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55 lines
2.1 KiB
55 lines
2.1 KiB
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drawElements Quality Program Test Specification
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-----------------------------------------------
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Copyright 2014 The Android Open Source Project
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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gl_FragDepth tests
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Tests:
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+ dEQP-GLES3.functional.shaders.fragdepth.*
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Includes:
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+ gl_FragDepth usage in following scenarios:
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- Unconditional write
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- Conditional write
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- Write in loop
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- Write in user-defined function
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- Discard before and after write
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+ Depth comparison with gl_FragDepth write
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+ gl_FragDepth use when rendering triangles
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Excludes:
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+ Depth value conversion accuracy tests
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+ gl_FragDepth use when rendering points and lines
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Description:
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For comparison cases depth buffer is first initialized by rendering
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two adjecent quads. Left one will fill depth buffer with constant value,
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while right quad fills with value that is interpolated in range 0..1.
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Color buffer is filled with blue color.
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Single quad with a selected shader and depth comparison mode is rendered.
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Where depth test passes, green value will be written to color buffer.
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For depth write-only cases the selected shader is used to initialize
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the depth buffer by rendering a simple quad. After that depth buffer
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is visualized by rendering multiple viewport-sized quads with a different
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colors and depth values in such manner that each depth range slice
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will end up showing in color buffer with a distinct color.
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In both test types rendered image is compared against a reference image
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produced by a reference renderer.
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