Matteo Bruni : d3dx9: Fix memory access for images with less than 4 bytes per pixel (Valgrind).
Module: wine Branch: master Commit: 85a578f7828b7204cb1a8f7cbda929ac9754df13 URL: http://source.winehq.org/git/wine.git/?a=commit;h=85a578f7828b7204cb1a8f7cbd... Author: Matteo Bruni <mbruni(a)codeweavers.com> Date: Wed Feb 16 02:39:21 2011 +0100 d3dx9: Fix memory access for images with less than 4 bytes per pixel (Valgrind). --- dlls/d3dx9_36/surface.c | 77 +++++++++++++++++++++++++++++++++++++---------- 1 files changed, 61 insertions(+), 16 deletions(-) diff --git a/dlls/d3dx9_36/surface.c b/dlls/d3dx9_36/surface.c index 48cd2c2..a45349f 100644 --- a/dlls/d3dx9_36/surface.c +++ b/dlls/d3dx9_36/surface.c @@ -598,6 +598,39 @@ static void init_argb_conversion_info(CONST PixelFormatDesc *srcformat, CONST Pi } } +static DWORD dword_from_bytes(CONST BYTE *src, UINT bytes_per_pixel) +{ + DWORD ret = 0; + static BOOL fixme_once; + + if(bytes_per_pixel > sizeof(DWORD)) { + if(!fixme_once) { + FIXME("Unsupported image: %u bytes per pixel\n", bytes_per_pixel); + fixme_once = TRUE; + } + bytes_per_pixel = sizeof(DWORD); + } + + memcpy(&ret, src, bytes_per_pixel); + return ret; +} + +static void dword_to_bytes(BYTE *dst, DWORD dword, UINT bytes_per_pixel) +{ + static BOOL fixme_once; + + if(bytes_per_pixel > sizeof(DWORD)) { + if(!fixme_once++) { + FIXME("Unsupported image: %u bytes per pixel\n", bytes_per_pixel); + fixme_once = TRUE; + } + ZeroMemory(dst, bytes_per_pixel); + bytes_per_pixel = sizeof(DWORD); + } + + memcpy(dst, &dword, bytes_per_pixel); +} + /************************************************************ * get_relevant_argb_components * @@ -618,20 +651,21 @@ static void get_relevant_argb_components(CONST struct argb_conversion_info *info * Recombines the output of get_relevant_argb_components and converts * it to the destination format. */ -static void make_argb_color(CONST struct argb_conversion_info *info, CONST DWORD *in, DWORD *out) +static DWORD make_argb_color(CONST struct argb_conversion_info *info, CONST DWORD *in) { UINT i; - *out = 0; + DWORD val = 0; for(i = 0;i < 4;i++) { if(info->process_channel[i]) { /* necessary to make sure that e.g. an X4R4G4B4 white maps to an R8G8B8 white instead of 0xf0f0f0 */ signed int shift; - for(shift = info->destshift[i]; shift > info->destformat->shift[i]; shift -= info->srcformat->bits[i]) *out |= in[i] << shift; - *out |= (in[i] >> (info->destformat->shift[i] - shift)) << info->destformat->shift[i]; + for(shift = info->destshift[i]; shift > info->destformat->shift[i]; shift -= info->srcformat->bits[i]) val |= in[i] << shift; + val |= (in[i] >> (info->destformat->shift[i] - shift)) << info->destformat->shift[i]; } } - *out |= info->channelmask; /* new channels are set to their maximal value */ + val |= info->channelmask; /* new channels are set to their maximal value */ + return val; } /************************************************************ @@ -668,23 +702,29 @@ static void copy_simple_data(CONST BYTE *src, UINT srcpitch, POINT srcsize, } for(y = 0;y < minheight;y++) { - const BYTE *srcptr = src + y * srcpitch; + const BYTE *srcptr = src + y * srcpitch; BYTE *destptr = dest + y * destpitch; + DWORD val = 0; + for(x = 0;x < minwidth;x++) { /* extract source color components */ - if(srcformat->type == FORMAT_ARGB) get_relevant_argb_components(&conv_info, *(const DWORD*)srcptr, channels); + if(srcformat->type == FORMAT_ARGB) { + pixel = dword_from_bytes(srcptr, srcformat->bytes_per_pixel); + get_relevant_argb_components(&conv_info, pixel, channels); + } /* recombine the components */ - if(destformat->type == FORMAT_ARGB) make_argb_color(&conv_info, channels, (DWORD*)destptr); + if(destformat->type == FORMAT_ARGB) val = make_argb_color(&conv_info, channels); if(colorkey) { - get_relevant_argb_components(&ck_conv_info, *(const DWORD*)srcptr, channels); - make_argb_color(&ck_conv_info, channels, &pixel); + get_relevant_argb_components(&ck_conv_info, pixel, channels); + pixel = make_argb_color(&ck_conv_info, channels); if(pixel == colorkey) /* make this pixel transparent */ - *(DWORD *)destptr &= ~conv_info.destmask[0]; + val &= ~conv_info.destmask[0]; } + dword_to_bytes(destptr, val, destformat->bytes_per_pixel); srcptr += srcformat->bytes_per_pixel; destptr += destformat->bytes_per_pixel; } @@ -732,21 +772,26 @@ static void point_filter_simple_data(CONST BYTE *src, UINT srcpitch, POINT srcsi for(x = 0;x < destsize.x;x++) { const BYTE *srcptr = bufptr + (x * srcsize.x / destsize.x) * srcformat->bytes_per_pixel; + DWORD val = 0; /* extract source color components */ - if(srcformat->type == FORMAT_ARGB) get_relevant_argb_components(&conv_info, *(const DWORD*)srcptr, channels); + if(srcformat->type == FORMAT_ARGB) { + pixel = dword_from_bytes(srcptr, srcformat->bytes_per_pixel); + get_relevant_argb_components(&conv_info, pixel, channels); + } /* recombine the components */ - if(destformat->type == FORMAT_ARGB) make_argb_color(&conv_info, channels, (DWORD*)destptr); + if(destformat->type == FORMAT_ARGB) val = make_argb_color(&conv_info, channels); if(colorkey) { - get_relevant_argb_components(&ck_conv_info, *(const DWORD*)srcptr, channels); - make_argb_color(&ck_conv_info, channels, &pixel); + get_relevant_argb_components(&ck_conv_info, pixel, channels); + pixel = make_argb_color(&ck_conv_info, channels); if(pixel == colorkey) /* make this pixel transparent */ - *(DWORD *)destptr &= ~conv_info.destmask[0]; + val &= ~conv_info.destmask[0]; } + dword_to_bytes(destptr, val, destformat->bytes_per_pixel); destptr += destformat->bytes_per_pixel; } }
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Alexandre Julliard