78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
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// Copyright 2017 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "VideoBackends/OGL/OGLShader.h"
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#include "VideoBackends/OGL/ProgramShaderCache.h"
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namespace OGL
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{
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static GLenum GetGLShaderTypeForStage(ShaderStage stage)
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{
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switch (stage)
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{
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case ShaderStage::Vertex:
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return GL_VERTEX_SHADER;
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case ShaderStage::Geometry:
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return GL_GEOMETRY_SHADER;
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case ShaderStage::Pixel:
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return GL_FRAGMENT_SHADER;
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case ShaderStage::Compute:
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return GL_COMPUTE_SHADER;
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default:
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return 0;
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}
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}
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OGLShader::OGLShader(ShaderStage stage, GLenum gl_type, GLuint shader_id)
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: AbstractShader(stage), m_type(gl_type), m_id(shader_id)
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{
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}
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OGLShader::OGLShader(GLuint compute_program_id)
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: AbstractShader(ShaderStage::Compute), m_type(GL_COMPUTE_SHADER), m_id(compute_program_id)
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{
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}
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OGLShader::~OGLShader()
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{
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if (m_stage != ShaderStage::Compute)
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glDeleteShader(m_id);
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else
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glDeleteProgram(m_compute_program_id);
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}
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bool OGLShader::HasBinary() const
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{
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// NOTE: GL shaders do not have binaries, programs do.
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return false;
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}
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AbstractShader::BinaryData OGLShader::GetBinary() const
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{
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return {};
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}
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std::unique_ptr<OGLShader> OGLShader::CreateFromSource(ShaderStage stage, const char* source,
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size_t length)
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{
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if (stage != ShaderStage::Compute)
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{
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GLenum shader_type = GetGLShaderTypeForStage(stage);
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GLuint shader_id =
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ProgramShaderCache::CompileSingleShader(shader_type, std::string(source, length));
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if (!shader_id)
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return nullptr;
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return std::make_unique<OGLShader>(stage, shader_type, shader_id);
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}
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// Compute shaders.
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SHADER prog;
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if (!ProgramShaderCache::CompileComputeShader(prog, std::string(source, length)))
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return nullptr;
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return std::make_unique<OGLShader>(prog.glprogid);
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}
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} // namespace OGL
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