Milestone 5: deliver embedded RDP sessions and lifecycle hardening

third_party/FreeRDP/libfreerdp/cache/palette.c

@@ -0,0 +1,121 @@
+/**
+ * FreeRDP: A Remote Desktop Protocol Implementation
+ * Palette (Color Table) 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 <freerdp/log.h>
+
+#include "palette.h"
+#include "cache.h"
+
+#define TAG FREERDP_TAG("cache.palette")
+
+static void palette_cache_put(rdpPaletteCache* palette, UINT32 index, void* entry);
+
+static BOOL update_gdi_cache_color_table(rdpContext* context,
+                                         const CACHE_COLOR_TABLE_ORDER* cacheColorTable)
+{
+	UINT32* colorTable = nullptr;
+	rdpCache* cache = context->cache;
+	colorTable = (UINT32*)malloc(sizeof(UINT32) * 256);
+
+	if (!colorTable)
+		return FALSE;
+
+	CopyMemory(colorTable, cacheColorTable->colorTable, sizeof(UINT32) * 256);
+	palette_cache_put(cache->palette, cacheColorTable->cacheIndex, (void*)colorTable);
+	return TRUE;
+}
+
+void palette_cache_put(rdpPaletteCache* paletteCache, UINT32 index, void* entry)
+{
+	if (index >= paletteCache->maxEntries)
+	{
+		WLog_ERR(TAG, "invalid color table index: 0x%08" PRIX32 "", index);
+		free(entry);
+		return;
+	}
+
+	free(paletteCache->entries[index].entry);
+	paletteCache->entries[index].entry = entry;
+}
+
+void palette_cache_register_callbacks(rdpUpdate* update)
+{
+	WINPR_ASSERT(update);
+	WINPR_ASSERT(update->secondary);
+	update->secondary->CacheColorTable = update_gdi_cache_color_table;
+}
+
+rdpPaletteCache* palette_cache_new(rdpContext* context)
+{
+	rdpPaletteCache* paletteCache = nullptr;
+
+	WINPR_ASSERT(context);
+
+	paletteCache = (rdpPaletteCache*)calloc(1, sizeof(rdpPaletteCache));
+
+	if (paletteCache)
+	{
+		paletteCache->context = context;
+		paletteCache->maxEntries = 6;
+		paletteCache->entries =
+		    (PALETTE_TABLE_ENTRY*)calloc(paletteCache->maxEntries, sizeof(PALETTE_TABLE_ENTRY));
+	}
+
+	return paletteCache;
+}
+
+void palette_cache_free(rdpPaletteCache* paletteCache)
+{
+	if (paletteCache)
+	{
+		for (UINT32 i = 0; i < paletteCache->maxEntries; i++)
+			free(paletteCache->entries[i].entry);
+
+		free(paletteCache->entries);
+		free(paletteCache);
+	}
+}
+
+void free_palette_update(WINPR_ATTR_UNUSED rdpContext* context, PALETTE_UPDATE* pointer)
+{
+	free(pointer);
+}
+
+PALETTE_UPDATE* copy_palette_update(rdpContext* context, const PALETTE_UPDATE* pointer)
+{
+	PALETTE_UPDATE* dst = calloc(1, sizeof(PALETTE_UPDATE));
+
+	if (!dst || !pointer)
+		goto fail;
+
+	*dst = *pointer;
+	return dst;
+fail:
+	WINPR_PRAGMA_DIAG_PUSH
+	WINPR_PRAGMA_DIAG_IGNORED_MISMATCHED_DEALLOC
+	free_palette_update(context, dst);
+	WINPR_PRAGMA_DIAG_POP
+	return nullptr;
+}