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opengles emulator: replace the readback at end of frame with blit

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That replaces the readback to host we do at the end of each frame
with two blits on the GPU, one to copy the pixels into a texture
and another to render the texture to another in order to flip
the image.

Change-Id: I7e0e10493d38944d0b613e245023f34236d3dfc4
This commit is contained in:
Guy Zadickario
2011-08-16 10:52:19 +03:00
parent e16a448df0
commit 8c962dce6c
4 changed files with 145 additions and 2 deletions
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33
tools/emulator/opengl/host/libs/libOpenglRender/WindowSurface.cpp
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@@ -115,7 +115,8 @@ void WindowSurface::flushColorBuffer()
}
if (!copied) {
copyToColorBuffer();
//copyToColorBuffer();
blitToColorBuffer();
}
}
else {
@@ -257,6 +258,36 @@ void WindowSurface::copyToColorBuffer()
}
void WindowSurface::blitToColorBuffer()
{
if (!m_width && !m_height) return;
if (m_attachedColorBuffer->getWidth() != m_width ||
m_attachedColorBuffer->getHeight() != m_height) {
// XXX: should never happen - how this needs to be handled?
return;
}
//
// Make the surface current
//
EGLContext prevContext = s_egl.eglGetCurrentContext();
EGLSurface prevReadSurf = s_egl.eglGetCurrentSurface(EGL_READ);
EGLSurface prevDrawSurf = s_egl.eglGetCurrentSurface(EGL_DRAW);
FrameBuffer *fb = FrameBuffer::getFB();
if (!s_egl.eglMakeCurrent(fb->getDisplay(), m_eglSurface,
m_eglSurface, m_drawContext->getEGLContext())) {
return;
}
m_attachedColorBuffer->blitFromCurrentReadBuffer();
// restore current context/surface
s_egl.eglMakeCurrent(fb->getDisplay(), prevDrawSurf,
prevReadSurf, prevContext);
}
bool WindowSurface::resizePbuffer(unsigned int p_width, unsigned int p_height)
{
if (m_eglSurface &&