e07be58dc4
Whilst GLSL requires highp for the vertex shader stage, highp is optional for the fragment shader. Make sure that we work in highp by default during the vertex shader stage, using either highp or mediump for the texcoord varying according to what the fragment shader supports. Signed-off-by: Daniel Stone <daniels@collabora.com>
49 lines
1.6 KiB
GLSL
49 lines
1.6 KiB
GLSL
/*
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* Copyright 2012 Intel Corporation
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* Copyright 2015,2019 Collabora, Ltd.
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* Copyright 2016 NVIDIA Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/* Always use high-precision for vertex calculations */
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precision highp float;
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#ifdef GL_FRAGMENT_PRECISION_HIGH
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#define FRAG_PRECISION highp
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#else
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#define FRAG_PRECISION mediump
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#endif
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uniform mat4 proj;
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attribute vec2 position;
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attribute vec2 texcoord;
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/* Match the varying precision to the fragment shader */
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varying FRAG_PRECISION vec2 v_texcoord;
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void main()
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{
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gl_Position = proj * vec4(position, 0.0, 1.0);
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v_texcoord = texcoord;
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}
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