RetroArch/gfx/context/emscriptenegl_ctx.c

269 lines
6.1 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
* Copyright (C) 2012 - 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/>.
*/
// VideoCore context, for Rasperry Pi.
#include "../../driver.h"
#include "../gfx_context.h"
#include "../gl_common.h"
#include "../gfx_common.h"
#ifdef HAVE_CONFIG_H
#include "../../config.h"
#endif
#include <stdint.h>
#include <unistd.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES/gl.h>
#include <SDL/SDL.h>
static EGLContext g_egl_ctx;
static EGLSurface g_egl_surf;
static EGLDisplay g_egl_dpy;
static EGLConfig g_config;
static bool g_quit;
static bool g_inited;
static unsigned g_fb_width;
static unsigned g_fb_height;
static void gfx_ctx_swap_interval(unsigned interval)
{
// no way to control vsync in WebGL
(void)interval;
}
static void gfx_ctx_check_window(bool *quit,
bool *resize, unsigned *width, unsigned *height, unsigned frame_count)
{
(void)frame_count;
(void)width;
(void)height;
*resize = false;
*quit = g_quit;
}
static void gfx_ctx_swap_buffers(void)
{
eglSwapBuffers(g_egl_dpy, g_egl_surf);
}
static void gfx_ctx_set_resize(unsigned width, unsigned height)
{
(void)width;
(void)height;
}
static void gfx_ctx_update_window_title(void)
{
char buf[128];
gfx_get_fps(buf, sizeof(buf), false);
}
static void gfx_ctx_get_video_size(unsigned *width, unsigned *height)
{
*width = g_fb_width;
*height = g_fb_height;
}
static void gfx_ctx_destroy(void);
static bool gfx_ctx_init(void)
{
EGLint width;
EGLint height;
RARCH_LOG("[VC/EMSCRIPTEN]: Initializing...\n");
if (g_inited)
{
RARCH_ERR("[VC/EMSCRIPTEN]: Attempted to re-initialize driver.\n");
return true;
}
EGLint 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
};
// 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("[VC/EMSCRIPTEN]: Dimensions: %ux%u\n", width, height);
return true;
error:
gfx_ctx_destroy();
return false;
}
static bool gfx_ctx_set_video_mode(
unsigned width, unsigned height,
bool fullscreen)
{
if (g_inited)
return false;
g_inited = true;
return true;
}
static bool gfx_ctx_bind_api(enum gfx_ctx_api api)
{
switch (api)
{
case GFX_CTX_OPENGL_ES_API:
return eglBindAPI(EGL_OPENGL_ES_API);
default:
return false;
}
}
static void gfx_ctx_destroy(void)
{
if (g_egl_dpy)
{
if (g_egl_ctx)
{
eglMakeCurrent(g_egl_dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroyContext(g_egl_dpy, g_egl_ctx);
}
if (g_egl_surf)
{
eglDestroySurface(g_egl_dpy, g_egl_surf);
}
eglMakeCurrent(g_egl_dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglMakeCurrent(g_egl_dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
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_input_driver(const input_driver_t **input, void **input_data)
{
*input = NULL;
if (SDL_Init(SDL_INIT_VIDEO) != 0)
return;
void *sdlinput = input_sdl.init();
if (sdlinput)
{
*input = &input_sdl;
*input_data = sdlinput;
}
}
static bool gfx_ctx_has_focus(void)
{
return g_inited;
}
static gfx_ctx_proc_t gfx_ctx_get_proc_address(const char *symbol)
{
return SDL_GL_GetProcAddress(symbol);
}
static float gfx_ctx_translate_aspect(unsigned width, unsigned height)
{
return (float)width / height;
}
static bool gfx_ctx_init_egl_image_buffer(const video_info_t *video)
{
return false;
}
static bool gfx_ctx_write_egl_image(const void *frame, unsigned width, unsigned height, unsigned pitch, bool rgb32, unsigned index, void **image_handle)
{
return false;
}
const gfx_ctx_driver_t gfx_ctx_emscripten = {
gfx_ctx_init,
gfx_ctx_destroy,
gfx_ctx_bind_api,
gfx_ctx_swap_interval,
gfx_ctx_set_video_mode,
gfx_ctx_get_video_size,
gfx_ctx_translate_aspect,
gfx_ctx_update_window_title,
gfx_ctx_check_window,
gfx_ctx_set_resize,
gfx_ctx_has_focus,
gfx_ctx_swap_buffers,
gfx_ctx_input_driver,
gfx_ctx_get_proc_address,
gfx_ctx_init_egl_image_buffer,
gfx_ctx_write_egl_image,
NULL,
"emscripten",
};