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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef SCI_GRAPHICS_CELOBJ32_H
#define SCI_GRAPHICS_CELOBJ32_H
#include "common/rational.h"
#include "common/rect.h"
#include "sci/resource.h"
#include "sci/engine/vm_types.h"
namespace Sci {
typedef Common::Rational Ratio;
enum CelType {
kCelTypeView = 0,
kCelTypePic = 1,
kCelTypeMem = 2,
kCelTypeColor = 3
};
enum CelCompressionType {
kCelCompressionNone = 0,
kCelCompressionRLE = 138,
kCelCompressionInvalid = 1000
};
/**
* A CelInfo32 object describes the basic properties of a
* cel object.
*/
struct CelInfo32 {
/**
* The type of the cel object.
*/
CelType type;
/**
* For cel objects that draw from resources, the ID of
* the resource to load.
*/
GuiResourceId resourceId;
/**
* For CelObjView, the loop number to draw from the
* view resource.
*/
int16 loopNo;
/**
* For CelObjView and CelObjPic, the cel number to draw
* from the view or pic resource.
*/
int16 celNo;
/**
* For CelObjMem, a segment register pointing to a heap
* resource containing headered bitmap data.
*/
reg_t bitmap;
/**
* For CelObjColor, the fill colour.
*/
uint8 color;
// NOTE: In at least SCI2.1/SQ6, color is left
// uninitialised.
CelInfo32() :
type(kCelTypeMem),
resourceId(0),
loopNo(0),
celNo(0),
bitmap(NULL_REG) {}
// NOTE: This is the equivalence criteria used by
// CelObj::searchCache in at least SCI2.1/SQ6. Notably,
// it does not check the color field.
inline bool operator==(const CelInfo32 &other) {
return (
type == other.type &&
resourceId == other.resourceId &&
loopNo == other.loopNo &&
celNo == other.celNo &&
bitmap == other.bitmap
);
}
};
class CelObj;
struct CelCacheEntry {
/**
* A monotonically increasing cache ID used to identify
* the least recently used item in the cache for
* replacement.
*/
int id;
CelObj *celObj;
CelCacheEntry() : id(0), celObj(nullptr) {}
};
typedef Common::Array<CelCacheEntry> CelCache;
#pragma mark -
#pragma mark CelScaler
struct CelScalerTable {
/**
* A lookup table of indexes that should be used to find
* the correct column to read from the source bitmap
* when drawing a scaled version of the source bitmap.
*/
int valuesX[1024];
/**
* The ratio used to generate the x-values.
*/
Ratio scaleX;
/**
* A lookup table of indexes that should be used to find
* the correct row to read from a source bitmap when
* drawing a scaled version of the source bitmap.
*/
int valuesY[1024];
/**
* The ratio used to generate the y-values.
*/
Ratio scaleY;
};
class CelScaler {
/**
* Cached scale tables.
*/
CelScalerTable _scaleTables[2];
/**
* The index of the most recently used scale table.
*/
int _activeIndex;
/**
* Activates a scale table for the given X and Y ratios.
* If there is no table that matches the given ratios,
* the least most recently used table will be replaced
* and activated.
*/
void activateScaleTables(const Ratio &scaleX, const Ratio &scaleY);
/**
* Builds a pixel lookup table in `table` for the given
* ratio. The table will be filled up to the specified
* size, which should be large enough to draw across the
* entire target buffer.
*/
void buildLookupTable(int *table, const Ratio &ratio, const int size);
public:
CelScaler() :
_scaleTables(),
_activeIndex(0) {
CelScalerTable &table = _scaleTables[_activeIndex];
table.scaleX = Ratio();
table.scaleY = Ratio();
for (int i = 0; i < ARRAYSIZE(table.valuesX); ++i) {
table.valuesX[i] = i;
table.valuesY[i] = i;
}
}
/**
* Retrieves scaler tables for the given X and Y ratios.
*/
const CelScalerTable *getScalerTable(const Ratio &scaleX, const Ratio &scaleY);
};
#pragma mark -
#pragma mark CelObj
class ScreenItem;
/**
* A cel object is the lowest-level rendering primitive in
* the SCI engine and draws itself directly to a target
* pixel buffer.
*/
class CelObj {
private:
static CelScaler *_scaler;
protected:
/**
* When true, this cel will be horizontally mirrored
* when it is drawn. This is an internal flag that is
* set by draw methods based on the combination of the
* cel's `_mirrorX` property and the owner screen item's
* `_mirrorX` property.
*/
bool _drawMirrored;
public:
/**
* The basic identifying information for this cel. This
* information effectively acts as a composite key for
* a cel object, and any cel object can be recreated
* from this data alone.
*/
CelInfo32 _info;
/**
* The offset to the cel header for this cel within the
* raw resource data.
