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#include "OpenGLTexture.h"
#include <iostream>
namespace Donut
{
OpenGLTexture2D::OpenGLTexture2D(uint32_t width, uint32_t height)
: m_Width(width), m_Height(height)
{
m_InternalFormat = GL_RGBA8;
m_DataFormat = GL_RGBA;
glCreateTextures(GL_TEXTURE_2D, 1, &m_RendererID);
glTextureStorage2D(m_RendererID, 1, m_InternalFormat, m_Width, m_Height);
glTextureParameteri(m_RendererID, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTextureParameteri(m_RendererID, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTextureParameteri(m_RendererID, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTextureParameteri(m_RendererID, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
// TODO(Hachem): Texture Loading
OpenGLTexture2D::OpenGLTexture2D(const std::string& path)
: m_Path(path)
{
m_Width = 1;
m_Height = 1;
m_InternalFormat = GL_RGBA8;
m_DataFormat = GL_RGBA;
glCreateTextures(GL_TEXTURE_2D, 1, &m_RendererID);
glTextureStorage2D(m_RendererID, 1, m_InternalFormat, m_Width, m_Height);
glTextureParameteri(m_RendererID, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTextureParameteri(m_RendererID, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTextureParameteri(m_RendererID, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTextureParameteri(m_RendererID, GL_TEXTURE_WRAP_T, GL_REPEAT);
uint32_t whitePixel = 0xFFFFFFFF;
glTextureSubImage2D(m_RendererID, 0, 0, 0, m_Width, m_Height, m_DataFormat, GL_UNSIGNED_BYTE, &whitePixel);
std::cout << "Created default texture (stb_image not available for loading: " << path << ")" << std::endl;
}
OpenGLTexture2D::~OpenGLTexture2D()
{
glDeleteTextures(1, &m_RendererID);
}
void OpenGLTexture2D::SetData(void* data, uint32_t size)
{
uint32_t bpp = m_DataFormat == GL_RGBA ? 4 : 3;
if (size != m_Width * m_Height * bpp)
{
std::cout << "Data must be entire texture!" << std::endl;
return;
}
glTextureSubImage2D(m_RendererID, 0, 0, 0, m_Width, m_Height, m_DataFormat, GL_UNSIGNED_BYTE, data);
}
void OpenGLTexture2D::Bind(uint32_t slot) const
{
glBindTextureUnit(slot, m_RendererID);
}
void OpenGLTexture2D::BindAsImage(uint32_t slot, bool readOnly) const
{
GLenum access = readOnly ? GL_READ_ONLY : GL_WRITE_ONLY;
glBindImageTexture(slot, m_RendererID, 0, GL_FALSE, 0, access, m_InternalFormat);
}
};
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