diff --git a/app/src/input_manager.c b/app/src/input_manager.c index 14ee7e40..e8c8d68e 100644 --- a/app/src/input_manager.c +++ b/app/src/input_manager.c @@ -7,33 +7,6 @@ #include "util/lock.h" #include "util/log.h" -// Convert window coordinates (as provided by SDL_GetMouseState() to renderer -// coordinates (as provided in SDL mouse events) -// -// See my question: -// -static void -convert_to_renderer_coordinates(SDL_Renderer *renderer, int *x, int *y) { - SDL_Rect viewport; - float scale_x, scale_y; - SDL_RenderGetViewport(renderer, &viewport); - SDL_RenderGetScale(renderer, &scale_x, &scale_y); - *x = (int) (*x / scale_x) - viewport.x; - *y = (int) (*y / scale_y) - viewport.y; -} - -static struct point -get_mouse_point(struct screen *screen) { - int x; - int y; - SDL_GetMouseState(&x, &y); - convert_to_renderer_coordinates(screen->renderer, &x, &y); - return (struct point) { - .x = x, - .y = y, - }; -} - static const int ACTION_DOWN = 1; static const int ACTION_UP = 1 << 1; @@ -487,11 +460,17 @@ convert_touch(const SDL_TouchFingerEvent *from, struct screen *screen, to->inject_touch_event.pointer_id = from->fingerId; to->inject_touch_event.position.screen_size = screen->frame_size; + + int ww; + int wh; + SDL_GL_GetDrawableSize(screen->window, &ww, &wh); + // SDL touch event coordinates are normalized in the range [0; 1] - float x = from->x * screen->content_size.width; - float y = from->y * screen->content_size.height; + int32_t x = from->x * ww; + int32_t y = from->y * wh; to->inject_touch_event.position.point = screen_convert_to_frame_coords(screen, x, y); + to->inject_touch_event.pressure = from->pressure; to->inject_touch_event.buttons = 0; return true; @@ -508,13 +487,6 @@ input_manager_process_touch(struct input_manager *im, } } -static bool -is_outside_device_screen(struct input_manager *im, int x, int y) -{ - return x < 0 || x >= im->screen->content_size.width || - y < 0 || y >= im->screen->content_size.height; -} - static bool convert_mouse_button(const SDL_MouseButtonEvent *from, struct screen *screen, struct control_msg *to) { @@ -552,10 +524,15 @@ input_manager_process_mouse_button(struct input_manager *im, action_home(im->controller, ACTION_DOWN | ACTION_UP); return; } + // double-click on black borders resize to fit the device screen if (event->button == SDL_BUTTON_LEFT && event->clicks == 2) { - bool outside = - is_outside_device_screen(im, event->x, event->y); + int32_t x = event->x; + int32_t y = event->y; + screen_hidpi_scale_coords(im->screen, &x, &y); + SDL_Rect *r = &im->screen->rect; + bool outside = x < r->x || x >= r->x + r->w + || y < r->y || y >= r->y + r->h; if (outside) { screen_resize_to_fit(im->screen); return; @@ -579,9 +556,15 @@ input_manager_process_mouse_button(struct input_manager *im, static bool convert_mouse_wheel(const SDL_MouseWheelEvent *from, struct screen *screen, struct control_msg *to) { + + // mouse_x and mouse_y are expressed in pixels relative to the window + int mouse_x; + int mouse_y; + SDL_GetMouseState(&mouse_x, &mouse_y); + struct position position = { .screen_size = screen->frame_size, - .point = get_mouse_point(screen), + .point = screen_convert_to_frame_coords(screen, mouse_x, mouse_y), }; to->type = CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT; diff --git a/app/src/scrcpy.c b/app/src/scrcpy.c index e56ad84d..7f8d3c75 100644 --- a/app/src/scrcpy.c +++ b/app/src/scrcpy.c @@ -136,7 +136,7 @@ event_watcher(void *data, SDL_Event *event) { && event->window.event == SDL_WINDOWEVENT_RESIZED) { // In practice, it seems to always be called from the same thread in // that specific case. Anyway, it's just a workaround. - screen_render(&screen); + screen_render(&screen, true); } return 0; } diff --git a/app/src/screen.c b/app/src/screen.c index 566b2d99..967cf5d7 100644 --- a/app/src/screen.c +++ b/app/src/screen.c @@ -156,6 +156,43 @@ get_initial_optimal_size(struct size