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|
/* Copyright (c) 2017 imv authors
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "imv.h"
#include <getopt.h>
#include <limits.h>
#include <stdlib.h>
#include <stdbool.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_ttf.h>
#include "commands.h"
#include "list.h"
#include "loader.h"
#include "texture.h"
#include "navigator.h"
#include "viewport.h"
#include "util.h"
enum scaling_mode {
SCALING_NONE,
SCALING_DOWN,
SCALING_FULL,
SCALING_MODE_COUNT
};
static const char *scaling_label[] = {
"actual size",
"best fit",
"perfect fit"
};
enum background_type {
BACKGROUND_SOLID,
BACKGROUND_CHEQUERED,
BACKGROUND_TYPE_COUNT
};
struct imv {
bool quit;
bool fullscreen;
bool overlay_enabled;
bool nearest_neighbour;
bool need_redraw;
bool need_rescale;
bool recursive_load;
bool cycle_input;
bool list_at_exit;
enum scaling_mode scaling_mode;
enum background_type background_type;
struct { unsigned char r, g, b; } background_color;
unsigned long slideshow_image_duration;
unsigned long slideshow_time_elapsed;
char *font_name;
struct imv_navigator *navigator;
struct imv_loader *loader;
struct imv_commands *commands;
struct imv_texture *texture;
struct imv_viewport *view;
char *input_buffer;
char *starting_path;
SDL_Window *window;
SDL_Renderer *renderer;
TTF_Font *font;
SDL_Texture *background_texture;
bool sdl_init;
bool ttf_init;
};
void command_quit(struct imv_list *args, void *data);
void command_pan(struct imv_list *args, void *data);
void command_select_rel(struct imv_list *args, void *data);
void command_select_abs(struct imv_list *args, void *data);
void command_zoom(struct imv_list *args, void *data);
void command_remove(struct imv_list *args, void *data);
void command_fullscreen(struct imv_list *args, void *data);
void command_overlay(struct imv_list *args, void *data);
static bool setup_window(struct imv *imv);
static void handle_event(struct imv *imv, SDL_Event *event);
static void render_window(struct imv *imv);
struct imv *imv_create(void)
{
struct imv *imv = malloc(sizeof(struct imv));
imv->quit = false;
imv->fullscreen = false;
imv->overlay_enabled = false;
imv->nearest_neighbour = false;
imv->need_redraw = true;
imv->need_rescale = true;
imv->recursive_load = false;
imv->scaling_mode = SCALING_NONE;
imv->cycle_input = true;
imv->list_at_exit = false;
imv->background_color.r = imv->background_color.g = imv->background_color.b = 0;
imv->slideshow_image_duration = 0;
imv->slideshow_time_elapsed = 0;
imv->font_name = strdup("Monospace:24");
imv->navigator = imv_navigator_create();
imv->loader = imv_loader_create();
imv->commands = imv_commands_create();
imv->input_buffer = NULL;
imv->starting_path = NULL;
imv->window = NULL;
imv->renderer = NULL;
imv->font = NULL;
imv->background_texture = NULL;
imv->sdl_init = false;
imv->ttf_init = false;
imv_command_register(imv->commands, "quit", &command_quit);
imv_command_register(imv->commands, "pan", &command_pan);
imv_command_register(imv->commands, "select_rel", &command_select_rel);
imv_command_register(imv->commands, "select_abs", &command_select_abs);
imv_command_register(imv->commands, "zoom", &command_zoom);
imv_command_register(imv->commands, "remove", &command_remove);
imv_command_register(imv->commands, "fullscreen", &command_fullscreen);
imv_command_register(imv->commands, "overlay", &command_overlay);
imv_command_alias(imv->commands, "q", "quit");
imv_command_alias(imv->commands, "next", "select_rel 1");
imv_command_alias(imv->commands, "previous", "select_rel -1");
imv_command_alias(imv->commands, "n", "select_rel 1");
imv_command_alias(imv->commands, "p", "select_rel -1");
return imv;
}
void imv_free(struct imv *imv)
{
free(imv->font_name);
imv_navigator_free(imv->navigator);
imv_loader_free(imv->loader);
imv_commands_free(imv->commands);
if(imv->input_buffer) {
free(imv->input_buffer);
}
if(imv->renderer) {
