diff options
author | Alon Zakai <alonzakai@gmail.com> | 2012-11-12 18:40:23 -0800 |
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committer | Alon Zakai <alonzakai@gmail.com> | 2012-11-12 18:40:23 -0800 |
commit | 8beb2562056702c3a7b057fa17ab496758cccb1e (patch) | |
tree | e3fbe670417fcb7f6414362bc569d5f0b7ac0a4d | |
parent | d58b4e8eedef1ce80fd0082024b80b911a0160cc (diff) |
zoomSurface support; fixes #673
-rw-r--r-- | src/library_sdl.js | 10 | ||||
-rw-r--r-- | system/include/SDL/SDL_rotozoom.h | 123 | ||||
-rwxr-xr-x | tests/runner.py | 4 | ||||
-rw-r--r-- | tests/sdl_rotozoom.c | 48 | ||||
-rw-r--r-- | tests/sdl_rotozoom.png | bin | 0 -> 338527 bytes |
5 files changed, 185 insertions, 0 deletions
diff --git a/src/library_sdl.js b/src/library_sdl.js index 4cb4ca6f..0969f738 100644 --- a/src/library_sdl.js +++ b/src/library_sdl.js @@ -966,6 +966,16 @@ var LibrarySDL = { return _SDL_UpperBlit(src, srcrect, dst, dstrect); }, + zoomSurface: function(src, x, y, smooth) { + var srcData = SDL.surfaces[src]; + var w = srcData.width*x; + var h = srcData.height*y; + var ret = SDL.makeSurface(w, h, srcData.flags, false, 'zoomSurface'); + var dstData = SDL.surfaces[ret]; + dstData.ctx.drawImage(srcData.canvas, 0, 0, w, h); + return ret; + }, + SDL_SetAlpha: function(surf, flag, alpha) { SDL.surfaces[surf].alpha = alpha; }, diff --git a/system/include/SDL/SDL_rotozoom.h b/system/include/SDL/SDL_rotozoom.h new file mode 100644 index 00000000..65b914a9 --- /dev/null +++ b/system/include/SDL/SDL_rotozoom.h @@ -0,0 +1,123 @@ +/* + +SDL_rotozoom.c: rotozoomer, zoomer and shrinker for 32bit or 8bit surfaces + +Copyright (C) 2001-2011 Andreas Schiffler + +This software is provided 'as-is', without any express or implied +warranty. In no event will the authors be held liable for any damages +arising from the use of this software. + +Permission is granted to anyone to use this software for any purpose, +including commercial applications, and to alter it and redistribute it +freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + + 3. This notice may not be removed or altered from any source + distribution. + +Andreas Schiffler -- aschiffler at ferzkopp dot net + +*/ + +#ifndef _SDL_rotozoom_h +#define _SDL_rotozoom_h + +#include <math.h> + +/* Set up for C function definitions, even when using C++ */ +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef M_PI +#define M_PI 3.141592654 +#endif + +#include "SDL.h" + + /* ---- Defines */ + + /*! + \brief Disable anti-aliasing (no smoothing). + */ +#define SMOOTHING_OFF 0 + + /*! + \brief Enable anti-aliasing (smoothing). + */ +#define SMOOTHING_ON 1 + + /* ---- Function Prototypes */ + +#ifdef _MSC_VER +# if defined(DLL_EXPORT) && !defined(LIBSDL_GFX_DLL_IMPORT) +# define SDL_ROTOZOOM_SCOPE __declspec(dllexport) +# else +# ifdef LIBSDL_GFX_DLL_IMPORT +# define SDL_ROTOZOOM_SCOPE __declspec(dllimport) +# endif +# endif +#endif +#ifndef SDL_ROTOZOOM_SCOPE +# define SDL_ROTOZOOM_SCOPE extern +#endif + + /* + + Rotozoom functions + + */ + + SDL_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth); + + SDL_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurfaceXY + (SDL_Surface * src, double angle, double zoomx, double zoomy, int smooth); + + + SDL_ROTOZOOM_SCOPE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth, + int *dstheight); + + SDL_ROTOZOOM_SCOPE void rotozoomSurfaceSizeXY + (int width, int height, double angle, double zoomx, double zoomy, + int *dstwidth, int *dstheight); + + /* + + Zooming functions + + */ + + SDL_ROTOZOOM_SCOPE SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth); + + SDL_ROTOZOOM_SCOPE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight); + + /* + + Shrinking functions + + */ + + SDL_ROTOZOOM_SCOPE SDL_Surface *shrinkSurface(SDL_Surface * src, int factorx, int factory); + + /* + + Specialized rotation functions + + */ + + SDL_ROTOZOOM_SCOPE SDL_Surface* rotateSurface90Degrees(SDL_Surface* src, int numClockwiseTurns); + + /* Ends C function definitions when using C++ */ +#ifdef __cplusplus +} +#endif + +#endif /* _SDL_rotozoom_h */ diff --git a/tests/runner.py b/tests/runner.py index 7523036b..3844845f 100755 --- a/tests/runner.py +++ b/tests/runner.py @@ -9261,6 +9261,10 @@ elif 'browser' in str(sys.argv): def test_sdl_maprgba(self): self.btest('sdl_maprgba.c', reference='sdl_maprgba.png', reference_slack=3) + def test_sdl_rotozoom(self): + shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'example.png')) + self.btest('sdl_rotozoom.c', reference='sdl_rotozoom.png', args=['--preload-file', 'example.png']) + def zzztest_sdl_canvas_palette_2(self): # XXX disabled until we have proper automation open(os.path.join(self.get_dir(), 'sdl_canvas_palette_2.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_canvas_palette_2.c')).read())) open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('Module[\'preRun\'] = function() { SDL.defaults.copyOnLock = false }') diff --git a/tests/sdl_rotozoom.c b/tests/sdl_rotozoom.c new file mode 100644 index 00000000..cb6295cc --- /dev/null +++ b/tests/sdl_rotozoom.c @@ -0,0 +1,48 @@ +#include "SDL/SDL.h" +#include "SDL/SDL_image.h" +#include "SDL/SDL_rotozoom.h" + +#ifdef EMSCRIPTEN +#include "emscripten.h" +#endif + +SDL_Surface *screen; +SDL_Surface *sprite[4]; + +void mainloop() { + int i; + SDL_Rect rect = { 0, 0, 100, 100 }; + for (i = 0; i < 4; i++) { + rect.x = i & 1 ? 200 : 0; + rect.y = i & 2 ? 200 : 0; + SDL_BlitSurface(sprite[i], 0, screen, &rect); + SDL_UpdateRect(screen, 0, 0, 0, 0); + } +} + +int main(int argc, char **argv) { + SDL_Init(SDL_INIT_VIDEO); + + screen = SDL_SetVideoMode(400, 400, 32, SDL_SWSURFACE); + + sprite[0] = IMG_Load("example.png"); + sprite[1] = SDL_CreateRGBSurface(SDL_SWSURFACE, 100, 100, 32, 0xFF000000, 0xFF0000, 0xFF00, 0xFF); + SDL_FillRect(sprite[1], 0, 0xA0A0A0A0); + sprite[2] = zoomSurface(sprite[0], 0.5, 0.5, SMOOTHING_ON); + sprite[3] = zoomSurface(sprite[1], 0.5, 0.5, SMOOTHING_ON); + + mainloop(); + +#ifndef EMSCRIPTEN + SDL_Event evt; + while (1) { + if (SDL_PollEvent(&evt) != 0 && evt.type == SDL_QUIT) break; + //mainloop(); + SDL_Delay(33); + } +#endif + + SDL_Quit(); + + return 1; +} diff --git a/tests/sdl_rotozoom.png b/tests/sdl_rotozoom.png Binary files differnew file mode 100644 index 00000000..83ec0589 --- /dev/null +++ b/tests/sdl_rotozoom.png |