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/* $Id$ */
#ifndef BLITTER_BASE_HPP
#define BLITTER_BASE_HPP
#include "../spritecache.h"
#include "../spriteloader/spriteloader.hpp"
enum BlitterMode {
BM_NORMAL,
BM_COLOUR_REMAP,
BM_TRANSPARENT,
};
/**
* How all blitters should look like. Extend this class to make your own.
*/
class Blitter {
public:
struct BlitterParams {
const void *sprite; ///< Pointer to the sprite how ever the encoder stored it
const byte *remap; ///< XXX -- Temporary storage for remap array
int skip_left, skip_top; ///< How much pixels of the source to skip on the left and top (based on zoom of dst)
int width, height; ///< The width and height in pixels that needs to be drawn to dst
int sprite_width; ///< Real width of the sprite
int sprite_height; ///< Real height of the sprite
int left, top; ///< The offset in the 'dst' in pixels to start drawing
void *dst; ///< Destination buffer
int pitch; ///< The pitch of the destination buffer
};
typedef void *AllocatorProc(size_t size);
/**
* Get the screen depth this blitter works for.
* This is either: 8, 16, 24 or 32.
*/
virtual uint8 GetScreenDepth() = 0;
/**
* Draw an image to the screen, given an amount of params defined above.
*/
virtual void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) = 0;
/**
* Draw a colortable to the screen. This is: the color of the screen is read
* and is looked-up in the palette to match a new color, which then is put
* on the screen again.
* @param dst the destination pointer (video-buffer).
* @param width the width of the buffer.
* @param height the height of the buffer.
* @param pal the palette to use.
*/
virtual void DrawColorMappingRect(void *dst, int width, int height, int pal) = 0;
/**
* Convert a sprite from the loader to our own format.
*/
virtual Sprite *Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator) = 0;
/**
* Move the destination pointer the requested amount x and y, keeping in mind
* any pitch and bpp of the renderer.
* @param video The destination pointer (video-buffer) to scroll.
* @param x How much you want to scroll to the right.
* @param y How much you want to scroll to the bottom.
* @return A new destination pointer moved the the requested place.
*/
virtual void *MoveTo(const void *video, int x, int y) = 0;
/**
* Draw a pixel with a given color on the video-buffer.
* @param video The destination pointer (video-buffer).
* @param x The x position within video-buffer.
* @param y The y position within video-buffer.
* @param color A 8bpp mapping color.
*/
virtual void SetPixel(void *video, int x, int y, uint8 color) = 0;
/**
* Draw a pixel with a given color on the video-buffer if there is currently a black pixel.
* @param video The destination pointer (video-buffer).
* @param x The x position within video-buffer.
* @param y The y position within video-buffer.
* @param color A 8bpp mapping color.
*/
virtual void SetPixelIfEmpty(void *video, int x, int y, uint8 color) = 0;
/**
* Make a single horizontal line in a single color on the video-buffer.
* @param video The destination pointer (video-buffer).
* @param width The lenght of the line.
* @param color A 8bpp mapping color.
*/
virtual void SetHorizontalLine(void *video, int width, uint8 color) = 0;
/**
* Draw a line in which ever direction.
*/
virtual void DrawLine(void *video, int x, int y, int x2, int y2, uint8 color) = 0;
/**
* Copy from a buffer to the screen.
* @param video The destionation pointer (video-buffer).
* @param src The buffer from which the data will be read.
* @param width The width of the buffer.
* @param height The height of the buffer.
* @param src_pitch The pitch (byte per line) of the source buffer.
*/
virtual void CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch) = 0;
/**
* Copy from the screen to a buffer.
* @param video The destination pointer (video-buffer).
* @param dst The buffer in which the data will be stored.
* @param width The width of the buffer.
* @param height The height of the buffer.
* @param dst_pitch The pitch (byte per line) of the destination buffer.
*/
virtual void CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch) = 0;
/**
* Move the videobuffer some places (via memmove).
* @param video_dst The destination pointer (video-buffer).
* @param video_src The source pointer (video-buffer).
* @param width The width of the buffer to move.
* @param height The height of the buffer to move.
*/
virtual void MoveBuffer(void *video_dst, const void *video_src, int width, int height) = 0;
/**
* Calculate how much memory there is needed for an image of this size in the video-buffer.
* @param width The width of the buffer-to-be.
* @param height The height of the buffer-to-be.
* @return The size needed for the buffer.
*/
virtual int BufferSize(int width, int height) = 0;
virtual ~Blitter() { }
};
#endif /* BLITTER_BASE_HPP */
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