Archipelago » qemu

/*

 * QEMU 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

#define PIXEL_TYPE uint8_t 

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

#define BPP 2

#define PIXEL_TYPE uint16_t 

#elif DEPTH == 32

#define BPP 4

#define PIXEL_TYPE uint32_t 

#else

#error unsupport depth

#endif

#if DEPTH != 15

static inline void glue(vga_draw_glyph_line_, DEPTH)(uint8_t *d, 

                                                     uint32_t font_data,

                                                     uint32_t xorcol, 

                                                     uint32_t bgcol)

{

#if BPP == 1

        ((uint32_t *)d)[0] = (dmask16[(font_data >> 4)] & xorcol) ^ bgcol;

        ((uint32_t *)d)[3] = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;

#elif BPP == 2

        ((uint32_t *)d)[0] = (dmask4[(font_data >> 6)] & xorcol) ^ bgcol;

        ((uint32_t *)d)[1] = (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol;

        ((uint32_t *)d)[2] = (dmask4[(font_data >> 2) & 3] & xorcol) ^ bgcol;

        ((uint32_t *)d)[3] = (dmask4[(font_data >> 0) & 3] & xorcol) ^ bgcol;

#else

        ((uint32_t *)d)[0] = (-((font_data >> 7)) & xorcol) ^ bgcol;

        ((uint32_t *)d)[1] = (-((font_data >> 6) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[2] = (-((font_data >> 5) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[3] = (-((font_data >> 4) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[4] = (-((font_data >> 3) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[5] = (-((font_data >> 2) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[6] = (-((font_data >> 1) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[7] = (-((font_data >> 0) & 1) & xorcol) ^ bgcol;

#endif

}

static void glue(vga_draw_glyph8_, DEPTH)(uint8_t *d, int linesize,

                                          const uint8_t *font_ptr, int h,

                                          uint32_t fgcol, uint32_t bgcol)

{

    uint32_t font_data, xorcol;

    xorcol = bgcol ^ fgcol;

    do {

        font_data = font_ptr[0];

        glue(vga_draw_glyph_line_, DEPTH)(d, font_data, xorcol, bgcol);

        font_ptr += 4;

        d += linesize;

    } while (--h);

}

static void glue(vga_draw_glyph16_, DEPTH)(uint8_t *d, int linesize,

                                          const uint8_t *font_ptr, int h,

                                          uint32_t fgcol, uint32_t bgcol)

{

    uint32_t font_data, xorcol;

    xorcol = bgcol ^ fgcol;

    do {

        font_data = font_ptr[0];

        glue(vga_draw_glyph_line_, DEPTH)(d, 

                                          expand4to8[font_data >> 4], 

                                          xorcol, bgcol);

        glue(vga_draw_glyph_line_, DEPTH)(d + 8 * BPP, 

                                          expand4to8[font_data & 0x0f], 

                                          xorcol, bgcol);

        font_ptr += 4;

        d += linesize;

    } while (--h);

}

static void glue(vga_draw_glyph9_, DEPTH)(uint8_t *d, int linesize,

                                          const uint8_t *font_ptr, int h, 

                                          uint32_t fgcol, uint32_t bgcol, int dup9)

{

    uint32_t font_data, xorcol, v;

    xorcol = bgcol ^ fgcol;

    do {

        font_data = font_ptr[0];

        /* XXX: unaligned accesses are done */

#if BPP == 1

        ((uint32_t *)d)[0] = (dmask16[(font_data >> 4)] & xorcol) ^ bgcol;

        v = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;

        ((uint32_t *)d)[3] = v;

        if (dup9)

            ((uint8_t *)d)[8] = v >> (24 * (1 - BIG));

        else

            ((uint8_t *)d)[8] = bgcol;

#elif BPP == 2

        ((uint32_t *)d)[0] = (dmask4[(font_data >> 6)] & xorcol) ^ bgcol;

        ((uint32_t *)d)[1] = (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol;

