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593 lines
18 KiB
C++
593 lines
18 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef GRAPHICS_SURFACE_H
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#define GRAPHICS_SURFACE_H
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#include "common/scummsys.h"
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#include "common/endian.h"
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#include "common/list.h"
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namespace Common {
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struct Rect;
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struct Point;
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}
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#include "graphics/pixelformat.h"
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namespace Graphics {
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/**
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* @defgroup graphics_surface Surface
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* @ingroup graphics
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*
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* @brief Surface class for managing an arbitrary graphics surface.
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*
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* @{
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*/
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struct TransformStruct;
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enum DitherMethod {
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kDitherNaive,
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kDitherFloyd,
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kDitherAtkinson,
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kDitherBurkes,
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kDitherFalseFloyd,
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kDitherSierra,
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kDitherSierraTwoRow,
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kDitherSierraLite,
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kDitherStucki,
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kDitherJarvis,
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};
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/**
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* An arbitrary graphics surface that can be the target (or source) of blit
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* operations, font rendering, etc.
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*/
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struct Surface {
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/**
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* Width of the surface.
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*/
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int16 w;
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/**
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* Height of the surface.
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*/
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int16 h;
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/**
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* Number of bytes in a pixel line.
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*
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* @note This might not equal w * bytesPerPixel.
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*/
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int16 pitch;
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protected:
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/**
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* Pixel data of the surface.
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*/
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void *pixels;
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public:
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/**
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* Pixel format of the surface.
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*/
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PixelFormat format;
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/**
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* Construct a simple Surface object.
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*/
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Surface() : w(0), h(0), pitch(0), pixels(0), format() {
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}
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/**
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* Return a pointer to the pixel data.
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*
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* @return Pointer to the pixel data.
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*/
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inline const void *getPixels() const {
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return pixels;
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}
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/**
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* Return a pointer to the pixel data.
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*
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* @return Pointer to the pixel data.
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*/
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inline void *getPixels() {
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return pixels;
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}
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/**
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* Set the pixel data.
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*
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* Note that this is a simply a setter. Be aware of that when using it.
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*
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* @param newPixels The new pixel data.
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*/
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void setPixels(void *newPixels) { pixels = newPixels; }
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/**
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* Return a pointer to the pixel at the specified point.
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*
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* @param x The x coordinate of the pixel.
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* @param y The y coordinate of the pixel.
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*
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* @return Pointer to the pixel.
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*/
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inline const void *getBasePtr(int x, int y) const {
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return (const byte *)(pixels) + y * pitch + x * format.bytesPerPixel;
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}
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/**
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* Return a pointer to the pixel at the specified point.
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*
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* @param x The x coordinate of the pixel.
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* @param y The y coordinate of the pixel.
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*
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* @return Pointer to the pixel.
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*/
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inline void *getBasePtr(int x, int y) {
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return static_cast<byte *>(pixels) + y * pitch + x * format.bytesPerPixel;
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}
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/**
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* Return the pixel at the specified point.
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*
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* @param x The x coordinate of the pixel.
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* @param y The y coordinate of the pixel.
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*
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* @return The value of the pixel.
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*/
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inline uint32 getPixel(int x, int y) const {
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assert(format.bytesPerPixel > 0 && format.bytesPerPixel <= 4);
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if (format.bytesPerPixel == 1)
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return *((const uint8 *)getBasePtr(x, y));
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else if (format.bytesPerPixel == 2)
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return *((const uint16 *)getBasePtr(x, y));
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else if (format.bytesPerPixel == 3)
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return READ_UINT24(getBasePtr(x, y));
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else if (format.bytesPerPixel == 4)
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return *((const uint32 *)getBasePtr(x, y));
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else
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return 0;
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}
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/**
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* Set the pixel at the specified point.
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*
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* @param x The x coordinate of the pixel.
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* @param y The y coordinate of the pixel.
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* @param pixel The value of the pixel.
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*/
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inline void setPixel(int x, int y, int pixel) {
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assert(format.bytesPerPixel > 0 && format.bytesPerPixel <= 4);
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if (format.bytesPerPixel == 1)
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*((uint8 *)getBasePtr(x, y)) = pixel;
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else if (format.bytesPerPixel == 2)
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*((uint16 *)getBasePtr(x, y)) = pixel;
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else if (format.bytesPerPixel == 3)
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WRITE_UINT24(getBasePtr(x, y), pixel);
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else if (format.bytesPerPixel == 4)
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*((uint32 *)getBasePtr(x, y)) = pixel;
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}
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/**
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* Allocate memory for the pixel data of the surface.
