diff options
author | Colin Snover | 2017-10-05 23:02:49 -0500 |
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committer | Colin Snover | 2017-10-06 22:10:51 -0500 |
commit | 9d05bf79208fac113b81531996cead6521efa6fe (patch) | |
tree | 098c864e56b286ae72618843336a925fe536bc9a /engines | |
parent | ff3503abdee09fcd35d86297dfb79879d0ecc8b8 (diff) | |
download | scummvm-rg350-9d05bf79208fac113b81531996cead6521efa6fe.tar.gz scummvm-rg350-9d05bf79208fac113b81531996cead6521efa6fe.tar.bz2 scummvm-rg350-9d05bf79208fac113b81531996cead6521efa6fe.zip |
SCI32: Clean up GfxCursor32
* Rewrap doxygen comments to 80 columns
* Renamings for clarity
* Deduplicate copy/paint code
Diffstat (limited to 'engines')
-rw-r--r-- | engines/sci/graphics/cursor32.cpp | 182 | ||||
-rw-r--r-- | engines/sci/graphics/cursor32.h | 140 |
2 files changed, 139 insertions, 183 deletions
diff --git a/engines/sci/graphics/cursor32.cpp b/engines/sci/graphics/cursor32.cpp index 74fbafa2f0..ae8c01495c 100644 --- a/engines/sci/graphics/cursor32.cpp +++ b/engines/sci/graphics/cursor32.cpp @@ -34,22 +34,22 @@ namespace Sci { GfxCursor32::GfxCursor32() : _hideCount(0), _position(0, 0), - _writeToVMAP(false) { + _needsPaint(false) { } -void GfxCursor32::init(const Buffer &vmap) { - _vmap = vmap; - _vmapRegion.rect = Common::Rect(_vmap.screenWidth, _vmap.screenHeight); - _vmapRegion.data = (byte *)_vmap.getPixels(); - _restrictedArea = _vmapRegion.rect; +void GfxCursor32::init(const Buffer &outputBuffer) { + _screen = outputBuffer; + _screenRegion.rect = Common::Rect(_screen.screenWidth, _screen.screenHeight); + _screenRegion.data = static_cast<byte *>(_screen.getPixels()); + _restrictedArea = _screenRegion.rect; } GfxCursor32::~GfxCursor32() { free(_cursor.data); free(_cursorBack.data); - free(_drawBuff1.data); - free(_drawBuff2.data); - free(_savedVmapRegion.data); + free(_scratch1.data); + free(_scratch2.data); + free(_savedScreenRegion.data); } void GfxCursor32::hide() { @@ -58,25 +58,26 @@ void GfxCursor32::hide() { } if (!_cursorBack.rect.isEmpty()) { - drawToHardware(_cursorBack); + drawToScreen(_cursorBack); } } void GfxCursor32::revealCursor() { _cursorBack.rect = _cursor.rect; - _cursorBack.rect.clip(_vmapRegion.rect); + _cursorBack.rect.clip(_screenRegion.rect); if (_cursorBack.rect.isEmpty()) { return; } - readVideo(_cursorBack); - _drawBuff1.rect = _cursor.rect; - copy(_drawBuff1, _cursorBack); - paint(_drawBuff1, _cursor); - drawToHardware(_drawBuff1); + copyFromScreen(_cursorBack); + _scratch1.rect = _cursor.rect; + copy<false>(_scratch1, _cursorBack); + copy<true>(_scratch1, _cursor); + drawToScreen(_scratch1); } -void GfxCursor32::paint(DrawRegion &target, const DrawRegion &source) { +template <bool SKIP> +void GfxCursor32::copy(DrawRegion &target, const DrawRegion &source) { if (source.rect.isEmpty()) { return; } @@ -96,25 +97,33 @@ void GfxCursor32::paint(DrawRegion &target, const DrawRegion &source) { const byte *sourcePixel = source.data + (sourceYOffset * source.rect.width()) + sourceXOffset; const uint8 skipColor = source.skipColor; - const int16 sourceStride = source.rect.width() - drawRectWidth; - const int16 targetStride = target.rect.width() - drawRectWidth; + int16 sourceStride = source.rect.width(); + int16 targetStride = target.rect.width(); + if (SKIP) { + sourceStride -= drawRectWidth; + targetStride -= drawRectWidth; + } for (int16 y = 0; y < drawRectHeight; ++y) { - for (int16 x = 0; x < drawRectWidth; ++x) { - if (*sourcePixel != skipColor) { - *targetPixel = *sourcePixel; + if (SKIP) { + for (int16 x = 0; x < drawRectWidth; ++x) { + if (*sourcePixel != skipColor) { + *targetPixel = *sourcePixel; + } + ++targetPixel; + ++sourcePixel; } - ++targetPixel; - ++sourcePixel; + } else { + memcpy(targetPixel, sourcePixel, drawRectWidth); } - sourcePixel += sourceStride; targetPixel += targetStride; + sourcePixel += sourceStride; } } -void GfxCursor32::drawToHardware(const DrawRegion &source) { +void GfxCursor32::drawToScreen(const DrawRegion &source) { Common::Rect drawRect(source.rect); - drawRect.clip(_vmapRegion.rect); + drawRect.clip(_screenRegion.rect); const int16 sourceXOffset = drawRect.left - source.rect.left; const int16 sourceYOffset = drawRect.top - source.rect.top; byte *sourcePixel = source.data + (sourceYOffset * source.rect.width()) + sourceXOffset; @@ -174,7 +183,7 @@ void GfxCursor32::setRestrictedArea(const Common::Rect &rect) { } void GfxCursor32::clearRestrictedArea() { - _restrictedArea = _vmapRegion.rect; + _restrictedArea = _screenRegion.rect; } void GfxCursor32::setView(const GuiResourceId viewId, const int16 loopNo, const int16 celNo) { @@ -279,58 +288,29 @@ void GfxCursor32::setView(const GuiResourceId viewId, const int16 loopNo, const _cursor.rect = Common::Rect(_width, _height); *_cursor.data = _cursor.skipColor; _cursorBack.rect = _cursor.rect; - _cursorBack.rect.clip(_vmapRegion.rect); + _cursorBack.rect.clip(_screenRegion.rect); if (!_cursorBack.rect.isEmpty()) { - readVideo(_cursorBack); + copyFromScreen(_cursorBack); } } _cursorBack.data = (byte *)realloc(_cursorBack.data, _width * _height); memset(_cursorBack.data, 0, _width * _height); - _drawBuff1.data = (byte *)realloc(_drawBuff1.data, _width * _height); - _drawBuff2.data = (byte *)realloc(_drawBuff2.data, _width * _height * 4); - _savedVmapRegion.data = (byte *)realloc(_savedVmapRegion.data, _width * _height); + _scratch1.data = (byte *)realloc(_scratch1.data, _width * _height); + _scratch2.data = (byte *)realloc(_scratch2.data, _width * _height * 4); + _savedScreenRegion.data = (byte *)realloc(_savedScreenRegion.data, _width * _height); unhide(); } -void GfxCursor32::readVideo(DrawRegion &target) { - // NOTE: In SSCI, mouse events were received via hardware interrupt, so - // there was a separate branch here that would read from VRAM instead of - // from the game's back buffer when a mouse event was received while the - // back buffer was being updated. In ScummVM, mouse events are polled, which - // means it is not possible to receive a mouse event during a back buffer - // update, so the code responsible for handling that is removed. - copy(target, _vmapRegion); -} - -void GfxCursor32::copy(DrawRegion &target, const DrawRegion &source) { - if (source.rect.isEmpty()) { - return; - } - - Common::Rect drawRect(source.rect); - drawRect.clip(target.rect); - if (drawRect.isEmpty()) { - return; - } - - const int16 sourceXOffset = drawRect.left - source.rect.left; - const int16 sourceYOffset = drawRect.top - source.rect.top; - const int16 drawWidth = drawRect.width(); - const int16 drawHeight = drawRect.height(); - - byte *targetPixel = target.data + ((drawRect.top - target.rect.top) * target.rect.width()) + (drawRect.left - target.rect.left); - const byte *sourcePixel = source.data + (sourceYOffset * source.rect.width()) + sourceXOffset; - - const int16 sourceStride = source.rect.width(); - const int16 targetStride = target.rect.width(); - - for (int y = 0; y < drawHeight; ++y) { - memcpy(targetPixel, sourcePixel, drawWidth); - targetPixel += targetStride; - sourcePixel += sourceStride; - } +void GfxCursor32::copyFromScreen(DrawRegion &target) { + // In SSCI, mouse events were received