        ((uint32_t *)d)[2] = (dmask4[(font_data >> 2) & 3] & xorcol) ^ bgcol;

        v = (dmask4[(font_data >> 0) & 3] & xorcol) ^ bgcol;

        ((uint32_t *)d)[3] = v;

        if (dup9)

            ((uint16_t *)d)[8] = v >> (16 * (1 - BIG));

        else

            ((uint16_t *)d)[8] = bgcol;

#else

        ((uint32_t *)d)[0] = ((-(font_data >> 7)) & xorcol) ^ bgcol;

        ((uint32_t *)d)[1] = ((-(font_data >> 6) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[2] = ((-(font_data >> 5) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[3] = ((-(font_data >> 4) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[4] = ((-(font_data >> 3) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[5] = ((-(font_data >> 2) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[6] = ((-(font_data >> 1) & 1) & xorcol) ^ bgcol;

        v = ((-(font_data >> 0) & 1) & xorcol) ^ bgcol;

        ((uint32_t *)d)[7] = v;

        if (dup9)

            ((uint32_t *)d)[8] = v;

        else

            ((uint32_t *)d)[8] = bgcol;

#endif

        font_ptr += 4;

        d += linesize;

    } while (--h);

}

/* 

 * 4 color mode

 */

static void glue(vga_draw_line2_, DEPTH)(VGAState *s1, uint8_t *d, 

                                         const uint8_t *s, int width)

{

    uint32_t plane_mask, *palette, data, v;

    int x;

    palette = s1->last_palette;

    plane_mask = mask16[s1->ar[0x12] & 0xf];

    width >>= 3;

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

        data = ((uint32_t *)s)[0];

        data &= plane_mask;

        v = expand2[GET_PLANE(data, 0)];

        v |= expand2[GET_PLANE(data, 2)] << 2;

        ((PIXEL_TYPE *)d)[0] = palette[v >> 12];

        ((PIXEL_TYPE *)d)[1] = palette[(v >> 8) & 0xf];

        ((PIXEL_TYPE *)d)[2] = palette[(v >> 4) & 0xf];

        ((PIXEL_TYPE *)d)[3] = palette[(v >> 0) & 0xf];

        v = expand2[GET_PLANE(data, 1)];

        v |= expand2[GET_PLANE(data, 3)] << 2;

        ((PIXEL_TYPE *)d)[4] = palette[v >> 12];

        ((PIXEL_TYPE *)d)[5] = palette[(v >> 8) & 0xf];

        ((PIXEL_TYPE *)d)[6] = palette[(v >> 4) & 0xf];

        ((PIXEL_TYPE *)d)[7] = palette[(v >> 0) & 0xf];

        d += BPP * 8;

        s += 4;

    }

}

#if BPP == 1

#define PUT_PIXEL2(d, n, v) ((uint16_t *)d)[(n)] = (v)

#elif BPP == 2

#define PUT_PIXEL2(d, n, v) ((uint32_t *)d)[(n)] = (v)

#else

#define PUT_PIXEL2(d, n, v) \

((uint32_t *)d)[2*(n)] = ((uint32_t *)d)[2*(n)+1] = (v)

#endif

/* 

 * 4 color mode, dup2 horizontal

 */

static void glue(vga_draw_line2d2_, DEPTH)(VGAState *s1, uint8_t *d, 

                                           const uint8_t *s, int width)

{

    uint32_t plane_mask, *palette, data, v;

    int x;

    palette = s1->last_palette;

    plane_mask = mask16[s1->ar[0x12] & 0xf];

    width >>= 3;

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

        data = ((uint32_t *)s)[0];

        data &= plane_mask;

        v = expand2[GET_PLANE(data, 0)];

        v |= expand2[GET_PLANE(data, 2)] << 2;

        PUT_PIXEL2(d, 0, palette[v >> 12]);

        PUT_PIXEL2(d, 1, palette[(v >> 8) & 0xf]);

