1 /*
 2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
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24  */
25 
26 #ifndef COMMON_H
27 #define COMMON_H
28 
29 #include <simd/SIMD.h>
30 
31 #define PGRAM_VERTEX_COUNT 6
32 #define QUAD_VERTEX_COUNT 4
33 
34 enum VertexAttributes {
35     VertexAttributePosition = 0,
36     VertexAttributeTexPos = 1
37 };
38 
39 enum BufferIndex  {
40     MeshVertexBuffer = 0,
41     FrameUniformBuffer = 1,
42     MatrixBuffer = 2
43 };
44 
45 struct FrameUniforms {
46     vector_float4 color;
47 };
48 
49 struct TransformMatrix {
50     matrix_float4x4 transformMatrix;
51 };
52 
53 struct GradFrameUniforms {
54     vector_float3 params;
55     vector_float4 color1;
56     vector_float4 color2;
57 };
58 
59 struct Vertex {
60     float position[2];
61 };
62 
63 struct TxtVertex {
64     float position[2];
65     float txtpos[2];
66 };
67 
68 #define INTERPOLATION_NEAREST_NEIGHBOR 0
69 #define INTERPOLATION_BILINEAR 1
70 // NOTE: Metal samplers doesn't supports bicubic interpolation
71 // see table 2.7 from https://developer.apple.com/metal/Metal-Shading-Language-Specification.pdf
72 // (probably we need to implement separate fragment shader with bicubic interpolation)
73 
74 struct TxtFrameUniforms {
75     vector_float4 color;
76     int mode; // NOTE: consider to use bit fields
77     int isSrcOpaque;
78     int isDstOpaque;
79     float extraAlpha;
80 };
81 
82 struct AnchorData
83 {
84     vector_float3 xParams;
85     vector_float3 yParams;
86 };
87 
88 struct LCDFrameUniforms {
89     vector_float3 src_adj;
90     vector_float3 gamma;
91     vector_float3 invgamma;
92 };
93 #endif