122 lines
3.1 KiB
C
122 lines
3.1 KiB
C
/* FreeRDP: A Remote Desktop Protocol Client
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* YCoCg<->RGB Color conversion operations.
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* vi:ts=4 sw=4:
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*
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* (c) Copyright 2014 Hewlett-Packard Development Company, L.P.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <freerdp/types.h>
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#include <freerdp/primitives.h>
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#include "prim_internal.h"
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#include "prim_YCoCg.h"
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#ifndef MINMAX
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#define MINMAX(_v_, _l_, _h_) \
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((_v_) < (_l_) ? (_l_) : ((_v_) > (_h_) ? (_h_) : (_v_)))
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#endif /* !MINMAX */
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/* ------------------------------------------------------------------------- */
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pstatus_t general_YCoCgRToRGB_8u_AC4R(
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const BYTE *pSrc, INT32 srcStep,
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BYTE *pDst, INT32 dstStep,
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UINT32 width, UINT32 height,
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UINT8 shift,
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BOOL withAlpha,
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BOOL invert)
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{
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const BYTE *sptr = pSrc;
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BYTE *dptr = pDst;
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int cll = shift - 1; /* -1 builds in the /2's */
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int x,y;
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int srcRowBump = srcStep - width*sizeof(UINT32);
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int dstRowBump = dstStep - width*sizeof(UINT32);
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if (invert)
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{
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for (y=0; y<height; y++)
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{
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for (x=0; x<width; x++)
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{
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INT16 cg, co, y, t, r, g, b;
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BYTE a;
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/* Note: shifts must be done before sign-conversion. */
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cg = (INT16) ((INT8) ((*sptr++) << cll));
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co = (INT16) ((INT8) ((*sptr++) << cll));
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y = (INT16) (*sptr++); /* UINT8->INT16 */
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a = *sptr++;
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if (!withAlpha) a = 0xFFU;
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t = y - cg;
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r = t + co;
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g = y + cg;
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b = t - co;
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*dptr++ = (BYTE) MINMAX(r, 0, 255);
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*dptr++ = (BYTE) MINMAX(g, 0, 255);
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*dptr++ = (BYTE) MINMAX(b, 0, 255);
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*dptr++ = a;
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}
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sptr += srcRowBump;
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dptr += dstRowBump;
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}
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}
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else
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{
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for (y=0; y<height; y++)
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{
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for (x=0; x<width; x++)
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{
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INT16 cg, co, y, t, r, g, b;
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BYTE a;
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/* Note: shifts must be done before sign-conversion. */
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cg = (INT16) ((INT8) ((*sptr++) << cll));
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co = (INT16) ((INT8) ((*sptr++) << cll));
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y = (INT16) (*sptr++); /* UINT8->INT16 */
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a = *sptr++;
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if (!withAlpha) a = 0xFFU;
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t = y - cg;
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r = t + co;
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g = y + cg;
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b = t - co;
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*dptr++ = (BYTE) MINMAX(b, 0, 255);
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*dptr++ = (BYTE) MINMAX(g, 0, 255);
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*dptr++ = (BYTE) MINMAX(r, 0, 255);
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*dptr++ = a;
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}
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sptr += srcRowBump;
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dptr += dstRowBump;
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}
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}
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return PRIMITIVES_SUCCESS;
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}
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/* ------------------------------------------------------------------------- */
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void primitives_init_YCoCg(primitives_t* prims)
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{
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prims->YCoCgRToRGB_8u_AC4R = general_YCoCgRToRGB_8u_AC4R;
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primitives_init_YCoCg_opt(prims);
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}
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/* ------------------------------------------------------------------------- */
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void primitives_deinit_YCoCg(primitives_t* prims)
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{
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/* Nothing to do. */
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}
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