src/video/nacl/SDL_naclopengles.c
author Philipp Wiesemann <philipp.wiesemann@arcor.de>
Sun, 30 Oct 2016 21:01:33 +0100
changeset 10563 e3d84016cb79
parent 9998 f67cf37e9cd4
child 10695 e54fce44f677
permissions -rw-r--r--
Fixed outdated info in README.
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2016 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_NACL
    24 
    25 /* NaCl SDL video GLES 2 driver implementation */
    26 
    27 #include "SDL_video.h"
    28 #include "SDL_naclvideo.h"
    29 
    30 #if SDL_LOADSO_DLOPEN
    31 #include "dlfcn.h"
    32 #endif
    33 
    34 #include "ppapi/gles2/gl2ext_ppapi.h"
    35 #include "ppapi_simple/ps.h"
    36 
    37 /* GL functions */
    38 int
    39 NACL_GLES_LoadLibrary(_THIS, const char *path)
    40 {
    41     /* FIXME: Support dynamic linking when PNACL supports it */
    42     return glInitializePPAPI(PSGetInterface) == 0;
    43 }
    44 
    45 void *
    46 NACL_GLES_GetProcAddress(_THIS, const char *proc)
    47 {
    48 #if SDL_LOADSO_DLOPEN
    49     return dlsym( 0 /* RTLD_DEFAULT */, proc);
    50 #else
    51     return NULL;
    52 #endif
    53 }
    54 
    55 void
    56 NACL_GLES_UnloadLibrary(_THIS)
    57 {
    58     /* FIXME: Support dynamic linking when PNACL supports it */
    59     glTerminatePPAPI();
    60 }
    61 
    62 int
    63 NACL_GLES_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext sdl_context)
    64 {
    65     SDL_VideoData *driverdata = (SDL_VideoData *) _this->driverdata;
    66     /* FIXME: Check threading issues...otherwise use a hardcoded _this->context across all threads */
    67     driverdata->ppb_instance->BindGraphics(driverdata->instance, (PP_Resource) sdl_context);
    68     glSetCurrentContextPPAPI((PP_Resource) sdl_context);
    69     return 0;
    70 }
    71 
    72 SDL_GLContext
    73 NACL_GLES_CreateContext(_THIS, SDL_Window * window)
    74 {
    75     SDL_VideoData *driverdata = (SDL_VideoData *) _this->driverdata;
    76     PP_Resource context, share_context = 0;
    77     /* 64 seems nice. */
    78     Sint32 attribs[64];
    79     int i = 0;
    80     
    81     if (_this->gl_config.share_with_current_context) {
    82         share_context = (PP_Resource) SDL_GL_GetCurrentContext();
    83     }
    84 
    85     /* FIXME: Some ATTRIBS from PP_Graphics3DAttrib are not set here */
    86     
    87     attribs[i++] = PP_GRAPHICS3DATTRIB_WIDTH;
    88     attribs[i++] = window->w;
    89     attribs[i++] = PP_GRAPHICS3DATTRIB_HEIGHT;
    90     attribs[i++] = window->h;
    91     attribs[i++] = PP_GRAPHICS3DATTRIB_RED_SIZE;
    92     attribs[i++] = _this->gl_config.red_size;
    93     attribs[i++] = PP_GRAPHICS3DATTRIB_GREEN_SIZE;
    94     attribs[i++] = _this->gl_config.green_size;
    95     attribs[i++] = PP_GRAPHICS3DATTRIB_BLUE_SIZE;
    96     attribs[i++] = _this->gl_config.blue_size;
    97     
    98     if (_this->gl_config.alpha_size) {
    99         attribs[i++] = PP_GRAPHICS3DATTRIB_ALPHA_SIZE;
   100         attribs[i++] = _this->gl_config.alpha_size;
   101     }
   102     
   103     /*if (_this->gl_config.buffer_size) {
   104         attribs[i++] = EGL_BUFFER_SIZE;
   105         attribs[i++] = _this->gl_config.buffer_size;
   106     }*/
   107     
   108     attribs[i++] = PP_GRAPHICS3DATTRIB_DEPTH_SIZE;
   109     attribs[i++] = _this->gl_config.depth_size;
   110     
   111     if (_this->gl_config.stencil_size) {
   112         attribs[i++] = PP_GRAPHICS3DATTRIB_STENCIL_SIZE;
   113         attribs[i++] = _this->gl_config.stencil_size;
   114     }
   115     
   116     if (_this->gl_config.multisamplebuffers) {
   117         attribs[i++] = PP_GRAPHICS3DATTRIB_SAMPLE_BUFFERS;
   118         attribs[i++] = _this->gl_config.multisamplebuffers;
   119     }
   120     
   121     if (_this->gl_config.multisamplesamples) {
   122         attribs[i++] = PP_GRAPHICS3DATTRIB_SAMPLES;
   123         attribs[i++] = _this->gl_config.multisamplesamples;
   124     }
   125        
   126     attribs[i++] = PP_GRAPHICS3DATTRIB_NONE;
   127     
   128     context = driverdata->ppb_graphics->Create(driverdata->instance, share_context, attribs);
   129 
   130     if (context) {
   131         /* We need to make the context current, otherwise nothing works */
   132         SDL_GL_MakeCurrent(window, (SDL_GLContext) context);
   133     }
   134     
   135     return (SDL_GLContext) context;
   136 }
   137 
   138 
   139 
   140 int
   141 NACL_GLES_SetSwapInterval(_THIS, int interval)
   142 {
   143     /* STUB */
   144     return 0;
   145 }
   146 
   147 int
   148 NACL_GLES_GetSwapInterval(_THIS)
   149 {
   150     /* STUB */
   151     return 0;
   152 }
   153 
   154 void
   155 NACL_GLES_SwapWindow(_THIS, SDL_Window * window)
   156 {
   157     SDL_VideoData *driverdata = (SDL_VideoData *) _this->driverdata;
   158     struct PP_CompletionCallback callback = { NULL, 0, PP_COMPLETIONCALLBACK_FLAG_NONE };
   159     driverdata->ppb_graphics->SwapBuffers((PP_Resource) SDL_GL_GetCurrentContext(), callback );
   160 }
   161 
   162 void
   163 NACL_GLES_DeleteContext(_THIS, SDL_GLContext context)
   164 {
   165     SDL_VideoData *driverdata = (SDL_VideoData *) _this->driverdata;
   166     driverdata->ppb_core->ReleaseResource((PP_Resource) context);
   167 }
   168 
   169 #endif /* SDL_VIDEO_DRIVER_NACL */
   170 
   171 /* vi: set ts=4 sw=4 expandtab: */