image.h

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#pragma once
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
#include "ids/id.h"
#include "ids/idallocator.h"
#include "pixelformat.h"
#include "io/uri.h"
namespace CoreGraphics
{
 
ID_24_8_TYPE(ImageId);
 
 
struct ImageCreateInfoFile
{
    IO::URI path;
    bool convertTo32Bit;
};
 
struct ImageCreateInfoData
{
    CoreGraphics::PixelFormat format;
    SizeT width, height, depth;
    void* data;
};
 
enum ImageContainer
{
    PNG,
    JPEG,
    TGA,
    HDR
};
 
enum ImageChannelPrimitive
{
    Bit8UInt,
    Bit16UInt,
    Bit16Float,
    Bit32UInt,
    Bit32Float
};

ImageId CreateImage(const ImageCreateInfoFile& info);
ImageId CreateImage(const ImageCreateInfoData& info);
ImageId CreateImage(const CoreGraphics::TextureId tex, CoreGraphics::PipelineStage stage);
void DestroyImage(const ImageId id);
 
struct ImageDimensions
{
    SizeT width, height;
};

ImageDimensions ImageGetDimensions(const ImageId id);

const ubyte* ImageGetBuffer(const ImageId id);
const SizeT ImageGetPixelStride(const ImageId id);
const SizeT ImageGetChannelStride(const ImageId id);
void ImageConvertPrimitive(const ImageId id, const ImageChannelPrimitive primitive, bool denormalize);

bool ImageSaveToFile(const ImageId id, const ImageContainer container, const IO::URI& path);

ImageChannelPrimitive ImageGetChannelPrimitive(const ImageId id);
 
struct ImageLoadInfo
{
    SizeT width, height, channels;
    ImageChannelPrimitive primitive;
    PixelFormat::Code format;
    uint8_t redOffset, greenOffset, blueOffset, alphaOffset;
 
    union ImageData
    {
        unsigned char* stbiData8;
        unsigned short* stbiData16;
        unsigned int* stbiData32;
        float* stbiDataFloat;
    } data;
};
 
typedef Ids::IdAllocator<
    ImageLoadInfo
> ImageAllocator;
extern ImageAllocator imageAllocator;
 
} // namespace CoreGraphics