(svn r26259) -Codechange: add and maintain some general flags about sprites to prevent unneeded execution of expensive code (MJP)

This commit is contained in:
rubidium
2014-01-13 18:17:17 +00:00
parent 4585f74faa
commit ec66bd461b
2 changed files with 31 additions and 1 deletions

View File

@@ -49,6 +49,18 @@ public:
BT_NONE, ///< No specialisation for either case.
};
/** Helper for using specialised functions designed to prevent whenever it's possible things like:
* - IO (reading video buffer),
* - calculations (alpha blending),
* - heavy branching (remap lookups and animation buffer handling).
*/
enum SpriteFlags {
SF_NONE = 0,
SF_TRANSLUCENT = 1 << 1, ///< The sprite has at least 1 translucent pixel.
SF_NO_REMAP = 1 << 2, ///< The sprite has no remappable colour pixel.
SF_NO_ANIM = 1 << 3, ///< The sprite has no palette animated pixel.
};
/** Data stored about a (single) sprite. */
struct SpriteInfo {
uint32 sprite_offset; ///< The offset to the sprite data.
@@ -57,6 +69,7 @@ public:
uint16 sprite_width; ///< The width of the sprite.
};
struct SpriteData {
SpriteFlags flags;
SpriteInfo infos[ZOOM_LVL_COUNT];
byte data[]; ///< Data, all zoomlevels.
};
@@ -64,6 +77,8 @@ public:
Sprite *Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator);
};
DECLARE_ENUM_AS_BIT_SET(Blitter_32bppSSE_Base::SpriteFlags);
/** The SSE2 32 bpp blitter (without palette animation). */
class Blitter_32bppSSE2 : public Blitter_32bppSimple, public Blitter_32bppSSE_Base {
public: