Added management and drawing functions for ellipses and polygons.

Makefile.in

@@ -44,7 +44,7 @@ EMBEDSPU = @EMBEDSPU@
 
 DIST = acinclude autogen.sh Borland.html Borland.zip BUGS build-scripts configure configure.in COPYING CREDITS include INSTALL Makefile.minimal Makefile.in README* sdl-config.in sdl.m4 sdl.pc.in SDL.spec SDL.spec.in src test TODO VisualC.html VisualC VisualCE Watcom-Win32.zip WhatsNew Xcode Xcode-iPhoneOS
 
-HDRS = SDL.h SDL_assert.h SDL_atomic.h SDL_audio.h SDL_compat.h SDL_cpuinfo.h SDL_endian.h SDL_error.h SDL_events.h SDL_haptic.h SDL_joystick.h SDL_keyboard.h SDL_keysym.h SDL_loadso.h SDL_main.h SDL_mouse.h SDL_mutex.h SDL_name.h SDL_opengl.h SDL_opengles.h SDL_pixels.h SDL_platform.h SDL_power.h SDL_quit.h SDL_rect.h SDL_revision.h SDL_rwops.h SDL_scancode.h SDL_shape.h SDL_stdinc.h SDL_surface.h SDL_syswm.h SDL_thread.h SDL_timer.h SDL_types.h SDL_version.h SDL_video.h begin_code.h close_code.h
+HDRS = SDL.h SDL_assert.h SDL_atomic.h SDL_audio.h SDL_compat.h SDL_cpuinfo.h SDL_ellipse.h SDL_endian.h SDL_error.h SDL_events.h SDL_haptic.h SDL_joystick.h SDL_keyboard.h SDL_keysym.h SDL_loadso.h SDL_main.h SDL_mouse.h SDL_mutex.h SDL_name.h SDL_opengl.h SDL_opengles.h SDL_pixels.h SDL_platform.h SDL_poly.h SDL_power.h SDL_quit.h SDL_rect.h SDL_revision.h SDL_rwops.h SDL_scancode.h SDL_shape.h SDL_stdinc.h SDL_surface.h SDL_syswm.h SDL_thread.h SDL_timer.h SDL_types.h SDL_version.h SDL_video.h begin_code.h close_code.h
 
 LT_AGE      = @LT_AGE@
 LT_CURRENT  = @LT_CURRENT@

include/SDL_ellipse.h

+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 2010 Eli Gottlieb
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Eli Gottlieb
+    eligottlieb@gmail.com
+*/
+
+/**
+ *  \file SDL_ellipse.h
+ *  
+ *  Header file for SDL_ellipse definition and management functions.
+ */
+
+#ifndef _SDL_ellipse_h
+#define _SDL_ellipse_h
+
+#include "SDL_stdinc.h"
+#include "SDL_error.h"
+#include "SDL_pixels.h"
+#include "SDL_rwops.h"
+
+#include "begin_code.h"
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+extern "C" {
+/* *INDENT-ON* */
+#endif
+
+/**
+ *  \brief  The structure that defines an ellipse.
+ *
+ *  \sa SDL_EllipseEmpty
+ *  \sa SDL_EllipseEquals
+ *  \sa SDL_EllipsesIntersect
+ *  \sa SDL_IntersectEllipseAndLine
+ */
+typedef struct SDL_Ellipse {
+	int x,y;
+	int a,b;
+	int r;
+} SDL_Ellipse;
+
+/**
+ *  \brief Returns true if the ellipse has no area.
+ */
+#define SDL_EllipseEmpty(X)    ((X)->r <= 0)
+
+/**
+ *  \brief Returns true if the two ellipses are equal.
+ */
+#define SDL_EllipseEquals(A, B)   (((A)->x == (B)->x) && ((A)->y == (B)->y) && \
+                                ((A)->a == (B)->a) && ((A)->b == (B)->b) && ((A)->r == (B)->r))
+
+/**
+ *  \brief Determine whether two ellipses intersect.
+ *  
+ *  \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_EllipsesIntersect(const SDL_Ellipse * A,const SDL_Ellipse * B);
+
+/**
+ *  \brief Calculate the intersection of an ellipse and line segment.
+ *  
+ *  \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_IntersectEllipseAndLine(const SDL_Ellipse *ellipse,int *X1,int *Y1,int *X2,int *Y2);
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+}
+/* *INDENT-ON* */
+#endif
+#include "close_code.h"
+
+#endif /* _SDL_ellipse_h */

