void CGraphicsContext::InternalDrawTeardown(SharedPointer<IPipelineState> State)
{
SharedPointer<GL::CPipelineState> PipelineState = std::dynamic_pointer_cast<GL::CPipelineState>(State);
if (PipelineState->DrawWireframe)
{
CheckedGLCall(glPolygonMode(GL_FRONT_AND_BACK, GL_FILL));
}
if (PipelineState->CullFront || PipelineState->CullBack)
{
CheckedGLCall(glDisable(GL_CULL_FACE));
CheckedGLCall(glCullFace(GL_BACK)); // Default value
}
if (PipelineState->DisableDepthTest)
{
CheckedGLCall(glEnable(GL_DEPTH_TEST));
}
if (PipelineState->DisableDepthWrite)
{
CheckedGLCall(glDepthMask(GL_TRUE));
}
if (PipelineState->BlendMode != EBlendMode::None)
{
CheckedGLCall(glDisable(GL_BLEND));
}
int TextureIndex = 0;
for (auto const & it : PipelineState->BoundTextures)
{
CheckedGLCall(glActiveTexture(GL_TEXTURE0 + TextureIndex++));
SharedPointer<CTexture const> Texture = std::dynamic_pointer_cast<CTexture const>(it.second);
CheckedGLCall(glBindTexture(Texture->GetGLBindTextureTarget(), 0));
}
CheckedGLCall(glBindVertexArray(0));
}
void CGraphicsContext::InternalDrawSetup(SharedPointer<IPipelineState> State)
{
SharedPointer<GL::CPipelineState> PipelineState = std::dynamic_pointer_cast<GL::CPipelineState>(State);
if (! PipelineState->Loaded)
{
PipelineState->Load();
}
if (! PipelineState->ShaderProgram)
{
Log::Error("Cannot draw pipeline state with no shader program.");
return;
}
CheckedGLCall(glUseProgram(PipelineState->ShaderProgram->Handle));
CheckedGLCall(glBindVertexArray(PipelineState->VertexArrayHandle));
// Uniforms
for (auto const & it : PipelineState->BoundUniforms)
{
switch (it.second->GetType())
{
case EUniformType::Float:
CheckedGLCall(glUniform1f(it.first, * static_cast<float const *>(it.second->GetData())));
break;
case EUniformType::FloatArray:
CheckedGLCall(glUniform1fv(it.first,
(GLsizei) static_cast<vector<float> const *>(it.second->GetData())->size(),
static_cast<vector<float> const *>(it.second->GetData())->data()
));
break;
case EUniformType::Float2:
CheckedGLCall(glUniform2f(it.first,
static_cast<SVectorBase<float, 2> const *>(it.second->GetData())->Values[0],
static_cast<SVectorBase<float, 2> const *>(it.second->GetData())->Values[1]));
break;
case EUniformType::Float2Array:
{
vector<float> CompactedData;
for (auto const & Vector : *static_cast<vector<vec2f> const *>(it.second->GetData()))
{
CompactedData.push_back(Vector.X);
CompactedData.push_back(Vector.Y);
}
CheckedGLCall(glUniform2fv(it.first,
(GLsizei) CompactedData.size() / 2,
CompactedData.data()
));
break;
}
case EUniformType::Float3:
CheckedGLCall(glUniform3f(it.first,
static_cast<SVectorBase<float, 3> const *>(it.second->GetData())->Values[0],
static_cast<SVectorBase<float, 3> const *>(it.second->GetData())->Values[1],
static_cast<SVectorBase<float, 3> const *>(it.second->GetData())->Values[2]));
break;
case EUniformType::Float3Array:
{
vector<float> CompactedData;
for (auto const & Vector : *static_cast<vector<vec3f> const *>(it.second->GetData()))
{
CompactedData.push_back(Vector.X);
CompactedData.push_back(Vector.Y);
CompactedData.push_back(Vector.Z);
}
CheckedGLCall(glUniform3fv(it.first,
(GLsizei) CompactedData.size() / 3,
CompactedData.data()
));
break;
}
case EUniformType::Float4:
CheckedGLCall(glUniform4f(it.first,