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*
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* The client code is responsible for calling @ref free.
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*
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* @param width Width of the surface object.
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* @param height Height of the surface object.
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* @param format The pixel format to be used by the surface.
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*/
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void create(int16 width, int16 height, const PixelFormat &format);
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/**
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* Release the memory used by the pixel memory of this surface.
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*
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* This is the counterpart of @ref create().
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*
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* @b Important: Only use this if you created the surface data using
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* @ref create. Otherwise, this function has undefined behavior.
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*/
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void free();
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/**
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* Set up a surface with user-specified data.
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*
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* This simply sets the 'internal' attributes of the surface. It
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* does free old data using @ref free or similar methods.
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*
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* @param width Width of the pixel data.
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* @param height Height of the pixel data.
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* @param pitch Pitch of the pixel data.
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* @param pixels Pixel data.
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* @param format Pixel format of the pixel data.
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*/
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void init(int16 width, int16 height, int16 pitch, void *pixels, const PixelFormat &format);
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/**
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* Copy the data from another surface.
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*
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* This calls @ref free on the current surface to assure that it is
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* clean. Make sure that the current data was created using @ref create.
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* Otherwise, the results are undefined.
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*
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* @param surf The surface to copy from.
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*/
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void copyFrom(const Surface &surf);
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/**
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* Convert the data from another surface to the specified format.
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*
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* This calls @ref free on the current surface to assure that it is
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* clean. Make sure that the current data was created using @ref create.
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* Otherwise, the results are undefined.
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*
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* @param surf The surface to convert from.
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* @param format The pixel format to convert to.
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*/
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void convertFrom(const Surface &surf, const PixelFormat &format);
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/**
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* Create a surface that represents a sub-area of this Surface object.
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*
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* The pixel (0, 0) of the returned Surface will be the same as pixel
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* (area.x, area.y) of the parent surface. Changes to any of the parent surface
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* objects will change the shared pixel data.
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*
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* The returned surface is only valid as long as this Surface
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* object still exists, that is, its pixel data is not destroyed or
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* reallocated.
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*
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* @b Important: Never attempt to free the returned surface.
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*
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* @param area The area to be represented. Note that the area
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* will get clipped in case it does not fit.
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*/
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Surface getSubArea(const Common::Rect &area);
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/**
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* Create a surface that represents a sub-area of this Surface object.
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*
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* The pixel (0, 0) of the returned surface will be the same as pixel
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* (area.x, area.y) of the parent surface.
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*
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* The returned surface is only valid as long as this Surface
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* object still exists, that is, its pixel data is not destroyed or
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* reallocated.
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*
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* @b Important: Never attempt to free the returned surface.
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*
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* @param area The area to be represented. Note that the area
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* will get clipped in case it does not fit.
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*/
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const Surface getSubArea(const Common::Rect &area) const;
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/**
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* Clip the given source bounds so the passed destBounds will be entirely on-screen.
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*/
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bool clip(Common::Rect &srcBounds, Common::Rect &destBounds) const;
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/**
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* Copy a bitmap to the internal buffer of the surface.
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*
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* The pixel format of the buffer must match the pixel format of the surface.
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*
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* @param buffer Buffer containing the graphics data source.
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* @param srcPitch Pitch of the buffer (number of bytes in a scanline).
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* @param destX The x coordinate of the destination rectangle.
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* @param destY The y coordinate of the destination rectangle.
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* @param width Width of the destination rectangle.
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* @param height Height of the destination rectangle.
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*/
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void copyRectToSurface(const void *buffer, int srcPitch, int destX, int destY, int width, int height);
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/**
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* Copy a bitmap to the internal buffer of the surface.
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*
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* The pixel format of the buffer must match the pixel format of the surface.
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*
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* @param srcSurface Source of the bitmap data.
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* @param destX The x coordinate of the destination rectangle.
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* @param destY The y coordinate of the destination rectangle.
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* @param subRect The subRect of the surface to be blitted.
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*/
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void copyRectToSurface(const Graphics::Surface &srcSurface, int destX, int destY, const Common::Rect subRect);
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/**
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* Copy a bitmap to the internal buffer of the surface.
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*
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* The pixel format of the buffer must match the pixel format of the surface.
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*
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* @param buffer Buffer containing the graphics data source.
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* @param srcPitch Pitch of the buffer (number of bytes in a scanline).
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* @param destX The x coordinate of the destination rectangle.
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* @param destY The y coordinate of the destination rectangle.
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* @param width Width of the destination rectangle.
