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author | Colin Snover | 2016-03-08 10:27:15 -0600 |
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committer | Colin Snover | 2016-03-08 10:29:05 -0600 |
commit | a2e9cc4965340add73db19c3d602ef5a910fe336 (patch) | |
tree | dbbefd6633a3994828819ad6998f9cc79635e8e3 /engines/sci/graphics | |
parent | ea3f2ba60eae1eaeebec86662e6ccaee51a60657 (diff) | |
download | scummvm-rg350-a2e9cc4965340add73db19c3d602ef5a910fe336.tar.gz scummvm-rg350-a2e9cc4965340add73db19c3d602ef5a910fe336.tar.bz2 scummvm-rg350-a2e9cc4965340add73db19c3d602ef5a910fe336.zip |
SCI32: Clean up kIsOnMe and fix rounding bug
The implementation was not correctly rounding the scaled position
with mulru, leading to occasionally incorrect hit detection at
the boundaries of boxes.
Diffstat (limited to 'engines/sci/graphics')
-rw-r--r-- | engines/sci/graphics/frameout.cpp | 80 | ||||
-rw-r--r-- | engines/sci/graphics/frameout.h | 13 | ||||
-rw-r--r-- | engines/sci/graphics/screen_item32.cpp | 2 | ||||
-rw-r--r-- | engines/sci/graphics/screen_item32.h | 4 |
4 files changed, 45 insertions, 54 deletions
diff --git a/engines/sci/graphics/frameout.cpp b/engines/sci/graphics/frameout.cpp index 329b680f17..655e59de00 100644 --- a/engines/sci/graphics/frameout.cpp +++ b/engines/sci/graphics/frameout.cpp @@ -1977,73 +1977,55 @@ void GfxFrameout::kernelFrameOut(const bool shouldShowBits) { } } -uint16 GfxFrameout::kernelIsOnMe(int16 x, int16 y, uint16 checkPixels, reg_t screenObject) { - reg_t planeObject = readSelector(_segMan, screenObject, SELECTOR(plane)); - Plane *screenItemPlane = _visiblePlanes.findByObject(planeObject); // Search for plane in visible planes - ScreenItem *screenItem = nullptr; +#pragma mark - +#pragma mark Mouse cursor - if (!screenItemPlane) { - // Specified plane not found - return 0; +reg_t GfxFrameout::kernelIsOnMe(const reg_t object, const Common::Point &position, bool checkPixel) const { + reg_t planeObject = readSelector(_segMan, object, SELECTOR(plane)); + Plane *plane = _visiblePlanes.findByObject(planeObject); + if (plane == nullptr) { + return make_reg(0, 0); } - screenItem = screenItemPlane->_screenItemList.findByObject(screenObject); - if (!screenItem) { - // Specified screen object not in item list - return 0; + ScreenItem *screenItem = plane->_screenItemList.findByObject(object); + if (screenItem == nullptr) { + return make_reg(0, 0); } - // Original SCI32 seems to have made a copy (?) of the screenitem? - // there is also a "or [ebp+arg_56], 1 - not sure what that did - return isOnMe(screenItemPlane, screenItem, x, y, checkPixels); + return make_reg(0, isOnMe(*screenItem, *plane, position, checkPixel)); } -uint16 GfxFrameout::isOnMe(Plane *screenItemPlane, ScreenItem *screenItem, int16 x, int16 y, uint16 checkPixels) { - // adjust coordinate according to resolution - int32 adjustedX = x * getCurrentBuffer().screenWidth / getCurrentBuffer().scriptWidth; - int32 adjustedY = y * getCurrentBuffer().screenHeight / getCurrentBuffer().scriptHeight; - - adjustedX += screenItemPlane->_planeRect.left; - adjustedY += screenItemPlane->_planeRect.top; +bool GfxFrameout::isOnMe(const ScreenItem &screenItem, const Plane &plane, const Common::Point &position, const bool checkPixel) const { - //warning("kIsOnMe %s %d (%d, %d -> %d, %d) mouse %d, %d", _segMan->getObjectName(screenObject), checkPixels, screenItem->_screenRect.left, screenItem->_screenRect.top, screenItem->_screenRect.right, screenItem->_screenRect.bottom, adjustedX, adjustedY); + Common::Point scaledPosition(position); + mulru(scaledPosition, Ratio(_currentBuffer.screenWidth, _currentBuffer.scriptWidth), Ratio(_currentBuffer.screenHeight, _currentBuffer.scriptHeight)); + scaledPosition.x += plane._planeRect.left; + scaledPosition.y += plane._planeRect.top; - if (!screenItem->_screenRect.contains(adjustedX, adjustedY)) { - // Specified coordinates are not within screen item - return 0; + if (!screenItem._screenRect.contains(scaledPosition)) { + return false; } - //warning("HIT!"); - if (checkPixels) { - //warning("Check Pixels"); - CelObj &screenItemCelObject = screenItem->getCelObj(); + if (checkPixel) { + CelObj &celObj = screenItem.getCelObj(); - Common::Point celAdjustedPoint(adjustedX, adjustedY); - bool celMirrored = screenItem->_mirrorX ^ screenItemCelObject._mirrorX; + bool mirrorX = screenItem._mirrorX ^ celObj._mirrorX; - celAdjustedPoint.x -= screenItem->_scaledPosition.x; - celAdjustedPoint.y -= screenItem->_scaledPosition.y; + scaledPosition.x -= screenItem._scaledPosition.x; + scaledPosition.y -= screenItem._scaledPosition.y; - Ratio celAdjustXRatio(screenItemCelObject._scaledWidth, getCurrentBuffer().screenWidth); - Ratio celAdjustYRatio(screenItemCelObject._scaledHeight, getCurrentBuffer().screenHeight); - mulru(celAdjustedPoint, celAdjustXRatio, celAdjustYRatio); + mulru(scaledPosition, Ratio(celObj._scaledWidth, _currentBuffer.screenWidth), Ratio(celObj._scaledHeight, _currentBuffer.screenHeight)); - if ((screenItem->_scale.signal) && (screenItem->_scale.x) && (screenItem->_scale.y)) { - // Apply scaling - celAdjustedPoint.x = celAdjustedPoint.x * 128 / screenItem->_scale.x; - celAdjustedPoint.y = celAdjustedPoint.y * 128 / screenItem->_scale.y; + if (screenItem._scale.signal != kScaleSignalNone && screenItem._scale.x && screenItem._scale.y) { + scaledPosition.x = scaledPosition.x * 128 / screenItem._scale.x; + scaledPosition.y = scaledPosition.y * 128 / screenItem._scale.y; } - byte coordinateColor = screenItemCelObject.readPixel(celAdjustedPoint.x, celAdjustedPoint.y, celMirrored); - byte transparentColor = screenItemCelObject._transparentColor; - - if (coordinateColor == transparentColor) { - // Coordinate is transparent - //warning("TRANSPARENT!"); - return 0; - } + uint8 pixel = celObj.readPixel(scaledPosition.x, scaledPosition.y, mirrorX); + return pixel != celObj._transparentColor; } - return 1; + + return true; } #pragma mark - diff --git a/engines/sci/graphics/frameout.h b/engines/sci/graphics/frameout.h index 2931fc090b..f864abc5bc 100644 --- a/engines/sci/graphics/frameout.h +++ b/engines/sci/graphics/frameout.h @@ -502,8 +502,17 @@ public: return 1; }; - uint16 kernelIsOnMe(int16 x, int16 y, uint16 checkPixels, reg_t screenObject); - uint16 isOnMe(Plane *screenItemPlane, ScreenItem *screenItem, int16 x, int16 y, uint16 checkPixels); +#pragma mark - +#pragma mark Mouse cursor +private: + /** + * Determines whether or not the point given by + * `position` is inside of the given screen item. + */ + bool isOnMe(const ScreenItem &screenItem, const Plane &plane, const Common::Point &position, const bool checkPixel) const; + +public: + reg_t kernelIsOnMe(const reg_t object, const Common::Point &position, const bool checkPixel) const; #pragma mark - #pragma mark Debugging diff --git a/engines/sci/graphics/screen_item32.cpp b/engines/sci/graphics/screen_item32.cpp index f3f397d632..138a0e47b0 100644 --- a/engines/sci/graphics/screen_item32.cpp +++ b/engines/sci/graphics/screen_item32.cpp @@ -399,7 +399,7 @@ void ScreenItem::calcRects(const Plane &plane) { } } -CelObj &ScreenItem::getCelObj() { +CelObj &ScreenItem::getCelObj() const { if (_celObj == nullptr) { switch (_celInfo.type) { case kCelTypeView: diff --git a/engines/sci/graphics/screen_item32.h b/engines/sci/graphics/screen_item32.h index 0840570721..06e1f6072f 100644 --- a/engines/sci/graphics/screen_item32.h +++ b/engines/sci/graphics/screen_item32.h @@ -125,7 +125,7 @@ public: * item. This member is populated by calling * `getCelObj`. */ - CelObj *_celObj; + mutable CelObj *_celObj; /** * If set, the priority for this screen item is fixed @@ -250,7 +250,7 @@ public: * screen item. If a cel object does not already exist, * one will be created and assigned. */ - CelObj &getCelObj(); + CelObj &getCelObj() const; void printDebugInfo(Console *con) const; |