GOB: Add some generic PreGob graphics functions

1 files changed, 59 insertions, 1 deletions

diff --git a/engines/gob/pregob/pregob.cpp b/engines/gob/pregob/pregob.cpp
index ab47adaac6..aea290214c 100644
--- a/engines/gob/pregob/pregob.cpp
+++ b/engines/gob/pregob/pregob.cpp
@@ -21,15 +21,73 @@
  */
 
 #include "gob/gob.h"
+#include "gob/global.h"
+#include "gob/util.h"
+#include "gob/palanim.h"
+#include "gob/draw.h"
+#include "gob/video.h"
 
 #include "gob/pregob/pregob.h"
 
 namespace Gob {
 
-PreGob::PreGob(GobEngine *vm) : _vm(vm) {
+PreGob::PreGob(GobEngine *vm) : _vm(vm), _fadedOut(false) {
 }
 
 PreGob::~PreGob() {
 }
 
+void PreGob::fadeOut() {
+	if (_fadedOut || _vm->shouldQuit())
+		return;
+
+	// Fade to black
+	_vm->_palAnim->fade(0, 0, 0);
+
+	_fadedOut = true;
+}
+
+void PreGob::fadeIn() {
+	if (!_fadedOut || _vm->shouldQuit())
+		return;
+
+	// Fade to palette
+	_vm->_draw->blitInvalidated();
+	_vm->_palAnim->fade(_vm->_global->_pPaletteDesc, 0, 0);
+	_vm->_draw->dirtiedRect(_vm->_draw->_backSurface, 0, 0, 319, 199);
+
+	_fadedOut = false;
+}
+
+void PreGob::clearScreen() {
+	_vm->_draw->_backSurface->clear();
+	_vm->_draw->dirtiedRect(_vm->_draw->_backSurface, 0, 0, 319, 199);
+	_vm->_draw->blitInvalidated();
+	_vm->_video->retrace();
+}
+
+void PreGob::initScreen() {
+	_vm->_util->setFrameRate(15);
+
+	_fadedOut = true;
+
+	_vm->_draw->initScreen();
+
+	_vm->_draw->_backSurface->clear();
+	_vm->_util->clearPalette();
+
+	_vm->_draw->forceBlit();
+	_vm->_video->retrace();
+
+	_vm->_util->processInput();
+}
+
+void PreGob::setPalette(const byte *palette, uint16 size) {
+	memcpy(_vm->_draw->_vgaPalette, palette, 3 * size);
+
+	// If we didn't fade out prior, immediately set the palette
+	if (!_fadedOut)
+		_vm->_video->setFullPalette(_vm->_global->_pPaletteDesc);
+}
+
 } // End of namespace Gob