charcoal/OpenGLEngine/Texture.h

#pragma once

#include "deps.h"

#include "Exception.h"

#include <vector>

namespace charcoal
{
	class Texture
	{
	public:
		enum class Target : GLenum
		{
			TEXTURE_2D = GL_TEXTURE_2D,
			PROXY_TEXTURE_2D = GL_PROXY_TEXTURE_2D,
			TEXTURE_1D_ARRAY = GL_TEXTURE_1D_ARRAY,
			PROXY_TEXTURE_1D_ARRAY = GL_PROXY_TEXTURE_1D_ARRAY,
			TEXTURE_RECTANGLE = GL_TEXTURE_RECTANGLE,
			PROXY_TEXTURE_RECTANGLE = GL_PROXY_TEXTURE_RECTANGLE,
			TEXTURE_CUBE_MAP_POSITIVE_X = GL_TEXTURE_CUBE_MAP_POSITIVE_X,
			TEXTURE_CUBE_MAP_NEGATIVE_X = GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
			TEXTURE_CUBE_MAP_POSITIVE_Y = GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
			TEXTURE_CUBE_MAP_NEGATIVE_Y = GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
			TEXTURE_CUBE_MAP_POSITIVE_Z = GL_TEXTURE_CUBE_MAP_POSITIVE_Z,
			TEXTURE_CUBE_MAP_NEGATIVE_Z = GL_TEXTURE_CUBE_MAP_NEGATIVE_Z,
			PROXY_TEXTURE_CUBE_MAP = GL_PROXY_TEXTURE_CUBE_MAP,
		};

		enum class InternalFormat : GLint
		{
			// Base Internal Formats
			DEPTH_COMPONENT = GL_DEPTH_COMPONENT,
			DEPTH_STENCIL = GL_DEPTH_STENCIL,
			RED = GL_RED,
			RG = GL_RG,
			RGB = GL_RGB,
			RGBA = GL_RGBA,
			// Sized Internal Formats
			R8 = GL_R8,
			R8_SNORM = GL_R8_SNORM,
			R16 = GL_R16,
			R16_SNORM = GL_R16_SNORM,
			RG8 = GL_RG8,
			RG8_SNORM = GL_RG8_SNORM,
			RG16 = GL_RG16,
			RG16_SNORM = GL_RG16_SNORM,
			R3_G3_B2 = GL_R3_G3_B2,
			RGB4 = GL_RGB4,
			RGB5 = GL_RGB5,
			RGB8 = GL_RGB8,
			RGB8_SNORM = GL_RGB8_SNORM,
			RGB10 = GL_RGB10,
			RGB12 = GL_RGB12,
			RGB16_SNORM = GL_RGB16_SNORM,
			RGBA2 = GL_RGBA2,
			RGBA4 = GL_RGBA4,
			RGB5_A1 = GL_RGB5_A1,
			RGBA8 = GL_RGBA8,
			RGBA8_SNORM = GL_RGBA8_SNORM,
			RGB10_A2 = GL_RGB10_A2,
			RGB10_A2UI = GL_RGB10_A2UI,
			RGBA12 = GL_RGBA12,
			RGBA16 = GL_RGBA16,
			SRGB8 = GL_SRGB8,
			SRGB8_ALPHA8 = GL_SRGB8_ALPHA8,
			R16F = GL_R16F,
			RG16F = GL_RG16F,
			RGB16F = GL_RGB16F,
			RGBA16F = GL_RGBA16F,
			R32F = GL_R32F,
			RG32F = GL_RG32F,
			RGB32F = GL_RGB32F,
			RGBA32F = GL_RGBA32F,
			R11F_G11F_B10F = GL_R11F_G11F_B10F,
			RGB9_E5 = GL_RGB9_E5,
			R8I = GL_R8I,
			R8UI = GL_R8UI,
			R16I = GL_R16I,
			R16UI = GL_R16UI,
			R32I = GL_R32I,
			R32UI = GL_R32UI,
			RG8I = GL_RG8I,
			RG8UI = GL_RG8UI,
			RG16I = GL_RG16I,
			RG16UI = GL_RG16UI,
			RG32I = GL_RG32I,
			RG32UI = GL_RG32UI,
			RGB8I = GL_RGB8I,
			RGB8UI = GL_RGB8UI,
			RGB16I = GL_RGB16I,
			RGB16UI = GL_RGB16UI,
			RGB32I = GL_RGB32I,
			RGB32UI = GL_RGB32UI,
			RGBA8I = GL_RGBA8I,
			RGBA8UI = GL_RGBA8UI,
			RGBA16I = GL_RGBA16I,
			RGBA16UI = GL_RGBA16UI,
			RGBA32I = GL_RGBA32I,
			RGBA32UI = GL_RGBA32UI,
			// Compressed Internal Formats
			COMPRESSED_RED = GL_COMPRESSED_RED,
			COMPRESSED_RG = GL_COMPRESSED_RG,
			COMPRESSED_RGB = GL_COMPRESSED_RGB,
			COMPRESSED_RGBA = GL_COMPRESSED_RGBA,
			COMPRESSED_SRGB = GL_COMPRESSED_SRGB,
			COMPRESSED_SRGB_ALPHA = GL_COMPRESSED_SRGB_ALPHA,
			COMPRESSED_RED_RGTC1 = GL_COMPRESSED_RED_RGTC1,
			COMPRESSED_SIGNED_RED_RGTC1 = GL_COMPRESSED_SIGNED_RED_RGTC1,
			COMPRESSED_RG_RGTC2 = GL_COMPRESSED_RG_RGTC2,
			COMPRESSED_SIGNED_RG_RGTC2 = GL_COMPRESSED_SIGNED_RG_RGTC2,
			COMPRESSED_RGBA_BPTC_UNORM = GL_COMPRESSED_RGBA_BPTC_UNORM,
			COMPRESSED_SRGB_ALPHA_BPTC_UNORM = GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM,
			COMPRESSED_RGB_BPTC_SIGNED_FLOAT = GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT,
			COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT = GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT,
		};

