/*- * Copyright (c) 1999 Michael Smith * Copyright (c) 1999 Kazutaka YOKOTA * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Id:$ */ #include #include #include #include #include #include #include #define FADE_TIMEOUT 300 /* sec */ static int splash_mode = -1; static int splash_on = FALSE; static int bmp_start(video_adapter_t *adp); static int bmp_end(video_adapter_t *adp); static int bmp_splash(video_adapter_t *adp, int on); static int bmp_Init(const char *data, int swidth, int sheight, int sdepth); static int bmp_Draw(video_adapter_t *adp); static splash_decoder_t bmp_decoder = { "splash_bmp", bmp_start, bmp_end, bmp_splash, SPLASH_IMAGE, }; SPLASH_DECODER(splash_bmp, bmp_decoder); static int bmp_start(video_adapter_t *adp) { static int modes[] = { M_VGA_CG320, -1, }; video_info_t info; int i; if ((bmp_decoder.data == NULL) || (bmp_decoder.data_size <= 0)) return ENODEV; for (i = 0; modes[i] >= 0; ++i) { if (((*vidsw[adp->va_index]->get_info)(adp, modes[i], &info) == 0) && (bmp_Init((u_char *)bmp_decoder.data, info.vi_width, info.vi_height, info.vi_depth) == 0)) break; } splash_mode = modes[i]; if (bootverbose) printf("bmp_start(): splash_mode:%d\n", splash_mode); return ((splash_mode < 0) ? ENODEV : 0); } static int bmp_end(video_adapter_t *adp) { /* nothing to do */ return 0; } static int bmp_splash(video_adapter_t *adp, int on) { static u_char pal[256*3]; static long time_stamp; struct timeval tv; int i; if (on) { if (!splash_on) { /* set up the video mode and draw something */ if ((*vidsw[adp->va_index]->set_mode)(adp, splash_mode)) return 1; if (bmp_Draw(adp)) return 1; (*vidsw[adp->va_index]->save_palette)(adp, pal); time_stamp = 0; splash_on = TRUE; } /* * This is a kludge to fade the image away. This section of the * code takes effect only after the system is completely up. */ if (!cold) { getmicrotime(&tv); if (time_stamp == 0) time_stamp = tv.tv_sec; if (tv.tv_sec > time_stamp + FADE_TIMEOUT) { for (i = 0; i < sizeof(pal); ++i) { if (pal[i] > 40) pal[i] -= 4; } (*vidsw[adp->va_index]->load_palette)(adp, pal); } } return 0; } else { /* the video mode will be restored by the caller */ splash_on = FALSE; return 0; } } /* ** Code to handle Microsoft DIB (".BMP") format images. ** ** Blame me (msmith@freebsd.org) if this is broken, not Soren. */ typedef struct tagBITMAPFILEHEADER { /* bmfh */ u_short bfType __attribute__ ((packed)); int bfSize __attribute__ ((packed)); u_short bfReserved1 __attribute__ ((packed)); u_short bfReserved2 __attribute__ ((packed)); int bfOffBits __attribute__ ((packed)); } BITMAPFILEHEADER; typedef struct tagBITMAPINFOHEADER { /* bmih */ int biSize __attribute__ ((packed)); int biWidth __attribute__ ((packed)); int biHeight __attribute__ ((packed)); short biPlanes __attribute__ ((packed)); short biBitCount __attribute__ ((packed)); int biCompression __attribute__ ((packed)); int biSizeImage __attribute__ ((packed)); int biXPelsPerMeter __attribute__ ((packed)); int biYPelsPerMeter __attribute__ ((packed)); int biClrUsed __attribute__ ((packed)); int biClrImportant __attribute__ ((packed)); } BITMAPINFOHEADER; typedef struct tagRGBQUAD { /* rgbq */ u_char rgbBlue __attribute__ ((packed)); u_char rgbGreen __attribute__ ((packed)); u_char rgbRed __attribute__ ((packed)); u_char rgbReserved __attribute__ ((packed)); } RGBQUAD; typedef struct tagBITMAPINFO { /* bmi */ BITMAPINFOHEADER bmiHeader __attribute__ ((packed)); RGBQUAD bmiColors[256] __attribute__ ((packed)); } BITMAPINFO; typedef struct tagBITMAPF { BITMAPFILEHEADER bmfh __attribute__ ((packed)); BITMAPINFO bmfi __attribute__ ((packed)); } BITMAPF; #define BI_RGB 0 #define BI_RLE8 1 #define BI_RLE4 2 /* ** all we actually care about the image */ typedef struct { int width,height; /* image dimensions */ int swidth,sheight; /* screen