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OpenGL & Vulkan

kd-11
Adept II

Bug in pixel transfer operations (OpenGL)

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I have encountered a rather interesting bug with pixel transfer operations. I have tested this on several AMD cards from the 7000 series to the RX 480 and 580.

The core of the problem is that when a texture is created with immutable storage, pixel transfer operations with endianness swap will always fail with GL_OUT_OF_MEMORY. A sample application is attached which attempts to isolate the problem. Compiled binary is provided for convenience as well as the source.

Notes:

- When the texture is created with mutable storage, readback works but when immutable is used it does not.

- Also note that while the trigger is a pack operation, setting the unpack state to swap bytes also will cause the GL_OUT_OF_MEMORY error. The error is not real, as can be demostrated with the attached sample and source code.

- The sample works fine on all other drivers I have tried.

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dorisyan
Staff
Staff

Re: Bug in pixel transfer operations (OpenGL)

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Hi kd-11‌, thanks for your report, this issue has been solved, the fix has been released in the current driver.Thanks for your report !

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3 Replies
xhuang
Staff
Staff

Re: Bug in pixel transfer operations (OpenGL)

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Hello, thanks for your report, we will investigate this.

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dorisyan
Staff
Staff

Re: Bug in pixel transfer operations (OpenGL)

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Hi kd-11‌, thanks for your report, this issue has been solved, the fix has been released in the current driver.Thanks for your report !

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kd-11
Adept II

Re: Bug in pixel transfer operations (OpenGL)

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Thanks.

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