1 /*
2  * Copyright 2013 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef SF_RENDER_ENGINE_DESCRIPTION_H_
18 #define SF_RENDER_ENGINE_DESCRIPTION_H_
19 
20 #include <renderengine/Texture.h>
21 #include <ui/GraphicTypes.h>
22 
23 namespace android {
24 namespace renderengine {
25 
26 /*
27  * This is the structure that holds the state of the rendering engine.
28  * This class is used to generate a corresponding GLSL program and set the
29  * appropriate uniform.
30  */
31 struct Description {
32     enum class TransferFunction : int {
33         LINEAR,
34         SRGB,
35         ST2084,
36         HLG, // Hybrid Log-Gamma for HDR.
37     };
38 
39     static TransferFunction dataSpaceToTransferFunction(ui::Dataspace dataSpace);
40 
41     Description() = default;
42     ~Description() = default;
43 
44     bool hasInputTransformMatrix() const;
45     bool hasOutputTransformMatrix() const;
46     bool hasColorMatrix() const;
47 
48     // whether textures are premultiplied
49     bool isPremultipliedAlpha = false;
50     // whether this layer is marked as opaque
51     bool isOpaque = true;
52 
53     // corner radius of the layer
54     float cornerRadius = 0;
55 
56     // Size of the rounded rectangle we are cropping to
57     half2 cropSize;
58 
59     // Texture this layer uses
60     Texture texture;
61     bool textureEnabled = false;
62 
63     // color used when texturing is disabled or when setting alpha.
64     half4 color;
65 
66     // true if the sampled pixel values are in Y410/BT2020 rather than RGBA
67     bool isY410BT2020 = false;
68 
69     // transfer functions for the input/output
70     TransferFunction inputTransferFunction = TransferFunction::LINEAR;
71     TransferFunction outputTransferFunction = TransferFunction::LINEAR;
72 
73     float displayMaxLuminance;
74     float maxMasteringLuminance;
75     float maxContentLuminance;
76 
77     // projection matrix
78     mat4 projectionMatrix;
79 
80     // The color matrix will be applied in linear space right before OETF.
81     mat4 colorMatrix;
82     mat4 inputTransformMatrix;
83     mat4 outputTransformMatrix;
84 
85     // True if this layer will draw a shadow.
86     bool drawShadows = false;
87 };
88 
89 } // namespace renderengine
90 } // namespace android
91 
92 #endif /* SF_RENDER_ENGINE_DESCRIPTION_H_ */
93