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#include "framebuffer.hpp"
#include "drape/glfunctions.hpp"
#include "drape/oglcontext.hpp"
#include "base/assert.hpp"
#include "base/logging.hpp"
#include "base/string_utils.hpp"
#include "math.h"
namespace df
{
Framebuffer::~Framebuffer()
{
Destroy();
}
void Framebuffer::Destroy()
{
if (m_colorTextureId != 0)
{
GLFunctions::glDeleteTexture(m_colorTextureId);
m_colorTextureId = 0;
}
if (m_depthTextureId != 0)
{
GLFunctions::glDeleteTexture(m_depthTextureId);
m_depthTextureId = 0;
}
if (m_framebufferId != 0)
{
GLFunctions::glDeleteFramebuffer(&m_framebufferId);
m_framebufferId = 0;
}
}
void Framebuffer::SetDefaultContext(dp::OGLContext * context)
{
m_defaultContext = context;
}
void Framebuffer::SetSize(uint32_t width, uint32_t height)
{
ASSERT(m_defaultContext, ());
if (!m_isSupported)
return;
if (m_width == width && m_height == height)
return;
m_height = height;
m_width = width;
Destroy();
m_colorTextureId = GLFunctions::glGenTexture();
GLFunctions::glBindTexture(m_colorTextureId);
GLFunctions::glTexImage2D(m_width, m_height, gl_const::GLRGBA, gl_const::GLUnsignedByteType, NULL);
GLFunctions::glTexParameter(gl_const::GLMagFilter, gl_const::GLLinear);
GLFunctions::glTexParameter(gl_const::GLMinFilter, gl_const::GLLinear);
GLFunctions::glTexParameter(gl_const::GLWrapT, gl_const::GLClampToEdge);
GLFunctions::glTexParameter(gl_const::GLWrapS, gl_const::GLClampToEdge);
m_depthTextureId = GLFunctions::glGenTexture();
GLFunctions::glBindTexture(m_depthTextureId);
GLFunctions::glTexImage2D(m_width, m_height, gl_const::GLDepthComponent, gl_const::GLUnsignedIntType, NULL);
GLFunctions::glBindTexture(0);
GLFunctions::glGenFramebuffer(&m_framebufferId);
GLFunctions::glBindFramebuffer(m_framebufferId);
GLFunctions::glFramebufferTexture2D(gl_const::GLColorAttachment, m_colorTextureId);
GLFunctions::glFramebufferTexture2D(gl_const::GLDepthAttachment, m_depthTextureId);
GLFunctions::glFramebufferTexture2D(gl_const::GLStencilAttachment, 0);
uint32_t const status = GLFunctions::glCheckFramebufferStatus();
if (status != gl_const::GLFramebufferComplete)
{
m_isSupported = false;
Destroy();
LOG(LWARNING, ("Framebuffer is unsupported. Framebuffer status =", status));
}
m_defaultContext->setDefaultFramebuffer();
}
void Framebuffer::Enable()
{
ASSERT(m_isSupported, ());
GLFunctions::glBindFramebuffer(m_framebufferId);
}
void Framebuffer::Disable()
{
ASSERT(m_defaultContext, ());
ASSERT(m_isSupported, ());
m_defaultContext->setDefaultFramebuffer();
}
uint32_t Framebuffer::GetTextureId() const
{
return m_colorTextureId;
}
} // namespace df
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