RetroArch/gfx/drivers_context/emscriptenegl_ctx.c
2015-03-15 02:47:23 +01:00

327 lines
7.6 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2012-2015 - Michael Lelli
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "../../driver.h"
#include "../../runloop.h"
#include "../video_context_driver.h"
#include "../gl_common.h"
#include "../video_monitor.h"
#ifdef HAVE_CONFIG_H
#include "../../config.h"
#endif
#include <stdint.h>
#include <unistd.h>
#include <emscripten/emscripten.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
static EGLContext g_egl_ctx;
static EGLSurface g_egl_surf;
static EGLDisplay g_egl_dpy;
static EGLConfig g_config;
static bool g_inited;
static unsigned g_fb_width;
static unsigned g_fb_height;
static void gfx_ctx_emscripten_swap_interval(void *data, unsigned interval)
{
(void)data;
/* no way to control VSync in WebGL. */
(void)interval;
}
static void gfx_ctx_emscripten_check_window(void *data, bool *quit,
bool *resize, unsigned *width, unsigned *height, unsigned frame_count)
{
int iWidth, iHeight, isFullscreen;
(void)data;
(void)frame_count;
emscripten_get_canvas_size(&iWidth, &iHeight, &isFullscreen);
*width = (unsigned) iWidth;
*height = (unsigned) iHeight;
*resize = false;
if (*width != g_fb_width || *height != g_fb_height)
*resize = true;
g_fb_width = (unsigned) iWidth;
g_fb_height = (unsigned) iHeight;
*quit = false;
}
static void gfx_ctx_emscripten_swap_buffers(void *data)
{
(void)data;
// no-op in emscripten, no way to force swap/wait for VSync in browsers
//eglSwapBuffers(g_egl_dpy, g_egl_surf);
}
static void gfx_ctx_emscripten_set_resize(void *data,
unsigned width, unsigned height)
{
(void)data;
(void)width;
(void)height;
}
static void gfx_ctx_emscripten_update_window_title(void *data)
{
char buf[128], buf_fps[128];
(void)data;
video_monitor_get_fps(buf, sizeof(buf),
buf_fps, sizeof(buf_fps));
if (g_settings.fps_show)
rarch_main_msg_queue_push(buf_fps, 1, 1, false);
}
static void gfx_ctx_emscripten_get_video_size(void *data,
unsigned *width, unsigned *height)
{
(void)data;
*width = g_fb_width;
*height = g_fb_height;
}
static void gfx_ctx_emscripten_destroy(void *data);
static bool gfx_ctx_emscripten_init(void *data)
{
EGLint width, height, num_config;
static const EGLint attribute_list[] =
{
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_NONE
};
static const EGLint context_attributes[] =
{
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
(void)data;
RARCH_LOG("[EMSCRIPTEN/EGL]: Initializing...\n");
if (g_inited)
{
RARCH_LOG("[EMSCRIPTEN/EGL]: Attempted to re-initialize driver.\n");
return true;
}
/* Get an EGL display connection. */
g_egl_dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (!g_egl_dpy)
goto error;
/* Initialize the EGL display connection. */
if (!eglInitialize(g_egl_dpy, NULL, NULL))
goto error;
/* Get an appropriate EGL frame buffer configuration. */
if (!eglChooseConfig(g_egl_dpy, attribute_list, &g_config, 1, &num_config))
goto error;
/* Create an EGL rendering context. */
g_egl_ctx = eglCreateContext(g_egl_dpy, g_config, EGL_NO_CONTEXT, context_attributes);
if (!g_egl_ctx)
goto error;
/* create an EGL window surface. */
g_egl_surf = eglCreateWindowSurface(g_egl_dpy, g_config, 0, NULL);
if (!g_egl_surf)
