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Merge pull request #24040 from guilhermefelipecgs/implements_custom_mouse_cursor_for_javascript

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Implements OS_JavaScript::set_custom_mouse_cursor
This commit is contained in:
Leon Krause 2019-01-03 18:24:11 +01:00 committed by GitHub
commit c0fcf77b38
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 124 additions and 2 deletions
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125
platform/javascript/os_javascript.cpp
View file

@ -415,12 +415,129 @@ void OS_JavaScript::set_cursor_shape(CursorShape p_shape) {
ERR_FAIL_INDEX(p_shape, CURSOR_MAX);
if (get_mouse_mode() == MOUSE_MODE_VISIBLE) {
if (cursors[p_shape] != "") {
Vector<String> url = cursors[p_shape].split("?");
set_css_cursor(("url(\"" + url[0] + "\") " + url[1] + ", auto").utf8());
} else {
set_css_cursor(godot2dom_cursor(p_shape));
}
}
cursor_shape = p_shape;
if (get_mouse_mode() != MOUSE_MODE_HIDDEN)
set_css_cursor(godot2dom_cursor(cursor_shape));
}
void OS_JavaScript::set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot) {
if (p_cursor.is_valid()) {
Ref<Texture> texture = p_cursor;
Ref<AtlasTexture> atlas_texture = p_cursor;
Ref<Image> image;
Size2 texture_size;
Rect2 atlas_rect;
if (texture.is_valid()) {
image = texture->get_data();
}
if (!image.is_valid() && atlas_texture.is_valid()) {
texture = atlas_texture->get_atlas();
atlas_rect.size.width = texture->get_width();
atlas_rect.size.height = texture->get_height();
atlas_rect.position.x = atlas_texture->get_region().position.x;
atlas_rect.position.y = atlas_texture->get_region().position.y;
texture_size.width = atlas_texture->get_region().size.x;
texture_size.height = atlas_texture->get_region().size.y;
} else if (image.is_valid()) {
texture_size.width = texture->get_width();
texture_size.height = texture->get_height();
}
ERR_FAIL_COND(!texture.is_valid());
ERR_FAIL_COND(p_hotspot.x < 0 || p_hotspot.y < 0);
ERR_FAIL_COND(texture_size.width > 256 || texture_size.height > 256);
ERR_FAIL_COND(p_hotspot.x > texture_size.width || p_hotspot.y > texture_size.height);
image = texture->get_data();
ERR_FAIL_COND(!image.is_valid());
if (atlas_texture.is_valid())
image->crop_from_point(
atlas_rect.position.x,
atlas_rect.position.y,
texture_size.width,
texture_size.height);
if (image->get_format() != Image::FORMAT_RGBA8) {
image->convert(Image::FORMAT_RGBA8);
}
png_image png_meta;
memset(&png_meta, 0, sizeof png_meta);
png_meta.version = PNG_IMAGE_VERSION;
png_meta.width = texture_size.width;
png_meta.height = texture_size.height;
png_meta.format = PNG_FORMAT_RGBA;
PoolByteArray png;
size_t len;
PoolByteArray::Read r = image->get_data().read();
ERR_FAIL_COND(!png_image_write_get_memory_size(png_meta, len, 0, r.ptr(), 0, NULL));
png.resize(len);
PoolByteArray::Write w = png.write();
ERR_FAIL_COND(!png_image_write_to_memory(&png_meta, w.ptr(), &len, 0, r.ptr(), 0, NULL));
w = PoolByteArray::Write();
r = png.read();
char *object_url;
/* clang-format off */
EM_ASM({
var PNG_PTR = $0;
var PNG_LEN = $1;
var PTR = $2;
var png = new Blob([HEAPU8.slice(PNG_PTR, PNG_PTR + PNG_LEN)], { type: 'image/png' });
var url = URL.createObjectURL(png);
var length_bytes = lengthBytesUTF8(url) + 1;
var string_on_wasm_heap = _malloc(length_bytes);
setValue(PTR, string_on_wasm_heap, '*');
stringToUTF8(url, string_on_wasm_heap, length_bytes);
}, r.ptr(), len, &object_url);
/* clang-format on */
r = PoolByteArray::Read();
String url = String::utf8(object_url) + "?" + itos(p_hotspot.x) + " " + itos(p_hotspot.y);
/* clang-format off */
EM_ASM({ _free($0); }, object_url);
/* clang-format on */
if (cursors[p_shape] != "") {
/* clang-format off */
EM_ASM({
URL.revokeObjectURL(UTF8ToString($0).split('?')[0]);
}, cursors[p_shape].utf8().get_data());
/* clang-format on */
cursors[p_shape] = "";
}
cursors[p_shape] = url;
} else if (cursors[p_shape] != "") {
/* clang-format off */
EM_ASM({
URL.revokeObjectURL(UTF8ToString($0).split('?')[0]);
}, cursors[p_shape].utf8().get_data());
/* clang-format on */
cursors[p_shape] = "";
}
set_cursor_shape(cursor_shape);
}
void OS_JavaScript::set_mouse_mode(OS::MouseMode p_mode) {
@ -432,7 +549,9 @@ void OS_JavaScript::set_mouse_mode(OS::MouseMode p_mode) {
if (p_mode == MOUSE_MODE_VISIBLE) {
// set_css_cursor must be called before set_cursor_shape to make the cursor visible
set_css_cursor(godot2dom_cursor(cursor_shape));
set_cursor_shape(cursor_shape);
emscripten_exit_pointerlock();
} else if (p_mode == MOUSE_MODE_HIDDEN) {
@ -446,7 +565,9 @@ void OS_JavaScript::set_mouse_mode(OS::MouseMode p_mode) {
ERR_EXPLAIN("MOUSE_MODE_CAPTURED can only be entered from within an appropriate input callback");
ERR_FAIL_COND(result == EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED);
ERR_FAIL_COND(result != EMSCRIPTEN_RESULT_SUCCESS);
// set_css_cursor must be called before set_cursor_shape to make the cursor visible
set_css_cursor(godot2dom_cursor(cursor_shape));
set_cursor_shape(cursor_shape);
}
}

1
platform/javascript/os_javascript.h
View file

@ -50,6 +50,7 @@ class OS_JavaScript : public OS_Unix {
InputDefault *input;
Ref<InputEventKey> deferred_key_event;
CursorShape cursor_shape;
String cursors[CURSOR_MAX];
Point2 touches[32];
Point2i last_click_pos;