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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 GRAPHICS_SURFACE_H
#define GRAPHICS_SURFACE_H
#include "common/scummsys.h"
namespace Common {
struct Rect;
}
#include "graphics/pixelformat.h"
namespace Graphics {
/**
* An arbitrary graphics surface, which can be the target (or source) of blit
* operations, font rendering, etc.
*/
struct Surface {
/*
* IMPORTANT implementation specific detail:
*
* ARM code relies on the layout of the first 3 of these fields. Do not
* change them.
*/
/**
* The width of the surface.
*/
uint16 w;
/**
* The height of the surface.
*/
uint16 h;
/**
* The number of bytes a pixel line has.
*
* Note that this might not equal w * bytesPerPixel.
*/
uint16 pitch;
/**
* The surface's pixel data.
*/
void *pixels;
/**
* The pixel format of the surface.
*/
PixelFormat format;
/**
* Construct a simple Surface object.
*/
Surface() : w(0), h(0), pitch(0), pixels(0), format() {
}
/**
* Return a pointer to the pixel at the specified point.
*
* @param x The x coordinate of the pixel.
* @param y The y coordinate of the pixel.
* @return Pointer to the pixel.
*/
inline const void *getBasePtr(int x, int y) const {
return (const byte *)(pixels) + y * pitch + x * format.bytesPerPixel;
}
/**
* Return a pointer to the pixel at the specified point.
*
* @param x The x coordinate of the pixel.
* @param y The y coordinate of the pixel.
* @return Pointer to the pixel.
*/
inline void *getBasePtr(int x, int y) {
return static_cast<byte *>(pixels) + y * pitch + x * format.bytesPerPixel;
}
/**
* Allocate memory for the pixel data of the surface.
*
* Note that you are responsible for calling free yourself.
* @see free
*
* @param width Width of the surface object.
* @param height Height of the surface object.
* @param format The pixel format the surface should use.
*/
void create(uint16 width, uint16 height, const PixelFormat &format);
/**
* Release the memory used by the pixels memory of this surface. This is the
* counterpart to create().
*
* Note that you should only use this, when you created the Surface data via
* create! Otherwise this function has undefined behavior.
* @see create
*/
void free();
/**
* Copy the data from another Surface.
*
* Note that this calls free on the current surface, to assure it being
* clean. So be sure the current data was created via create, otherwise
* the results are undefined.
* @see create
* @see free
*
* @param surf Surface to copy from.
*/
void copyFrom(const Surface &surf);
/**
* Draw a line.
*
* @param x0 The x coordinate of the start point.
* @param y0 The y coordiante of the start point.
* @param x1 The x coordinate of the end point.
* @param y1 The y coordinate of the end point.
* @param color The color of the line.
*/
void drawLine(int x0, int y0, int x1, int y1, uint32 color);
/**
* Draw a horizontal line.
*
* @param x The start x coordinate of the line.
* @param y The y coordiante of the line.
* @param x2 The end x coordinate of the line.
* In case x > x2 the coordinates are swapped.
* @param color The color of the line.
*/
void hLine(int x, int y, int x2, uint32 color);
/**
* Draw a vertical line.
*
* @param x The x coordinate of the line.
* @param y The start y coordiante of the line.
* @param y2 The end y coordinate of the line.
* In case y > y2 the coordinates are swapped.
* @param color The color of the line.
*/
void vLine(int x, int y, int y2, uint32 color);
/**
* Fill a rect with a given color.
*
* @param r Rect to fill
* @param color The color of the rect's contents.
*/
void fillRect(Common::Rect r, uint32 color);
/**
* Draw a frame around a specified rect.
*
* @param r Rect to frame
* @param color The color of the frame.
*/
void frameRect(const Common::Rect &r, uint32 color);
// See comment in graphics/surface.cpp about it
void move(int dx, int dy, int height);
};
/**
* A deleter for Surface objects which can be used with SharedPtr.
*
* This deleter assures Surface::free is called on deletion.
*/
struct SharedPtrSurfaceDeleter {
void operator()(Surface *ptr) {
ptr->free();
delete ptr;
}
};
} // End of namespace Graphics
#endif
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