SDL_blit_0.c File Reference

#include "../SDL_internal.h"
#include "SDL_video.h"
#include "SDL_blit.h"

Include dependency graph for SDL_blit_0.c:

Go to the source code of this file.

Functions
static void	BlitBto1 (SDL_BlitInfo *info)
static void	BlitBto2 (SDL_BlitInfo *info)
static void	BlitBto3 (SDL_BlitInfo *info)
static void	BlitBto4 (SDL_BlitInfo *info)
static void	BlitBto1Key (SDL_BlitInfo *info)
static void	BlitBto2Key (SDL_BlitInfo *info)
static void	BlitBto3Key (SDL_BlitInfo *info)
static void	BlitBto4Key (SDL_BlitInfo *info)
static void	BlitBtoNAlpha (SDL_BlitInfo *info)
static void	BlitBtoNAlphaKey (SDL_BlitInfo *info)
SDL_BlitFunc	SDL_CalculateBlit0 (SDL_Surface *surface)

Variables
static const SDL_BlitFunc	bitmap_blit []
static const SDL_BlitFunc	colorkey_blit []

Function Documentation

static void BlitBto1 ( SDL_BlitInfo *  info )

static

Definition at line 29 of file SDL_blit_0.c.

References SDL_BlitInfo::dst, SDL_BlitInfo::dst_h, SDL_BlitInfo::dst_skip, SDL_BlitInfo::dst_w, map, SDL_BlitInfo::src, SDL_BlitInfo::src_skip, and SDL_BlitInfo::table.

{
    int c;
    int width, height;
    Uint8 *src, *map, *dst;
    int srcskip, dstskip;

    /* Set up some basic variables */
    width = info->dst_w;
    height = info->dst_h;
    src = info->src;
    srcskip = info->src_skip;
    dst = info->dst;
    dstskip = info->dst_skip;
    map = info->table;
    srcskip += width - (width + 7) / 8;

    if (map) {
        while (height--) {
            Uint8 byte = 0, bit;
            for (c = 0; c < width; ++c) {
                if ((c & 7) == 0) {
                    byte = *src++;
                }
                bit = (byte & 0x80) >> 7;
                if (1) {
                    *dst = map[bit];
                }
                dst++;
                byte <<= 1;
            }
            src += srcskip;
            dst += dstskip;
        }
    } else {
        while (height--) {
            Uint8 byte = 0, bit;
            for (c = 0; c < width; ++c) {
                if ((c & 7) == 0) {
                    byte = *src++;
                }
                bit = (byte & 0x80) >> 7;
                if (1) {
                    *dst = bit;
                }
                dst++;
                byte <<= 1;
            }
            src += srcskip;
            dst += dstskip;
        }
    }
}

static void BlitBto1Key ( SDL_BlitInfo *  info )

static

Definition at line 197 of file SDL_blit_0.c.

References SDL_BlitInfo::colorkey, SDL_BlitInfo::dst, SDL_BlitInfo::dst_h, SDL_BlitInfo::dst_skip, SDL_BlitInfo::dst_w, SDL_BlitInfo::src, SDL_BlitInfo::src_skip, and SDL_BlitInfo::table.

{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    Uint8 *dst = info->dst;
    int srcskip = info->src_skip;
    int dstskip = info->dst_skip;
    Uint32 ckey = info->colorkey;
    Uint8 *palmap = info->table;
    int c;

    /* Set up some basic variables */
    srcskip += width - (width + 7) / 8;

    if (palmap) {
        while (height--) {
            Uint8 byte = 0, bit;
            for (c = 0; c < width; ++c) {
                if ((c & 7) == 0) {
                    byte = *src++;
                }
                bit = (byte & 0x80) >> 7;
                if (bit != ckey) {
                    *dst = palmap[bit];
                }
                dst++;
                byte <<= 1;
            }
            src += srcskip;
            dst += dstskip;
        }
    } else {
        while (height--) {
            Uint8 byte = 0, bit;
            for (c = 0; c < width; ++c) {
                if ((c & 7) == 0) {
                    byte = *src++;
                }
                bit = (byte & 0x80) >> 7;
                if (bit != ckey) {
                    *dst = bit;
                }
                dst++;
                byte <<= 1;
            }
            src += srcskip;
            dst += dstskip;
        }
    }
}

static void BlitBto2 ( SDL_BlitInfo *  info )

static

Definition at line 84 of file SDL_blit_0.c.

