FreeRDP/libfreerdp-cache/offscreen.c

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/**
* FreeRDP: A Remote Desktop Protocol Client
* Offscreen Bitmap 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/utils/stream.h>
#include <freerdp/utils/memory.h>
#include <freerdp/cache/offscreen.h>
void update_gdi_create_offscreen_bitmap(rdpUpdate* update, CREATE_OFFSCREEN_BITMAP_ORDER* create_offscreen_bitmap)
{
rdpBitmap* bitmap;
rdpBitmap* prevBitmap;
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rdpCache* cache = update->context->cache;
bitmap = Bitmap_Alloc(update->context);
bitmap->width = create_offscreen_bitmap->cx;
bitmap->height = create_offscreen_bitmap->cy;
bitmap->New(update->context, bitmap);
prevBitmap = offscreen_cache_get(cache->offscreen, create_offscreen_bitmap->id);
if (prevBitmap != NULL)
Bitmap_Free(update->context, prevBitmap);
offscreen_cache_put(cache->offscreen, create_offscreen_bitmap->id, bitmap);
if(cache->offscreen->currentSurface == create_offscreen_bitmap->id)
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Bitmap_SetSurface(update->context, bitmap, False);
}
void update_gdi_switch_surface(rdpUpdate* update, SWITCH_SURFACE_ORDER* switch_surface)
{
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rdpCache* cache = update->context->cache;
if (switch_surface->bitmapId == SCREEN_BITMAP_SURFACE)
{
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Bitmap_SetSurface(update->context, NULL, True);
}
else
{
rdpBitmap* bitmap;
bitmap = offscreen_cache_get(cache->offscreen, switch_surface->bitmapId);
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Bitmap_SetSurface(update->context, bitmap, False);
}
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cache->offscreen->currentSurface = switch_surface->bitmapId;
}
rdpBitmap* offscreen_cache_get(rdpOffscreenCache* offscreen_cache, uint16 index)
{
rdpBitmap* bitmap;
if (index > offscreen_cache->maxEntries)
{
printf("invalid offscreen bitmap index: 0x%04X\n", index);
return NULL;
}
bitmap = offscreen_cache->entries[index];
if (bitmap == NULL)
{
printf("invalid offscreen bitmap at index: 0x%04X\n", index);
return NULL;
}
return bitmap;
}
void offscreen_cache_put(rdpOffscreenCache* offscreen, uint16 index, rdpBitmap* bitmap)
{
if (index > offscreen->maxEntries)
{
printf("invalid offscreen bitmap index: 0x%04X\n", index);
return;
}
offscreen->entries[index] = bitmap;
}
void offscreen_cache_register_callbacks(rdpUpdate* update)
{
update->CreateOffscreenBitmap = update_gdi_create_offscreen_bitmap;
update->SwitchSurface = update_gdi_switch_surface;
}
rdpOffscreenCache* offscreen_cache_new(rdpSettings* settings)
{
rdpOffscreenCache* offscreen_cache;
offscreen_cache = (rdpOffscreenCache*) xzalloc(sizeof(rdpOffscreenCache));
if (offscreen_cache != NULL)
{
offscreen_cache->settings = settings;
offscreen_cache->update = ((freerdp*) settings->instance)->update;
offscreen_cache->currentSurface = SCREEN_BITMAP_SURFACE;
offscreen_cache->maxSize = 7680;
offscreen_cache->maxEntries = 100;
settings->offscreen_bitmap_cache_size = offscreen_cache->maxSize;
settings->offscreen_bitmap_cache_entries = offscreen_cache->maxEntries;
offscreen_cache->entries = (rdpBitmap**) xzalloc(sizeof(rdpBitmap*) * offscreen_cache->maxEntries);
}
return offscreen_cache;
}
void offscreen_cache_free(rdpOffscreenCache* offscreen_cache)
{
int i;
rdpBitmap* bitmap;
if (offscreen_cache != NULL)
{
for (i = 0; i < offscreen_cache->maxEntries; i++)
{
bitmap = offscreen_cache->entries[i];
if (bitmap != NULL)
Bitmap_Free(offscreen_cache->update->context, bitmap);
}
xfree(offscreen_cache->entries);
xfree(offscreen_cache);
}
}