        PUT_PIXEL2(d, 2, palette[(v >> 4) & 0xf]);

        PUT_PIXEL2(d, 3, palette[(v >> 0) & 0xf]);

        v = expand2[GET_PLANE(data, 1)];

        v |= expand2[GET_PLANE(data, 3)] << 2;

        PUT_PIXEL2(d, 4, palette[v >> 12]);

        PUT_PIXEL2(d, 5, palette[(v >> 8) & 0xf]);

        PUT_PIXEL2(d, 6, palette[(v >> 4) & 0xf]);

        PUT_PIXEL2(d, 7, palette[(v >> 0) & 0xf]);

        d += BPP * 16;

        s += 4;

    }

}

/* 

 * 16 color mode

 */

static void glue(vga_draw_line4_, DEPTH)(VGAState *s1, uint8_t *d, 

                                         const uint8_t *s, int width)

{

    uint32_t plane_mask, data, v, *palette;

    int x;

    palette = s1->last_palette;

    plane_mask = mask16[s1->ar[0x12] & 0xf];

    width >>= 3;

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

        data = ((uint32_t *)s)[0];

        data &= plane_mask;

        v = expand4[GET_PLANE(data, 0)];

        v |= expand4[GET_PLANE(data, 1)] << 1;

        v |= expand4[GET_PLANE(data, 2)] << 2;

        v |= expand4[GET_PLANE(data, 3)] << 3;

        ((PIXEL_TYPE *)d)[0] = palette[v >> 28];

        ((PIXEL_TYPE *)d)[1] = palette[(v >> 24) & 0xf];

        ((PIXEL_TYPE *)d)[2] = palette[(v >> 20) & 0xf];

        ((PIXEL_TYPE *)d)[3] = palette[(v >> 16) & 0xf];

        ((PIXEL_TYPE *)d)[4] = palette[(v >> 12) & 0xf];

        ((PIXEL_TYPE *)d)[5] = palette[(v >> 8) & 0xf];

        ((PIXEL_TYPE *)d)[6] = palette[(v >> 4) & 0xf];

        ((PIXEL_TYPE *)d)[7] = palette[(v >> 0) & 0xf];

        d += BPP * 8;

        s += 4;

    }

}

/* 

 * 16 color mode, dup2 horizontal

 */

static void glue(vga_draw_line4d2_, DEPTH)(VGAState *s1, uint8_t *d, 

                                           const uint8_t *s, int width)

{

    uint32_t plane_mask, data, v, *palette;

    int x;

    palette = s1->last_palette;

    plane_mask = mask16[s1->ar[0x12] & 0xf];

    width >>= 3;

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

        data = ((uint32_t *)s)[0];

        data &= plane_mask;

        v = expand4[GET_PLANE(data, 0)];

        v |= expand4[GET_PLANE(data, 1)] << 1;

        v |= expand4[GET_PLANE(data, 2)] << 2;

        v |= expand4[GET_PLANE(data, 3)] << 3;

        PUT_PIXEL2(d, 0, palette[v >> 28]);

        PUT_PIXEL2(d, 1, palette[(v >> 24) & 0xf]);

        PUT_PIXEL2(d, 2, palette[(v >> 20) & 0xf]);

        PUT_PIXEL2(d, 3, palette[(v >> 16) & 0xf]);

        PUT_PIXEL2(d, 4, palette[(v >> 12) & 0xf]);

        PUT_PIXEL2(d, 5, palette[(v >> 8) & 0xf]);

        PUT_PIXEL2(d, 6, palette[(v >> 4) & 0xf]);

        PUT_PIXEL2(d, 7, palette[(v >> 0) & 0xf]);

        d += BPP * 16;

        s += 4;

    }

}

/* 

 * 256 color mode, double pixels

 *

 * XXX: add plane_mask support (never used in standard VGA modes)

 */

static void glue(vga_draw_line8d2_, DEPTH)(VGAState *s1, uint8_t *d, 

                                           const uint8_t *s, int width)

