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/*
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "Texture.h"
#include <AK/Array.h>
#include <AK/RefCounted.h>
#include <AK/Vector.h>
#include <LibGL/GL/gl.h>
#include <LibGL/Tex/MipMap.h>
#include <LibGL/Tex/Sampler2D.h>
#include <LibGfx/Vector2.h>
#include <LibGfx/Vector4.h>
namespace GL {
class Texture2D final : public Texture {
public:
// FIXME: These shouldn't really belong here, they're context specific.
static constexpr u16 MAX_TEXTURE_SIZE = 2048;
static constexpr u8 LOG2_MAX_TEXTURE_SIZE = 11;
public:
Texture2D()
: m_sampler(*this)
{
}
~Texture2D() { }
virtual bool is_texture_2d() const override { return true; }
void upload_texture_data(GLuint lod, GLint internal_format, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid* pixels, GLsizei pixels_per_row, u8 byte_alignment);
void replace_sub_texture_data(GLuint lod, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid* pixels, GLsizei pixels_per_row, u8 byte_alignment);
MipMap const& mipmap(unsigned lod) const
{
if (lod >= m_mipmaps.size())
return m_mipmaps.back();
return m_mipmaps.at(lod);
}
GLenum internal_format() const { return m_internal_format; }
Sampler2D const& sampler() const { return m_sampler; }
Sampler2D& sampler() { return m_sampler; }
int width_at_lod(unsigned level) const { return (level >= m_mipmaps.size()) ? 0 : max(1, m_mipmaps.at(level).width() >> level); }
int height_at_lod(unsigned level) const { return (level >= m_mipmaps.size()) ? 0 : max(1, m_mipmaps.at(level).height() >> level); }
private:
template<typename TCallback>
void swizzle(Vector<u32>& pixels, TCallback&& callback)
{
for (auto& pixel : pixels)
pixel = callback(pixel);
}
private:
// FIXME: Mipmaps are currently unused, but we have the plumbing for it at least
Array<MipMap, LOG2_MAX_TEXTURE_SIZE> m_mipmaps;
GLenum m_internal_format;
Sampler2D m_sampler;
};
}
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