SDL  2.0
SDL_windowsopengles.c
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../../SDL_internal.h"
22 
23 #if SDL_VIDEO_DRIVER_WINDOWS && SDL_VIDEO_OPENGL_EGL
24 
25 #include "SDL_windowsvideo.h"
26 #include "SDL_windowsopengles.h"
27 #include "SDL_windowsopengl.h"
28 #include "SDL_log.h"
29 
30 /* EGL implementation of SDL OpenGL support */
31 
32 int
33 WIN_GLES_LoadLibrary(_THIS, const char *path) {
34 
35  /* If the profile requested is not GL ES, switch over to WIN_GL functions */
37 #if SDL_VIDEO_OPENGL_WGL
38  WIN_GLES_UnloadLibrary(_this);
39  _this->GL_LoadLibrary = WIN_GL_LoadLibrary;
40  _this->GL_GetProcAddress = WIN_GL_GetProcAddress;
41  _this->GL_UnloadLibrary = WIN_GL_UnloadLibrary;
42  _this->GL_CreateContext = WIN_GL_CreateContext;
43  _this->GL_MakeCurrent = WIN_GL_MakeCurrent;
44  _this->GL_SetSwapInterval = WIN_GL_SetSwapInterval;
45  _this->GL_GetSwapInterval = WIN_GL_GetSwapInterval;
46  _this->GL_SwapWindow = WIN_GL_SwapWindow;
47  _this->GL_DeleteContext = WIN_GL_DeleteContext;
48  return WIN_GL_LoadLibrary(_this, path);
49 #else
50  return SDL_SetError("SDL not configured with OpenGL/WGL support");
51 #endif
52  }
53 
54  if (_this->egl_data == NULL) {
55  return SDL_EGL_LoadLibrary(_this, NULL, EGL_DEFAULT_DISPLAY, 0);
56  }
57 
58  return 0;
59 }
60 
62 WIN_GLES_CreateContext(_THIS, SDL_Window * window)
63 {
66 
69  /* Switch to WGL based functions */
70  WIN_GLES_UnloadLibrary(_this);
71  _this->GL_LoadLibrary = WIN_GL_LoadLibrary;
72  _this->GL_GetProcAddress = WIN_GL_GetProcAddress;
73  _this->GL_UnloadLibrary = WIN_GL_UnloadLibrary;
74  _this->GL_CreateContext = WIN_GL_CreateContext;
75  _this->GL_MakeCurrent = WIN_GL_MakeCurrent;
76  _this->GL_SetSwapInterval = WIN_GL_SetSwapInterval;
77  _this->GL_GetSwapInterval = WIN_GL_GetSwapInterval;
78  _this->GL_SwapWindow = WIN_GL_SwapWindow;
79  _this->GL_DeleteContext = WIN_GL_DeleteContext;
80 
81  if (WIN_GL_LoadLibrary(_this, NULL) != 0) {
82  return NULL;
83  }
84 
85  return WIN_GL_CreateContext(_this, window);
86  }
87 #endif
88 
89  context = SDL_EGL_CreateContext(_this, data->egl_surface);
90  return context;
91 }
92 
93 void
94 WIN_GLES_DeleteContext(_THIS, SDL_GLContext context)
95 {
96  SDL_EGL_DeleteContext(_this, context);
97  WIN_GLES_UnloadLibrary(_this);
98 }
99 
100 SDL_EGL_SwapWindow_impl(WIN)
101 SDL_EGL_MakeCurrent_impl(WIN)
102 
103 int
104 WIN_GLES_SetupWindow(_THIS, SDL_Window * window)
105 {
106  /* The current context is lost in here; save it and reset it. */
107  SDL_WindowData *windowdata = (SDL_WindowData *) window->driverdata;
108  SDL_Window *current_win = SDL_GL_GetCurrentWindow();
109  SDL_GLContext current_ctx = SDL_GL_GetCurrentContext();
110 
111 
112  if (_this->egl_data == NULL) {
113  if (SDL_EGL_LoadLibrary(_this, NULL, EGL_DEFAULT_DISPLAY, 0) < 0) {
114  SDL_EGL_UnloadLibrary(_this);
115  return -1;
116  }
117  }
118 
119  /* Create the GLES window surface */
120  windowdata->egl_surface = SDL_EGL_CreateSurface(_this, (NativeWindowType)windowdata->hwnd);
121 
122  if (windowdata->egl_surface == EGL_NO_SURFACE) {
123  return SDL_SetError("Could not create GLES window surface");
124  }
125 
126  return WIN_GLES_MakeCurrent(_this, current_win, current_ctx);
127 }
128 
129 #endif /* SDL_VIDEO_DRIVER_WINDOWS && SDL_VIDEO_OPENGL_EGL */
130 
131 /* vi: set ts=4 sw=4 expandtab: */
#define EGL_NO_SURFACE
Definition: egl.h:100
int(* GL_SetSwapInterval)(_THIS, int interval)
Definition: SDL_sysvideo.h:261
static screen_context_t context
Definition: video.c:25