SDL_DestroyRenderer(imv->renderer);
}
if(imv->window) {
SDL_DestroyWindow(imv->window);
}
if(imv->background_texture) {
SDL_DestroyTexture(imv->background_texture);
}
if(imv->font) {
TTF_CloseFont(imv->font);
}
if(imv->ttf_init) {
TTF_Quit();
}
if(imv->sdl_init) {
SDL_Quit();
}
free(imv);
}
bool imv_parse_args(struct imv *imv, int argc, char **argv)
{
/* Do not print getopt errors */
opterr = 0;
char *argp, *ep = *argv;
int o;
while((o = getopt(argc, argv, "frasSudxhln:b:e:t:")) != -1) {
switch(o) {
case 'f': imv->fullscreen = true; break;
case 'r': imv->recursive_load = true; break;
case 'a': imv->scaling_mode = SCALING_NONE; break;
case 's': imv->scaling_mode = SCALING_DOWN; break;
case 'S': imv->scaling_mode = SCALING_FULL; break;
case 'u': imv->nearest_neighbour = true; break;
case 'd': imv->overlay_enabled = true; break;
case 'x': imv->cycle_input = false; break;
case 'l': imv->list_at_exit = true; break;
case 'n': imv->starting_path = optarg; break;
case 'e': imv->font_name = strdup(optarg); break;
case 'h':
fprintf(stdout,
"imv %s\n"
"See manual for usage information.\n"
"\n"
"Legal:\n"
"This program is free software; you can redistribute it and/or\n"
"modify it under the terms of the GNU General Public License\n"
"as published by the Free Software Foundation; either version 2\n"
"of the License, or (at your option) any later version.\n"
"\n"
"This software uses the FreeImage open source image library.\n"
"See http://freeimage.sourceforge.net for details.\n"
"FreeImage is used under the GNU GPLv2.\n"
, IMV_VERSION);
imv->quit = true;
return true;
case 'b':
if(strcmp("checks", optarg) == 0) {
imv->background_type = BACKGROUND_CHEQUERED;
} else {
imv->background_type = BACKGROUND_SOLID;
argp = (*optarg == '#') ? optarg + 1 : optarg;
uint32_t n = strtoul(argp, &ep, 16);
if(*ep != '\0' || ep - argp != 6 || n > 0xFFFFFF) {
fprintf(stderr, "Invalid hex color: '%s'\n", optarg);
return false;
}
imv->background_color.b = n & 0xFF;
imv->background_color.g = (n >> 8) & 0xFF;
imv->background_color.r = (n >> 16);
}
break;
case 't':
imv->slideshow_image_duration = strtoul(optarg, &argp, 10);
imv->slideshow_image_duration *= 1000;
if (*argp == '.') {
long delay = strtoul(++argp, &ep, 10);
for (int i = 3 - (ep - argp); i; i--) {
delay *= 10;
}
if (delay < 1000) {
imv->slideshow_image_duration += delay;
} else {
imv->slideshow_image_duration = ULONG_MAX;
}
}
if (imv->slideshow_image_duration == ULONG_MAX) {
fprintf(stderr, "Wrong slideshow delay '%s'. Aborting.\n", optarg);
return false;
}
break;
case '?':
fprintf(stderr, "Unknown argument '%c'. Aborting.\n", optopt);
return false;
}
}
argc -= optind;
argv += optind;
/* TODO parse paths ? */
return true;
}
void imv_add_path(struct imv *imv, const char *path)
{
imv_navigator_add(imv->navigator, path, imv->recursive_load);
}
bool imv_run(struct imv *imv)
{
if(!setup_window(imv))
return false;
imv->quit = 0;
/* cache current image's dimensions */
int iw = 0;
int ih = 0;
while(!imv->quit) {
SDL_Event e;
while(!imv->quit && SDL_PollEvent(&e)) {
handle_event(imv, &e);
}
/* if we're quitting, don't bother drawing any more images */
if(imv->quit) {
break;
}
/* check if an image failed to load, if so, remove it from our image list */
char *err_path = imv_loader_get_error(imv->loader);
if(err_path) {
imv_navigator_remove(imv->navigator, err_path);
/* special case: the image came from stdin */
/* if (strncmp(err_path, "-", 2) == 0) { */
/* free(stdin_buffer); */
/* stdin_buffer_size = 0; */
/* if (stdin_error != 0) { */
/* errno = stdin_error; */
/* perror("Failed to load image from standard input"); */
/* errno = 0; */
/* } */
/* } */
free(err_path);
}
/* Check if navigator wrapped around paths lists */
if(!imv->cycle_input && imv_navigator_wrapped(imv->navigator)) {
break;
}
/* if the user has changed image, start loading the new one */
if(imv_navigator_poll_changed(imv->navigator)) {
