SDL  2.0
SDL_emscriptenopengles.c
Go to the documentation of this file.
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_EMSCRIPTEN && SDL_VIDEO_OPENGL_EGL
24 
25 #include <emscripten/emscripten.h>
26 #include <GLES2/gl2.h>
27 
28 #include "SDL_emscriptenvideo.h"
29 #include "SDL_emscriptenopengles.h"
30 
31 #define LOAD_FUNC(NAME) _this->egl_data->NAME = NAME;
32 
33 /* EGL implementation of SDL OpenGL support */
34 
35 int
36 Emscripten_GLES_LoadLibrary(_THIS, const char *path) {
37  /*we can't load EGL dynamically*/
38  _this->egl_data = (struct SDL_EGL_VideoData *) SDL_calloc(1, sizeof(SDL_EGL_VideoData));
39  if (!_this->egl_data) {
40  return SDL_OutOfMemory();
41  }
42 
43  LOAD_FUNC(eglGetDisplay);
44  LOAD_FUNC(eglInitialize);
45  LOAD_FUNC(eglTerminate);
46  LOAD_FUNC(eglGetProcAddress);
47  LOAD_FUNC(eglChooseConfig);
48  LOAD_FUNC(eglGetConfigAttrib);
49  LOAD_FUNC(eglCreateContext);
50  LOAD_FUNC(eglDestroyContext);
51  LOAD_FUNC(eglCreateWindowSurface);
52  LOAD_FUNC(eglDestroySurface);
53  LOAD_FUNC(eglMakeCurrent);
54  LOAD_FUNC(eglSwapBuffers);
55  LOAD_FUNC(eglSwapInterval);
56  LOAD_FUNC(eglWaitNative);
57  LOAD_FUNC(eglWaitGL);
58  LOAD_FUNC(eglBindAPI);
59 
60  _this->egl_data->egl_display = _this->egl_data->eglGetDisplay(EGL_DEFAULT_DISPLAY);
61  if (!_this->egl_data->egl_display) {
62  return SDL_SetError("Could not get EGL display");
63  }
64 
65  if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
66  return SDL_SetError("Could not initialize EGL");
67  }
68 
70 
71  if (path) {
73  } else {
74  *_this->gl_config.driver_path = '\0';
75  }
76 
77  return 0;
78 }
79 
80 void
81 Emscripten_GLES_DeleteContext(_THIS, SDL_GLContext context)
82 {
83  /*
84  WebGL contexts can't actually be deleted, so we need to reset it.
85  ES2 renderer resets state on init anyway, clearing the canvas should be enough
86  */
87 
89 
90  SDL_EGL_DeleteContext(_this, context);
91 }
92 
93 SDL_EGL_CreateContext_impl(Emscripten)
94 SDL_EGL_SwapWindow_impl(Emscripten)
95 SDL_EGL_MakeCurrent_impl(Emscripten)
96 
97 void
98 Emscripten_GLES_GetDrawableSize(_THIS, SDL_Window * window, int * w, int * h)
99 {
101  if (window->driverdata) {
102  data = (SDL_WindowData *) window->driverdata;
103 
104  if (w) {
105  *w = window->w * data->pixel_ratio;
106  }
107 
108  if (h) {
109  *h = window->h * data->pixel_ratio;
110  }
111  }
112 }
113 
114 #endif /* SDL_VIDEO_DRIVER_EMSCRIPTEN && SDL_VIDEO_OPENGL_EGL */
115 
116 /* vi: set ts=4 sw=4 expandtab: */
117 
#define SDL_strlcpy
#define GL_STENCIL_BUFFER_BIT
Definition: SDL_opengl.h:731
static SDL_Window * window
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1967
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
#define GL_DEPTH_BUFFER_BIT
Definition: SDL_opengl.h:729
static SDL_VideoDevice * _this
Definition: SDL_video.c:118
void * SDL_calloc(size_t nmemb, size_t size)
void * SDL_GLContext
An opaque handle to an OpenGL context.
Definition: SDL_video.h:172
#define _THIS
char driver_path[256]
Definition: SDL_sysvideo.h:329
GLAPI void GLAPIENTRY glClear(GLbitfield mask)
#define GL_COLOR_BUFFER_BIT
Definition: SDL_opengl.h:735
#define NULL
Definition: begin_code.h:143
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
#define SDL_SetError
The type used to identify a window.
Definition: SDL_sysvideo.h:71
struct SDL_VideoDevice::@28 gl_config
GLsizei const GLchar *const * path
GLubyte GLubyte GLubyte GLubyte w
void * driverdata
Definition: SDL_sysvideo.h:109
GLfloat GLfloat GLfloat GLfloat h