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_patternfill_, ROP_NAME), _),DEPTH)

     (CirrusVGAState * s, uint8_t * dst,

      const uint8_t * src,

      int dstpitch, int srcpitch,

      int bltwidth, int bltheight)

{

    uint8_t *d;

    int x, y, pattern_y, pattern_pitch, pattern_x;

    unsigned int col;

    const uint8_t *src1;

#if DEPTH == 24

    int skipleft = s->gr[0x2f] & 0x1f;

#else

    int skipleft = (s->gr[0x2f] & 0x07) * (DEPTH / 8);

#endif

#if DEPTH == 8

    pattern_pitch = 8;

#elif DEPTH == 16

    pattern_pitch = 16;

#else

    pattern_pitch = 32;

#endif

    pattern_y = s->cirrus_blt_srcaddr & 7;

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

        pattern_x = skipleft;

        d = dst + skipleft;

        src1 = src + pattern_y * pattern_pitch;

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

#if DEPTH == 8

            col = src1[pattern_x];

            pattern_x = (pattern_x + 1) & 7;

#elif DEPTH == 16

            col = ((uint16_t *)(src1 + pattern_x))[0];

            pattern_x = (pattern_x + 2) & 15;

#elif DEPTH == 24

            {

                const uint8_t *src2 = src1 + pattern_x * 3;

                col = src2[0] | (src2[1] << 8) | (src2[2] << 16);

                pattern_x = (pattern_x + 1) & 7;

            }

#else

            col = ((uint32_t *)(src1 + pattern_x))[0];

            pattern_x = (pattern_x + 4) & 31;

#endif

            PUTPIXEL();

            d += (DEPTH / 8);

        }

        pattern_y = (pattern_y + 1) & 7;

        dst += dstpitch;

    }

}

/* NOTE: srcpitch is ignored */

static void

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

     (CirrusVGAState * s, uint8_t * dst,

      const uint8_t * src,

      int dstpitch, int srcpitch,

      int bltwidth, int bltheight)

{

    uint8_t *d;

    int x, y;

    unsigned bits, bits_xor;

    unsigned int col;

    unsigned bitmask;

    unsigned index;

#if DEPTH == 24

    int dstskipleft = s->gr[0x2f] & 0x1f;

    int srcskipleft = dstskipleft / 3;

#else

    int srcskipleft = s->gr[0x2f] & 0x07;

    int dstskipleft = srcskipleft * (DEPTH / 8);

#endif

    if (s->cirrus_blt_modeext & CIRRUS_BLTMODEEXT_COLOREXPINV) {

        bits_xor = 0xff;

        col = s->cirrus_blt_bgcol;

    } else {

        bits_xor = 0x00;

        col = s->cirrus_blt_fgcol;

    }

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

        bitmask = 0x80 >> srcskipleft;

        bits = *src++ ^ bits_xor;

        d = dst + dstskipleft;

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

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

                bitmask = 0x80;

                bits = *src++ ^ bits_xor;

            }

            index = (bits & bitmask);

            if (index) {

                PUTPIXEL();

            }

            d += (DEPTH / 8);

            bitmask >>= 1;

        }

        dst += dstpitch;

    }

}

static void

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

     (CirrusVGAState * s, uint8_t * dst,

      const uint8_t * src,

      int dstpitch, int srcpitch,

      int bltwidth, int bltheight)

{

    uint32_t colors[2];

    uint8_t *d;

    int x, y;

    unsigned bits;

    unsigned int col;

    unsigned bitmask;

    int srcskipleft = s->gr[0x2f] & 0x07;

    int dstskipleft = srcskipleft * (DEPTH / 8);

    colors[0] = s->cirrus_blt_bgcol;

    colors[1] = s->cirrus_blt_fgcol;

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

        bitmask = 0x80 >> srcskipleft;

        bits = *src++;

        d = dst + dstskipleft;

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

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

                bitmask = 0x80;

                bits = *src++;

            }

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

            PUTPIXEL();

            d += (DEPTH / 8);

            bitmask >>= 1;

        }

        dst += dstpitch;

    }

}

static void

glue(glue(glue(cirrus_colorexpand_pattern_transp_, ROP_NAME), _),DEPTH)

     (CirrusVGAState * s, uint8_t * dst,

      const uint8_t * src,

      int dstpitch, int srcpitch,

      int bltwidth, int bltheight)

{

    uint8_t *d;

    int x, y, bitpos, pattern_y;

    unsigned int bits, bits_xor;

    unsigned int col;

#if DEPTH == 24

    int dstskipleft = s->gr[0x2f] & 0x1f;

    int srcskipleft = dstskipleft / 3;

#else

    int srcskipleft = s->gr[0x2f] & 0x07;

    int dstskipleft = srcskipleft * (DEPTH / 8);

#endif

    if (s->cirrus_blt_modeext & CIRRUS_BLTMODEEXT_COLOREXPINV) {

        bits_xor = 0xff;

        col = s->cirrus_blt_bgcol;

    } else {

        bits_xor = 0x00;

        col = s->cirrus_blt_fgcol;

    }

    pattern_y = s->cirrus_blt_srcaddr & 7;

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

        bits = src[pattern_y] ^ bits_xor;

        bitpos = 7 - srcskipleft;

        d = dst + dstskipleft;

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

            if ((bits >> bitpos) & 1) {

                PUTPIXEL();

            }

            d += (DEPTH / 8);

            bitpos = (bitpos - 1) & 7;

        }

        pattern_y = (pattern_y + 1) & 7;

        dst += dstpitch;

    }

}

static void

glue(glue(glue(cirrus_colorexpand_pattern_, ROP_NAME), _),DEPTH)

     (CirrusVGAState * s, uint8_t * dst,

      const uint8_t * src,

      int dstpitch, int srcpitch,

      int bltwidth, int bltheight)

{

    uint32_t colors[2];

    uint8_t *d;

    int x, y, bitpos, pattern_y;

    unsigned int bits;

    unsigned int col;

    int srcskipleft = s->gr[0x2f] & 0x07;

    int dstskipleft = srcskipleft * (DEPTH / 8);

    colors[0] = s->cirrus_blt_bgcol;

    colors[1] = s->cirrus_blt_fgcol;

    pattern_y = s->cirrus_blt_srcaddr & 7;

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

        bits = src[pattern_y];

        bitpos = 7 - srcskipleft;

        d = dst + dstskipleft;

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

            col = colors[(bits >> bitpos) & 1];

            PUTPIXEL();

            d += (DEPTH / 8);

            bitpos = (bitpos - 1) & 7;

        }

        pattern_y = (pattern_y + 1) & 7;

        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