diff options
Diffstat (limited to 'engines/lab/graphics.cpp')
| -rw-r--r-- | engines/lab/graphics.cpp | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/engines/lab/graphics.cpp b/engines/lab/graphics.cpp index babc5502dd..52f92e5b9e 100644 --- a/engines/lab/graphics.cpp +++ b/engines/lab/graphics.cpp @@ -53,6 +53,7 @@ DisplayMan::DisplayMan(LabEngine *vm) : _vm(vm) { _displayBuffer = nullptr; _currentDisplayBuffer = nullptr; _tempScrollData = nullptr; + FadePalette = nullptr; _screenWidth = 0; _screenHeight = 0; @@ -1164,4 +1165,36 @@ void DisplayMan::scrollDisplayY(int16 dy, uint16 x1, uint16 y1, uint16 x2, uint1 rectFill(x1, y1, x2, y1 + dy - 1); } +/*****************************************************************************/ +/* Does the fading of the Palette on the screen. */ +/*****************************************************************************/ +uint16 DisplayMan::fadeNumIn(uint16 num, uint16 res, uint16 counter) { + return (num - ((((int32)(15 - counter)) * ((int32)(num - res))) / 15)); +} + + +uint16 DisplayMan::fadeNumOut(uint16 num, uint16 res, uint16 counter) { + return (num - ((((int32) counter) * ((int32)(num - res))) / 15)); +} + +void DisplayMan::fade(bool fadein, uint16 res) { + uint16 newpal[16]; + + for (uint16 i = 0; i < 16; i++) { + for (uint16 palIdx = 0; palIdx < 16; palIdx++) { + if (fadein) + newpal[palIdx] = (0x00F & fadeNumIn(0x00F & FadePalette[palIdx], 0x00F & res, i)) + + (0x0F0 & fadeNumIn(0x0F0 & FadePalette[palIdx], 0x0F0 & res, i)) + + (0xF00 & fadeNumIn(0xF00 & FadePalette[palIdx], 0xF00 & res, i)); + else + newpal[palIdx] = (0x00F & fadeNumOut(0x00F & FadePalette[palIdx], 0x00F & res, i)) + + (0x0F0 & fadeNumOut(0x0F0 & FadePalette[palIdx], 0x0F0 & res, i)) + + (0xF00 & fadeNumOut(0xF00 & FadePalette[palIdx], 0xF00 & res, i)); + } + + g_lab->_graphics->setAmigaPal(newpal, 16); + g_lab->waitTOF(); + g_lab->_music->updateMusic(); + } +} } // End of namespace Lab |