/**

 * FreeRDP: A Remote Desktop Protocol Implementation

 * Glyph Cache

 *

 * Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <freerdp/config.h>

#include <stdio.h>

#include <winpr/crt.h>

#include <winpr/assert.h>

#include <winpr/stream.h>

#include <freerdp/log.h>

#include "pointer.h"

#include "cache.h"

#define TAG FREERDP_TAG("cache.pointer")

WINPR_ATTR_NODISCARD

static const char* pointerType(bool colorCache)

{

  return colorCache ? "ColorPointerCache" : "PointerCache";

}

WINPR_ATTR_NODISCARD

static BOOL pointer_cache_put(rdpPointerCache* pointer_cache, UINT32 index, rdpPointer* pointer,

                              BOOL colorCache);

WINPR_ATTR_NODISCARD

static rdpPointer* pointer_cache_get(rdpPointerCache* pointer_cache, UINT32 index);

static void pointer_clear(rdpPointer* pointer)

{

  if (pointer)

  {

    pointer->lengthAndMask = 0;

    free(pointer->andMaskData);

    pointer->andMaskData = nullptr;

    pointer->lengthXorMask = 0;

    free(pointer->xorMaskData);

    pointer->xorMaskData = nullptr;

  }

}

static void pointer_free(rdpContext* context, rdpPointer* pointer)

{

  if (pointer)

  {

    IFCALL(pointer->Free, context, pointer);

    pointer_clear(pointer);

  }

  free(pointer);

}

WINPR_ATTR_NODISCARD

static BOOL update_pointer_position(rdpContext* context,

                                    const POINTER_POSITION_UPDATE* pointer_position)

{

  if (!context || !context->graphics || !context->graphics->Pointer_Prototype ||

      !pointer_position)

    return FALSE;

  const BOOL GrabMouse = freerdp_settings_get_bool(context->settings, FreeRDP_GrabMouse);

  if (!GrabMouse)

    return TRUE;

  const rdpPointer* pointer = context->graphics->Pointer_Prototype;

  WINPR_ASSERT(pointer);

  return IFCALLRESULT(TRUE, pointer->SetPosition, context, pointer_position->xPos,

                      pointer_position->yPos);

}

WINPR_ATTR_NODISCARD

static BOOL update_pointer_system(rdpContext* context, const POINTER_SYSTEM_UPDATE* pointer_system)

{

  if (!context || !context->graphics || !context->graphics->Pointer_Prototype || !pointer_system)

    return FALSE;

  rdpPointer* pointer = context->graphics->Pointer_Prototype;

  switch (pointer_system->type)

  {

    case SYSPTR_NULL:

      return IFCALLRESULT(TRUE, pointer->SetNull, context);

    case SYSPTR_DEFAULT:

      return IFCALLRESULT(TRUE, pointer->SetDefault, context);

    default:

      WLog_ERR(TAG, "Unknown system pointer type (0x%08" PRIX32 ")", pointer_system->type);

  }

  return TRUE;

}

WINPR_ATTR_NODISCARD

static BOOL update_pointer_copy_andxor(rdpPointer* pointer, const BYTE* andMaskData,

                                       size_t lengthAndMask, const BYTE* xorMaskData,

                                       size_t lengthXorMask)

{

  WINPR_ASSERT(pointer);

  pointer_clear(pointer);

  if (lengthAndMask && andMaskData)

  {

    if (lengthAndMask > UINT32_MAX)

      return FALSE;

    pointer->lengthAndMask = (UINT32)lengthAndMask;

    pointer->andMaskData = (BYTE*)malloc(lengthAndMask);

    if (!pointer->andMaskData)

      return FALSE;

    CopyMemory(pointer->andMaskData, andMaskData, lengthAndMask);

  }

  if (lengthXorMask && xorMaskData)

  {

    if (lengthXorMask > UINT32_MAX)

      return FALSE;

    pointer->lengthXorMask = (UINT32)lengthXorMask;

    pointer->xorMaskData = (BYTE*)malloc(lengthXorMask);

    if (!pointer->xorMaskData)

      return FALSE;

    CopyMemory(pointer->xorMaskData, xorMaskData, lengthXorMask);

  }

  return TRUE;

}

WINPR_ATTR_NODISCARD

static BOOL update_pointer_color(rdpContext* context, const POINTER_COLOR_UPDATE* pointer_color)

