Archipelago » qemu

/*

 * QEMU Cirrus CLGD 54xx VGA Emulator.

 * 

 * Copyright (c) 2004 Fabrice Bellard

 * 

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#if DEPTH == 8

#define PUTPIXEL()    ROP_OP(d[0], col)

#elif DEPTH == 16

#define PUTPIXEL()    ROP_OP(((uint16_t *)d)[0], col);

#elif DEPTH == 24

#define PUTPIXEL()    ROP_OP(d[0], col); \

                      ROP_OP(d[1], (col >> 8)); \

                      ROP_OP(d[2], (col >> 16))

#elif DEPTH == 32

#define PUTPIXEL()    ROP_OP(((uint32_t *)d)[0], col)

#else

#error unsupported DEPTH

#endif                

static void

glue(glue(glue(cirrus_colorexpand_transp_, ROP_NAME), _),DEPTH)

     (CirrusVGAState * s, uint8_t * dst,

      const uint8_t * src1, 

      int dstpitch, int srcpitch, 

      int bltwidth, int bltheight)

{

    const uint8_t *src;

    uint8_t *d;

    int x, y;

    unsigned bits;

    unsigned int col;

    unsigned bitmask;

    unsigned index;

    int srcskipleft = 0;

    col = s->cirrus_blt_fgcol;

    for(y = 0; y < bltheight; y++) {

        src = src1;

        bitmask = 0x80 >> srcskipleft;

        bits = *src++;

        d = dst;

        for (x = 0; x < bltwidth; x += (DEPTH / 8)) {

            if ((bitmask & 0xff) == 0) {

                bitmask = 0x80;

                bits = *src++;

            }

            index = (bits & bitmask);

            if (index) {

                PUTPIXEL();

            }

            d += (DEPTH / 8);

            bitmask >>= 1;

        }

        src1 += srcpitch;

        dst += dstpitch;

    }

}

static void

glue(glue(glue(cirrus_colorexpand_, ROP_NAME), _),DEPTH)

     (CirrusVGAState * s, uint8_t * dst,

      const uint8_t * src1, 

      int dstpitch, int srcpitch, 

      int bltwidth, int bltheight)

{

    const uint8_t *src;

    uint32_t colors[2];

    uint8_t *d;

    int x, y;

    unsigned bits;

    unsigned int col;

    unsigned bitmask;

    int srcskipleft = 0;

    colors[0] = s->cirrus_blt_bgcol;

    colors[1] = s->cirrus_blt_fgcol;

    for(y = 0; y < bltheight; y++) {

        src = src1;

        bitmask = 0x80 >> srcskipleft;

        bits = *src++;

        d = dst;

        for (x = 0; x < bltwidth; x += (DEPTH / 8)) {

            if ((bitmask & 0xff) == 0) {

                bitmask = 0x80;

                bits = *src++;

            }

            col = colors[!!(bits & bitmask)];

            PUTPIXEL();

            d += (DEPTH / 8);

            bitmask >>= 1;

        }

        src1 += srcpitch;

        dst += dstpitch;

    }

}

static void 

glue(glue(glue(cirrus_fill_, ROP_NAME), _),DEPTH)

     (CirrusVGAState *s,

      uint8_t *dst, int dst_pitch, 

      int width, int height)

{

    uint8_t *d, *d1;

    uint32_t col;

    int x, y;

    col = s->cirrus_blt_fgcol;

    d1 = dst;

    for(y = 0; y < height; y++) {

        d = d1;

        for(x = 0; x < width; x += (DEPTH / 8)) {

            PUTPIXEL();

            d += (DEPTH / 8);

        }

        d1 += dst_pitch;

    }

}

#undef DEPTH

#undef PUTPIXEL