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#pragma warning disable CS0618 // Type or member is obsolete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#pragma warning restore CS0618 // Type or member is obsolete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 OnSurfaceCreated(IGL10 gl, EGLConfig config)
{
// GL configurations
int bonenum = 48;
GLES20.GlGetIntegerv(GLES20.GlMaxTextureSize, mTexSize, 0);
ShellViewModel.MaxBone = bonenum;
mNpot = hasExt("GL_OES_texture_npot");
// initialize
GLES20.GlClearColor(0, 0, 0, 1);
GLES20.GlEnable(GLES20.GlDepthTest);
GLES20.GlEnable(GLES20.GlBlend);
checkGlError("GlEnable");
// GLUtils.texImage2D generates premultiplied-alpha texture. so we use GL_ONE instead of GL_ALPHA
GLES20.GlBlendFunc(GL10.GlOne, GL10.GlOneMinusSrcAlpha);
GLES20.GlDepthFunc(GLES20.GlLequal);
GLES20.GlFrontFace(GLES20.GlCw);
checkGlError("GlMiscSettings");
// shader programs
mGLSL = new Dictionary <String, GLSL>();
mGLSL.Add("builtin:default",
new GLSL(String.Format(Util.ReadAssetString("shader/vs.vsh"), ShellViewModel.MaxBone),
Util.ReadAssetString("shader/fs.fsh")));
mGLSL.Add("builtin:default_alpha",
new GLSL(String.Format(Util.ReadAssetString("shader/vs.vsh"), ShellViewModel.MaxBone),
Util.ReadAssetString("shader/fs_alpha.fsh")));
mGLSL.Add("builtin:nomotion",
new GLSL(Util.ReadAssetString("shader/vs_nm.vsh"), Util.ReadAssetString("shader/fs.fsh")));
mGLSL.Add("builtin:nomotion_alpha",
new GLSL(Util.ReadAssetString("shader/vs_nm.vsh"), Util.ReadAssetString("shader/fs_alpha.fsh")));
// render targets
mRT = new Dictionary <String, RenderTarget>();
mRT.Add("screen", new RenderTarget());
GLES20.GlBindFramebuffer(GLES20.GlFramebuffer, 0);
}
public void afterDrawFrame()
{
GLES20.GlBindFramebuffer(36160, mOriginalFramebufferId /*.array()[0]*/.Get(0));
GLES20.GlViewport(0, 0, mHmd.getScreen().getWidth(), mHmd.getScreen().getHeight());
GLES20.GlGetIntegerv(2978, mViewport);
GLES20.GlGetIntegerv(2884, mCullFaceEnabled);
GLES20.GlGetIntegerv(3089, mScissorTestEnabled);
GLES20.GlDisable(3089);
GLES20.GlDisable(2884);
GLES20.GlClearColor(0.0F, 0.0F, 0.0F, 1.0F);
GLES20.GlClear(16640);
GLES20.GlUseProgram(mProgramHolder.program);
GLES20.GlEnable(3089);
GLES20.GlScissor(0, 0, mHmd.getScreen().getWidth() / 2, mHmd.getScreen().getHeight());
renderDistortionMesh(mLeftEyeDistortionMesh);
GLES20.GlScissor(mHmd.getScreen().getWidth() / 2, 0, mHmd.getScreen().getWidth() / 2, mHmd.getScreen().getHeight());
renderDistortionMesh(mRightEyeDistortionMesh);
GLES20.GlDisableVertexAttribArray(mProgramHolder.aPosition);
GLES20.GlDisableVertexAttribArray(mProgramHolder.aVignette);
GLES20.GlDisableVertexAttribArray(mProgramHolder.aTextureCoord);
GLES20.GlUseProgram(0);
GLES20.GlBindBuffer(34962, 0);
GLES20.GlBindBuffer(34963, 0);
GLES20.GlDisable(3089);
if (mCullFaceEnabled /*.array()[0]*/.Get(0) == 1)
{
GLES20.GlEnable(2884);
}
if (mScissorTestEnabled /*.array()[0]*/.Get(0) == 1)
{
GLES20.GlEnable(3089);
}
GLES20.GlViewport(mViewport /*.array()[0]*/.Get(0), mViewport /*.array()[1]*/.Get(1), mViewport /*.array()[2]*/.Get(2), mViewport /*.array()[3]*/.Get(3));
}
public void beforeDrawFrame()
{
GLES20.GlGetIntegerv(36006, mOriginalFramebufferId);
GLES20.GlBindFramebuffer(36160, mFramebufferId);
}