*/
uint32 _celHeaderOffset;
/**
* The offset to the embedded palette for this cel
* within the raw resource data.
*/
uint32 _hunkPaletteOffset;
/**
* The natural dimensions of the cel.
*/
uint16 _width, _height;
/**
* TODO: Documentation
*/
Common::Point _displace;
/**
* The dimensions of the original coordinate system for
* the cel. Used to scale cels from their native size
* to the correct size on screen.
*
* @note This is set to scriptWidth/Height for
* CelObjColor. For other cel objects, the value comes
* from the raw resource data. For text bitmaps, this is
* the width/height of the coordinate system used to
* generate the text, which also defaults to
* scriptWidth/Height but seems to typically be changed
* to more closely match the native screen resolution.
*/
uint16 _scaledWidth, _scaledHeight;
/**
* The skip (transparent) colour for the cel. When
* compositing, any pixels matching this colour will not
* be copied to the buffer.
*/
uint8 _transparentColor;
/**
* Whether or not this cel has any transparent regions.
* This is used for optimised drawing of non-transparent
* cels.
*/
bool _transparent; // TODO: probably "skip"?
/**
* The compression type for the pixel data for this cel.
*/
CelCompressionType _compressionType;
/**
* Whether or not this cel should be palette-remapped?
*/
bool _remap;
/**
* If true, the cel contains pre-mirrored picture data.
* This value comes directly from the resource data and
* is XORed with the `_mirrorX` property of the owner
* screen item when rendering.
*/
bool _mirrorX;
/**
* Initialises static CelObj members.
*/
static void init();
/**
* Frees static CelObj members.
*/
static void deinit();
virtual ~CelObj() {};
/**
* Draws the cel to the target buffer using the priority
* and positioning information from the given screen
* item. The mirroring of the cel will be unchanged from
* any previous call to draw.
*/
void draw(Buffer &target, const ScreenItem &screenItem, const Common::Rect &targetRect) const;
/**
* Draws the cel to the target buffer using the priority
* and positioning information from the given screen
* item and the given mirror flag.
*
* @note In SCI engine, this function was a virtual
* function, but CelObjView, CelObjPic, and CelObjMem
* all used the same function and the compiler
* deduplicated the copies; we deduplicate the source by
* putting the implementation on CelObj instead of
* copying it to 3/4 of the subclasses.
*/
virtual void draw(Buffer &target, const ScreenItem &screenItem, const Common::Rect &targetRect, const bool mirrorX);
/**
* Draws the cel to the target buffer using the
* positioning and mirroring information from the
* provided arguments.
*
* @note In SCI engine, this function was a virtual
* function, but CelObjView, CelObjPic, and CelObjMem
* all used the same function and the compiler
* deduplicated the copies; we deduplicate the source by
* putting the implementation on CelObj instead of
* copying it to 3/4 of the subclasses.
*/
virtual void draw(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition, const bool mirrorX);
/**
* Draws the cel to the target buffer using the given
* position and scaling parameters. The mirroring of the
* cel will be unchanged from any previous call to draw.
*/
void drawTo(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition, const Ratio &scaleX, const Ratio &scaleY) const;
/**
* Creates a copy of this cel on the free store and
* returns a pointer to the new object. The new cel will
* point to a shared copy of bitmap/resource data.
*/
virtual CelObj *duplicate() const = 0;
/**
* Retrieves a pointer to the raw resource data for this
* cel. This method cannot be used with a CelObjColor.
*/
virtual byte *getResPointer() const = 0;
/**
* Reads the pixel at the given coordinates. This method
* is valid only for CelObjView and CelObjPic.
*/
inline uint8 readPixel(uint16 x, uint16 y, bool mirrorX) const;
/**
* Submits the palette from this cel to the palette
* manager for integration into the master screen
* palette.
*/
void submitPalette() const;
#pragma mark -
#pragma mark CelObj - Drawing
private:
void drawHzFlip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawNoFlip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawUncompNoFlip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawUncompHzFlip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void scaleDraw(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void scaleDrawUncomp(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawHzFlipMap(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawNoFlipMap(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawUncompNoFlipMap(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawUncompHzFlipMap(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void scaleDrawMap(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void scaleDrawUncompMap(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawHzFlipMap(Buffer &target, const Buffer &priorityMap, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
void drawNoFlipMap(Buffer &target, const Buffer &priorityMap, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
void drawUncompNoFlipMap(Buffer &target, const Buffer &priorityMap, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
void drawUncompHzFlipMap(Buffer &target, const Buffer &priorityMap, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
void scaleDrawMap(Buffer &target, const Buffer &priorityMap, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
void scaleDrawUncompMap(Buffer &target, const Buffer &priorityMap, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
void drawHzFlipNoMD(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawNoFlipNoMD(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawUncompNoFlipNoMD(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawUncompNoFlipNoMDNoSkip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawUncompHzFlipNoMD(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawUncompHzFlipNoMDNoSkip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void scaleDrawNoMD(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void scaleDrawUncompNoMD(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const;
void drawHzFlipNoMD(Buffer &target, const Buffer &priorityMap, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
void drawNoFlipNoMD(Buffer &target, const Buffer &priorityMap, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
void drawUncompNoFlipNoMD(Buffer &target, const Buffer &priorityMap, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
void drawUncompHzFlipNoMD(Buffer &target, const Buffer &priorityMap, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
void scaleDrawNoMD(Buffer &target, const Buffer &priorityMap, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
void scaleDrawUncompNoMD(Buffer &target, const Buffer &priorityMap, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition, const uint8 priority) const;
#pragma mark -
#pragma mark CelObj - Caching
protected:
/**
* A monotonically increasing cache ID used to identify
* the least recently used item in the cache for
* replacement.
