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102 lines
2.3 KiB
C++
102 lines
2.3 KiB
C++
/******************************************************************************
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* File - texture.h
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* Author - Joey Pollack
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* Date - 2022/07/14 (y/m/d)
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* Mod Date - 2022/07/14 (y/m/d)
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* Description - OpenGL texture 2D
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******************************************************************************/
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#include "texture.h"
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#include <glad/gl.h>
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namespace lunarium
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{
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Texture::Texture()
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: mGLID(0), mWidth(0), mHeight(0), mFormat(TextureFormat::RGBA)
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{
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}
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Texture* Texture::Create(u8* data, u32 width, u32 height, TextureFormat format)
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{
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u32 formats[2] = { GL_RGB, GL_RGBA };
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Texture* t = new Texture();
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t->mFormat = format;
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t->mWidth = width;
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t->mHeight = height;
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glGenTextures(1, &t->mGLID);
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t->Bind();
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glTexImage2D(GL_TEXTURE_2D, 0, formats[(int)format], width, height, 0, formats[(int)format], GL_UNSIGNED_BYTE, data);
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glGenerateMipmap(GL_TEXTURE_2D);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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t->Unbind();
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return t;
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}
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void Texture::Destroy(Texture** ppTex)
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{
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(*ppTex)->Unbind();
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glDeleteTextures(1, &(*ppTex)->mGLID);
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(*ppTex) = nullptr;
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}
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void Texture::Bind(u32 slot) const
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{
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glBindTextureUnit(slot, mGLID);
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}
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void Texture::Unbind() const
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{
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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u32 Texture::GetGLID() const
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{
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return mGLID;
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}
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u64 Texture::GetGLID64() const
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{
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return (u64) mGLID;
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}
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TextureFormat Texture::GetFormat() const
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{
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return mFormat;
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}
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u32 Texture::GetWidth() const
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{
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return mWidth;
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}
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u32 Texture::GetHeight() const
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{
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return mHeight;
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}
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u8* Texture::GetPixels() const
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{
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u32 format_size[2] = { 3, 4 };
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u32 formats[2] = { GL_RGB, GL_RGBA };
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u8* buffer = new u8[mWidth * mHeight * format_size[(int)mFormat]];
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Bind();
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glGetTexImage(GL_TEXTURE_2D, 0, formats[(int)mFormat], GL_UNSIGNED_BYTE, (void*)buffer);
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Unbind();
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return buffer;
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}
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} |