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Bug 556572: Support none-multiple of 4 strides. r=joedrew

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This commit is contained in:
Bas Schouten 2010-04-01 23:17:13 +02:00
parent 339d76e2c9
commit 8ebb80cb11
1 changed files with 30 additions and 3 deletions
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33
gfx/layers/opengl/ImageLayerOGL.cpp
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@ -214,7 +214,20 @@ PlanarYCbCrImageOGL::AllocateTextures()
mManager->MakeCurrent();
sglWrapper.GenTextures(3, mTextures);
sglWrapper.PixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, mData.mYStride);
GLint alignment;
if (!((ptrdiff_t)mData.mYStride & 0x7) && !((ptrdiff_t)mData.mYChannel & 0x7)) {
alignment = 8;
} else if (!((ptrdiff_t)mData.mYStride & 0x3)) {
alignment = 4;
} else if (!((ptrdiff_t)mData.mYStride & 0x1)) {
alignment = 2;
} else {
alignment = 1;
}
// Set texture alignment for Y plane.
sglWrapper.PixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, alignment);
sglWrapper.BindTexture(LOCAL_GL_TEXTURE_2D, mTextures[0]);
@ -232,8 +245,21 @@ PlanarYCbCrImageOGL::AllocateTextures()
LOCAL_GL_LUMINANCE,
LOCAL_GL_UNSIGNED_BYTE,
mData.mYChannel);
if (!((ptrdiff_t)mData.mCbCrStride & 0x7) &&
!((ptrdiff_t)mData.mCbChannel & 0x7) &&
!((ptrdiff_t)mData.mCrChannel & 0x7)) {
alignment = 8;
} else if (!((ptrdiff_t)mData.mCbCrStride & 0x3)) {
alignment = 4;
} else if (!((ptrdiff_t)mData.mCbCrStride & 0x1)) {
alignment = 2;
} else {
alignment = 1;
}
sglWrapper.PixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, mData.mCbCrStride);
// Set texture alignment for Cb/Cr plane
sglWrapper.PixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, alignment);
sglWrapper.BindTexture(LOCAL_GL_TEXTURE_2D, mTextures[1]);
@ -269,7 +295,8 @@ PlanarYCbCrImageOGL::AllocateTextures()
LOCAL_GL_UNSIGNED_BYTE,
mData.mCrChannel);
sglWrapper.PixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, 0);
// Reset alignment to default
sglWrapper.PixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 4);
}
void