public byte[] GetData()
{
VerifyThreadAffinity();
var data = new byte[4 * Size.Width * Size.Height];
// GLES doesn't support glGetTexImage so data must be read back via a frame buffer
if (OpenGL.Features.HasFlag(OpenGL.GLFeatures.GLES))
{
// Query the active framebuffer so we can restore it afterwards
int lastFramebuffer;
OpenGL.glGetIntegerv(OpenGL.GL_FRAMEBUFFER_BINDING, out lastFramebuffer);
uint framebuffer;
OpenGL.glGenFramebuffers(1, out framebuffer);
OpenGL.glBindFramebuffer(OpenGL.GL_FRAMEBUFFER, framebuffer);
OpenGL.CheckGLError();
OpenGL.glFramebufferTexture2D(OpenGL.GL_FRAMEBUFFER, OpenGL.GL_COLOR_ATTACHMENT0, OpenGL.GL_TEXTURE_2D, texture, 0);
OpenGL.CheckGLError();
unsafe
{
fixed(byte *ptr = &data[0])
{
var intPtr = new IntPtr((void *)ptr);
OpenGL.glReadPixels(0, 0, Size.Width, Size.Height, OpenGL.GL_BGRA, OpenGL.GL_UNSIGNED_BYTE, intPtr);
OpenGL.CheckGLError();
}
}
OpenGL.glBindFramebuffer(OpenGL.GL_FRAMEBUFFER, (uint)lastFramebuffer);
OpenGL.glDeleteFramebuffers(1, ref framebuffer);
OpenGL.CheckGLError();
}
else
{
OpenGL.glBindTexture(OpenGL.GL_TEXTURE_2D, texture);
unsafe
{
fixed(byte *ptr = &data[0])
{
var intPtr = new IntPtr((void *)ptr);
OpenGL.glGetTexImage(OpenGL.GL_TEXTURE_2D, 0, OpenGL.GL_BGRA,
OpenGL.GL_UNSIGNED_BYTE, intPtr);
}
}
OpenGL.CheckGLError();
}
return(data);
}
public void Dispose()
{
if (disposed)
{
return;
}
disposed = true;
texture.Dispose();
OpenGL.glDeleteFramebuffers(1, ref framebuffer);
OpenGL.CheckGLError();
OpenGL.glDeleteRenderbuffers(1, ref depth);
OpenGL.CheckGLError();
}
void Dispose(bool disposing)
{
if (disposed)
{
return;
}
disposed = true;
if (disposing)
{
foreach (Texture t in texture)
{
t.Dispose();
}
}
OpenGL.glDeleteFramebuffers(1, ref framebuffer);
OpenGL.CheckGLError();
OpenGL.glDeleteRenderbuffers(1, ref depth);
OpenGL.CheckGLError();
}
public byte[] GetData()
{
VerifyThreadAffinity();
var data = new byte[4 * Size.Width * Size.Height];
// GLES doesn't support glGetTexImage so data must be read back via a frame buffer
if (OpenGL.Profile == GLProfile.Embedded)
{
// Query the active framebuffer so we can restore it afterwards
int lastFramebuffer;
OpenGL.glGetIntegerv(OpenGL.GL_FRAMEBUFFER_BINDING, out lastFramebuffer);
uint framebuffer;
OpenGL.glGenFramebuffers(1, out framebuffer);
OpenGL.glBindFramebuffer(OpenGL.GL_FRAMEBUFFER, framebuffer);
OpenGL.CheckGLError();
OpenGL.glFramebufferTexture2D(OpenGL.GL_FRAMEBUFFER, OpenGL.GL_COLOR_ATTACHMENT0, OpenGL.GL_TEXTURE_2D, texture, 0);
OpenGL.CheckGLError();
var canReadBGRA = OpenGL.Features.HasFlag(OpenGL.GLFeatures.ESReadFormatBGRA);
unsafe
{
fixed(byte *ptr = &data[0])
{
var intPtr = new IntPtr(ptr);
var format = canReadBGRA ? OpenGL.GL_BGRA : OpenGL.GL_RGBA;
OpenGL.glReadPixels(0, 0, Size.Width, Size.Height, format, OpenGL.GL_UNSIGNED_BYTE, intPtr);
OpenGL.CheckGLError();
}
}
// Convert RGBA to BGRA
if (!canReadBGRA)
{
for (var i = 0; i < 4 * Size.Width * Size.Height; i += 4)
{
var temp = data[i];
data[i] = data[i + 2];
data[i + 2] = temp;
}
}
OpenGL.glBindFramebuffer(OpenGL.GL_FRAMEBUFFER, (uint)lastFramebuffer);
OpenGL.glDeleteFramebuffers(1, ref framebuffer);
OpenGL.CheckGLError();
}
else
{
OpenGL.glBindTexture(OpenGL.GL_TEXTURE_2D, texture);
unsafe
{
fixed(byte *ptr = &data[0])
{
var intPtr = new IntPtr((void *)ptr);
OpenGL.glGetTexImage(OpenGL.GL_TEXTURE_2D, 0, OpenGL.GL_BGRA,
OpenGL.GL_UNSIGNED_BYTE, intPtr);
}
}
OpenGL.CheckGLError();
}
return(data);
}
