qi-hardware/gmenu2x
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Surface: Load image with factory method instead of constructor.

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If loading fails, the factory method returns NULL, while previously the
constructor would create a Surface object with a NULL "raw" field.
However, since most of the methods dereference "raw" without checking,
such a Surface would likely crash the application when used.
This commit is contained in:
Maarten ter Huurne 2011-06-02 22:09:03 +02:00
parent 0a9229ff3f
commit 52f4686e4a
5 changed files with 59 additions and 48 deletions
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37
src/gmenu2x.cpp
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@ -351,7 +351,7 @@ void GMenu2X::initBG() {
bg->box(0,0,resX,resY,0,0,0);
} else {
// Note: Copy constructor converts to display format.
bg = new Surface(Surface(confStr["wallpaper"]));
bg = new Surface(Surface::loadImage(confStr["wallpaper"]));
}
drawTopBar(bg);
@ -360,37 +360,46 @@ void GMenu2X::initBG() {
Surface *bgmain = new Surface(bg);
sc.add(bgmain,"bgmain");
Surface sd("imgs/sd.png", confStr["skin"]);
Surface cpu("imgs/cpu.png", confStr["skin"]);
Surface volume("imgs/volume.png", confStr["skin"]);
Surface *sd = Surface::loadImage("imgs/sd.png", confStr["skin"]);
if (sd) sd->blit(sc["bgmain"], 3, bottomBarIconY);
string df = getDiskFree();
sc["bgmain"]->write(font, df, 22, bottomBarTextY, ASFont::HAlignLeft, ASFont::VAlignMiddle);
free(sd);
sd.blit( sc["bgmain"], 3, bottomBarIconY );
sc["bgmain"]->write( font, df, 22, bottomBarTextY, ASFont::HAlignLeft, ASFont::VAlignMiddle );
Surface *volume = Surface::loadImage("imgs/volume.png", confStr["skin"]);
volumeX = 27+font->getTextWidth(df);
volume.blit( sc["bgmain"], volumeX, bottomBarIconY );
if (volume) volume->blit(sc["bgmain"], volumeX, bottomBarIconY);
volumeX += 19;
free(volume);
Surface *cpu = Surface::loadImage("imgs/cpu.png", confStr["skin"]);
cpuX = volumeX+font->getTextWidth("100")+5;
cpu.blit( sc["bgmain"], cpuX, bottomBarIconY );
if (cpu) cpu->blit(sc["bgmain"], cpuX, bottomBarIconY);
cpuX += 19;
manualX = cpuX+font->getTextWidth("300Mhz")+5;
free(cpu);
int serviceX = resX-38;
if (usbnet) {
if (web) {
Surface webserver("imgs/webserver.png", confStr["skin"]);
webserver.blit( sc["bgmain"], serviceX, bottomBarIconY );
Surface *webserver = Surface::loadImage(
"imgs/webserver.png", confStr["skin"]);
if (webserver) webserver->blit(sc["bgmain"], serviceX, bottomBarIconY);
serviceX -= 19;
free(webserver);
}
if (samba) {
Surface sambaS("imgs/samba.png", confStr["skin"]);
sambaS.blit( sc["bgmain"], serviceX, bottomBarIconY );
Surface *sambaS = Surface::loadImage(
"imgs/samba.png", confStr["skin"]);
if (sambaS) sambaS->blit(sc["bgmain"], serviceX, bottomBarIconY);
serviceX -= 19;
free(sambaS);
}
if (inet) {
Surface inetS("imgs/inet.png", confStr["skin"]);
inetS.blit( sc["bgmain"], serviceX, bottomBarIconY );
Surface *inetS = Surface::loadImage("imgs/inet.png", confStr["skin"]);
if (inetS) inetS->blit(sc["bgmain"], serviceX, bottomBarIconY);
serviceX -= 19;
free(inetS);
}
}
}