content_size, uint16_t req_width, return window_size; } +static void +screen_update_content_rect(struct screen *screen) { + int dw; + int dh; + SDL_GL_GetDrawableSize(screen->window, &dw, &dh); + + struct size content_size = screen->content_size; + // The drawable size is the window size * the HiDPI scale + struct size drawable_size = {dw, dh}; + + SDL_Rect *rect = &screen->rect; + + if (is_optimal_size(drawable_size, content_size)) { + rect->x = 0; + rect->y = 0; + rect->w = drawable_size.width; + rect->h = drawable_size.height; + return; + } + + bool keep_width = content_size.width * drawable_size.height + > content_size.height * drawable_size.width; + if (keep_width) { + rect->x = 0; + rect->w = drawable_size.width; + rect->h = drawable_size.width * content_size.height + / content_size.width; + rect->y = (drawable_size.height - rect->h) / 2; + } else { + rect->y = 0; + rect->h = drawable_size.height; + rect->w = drawable_size.height * content_size.width + / content_size.height; + rect->x = (drawable_size.width - rect->w) / 2; + } +} + void screen_init(struct screen *screen) { *screen = (struct screen) SCREEN_INITIALIZER; @@ -245,13 +282,6 @@ screen_init_rendering(struct screen *screen, const char *window_title, const char *renderer_name = r ? NULL : renderer_info.name; LOGI("Renderer: %s", renderer_name ? renderer_name : "(unknown)"); - if (SDL_RenderSetLogicalSize(screen->renderer, content_size.width, - content_size.height)) { - LOGE("Could not set renderer logical size: %s", SDL_GetError()); - screen_destroy(screen); - return false; - } - // starts with "opengl" screen->use_opengl = renderer_name && !strncmp(renderer_name, "opengl", 6); if (screen->use_opengl) { @@ -295,6 +325,8 @@ screen_init_rendering(struct screen *screen, const char *window_title, return false; } + screen_update_content_rect(screen); + return true; } @@ -365,18 +397,12 @@ screen_set_rotation(struct screen *screen, unsigned rotation) { struct size new_content_size = get_rotated_size(screen->frame_size, rotation); - if (SDL_RenderSetLogicalSize(screen->renderer, - new_content_size.width, - new_content_size.height)) { - LOGE("Could not set renderer logical size: %s", SDL_GetError()); - return; - } - set_content_size(screen, new_content_size); + screen->rotation = rotation; LOGI("Display rotation set to %u", rotation); - screen_render(screen); + screen_render(screen, true); } // recreate the texture and resize the window if the frame size has changed @@ -384,21 +410,17 @@ static bool prepare_for_frame(struct screen *screen, struct size new_frame_size) { if (screen->frame_size.width != new_frame_size.width || screen->frame_size.height != new_frame_size.height) { - struct size new_content_size = - get_rotated_size(new_frame_size, screen->rotation); - if (SDL_RenderSetLogicalSize(screen->renderer, - new_content_size.width, - new_content_size.height)) { - LOGE("Could not set renderer logical size: %s", SDL_GetError()); - return false; - } - // frame dimension changed, destroy texture SDL_DestroyTexture(screen->texture); - set_content_size(screen, new_content_size); screen->frame_size = new_frame_size; + struct size new_content_size = + get_rotated_size(new_frame_size, screen->rotation); + set_content_size(screen, new_content_size); + + screen_update_content_rect(screen); + LOGI("New texture: %" PRIu16 "x%" PRIu16, screen->frame_size.width, screen->frame_size.height); screen->texture = create_texture(screen); @@ -439,15 +461,19 @@ screen_update_frame(struct screen *screen, struct video_buffer *vb) { update_texture(screen, frame); mutex_unlock(vb->mutex); - screen_render(screen); + screen_render(screen, false); return true; } void -screen_render(struct screen *screen) { +screen_render(struct screen *screen, bool update_content_rect) { + if (update_content_rect) { + screen_update_content_rect(screen); + } + SDL_RenderClear(screen->renderer); if (screen->rotation == 