dimensions for the current mode */ u_char sdepth; /* screen depth (1, 4, 8 bpp) */ int ncols; /* number of colours */ u_char palette[256][3]; /* raw palette data */ u_char format; /* one of the BI_* constants above */ u_char *data; /* pointer to the raw data */ u_char *index; /* running pointer to the data while drawing */ u_char *vidmem; /* video memory allocated for drawing */ } BMP_INFO; static BMP_INFO bmp_info; /* ** bmp_SetPix ** ** Given (info), set the pixel at (x),(y) to (val) ** */ static void bmp_SetPix(BMP_INFO *info, int x, int y, u_char val) { int sofs, bofs; u_char tpv, mask; /* * range check to avoid explosions */ if ((x < 0) || (x >= info->swidth) || (y < 0) || (y >= info->sheight)) return; /* * calculate offset into video memory; * because 0,0 is bottom-left for DIB, we have to convert. */ sofs = ((info->height - (y+1) + (info->sheight - info->height) / 2) * info->swidth) + x + (info->swidth - info->width) / 2; switch(info->sdepth) { case 1: sofs = sofs >> 3; /* correct for depth */ bofs = x & 0x7; /* offset within byte */ val &= 1; /* mask pixel value */ mask = ~(0x80 >> bofs); /* calculate bit mask */ tpv = *(info->vidmem+sofs) & mask; /* get screen contents, excluding masked bit */ *(info->vidmem+sofs) = tpv | (val << (8-bofs)); /* write new bit */ break; /* XXX only correct for non-interleaved modes */ case 4: sofs = sofs >> 1; /* correct for depth */ bofs = x & 0x1; /* offset within byte */ val &= 0xf; /* mask pixel value */ mask = bofs ? 0x0f : 0xf0; /* calculate bit mask */ tpv = *(info->vidmem+sofs) & mask; /* get screen contents, excluding masked bits */ *(info->vidmem+sofs) = tpv | (val << (bofs ? 0 : 4)); /* write new bits */ break; case 8: *(info->vidmem+sofs) = val; break; } } /* ** bmp_DecodeRLE4 ** ** Given (data) pointing to a line of RLE4-format data and (line) being the starting ** line onscreen, decode the line. */ static void bmp_DecodeRLE4(BMP_INFO *info, int line) { int count; /* run count */ u_char val; int x,y; /* screen position */ x = 0; /* starting position */ y = line; /* loop reading data */ for (;;) { /* * encoded mode starts with a run length, and then a byte with * two colour indexes to alternate between for the run */ if (*info->index) { for (count = 0; count < *info->index; count++, x++) { if (count & 1) { /* odd count, low nybble */ bmp_SetPix(info, x, y, *(info->index+1) & 0x0f); } else { /* even count, high nybble */ bmp_SetPix(info, x, y, (*(info->index+1) >>4) & 0x0f); } } info->index += 2; /* * A leading zero is an escape; it may signal the end of the * bitmap, a cursor move, or some absolute data. */ } else { /* zero tag may be absolute mode or an escape */ switch (*(info->index+1)) { case 0: /* end of line */ info->index += 2; return; case 1: /* end of bitmap */ info->index = NULL; return; case 2: /* move */ x += *(info->index + 2); /* new coords */ y += *(info->index + 3); info->index += 4; break; default: /* literal bitmap data */ for (count = 0; count < *(info->index + 1); count++, x++) { val = *(info->index + 2 + (count / 2)); /* byte with nybbles */ if (count & 1) { val &= 0xf; /* get low nybble */ } else { val = (val >> 4); /* get high nybble */ } bmp_SetPix(info, x, y, val); } /* warning, this depends on integer truncation, do not hand-optimise! */ info->index += 2 + ((count + 3) / 4) * 2; break; } } } } /* ** bmp_DecodeRLE8 ** Given (data) pointing to a line of RLE4-format data and (line) being the starting ** line onscreen, decode the line. */ static void bmp_DecodeRLE8(BMP_INFO *info, int line) { int count; /* run count */ int x,y; /* screen position */ x = 0; /* starting position */ y = line; /* loop reading data */ for(;;) { /* * encoded mode starts with a run length, and then a byte with * two colour indexes to alternate between