1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
* Copyright (c) 2008-2016, NVIDIA CORPORATION. All rights reserved.
*
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, related documentation
* and any modifications thereto. Any use, reproduction, disclosure or
* distribution of this software and related documentation without an express
* license agreement from NVIDIA CORPORATION is strictly prohibited.
*/
#if SUPPORT_GL
#include "Shaders_GL.h"
using namespace GFSDK::SSAO::GL;
//--------------------------------------------------------------------------------
static char* g_FullscreenTriangle_VS_GLSL =
(char*) STRINGIFY(
out vec4 VtxGeoOutput1;
void main()
{
vec2 TexCoords = vec2( (gl_VertexID << 1) & 2, gl_VertexID & 2 );
gl_Position = vec4( TexCoords * vec2( 2.0, 2.0 ) + vec2( -1.0, -1.0) , 0.0, 1.0 );
VtxGeoOutput1 = vec4( TexCoords, 0.0, 0.0 );
}
);
//--------------------------------------------------------------------------------
void GLSLPrograms::CopyDepth_PS::Create(const GFSDK_SSAO_GLFunctions& GL, const char *FragmentShaderSource)
{
GLSLProgram::Create(GL, g_FullscreenTriangle_VS_GLSL, FragmentShaderSource);
m_DepthTexture = GetUniformLocation(GL, "g_t0");
ASSERT(m_DepthTexture != -1);
}
//--------------------------------------------------------------------------------
void GLSLPrograms::LinearizeDepth_PS::Create(const GFSDK_SSAO_GLFunctions& GL, const char *FragmentShaderSource)
{
GLSLProgram::Create(GL, g_FullscreenTriangle_VS_GLSL, FragmentShaderSource);
m_DepthTexture = GetUniformLocation(GL, "g_t0");
m_GlobalUniformBlock = GetUniformBlockIndex(GL, "GlobalConstantBuffer");
GL.glUniformBlockBinding(m_Program, m_GlobalUniformBlock, BaseConstantBuffer::BINDING_POINT_GLOBAL_UBO);
ASSERT_GL_ERROR(GL);
}
//--------------------------------------------------------------------------------
void GLSLPrograms::DeinterleaveDepth_PS::Create(const GFSDK_SSAO_GLFunctions& GL, const char *FragmentShaderSource)
{
GLSLProgram::Create(GL, g_FullscreenTriangle_VS_GLSL, FragmentShaderSource);
m_DepthTexture = GetUniformLocation(GL, "g_t0");
m_GlobalUniformBlock = GetUniformBlockIndex(GL, "GlobalConstantBuffer");
m_PerPassUniformBlock = GetUniformBlockIndex(GL, "PerPassConstantBuffer");
GL.glUniformBlockBinding(m_Program, m_GlobalUniformBlock, BaseConstantBuffer::BINDING_POINT_GLOBAL_UBO);
GL.glUniformBlockBinding(m_Program, m_PerPassUniformBlock, BaseConstantBuffer::BINDING_POINT_PER_PASS_UBO);
ASSERT_GL_ERROR(GL);
}
//--------------------------------------------------------------------------------
void GLSLPrograms::ReconstructNormal_PS::Create(const GFSDK_SSAO_GLFunctions& GL, const char *FragmentShaderSource)
{
GLSLProgram::Create(GL, g_FullscreenTriangle_VS_GLSL, FragmentShaderSource);
m_FullResDepthTexture = GetUniformLocation(GL, "g_t0");
m_FullResNormalTexture = GetUniformLocation(GL, "g_t1");
m_GlobalUniformBlock = GetUniformBlockIndex(GL, "GlobalConstantBuffer");
if (m_GlobalUniformBlock != GL_INVALID_INDEX)
{
GL.glUniformBlockBinding(m_Program, m_GlobalUniformBlock, BaseConstantBuffer::BINDING_POINT_GLOBAL_UBO);
}
ASSERT_GL_ERROR(GL);
}
//--------------------------------------------------------------------------------
void GLSLPrograms::CoarseAO_PS::Create(const GFSDK_SSAO_GLFunctions& GL, const char *FragmentShaderSource)