include/SDL_poly.h

+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 2010 Eli Gottlieb
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Eli Gottlieb
+    eligottlieb@gmail.com
+*/
+
+/**
+ *  \file SDL_poly.h
+ *  
+ *  Header file for SDL_poly definition and management functions.
+ */
+
+#ifndef _SDL_poly_h
+#define _SDL_poly_h
+
+#include "SDL_stdinc.h"
+#include "SDL_error.h"
+#include "SDL_pixels.h"
+#include "SDL_rwops.h"
+#include "SDL_rect.h"
+
+#include "begin_code.h"
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+extern "C" {
+/* *INDENT-ON* */
+#endif
+
+/**
+ *  \brief  The structure that defines an polygon.
+ *
+ *  \sa SDL_PolyEmpty
+ *  \sa SDL_PolyEquals
+ *  \sa SDL_PolysIntersect
+ *  \sa SDL_IntersectPoly
+ *  \sa SDL_WrapPoints
+ *  \sa SDL_IntersectPolyAndLine
+ */
+typedef struct SDL_Poly {
+	SDL_Point *vertices;
+	int count;
+} SDL_Poly;
+
+/**
+ *  \brief Returns true if the polygon has no area.
+ */
+#define SDL_PolyEmpty(X)    (((X)->vertices == NULL) || ((X)->count <= 2))
+
+/**
+ *  \brief Determine whether two polygons are equal.
+ *  
+ *  \return SDL_TRUE if the polygons are equal, SDL_FALSE otherwise.
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_PolyEquals(const SDL_Poly *A,const SDL_Poly *A);
+
+/**
+ *  \brief Determine whether two rectangles intersect.
+ *  
+ *  \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_PolysIntersect(const SDL_Poly * A,const SDL_Poly * B);
+
+/**
+ *  \brief Calculate the intersection of two rectangles.
+ *  
+ *  \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_IntersectPoly(const SDL_Poly * A,const SDL_Poly * B,SDL_Poly * result);
+
+/**
+ *  \brief Calculate a minimal polygon wrapping a set of points
+ *
+ *  \return 0 on success, -1 if the parameters were invalid, and -2 if an insufficient number of points were supplied
+ *          in the output polygon.
+ */
+extern DECLSPEC int SDLCALL SDL_WrapPoints(const SDL_Point * points,int count,SDL_Poly *result);
+
+/**
+ *  \brief Calculate the intersection of a polygon and line segment.
+ *  
+ *  \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_IntersectPolyAndLine(const SDL_Poly *poly,int *X1,int *Y1,int *X2,int *Y2);
+                                                   
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+}
+/* *INDENT-ON* */
+#endif
+#include "close_code.h"
+
+#endif /* _SDL_poly_h */

include/SDL_video.h

@@ -32,6 +32,8 @@
 #include "SDL_stdinc.h"
 #include "SDL_pixels.h"
 #include "SDL_rect.h"
+#include "SDL_ellipse.h"
+#include "SDL_poly.h"
 #include "SDL_surface.h"
 
 #include "begin_code.h"
@@ -1237,6 +1239,83 @@ extern DECLSPEC int SDLCALL SDL_RenderFillRect(const SDL_Rect * rect);
  */
 extern DECLSPEC int SDLCALL SDL_RenderFillRects(const SDL_Rect ** rect, int count);
 
+/**
+ *  \brief Draw an ellipse on the current rendering target with the drawing color.
+ *
+ *  \param ellipse The destination ellipse.
+ *
+ *  \return 0 on success, or -1 if there is no rendering context current.
+ */
+extern DECLSPEC int SDLCALL SDL_RenderDrawEllipse(const SDL_Ellipse ellipse);
+
+/**
+ *  \brief Draw some number of ellipses in the current rendering target with the drawing color.
+ *  
+ *  \param ellipse A pointer to an array of destination ellipses.
+ *  \param count The number of ellipses.
+ *  
+ *  \return 0 on success, or -1 if there is no rendering context current.
+ */
+extern DECLSPEC int SDLCALL SDL_RenderDrawEllipses(const SDL_Ellipse ** ellipse, int count);
+
+/**
+ *  \brief Fill an ellipse on the current rendering target with the drawing color.
+ *  
+ *  \param ellipse The destination ellipse
+ *  
+ *  \return 0 on success, or -1 if there is no rendering context current.
+ */
+extern DECLSPEC int SDLCALL SDL_RenderFillEllipse(const SDL_Ellipse ellipse);
+
+/**
+ *  \brief Fill some number of ellipses in the current rendering target with the drawing color.
+ *  
+ *  \param ellipse A pointer to an array of destination ellipses.
+ *  \param count The number of ellipses.
+ *  
+ *  \return 0 on success, or -1 if there is no rendering context current.
+ */
+extern DECLSPEC int SDLCALL SDL_RenderFillEllipses(const SDL_Ellipse ** ellipse, int count);
+
+/**
+ *  \brief Draw a polygon on the current rendering target with the drawing color.
+ *
+ *  \param poly The destination polygon.
+ *
+ *  \return 0 on success, or -1 if there is no rendering context current.
+ */
+extern DECLSPEC int SDLCALL SDL_RenderDrawPoly(const SDL_Poly poly);
+
+/**
+ *  \brief Draw some number of polygons in the current rendering target with the drawing color.
+ *  
+ *  \param poly A pointer to an array of destination polygons.
+ *  \param count The number of polygons.
+ *  
+ *  \return 0 on success, or -1 if there is no rendering context current.
+ */
+extern DECLSPEC int SDLCALL SDL_RenderDrawPolys(const SDL_Poly ** poly, int count);
+
+/**
+ *  \brief Fill a polygon on the current rendering target with the drawing color.
+ *  
+ *  \param poly The destination polygon
+ *  
+ *  \return 0 on success, or -1 if there is no rendering context current.
+ */
+extern DECLSPEC int SDLCALL SDL_RenderFillPoly(const SDL_Poly poly);
+
+/**
+ *  \brief Fill some number of polygons in the current rendering target with the drawing color.
+ *  
+ *  \param poly A pointer to an array of destination polygons.
+ *  \param count The number of polygons.
+ *  
+ *  \return 0 on success, or -1 if there is no rendering context current.
+ */
+extern DECLSPEC int SDLCALL SDL_RenderFillPolys(const SDL_Poly ** poly, int count);
+
+
 /**
  *  \brief Copy a portion of the texture to the current rendering target.
  *