via hardware interrupt, so there was + // a separate branch here that would read from VRAM instead of from the + // game's back buffer when a mouse event was received while the back buffer + // was being updated. In ScummVM, mouse events are polled, which means it is + // not possible to receive a mouse event during a back buffer update, so the + // code responsible for handling that is removed. + copy<false>(target, _screenRegion); } void GfxCursor32::setPosition(const Common::Point &position) { @@ -349,32 +329,32 @@ void GfxCursor32::setPosition(const Common::Point &position) { } void GfxCursor32::gonnaPaint(Common::Rect paintRect) { - if (!_hideCount && !_writeToVMAP && !_cursorBack.rect.isEmpty()) { + if (!_hideCount && !_needsPaint && !_cursorBack.rect.isEmpty()) { paintRect.left &= ~3; paintRect.right |= 3; if (_cursorBack.rect.intersects(paintRect)) { - _writeToVMAP = true; + _needsPaint = true; } } } void GfxCursor32::paintStarting() { - if (_writeToVMAP) { - _savedVmapRegion.rect = _cursor.rect; - copy(_savedVmapRegion, _vmapRegion); - paint(_vmapRegion, _cursor); + if (_needsPaint) { + _savedScreenRegion.rect = _cursor.rect; + copy<false>(_savedScreenRegion, _screenRegion); + copy<true>(_screenRegion, _cursor); } } void GfxCursor32::donePainting() { - if (_writeToVMAP) { - copy(_vmapRegion, _savedVmapRegion); - _savedVmapRegion.rect = Common::Rect(); - _writeToVMAP = false; + if (_needsPaint) { + copy<false>(_screenRegion, _savedScreenRegion); + _savedScreenRegion.rect = Common::Rect(); + _needsPaint = false; } if (!_hideCount && !_cursorBack.rect.isEmpty()) { - copy(_cursorBack, _vmapRegion); + copy<false>(_cursorBack, _screenRegion); } } @@ -423,45 +403,45 @@ void GfxCursor32::move() { } // Cursor moved offscreen - if (!_cursor.rect.intersects(_vmapRegion.rect)) { - drawToHardware(_cursorBack); + if (!_cursor.rect.intersects(_screenRegion.rect)) { + drawToScreen(_cursorBack); return; } if (!_cursor.rect.intersects(_cursorBack.rect)) { // Cursor moved to a completely different part of the screen - _drawBuff1.rect = _cursor.rect; - _drawBuff1.rect.clip(_vmapRegion.rect); - readVideo(_drawBuff1); + _scratch1.rect = _cursor.rect; + _scratch1.rect.clip(_screenRegion.rect); + copyFromScreen(_scratch1); - _drawBuff2.rect = _drawBuff1.rect; - copy(_drawBuff2, _drawBuff1); + _scratch2.rect = _scratch1.rect; + copy<false>(_scratch2, _scratch1); - paint(_drawBuff1, _cursor); - drawToHardware(_drawBuff1); + copy<true>(_scratch1, _cursor); + drawToScreen(_scratch1); - drawToHardware(_cursorBack); + drawToScreen(_cursorBack); _cursorBack.rect = _cursor.rect; - _cursorBack.rect.clip(_vmapRegion.rect); - copy(_cursorBack, _drawBuff2); + _cursorBack.rect.clip(_screenRegion.rect); + copy<false>(_cursorBack, _scratch2); } else { // Cursor moved, but still overlaps the previous cursor location Common::Rect mergedRect(_cursorBack.rect); mergedRect.extend(_cursor.rect); - mergedRect.clip(_vmapRegion.rect); + mergedRect.clip(_screenRegion.rect); - _drawBuff2.rect = mergedRect; - readVideo(_drawBuff2); + _scratch2.rect = mergedRect; + copyFromScreen(_scratch2); - copy(_drawBuff2, _cursorBack); + copy<false>(_scratch2, _cursorBack); _cursorBack.rect = _cursor.rect; - _cursorBack.rect.clip(_vmapRegion.rect); - copy(_cursorBack, _drawBuff2); + _cursorBack.rect.clip(_screenRegion.rect); + copy<false>(_cursorBack, _scratch2); - paint(_drawBuff2, _cursor); - drawToHardware(_drawBuff2); + copy<true>(_scratch2, _cursor); + drawToScreen(_scratch2); } } diff --git a/engines/sci/graphics/cursor32.h b/engines/sci/graphics/cursor32.h index 562a2c50de..fb07c49dbb 