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#include <asura-utils/type.h>
#include "../core_config.h"
#include "gl.h"
#include "shader.h"
#include "matrix_stack.h"
#include "color.h"
using namespace AEMath;
namespace AsuraEngine
{
namespace Graphics
{
#if ASURA_DEBUG
static bool _instantiated = false;
#endif
OpenGL gl;
OpenGL::OpenGL()
: mUpdateMVPMatrix(true)
{
#if ASURA_DEBUG
ASSERT(!_instantiated);
_instantiated = true;
#endif
}
OpenGL::~OpenGL()
{
}
static bool inited = false;
bool OpenGL::Init(const AEMath::Recti& view)
{
bool loaded = false;
#if ASURA_OPENGL_LOADER & ASURA_OPENGL_GLAD
if (!loaded)
loaded = gladLoadGL();
#endif
if (!loaded)
return false;
SetViewport(view);
inited = true;
return true;
}
bool OpenGL::Inited()
{
return inited;
}
void OpenGL::WipeError()
{
while (glGetError() != GL_NO_ERROR);
}
bool OpenGL::HasError()
{
return glGetError() != GL_NO_ERROR;
}
GLenum OpenGL::GetError()
{
return glGetError();
}
void OpenGL::SetDrawColor(float r, float g, float b, float a)
{
state.drawColor.Set(r, g, b, a);
}
Color& OpenGL::GetDrawColor()
{
return state.drawColor;
}
void OpenGL::SetViewport(const Recti v)
{
state.viewport = v;
glViewport(v.x, v.y, v.w, v.h);
}
const Recti& OpenGL::GetViewport()
{
return state.viewport;
}
void OpenGL::UseShader(Shader* shader)
{
if (state.shader != shader)
{
glUseProgram(shader->GetGLProgram());
state.shader = shader;
#if ASURA_GL_PROFILE
++stats.shaderSwitch;
#endif
}
shader->OnUse();
}
void OpenGL::UnuseShader()
{
state.shader->OnUnuse();
state.shader = nullptr;
}
Shader* OpenGL::GetShader()
{
return state.shader;
}
void OpenGL::DrawArrays(GLenum mode, GLint first, GLsizei count)
{
glDrawArrays(mode, first, count);
#if ASURA_GL_PROFILE
++stats.drawCall;
#endif
}
//------------------------------------------------------------------------------//
void OpenGL::SetMatrixMode(MatrixMode mode)
{
state.matrixMode = mode;
}
MatrixMode OpenGL::GetMatrixMode()
{
return state.matrixMode;
}
void OpenGL::PushMatrix()
{
state.matrix[state.matrixMode].Push();
mUpdateMVPMatrix = true;
}
void OpenGL::PopMatrix()
{
state.matrix[state.matrixMode].Pop();
mUpdateMVPMatrix = true;
}
void OpenGL::LoadIdentity()
{
state.matrix[state.matrixMode].LoadIdentity();
mUpdateMVPMatrix = true;
}
void OpenGL::Rotate(float angle)
{
state.matrix[state.matrixMode].Rotate(angle);
mUpdateMVPMatrix = true;
}
void OpenGL::Translate(float x, float y)
{
state.matrix[state.matrixMode].Translate(x, y);
mUpdateMVPMatrix = true;
}
void OpenGL::Scale(float x, float y)
{
state.matrix[state.matrixMode].Scale(x, y);
mUpdateMVPMatrix = true;
}
void OpenGL::Ortho(float l, float r, float b, float t, float n, float f)
{
state.matrix[state.matrixMode].Ortho(l, r, b, t, n, f);
mUpdateMVPMatrix = true;
}
AEMath::Matrix44& OpenGL::GetMatrix(MatrixMode mode)
{
return state.matrix[mode].GetTop();
}
AEMath::Matrix44 OpenGL::GetMVPMatrix()
{
if (mUpdateMVPMatrix)
{
Matrix44& m = state.matrix[MATRIX_MODE_MODEL].GetTop();
Matrix44& v = state.matrix[MATRIX_MODE_VIEW].GetTop();
Matrix44& p = state.matrix[MATRIX_MODE_PROJECTION].GetTop();
state.mvpMatrix = p * (v * m);
mUpdateMVPMatrix = false;
}
return state.mvpMatrix;
}
uint OpenGL::GetMatrixDepth()
{
return state.matrix[state.matrixMode].GetCapacity();
}
uint OpenGL::GetMatrixIndex()
{
return state.matrix[state.matrixMode].GetTopIndex();
}
//------------------------------------------------------------------------------//
}
}
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