1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2020 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
NACL_GLES_LoadLibrary(_THIS,const char * path)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 *
NACL_GLES_GetProcAddress(_THIS,const char * proc)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
NACL_GLES_UnloadLibrary(_THIS)56 NACL_GLES_UnloadLibrary(_THIS)
57 {
58 /* FIXME: Support dynamic linking when PNACL supports it */
59 glTerminatePPAPI();
60 }
61
62 int
NACL_GLES_MakeCurrent(_THIS,SDL_Window * window,SDL_GLContext sdl_context)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
NACL_GLES_CreateContext(_THIS,SDL_Window * window)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
NACL_GLES_SetSwapInterval(_THIS,int interval)141 NACL_GLES_SetSwapInterval(_THIS, int interval)
142 {
143 /* STUB */
144 return SDL_Unsupported();
145 }
146
147 int
NACL_GLES_GetSwapInterval(_THIS)148 NACL_GLES_GetSwapInterval(_THIS)
149 {
150 /* STUB */
151 return 0;
152 }
153
154 int
NACL_GLES_SwapWindow(_THIS,SDL_Window * window)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 if (driverdata->ppb_graphics->SwapBuffers((PP_Resource) SDL_GL_GetCurrentContext(), callback ) != 0) {
160 return SDL_SetError("SwapBuffers failed");
161 }
162 return 0;
163 }
164
165 void
NACL_GLES_DeleteContext(_THIS,SDL_GLContext context)166 NACL_GLES_DeleteContext(_THIS, SDL_GLContext context)
167 {
168 SDL_VideoData *driverdata = (SDL_VideoData *) _this->driverdata;
169 driverdata->ppb_core->ReleaseResource((PP_Resource) context);
170 }
171
172 #endif /* SDL_VIDEO_DRIVER_NACL */
173
174 /* vi: set ts=4 sw=4 expandtab: */
175