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protect against zero-sized windows

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This commit is contained in:
David Rose 2012-01-15 17:56:49 +00:00
parent eb4b58eade
commit 38a73900f1
4 changed files with 18 additions and 2 deletions
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14
panda/src/display/graphicsOutput.I
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@ -296,7 +296,19 @@ has_size() const {
////////////////////////////////////////////////////////////////////
INLINE bool GraphicsOutput::
is_valid() const {
return _is_valid;
return _is_valid && _is_nonzero_size;
}
////////////////////////////////////////////////////////////////////
// Function: GraphicsOutput::is_nonzero_size
// Access: Published
// Description: Returns true if the output has a nonzero size in both
// X and Y, or false if it is zero (and therefore
// invalid).
////////////////////////////////////////////////////////////////////
INLINE bool GraphicsOutput::
is_nonzero_size() const {
return _is_nonzero_size;
}
////////////////////////////////////////////////////////////////////

3
panda/src/display/graphicsOutput.cxx
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@ -97,6 +97,7 @@ GraphicsOutput(GraphicsEngine *engine, GraphicsPipe *pipe,
_y_size = win_prop.get_y_size();
}
_is_valid = false;
_is_nonzero_size = false;
_flip_ready = false;
_cube_map_index = -1;
_cube_map_dr = NULL;
@ -1207,6 +1208,8 @@ set_size_and_recalc(int x, int y) {
_y_size = y;
_has_size = true;
_is_nonzero_size = (_x_size > 0 && _y_size > 0);
int fb_x_size = get_fb_x_size();
int fb_y_size = get_fb_y_size();

2
panda/src/display/graphicsOutput.h
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@ -123,6 +123,7 @@ PUBLISHED:
INLINE int get_sbs_right_y_size() const;
INLINE bool has_size() const;
INLINE bool is_valid() const;
INLINE bool is_nonzero_size() const;
void set_active(bool active);
virtual bool is_active() const;
@ -356,6 +357,7 @@ protected:
int _y_size;
bool _has_size;
bool _is_valid;
bool _is_nonzero_size;
static PStatCollector _make_current_pcollector;
static PStatCollector _copy_texture_pcollector;

1
panda/src/dxgsg9/wdxGraphicsWindow9.cxx
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@ -1168,7 +1168,6 @@ consider_device(wdxGraphicsPipe9 *dxpipe, DXDeviceInfo *device_info) {
////////////////////////////////////////////////////////////////////
bool wdxGraphicsWindow9::
reset_device_resize_window(UINT new_xsize, UINT new_ysize) {
nassertr((new_xsize > 0) && (new_ysize > 0), false);
bool retval = true;
DXScreenData *screen = NULL;