1/* 2 * Copyright (c) 2016-2017, The Linux Foundation. All rights reserved. 3 * Not a Contribution. 4 * 5 * Copyright 2015 The Android Open Source Project 6 * 7 * Licensed under the Apache License, Version 2.0 (the "License"); 8 * you may not use this file except in compliance with the License. 9 * You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 */ 19 20const char* forward_tonemap_shader = "" 21 "#extension GL_OES_EGL_image_external_essl3 : require \n" 22 "precision highp float; \n" 23 "precision highp sampler2D; \n" 24 "layout(binding = 0) uniform samplerExternalOES externalTexture; \n" 25 "layout(binding = 1) uniform sampler3D tonemapper; \n" 26 "layout(binding = 2) uniform sampler2D xform; \n" 27 "layout(location = 3) uniform vec2 tSO; \n" 28 "#ifdef USE_NONUNIFORM_SAMPLING \n" 29 "layout(location = 4) uniform vec2 xSO; \n" 30 "#endif \n" 31 "in vec2 uv; \n" 32 "out vec4 fs_color; \n" 33 " \n" 34 "vec3 ScaleOffset(in vec3 samplePt, in vec2 so) \n" 35 "{ \n" 36 " vec3 adjPt = so.x * samplePt + so.y; \n" 37 " return adjPt; \n" 38 "} \n" 39 " \n" 40 "void main() \n" 41 "{ \n" 42 "vec2 flipped = vec2(uv.x, 1.0f - uv.y); \n" 43 "vec4 rgb = texture(externalTexture, flipped); \n" 44 "#ifdef USE_NONUNIFORM_SAMPLING \n" 45 "vec3 adj = ScaleOffset(rgb.xyz, xSO); \n" 46 "float r = texture(xform, vec2(adj.r, 0.5f)).r; \n" 47 "float g = texture(xform, vec2(adj.g, 0.5f)).g; \n" 48 "float b = texture(xform, vec2(adj.b, 0.5f)).b; \n" 49 "#else \n" 50 "float r = rgb.r; \n" 51 "float g = rgb.g; \n" 52 "float b = rgb.b; \n" 53 "#endif \n" 54 "fs_color.rgb = texture(tonemapper, ScaleOffset(vec3(r, g, b), tSO)).rgb; \n" 55 "} \n"; 56