goto error;
/* Connect the context to the surface. */
if (!eglMakeCurrent(g_egl_dpy, g_egl_surf, g_egl_surf, g_egl_ctx))
goto error;
eglQuerySurface(g_egl_dpy, g_egl_surf, EGL_WIDTH, &width);
eglQuerySurface(g_egl_dpy, g_egl_surf, EGL_HEIGHT, &height);
g_fb_width = width;
g_fb_height = height;
RARCH_LOG("[EMSCRIPTEN/EGL]: Dimensions: %ux%u\n", width, height);
return true;
error:
gfx_ctx_emscripten_destroy(data);
return false;
}
static bool gfx_ctx_emscripten_set_video_mode(void *data,
unsigned width, unsigned height,
bool fullscreen)
{
(void)data;
if (g_inited)
return false;
g_inited = true;
return true;
}
static bool gfx_ctx_emscripten_bind_api(void *data,
enum gfx_ctx_api api, unsigned major, unsigned minor)
{
(void)data;
(void)major;
(void)minor;
switch (api)
{
case GFX_CTX_OPENGL_ES_API:
return eglBindAPI(EGL_OPENGL_ES_API);
default:
return false;
}
}
static void gfx_ctx_emscripten_destroy(void *data)
{
(void)data;
if (g_egl_dpy)
{
eglMakeCurrent(g_egl_dpy, EGL_NO_SURFACE,
EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (g_egl_ctx)
eglDestroyContext(g_egl_dpy, g_egl_ctx);
if (g_egl_surf)
eglDestroySurface(g_egl_dpy, g_egl_surf);
eglTerminate(g_egl_dpy);
}
g_egl_ctx = NULL;
g_egl_surf = NULL;
g_egl_dpy = NULL;
g_config = 0;
g_inited = false;
}
static void gfx_ctx_emscripten_input_driver(void *data,
const input_driver_t **input, void **input_data)
{
void *rwebinput = NULL;
(void)data;
*input = NULL;
rwebinput = input_rwebinput.init();
if (!rwebinput)
return;
*input = &input_rwebinput;
*input_data = rwebinput;
}
static bool gfx_ctx_emscripten_has_focus(void *data)
{
(void)data;
return g_inited;
}
static bool gfx_ctx_emscripten_suppress_screensaver(void *data, bool enable)
{
(void)data;
(void)enable;
return false;
}
static bool gfx_ctx_emscripten_has_windowed(void *data)
{
(void)data;
/* TODO -verify. */
return true;
}
static gfx_ctx_proc_t gfx_ctx_emscripten_get_proc_address(const char *symbol)
{
return eglGetProcAddress(symbol);
}
static float gfx_ctx_emscripten_translate_aspect(void *data,
unsigned width, unsigned height)
{
(void)data;
return (float)width / height;
}
static bool gfx_ctx_emscripten_init_egl_image_buffer(void *data,
const video_info_t *video)
{
(void)data;
return false;
}
static bool gfx_ctx_emscripten_write_egl_image(void *data,
const void *frame, unsigned width, unsigned height, unsigned pitch,
bool rgb32, unsigned index, void **image_handle)
{
(void)data;
return false;
}
const gfx_ctx_driver_t gfx_ctx_emscripten = {
gfx_ctx_emscripten_init,
gfx_ctx_emscripten_destroy,
gfx_ctx_emscripten_bind_api,
gfx_ctx_emscripten_swap_interval,
gfx_ctx_emscripten_set_video_mode,
gfx_ctx_emscripten_get_video_size,
NULL, /* get_video_output_size */
NULL, /* get_video_output_prev */
NULL, /* get_video_output_next */
NULL,
gfx_ctx_emscripten_translate_aspect,
gfx_ctx_emscripten_update_window_title,
gfx_ctx_emscripten_check_window,
gfx_ctx_emscripten_set_resize,
gfx_ctx_emscripten_has_focus,
gfx_ctx_emscripten_suppress_screensaver,
gfx_ctx_emscripten_has_windowed,
gfx_ctx_emscripten_swap_buffers,
gfx_ctx_emscripten_input_driver,
gfx_ctx_emscripten_get_proc_address,
gfx_ctx_emscripten_init_egl_image_buffer,
gfx_ctx_emscripten_write_egl_image,
NULL,
"emscripten",
};