100 lines
3.3 KiB
Plaintext
100 lines
3.3 KiB
Plaintext
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// <copyright file="VideoUnlitShader.cs" company="Google Inc.">
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// Copyright (C) 2017 Google Inc. All Rights Reserved.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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// </copyright>
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//
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// This shader renders from OES_external_image textures which require special
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// OpenGLES extensions and a special texture sampler.
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//
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Shader "GoogleVR/Video Unlit Shader" {
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Properties {
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_Gamma ("Video gamma", Range(0.01,3.0)) = 1.0
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_MainTex ("Base (RGB)", 2D) = "white" {}
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[KeywordEnum(None, TopBottom, LeftRight)] _StereoMode ("Stereo mode", Float) = 0
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[Toggle(FLIP_X)] _FlipX ("Flip X", Float) = 0
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}
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SubShader {
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Pass {
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Tags { "RenderType" = "Opaque" }
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Lighting Off
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Cull Off
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GLSLPROGRAM
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#pragma only_renderers gles gles3
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#extension GL_OES_EGL_image_external : require
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#extension GL_OES_EGL_image_external_essl3 : enable
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#pragma multi_compile ___ _STEREOMODE_TOPBOTTOM _STEREOMODE_LEFTRIGHT
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#pragma multi_compile ___ FLIP_X
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precision mediump int;
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precision mediump float;
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#ifdef VERTEX
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uniform mat4 video_matrix;
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uniform int unity_StereoEyeIndex;
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varying vec2 uv;
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void main() {
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gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
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vec4 untransformedUV = gl_MultiTexCoord0;
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#ifdef FLIP_X
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untransformedUV.x = 1.0 - untransformedUV.x;
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#endif // FLIP_X
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#ifdef _STEREOMODE_TOPBOTTOM
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untransformedUV.y *= 0.5;
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if (unity_StereoEyeIndex == 0) {
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untransformedUV.y += 0.5;
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}
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#endif // _STEREOMODE_TOPBOTTOM
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#ifdef _STEREOMODE_LEFTRIGHT
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untransformedUV.x *= 0.5;
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if (unity_StereoEyeIndex != 0) {
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untransformedUV.x += 0.5;
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}
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#endif // _STEREOMODE_LEFTRIGHT
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uv = (video_matrix * untransformedUV).xy;
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}
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#endif // VERTEX
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#ifdef FRAGMENT
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vec3 gammaCorrect(vec3 v, float gamma) {
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return pow(v, vec3(1.0/gamma));
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}
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// Apply the gamma correction. One possible optimization that could
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// be applied is if _Gamma == 2.0, then use gammaCorrectApprox since sqrt will be faster.
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// Also, if _Gamma == 1.0, then there is no effect, so this call could be skipped all together.
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vec4 gammaCorrect(vec4 v, float gamma) {
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return vec4(gammaCorrect(v.xyz, gamma), v.w);
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}
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uniform float _Gamma;
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uniform samplerExternalOES _MainTex;
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varying vec2 uv;
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void main() {
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gl_FragColor = gammaCorrect(texture2D(_MainTex, uv), _Gamma);
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}
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#endif // FRAGMENT
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ENDGLSL
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}
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}
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Fallback "Unlit/Texture"
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}
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