1 // Copyright 2018 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //     https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef THIRD_PARTY_QUIC_TRACE_TOOLS_SHADER_H_
16 #define THIRD_PARTY_QUIC_TRACE_TOOLS_SHADER_H_
17 
18 #include "absl/types/optional.h"
19 #include "tools/render/sdl_util.h"
20 
21 namespace quic_trace {
22 namespace render {
23 
24 // A utility class that wraps a GlProgram and all GlShader objects in it.  This
25 // class also does some preprocessing on shader source: it adds the #version
26 // header and the shared definition of uniform buffer and windowToGl()
27 // subroutine.
28 class Shader : public GlProgram {
29  public:
30   Shader(const char* vertex_code, const char* fragment_code);
31   Shader(const char* vertex_code,
32          const char* geometry_code,
33          const char* fragment_code);
34 
35  private:
36   GlShader vertex_shader_;
37   GlShader fragment_shader_;
38   absl::optional<GlShader> geometry_shader_;
39 };
40 
41 }  // namespace render
42 }  // namespace quic_trace
43 
44 #endif  // THIRD_PARTY_QUIC_TRACE_TOOLS_SHADER_H_
45