// Copyright 2012-2020 David Robillard <d@drobilla.net>
// SPDX-License-Identifier: ISC

#ifndef PUGL_DETAIL_TYPES_H
#define PUGL_DETAIL_TYPES_H

#include "pugl/pugl.h"

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>

// Unused parameter macro to suppresses warnings and make it impossible to use
#if defined(__cplusplus)
#  define PUGL_UNUSED(name)
#elif defined(__GNUC__) || defined(__clang__)
#  define PUGL_UNUSED(name) name##_unused __attribute__((__unused__))
#else
#  define PUGL_UNUSED(name) name
#endif

/// Platform-specific world internals
typedef struct PuglWorldInternalsImpl PuglWorldInternals;

/// Platform-specific view internals
typedef struct PuglInternalsImpl PuglInternals;

/// View hints
typedef int PuglHints[PUGL_NUM_VIEW_HINTS];

/// Blob of arbitrary data
typedef struct {
  void*  data; ///< Dynamically allocated data
  size_t len;  ///< Length of data in bytes
} PuglBlob;

/// Cross-platform view definition
struct PuglViewImpl {
  PuglWorld*         world;
  const PuglBackend* backend;
  PuglInternals*     impl;
  PuglHandle         handle;
  PuglEventFunc      eventFunc;
  char*              title;
  PuglBlob           clipboard;
  PuglNativeView     parent;
  uintptr_t          transientParent;
  PuglRect           frame;
  PuglConfigureEvent lastConfigure;
  PuglHints          hints;
  int                defaultWidth;
  int                defaultHeight;
  int                minWidth;
  int                minHeight;
  int                maxWidth;
  int                maxHeight;
  int                minAspectX;
  int                minAspectY;
  int                maxAspectX;
  int                maxAspectY;
  bool               visible;
};

/// Cross-platform world definition
struct PuglWorldImpl {
  PuglWorldInternals* impl;
  PuglWorldHandle     handle;
  char*               className;
  double              startTime;
  size_t              numViews;
  PuglView**          views;
};

/// Opaque surface used by graphics backend
typedef void PuglSurface;

/// Graphics backend interface
struct PuglBackendImpl {
  /// Get visual information from display and setup view as necessary
  PuglStatus (*configure)(PuglView*);

  /// Create surface and drawing context
  PuglStatus (*create)(PuglView*);

  /// Destroy surface and drawing context
  PuglStatus (*destroy)(PuglView*);

  /// Enter drawing context, for drawing if expose is non-null
  PuglStatus (*enter)(PuglView*, const PuglExposeEvent*);

  /// Leave drawing context, after drawing if expose is non-null
  PuglStatus (*leave)(PuglView*, const PuglExposeEvent*);

  /// Return the puglGetContext() handle for the application, if any
  void* (*getContext)(PuglView*);
};

#endif // PUGL_DETAIL_TYPES_H