100644 --- a/engines/sci/graphics/cursor32.h +++ b/engines/sci/graphics/cursor32.h @@ -23,6 +23,7 @@ #ifndef SCI_GRAPHICS_CURSOR32_H #define SCI_GRAPHICS_CURSOR32_H +#include "common/array.h" // for Array #include "common/rect.h" // for Point, Rect #include "common/scummsys.h" // for int16, byte, uint8 #include "common/serializer.h" // for Serializable, Serializer (ptr only) @@ -37,11 +38,10 @@ public: ~GfxCursor32(); /** - * Initialises the cursor system with the given - * buffer to use as the output buffer for - * rendering the cursor. + * Initialises the cursor system with the given buffer to use as the output + * buffer for rendering the cursor. */ - void init(const Buffer &vmap); + void init(const Buffer &outputBuffer); /** * Called when the hardware mouse moves. @@ -49,41 +49,35 @@ public: bool deviceMoved(Common::Point &position); /** - * Called by GfxFrameout once for each show - * rectangle that is going to be drawn to - * hardware. + * Called by GfxFrameout once for each show rectangle that is going to be + * drawn to hardware. */ void gonnaPaint(Common::Rect paintRect); /** - * Called by GfxFrameout when the rendering to - * hardware begins. + * Called by GfxFrameout when the rendering to hardware begins. */ void paintStarting(); /** - * Called by GfxFrameout when the output buffer - * has finished rendering to hardware. + * Called by GfxFrameout when the output buffer has finished rendering to + * hardware. */ void donePainting(); /** - * Hides the cursor. Each call to `hide` will - * increment a hide counter, which must be - * returned to 0 before the cursor will be - * shown again. + * Hides the cursor. Each call to `hide` will increment a hide counter, + * which must be returned to 0 before the cursor will be shown again. */ void hide(); /** - * Shows the cursor, if the hide counter is - * returned to 0. + * Shows the cursor, if the hide counter is returned to 0. */ void unhide(); /** - * Shows the cursor regardless of the state of - * the hide counter. + * Shows the cursor regardless of the state of the hide counter. */ void show(); @@ -93,14 +87,12 @@ public: void setView(const GuiResourceId viewId, const int16 loopNo, const int16 celNo); /** - * Explicitly sets the position of the cursor, - * in game script coordinates. + * Explicitly sets the position of the cursor, in game script coordinates. */ void setPosition(const Common::Point &position); /** - * Sets the region that the mouse is allowed - * to move within. + * Sets the region that the mouse is allowed to move within. */ void setRestrictedArea(const Common::Rect &rect); @@ -109,10 +101,6 @@ public: */ void clearRestrictedArea(); -#ifdef ENABLE_SCI32_MAC - void setMacCursorRemapList(int cursorCount, reg_t *cursors); -#endif - virtual void saveLoadWithSerializer(Common::Serializer &ser); private: @@ -121,42 +109,41 @@ private: byte *data; uint8 skipColor; - DrawRegion() : rect(), data(nullptr) {} + DrawRegion() : data(nullptr) {} }; /** - * Information about the current cursor. - * Used to restore cursor when loading a - * savegame. + * Information about the current cursor. Used to restore cursor when loading + * a savegame. */ CelInfo32 _cursorInfo; /** - * Content behind the cursor? TODO + * The content of the frame buffer which was behind the cursor prior to its + * being drawn. */ DrawRegion _cursorBack; /** * Scratch buffer. */ - DrawRegion _drawBuff1; + DrawRegion _scratch1; /** * Scratch buffer 2. */ - DrawRegion _drawBuff2; + DrawRegion _scratch2; /** - * A draw region representing the current - * output buffer. + * A draw region representing