6c578b5caa
The file scrcpy.c contains too many different things in addition to the main logic, so move the screen code to a separate file, screen.c.
291 lines
11 KiB
C
291 lines
11 KiB
C
#include "screen.h"
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#include <SDL2/SDL.h>
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#include <string.h>
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#include "icon.xpm"
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#include "tinyxpm.h"
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#define DISPLAY_MARGINS 96
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SDL_bool sdl_init_and_configure(void) {
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if (SDL_Init(SDL_INIT_VIDEO)) {
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SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION, "Could not initialize SDL: %s", SDL_GetError());
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return SDL_FALSE;
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}
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// FIXME it may crash in SDL_Quit in i965_dri.so
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// As a workaround, do not call SDL_Quit() (we are exiting anyway).
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// atexit(SDL_Quit);
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// Bilinear resizing
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if (!SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1")) {
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SDL_LogWarn(SDL_LOG_CATEGORY_VIDEO, "Could not enable bilinear filtering");
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}
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#if SDL_VERSION_ATLEAST(2, 0, 5)
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// Handle a click to gain focus as any other click
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if (!SDL_SetHint(SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, "1")) {
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SDL_LogWarn(SDL_LOG_CATEGORY_VIDEO, "Could not enable mouse focus clickthrough");
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}
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#endif
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return SDL_TRUE;
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}
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// get the window size in a struct size
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static struct size get_native_window_size(SDL_Window *window) {
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int width;
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int height;
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SDL_GetWindowSize(window, &width, &height);
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struct size size;
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size.width = width;
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size.height = height;
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return size;
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}
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// get the windowed window size
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static struct size get_window_size(const struct screen *screen) {
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if (screen->fullscreen) {
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return screen->windowed_window_size;
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}
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return get_native_window_size(screen->window);
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}
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// set the window size to be applied when fullscreen is disabled
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static void set_window_size(struct screen *screen, struct size new_size) {
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// setting the window size during fullscreen is implementation defined,
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// so apply the resize only after fullscreen is disabled
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if (screen->fullscreen) {
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// SDL_SetWindowSize will be called when fullscreen will be disabled
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screen->windowed_window_size = new_size;
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} else {
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SDL_SetWindowSize(screen->window, new_size.width, new_size.height);
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}
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}
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// get the preferred display bounds (i.e. the screen bounds with some margins)
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static SDL_bool get_preferred_display_bounds(struct size *bounds) {
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SDL_Rect rect;
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#if SDL_VERSION_ATLEAST(2, 0, 5)
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# define GET_DISPLAY_BOUNDS(i, r) SDL_GetDisplayUsableBounds((i), (r))
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#else
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# define GET_DISPLAY_BOUNDS(i, r) SDL_GetDisplayBounds((i), (r))
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#endif
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if (GET_DISPLAY_BOUNDS(0, &rect)) {
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SDL_LogWarn(SDL_LOG_CATEGORY_SYSTEM, "Could not get display usable bounds: %s", SDL_GetError());
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return SDL_FALSE;
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}
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bounds->width = MAX(0, rect.w - DISPLAY_MARGINS);
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bounds->height = MAX(0, rect.h - DISPLAY_MARGINS);
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return SDL_TRUE;
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}
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// return the optimal size of the window, with the following constraints:
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// - it attempts to keep at least one dimension of the current_size (i.e. it crops the black borders)
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// - it keeps the aspect ratio
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// - it scales down to make it fit in the display_size
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static struct size get_optimal_size(struct size current_size, struct size frame_size) {
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struct size display_size;
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// 32 bits because we need to multiply two 16 bits values
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Uint32 w;
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Uint32 h;
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if (!get_preferred_display_bounds(&display_size)) {
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// cannot get display bounds, do not constraint the size
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w = current_size.width;
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h = current_size.height;
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} else {
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w = MIN(current_size.width, display_size.width);
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h = MIN(current_size.height, display_size.height);
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}
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SDL_bool keep_width = frame_size.width * h > frame_size.height * w;
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if (keep_width) {
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// remove black borders on top and bottom
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h = frame_size.height * w / frame_size.width;
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} else {
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// remove black borders on left and right (or none at all if it already fits)
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w = frame_size.width * h / frame_size.height;
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}
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// w and h must fit into 16 bits
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SDL_assert_release(w < 0x10000 && h < 0x10000);
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return (struct size) {w, h};
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}
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// same as get_optimal_size(), but read the current size from the window
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static inline struct size get_optimal_window_size(const struct screen *screen, struct size frame_size) {
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struct size current_size = get_window_size(screen);
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return get_optimal_size(current_size, frame_size);
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}
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// initially, there is no current size, so use the frame size as current size
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static inline struct size get_initial_optimal_size(struct size frame_size) {
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return get_optimal_size(frame_size, frame_size);
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}
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void screen_init(struct screen *screen) {
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*screen = (struct screen) SCREEN_INITIALIZER;
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}
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SDL_bool screen_init_rendering(struct screen *screen, const char *device_name, struct size frame_size) {
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screen->frame_size = frame_size;
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struct size window_size = get_initial_optimal_size(frame_size);
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screen->window = SDL_CreateWindow(device_name, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
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window_size.width, window_size.height, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE);
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if (!screen->window) {
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SDL_LogCritical(SDL_LOG_CATEGORY_SYSTEM, "Could not create window: %s", SDL_GetError());
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return SDL_FALSE;
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}
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screen->renderer = SDL_CreateRenderer(screen->window, -1, SDL_RENDERER_ACCELERATED);
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if (!screen->renderer) {
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SDL_LogCritical(SDL_LOG_CATEGORY_RENDER, "Could not create renderer: %s", SDL_GetError());
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screen_destroy(screen);
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return SDL_FALSE;
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}
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if (SDL_RenderSetLogicalSize(screen->renderer, frame_size.width, frame_size.height)) {
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SDL_LogError(SDL_LOG_CATEGORY_RENDER, "Could not set renderer logical size: %s", SDL_GetError());
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screen_destroy(screen);
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return SDL_FALSE;
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}
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SDL_Surface *icon = read_xpm(icon_xpm);
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if (!icon) {
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SDL_LogError(SDL_LOG_CATEGORY_SYSTEM, "Could not load icon: %s", SDL_GetError());
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screen_destroy(screen);
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return SDL_FALSE;
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}
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SDL_SetWindowIcon(screen->window, icon);
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SDL_FreeSurface(icon);
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SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Initial texture: %" PRIu16 "x%" PRIu16, frame_size.width, frame_size.height);
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screen->texture = SDL_CreateTexture(screen->renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING,
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frame_size.width, frame_size.height);
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if (!screen->texture) {
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SDL_LogCritical(SDL_LOG_CATEGORY_RENDER, "Could not create texture: %s", SDL_GetError());
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screen_destroy(screen);
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return SDL_FALSE;
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}
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screen_render(screen);
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return SDL_TRUE;
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}
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void screen_destroy(struct screen *screen) {
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if (screen->texture) {
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SDL_DestroyTexture(screen->texture);
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}
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if (screen->renderer) {
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// FIXME it may crash at exit if we destroy the renderer or the window,
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// with the exact same stack trace as <https://bugs.launchpad.net/mir/+bug/1466535>.
