61 lines
5.0 KiB
C++
61 lines
5.0 KiB
C++
/*
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* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
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* Not a Contribution.
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*
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* Copyright 2015 The Android Open Source Project
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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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*/
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const char* rgba_inverse_tonemap_shader = ""
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"#extension GL_OES_EGL_image_external_essl3 : require \n"
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"precision highp float; \n"
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"precision highp sampler2D; \n"
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"layout(binding = 0) uniform samplerExternalOES externalTexture; \n"
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"layout(binding = 1) uniform sampler3D tonemapper; \n"
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"layout(binding = 2) uniform sampler2D xform; \n"
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"layout(location = 3) uniform vec2 tSO; \n"
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"#if defined(USE_NONUNIFORM_SAMPLING) \n"
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"layout(location = 4) uniform vec2 xSO; \n"
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"#endif \n"
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"in vec2 uv; \n"
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"out vec4 fs_color; \n"
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" \n"
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"vec3 ScaleOffset(in vec3 samplePt, in vec2 so) \n"
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"{ \n"
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" vec3 adjPt = so.x * samplePt + so.y; \n"
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" return adjPt; \n"
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"} \n"
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" \n"
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"void main() \n"
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"{ \n"
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"vec2 flipped = vec2(uv.x, 1.0f - uv.y); \n"
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"vec4 rgb_premulalpha = texture(externalTexture, flipped); \n"
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"fs_color = rgb_premulalpha; \n"
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"if( rgb_premulalpha.a > 0.0 ) { \n"
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"vec3 rgb = rgb_premulalpha.rgb/rgb_premulalpha.a; \n"
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"#if defined(USE_NONUNIFORM_SAMPLING) \n"
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"vec3 adj = ScaleOffset(rgb.xyz, xSO); \n"
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"float r = texture(xform, vec2(adj.r, 0.5f)).r; \n"
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"float g = texture(xform, vec2(adj.g, 0.5f)).g; \n"
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"float b = texture(xform, vec2(adj.b, 0.5f)).b; \n"
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"#else \n"
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"float r = rgb.r; \n"
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"float g = rgb.g; \n"
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"float b = rgb.b; \n"
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"#endif \n"
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"fs_color.rgb = texture(tonemapper, ScaleOffset(vec3(r, g, b), tSO)).rgb * rgb_premulalpha.a; \n"
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"fs_color.a = rgb_premulalpha.a; \n"
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"} \n"
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"} \n";
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