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Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.

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Renamed SDL_RenderPoint() and SDL_RenderLine() to SDL_RenderDrawPoint() and SDL_RenderDrawLine().
Added API for rectangle drawing (as opposed to filling)
Added placeholder API functions for circles and ellipses ... I'm not sure whether these will stay.
Optimized software line drawing quite a bit.
Added support for Wu's anti-aliased line drawing, currently disabled by default.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404346
This commit is contained in:
Sam Lantinga 2009-12-23 01:55:00 +00:00
parent d45158ea85
commit 6da163ab81
24 changed files with 1685 additions and 549 deletions
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93
include/SDL_surface.h
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@ -411,12 +411,9 @@ extern DECLSPEC int SDLCALL SDL_DrawPoints
/**
* Blends a point with an RGBA value.
*
* The color should be a pixel of the format used by the surface, and
* can be generated by the SDL_MapRGB() function.
*
* \return 0 on success, or -1 on error.
*/
extern DECLSPEC int SDLCALL SDL_BlendDrawPoint
extern DECLSPEC int SDLCALL SDL_BlendPoint
(SDL_Surface * dst, int x, int y,
int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
extern DECLSPEC int SDLCALL SDL_BlendPoints
@ -464,9 +461,9 @@ extern DECLSPEC int SDLCALL SDL_DrawRects
(SDL_Surface * dst, const SDL_Rect ** rects, int count, Uint32 color);
/**
* Blends the given rectangle with \c color.
* Blends an RGBA value into the outline of the given rectangle.
*
* If \c rect is NULL, the whole surface will have a blended outline of \c color.
* If \c rect is NULL, the whole surface will have a blended outline.
*
* \return 0 on success, or -1 on error.
*/
@ -495,7 +492,7 @@ extern DECLSPEC int SDLCALL SDL_FillRects
/**
* Blends an RGBA value into the given rectangle.
*
* If \c rect is NULL, the whole surface will be blended with \c color.
* If \c rect is NULL, the whole surface will be blended with the color.
*
* \return This function returns 0 on success, or -1 on error.
*/
@ -506,6 +503,88 @@ extern DECLSPEC int SDLCALL SDL_BlendFillRects
(SDL_Surface * dst, const SDL_Rect ** rects, int count,
int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
#if 0
/**
* Draws the given circle with \c color.
*
* The color should be a pixel of the format used by the surface, and
* can be generated by the SDL_MapRGB() function.
*
* \return 0 on success, or -1 on error.
*/
extern DECLSPEC int SDLCALL SDL_DrawCircle
(SDL_Surface * dst, int x, int y, int radius, Uint32 color);
/**
* Blends an RGBA value into the outline of the given circle.
*
* \return 0 on success, or -1 on error.
*/
extern DECLSPEC int SDLCALL SDL_BlendCircle
(SDL_Surface * dst, int x, int y, int radius,
int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
/**
* Fills the given circle with \c color.
*
* The color should be a pixel of the format used by the surface, and
* can be generated by the SDL_MapRGB() function.
*
* \return 0 on success, or -1 on error.
*/
extern DECLSPEC int SDLCALL SDL_FillCircle
(SDL_Surface * dst, int x, int y, int radius, Uint32 color);
/**
* Blends an RGBA value into the given circle.
*
* \return This function returns 0 on success, or -1 on error.
*/
extern DECLSPEC int SDLCALL SDL_BlendFillCircle
(SDL_Surface * dst, int x, int y, int radius,
int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
/**
* Draws the given ellipse with \c color.
*
* The color should be a pixel of the format used by the surface, and
* can be generated by the SDL_MapRGB() function.
*
* \return 0 on success, or -1 on error.
*/
extern DECLSPEC int SDLCALL SDL_DrawEllipse
(SDL_Surface * dst, int x, int y, int w, int h, Uint32 color);
/**
* Blends an RGBA value into the outline of the given ellipse.
*
* \return 0 on success, or -1 on error.
*/
extern DECLSPEC int SDLCALL SDL_BlendEllipse
(SDL_Surface * dst, int x, int y, int w, int h,
int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
/**
* Fills the given ellipse with \c color.
*
* The color should be a pixel of the format used by the surface, and
* can be generated by the SDL_MapRGB() function.
*
* \return 0 on success, or -1 on error.
*/
extern DECLSPEC int SDLCALL SDL_FillEllipse
(SDL_Surface * dst, int x, int y, int w, int h, Uint32 color);
/**
* Blends an RGBA value into the given ellipse.
*
* \return This function returns 0 on success, or -1 on error.
*/
extern DECLSPEC int SDLCALL SDL_BlendFillEllipse
(SDL_Surface * dst, int x, int y, int w, int h,
int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
#endif // 0
/**
* Performs a fast blit from the source surface to the destination surface.
*