{

  WINPR_ASSERT(context);

  WINPR_ASSERT(pointer_color);

  rdpCache* cache = context->cache;

  WINPR_ASSERT(cache);

  rdpPointer* pointer = Pointer_Alloc(context);

  if (pointer == nullptr)

    return FALSE;

  pointer->xorBpp = 24;

  pointer->xPos = pointer_color->hotSpotX;

  pointer->yPos = pointer_color->hotSpotY;

  pointer->width = pointer_color->width;

  pointer->height = pointer_color->height;

  if (!update_pointer_copy_andxor(pointer, pointer_color->andMaskData,

                                  pointer_color->lengthAndMask, pointer_color->xorMaskData,

                                  pointer_color->lengthXorMask))

    goto out_fail;

  if (!IFCALLRESULT(TRUE, pointer->New, context, pointer))

    goto out_fail;

  if (!pointer_cache_put(cache->pointer, pointer_color->cacheIndex, pointer, TRUE))

    goto out_fail;

  return IFCALLRESULT(TRUE, pointer->Set, context, pointer);

out_fail:

  pointer_free(context, pointer);

  return FALSE;

}

WINPR_ATTR_NODISCARD

static BOOL update_pointer_large(rdpContext* context, const POINTER_LARGE_UPDATE* pointer_large)

{

  WINPR_ASSERT(context);

  WINPR_ASSERT(pointer_large);

  rdpCache* cache = context->cache;

  WINPR_ASSERT(cache);

  rdpPointer* pointer = Pointer_Alloc(context);

  if (pointer == nullptr)

    return FALSE;

  pointer->xorBpp = pointer_large->xorBpp;

  pointer->xPos = pointer_large->hotSpotX;

  pointer->yPos = pointer_large->hotSpotY;

  pointer->width = pointer_large->width;

  pointer->height = pointer_large->height;

  if (!update_pointer_copy_andxor(pointer, pointer_large->andMaskData,

                                  pointer_large->lengthAndMask, pointer_large->xorMaskData,

                                  pointer_large->lengthXorMask))

    goto out_fail;

  if (!IFCALLRESULT(TRUE, pointer->New, context, pointer))

    goto out_fail;

  if (!pointer_cache_put(cache->pointer, pointer_large->cacheIndex, pointer, FALSE))

    goto out_fail;

  return IFCALLRESULT(TRUE, pointer->Set, context, pointer);

out_fail:

  pointer_free(context, pointer);

  return FALSE;

}

WINPR_ATTR_NODISCARD

static BOOL update_pointer_new(rdpContext* context, const POINTER_NEW_UPDATE* pointer_new)

{

  if (!context || !pointer_new)

    return FALSE;

  rdpCache* cache = context->cache;

  rdpPointer* pointer = Pointer_Alloc(context);

  if (!pointer)

    return FALSE;

  pointer->xorBpp = pointer_new->xorBpp;

  pointer->xPos = pointer_new->colorPtrAttr.hotSpotX;

  pointer->yPos = pointer_new->colorPtrAttr.hotSpotY;

  pointer->width = pointer_new->colorPtrAttr.width;

  pointer->height = pointer_new->colorPtrAttr.height;

  if (!update_pointer_copy_andxor(

          pointer, pointer_new->colorPtrAttr.andMaskData, pointer_new->colorPtrAttr.lengthAndMask,

          pointer_new->colorPtrAttr.xorMaskData, pointer_new->colorPtrAttr.lengthXorMask))

    goto out_fail;

  if (!IFCALLRESULT(TRUE, pointer->New, context, pointer))

    goto out_fail;

  if (!pointer_cache_put(cache->pointer, pointer_new->colorPtrAttr.cacheIndex, pointer, FALSE))

    goto out_fail;

  return IFCALLRESULT(TRUE, pointer->Set, context, pointer);

out_fail:

  pointer_free(context, pointer);

  return FALSE;

}

WINPR_ATTR_NODISCARD

static BOOL update_pointer_cached(rdpContext* context, const POINTER_CACHED_UPDATE* pointer_cached)

{

  WINPR_ASSERT(context);

  WINPR_ASSERT(pointer_cached);

  rdpCache* cache = context->cache;

  WINPR_ASSERT(cache);

  rdpPointer* pointer = pointer_cache_get(cache->pointer, pointer_cached->cacheIndex);

  if (pointer != nullptr)

    return IFCALLRESULT(TRUE, pointer->Set, context, pointer);

  return FALSE;

}

rdpPointer* pointer_cache_get(rdpPointerCache* pointer_cache, UINT32 index)

{

  WINPR_ASSERT(pointer_cache);

  if (index >= pointer_cache->cacheSize)

  {

    WLog_ERR(TAG, "invalid pointer index:%" PRIu32 " [%" PRIu32 "]", index,

             pointer_cache->cacheSize);

    return nullptr;

  }

  WINPR_ASSERT(pointer_cache->entries);

  return pointer_cache->entries[index];

}

BOOL pointer_cache_put(rdpPointerCache* pointer_cache, UINT32 index, rdpPointer* pointer,

                       BOOL colorCache)

{

  const FreeRDP_Settings_Keys_UInt32 id =

      colorCache ? FreeRDP_ColorPointerCacheSize : FreeRDP_PointerCacheSize;

  WINPR_ASSERT(pointer_cache);

  WINPR_ASSERT(pointer_cache->context);

  const UINT32 size = freerdp_settings_get_uint32(pointer_cache->context->settings, id);

  WLog_DBG(TAG, "[%s] pointer index:%" PRIu32 " [allocated %" PRIu32 ", size %" PRIu32 "]",

           pointerType(colorCache), index, pointer_cache->cacheSize, size);

  if (index >= pointer_cache->cacheSize)

  {

    WLog_ERR(TAG,

             "[%s] invalid pointer index:%" PRIu32 " [allocated %" PRIu32 ", size %" PRIu32 "]",

             pointerType(colorCache), index, pointer_cache->cacheSize, size);

    return FALSE;

  }

  if (index >= size)

  {

    WLog_WARN(TAG,

              "[%s] suspicious pointer index:%" PRIu32 " [allocated %" PRIu32 ", size %" PRIu32

              "]",

              pointerType(colorCache), index, pointer_cache->cacheSize, size);

  }

  WINPR_ASSERT(pointer_cache->entries);

  rdpPointer* prevPointer = pointer_cache->entries[index];

  pointer_free(pointer_cache->context, prevPointer);

  pointer_cache->entries[index] = pointer;

  return TRUE;

}

void pointer_cache_register_callbacks(rdpUpdate* update)

{

  rdpPointerUpdate* pointer = nullptr;

  WINPR_ASSERT(update);

  WINPR_ASSERT(update->context);

  pointer = update->pointer;

  WINPR_ASSERT(pointer);

  if (!freerdp_settings_get_bool(update->context->settings, FreeRDP_DeactivateClientDecoding))

  {

    pointer->PointerPosition = update_pointer_position;

    pointer->PointerSystem = update_pointer_system;

    pointer->PointerColor = update_pointer_color;

    pointer->PointerLarge = update_pointer_large;

    pointer->PointerNew = update_pointer_new;

    pointer->PointerCached = update_pointer_cached;

  }

}

BOOL pointer_cache_resize(rdpPointerCache* pointerCache)

{

  WINPR_ASSERT(pointerCache);

  rdpContext* context = pointerCache->context;

  WINPR_ASSERT(context);

  rdpSettings* settings = context->settings;

  WINPR_ASSERT(settings);

  /* seen invalid pointer cache requests by mstsc (off by 1) so we ensure the cache entry size

   * matches */

  const UINT32 size = freerdp_settings_get_uint32(settings, FreeRDP_PointerCacheSize);

  const UINT32 colorSize = freerdp_settings_get_uint32(settings, FreeRDP_ColorPointerCacheSize);

  const UINT32 cacheSize = MAX(size, colorSize) + 1;

  if (cacheSize > SIZE_MAX / sizeof(rdpPointer*))

    return FALSE;

  WLog_DBG(TAG,

           "setting cacheSize=%" PRIu32 "[ColorPointerCache=%" PRIu32 ", PointerCache=%" PRIu32

           "]",

           cacheSize, colorSize, size);

  /* Reset pointer to default before deleting the cache.

   */

  if (pointerCache->context && pointerCache->context->graphics)

  {

    rdpPointer* pointer = pointerCache->context->graphics->Pointer_Prototype;

    if (pointer && pointer->SetDefault)

      (void)pointer->SetDefault(pointerCache->context);

  }

  for (size_t i = cacheSize; i < pointerCache->cacheSize; i++)

  {

    rdpPointer* pointer = pointerCache->entries[i];

    pointer_free(pointerCache->context, pointer);

  }

  void* tmp = realloc(pointerCache->entries, cacheSize * sizeof(rdpPointer*));

  if (!tmp)

    return FALSE;

  pointerCache->entries = (rdpPointer**)tmp;

  if (cacheSize > pointerCache->cacheSize)

  {

    const size_t rsize = (cacheSize - pointerCache->cacheSize) * sizeof(rdpPointer*);

    memset(&pointerCache->entries[pointerCache->cacheSize], 0, rsize);

  }

  pointerCache->cacheSize = cacheSize;

  return TRUE;

}

rdpPointerCache* pointer_cache_new(rdpContext* context)

{

  WINPR_ASSERT(context);

  rdpSettings* settings = context->settings;

  WINPR_ASSERT(settings);

  rdpPointerCache* pointer_cache = (rdpPointerCache*)calloc(1, sizeof(rdpPointerCache));

  if (!pointer_cache)

    return nullptr;

  pointer_cache->context = context;

  if (!pointer_cache_resize(pointer_cache))

  {

    free(pointer_cache);

    return nullptr;

  }

  return pointer_cache;

}

void pointer_cache_free(rdpPointerCache* pointer_cache)

{

  if (pointer_cache != nullptr)

  {

    /* Reset pointer to default before deleting the cache.

     */

    if (pointer_cache->context && pointer_cache->context->graphics)

    {

      rdpPointer* pointer = pointer_cache->context->graphics->Pointer_Prototype;

      if (pointer && pointer->SetDefault)

        (void)pointer->SetDefault(pointer_cache->context);

    }

    if (pointer_cache->entries)

    {

      for (UINT32 i = 0; i < pointer_cache->cacheSize; i++)

      {

        rdpPointer* pointer = pointer_cache->entries[i];

        pointer_free(pointer_cache->context, pointer);

      }

    }

    free((void*)pointer_cache->entries);

    free(pointer_cache);

  }

}

POINTER_COLOR_UPDATE* copy_pointer_color_update(rdpContext* context,

                                                const POINTER_COLOR_UPDATE* pointer)

{

  POINTER_COLOR_UPDATE* dst = calloc(1, sizeof(POINTER_COLOR_UPDATE));

  if (!dst || !pointer)

    goto fail;

  *dst = *pointer;

  if (pointer->lengthAndMask > 0)

  {

    dst->andMaskData = calloc(pointer->lengthAndMask, sizeof(BYTE));

    if (!dst->andMaskData)

      goto fail;

    memcpy(dst->andMaskData, pointer->andMaskData, pointer->lengthAndMask);

  }

  if (pointer->lengthXorMask > 0)

  {

    dst->xorMaskData = calloc(pointer->lengthXorMask, sizeof(BYTE));

    if (!dst->xorMaskData)

      goto fail;

    memcpy(dst->xorMaskData, pointer->xorMaskData, pointer->lengthXorMask);

  }

  return dst;

fail:

  free_pointer_color_update(context, dst);

  return nullptr;

}

void free_pointer_color_update(rdpContext* context, POINTER_COLOR_UPDATE* pointer)

{

  WINPR_UNUSED(context);

  if (!pointer)

    return;

  free(pointer->xorMaskData);

  free(pointer->andMaskData);

  free(pointer);

}

POINTER_LARGE_UPDATE* copy_pointer_large_update(rdpContext* context,

                                                const POINTER_LARGE_UPDATE* pointer)

{

  POINTER_LARGE_UPDATE* dst = calloc(1, sizeof(POINTER_LARGE_UPDATE));

  if (!dst || !pointer)

    goto fail;

  *dst = *pointer;

  if (pointer->lengthAndMask > 0)

  {

    dst->andMaskData = calloc(pointer->lengthAndMask, sizeof(BYTE));

    if (!dst->andMaskData)

      goto fail;

    memcpy(dst->andMaskData, pointer->andMaskData, pointer->lengthAndMask);

