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# Resource Limits
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OpenGL ES 2.0 API is quite powerful but there are still some features that are
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optional or allow for wide variability between implementations.
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Applications that need more than the minimum values for these limits should
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query the capabilities of the GL device and scale their usage based on the
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device’s feature set. Failing to do so and assuming sufficient limits typically
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results in reduced portability.
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The various implementation dependent limits can be found in Tables 6.18 – 6.20
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of the [OpenGL ES 2.0.25 specification]
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(http://www.khronos.org/registry/gles/specs/2.0/es_full_spec_2.0.25.pdf).
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# Capabilities
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Capability | ES 2.0 Minimum | ANGLE | SM2 | SM3 | SM4+
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:----------------------------------------- | :------------- | :--------------- | :---- | :------- | :-------
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GL\_MAX\_VERTEX\_ATTRIBS | 8 | 16 | | |
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GL\_MAX\_VERTEX\_UNIFORM\_VECTORS | 128 | 254 | | |
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GL\_MAX\_VERTEX\_TEXTURE\_IMAGE\_UNITS | 0 | (fn1) | 0 | 0 | 4
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GL\_MAX\_VARYING\_VECTORS | 8 | (fn1) | 8 | 10 | 10
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GL\_MAX\_FRAGMENT\_UNIFORM\_VECTORS | 16 | (fn1) | 29 | 221 | 221
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GL\_MAX\_TEXTURE\_IMAGE\_UNITS | 8 | 16 | | |
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GL\_MAX\_TEXTURE\_SIZE | 64 | 2048-16384 (fn1) | | |
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GL\_MAX\_CUBE\_MAP\_SIZE | 16 | 2048-16384 (fn1) | | |
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GL\_MAX\_RENDERBUFFER\_SIZE | 1 | 2048-16384 (fn1) | | |
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GL\_ALIASED\_POINT\_SIZE\_RANGE (min, max) | (1, 1) | (fn2) | (1,1) | (1, fn2) | (1, fn2)
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GL\_ALIASED\_LINE\_WIDTH\_RANGE (min, max) | (1, 1) | (1, 1) | | |
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## Notes
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* fn1: limits vary based on the underlying hardware capabilities
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* fn2: on SM3 or better hardware the max point size is D3DCAPS9.MaxPointSize
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