From 7f6002caba3f0a6749820c2772161caf55b8d267 Mon Sep 17 00:00:00 2001
From: neonloop
Date: Fri, 7 May 2021 20:00:12 +0000
Subject: Initial commit (uqm-0.8.0)

---
 src/libs/graphics/sdl/rotozoom.h | 96 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 src/libs/graphics/sdl/rotozoom.h

(limited to 'src/libs/graphics/sdl/rotozoom.h')

diff --git a/src/libs/graphics/sdl/rotozoom.h b/src/libs/graphics/sdl/rotozoom.h
new file mode 100644
index 0000000..728fd42
--- /dev/null
+++ b/src/libs/graphics/sdl/rotozoom.h
@@ -0,0 +1,96 @@
+/*  
+
+  rotozoom.h - rotozoomer for 32bit or 8bit surfaces
+  LGPL (c) A. Schiffler
+ 
+  Note by sc2 developers:
+  Taken from SDL_gfx library and modified, original code can be downloaded
+  from http://www.ferzkopp.net/Software/SDL_gfx-2.0/
+
+*/
+
+
+#ifndef ROTOZOOM_H
+#define ROTOZOOM_H
+
+#include <math.h>
+#ifndef M_PI
+#define M_PI	3.141592654
+#endif
+
+#include "port.h"
+#include SDL_INCLUDE(SDL.h)
+
+
+/* ---- Defines */
+
+#define SMOOTHING_OFF		0
+#define SMOOTHING_ON		1
+
+/* ---- Structures */
+
+typedef struct tColorRGBA {
+	Uint8 r;
+	Uint8 g;
+	Uint8 b;
+	Uint8 a;
+} tColorRGBA;
+
+typedef struct tColorY {
+	Uint8 y;
+} tColorY;
+
+
+/* ---- Prototypes */
+
+/*
+ zoomSurfaceRGBA()
+
+ Zoom the src surface into dst.  The zoom amount is determined
+ by the dimensions of src and dst
+
+*/
+int zoomSurfaceRGBA(SDL_Surface * src, SDL_Surface * dst, int smooth);
+
+/* 
+ 
+ rotozoomSurface()
+
+ Rotates and zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
+ 'angle' is the rotation in degrees. 'zoom' a scaling factor. If 'smooth' is 1
+ then the destination 32bit surface is anti-aliased. If the surface is not 8bit
+ or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
+
+*/
+
+SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom,
+							 int smooth);
+
+int rotateSurface(SDL_Surface * src, SDL_Surface * dst, double angle,
+				  int smooth);
+
+/* Returns the size of the target surface for a rotozoomSurface() call */
+
+void rotozoomSurfaceSize(int width, int height, double angle, double zoom,
+						 int *dstwidth, int *dstheight);
+
+/* 
+ 
+ zoomSurface()
+
+ Zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
+ 'zoomx' and 'zoomy' are scaling factors for width and height. If 'smooth' is 1
+ then the destination 32bit surface is anti-aliased. If the surface is not 8bit
+ or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
+
+*/
+
+SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy,
+						 int smooth);
+
+/* Returns the size of the target surface for a zoomSurface() call */
+
+void zoomSurfaceSize(int width, int height, double zoomx, double zoomy,
+					 int *dstwidth, int *dstheight);
+
+#endif
-- 
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