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Commit c55d2b41 by James Darpinian Committed by Commit Bot
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Respect IOSurface stride

In the iOS simulator we use glReadPixels to transfer rendered pixels to the IOSurface. We need to account for the possibility of the row stride not being equal to the width, because that happens sometimes. It's currently causing corrupt rendering in Google Maps on WebKit. Bug: angleproject:4611 Change-Id: I553d65cb0d0bf922e855ea50089904807dd39118 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2181676Reviewed-by: 's avatarKenneth Russell <kbr@chromium.org> Reviewed-by: 's avatarJonah Ryan-Davis <jonahr@google.com> Commit-Queue: James Darpinian <jdarpinian@chromium.org>
parent 8270ebbd
Showing with 11 additions and 0 deletions
src/libANGLE/renderer/gl/eagl/IOSurfaceSurfaceEAGL.h
......@@ -75,6 +75,7 @@ class IOSurfaceSurfaceEAGL : public SurfaceGL
int mHeight;
int mPlane;
int mFormatIndex;
int mRowStrideInPixels;
bool mAlphaInitialized;
#if defined(ANGLE_PLATFORM_IOS_SIMULATOR)
......
src/libANGLE/renderer/gl/eagl/IOSurfaceSurfaceEAGL.mm
......@@ -83,6 +83,7 @@ IOSurfaceSurfaceEAGL::IOSurfaceSurfaceEAGL(const egl::SurfaceState &state,
mWidth(0),
mHeight(0),
mPlane(0),
mRowStrideInPixels(0),
mFormatIndex(-1),
mAlphaInitialized(false)
{
......@@ -94,6 +95,14 @@ IOSurfaceSurfaceEAGL::IOSurfaceSurfaceEAGL(const egl::SurfaceState &state,
mWidth = static_cast<int>(attribs.get(EGL_WIDTH));
mHeight = static_cast<int>(attribs.get(EGL_HEIGHT));
mPlane = static_cast<int>(attribs.get(EGL_IOSURFACE_PLANE_ANGLE));
// Hopefully the number of bytes per row is always an integer number of pixels. We use
// glReadPixels to fill the IOSurface in the simulator and it can only support strides that are
// an integer number of pixels.
ASSERT(IOSurfaceGetBytesPerRowOfPlane(mIOSurface, mPlane) %
IOSurfaceGetBytesPerElementOfPlane(mIOSurface, mPlane) ==
0);
mRowStrideInPixels = static_cast<int>(IOSurfaceGetBytesPerRowOfPlane(mIOSurface, mPlane) /
IOSurfaceGetBytesPerElementOfPlane(mIOSurface, mPlane));
EGLAttrib internalFormat = attribs.get(EGL_TEXTURE_INTERNAL_FORMAT_ANGLE);
EGLAttrib type = attribs.get(EGL_TEXTURE_TYPE_ANGLE);
......@@ -227,6 +236,7 @@ egl::Error IOSurfaceSurfaceEAGL::releaseTexImage(const gl::Context *context, EGL
functions->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
mBoundTextureID, 0);
gl::PixelPackState state;
state.rowLength = mRowStrideInPixels;
state.alignment = 1;
stateManager->setPixelPackState(state);
// TODO(kbr): possibly more state to be set here, including setting any
......
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