References SDL_BlitInfo::dst, SDL_BlitInfo::dst_h, SDL_BlitInfo::dst_skip, SDL_BlitInfo::dst_w, map, SDL_BlitInfo::src, SDL_BlitInfo::src_skip, and SDL_BlitInfo::table.

{
    int c;
    int width, height;
    Uint8 *src;
    Uint16 *map, *dst;
    int srcskip, dstskip;

    /* Set up some basic variables */
    width = info->dst_w;
    height = info->dst_h;
    src = info->src;
    srcskip = info->src_skip;
    dst = (Uint16 *) info->dst;
    dstskip = info->dst_skip / 2;
    map = (Uint16 *) info->table;
    srcskip += width - (width + 7) / 8;

    while (height--) {
        Uint8 byte = 0, bit;
        for (c = 0; c < width; ++c) {
            if ((c & 7) == 0) {
                byte = *src++;
            }
            bit = (byte & 0x80) >> 7;
            if (1) {
                *dst = map[bit];
            }
            byte <<= 1;
            dst++;
        }
        src += srcskip;
        dst += dstskip;
    }
}

static void BlitBto2Key ( SDL_BlitInfo *  info )

static

Definition at line 250 of file SDL_blit_0.c.

References SDL_BlitInfo::colorkey, SDL_BlitInfo::dst, SDL_BlitInfo::dst_h, SDL_BlitInfo::dst_skip, SDL_BlitInfo::dst_w, SDL_BlitInfo::src, SDL_BlitInfo::src_skip, and SDL_BlitInfo::table.

{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    Uint16 *dstp = (Uint16 *) info->dst;
    int srcskip = info->src_skip;
    int dstskip = info->dst_skip;
    Uint32 ckey = info->colorkey;
    Uint8 *palmap = info->table;
    int c;

    /* Set up some basic variables */
    srcskip += width - (width + 7) / 8;
    dstskip /= 2;

    while (height--) {
        Uint8 byte = 0, bit;
        for (c = 0; c < width; ++c) {
            if ((c & 7) == 0) {
                byte = *src++;
            }
            bit = (byte & 0x80) >> 7;
            if (bit != ckey) {
                *dstp = ((Uint16 *) palmap)[bit];
            }
            byte <<= 1;
            dstp++;
        }
        src += srcskip;
        dstp += dstskip;
    }
}

static void BlitBto3 ( SDL_BlitInfo *  info )

static

Definition at line 121 of file SDL_blit_0.c.

References SDL_BlitInfo::dst, SDL_BlitInfo::dst_h, SDL_BlitInfo::dst_skip, SDL_BlitInfo::dst_w, map, SDL_BlitInfo::src, SDL_BlitInfo::src_skip, and SDL_BlitInfo::table.

{
    int c, o;
    int width, height;
    Uint8 *src, *map, *dst;
    int srcskip, dstskip;

    /* Set up some basic variables */
    width = info->dst_w;
    height = info->dst_h;
    src = info->src;
    srcskip = info->src_skip;
    dst = info->dst;
    dstskip = info->dst_skip;
    map = info->table;
    srcskip += width - (width + 7) / 8;

    while (height--) {
        Uint8 byte = 0, bit;
        for (c = 0; c < width; ++c) {
            if ((c & 7) == 0) {
                byte = *src++;
            }
            bit = (byte & 0x80) >> 7;
            if (1) {
                o = bit * 4;
                dst[0] = map[o++];
                dst[1] = map[o++];
                dst[2] = map[o++];
            }
            byte <<= 1;
            dst += 3;
        }
        src += srcskip;
        dst += dstskip;
    }
}

static void BlitBto3Key ( SDL_BlitInfo *  info )

static

Definition at line 285 of file SDL_blit_0.c.

References SDL_BlitInfo::colorkey, SDL_BlitInfo::dst, SDL_BlitInfo::dst_h, SDL_BlitInfo::dst_skip, SDL_BlitInfo::dst_w, SDL_memcpy, SDL_BlitInfo::src, SDL_BlitInfo::src_skip, and SDL_BlitInfo::table.

{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    Uint8 *dst = info->dst;
    int srcskip = info->src_skip;
    int dstskip = info->dst_skip;
    Uint32 ckey = info->colorkey;
    Uint8 *palmap = info->table;
    int c;

    /* Set up some basic variables */
    srcskip += width - (width + 7) / 8;

    while (height--) {
        Uint8 byte = 0, bit;
        for (c = 0; c < width; ++c) {
            if ((c & 7) == 0) {
                byte = *src++;
            }
            bit = (byte & 0x80) >> 7;
            if (bit != ckey) {
                SDL_memcpy(dst, &palmap[bit * 4], 3);
            }
            byte <<= 1;
            dst += 3;
        }
        src += srcskip;
        dst += dstskip;
    }
}

static void BlitBto4 ( SDL_BlitInfo *  info )

static

Definition at line 160 of file SDL_blit_0.c.