  }

  if (pointer->lengthXorMask > 0)

  {

    dst->xorMaskData = calloc(pointer->lengthXorMask, sizeof(BYTE));

    if (!dst->xorMaskData)

      goto fail;

    memcpy(dst->xorMaskData, pointer->xorMaskData, pointer->lengthXorMask);

  }

  return dst;

fail:

  free_pointer_large_update(context, dst);

  return nullptr;

}

void free_pointer_large_update(rdpContext* context, POINTER_LARGE_UPDATE* pointer)

{

  WINPR_UNUSED(context);

  if (!pointer)

    return;

  free(pointer->xorMaskData);

  free(pointer->andMaskData);

  free(pointer);

}

POINTER_NEW_UPDATE* copy_pointer_new_update(rdpContext* context, const POINTER_NEW_UPDATE* pointer)

{

  POINTER_NEW_UPDATE* dst = calloc(1, sizeof(POINTER_NEW_UPDATE));

  if (!dst || !pointer)

    goto fail;

  *dst = *pointer;

  if (pointer->colorPtrAttr.lengthAndMask > 0)

  {

    dst->colorPtrAttr.andMaskData = calloc(pointer->colorPtrAttr.lengthAndMask, sizeof(BYTE));

    if (!dst->colorPtrAttr.andMaskData)

      goto fail;

    memcpy(dst->colorPtrAttr.andMaskData, pointer->colorPtrAttr.andMaskData,

           pointer->colorPtrAttr.lengthAndMask);

  }

  if (pointer->colorPtrAttr.lengthXorMask > 0)

  {

    dst->colorPtrAttr.xorMaskData = calloc(pointer->colorPtrAttr.lengthXorMask, sizeof(BYTE));

    if (!dst->colorPtrAttr.xorMaskData)

      goto fail;

    memcpy(dst->colorPtrAttr.xorMaskData, pointer->colorPtrAttr.xorMaskData,

           pointer->colorPtrAttr.lengthXorMask);

  }

  return dst;

fail:

  free_pointer_new_update(context, dst);

  return nullptr;

}

void free_pointer_new_update(WINPR_ATTR_UNUSED rdpContext* context, POINTER_NEW_UPDATE* pointer)

{

  if (!pointer)

    return;

  free(pointer->colorPtrAttr.xorMaskData);

  free(pointer->colorPtrAttr.andMaskData);

  free(pointer);

}

POINTER_CACHED_UPDATE* copy_pointer_cached_update(rdpContext* context,

                                                  const POINTER_CACHED_UPDATE* pointer)

{

  POINTER_CACHED_UPDATE* dst = calloc(1, sizeof(POINTER_CACHED_UPDATE));

  if (!dst)

    goto fail;

  *dst = *pointer;

  return dst;

fail:

  free_pointer_cached_update(context, dst);

  return nullptr;

}

void free_pointer_cached_update(rdpContext* context, POINTER_CACHED_UPDATE* pointer)

{

  WINPR_UNUSED(context);

  free(pointer);

}

void free_pointer_position_update(rdpContext* context, POINTER_POSITION_UPDATE* pointer)

{

  WINPR_UNUSED(context);

  free(pointer);

}

POINTER_POSITION_UPDATE* copy_pointer_position_update(rdpContext* context,

                                                      const POINTER_POSITION_UPDATE* pointer)

{

  POINTER_POSITION_UPDATE* dst = calloc(1, sizeof(POINTER_POSITION_UPDATE));

  if (!dst || !pointer)

    goto fail;

  *dst = *pointer;

  return dst;

fail:

  free_pointer_position_update(context, dst);

  return nullptr;

}

void free_pointer_system_update(rdpContext* context, POINTER_SYSTEM_UPDATE* pointer)

{

  WINPR_UNUSED(context);

  free(pointer);

}

POINTER_SYSTEM_UPDATE* copy_pointer_system_update(rdpContext* context,

                                                  const POINTER_SYSTEM_UPDATE* pointer)

{

  POINTER_SYSTEM_UPDATE* dst = calloc(1, sizeof(POINTER_SYSTEM_UPDATE));

  if (!dst || !pointer)

    goto fail;

  *dst = *pointer;

  return dst;

fail:

  free_pointer_system_update(context, dst);

  return nullptr;

}