49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
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#include "ltpch.h"
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#include "glTexture.h"
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#include <glad/glad.h>
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namespace Light {
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glTexture::glTexture(unsigned int width, unsigned int height, unsigned int components, unsigned char* pixels)
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{
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// create texture
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glCreateTextures(GL_TEXTURE_2D, 1, &m_TextureID);
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// texture parameters
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glTextureParameteri(m_TextureID, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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glTextureParameteri(m_TextureID, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTextureParameteri(m_TextureID, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTextureParameteri(m_TextureID, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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// vocab = 0
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unsigned int format = components == 4u ? GL_RGBA :
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components == 3u ? GL_RGB :
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components == 2u ? GL_RG :
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components == 1u ? GL_RED : NULL;
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unsigned int internalFormat = format == GL_RGBA ? GL_RGBA8 :
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format == GL_RGB ? GL_RGB8 :
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format == GL_RG ? GL_RG8 :
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format == GL_RED ? GL_R8 : NULL;
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// check
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LT_ENGINE_ASSERT(format, "glTexture::glTexture: invalid number of components: {}", components);
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Bind();
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glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format, GL_UNSIGNED_BYTE, pixels);
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glGenerateMipmap(GL_TEXTURE_2D);
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}
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glTexture::~glTexture()
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{
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glDeleteTextures(1, &m_TextureID);
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}
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void glTexture::Bind(unsigned int slot/*= 0*/)
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{
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glActiveTexture(GL_TEXTURE0 + slot);
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glBindTexture(GL_TEXTURE_2D, m_TextureID);
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}
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}
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