OpenglTexture.h

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#pragma once
 
#include "RenderCore/ghi_fwd.h"
#include "RenderCore/ghi_enums.h"
 
#include "ThirdParty/glad2.h"
 
#include <Common/primitive_type.h>
#include <Math/math_fwd.h>
#include <Utility/TSpan.h>
 
#include <cstddef>
 
namespace ph::editor::ghi
{
 
class OpenglTexture final
{
public:
    GLuint textureID = 0;
    GLsizei widthPx = 0;
    GLsizei heightPx = 0;
    GLenum internalFormat = GL_NONE;
    GLenum filterType = GL_LINEAR;
    GLenum wrapType = GL_REPEAT;
    GLsizei numSamples = 1;
    uint32 numPixelComponents : 3 = 0;
    uint32 isImmutableStorage : 1 = false;
 
    void create(const TextureDesc& desc);
    void createImmutableStorage(const TextureDesc& desc);
    void createMultiSampled(const TextureDesc& desc);
 
    void uploadPixelData(
        TSpanView<std::byte> pixelData,
        EPixelFormat pixelFormat,
        EPixelComponent pixelComponent);
 
    void uploadPixelData(
        const math::Vector2UI& regionOriginPx,
        const math::Vector2UI& regionSizePx,
        TSpanView<std::byte> pixelData,
        EPixelFormat pixelFormat,
        EPixelComponent pixelComponent);
 
    void uploadPixelData(
        const math::Vector3UI& newTextureSizePx,
        TSpanView<std::byte> pixelData,
        EPixelFormat pixelFormat,
        EPixelComponent pixelComponent);
 
    void bindNonDSATexture() const;
    void bindSlot(uint32 slotIndex) const;
    void destroy();
    bool isColor() const;
 
    std::size_t numPixels() const
    {
        return static_cast<std::size_t>(widthPx) * heightPx;
    }
 
    bool isMultiSampled() const
    {
        return numSamples > 1;
    }
 
    bool hasResource() const
    {
        return textureID != 0;
    }
};
 
}// end namespace ph::editor::ghi