0) { - SDL_RenderCopy(screen->renderer, screen->texture, NULL, NULL); + SDL_RenderCopy(screen->renderer, screen->texture, NULL, &screen->rect); } else { // rotation in RenderCopyEx() is clockwise, while screen->rotation is // counterclockwise (to be consistent with --lock-video-orientation) @@ -457,12 +483,14 @@ screen_render(struct screen *screen) { SDL_Rect *dstrect = NULL; SDL_Rect rect; if (screen->rotation & 1) { - struct size size = screen->content_size; - rect.x = (size.width - size.height) / 2; - rect.y = (size.height - size.width) / 2; - rect.w = size.height; - rect.h = size.width; + rect.x = screen->rect.x + (screen->rect.w - screen->rect.h) / 2; + rect.y = screen->rect.y + (screen->rect.h - screen->rect.w) / 2; + rect.w = screen->rect.h; + rect.h = screen->rect.w; dstrect = ▭ + } else { + assert(screen->rotation == 2); + dstrect = &screen->rect; } SDL_RenderCopyEx(screen->renderer, screen->texture, NULL, dstrect, @@ -485,7 +513,7 @@ screen_switch_fullscreen(struct screen *screen) { } LOGD("Switched to %s mode", screen->fullscreen ? "fullscreen" : "windowed"); - screen_render(screen); + screen_render(screen, true); } void @@ -523,10 +551,10 @@ screen_handle_window_event(struct screen *screen, const SDL_WindowEvent *event) { switch (event->event) { case SDL_WINDOWEVENT_EXPOSED: - screen_render(screen); + screen_render(screen, true); break; case SDL_WINDOWEVENT_SIZE_CHANGED: - screen_render(screen); + screen_render(screen, true); break; case SDL_WINDOWEVENT_MAXIMIZED: screen->maximized = true; @@ -552,6 +580,13 @@ screen_convert_to_frame_coords(struct screen *screen, int32_t x, int32_t y) { int32_t w = screen->content_size.width; int32_t h = screen->content_size.height; + + screen_hidpi_scale_coords(screen, &x, &y); + + x = (int64_t) (x - screen->rect.x) * w / screen->rect.w; + y = (int64_t) (y - screen->rect.y) * h / screen->rect.h; + + // rotate struct point result; switch (rotation) { case 0: @@ -574,3 +609,15 @@ screen_convert_to_frame_coords(struct screen *screen, int32_t x, int32_t y) { } return result; } + +void +screen_hidpi_scale_coords(struct screen *screen, int32_t *x, int32_t *y) { + // take the HiDPI scaling (dw/ww and dh/wh) into account + int ww, wh, dw, dh; + SDL_GetWindowSize(screen->window, &ww, &wh); + SDL_GL_GetDrawableSize(screen->window, &dw, &dh); + + // scale for HiDPI (64 bits for intermediate multiplications) + *x = (int64_t) *x * dw / ww; + *y = (int64_t) *y * dh / wh; +} diff --git a/app/src/screen.h b/app/src/screen.h index 7703b5a2..aa6218f7 100644 --- a/app/src/screen.h +++ b/app/src/screen.h @@ -29,6 +29,8 @@ struct screen { // client rotation: 0, 1, 2 or 3 (x90 degrees counterclockwise) unsigned rotation; + // rectangle of the content (excluding black borders) + struct SDL_Rect rect; bool has_frame; bool fullscreen; bool maximized; @@ -56,6 +58,12 @@ struct screen { .height = 0, \ }, \ .rotation = 0, \ + .rect = { \ + .x = 0, \ + .y = 0, \ + .w = 0, \ + .h = 0, \ + }, \ .has_frame = false, \ .fullscreen = false, \ .maximized = false, \ @@ -89,8 +97,11 @@ bool screen_update_frame(struct screen *screen, struct video_buffer *vb); // render the texture to the renderer +// +// Set the update_content_rect flag if the window or content size may have +// changed, so that the content rectangle is recomputed void -screen_render(struct screen *screen); +screen_render(struct screen *screen, bool update_content_rect); // switch the fullscreen mode void @@ -117,4 +128,11 @@ screen_handle_window_event(struct screen *screen, const SDL_WindowEvent *event); struct point screen_convert_to_frame_coords(struct screen *screen, int32_t x, int32_t y); +// Convert coordinates from window to drawable. +// Events are expressed in window coordinates, but content is expressed in +// drawable coordinates. They are the same if HiDPI scaling is 1, but differ +// otherwise. +void +screen_hidpi_scale_coords(struct screen *screen, int32_t *x, int32_t *y); + #endif