Archipelago » qemu

/*

 * QEMU Cirrus VGA Emulator templates

 *

 * Copyright (c) 2003 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 BPP 1

#elif DEPTH == 15 || DEPTH == 16

#define BPP 2

#elif DEPTH == 32

#define BPP 4

#else

#error unsupported depth

#endif

static void glue(vga_draw_cursor_line_, DEPTH)(uint8_t *d1,

                                               const uint8_t *src1,

                                               int poffset, int w,

                                               unsigned int color0,

                                               unsigned int color1,

                                               unsigned int color_xor)

{

    const uint8_t *plane0, *plane1;

    int x, b0, b1;

    uint8_t *d;

    d = d1;

    plane0 = src1;

    plane1 = src1 + poffset;

    for (x = 0; x < w; x++) {

        b0 = (plane0[x >> 3] >> (7 - (x & 7))) & 1;

        b1 = (plane1[x >> 3] >> (7 - (x & 7))) & 1;

#if DEPTH == 8

        switch (b0 | (b1 << 1)) {

        case 0:

            break;

        case 1:

            d[0] ^= color_xor;

            break;

        case 2:

            d[0] = color0;

            break;

        case 3:

            d[0] = color1;

            break;

        }

#elif DEPTH == 16

        switch (b0 | (b1 << 1)) {

        case 0:

            break;

        case 1:

            ((uint16_t *)d)[0] ^= color_xor;

            break;

        case 2:

            ((uint16_t *)d)[0] = color0;

            break;

        case 3:

            ((uint16_t *)d)[0] = color1;

            break;

        }

#elif DEPTH == 32

        switch (b0 | (b1 << 1)) {

        case 0:

            break;

        case 1:

            ((uint32_t *)d)[0] ^= color_xor;

            break;

        case 2:

            ((uint32_t *)d)[0] = color0;

            break;

        case 3:

            ((uint32_t *)d)[0] = color1;

            break;

        }

#else

#error unsupported depth

#endif

        d += BPP;

    }

}

#undef DEPTH

#undef BPP