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Detect blank screens by actual screen content, as some games modify LCDC between vblanks.

This commit is contained in:
Lior Halphon 2016-09-30 01:10:50 +03:00
parent 5565c096c7
commit 7bf9cc8f1a
1 changed files with 8 additions and 8 deletions
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14
Tester/main.c
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@ -90,16 +90,16 @@ static void vblank(GB_gameboy_t *gb)
}
if (frames >= test_length ) {
bool is_screen_blank = false;
if (!(gb->io_registers[GB_IO_LCDC] & 0x80)) { /* LCD is off */
is_screen_blank = true;
bool is_screen_blank = true;
for (unsigned i = 160*144; i--;) {
if (bitmap[i] != bitmap[0]) {
is_screen_blank = false;
break;
}
else if(!gb->cgb_mode) { /* BG can't be disabled in CGB mode */
is_screen_blank =!(gb->io_registers[GB_IO_LCDC] & (gb->is_cgb? 3 : 0x23));
}
/* Let the test run for an extra 8 frames if the screen is off/disabled */
if (!is_screen_blank || frames >= test_length + 8) {
/* Let the test run for an extra second if the screen is off/disabled */
if (!is_screen_blank || frames >= test_length + 60) {
FILE *f = fopen(bmp_filename, "wb");
fwrite(&bmp_header, 1, sizeof(bmp_header), f);
fwrite(&bitmap, 1, sizeof(bitmap), f);