherTextureUniform, 2);
GLES20.GlTexParameterf(GLES20.GlTexture2d, GLES20.GlTextureMinFilter,
GLES20.GlNearest);
GLES20.GlTexParameterf(GLES20.GlTexture2d, GLES20.GlTextureMagFilter,
GLES20.GlLinear);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureWrapS,
GLES20.GlClampToEdge);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureWrapT,
GLES20.GlClampToEdge);
GLES10.GlTexImage2D(GLES20.GlTexture2d, 0, GLES20.GlRgba, width, height, 0, GLES20.GlRgba, GLES20.GlUnsignedByte, funnyGhostEffectBuffer ?? ByteBuffer.Wrap(_buffer));
if (funnyGhostEffectBuffer != null)
{
funnyGhostEffectBuffer.Clear();
funnyGhostEffectBuffer.Dispose();
}
}
public void OnDrawFrame(IGL10 gl)
{
GLES10.GlClear(GLES10.GlColorBufferBit | GLES10.GlDepthBufferBit | GLES10.GlStencilBufferBit);
// create the contexts if not done already
if (context == null)
{
var glInterface = GRGlInterface.CreateNativeGlInterface();
context = GRContext.Create(GRBackend.OpenGL, glInterface);
}
// manage the drawing surface
if (renderTarget == null || surface == null || renderTarget.Width != surfaceWidth || renderTarget.Height != surfaceHeight)
{
// create or update the dimensions
renderTarget?.Dispose();
var buffer = new int[3];
GLES20.GlGetIntegerv(GLES20.GlFramebufferBinding, buffer, 0);
GLES20.GlGetIntegerv(GLES20.GlStencilBits, buffer, 1);
GLES20.GlGetIntegerv(GLES20.GlSamples, buffer, 2);
var samples = buffer[2];
var maxSamples = context.GetMaxSurfaceSampleCount(colorType);
if (samples > maxSamples)
{
samples = maxSamples;
}
var glInfo = new GRGlFramebufferInfo((uint)buffer[0], colorType.ToGlSizedFormat());
renderTarget = new GRBackendRenderTarget(surfaceWidth, surfaceHeight, samples, buffer[1], glInfo);
// create the surface
surface?.Dispose();
surface = SKSurface.Create(context, renderTarget, surfaceOrigin, colorType);
}
using (new SKAutoCanvasRestore(surface.Canvas, true))
{
// start drawing
var e = new SKPaintGLSurfaceEventArgs(surface, renderTarget, surfaceOrigin, colorType);
OnPaintSurface(e);
#pragma warning disable CS0618 // Type or member is obsolete
OnDrawFrame(e.Surface, e.RenderTarget);
#pragma warning restore CS0618 // Type or member is obsolete
}
// flush the SkiaSharp contents to GL
surface.Canvas.Flush();
context.Flush();
}
public void OnDrawFrame(IGL10 gl)
{
GLES10.GlClear(GLES10.GlStencilBufferBit);
// create the surface
using (var surface = SKSurface.Create(context, renderTarget))
{
// draw using SkiaSharp
OnDrawFrame(surface, renderTarget);
surface.Canvas.Flush();
}
// flush the SkiaSharp contents to GL
context.Flush();
}
public void OnDrawFrame(IGL10 gl)
{
GLES10.GlClear(GLES10.GlColorBufferBit | GLES10.GlDepthBufferBit | GLES10.GlStencilBufferBit);
// create the contexts if not done already
if (context == null)
{
var glInterface = GRGlInterface.CreateNativeGlInterface();
context = GRContext.Create(GRBackend.OpenGL, glInterface);
}
// manage the drawing surface
if (renderTarget == null || surface == null || renderTarget.Width != surfaceWidth || renderTarget.Height != surfaceHeight)
{
// create or update the dimensions
renderTarget?.Dispose();
renderTarget = SKGLDrawable.CreateRenderTarget(surfaceWidth, surfaceHeight);
// create the surface
surface?.Dispose();
surface = SKSurface.Create(context, renderTarget, GRSurfaceOrigin.BottomLeft, SKColorType.Rgba8888);
}
using (new SKAutoCanvasRestore(surface.Canvas, true))
{
// start drawing
var e = new SKPaintGLSurfaceEventArgs(surface, renderTarget, GRSurfaceOrigin.BottomLeft, SKColorType.Rgba8888);
OnPaintSurface(e);
#pragma warning disable CS0618 // Type or member is obsolete
OnDrawFrame(e.Surface, e.RenderTarget);
#pragma warning restore CS0618 // Type or member is obsolete
}
// flush the SkiaSharp contents to GL
surface.Canvas.Flush();
context.Flush();
}