Atlas - SDL_naclopengles.c
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1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <[email protected]>
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 */
38int
39NACL_GLES_LoadLibrary(_THIS, const char *path)
40{
41    /* FIXME: Support dynamic linking when PNACL supports it */
42    return glInitializePPAPI(PSGetInterface) == 0;
43}
44
45void *
46NACL_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
55void
56NACL_GLES_UnloadLibrary(_THIS)
57{
58    /* FIXME: Support dynamic linking when PNACL supports it */
59    glTerminatePPAPI();
60}
61
62int
63NACL_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
72SDL_GLContext
73NACL_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
140int
141NACL_GLES_SetSwapInterval(_THIS, int interval)
142{
143    /* STUB */
144    return SDL_Unsupported();
145}
146
147int
148NACL_GLES_GetSwapInterval(_THIS)
149{
150    /* STUB */
151    return 0;
152}
153
154int
155NACL_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
165void
166NACL_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
[FILE END]
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