set set set set set set set macro pixldst1 abits if abits op else op endif endm macro pixldst2 abits if abits op else op endif endm macro pixldst4 abits if abits op else op endif endm macro pixldst0 abits op endm macro pixldst3 mem_operand op endm macro pixldst30 mem_operand op endm macro pixldst abits if abits elseif abits elseif abits elseif abits elseif abits pixldst0 abits else pixldst0 abits pixldst0 abits pixldst0 abits pixldst0 abits endif elseif abits else pixldst0 abits pixldst0 abits endif elseif abits else error unsupported bpp *numpix else pixst endif endm macro pixld1_s mem_operand if asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl elseif asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl else error unsupported endif endm macro pixld2_s mem_operand if mov asr add asl add asl mov asr sub UNIT_X add asl mov asr add asl add asl mov asr add UNIT_X add asl else pixld1_s mem_operand pixld1_s mem_operand endif endm macro pixld0_s mem_operand if asr adds SRC_WIDTH_FIXED bpl add asl elseif asr adds SRC_WIDTH_FIXED bpl add asl endif endm macro pixld_s_internal mem_operand if mem_operand pixld2_s mem_operand pixdeinterleave basereg elseif mem_operand elseif mem_operand elseif mem_operand elseif mem_operand pixld0_s mem_operand else pixld0_s mem_operand pixld0_s mem_operand pixld0_s mem_operand pixld0_s mem_operand endif elseif mem_operand else pixld0_s mem_operand pixld0_s mem_operand endif elseif mem_operand else error unsupported mem_operand if bpp mem_operand endif endm macro vuzp8 reg2 vuzp d d &reg2 endm macro vzip8 reg2 vzip d d &reg2 endm macro pixdeinterleave basereg basereg basereg basereg basereg endif endm macro pixinterleave basereg basereg basereg basereg basereg endif endm macro PF boost_increment endif if endif PF tst PF addne PF subne PF cmp ORIG_W if endif if endif if endif PF subge ORIG_W PF subges if endif if endif if endif endif endm macro cache_preload_simple endif if dst_r_bpp pld [DST_R, #(PREFETCH_DISTANCE_SIMPLE *dst_r_bpp/8)] endif if mask_bpp pld if[MASK, #(PREFETCH_DISTANCE_SIMPLE *mask_bpp/8)] endif endif endm macro fetch_mask_pixblock pixld mask_basereg pixblock_size MASK endm macro ensure_destination_ptr_alignment process_pixblock_tail_head if beq irp local skip1(dst_w_bpp<=(lowbit *8)) &&((lowbit *8)<(pixblock_size *dst_w_bpp)) .if lowbit< 16 tst DST_R
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
int(* GL_LoadLibrary)(_THIS, const char *path)
Definition: SDL_sysvideo.h:255
#define EGL_DEFAULT_DISPLAY
Definition: egl.h:227
struct SDL_VideoDevice::@33 gl_config
static SDL_VideoDevice * _this
Definition: SDL_video.c:121
EGLNativeWindowType NativeWindowType
Definition: eglplatform.h:112
void * SDL_GLContext
An opaque handle to an OpenGL context.
Definition: SDL_video.h:193
SDL_GLContext(* GL_CreateContext)(_THIS, SDL_Window *window)
Definition: SDL_sysvideo.h:258
#define _THIS
int(* GL_MakeCurrent)(_THIS, SDL_Window *window, SDL_GLContext context)
Definition: SDL_sysvideo.h:259
#define SDL_VIDEO_OPENGL_WGL
void(* GL_UnloadLibrary)(_THIS)
Definition: SDL_sysvideo.h:257
#define NULL
Definition: begin_code.h:164
#define SDL_GL_GetCurrentContext
#define SDL_SetError
#define SDL_GL_GetCurrentWindow
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
int(* GL_SwapWindow)(_THIS, SDL_Window *window)
Definition: SDL_sysvideo.h:263
The type used to identify a window.
Definition: SDL_sysvideo.h:73
GLsizei const GLchar *const * path
void * driverdata
Definition: SDL_sysvideo.h:111
void(* GL_DeleteContext)(_THIS, SDL_GLContext context)
Definition: SDL_sysvideo.h:264
int(* GL_GetSwapInterval)(_THIS)
Definition: SDL_sysvideo.h:262
void *(* GL_GetProcAddress)(_THIS, const char *proc)
Definition: SDL_sysvideo.h:256
EGLSurface egl_surface