11
src/linkapp.cpp
View File

@ -300,14 +300,17 @@ void LinkApp::showManual() {
//Raise the clock to speed-up the loading of the manual
gmenu2x->setClock(336);
Surface pngman(manual);
Surface *pngman = Surface::loadImage(manual);
if (!pngman) {
return;
}
// Note: Copy constructor converts to display format.
Surface bg(Surface(gmenu2x->confStr["wallpaper"]));
Surface bg(Surface::loadImage(gmenu2x->confStr["wallpaper"]));
stringstream ss;
string pageStatus;
bool close = false, repaint = true;
int page=0, pagecount=pngman.raw->w/320;
int page=0, pagecount=pngman->raw->w/320;
ss << pagecount;
string spagecount;
@ -319,7 +322,7 @@ void LinkApp::showManual() {
while (!close) {
if (repaint) {
bg.blit(gmenu2x->s, 0, 0);
pngman.blit(gmenu2x->s, -page*320, 0);
pngman->blit(gmenu2x->s, -page*320, 0);
gmenu2x->drawBottomBar();
gmenu2x->drawButton(gmenu2x->s, "x", gmenu2x->tr["Exit"],

45
src/surface.cpp
View File

@ -44,10 +44,31 @@ Surface *Surface::openOutputSurface(int width, int height, int bitsperpixel) {
return raw ? new Surface(raw, false) : NULL;
}
Surface *Surface::loadImage(const string &img, const string &skin) {
string skinpath;
if (!skin.empty() && !img.empty() && img[0]!='/') {
skinpath = "skins/"+skin+"/"+img;
if (!fileExists(skinpath))
skinpath = "skins/Default/"+img;
} else {
skinpath = img;
}
SDL_Surface *raw = loadPNG(skinpath);
if (!raw) {
ERROR("Couldn't load surface '%s'\n", img.c_str());
return NULL;
}
return new Surface(raw, true);
}
Surface::Surface(SDL_Surface *raw_, bool freeWhenDone_)
: raw(raw_)
, freeWhenDone(freeWhenDone_)
{
halfW = raw->w/2;
halfH = raw->h/2;
}
Surface::Surface(Surface *s) {
@ -57,14 +78,6 @@ Surface::Surface(Surface *s) {
halfH = raw->h/2;
}
Surface::Surface(const string &img, const string &skin) {
raw = NULL;
load(img, skin);
freeWhenDone = (raw != NULL);
halfW = raw->w/2;
halfH = raw->h/2;
}
Surface::~Surface() {
if (freeWhenDone) {
SDL_FreeSurface(raw);
@ -78,22 +91,6 @@ SDL_PixelFormat *Surface::format() {
return raw->format;
}
void Surface::load(const string &img, const string &skin) {
string skinpath;
if (!skin.empty() && !img.empty() && img[0]!='/') {
skinpath = "skins/"+skin+"/"+img;
if (!fileExists(skinpath))
skinpath = "skins/Default/"+img;
} else {
skinpath = img;
}
raw = loadPNG(skinpath);
if (!raw) {
ERROR("Couldn't load surface '%s'\n", img.c_str());
}
}
void Surface::flip() {
SDL_Flip(raw);
}

3
src/surface.h
View File

@ -40,9 +40,9 @@ RGBAColor strtorgba(const string &strColor);
class Surface {
public:
static Surface *openOutputSurface(int width, int height, int bitsperpixel);
static Surface *loadImage(const string &img, const string &skin="");
Surface(Surface *s);
Surface(const string &img, const string &skin="");
~Surface();
SDL_Surface *raw;
@ -74,7 +74,6 @@ public:
private:
Surface(SDL_Surface *raw, bool freeWhenDone);
SDL_PixelFormat *format();
void load(const string &img, const string &skin);
bool blit(SDL_Surface *destination, int x, int y, int w=0, int h=0, int a=-1);
bool blitCenter(SDL_Surface *destination, int x, int y, int w=0, int h=0, int a=-1);
bool blitRight(SDL_Surface *destination, int x, int y, int w=0, int h=0, int a=-1);

11
src/surfacecollection.cpp
View File

@ -80,8 +80,10 @@ Surface *SurfaceCollection::add(const string &path) {
return NULL;
} else if (!fileExists(filePath)) return NULL;
Surface *s = new Surface(filePath);
surfaces[path] = s;
Surface *s = Surface::loadImage(filePath);
if (s != NULL) {
surfaces[path] = s;
}
return s;
}
@ -94,9 +96,10 @@ Surface *SurfaceCollection::addSkinRes(const string &path) {
string skinpath = getSkinFilePath(path);
if (skinpath.empty())
return NULL;
Surface *s = new Surface(skinpath);
if (s != NULL)
Surface *s = Surface::loadImage(skinpath);
if (s != NULL) {
surfaces[path] = s;
}
return s;
}