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// As a workaround, leak the renderer and the window (we are exiting anyway).
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//SDL_DestroyRenderer(screen->renderer);
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}
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if (screen->window) {
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//SDL_DestroyWindow(screen->window);
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// at least we hide it
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SDL_HideWindow(screen->window);
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}
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}
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// recreate the texture and resize the window if the frame size has changed
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static SDL_bool prepare_for_frame(struct screen *screen, struct size new_frame_size) {
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if (screen->frame_size.width != new_frame_size.width || screen->frame_size.height != new_frame_size.height) {
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if (SDL_RenderSetLogicalSize(screen->renderer, new_frame_size.width, new_frame_size.height)) {
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SDL_LogError(SDL_LOG_CATEGORY_RENDER, "Could not set renderer logical size: %s", SDL_GetError());
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return SDL_FALSE;
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}
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// frame dimension changed, destroy texture
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SDL_DestroyTexture(screen->texture);
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struct size current_size = get_window_size(screen);
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struct size target_size = {
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(Uint32) current_size.width * new_frame_size.width / screen->frame_size.width,
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(Uint32) current_size.height * new_frame_size.height / screen->frame_size.height,
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};
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target_size = get_optimal_size(target_size, new_frame_size);
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set_window_size(screen, target_size);
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screen->frame_size = new_frame_size;
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SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "New texture: %" PRIu16 "x%" PRIu16,
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screen->frame_size.width, screen->frame_size.height);
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screen->texture = SDL_CreateTexture(screen->renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING,
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new_frame_size.width, new_frame_size.height);
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if (!screen->texture) {
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SDL_LogCritical(SDL_LOG_CATEGORY_RENDER, "Could not create texture: %s", SDL_GetError());
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return SDL_FALSE;
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}
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}
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return SDL_TRUE;
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}
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// write the frame into the texture
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static void update_texture(struct screen *screen, const AVFrame *frame) {
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screen->texture_initialized = SDL_TRUE;
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SDL_UpdateYUVTexture(screen->texture, NULL,
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frame->data[0], frame->linesize[0],
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frame->data[1], frame->linesize[1],
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frame->data[2], frame->linesize[2]);
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}
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SDL_bool screen_update(struct screen *screen, const AVFrame *frame) {
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struct size new_frame_size = {frame->width, frame->height};
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if (!prepare_for_frame(screen, new_frame_size)) {
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return SDL_FALSE;
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}
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update_texture(screen, frame);
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return SDL_TRUE;
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}
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void screen_render(struct screen *screen) {
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SDL_RenderClear(screen->renderer);
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if (screen->texture_initialized) {
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SDL_RenderCopy(screen->renderer, screen->texture, NULL, NULL);
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}
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SDL_RenderPresent(screen->renderer);
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}
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void screen_switch_fullscreen(struct screen *screen) {
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if (!screen->fullscreen) {
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// going to fullscreen, store the current windowed window size
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screen->windowed_window_size = get_native_window_size(screen->window);
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}
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Uint32 new_mode = screen->fullscreen ? 0 : SDL_WINDOW_FULLSCREEN_DESKTOP;
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if (SDL_SetWindowFullscreen(screen->window, new_mode)) {
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SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Could not switch fullscreen mode: %s", SDL_GetError());
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return;
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}
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screen->fullscreen = !screen->fullscreen;
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if (!screen->fullscreen) {
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// fullscreen disabled, restore expected windowed window size
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SDL_SetWindowSize(screen->window, screen->windowed_window_size.width, screen->windowed_window_size.height);
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}
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SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "Switched to %s mode", screen->fullscreen ? "fullscreen" : "windowed");
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screen_render(screen);
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}
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void screen_resize_to_fit(struct screen *screen) {
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if (!screen->fullscreen) {
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struct size optimal_size = get_optimal_window_size(screen, screen->frame_size);
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SDL_SetWindowSize(screen->window, optimal_size.width, optimal_size.height);
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SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "Resized to optimal size");
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}
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}
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void screen_resize_to_pixel_perfect(struct screen *screen) {
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if (!screen->fullscreen) {
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SDL_SetWindowSize(screen->window, screen->frame_size.width, screen->frame_size.height);
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SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "Resized to pixel-perfect");
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}
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}
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