//====== Copyright � 1996-2008, Valve Corporation, All rights reserved. =======
//
// Purpose: public interface to user remote file storage in Steam
//
//=============================================================================

#ifndef ISTEAMSCREENSHOTS_H
#define ISTEAMSCREENSHOTS_H
#ifdef _WIN32
#pragma once
#endif

#include "steam_api_common.h"

const uint32 k_nScreenshotMaxTaggedUsers = 32;
const uint32 k_nScreenshotMaxTaggedPublishedFiles = 32;
const int k_cubUFSTagTypeMax = 255;
const int k_cubUFSTagValueMax = 255;

// Required with of a thumbnail provided to AddScreenshotToLibrary.  If you do not provide a thumbnail
// one will be generated.
const int k_ScreenshotThumbWidth = 200;

// Handle is valid for the lifetime of your process and no longer
typedef uint32 ScreenshotHandle;
#define INVALID_SCREENSHOT_HANDLE 0

enum EVRScreenshotType {
    k_EVRScreenshotType_None = 0,
    k_EVRScreenshotType_Mono = 1,
    k_EVRScreenshotType_Stereo = 2,
    k_EVRScreenshotType_MonoCubemap = 3,
    k_EVRScreenshotType_MonoPanorama = 4,
    k_EVRScreenshotType_StereoPanorama = 5
};

//-----------------------------------------------------------------------------
// Purpose: Functions for adding screenshots to the user's screenshot library
//-----------------------------------------------------------------------------
class ISteamScreenshots {
public:
    // Writes a screenshot to the user's screenshot library given the raw image data, which must be in RGB format.
    // The return value is a handle that is valid for the duration of the game process and can be used to apply tags.
    virtual ScreenshotHandle WriteScreenshot(void* pubRGB, uint32 cubRGB, int nWidth, int nHeight) = 0;

    // Adds a screenshot to the user's screenshot library from disk.  If a thumbnail is provided, it must be 200 pixels wide and the same aspect ratio
    // as the screenshot, otherwise a thumbnail will be generated if the user uploads the screenshot.  The screenshots must be in either JPEG or TGA format.
    // The return value is a handle that is valid for the duration of the game process and can be used to apply tags.
    // JPEG, TGA, and PNG formats are supported.
    virtual ScreenshotHandle AddScreenshotToLibrary(const char* pchFilename, const char* pchThumbnailFilename, int nWidth, int nHeight) = 0;

    // Causes the Steam overlay to take a screenshot.  If screenshots are being hooked by the game then a ScreenshotRequested_t callback is sent back to the game instead.
    virtual void TriggerScreenshot() = 0;

    // Toggles whether the overlay handles screenshots when the user presses the screenshot hotkey, or the game handles them.  If the game is hooking screenshots,
    // then the ScreenshotRequested_t callback will be sent if the user presses the hotkey, and the game is expected to call WriteScreenshot or AddScreenshotToLibrary
    // in response.
    virtual void HookScreenshots(bool bHook) = 0;

    // Sets metadata about a screenshot's location (for example, the name of the map)
    virtual bool SetLocation(ScreenshotHandle hScreenshot, const char* pchLocation) = 0;

    // Tags a user as being visible in the screenshot
    virtual bool TagUser(ScreenshotHandle hScreenshot, CSteamID steamID) = 0;

    // Tags a published file as being visible in the screenshot
    virtual bool TagPublishedFile(ScreenshotHandle hScreenshot, PublishedFileId_t unPublishedFileID) = 0;

    // Returns true if the app has hooked the screenshot
    virtual bool IsScreenshotsHooked() = 0;

    // Adds a VR screenshot to the user's screenshot library from disk in the supported type.
    // pchFilename should be the normal 2D image used in the library view
    // pchVRFilename should contain the image that matches the correct type
    // The return value is a handle that is valid for the duration of the game process and can be used to apply tags.
    // JPEG, TGA, and PNG formats are supported.
    virtual ScreenshotHandle AddVRScreenshotToLibrary(EVRScreenshotType eType, const char* pchFilename, const char* pchVRFilename) = 0;
};

#define STEAMSCREENSHOTS_INTERFACE_VERSION "STEAMSCREENSHOTS_INTERFACE_VERSION003"

// Global interface accessor
inline ISteamScreenshots* SteamScreenshots();
STEAM_DEFINE_USER_INTERFACE_ACCESSOR(ISteamScreenshots*, SteamScreenshots, STEAMSCREENSHOTS_INTERFACE_VERSION);

// callbacks
#if defined(VALVE_CALLBACK_PACK_SMALL)
#pragma pack(push, 4)
#elif defined(VALVE_CALLBACK_PACK_LARGE)
#pragma pack(push, 8)
#else
#error steam_api_common.h should define VALVE_CALLBACK_PACK_xxx
#endif
//-----------------------------------------------------------------------------
// Purpose: Screenshot successfully written or otherwise added to the library
// and can now be tagged
//-----------------------------------------------------------------------------
struct ScreenshotReady_t {
    enum { k_iCallback = k_iSteamScreenshotsCallbacks + 1 };
    ScreenshotHandle m_hLocal;
    EResult m_eResult;
};

//-----------------------------------------------------------------------------
// Purpose: Screenshot has been requested by the user.  Only sent if
// HookScreenshots() has been called, in which case Steam will not take
// the screenshot itself.
//-----------------------------------------------------------------------------
struct ScreenshotRequested_t {
    enum { k_iCallback = k_iSteamScreenshotsCallbacks + 2 };
};

#pragma pack(pop)

#endif // ISTEAMSCREENSHOTS_H