*/
static int _nextCacheId;
/**
* A cache of cel objects used to avoid reinitialisation
* overhead for cels with the same CelInfo32.
*/
// NOTE: At least SQ6 uses a fixed cache size of 100.
static CelCache *_cache;
/**
* Searches the cel cache for a CelObj matching the
* provided CelInfo32. If not found, -1 is returned.
* nextInsertIndex will receive the index of the oldest
* item in the cache, which can be used to replace
* the oldest item with a newer item.
*/
int searchCache(const CelInfo32 &celInfo, int *nextInsertIndex) const;
/**
* Puts a copy of this CelObj into the cache at the
* given cache index.
*/
void putCopyInCache(int index) const;
};
#pragma mark -
#pragma mark CelObjView
/**
* A CelObjView is the drawing primitive for a View type
* resource. Each CelObjView corresponds to a single cel
* within a single loop of a view.
*/
class CelObjView : public CelObj {
private:
/**
* Analyses resources without baked-in remap flags
* to determine whether or not they should be remapped.
*/
bool analyzeUncompressedForRemap() const;
/**
* Analyses compressed resources without baked-in remap
* flags to determine whether or not they should be
* remapped.
*/
bool analyzeForRemap() const;
public:
CelObjView(GuiResourceId viewId, int16 loopNo, int16 celNo);
virtual ~CelObjView() override {};
using CelObj::draw;
/**
* Draws the cel to the target buffer using the
* positioning, mirroring, and scaling information from
* the provided arguments.
*/
void draw(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition, bool mirrorX, const Ratio &scaleX, const Ratio &scaleY);
virtual CelObjView *duplicate() const override;
virtual byte *getResPointer() const override;
};
#pragma mark -
#pragma mark CelObjPic
/**
* A CelObjPic is the drawing primitive for a Picture type
* resource. Each CelObjPic corresponds to a single cel
* within a picture.
*/
class CelObjPic : public CelObj {
private:
/**
* Analyses uncompressed resources without baked-in skip
* flags to determine whether or not they can use fast
* blitting.
*/
bool analyzeUncompressedForSkip() const;
public:
/**
* The number of cels in the original picture resource.
*/
uint8 _celCount;
/**
* The position of this cel relative to the top-left
* corner of the picture.
*/
Common::Point _relativePosition;
/**
* The z-buffer priority for this cel. Higher prorities
* are drawn on top of lower priorities.
*/
int16 _priority;
CelObjPic(GuiResourceId pictureId, int16 celNo);
virtual ~CelObjPic() override {};
using CelObj::draw;
virtual void draw(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition, const bool mirrorX) override;
virtual CelObjPic *duplicate() const override;
virtual byte *getResPointer() const override;
};
#pragma mark -
#pragma mark CelObjMem
/**
* A CelObjMem is the drawing primitive for arbitrary
* bitmaps generated in memory. Generated bitmaps in SCI32
* include text & vector drawings and per-pixel screen
* transitions like dissolves.
*/
class CelObjMem : public CelObj {
public:
CelObjMem(reg_t bitmap);
virtual ~CelObjMem() override {};
virtual CelObjMem *duplicate() const override;
virtual byte *getResPointer() const override;
};
#pragma mark -
#pragma mark CelObjColor
/**
* A CelObjColor is the drawing primitive for fast,
* low-memory, flat colour fills.
*/
class CelObjColor : public CelObj {
public:
CelObjColor(uint8 color, int16 width, int16 height);
virtual ~CelObjColor() override {};
using CelObj::draw;
/**
* Block fills the target buffer with the cel colour.
*/
void draw(Buffer &target, const Common::Rect &targetRect) const;
virtual void draw(Buffer &target, const ScreenItem &screenItem, const Common::Rect &targetRect, bool mirrorX) override;
virtual void draw(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition, bool mirrorX) override;
virtual CelObjColor *duplicate() const override;
virtual byte *getResPointer() const override;
};
}
#endif
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