static_cast<SVectorBase<float, 4> const *>(it.second->GetData())->Values[0],
static_cast<SVectorBase<float, 4> const *>(it.second->GetData())->Values[1],
static_cast<SVectorBase<float, 4> const *>(it.second->GetData())->Values[2],
static_cast<SVectorBase<float, 4> const *>(it.second->GetData())->Values[3]));
break;
case EUniformType::Matrix4x4:
CheckedGLCall(glUniformMatrix4fv(it.first, 1, GL_FALSE, glm::value_ptr(* static_cast<glm::mat4 const *>(it.second->GetData()))));
break;
case EUniformType::Matrix4x4Array:
{
vector<float> CompactedData;
for (auto const & Matrix : *static_cast<vector<glm::mat4> const *>(it.second->GetData()))
{
CompactedData.insert(CompactedData.end(), glm::value_ptr(Matrix), glm::value_ptr(Matrix) + 16);
}
CheckedGLCall(glUniformMatrix4fv(it.first, (GLsizei) CompactedData.size() / 16, GL_FALSE, CompactedData.data()));
break;
}
case EUniformType::Int:
CheckedGLCall(glUniform1i(it.first, * static_cast<uint const *>(it.second->GetData())));
break;
case EUniformType::Int2:
CheckedGLCall(glUniform2i(it.first,
static_cast<SVectorBase<int, 2> const *>(it.second->GetData())->Values[0],
static_cast<SVectorBase<int, 2> const *>(it.second->GetData())->Values[1]));
break;
case EUniformType::Int3:
CheckedGLCall(glUniform3i(it.first,
static_cast<SVectorBase<int, 3> const *>(it.second->GetData())->Values[0],
static_cast<SVectorBase<int, 3> const *>(it.second->GetData())->Values[1],
static_cast<SVectorBase<int, 3> const *>(it.second->GetData())->Values[2]));
break;
case EUniformType::Int4:
CheckedGLCall(glUniform4i(it.first,
static_cast<SVectorBase<int, 4> const *>(it.second->GetData())->Values[0],
static_cast<SVectorBase<int, 4> const *>(it.second->GetData())->Values[1],
static_cast<SVectorBase<int, 4> const *>(it.second->GetData())->Values[2],
static_cast<SVectorBase<int, 4> const *>(it.second->GetData())->Values[3]));
break;
default:
Log::Error("Unexpected uniform type during uniform binding: '%s'", GetUniformTypeString(it.second->GetType()));
break;
}
}
// Textures
int TextureIndex = 0;
for (auto const & it : PipelineState->BoundTextures)
{
CheckedGLCall(glUniform1i(it.first, TextureIndex));
CheckedGLCall(glActiveTexture(GL_TEXTURE0 + TextureIndex++));
SharedPointer<CTexture const> Texture = std::dynamic_pointer_cast<CTexture const>(it.second);
CheckedGLCall(glBindTexture(Texture->GetGLBindTextureTarget(), Texture->Handle));
}
// Draw Features
if (PipelineState->DrawWireframe)
{
CheckedGLCall(glPolygonMode(GL_FRONT_AND_BACK, GL_LINE));
}
if (PipelineState->CullFront || PipelineState->CullBack)
{
glEnable(GL_CULL_FACE);
if (! PipelineState->CullFront)
CheckedGLCall(glCullFace(GL_BACK));
else if (! PipelineState->CullBack)
CheckedGLCall(glCullFace(GL_FRONT));
else
CheckedGLCall(glCullFace(GL_FRONT_AND_BACK));
}
if (PipelineState->DisableDepthTest)
{
CheckedGLCall(glDisable(GL_DEPTH_TEST));
}
if (PipelineState->DisableDepthWrite)
{
CheckedGLCall(glDepthMask(GL_FALSE));
}
if (PipelineState->BlendMode != EBlendMode::None)
{
CheckedGLCall(glEnable(GL_BLEND));
if (PipelineState->BlendMode == EBlendMode::Alpha)
{
CheckedGLCall(glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA));
}
else if (PipelineState->BlendMode == EBlendMode::Additive)
{
CheckedGLCall(glBlendFunc(GL_SRC_ALPHA, GL_ONE));
}
}
}