for the run */ if (*info->index) { for (count = 0; count < *info->index; count++, x++) bmp_SetPix(info, x, y, *(info->index+1)); info->index += 2; /* * A leading zero is an escape; it may signal the end of the * bitmap, a cursor move, or some absolute data. */ } else { /* zero tag may be absolute mode or an escape */ switch(*(info->index+1)) { case 0: /* end of line */ info->index += 2; return; case 1: /* end of bitmap */ info->index = NULL; return; case 2: /* move */ x += *(info->index + 2); /* new coords */ y += *(info->index + 3); info->index += 4; break; default: /* literal bitmap data */ for (count = 0; count < *(info->index + 1); count++, x++) bmp_SetPix(info, x, y, *(info->index + 2 + count)); /* must be an even count */ info->index += 2 + count + (count & 1); break; } } } } /* ** bmp_DecodeLine ** ** Given (info) pointing to an image being decoded, (line) being the line currently ** being displayed, decode a line of data. */ static void bmp_DecodeLine(BMP_INFO *info, int line) { int x; switch(info->format) { case BI_RGB: for (x = 0; x < info->width; x++, info->index++) bmp_SetPix(info, x, line, *info->index); info->index += 4 - (x % 4); break; case BI_RLE4: bmp_DecodeRLE4(info, line); break; case BI_RLE8: bmp_DecodeRLE8(info, line); break; } } /* ** bmp_Init ** ** Given a pointer (data) to the image of a BMP file, fill in bmp_info with what ** can be learnt from it. Return nonzero if the file isn't usable. ** ** Take screen dimensions (swidth), (sheight) and (sdepth) and make sure we ** can work with these. */ static int bmp_Init(const char *data, int swidth, int sheight, int sdepth) { BITMAPF *bmf = (BITMAPF *)data; int pind; bmp_info.data = NULL; /* assume setup failed */ #if 0 bmp_info.vidmem = vidmem; /* remember where */ #endif /* check file ID */ if (bmf->bmfh.bfType != 0x4d42) { return(1); /* XXX check word ordering for big-endian ports? */ } /* save what we know about the screen */ bmp_info.swidth = swidth; bmp_info.sheight = sheight; bmp_info.sdepth = sdepth; /* where's the data? */ bmp_info.data = (u_char *)data + bmf->bmfh.bfOffBits; /* image parameters */ bmp_info.width = bmf->bmfi.bmiHeader.biWidth; bmp_info.height = bmf->bmfi.bmiHeader.biHeight; bmp_info.format = bmf->bmfi.bmiHeader.biCompression; switch(bmp_info.format) { /* check compression format */ case BI_RGB: case BI_RLE4: case BI_RLE8: break; default: return(1); /* unsupported compression format */ } /* palette details */ bmp_info.ncols = (bmf->bmfi.bmiHeader.biClrUsed); bzero(bmp_info.palette,sizeof(bmp_info.palette)); if (bmp_info.ncols == 0) { /* uses all of them */ bmp_info.ncols = 2 << bmf->bmfi.bmiHeader.biBitCount; } if ((bmp_info.height > bmp_info.sheight) || (bmp_info.width > bmp_info.swidth) || (bmp_info.ncols > (1 << sdepth))) { return(1); /* beyond screen capacity */ } /* read palette */ for (pind = 0; pind < bmp_info.ncols; pind++) { bmp_info.palette[pind][0] = bmf->bmfi.bmiColors[pind].rgbRed; bmp_info.palette[pind][1] = bmf->bmfi.bmiColors[pind].rgbGreen; bmp_info.palette[pind][2] = bmf->bmfi.bmiColors[pind].rgbBlue; } return(0); } /* ** bmp_Draw ** ** Render the image. Return nonzero if that's not possible. ** */ static int bmp_Draw(video_adapter_t *adp) { int line; if (bmp_info.data == NULL) { /* init failed, do nothing */ return(1); } /* clear the screen */ bmp_info.vidmem = (u_char *)adp->va_window; /* XXX; the following line is correct only for 8bpp modes */ bzero(bmp_info.vidmem, bmp_info.swidth * bmp_info.sheight); /* initialise the info structure for drawing */ bmp_info.index = bmp_info.data; /* set the palette for our image */ (*vidsw[adp->va_index]->load_palette)(adp, (u_char *)&bmp_info.palette); for (line = 0; (line < bmp_info.height) && bmp_info.index; line++) { bmp_DecodeLine(&bmp_info, line); } return(0); }