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_check_window(void *data, bool *quit,
bool *resize, unsigned *width, unsigned *height, bool is_shutdown)
{
EMSCRIPTEN_RESULT r;
int input_width;
int input_height;
emscripten_ctx_data_t *emscripten = (emscripten_ctx_data_t*)data;
gfx_ctx_emscripten_get_canvas_size(&input_width, &input_height);
if (input_width == 0 || input_height == 0)
{
input_width = emscripten_initial_width;
input_height = emscripten_initial_height;
emscripten->fb_width = emscripten->fb_height = 0;
}
*width = (unsigned)input_width;
*height = (unsigned)input_height;
*resize = false;
if (input_width != emscripten->fb_width ||
input_height != emscripten->fb_height)
{
r = emscripten_set_canvas_element_size("#canvas",
input_width, input_height);
if (r != EMSCRIPTEN_RESULT_SUCCESS)
RARCH_ERR("[EMSCRIPTEN/EGL]: error resizing canvas: %d\n", r);
/* fix Module.requestFullscreen messing with the canvas size */
r = emscripten_set_element_css_size("#canvas",
(double)input_width, (double)input_height);
if (r != EMSCRIPTEN_RESULT_SUCCESS)
RARCH_ERR("[EMSCRIPTEN/EGL]: error resizing canvas css: %d\n", r);
*resize = true;
}
emscripten->fb_width = (unsigned)input_width;
emscripten->fb_height = (unsigned)input_height;
*quit = false;
}
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});
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;