the entire output buffer. */ - DrawRegion _vmapRegion; + DrawRegion _screenRegion; /** - * The content behind the cursor in the + * The region behind the cursor immediately before it is painted to the * output buffer. */ - DrawRegion _savedVmapRegion; + DrawRegion _savedScreenRegion; /** * The cursor bitmap. @@ -164,93 +151,82 @@ private: DrawRegion _cursor; /** - * The width and height of the cursor, - * in screen coordinates. + * The width and height of the cursor, in screen coordinates. */ int16 _width, _height; /** - * The output buffer where the cursor is - * rendered. + * The output buffer where the cursor is rendered. */ - Buffer _vmap; + Buffer _screen; /** - * The number of times the cursor has been - * hidden. + * The number of times the cursor has been hidden. */ int _hideCount; /** - * The rendered position of the cursor, in - * screen coordinates. + * The rendered position of the cursor, in screen coordinates. */ Common::Point _position; /** - * The position of the cursor hot spot, relative - * to the cursor origin, in screen pixels. + * The position of the cursor hot spot, relative to the cursor origin, in + * screen pixels. */ Common::Point _hotSpot; /** - * The area within which the cursor is allowed - * to move, in screen pixels. + * The area within which the cursor is allowed to move, in screen pixels. */ Common::Rect _restrictedArea; /** - * Indicates whether or not the cursor needs to - * be repainted on the output buffer due to a - * change of graphics in the area underneath the - * cursor. - */ - bool _writeToVMAP; - - // Mac versions of games use a remap list to remap their cursors - Common::Array<uint16> _macCursorRemap; - - /** - * Reads data from the output buffer or hardware - * to the given draw region. + * Indicates whether or not the cursor needs to be repainted on the output + * buffer due to a change of graphics in the area underneath the cursor. */ - void readVideo(DrawRegion &target); + bool _needsPaint; /** - * Reads data from the output buffer to the - * given draw region. + * Reads data from the output buffer to the given draw region. */ - void readVideoFromVmap(DrawRegion &target); + void copyFromScreen(DrawRegion &target); /** - * Copies pixel data from the given source to - * the given target. + * Copies pixel data from the given source to the given target. If SKIP is + * true, pixels that match the `skipColor` property of the source will be + * skipped. + * + * @note In SSCI, the function that did not handle skip color was called + * `copy` and the one that did was called `paint`. */ + template <bool SKIP> void copy(DrawRegion &target, const DrawRegion &source); /** - * Draws from the given source onto the given - * target, skipping pixels in the source that - * match the `skipColor` property. - */ - void paint(DrawRegion &target, const DrawRegion &source); - - /** - * Draws the cursor to the position it was - * drawn to prior to moving offscreen or being - * hidden by a call to `hide`. + * Draws the cursor to the position it was drawn to prior to moving + * offscreen or being hidden by a call to `hide`. */ void revealCursor(); /** * Draws the given source to the output buffer. */ - void drawToHardware(const DrawRegion &source); + void drawToScreen(const DrawRegion &source); /** * Renders the cursor at its new location. */ void move(); + +#ifdef ENABLE_SCI32_MAC +public: + void setMacCursorRemapList(int cursorCount, reg_t *cursors); + +private: + // Mac versions of games use a remap list to remap their cursors + Common::Array<uint16> _macCursorRemap; +#endif }; } // End of namespace Sci |