src/video/nacl/SDL_naclopengles.c

   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: */