diff options
Diffstat (limited to 'channels/rdpgfx/rdpgfx_common.c')
| -rw-r--r-- | channels/rdpgfx/rdpgfx_common.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/channels/rdpgfx/rdpgfx_common.c b/channels/rdpgfx/rdpgfx_common.c new file mode 100644 index 0000000..775641c --- /dev/null +++ b/channels/rdpgfx/rdpgfx_common.c @@ -0,0 +1,197 @@ +/** + * FreeRDP: A Remote Desktop Protocol Implementation + * Graphics Pipeline Extension + * + * Copyright 2013 Marc-Andre Moreau <marcandre.moreau@gmail.com> + * Copyright 2015 Thincast Technologies GmbH + * Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.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 <winpr/crt.h> +#include <winpr/assert.h> +#include <winpr/stream.h> +#include <freerdp/channels/log.h> + +#define TAG CHANNELS_TAG("rdpgfx.common") + +#include "rdpgfx_common.h" + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +UINT rdpgfx_read_header(wStream* s, RDPGFX_HEADER* header) +{ + WINPR_ASSERT(s); + WINPR_ASSERT(header); + + if (!Stream_CheckAndLogRequiredLength(TAG, s, 8)) + return CHANNEL_RC_NO_MEMORY; + + Stream_Read_UINT16(s, header->cmdId); /* cmdId (2 bytes) */ + Stream_Read_UINT16(s, header->flags); /* flags (2 bytes) */ + Stream_Read_UINT32(s, header->pduLength); /* pduLength (4 bytes) */ + + if (header->pduLength < 8) + { + WLog_ERR(TAG, "header->pduLength %u less than 8!", header->pduLength); + return ERROR_INVALID_DATA; + } + if (!Stream_CheckAndLogRequiredLength(TAG, s, (header->pduLength - 8))) + return ERROR_INVALID_DATA; + + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +UINT rdpgfx_write_header(wStream* s, const RDPGFX_HEADER* header) +{ + WINPR_ASSERT(s); + WINPR_ASSERT(header); + + if (!Stream_EnsureRemainingCapacity(s, 8)) + return CHANNEL_RC_NO_MEMORY; + Stream_Write_UINT16(s, header->cmdId); /* cmdId (2 bytes) */ + Stream_Write_UINT16(s, header->flags); /* flags (2 bytes) */ + Stream_Write_UINT32(s, header->pduLength); /* pduLength (4 bytes) */ + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +UINT rdpgfx_read_point16(wStream* s, RDPGFX_POINT16* pt16) +{ + WINPR_ASSERT(s); + WINPR_ASSERT(pt16); + + if (!Stream_CheckAndLogRequiredLength(TAG, s, 4)) + return ERROR_INVALID_DATA; + + Stream_Read_UINT16(s, pt16->x); /* x (2 bytes) */ + Stream_Read_UINT16(s, pt16->y); /* y (2 bytes) */ + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +UINT rdpgfx_write_point16(wStream* s, const RDPGFX_POINT16* point16) +{ + WINPR_ASSERT(s); + WINPR_ASSERT(point16); + + if (!Stream_EnsureRemainingCapacity(s, 4)) + return CHANNEL_RC_NO_MEMORY; + + Stream_Write_UINT16(s, point16->x); /* x (2 bytes) */ + Stream_Write_UINT16(s, point16->y); /* y (2 bytes) */ + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +UINT rdpgfx_read_rect16(wStream* s, RECTANGLE_16* rect16) +{ + WINPR_ASSERT(s); + WINPR_ASSERT(rect16); + + if (!Stream_CheckAndLogRequiredLength(TAG, s, 8)) + return ERROR_INVALID_DATA; + + Stream_Read_UINT16(s, rect16->left); /* left (2 bytes) */ + Stream_Read_UINT16(s, rect16->top); /* top (2 bytes) */ + Stream_Read_UINT16(s, rect16->right); /* right (2 bytes) */ + Stream_Read_UINT16(s, rect16->bottom); /* bottom (2 bytes) */ + if (rect16->left >= rect16->right) + return ERROR_INVALID_DATA; + if (rect16->top >= rect16->bottom) + return ERROR_INVALID_DATA; + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +UINT rdpgfx_write_rect16(wStream* s, const RECTANGLE_16* rect16) +{ + WINPR_ASSERT(s); + WINPR_ASSERT(rect16); + + if (!Stream_EnsureRemainingCapacity(s, 8)) + return CHANNEL_RC_NO_MEMORY; + + Stream_Write_UINT16(s, rect16->left); /* left (2 bytes) */ + Stream_Write_UINT16(s, rect16->top); /* top (2 bytes) */ + Stream_Write_UINT16(s, rect16->right); /* right (2 bytes) */ + Stream_Write_UINT16(s, rect16->bottom); /* bottom (2 bytes) */ + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +UINT rdpgfx_read_color32(wStream* s, RDPGFX_COLOR32* color32) +{ + WINPR_ASSERT(s); + WINPR_ASSERT(color32); + + if (!Stream_CheckAndLogRequiredLength(TAG, s, 4)) + return ERROR_INVALID_DATA; + + Stream_Read_UINT8(s, color32->B); /* B (1 byte) */ + Stream_Read_UINT8(s, color32->G); /* G (1 byte) */ + Stream_Read_UINT8(s, color32->R); /* R (1 byte) */ + Stream_Read_UINT8(s, color32->XA); /* XA (1 byte) */ + return CHANNEL_RC_OK; +} + +/** + * Function description + * + * @return 0 on success, otherwise a Win32 error code + */ +UINT rdpgfx_write_color32(wStream* s, const RDPGFX_COLOR32* color32) +{ + WINPR_ASSERT(s); + WINPR_ASSERT(color32); + + if (!Stream_EnsureRemainingCapacity(s, 4)) + return CHANNEL_RC_NO_MEMORY; + + Stream_Write_UINT8(s, color32->B); /* B (1 byte) */ + Stream_Write_UINT8(s, color32->G); /* G (1 byte) */ + Stream_Write_UINT8(s, color32->R); /* R (1 byte) */ + Stream_Write_UINT8(s, color32->XA); /* XA (1 byte) */ + return CHANNEL_RC_OK; +} |