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Ensures no writes to pixel_pointer_ when allocation has failed.

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This commit is contained in:
Thomas Harte 2019-01-11 22:00:44 -05:00
parent 028e530232
commit ccb52fb625
1 changed files with 68 additions and 65 deletions
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7
Machines/AppleII/Video.hpp
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@ -394,7 +394,6 @@ template <class BusHandler, bool is_iie> class Video: public VideoBase {
static_cast<size_t>(fetch_end - column_),
&base_stream_[static_cast<size_t>(column_)],
&auxiliary_stream_[static_cast<size_t>(column_)]);
// TODO: should character modes be mapped to character pixel outputs here?
}
if(row_ < 192) {
@ -413,7 +412,7 @@ template <class BusHandler, bool is_iie> class Video: public VideoBase {
const int pixel_row = row_ & 7;
const bool is_double = Video::is_double_mode(line_mode);
if(!is_double && was_double_) {
if(!is_double && was_double_ && pixel_pointer_) {
pixel_pointer_[pixel_start*14 + 0] =
pixel_pointer_[pixel_start*14 + 1] =
pixel_pointer_[pixel_start*14 + 2] =
@ -424,6 +423,7 @@ template <class BusHandler, bool is_iie> class Video: public VideoBase {
}
was_double_ = is_double;
if(pixel_pointer_) {
switch(line_mode) {
case GraphicsMode::Text:
output_text(
@ -487,8 +487,10 @@ template <class BusHandler, bool is_iie> class Video: public VideoBase {
default: break;
}
}
if(pixel_end == 40) {
if(pixel_pointer_) {
if(was_double_) {
pixel_pointer_[560] = pixel_pointer_[561] = pixel_pointer_[562] = pixel_pointer_[563] =
pixel_pointer_[564] = pixel_pointer_[565] = pixel_pointer_[566] = pixel_pointer_[567] = 0;
@ -498,6 +500,7 @@ template <class BusHandler, bool is_iie> class Video: public VideoBase {
else
pixel_pointer_[567] = 0;
}
}
crt_.output_data(568, 568);
pixel_pointer_ = nullptr;