{

    uint32_t *palette;

    int x;

    palette = s1->last_palette;

    width >>= 3;

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

        PUT_PIXEL2(d, 0, palette[s[0]]);

        PUT_PIXEL2(d, 1, palette[s[1]]);

        PUT_PIXEL2(d, 2, palette[s[2]]);

        PUT_PIXEL2(d, 3, palette[s[3]]);

        d += BPP * 8;

        s += 4;

    }

}

/* 

 * standard 256 color mode

 *

 * XXX: add plane_mask support (never used in standard VGA modes)

 */

static void glue(vga_draw_line8_, DEPTH)(VGAState *s1, uint8_t *d, 

                                         const uint8_t *s, int width)

{

    uint32_t *palette;

    int x;

    palette = s1->last_palette;

    width >>= 3;

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

        ((PIXEL_TYPE *)d)[0] = palette[s[0]];

        ((PIXEL_TYPE *)d)[1] = palette[s[1]];

        ((PIXEL_TYPE *)d)[2] = palette[s[2]];

        ((PIXEL_TYPE *)d)[3] = palette[s[3]];

        ((PIXEL_TYPE *)d)[4] = palette[s[4]];

        ((PIXEL_TYPE *)d)[5] = palette[s[5]];

        ((PIXEL_TYPE *)d)[6] = palette[s[6]];

        ((PIXEL_TYPE *)d)[7] = palette[s[7]];

        d += BPP * 8;

        s += 8;

    }

}

#endif /* DEPTH != 15 */

/* XXX: optimize */

/* 

 * 15 bit color

 */

static void glue(vga_draw_line15_, DEPTH)(VGAState *s1, uint8_t *d, 

                                          const uint8_t *s, int width)

{

#if DEPTH == 15 && !defined(WORDS_BIGENDIAN)

    memcpy(d, s, width * 2);

#else

    int w;

    uint32_t v, r, g, b;

    w = width;

    do {

        v = lduw_raw((void *)s);

        r = (v >> 7) & 0xf8;

        g = (v >> 2) & 0xf8;

        b = (v << 3) & 0xf8;

        ((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);

        s += 2;

        d += BPP;

    } while (--w != 0);

#endif    

}

/* 

 * 16 bit color

 */

static void glue(vga_draw_line16_, DEPTH)(VGAState *s1, uint8_t *d, 

                                          const uint8_t *s, int width)

{

#if DEPTH == 16 && !defined(WORDS_BIGENDIAN)

    memcpy(d, s, width * 2);

#else

    int w;

    uint32_t v, r, g, b;

    w = width;

    do {

        v = lduw_raw((void *)s);

        r = (v >> 8) & 0xf8;

        g = (v >> 3) & 0xfc;

        b = (v << 3) & 0xf8;

        ((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);

        s += 2;

        d += BPP;

    } while (--w != 0);

#endif    

}

/* 

 * 24 bit color

 */

static void glue(vga_draw_line24_, DEPTH)(VGAState *s1, uint8_t *d, 

                                          const uint8_t *s, int width)

{

    int w;

    uint32_t r, g, b;

    w = width;

    do {

        b = s[0];

        g = s[1];

        r = s[2];

        ((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);

        s += 3;

        d += BPP;

    } while (--w != 0);

}

/* 

 * 32 bit color

 */

static void glue(vga_draw_line32_, DEPTH)(VGAState *s1, uint8_t *d, 

                                          const uint8_t *s, int width)

{

#if DEPTH == 32 && !defined(WORDS_BIGENDIAN)

    memcpy(d, s, width * 4);

#else

    int w;

    uint32_t r, g, b;

    w = width;

    do {

        b = s[0];

        g = s[1];

        r = s[2];

        ((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);

        s += 4;

        d += BPP;

    } while (--w != 0);

#endif

}

#undef PUT_PIXEL2

#undef DEPTH

#undef BPP

#undef PIXEL_TYPE