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* @param height Height of the destination rectangle.
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* @param key
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*/
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void copyRectToSurfaceWithKey(const void *buffer, int srcPitch, int destX, int destY, int width, int height, uint32 key);
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/**
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* Copy a bitmap to the internal buffer of the surface.
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*
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* The pixel format of the buffer must match the pixel format of the surface.
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*
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* @param srcSurface Source of the bitmap data.
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* @param destX The x coordinate of the destination rectangle.
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* @param destY The y coordinate of the destination rectangle.
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* @param subRect The subRect of the surface to be blitted.
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* @param key
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*/
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void copyRectToSurfaceWithKey(const Graphics::Surface &srcSurface, int destX, int destY, const Common::Rect subRect, uint32 key);
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/**
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* Convert the data to another pixel format.
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*
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* This works in-place. This means it does not create an additional buffer
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* for the conversion process. The value of 'pixels' might change though
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* (that means it might realloc the pixel data).
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*
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* @b Important: Only use this if you created the surface data using
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* @ref create. Otherwise, this function has undefined behavior.
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*
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* @param dstFormat The desired format.
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* @param palette The palette (in RGB888), if the source format has a bpp of 1.
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*/
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void convertToInPlace(const PixelFormat &dstFormat, const byte *palette = 0);
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/**
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* Convert the data to another pixel format.
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*
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* The client code must call @ref free on the returned surface and then delete
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* it.
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*
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* @param dstFormat The desired format.
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* @param srcPalette The palette (in RGB888), if the source format has a bpp of 1.
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* @param srcPaletteCount The color count in the for the srcPalette.
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* @param dstPalette The palette (in RGB888), If the destination format has a bpp of 1.
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* @param dstaletteCount The color count in the for the dstPalette.
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* @param method The dithering method if destination format has a bpp of 1. Default is Floyd-Steinberg.
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*/
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Graphics::Surface *convertTo(const PixelFormat &dstFormat, const byte *srcPalette = 0, int srcPaletteCount = 0, const byte *dstPalette = 0, int dstPaletteCount = 0, DitherMethod method = kDitherFloyd) const;
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private:
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void ditherFloyd(const byte *srcPalette, int srcPaletteCount, Surface *dstSurf, const byte *dstPalette, int dstPaletteCount, DitherMethod method, const PixelFormat &dstFormat) const;
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public:
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/**
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* Draw a line.
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*
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* @param x0 The x coordinate of the start point.
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* @param y0 The y coordinate of the start point.
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* @param x1 The x coordinate of the end point.
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* @param y1 The y coordinate of the end point.
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* @param color Color of the line.
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*
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* @note This is just a wrapper around Graphics::drawLine.
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*/
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void drawLine(int x0, int y0, int x1, int y1, uint32 color);
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/**
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* Draw a thick line.
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*
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* @param x0 The x coordinate of the start point.
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* @param y0 The y coordinate of the start point.
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* @param x1 The x coordinate of the end point.
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* @param y1 The y coordinate of the end point.
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* @param penX Width of the pen (thickness in the x direction).
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* @param penY Height of the pen (thickness in the y direction).
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* @param color Color of the line.
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*
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* @note This is just a wrapper around Graphics::drawThickLine.
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*
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* @note The x/y coordinates of the start and end points are the upper leftmost part of the pen.
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*/
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void drawThickLine(int x0, int y0, int x1, int y1, int penX, int penY, uint32 color);
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/**
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* Draw a horizontal line.
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*
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* @param x The start x coordinate of the line.
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* @param y The y coordinate of the line.
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* @param x2 The end x coordinate of the line.
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* In case x > x2, the coordinates are swapped.
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* @param color Color of the line.
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*/
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void hLine(int x, int y, int x2, uint32 color);
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/**
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* Draw a vertical line.
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*
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* @param x The x coordinate of the line.
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* @param y The start y coordinate of the line.
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* @param y2 The end y coordinate of the line.
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* In case y > y2, the coordinates are swapped.
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* @param color Color of the line.
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*/
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void vLine(int x, int y, int y2, uint32 color);
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/**
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* Fill a rect with a given color.
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*
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* @param r The rectangle to fill.
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* @param color The color to fill the rect with.
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*/
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void fillRect(Common::Rect r, uint32 color);
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/**
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* Draw a frame around a specified rect.
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*
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* @param r The rectangle to frame.
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* @param color The color of the frame.
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*/
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void frameRect(const Common::Rect &r, uint32 color);
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/**
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* Move the content of the surface horizontally or vertically
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* by the given number of pixels.
