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#include "drape/oglcontext.hpp"
#include "drape/gl_functions.hpp"
#include "base/macros.hpp"
namespace dp
{
namespace
{
glConst DecodeTestFunction(TestFunction depthFunction)
{
switch (depthFunction)
{
case TestFunction::Never: return gl_const::GLNever;
case TestFunction::Less: return gl_const::GLLess;
case TestFunction::Equal: return gl_const::GLEqual;
case TestFunction::LessOrEqual: return gl_const::GLLessOrEqual;
case TestFunction::Greater: return gl_const::GLGreat;
case TestFunction::NotEqual: return gl_const::GLNotEqual;
case TestFunction::GreaterOrEqual: return gl_const::GLGreatOrEqual;
case TestFunction::Always: return gl_const::GLAlways;
}
UNREACHABLE();
}
glConst DecodeStencilFace(StencilFace stencilFace)
{
switch (stencilFace)
{
case StencilFace::Front: return gl_const::GLFront;
case StencilFace::Back: return gl_const::GLBack;
case StencilFace::FrontAndBack: return gl_const::GLFrontAndBack;
}
UNREACHABLE();
}
glConst DecodeStencilAction(StencilAction stencilAction)
{
switch (stencilAction)
{
case StencilAction::Keep: return gl_const::GLKeep;
case StencilAction::Zero: return gl_const::GLZero;
case StencilAction::Replace: return gl_const::GLReplace;
case StencilAction::Increment: return gl_const::GLIncr;
case StencilAction::IncrementWrap: return gl_const::GLIncrWrap;
case StencilAction::Decrement: return gl_const::GLDecr;
case StencilAction::DecrementWrap: return gl_const::GLDecrWrap;
case StencilAction::Invert: return gl_const::GLInvert;
}
UNREACHABLE();
}
} // namespace
void OGLContext::Init(ApiVersion apiVersion)
{
GLFunctions::Init(apiVersion);
GLFunctions::glPixelStore(gl_const::GLUnpackAlignment, 1);
GLFunctions::glClearDepthValue(1.0);
GLFunctions::glDepthFunc(gl_const::GLLessOrEqual);
GLFunctions::glDepthMask(true);
GLFunctions::glFrontFace(gl_const::GLClockwise);
GLFunctions::glCullFace(gl_const::GLBack);
GLFunctions::glEnable(gl_const::GLCullFace);
GLFunctions::glEnable(gl_const::GLScissorTest);
}
ApiVersion OGLContext::GetApiVersion() const
{
return GLFunctions::CurrentApiVersion;
}
std::string OGLContext::GetRendererName() const
{
return GLFunctions::glGetString(gl_const::GLRenderer);
}
std::string OGLContext::GetRendererVersion() const
{
return GLFunctions::glGetString(gl_const::GLVersion);
}
void OGLContext::DebugSynchronizeWithCPU()
{
GLFunctions::glFinish();
}
void OGLContext::SetClearColor(dp::Color const & color)
{
GLFunctions::glClearColor(color.GetRedF(), color.GetGreenF(), color.GetBlueF(), color.GetAlphaF());
}
void OGLContext::Clear(uint32_t clearBits, uint32_t storeBits)
{
UNUSED_VALUE(storeBits);
glConst glBits = 0;
if (clearBits & ClearBits::ColorBit)
glBits |= gl_const::GLColorBit;
if (clearBits & ClearBits::DepthBit)
glBits |= gl_const::GLDepthBit;
if (clearBits & ClearBits::StencilBit)
glBits |= gl_const::GLStencilBit;
GLFunctions::glClear(glBits);
}
void OGLContext::Flush()
{
GLFunctions::glFlush();
}
void OGLContext::SetViewport(uint32_t x, uint32_t y, uint32_t w, uint32_t h)
{
GLCHECK(GLFunctions::glViewport(x, y, w, h));
GLCHECK(GLFunctions::glScissor(x, y, w, h));
}
void OGLContext::SetDepthTestEnabled(bool enabled)
{
if (enabled)
GLFunctions::glEnable(gl_const::GLDepthTest);
else
GLFunctions::glDisable(gl_const::GLDepthTest);
}
void OGLContext::SetDepthTestFunction(TestFunction depthFunction)
{
GLFunctions::glDepthFunc(DecodeTestFunction(depthFunction));
};
void OGLContext::SetStencilTestEnabled(bool enabled)
{
if (enabled)
GLFunctions::glEnable(gl_const::GLStencilTest);
else
GLFunctions::glDisable(gl_const::GLStencilTest);
}
void OGLContext::SetStencilFunction(StencilFace face, TestFunction stencilFunction)
{
GLFunctions::glStencilFuncSeparate(DecodeStencilFace(face), DecodeTestFunction(stencilFunction), 1, 1);
}
void OGLContext::SetStencilActions(StencilFace face, StencilAction stencilFailAction, StencilAction depthFailAction,
StencilAction passAction)
{
GLFunctions::glStencilOpSeparate(DecodeStencilFace(face),
DecodeStencilAction(stencilFailAction),
DecodeStencilAction(depthFailAction),
DecodeStencilAction(passAction));
}
} // namespace dp
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