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MOHAWK: Added dirty rects support for Myst

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svn-id: r54625
This commit is contained in:
Bastien Bouclet 2010-11-29 20:57:54 +00:00
parent 2ac1fdad32
commit a9617cbe28
2 changed files with 13 additions and 8 deletions
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19
engines/mohawk/graphics.cpp
View File

@ -141,7 +141,6 @@ MystGraphics::MystGraphics(MohawkEngine_Myst* vm) : GraphicsManager(), _vm(vm) {
// Initialize our buffer
_mainScreen = new Graphics::Surface();
_mainScreen->create(_vm->_system->getWidth(), _vm->_system->getHeight(), _pixelFormat.bytesPerPixel);
_dirtyScreen = false;
}
MystGraphics::~MystGraphics() {
@ -277,8 +276,8 @@ void MystGraphics::copyImageSectionToScreen(uint16 image, Common::Rect src, Comm
for (uint16 i = 0; i < height; i++)
memcpy(_mainScreen->getBasePtr(dest.left, i + dest.top), surface->getBasePtr(src.left, top + i), width * surface->bytesPerPixel);
// Mark the screen as dirty
_dirtyScreen = true;
// Add to the list of dirty rects
_dirtyRects.push_back(dest);
}
void MystGraphics::copyImageToScreen(uint16 image, Common::Rect dest) {
@ -286,11 +285,17 @@ void MystGraphics::copyImageToScreen(uint16 image, Common::Rect dest) {
}
void MystGraphics::updateScreen() {
if (_dirtyScreen) {
// Only copy the buffer to the screen if it's dirty
_vm->_system->copyRectToScreen((byte *)_mainScreen->pixels, _mainScreen->pitch, 0, 0, _mainScreen->w, _mainScreen->h);
// Only update the screen if there have been changes since last frame
if (!_dirtyRects.empty()) {
// Copy any modified area
for (uint i = 0; i < _dirtyRects.size(); i++) {
Common::Rect &r = _dirtyRects[i];
_vm->_system->copyRectToScreen((byte *)_mainScreen->getBasePtr(r.left, r.top), _mainScreen->pitch, r.left, r.top, r.width(), r.height());
}
_vm->_system->updateScreen();
_dirtyScreen = false;
_dirtyRects.clear();
}
}

2
engines/mohawk/graphics.h
View File

@ -131,7 +131,7 @@ private:
} _pictureFile;
Graphics::Surface *_mainScreen;
bool _dirtyScreen;
Common::Array<Common::Rect> _dirtyRects;
Graphics::PixelFormat _pixelFormat;
};