{
static const char *VertexShaderSource =
STRINGIFY(
void main()
{
gl_Position = vec4(0);
}
);
static const char *GeometryShaderSource =
// Must match the uniform declaration from shaders/out/GL/CoarseAO_PS.cpp
STRINGIFY(
layout(std140) uniform;
struct PerPassConstantBuffer_0_Type
{
vec4 f4Jitter;
vec2 f2Offset;
float fSliceIndex;
uint uSliceIndex;
};
uniform PerPassConstantBuffer
{
PerPassConstantBuffer_0_Type PerPassConstantBuffer_0;
};
)
STRINGIFY(
layout(points) in;
layout(triangle_strip, max_vertices = 3) out;
void main()
{
gl_Layer = int(PerPassConstantBuffer_0.uSliceIndex);
for (int VertexID = 0; VertexID < 3; VertexID++)
{
vec2 texCoords = vec2( (VertexID << 1) & 2, VertexID & 2 );
gl_Position = vec4( texCoords * vec2( 2.0, 2.0 ) + vec2( -1.0, -1.0) , 0.0, 1.0 );
EmitVertex();
}
EndPrimitive();
}
);
GLSLProgram::Create(GL, VertexShaderSource, GeometryShaderSource, FragmentShaderSource);
m_QuarterResDepthTexture = GetUniformLocation(GL, "g_t0");
m_FullResNormalTexture = GetUniformLocation(GL, "g_t1");
m_GlobalUniformBlock = GetUniformBlockIndex(GL, "GlobalConstantBuffer");
m_PerPassUniformBlock = GetUniformBlockIndex(GL, "PerPassConstantBuffer");
GL.glUniformBlockBinding(m_Program, m_GlobalUniformBlock, BaseConstantBuffer::BINDING_POINT_GLOBAL_UBO);
GL.glUniformBlockBinding(m_Program, m_PerPassUniformBlock, BaseConstantBuffer::BINDING_POINT_PER_PASS_UBO);
ASSERT_GL_ERROR(GL);
}
//--------------------------------------------------------------------------------
void GLSLPrograms::ReinterleaveAO_PS::Create(const GFSDK_SSAO_GLFunctions& GL, const char *FragmentShaderSource)
{
GLSLProgram::Create(GL, g_FullscreenTriangle_VS_GLSL, FragmentShaderSource);
m_AOTexture = GetUniformLocation(GL, "g_t0");
m_DepthTexture = GetUniformLocation(GL, "g_t1");
m_GlobalUniformBlock = GetUniformBlockIndex(GL, "GlobalConstantBuffer");
if (m_GlobalUniformBlock != GL_INVALID_INDEX)
{
GL.glUniformBlockBinding(m_Program, m_GlobalUniformBlock, BaseConstantBuffer::BINDING_POINT_GLOBAL_UBO);
ASSERT_GL_ERROR(GL);
}
}
//--------------------------------------------------------------------------------
void GLSLPrograms::Blur_PS::Create(const GFSDK_SSAO_GLFunctions& GL, const char *FragmentShaderSource)
{
GLSLProgram::Create(GL, g_FullscreenTriangle_VS_GLSL, FragmentShaderSource);
m_AODepthTextureNearest = GetUniformLocation(GL, "g_t0");
m_AODepthTextureLinear = GetUniformLocation(GL, "g_t1");
m_GlobalUniformBlock = GetUniformBlockIndex(GL, "GlobalConstantBuffer");
GL.glUniformBlockBinding(m_Program, m_GlobalUniformBlock, BaseConstantBuffer::BINDING_POINT_GLOBAL_UBO);
ASSERT_GL_ERROR(GL);
}
//--------------------------------------------------------------------------------
namespace GFSDK
{
namespace SSAO
{
namespace GL
{
#include "shaders/out/GL/CopyDepth_PS.cpp"
#include "shaders/out/GL/LinearizeDepth_PS.cpp"
#include "shaders/out/GL/DeinterleaveDepth_PS.cpp"
#include "shaders/out/GL/DebugNormals_PS.cpp"
#include "shaders/out/GL/ReconstructNormal_PS.cpp"
#include "shaders/out/GL/ReinterleaveAO_PS.cpp"
#include "shaders/out/GL/BlurX_PS.cpp"
#include "shaders/out/GL/BlurY_PS.cpp"
#include "shaders/out/GL/CoarseAO_PS.cpp"
} // namespace GL
} // namespace SSAO
} // namespace GFSDK
#endif // SUPPORT_GL
|