int main(int argc, char **argv)
{
// For testing purposes, rename the canvas on the page to some arbitrary ID.
EM_ASM(document.getElementById('canvas').id = 'myCanvasId');
// Accessing #canvas should resize Module['canvas']
EMSCRIPTEN_RESULT r = emscripten_set_canvas_element_size("#canvas", 100, 200);
assert(r == EMSCRIPTEN_RESULT_SUCCESS);
int w, h;
r = emscripten_get_canvas_element_size("#canvas", &w, &h);
assert(r == EMSCRIPTEN_RESULT_SUCCESS);
assert(w == 100);
assert(h == 200);
w = h = 0;
// Check that we see the change via 'NULL'
r = emscripten_get_canvas_element_size(NULL, &w, &h);
assert(r == EMSCRIPTEN_RESULT_SUCCESS);
assert(w == 100);
assert(h == 200);
w = h = 0;
// Check that we see the change via 'mycanvasId'
r = emscripten_get_canvas_element_size("myCanvasId", &w, &h);
assert(r == EMSCRIPTEN_RESULT_SUCCESS);
assert(w == 100);
assert(h == 200);
// The following line will not work with OffscreenCanvas, that is covered in another test
int jsAgreesWithSize = EM_ASM_INT({return Module['canvas'].width == 100 && Module['canvas'].height == 200});
static void gfx_ctx_emscripten_get_canvas_size(int *width, int *height)
{
EmscriptenFullscreenChangeEvent fullscreen_status;
bool is_fullscreen = false;
EMSCRIPTEN_RESULT r = emscripten_get_fullscreen_status(&fullscreen_status);
if (r == EMSCRIPTEN_RESULT_SUCCESS)
{
if (fullscreen_status.isFullscreen)
{
is_fullscreen = true;
*width = fullscreen_status.screenWidth;
*height = fullscreen_status.screenHeight;
}
}
if (!is_fullscreen)
{
r = emscripten_get_canvas_element_size("#canvas", width, height);
if (r != EMSCRIPTEN_RESULT_SUCCESS)
{
RARCH_ERR("[EMSCRIPTEN/EGL]: Could not get screen dimensions: %d\n",
r);
*width = 800;
*height = 600;
}
}
}
static void *gfx_ctx_emscripten_init(video_frame_info_t *video_info,
void *video_driver)
{
#ifdef HAVE_EGL
unsigned width, height;
EGLint major, minor;
EGLint n;
static const EGLint attribute_list[] =
{
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_DEPTH_SIZE, 16,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_NONE
};
static const EGLint context_attributes[] =
{
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
#endif
emscripten_ctx_data_t *emscripten = (emscripten_ctx_data_t*)
calloc(1, sizeof(*emscripten));
if (!emscripten)
return NULL;
(void)video_driver;
if (emscripten_initial_width == 0 || emscripten_initial_height == 0)
emscripten_get_canvas_element_size("#canvas",
&emscripten_initial_width, &emscripten_initial_height);
#ifdef HAVE_EGL
if (g_egl_inited)
{
RARCH_LOG("[EMSCRIPTEN/EGL]: Attempted to re-initialize driver.\n");
return (void*)"emscripten";
}
if (!egl_init_context(&emscripten->egl, EGL_NONE,
(void *)EGL_DEFAULT_DISPLAY, &major, &minor, &n, attribute_list, NULL))
{
egl_report_error();
goto error;
}
if (!egl_create_context(&emscripten->egl, context_attributes))
{
egl_report_error();
goto error;
}
if (!egl_create_surface(&emscripten->egl, 0))
goto error;
egl_get_video_size(&emscripten->egl, &width, &height);
emscripten->fb_width = width;
emscripten->fb_height = height;
RARCH_LOG("[EMSCRIPTEN/EGL]: Dimensions: %ux%u\n", width, height);
#endif
return emscripten;
error:
gfx_ctx_emscripten_destroy(video_driver);
return NULL;
}
// Check that we see the change via 'mycanvasId'
r = emscripten_get_canvas_element_size("myCanvasId", &w, &h);
assert(r == EMSCRIPTEN_RESULT_SUCCESS);
assert(w == 100);
assert(h == 200);
// The following line will not work with OffscreenCanvas, that is covered in another test
int jsAgreesWithSize = EM_ASM_INT({return Module['canvas'].width == 100 && Module['canvas'].height == 200});
assert(jsAgreesWithSize);
// Accessing NULL should also resize Module['canvas']
r = emscripten_set_canvas_element_size(NULL, 101, 201);
assert(r == EMSCRIPTEN_RESULT_SUCCESS);
// Check that we see the change on the canvas (via the established #canvas)
r = emscripten_get_canvas_element_size("#canvas", &w, &h);
assert(r == EMSCRIPTEN_RESULT_SUCCESS);
assert(w == 101);
assert(h == 201);
w = h = 0;
// Check that we see the change via 'NULL'
r = emscripten_get_canvas_element_size(NULL, &w, &h);
assert(r == EMSCRIPTEN_RESULT_SUCCESS);
assert(w == 101);
assert(h == 201);
w = h = 0;
// Check that we see the change via 'mycanvasId'
r = emscripten_get_canvas_element_size("myCanvasId", &w, &h);
assert(r == EMSCRIPTEN_RESULT_SUCCESS);
