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Diffstat (limited to 'src/3rdparty/angle/src/compiler/translator/DeclareAndInitBuiltinsForInstancedMultiview.h')
| -rw-r--r-- | src/3rdparty/angle/src/compiler/translator/DeclareAndInitBuiltinsForInstancedMultiview.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/DeclareAndInitBuiltinsForInstancedMultiview.h b/src/3rdparty/angle/src/compiler/translator/DeclareAndInitBuiltinsForInstancedMultiview.h new file mode 100644 index 0000000000..b4ab05fd0e --- /dev/null +++ b/src/3rdparty/angle/src/compiler/translator/DeclareAndInitBuiltinsForInstancedMultiview.h @@ -0,0 +1,48 @@ +// +// Copyright (c) 2017 The ANGLE Project Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +// +// Regardless of the shader type, the following AST transformations are applied: +// - Add declaration of View_ID_OVR. +// - Replace every occurrence of gl_ViewID_OVR with ViewID_OVR, mark ViewID_OVR as internal and +// declare it as a flat varying. +// +// If the shader type is a vertex shader, the following AST transformations are applied: +// - Replace every occurrence of gl_InstanceID with InstanceID, mark InstanceID as internal and set +// its qualifier to EvqTemporary. +// - Add initializers of ViewID_OVR and InstanceID to the beginning of the body of main. The pass +// should be executed before any variables get collected so that usage of gl_InstanceID is recorded. +// - If the output is ESSL or GLSL and the SH_SELECT_VIEW_IN_NV_GLSL_VERTEX_SHADER option is +// enabled, the expression +// "if (multiviewBaseViewLayerIndex < 0) { +// gl_ViewportIndex = int(ViewID_OVR); +// } else { +// gl_Layer = int(ViewID_OVR) + multiviewBaseViewLayerIndex; +// }" +// is added after ViewID and InstanceID are initialized. Also, MultiviewRenderPath is added as a +// uniform. +// + +#ifndef COMPILER_TRANSLATOR_DECLAREANDINITBUILTINSFORINSTANCEDMULTIVIEW_H_ +#define COMPILER_TRANSLATOR_DECLAREANDINITBUILTINSFORINSTANCEDMULTIVIEW_H_ + +#include "GLSLANG/ShaderLang.h" +#include "angle_gl.h" + +namespace sh +{ + +class TIntermBlock; +class TSymbolTable; + +void DeclareAndInitBuiltinsForInstancedMultiview(TIntermBlock *root, + unsigned numberOfViews, + GLenum shaderType, + ShCompileOptions compileOptions, + ShShaderOutput shaderOutput, + TSymbolTable *symbolTable); + +} // namespace sh + +#endif // COMPILER_TRANSLATOR_DECLAREANDINITBUILTINSFORINSTANCEDMULTIVIEW_H_
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