References SDL_BlitInfo::dst, SDL_BlitInfo::dst_h, SDL_BlitInfo::dst_skip, SDL_BlitInfo::dst_w, map, SDL_BlitInfo::src, SDL_BlitInfo::src_skip, and SDL_BlitInfo::table.

{
    int width, height;
    Uint8 *src;
    Uint32 *map, *dst;
    int srcskip, dstskip;
    int c;

    /* Set up some basic variables */
    width = info->dst_w;
    height = info->dst_h;
    src = info->src;
    srcskip = info->src_skip;
    dst = (Uint32 *) info->dst;
    dstskip = info->dst_skip / 4;
    map = (Uint32 *) info->table;
    srcskip += width - (width + 7) / 8;

    while (height--) {
        Uint8 byte = 0, bit;
        for (c = 0; c < width; ++c) {
            if ((c & 7) == 0) {
                byte = *src++;
            }
            bit = (byte & 0x80) >> 7;
            if (1) {
                *dst = map[bit];
            }
            byte <<= 1;
            dst++;
        }
        src += srcskip;
        dst += dstskip;
    }
}

static void BlitBto4Key ( SDL_BlitInfo *  info )

static

Definition at line 319 of file SDL_blit_0.c.

References SDL_BlitInfo::colorkey, SDL_BlitInfo::dst, SDL_BlitInfo::dst_h, SDL_BlitInfo::dst_skip, SDL_BlitInfo::dst_w, SDL_BlitInfo::src, SDL_BlitInfo::src_skip, and SDL_BlitInfo::table.

{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    Uint32 *dstp = (Uint32 *) info->dst;
    int srcskip = info->src_skip;
    int dstskip = info->dst_skip;
    Uint32 ckey = info->colorkey;
    Uint8 *palmap = info->table;
    int c;

    /* Set up some basic variables */
    srcskip += width - (width + 7) / 8;
    dstskip /= 4;

    while (height--) {
        Uint8 byte = 0, bit;
        for (c = 0; c < width; ++c) {
            if ((c & 7) == 0) {
                byte = *src++;
            }
            bit = (byte & 0x80) >> 7;
            if (bit != ckey) {
                *dstp = ((Uint32 *) palmap)[bit];
            }
            byte <<= 1;
            dstp++;
        }
        src += srcskip;
        dstp += dstskip;
    }
}

static void BlitBtoNAlpha ( SDL_BlitInfo *  info )

static

Definition at line 354 of file SDL_blit_0.c.

References SDL_BlitInfo::a, ALPHA_BLEND_RGBA, ASSEMBLE_RGBA, SDL_Color::b, SDL_PixelFormat::BytesPerPixel, SDL_Palette::colors, DISEMBLE_RGBA, SDL_BlitInfo::dst, SDL_BlitInfo::dst_fmt, SDL_BlitInfo::dst_h, SDL_BlitInfo::dst_skip, SDL_BlitInfo::dst_w, SDL_Color::g, SDL_PixelFormat::palette, SDL_Color::r, SDL_BlitInfo::src, SDL_BlitInfo::src_fmt, and SDL_BlitInfo::src_skip.

Referenced by SDL_CalculateBlit0().

{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    Uint8 *dst = info->dst;
    int srcskip = info->src_skip;
    int dstskip = info->dst_skip;
    const SDL_Color *srcpal = info->src_fmt->palette->colors;
    SDL_PixelFormat *dstfmt = info->dst_fmt;
    int dstbpp;
    int c;
    Uint32 pixel;
    unsigned sR, sG, sB;
    unsigned dR, dG, dB, dA;
    const unsigned A = info->a;

    /* Set up some basic variables */
    dstbpp = dstfmt->BytesPerPixel;
    srcskip += width - (width + 7) / 8;

    while (height--) {
        Uint8 byte = 0, bit;
        for (c = 0; c < width; ++c) {
            if ((c & 7) == 0) {
                byte = *src++;
            }
            bit = (byte & 0x80) >> 7;
            if (1) {
                sR = srcpal[bit].r;
                sG = srcpal[bit].g;
                sB = srcpal[bit].b;
                DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA);
                ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA);
                ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
            }
            byte <<= 1;
            dst += dstbpp;
        }
        src += srcskip;
        dst += dstskip;
    }
}

static void BlitBtoNAlphaKey ( SDL_BlitInfo *  info )

static

Definition at line 399 of file SDL_blit_0.c.

