Milestone 5: deliver embedded RDP sessions and lifecycle hardening

third_party/FreeRDP/libfreerdp/cache/nine_grid.c

@@ -0,0 +1,130 @@
+/**
+ * FreeRDP: A Remote Desktop Protocol Implementation
+ * NineGrid Cache
+ *
+ * Copyright 2012 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 <freerdp/update.h>
+#include <freerdp/freerdp.h>
+#include <winpr/stream.h>
+
+#include "nine_grid.h"
+#include "cache.h"
+
+typedef struct
+{
+	void* entry;
+} NINE_GRID_ENTRY;
+
+struct rdp_nine_grid_cache
+{
+	pDrawNineGrid DrawNineGrid;           /* 0 */
+	pMultiDrawNineGrid MultiDrawNineGrid; /* 1 */
+	UINT32 paddingA[16 - 2];              /* 2 */
+
+	UINT32 maxEntries;        /* 16 */
+	UINT32 maxSize;           /* 17 */
+	NINE_GRID_ENTRY* entries; /* 18 */
+	UINT32 paddingB[32 - 19]; /* 19 */
+
+	rdpContext* context;
+};
+
+static BOOL update_gdi_draw_nine_grid(rdpContext* context,
+                                      const DRAW_NINE_GRID_ORDER* draw_nine_grid)
+{
+	rdpCache* cache = context->cache;
+	return IFCALLRESULT(TRUE, cache->nine_grid->DrawNineGrid, context, draw_nine_grid);
+}
+
+static BOOL update_gdi_multi_draw_nine_grid(rdpContext* context,
+                                            const MULTI_DRAW_NINE_GRID_ORDER* multi_draw_nine_grid)
+{
+	rdpCache* cache = context->cache;
+	return IFCALLRESULT(TRUE, cache->nine_grid->MultiDrawNineGrid, context, multi_draw_nine_grid);
+}
+
+void nine_grid_cache_register_callbacks(rdpUpdate* update)
+{
+	rdpCache* cache = update->context->cache;
+
+	cache->nine_grid->DrawNineGrid = update->primary->DrawNineGrid;
+	cache->nine_grid->MultiDrawNineGrid = update->primary->MultiDrawNineGrid;
+
+	update->primary->DrawNineGrid = update_gdi_draw_nine_grid;
+	update->primary->MultiDrawNineGrid = update_gdi_multi_draw_nine_grid;
+}
+
+rdpNineGridCache* nine_grid_cache_new(rdpContext* context)
+{
+	rdpNineGridCache* nine_grid = nullptr;
+	rdpSettings* settings = nullptr;
+
+	WINPR_ASSERT(context);
+
+	settings = context->settings;
+	WINPR_ASSERT(settings);
+
+	nine_grid = (rdpNineGridCache*)calloc(1, sizeof(rdpNineGridCache));
+	if (!nine_grid)
+		return nullptr;
+
+	nine_grid->context = context;
+
+	nine_grid->maxSize = 2560;
+	nine_grid->maxEntries = 256;
+
+	if (!freerdp_settings_set_uint32(settings, FreeRDP_DrawNineGridCacheSize, nine_grid->maxSize))
+		goto fail;
+	if (!freerdp_settings_set_uint32(settings, FreeRDP_DrawNineGridCacheEntries,
+	                                 nine_grid->maxEntries))
+		goto fail;
+
+	nine_grid->entries = (NINE_GRID_ENTRY*)calloc(nine_grid->maxEntries, sizeof(NINE_GRID_ENTRY));
+	if (!nine_grid->entries)
+		goto fail;
+
+	return nine_grid;
+
+fail:
+	WINPR_PRAGMA_DIAG_PUSH
+	WINPR_PRAGMA_DIAG_IGNORED_MISMATCHED_DEALLOC
+	nine_grid_cache_free(nine_grid);
+	WINPR_PRAGMA_DIAG_POP
+	return nullptr;
+}
+
+void nine_grid_cache_free(rdpNineGridCache* nine_grid)
+{
+	if (nine_grid != nullptr)
+	{
+		if (nine_grid->entries != nullptr)
+		{
+			for (size_t i = 0; i < nine_grid->maxEntries; i++)
+				free(nine_grid->entries[i].entry);
+
+			free(nine_grid->entries);
+		}
+
+		free(nine_grid);
+	}
+}