		enum class Format : GLenum
		{
			RED = GL_RED,
			RG = GL_RG,
			RGB = GL_RGB,
			BGR = GL_BGR,
			RGBA = GL_RGBA,
			BGRA = GL_BGRA,
			RED_INTEGER = GL_RED_INTEGER,
			RG_INTEGER = GL_RG_INTEGER,
			RGB_INTEGER = GL_RGB_INTEGER,
			BGR_INTEGER = GL_BGR_INTEGER,
			RGBA_INTEGER = GL_RGBA_INTEGER,
			BGRA_INTEGER = GL_BGRA_INTEGER,
			STENCIL_INDEX = GL_STENCIL_INDEX,
			DEPTH_COMPONENT = GL_DEPTH_COMPONENT,
			DEPTH_STENCIL = GL_DEPTH_STENCIL,
		};

		enum class Type : GLenum
		{
			UNSIGNED_BYTE = GL_UNSIGNED_BYTE,
			BYTE = GL_BYTE,
			UNSIGNED_SHORT = GL_UNSIGNED_SHORT,
			SHORT = GL_SHORT,
			UNSIGNED_INT = GL_UNSIGNED_INT,
			INT = GL_INT,
			FLOAT = GL_FLOAT,
			UNSIGNED_BYTE_3_3_2 = GL_UNSIGNED_BYTE_3_3_2,
			UNSIGNED_BYTE_2_3_3_REV = GL_UNSIGNED_BYTE_2_3_3_REV,
			UNSIGNED_SHORT_5_6_5 = GL_UNSIGNED_SHORT_5_6_5,
			UNSIGNED_SHORT_5_6_5_REV = GL_UNSIGNED_SHORT_5_6_5_REV,
			UNSIGNED_SHORT_4_4_4_4 = GL_UNSIGNED_SHORT_4_4_4_4,
			UNSIGNED_SHORT_4_4_4_4_REV = GL_UNSIGNED_SHORT_4_4_4_4_REV,
			UNSIGNED_SHORT_5_5_5_1 = GL_UNSIGNED_SHORT_5_5_5_1,
			UNSIGNED_SHORT_1_5_5_5_REV = GL_UNSIGNED_SHORT_1_5_5_5_REV,
			UNSIGNED_INT_8_8_8_8 = GL_UNSIGNED_INT_8_8_8_8,
			UNSIGNED_INT_8_8_8_8_REV = GL_UNSIGNED_INT_8_8_8_8_REV,
			UNSIGNED_INT_10_10_10_2 = GL_UNSIGNED_INT_10_10_10_2,
			UNSIGNED_INT_2_10_10_10_REV = GL_UNSIGNED_INT_2_10_10_10_REV,
		};

		template <typename T>
		Texture(
			Format data_format,
			Type data_type,
			unsigned long width,
			unsigned long height,
			const std::vector<T>& data,
			InternalFormat internal_format,
			unsigned short mipmap_level = 0,
			Target texture_target = Target::TEXTURE_2D
		)
			: width(width), height(height)
		{
			if (texture_target != Target::TEXTURE_2D)
				throw EXCEPTION("Non 2D textures are not supported yet.");

			glGenTextures(1, &m_texture);

			glBindTexture((GLenum)texture_target, m_texture);

			glTexImage2D((GLenum)texture_target, mipmap_level, (GLint)internal_format, width, height, 0, (GLenum)data_format, (GLenum)data_type, &data[0]);

			glGenerateMipmap((GLenum)texture_target);

			glBindTexture((GLenum)texture_target, NULL);
		}

		~Texture()
		{
			glDeleteTextures(1, &m_texture);
		}

		GLuint get_texture() const { return m_texture; }

	private:
		GLuint m_texture = 0;
		unsigned long width;
		unsigned long height;
	};
}