References SDL_BlitInfo::a, ALPHA_BLEND_RGBA, ASSEMBLE_RGBA, SDL_Color::b, SDL_PixelFormat::BytesPerPixel, SDL_BlitInfo::colorkey, SDL_Palette::colors, DISEMBLE_RGBA, SDL_BlitInfo::dst, SDL_BlitInfo::dst_fmt, SDL_BlitInfo::dst_h, SDL_BlitInfo::dst_skip, SDL_BlitInfo::dst_w, SDL_Color::g, SDL_PixelFormat::palette, SDL_Color::r, SDL_BlitInfo::src, SDL_BlitInfo::src_fmt, and SDL_BlitInfo::src_skip.

Referenced by SDL_CalculateBlit0().

{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    Uint8 *dst = info->dst;
    int srcskip = info->src_skip;
    int dstskip = info->dst_skip;
    SDL_PixelFormat *srcfmt = info->src_fmt;
    SDL_PixelFormat *dstfmt = info->dst_fmt;
    const SDL_Color *srcpal = srcfmt->palette->colors;
    int dstbpp;
    int c;
    Uint32 pixel;
    unsigned sR, sG, sB;
    unsigned dR, dG, dB, dA;
    const unsigned A = info->a;
    Uint32 ckey = info->colorkey;

    /* Set up some basic variables */
    dstbpp = dstfmt->BytesPerPixel;
    srcskip += width - (width + 7) / 8;

    while (height--) {
        Uint8 byte = 0, bit;
        for (c = 0; c < width; ++c) {
            if ((c & 7) == 0) {
                byte = *src++;
            }
            bit = (byte & 0x80) >> 7;
            if (bit != ckey) {
                sR = srcpal[bit].r;
                sG = srcpal[bit].g;
                sB = srcpal[bit].b;
                DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA);
                ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA);
                ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
            }
            byte <<= 1;
            dst += dstbpp;
        }
        src += srcskip;
        dst += dstskip;
    }
}

SDL_BlitFunc SDL_CalculateBlit0

(

SDL_Surface *

surface

)

Definition at line 454 of file SDL_blit_0.c.

References bitmap_blit, SDL_PixelFormat::BitsPerPixel, BlitBtoNAlpha(), BlitBtoNAlphaKey(), SDL_PixelFormat::BytesPerPixel, SDL_BlitMap::dst, SDL_BlitInfo::flags, SDL_Surface::format, SDL_BlitMap::info, SDL_Surface::map, NULL, SDL_COPY_BLEND, SDL_COPY_COLORKEY, SDL_COPY_MODULATE_ALPHA, and SDL_COPY_RLE_MASK.

Referenced by SDL_CalculateBlit().

{
    int which;

    if (surface->format->BitsPerPixel != 1) {
        /* We don't support sub 8-bit packed pixel modes */
        return (SDL_BlitFunc) NULL;
    }
    if (surface->map->dst->format->BitsPerPixel < 8) {
        which = 0;
    } else {
        which = surface->map->dst->format->BytesPerPixel;
    }
    switch (surface->map->info.flags & ~SDL_COPY_RLE_MASK) {
    case 0:
        return bitmap_blit[which];

    case SDL_COPY_COLORKEY:
        return colorkey_blit[which];

    case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
        return which >= 2 ? BlitBtoNAlpha : (SDL_BlitFunc) NULL;

    case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
        return which >= 2 ? BlitBtoNAlphaKey : (SDL_BlitFunc) NULL;
    }
    return (SDL_BlitFunc) NULL;
}

Variable Documentation

const SDL_BlitFunc bitmap_blit[]

static

Initial value:

 {
    (SDL_BlitFunc) NULL, BlitBto1, BlitBto2, BlitBto3, BlitBto4
}

Definition at line 445 of file SDL_blit_0.c.

Referenced by SDL_CalculateBlit0().

const SDL_BlitFunc colorkey_blit[]

static

Initial value:

 {
    (SDL_BlitFunc) NULL, BlitBto1Key, BlitBto2Key, BlitBto3Key, BlitBto4Key
}

Definition at line 449 of file SDL_blit_0.c.