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b=525538; webgl readPixels fix; r=vlad

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This commit is contained in:
Benoit Jacob 2010-05-26 16:53:15 -07:00
parent 5a542da3e9
commit cc2978a0dd
1 changed files with 12 additions and 1 deletions
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13
content/canvas/src/WebGLContextGL.cpp
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@ -2034,7 +2034,18 @@ WebGLContext::ReadPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum
MakeContextCurrent();
PRUint32 len = width * height * size;
PRUint32 packAlignment;
gl->fGetIntegerv(LOCAL_GL_PACK_ALIGNMENT, (GLint*) &packAlignment);
PRUint32 plainRowSize = width*size;
// alignedRowSize = row size rounded up to next multiple of
// packAlignment which is a power of 2
PRUint32 alignedRowSize = (plainRowSize + packAlignment-1) &
~PRUint32(packAlignment-1);
PRUint32 len = (height-1)*alignedRowSize + plainRowSize;
JSObject *abufObject = js_CreateArrayBuffer(js.ctx, len);
if (!abufObject)
return SynthesizeGLError(LOCAL_GL_OUT_OF_MEMORY, "readPixels: could not allocate buffer");