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safer PNG handling

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This commit is contained in:
dborth 2009-03-17 06:06:01 +00:00
parent c3a00a0c4c
commit 7800bbce74
2 changed files with 29 additions and 10 deletions
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37
source/ngc/gui/gui_imagedata.cpp
View File

@ -24,16 +24,35 @@ GuiImageData::GuiImageData(const u8 * img)
else
{
PNGUPROP imgProp;
IMGCTX ctx;
IMGCTX ctx = PNGU_SelectImageFromBuffer(img);
ctx = PNGU_SelectImageFromBuffer(img);
PNGU_GetImageProperties (ctx, &imgProp);
width = imgProp.imgWidth;
height = imgProp.imgHeight;
data = (u8 *)memalign (32, imgProp.imgWidth * imgProp.imgHeight * 4);
PNGU_DecodeTo4x4RGBA8 (ctx, imgProp.imgWidth, imgProp.imgHeight, data, 255);
int len = imgProp.imgWidth * imgProp.imgHeight * 4;
DCFlushRange(data, len+len%32);
if(!ctx)
return;
int res = PNGU_GetImageProperties(ctx, &imgProp);
if(res == PNGU_OK)
{
data = (u8 *)memalign (32, imgProp.imgWidth * imgProp.imgHeight * 4);
if(data)
{
res = PNGU_DecodeTo4x4RGBA8 (ctx, imgProp.imgWidth, imgProp.imgHeight, data, 255);
if(res == PNGU_OK)
{
width = imgProp.imgWidth;
height = imgProp.imgHeight;
int len = imgProp.imgWidth * imgProp.imgHeight * 4;
DCFlushRange(data, len+len%32);
}
else
{
free(data);
data = NULL;
}
}
}
PNGU_ReleaseImageContext (ctx);
}
}

2
source/ngc/menu.cpp
View File

@ -3264,7 +3264,7 @@ MainMenu (int menu)
GuiImage logoImgOver(&logoOver);
btnLogo = new GuiButton(logoImg.GetWidth(), logoImg.GetHeight());
btnLogo->SetAlignment(ALIGN_RIGHT, ALIGN_TOP);
btnLogo->SetPosition(-50, 30);
btnLogo->SetPosition(-30, 30);
btnLogo->SetImage(&logoImg);
btnLogo->SetImageOver(&logoImgOver);
btnLogo->SetTrigger(&trigA);