author | celestar |
Tue, 19 Jun 2007 07:21:01 +0000 | |
branch | gamebalance |
changeset 9913 | e79cd19772dd |
child 9629 | 66dde6412125 |
permissions | -rw-r--r-- |
9913
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/* $Id$ */ |
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#ifndef BLITTER_BASE_HPP |
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#define BLITTER_BASE_HPP |
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#include "../spritecache.h" |
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#include "../spriteloader/spriteloader.hpp" |
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enum BlitterMode { |
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BM_NORMAL, |
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BM_COLOUR_REMAP, |
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BM_TRANSPARENT, |
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}; |
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/** |
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* How all blitters should look like. Extend this class to make your own. |
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*/ |
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class Blitter { |
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public: |
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struct BlitterParams { |
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const void *sprite; ///< Pointer to the sprite how ever the encoder stored it |
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const byte *remap; ///< XXX -- Temporary storage for remap array |
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int skip_left, skip_top; ///< How much pixels of the source to skip on the left and top (based on zoom of dst) |
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int width, height; ///< The width and height in pixels that needs to be drawn to dst |
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int sprite_width; ///< Real width of the sprite |
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int sprite_height; ///< Real height of the sprite |
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int left, top; ///< The offset in the 'dst' in pixels to start drawing |
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void *dst; ///< Destination buffer |
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int pitch; ///< The pitch of the destination buffer |
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}; |
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typedef void *AllocatorProc(size_t size); |
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/** |
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* Get the screen depth this blitter works for. |
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* This is either: 8, 16, 24 or 32. |
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*/ |
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virtual uint8 GetScreenDepth() = 0; |
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/** |
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* Draw an image to the screen, given an amount of params defined above. |
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*/ |
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virtual void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) = 0; |
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/** |
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* Draw a colortable to the screen. This is: the color of the screen is read |
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* and is looked-up in the palette to match a new color, which then is put |
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* on the screen again. |
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* @param dst the destination pointer (video-buffer). |
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* @param width the width of the buffer. |
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* @param height the height of the buffer. |
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* @param pal the palette to use. |
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*/ |
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virtual void DrawColorMappingRect(void *dst, int width, int height, int pal) = 0; |
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/** |
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* Convert a sprite from the loader to our own format. |
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*/ |
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virtual Sprite *Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator) = 0; |
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/** |
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* Move the destination pointer the requested amount x and y, keeping in mind |
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* any pitch and bpp of the renderer. |
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* @param video The destination pointer (video-buffer) to scroll. |
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* @param x How much you want to scroll to the right. |
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* @param y How much you want to scroll to the bottom. |
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* @return A new destination pointer moved the the requested place. |
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*/ |
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virtual void *MoveTo(const void *video, int x, int y) = 0; |
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/** |
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* Draw a pixel with a given color on the video-buffer. |
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* @param video The destination pointer (video-buffer). |
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* @param x The x position within video-buffer. |
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* @param y The y position within video-buffer. |
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* @param color A 8bpp mapping color. |
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*/ |
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virtual void SetPixel(void *video, int x, int y, uint8 color) = 0; |
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/** |
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* Draw a pixel with a given color on the video-buffer if there is currently a black pixel. |
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* @param video The destination pointer (video-buffer). |
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* @param x The x position within video-buffer. |
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* @param y The y position within video-buffer. |
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* @param color A 8bpp mapping color. |
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*/ |
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virtual void SetPixelIfEmpty(void *video, int x, int y, uint8 color) = 0; |
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/** |
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* Make a single horizontal line in a single color on the video-buffer. |
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* @param video The destination pointer (video-buffer). |
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* @param width The lenght of the line. |
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* @param color A 8bpp mapping color. |
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*/ |
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virtual void SetHorizontalLine(void *video, int width, uint8 color) = 0; |
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/** |
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* Copy from a buffer to the screen. |
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* @param video The destionation pointer (video-buffer). |
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* @param src The buffer from which the data will be read. |
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* @param width The width of the buffer. |
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* @param height The height of the buffer. |
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* @param src_pitch The pitch (byte per line) of the source buffer. |
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*/ |
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virtual void CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch) = 0; |
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/** |
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* Copy from the screen to a buffer. |
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* @param video The destination pointer (video-buffer). |
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* @param dst The buffer in which the data will be stored. |
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* @param width The width of the buffer. |
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* @param height The height of the buffer. |
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* @param dst_pitch The pitch (byte per line) of the destination buffer. |
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*/ |
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virtual void CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch) = 0; |
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/** |
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* Move the videobuffer some places (via memmove). |
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* @param video_dst The destination pointer (video-buffer). |
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* @param video_src The source pointer (video-buffer). |
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* @param width The width of the buffer to move. |
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* @param height The height of the buffer to move. |
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*/ |
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virtual void MoveBuffer(void *video_dst, const void *video_src, int width, int height) = 0; |
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/** |
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* Calculate how much memory there is needed for an image of this size in the video-buffer. |
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* @param width The width of the buffer-to-be. |
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* @param height The height of the buffer-to-be. |
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* @return The size needed for the buffer. |
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*/ |
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virtual int BufferSize(int width, int height) = 0; |
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virtual ~Blitter() { } |
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}; |
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#endif /* BLITTER_BASE_HPP */ |