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*/
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void move(int dx, int dy, int height);
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/**
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* Flip the specified rect vertically.
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*
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* @param r The rectangle to flip.
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*/
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void flipVertical(const Common::Rect &r);
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/**
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* Flip the specified rect horizontally.
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*
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* @param r The rectangle to flip.
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*/
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void flipHorizontal(const Common::Rect &r);
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/**
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* Scale the data to the given size.
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*
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* The client code must call @ref free on the returned surface and then delete
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* it.
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*
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* @param newWidth The resulting width.
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* @param newHeight The resulting height.
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* @param filtering Whether or not to use bilinear filtering.
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*/
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Graphics::Surface *scale(int16 newWidth, int16 newHeight, bool filtering = false) const;
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/**
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* @brief Rotoscale function; this returns a transformed version of this surface after rotation and
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* scaling. Please do not use this if angle == 0, use plain old scaling function.
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*
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* The client code must call @ref free on the returned surface and then delete
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* it.
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*
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* @param transform a TransformStruct wrapping the required info. @see TransformStruct
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* @param filtering Whether or not to use bilinear filtering.
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*
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*/
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Graphics::Surface *rotoscale(const TransformStruct &transform, bool filtering = false) const;
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/**
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* Print surface content on console in pseudographics
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*
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* @param debuglevel debug level to print at, default is 0.
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* @param width width of the printed area in pixels. Default is 0 which is whole surface.
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* @param height height of the printed area in pixels. Default is 0 which is whole surface.
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* @param x horizontal offset to the print area. Default is 0.
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* @param y vertical offset to the print area. Default is 0.
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* @param scale number of pixels per single character. Default is -1, fit whole surface to maxwidth
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* @param maxwidth horizontal size of the print out in characters. Default is 160. Note that 2 characters
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* are taken by the frame
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* @param palette palette to use for 1bpp pixels. If omitted, we assume grayscale palette
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*
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*/
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void debugPrint(int debuglevel = 0, int width = 0, int height = 0, int x = 0, int y = 0, int scale = -1, int maxwidth = 160, const byte *palette = NULL) const;
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};
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/**
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* A deleter for Surface objects that can be used with SharedPtr.
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*
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* This deleter assures Surface::free is called on deletion.
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*/
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struct SurfaceDeleter {
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void operator()(Surface *ptr) {
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if (ptr) {
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ptr->free();
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}
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delete ptr;
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}
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};
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/**
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* Stack-based flood fill algorithm for arbitrary surfaces.
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*
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* This can be used in two ways. One is to fill the pixels of oldColor
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|
* with fillColor. Second is when the surface stays intact but another
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* surface with mask is created, where filled colors are marked with 255.
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|
*
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* Before running fill() or fillMask(), the initial pixels must be addSeed
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* with the addSeed() method.
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|
*/
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class FloodFill {
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public:
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/**
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|
* Construct a simple Surface object.
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*
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* @param surface Input surface.
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|
* @param oldColor The color on the surface to change.
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|
* @param fillColor The color to fill with.
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|
*/
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|
FloodFill(Surface *surface, uint32 oldColor, uint32 fillColor, bool maskMode = false);
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~FloodFill();
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|
|
|
/**
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|
* Add pixels to the fill queue.
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|
*
|
|
* @param x The x coordinate of the pixel.
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|
* @param y The x coordinate of the pixel.
|
|
*/
|
|
void addSeed(int x, int y);
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|
|
|
/**
|
|
* Fill the surface as requested.
|
|
*
|
|
* This uses pixels that were added with the @ref addSeed() method.
|
|
*/
|
|
void fill();
|
|
|
|
/**
|
|
* Fill the mask.
|
|
*
|
|
* The mask is a CLUT8 surface with pixels 0 and 255.
|
|
* 255 means that the pixel has been filled.
|
|
*
|
|
* This uses pixels that were added with the @ref addSeed() method.
|
|
*/
|
|
void fillMask();
|
|
|
|
/**
|
|
* Get the resulting mask.
|
|
*
|
|
* @see fillMask
|
|
*/
|
|
Surface *getMask() { return _mask; }
|
|
|
|
private:
|
|
Common::List<Common::Point *> _queue;
|
|
Surface *_surface;
|
|
Surface *_mask;
|
|
uint32 _oldColor, _fillColor;
|
|
byte *_visited;
|
|
int _w, _h;
|
|
|
|
bool _maskMode;
|
|
};
|
|
/** @} */
|
|
} // End of namespace Graphics
|
|
|
|
|
|
#endif
|