const char *current_path = imv_navigator_selection(imv->navigator);
if(!current_path) {
/* if(!imv->stdin_list) { */
fprintf(stderr, "No input files left. Exiting.\n");
imv->quit = 1;
/* } */
continue;
}
char title[1024];
snprintf(title, sizeof(title), "imv - [%i/%i] [LOADING] %s [%s]",
imv->navigator->cur_path + 1, imv->navigator->num_paths, current_path,
scaling_label[imv->scaling_mode]);
imv_viewport_set_title(imv->view, title);
imv_loader_load(imv->loader, current_path, "", 0 /*stdin_buffer, stdin_buffer_size*/);
imv->view->playing = 1;
}
/* check if a new image is available to display */
FIBITMAP *bmp;
int is_new_image;
if(imv_loader_get_image(imv->loader, &bmp, &is_new_image)) {
imv_texture_set_image(imv->texture, bmp);
iw = FreeImage_GetWidth(bmp);
ih = FreeImage_GetHeight(bmp);
FreeImage_Unload(bmp);
imv->need_redraw = 1;
imv->need_rescale += is_new_image;
}
if(imv->need_rescale) {
int ww, wh;
SDL_GetWindowSize(imv->window, &ww, &wh);
imv->need_rescale = 0;
if(imv->scaling_mode == SCALING_NONE ||
(imv->scaling_mode == SCALING_DOWN && ww > iw && wh > ih)) {
imv_viewport_scale_to_actual(imv->view, imv->texture);
} else {
imv_viewport_scale_to_window(imv->view, imv->texture);
}
}
if(imv->need_redraw) {
render_window(imv);
SDL_RenderPresent(imv->renderer);
}
/* sleep a little bit so we don't waste CPU time */
SDL_Delay(10);
}
return 0;
}
static bool setup_window(struct imv *imv)
{
if(SDL_Init(SDL_INIT_VIDEO) != 0) {
fprintf(stderr, "SDL Failed to Init: %s\n", SDL_GetError());
return false;
}
imv->sdl_init = true;
/* width and height arbitrarily chosen. Perhaps there's a smarter way to
* set this */
const int width = 1280;
const int height = 720;
imv->window = SDL_CreateWindow(
"imv",
SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED,
width, height,
SDL_WINDOW_RESIZABLE);
if(!imv->window) {
fprintf(stderr, "SDL Failed to create window: %s\n", SDL_GetError());
return false;
}
/* we'll use SDL's built-in renderer, hardware accelerated if possible */
imv->renderer = SDL_CreateRenderer(imv->window, -1, 0);
if(!imv->renderer) {
fprintf(stderr, "SDL Failed to create renderer: %s\n", SDL_GetError());
return false;
}
/* use the appropriate resampling method */
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY,
imv->nearest_neighbour ? "0" : "1");
/* construct a chequered background texture */
if(imv->background_type == BACKGROUND_CHEQUERED) {
imv->background_texture = create_chequered(imv->renderer);
}
/* set up the required fonts and surfaces for displaying the overlay */
TTF_Init();
imv->ttf_init = true;
imv->font = load_font(imv->font_name);
if(!imv->font) {
fprintf(stderr, "Error loading font: %s\n", TTF_GetError());
return false;
}
imv->texture = imv_texture_create(imv->renderer);
imv->view = imv_viewport_create(imv->window);
/* put us in fullscren mode to begin with if requested */
if(imv->fullscreen) {
imv_viewport_toggle_fullscreen(imv->view);
}
/* start outside of command mode */
SDL_StopTextInput();
return true;
}
static void handle_event(struct imv *imv, SDL_Event *event)
{
const int command_buffer_len = 1024;
switch(event->type) {
case SDL_QUIT:
imv_command_exec(imv->commands, "quit", imv);
break;
case SDL_TEXTINPUT:
strncat(imv->input_buffer, event->text.text, command_buffer_len - 1);
imv->need_redraw = true;
break;
case SDL_KEYDOWN:
SDL_ShowCursor(SDL_DISABLE);
if(imv->input_buffer) {
/* in command mode, update the buffer */
if(event->key.keysym.sym == SDLK_ESCAPE) {
SDL_StopTextInput();
free(imv->input_buffer);
imv->input_buffer = NULL;
imv->need_redraw = true;
} else if(event->key.keysym.sym == SDLK_RETURN) {
imv_command_exec(imv->commands, imv->input_buffer, imv);
SDL_StopTextInput();
free(imv->input_buffer);
imv->input_buffer = NULL;
imv->need_redraw = true;
} else if(event->key.keysym.sym == SDLK_BACKSPACE) {
const size_t len = strlen(imv->input_buffer);
if(len > 0) {
imv->input_buffer[len - 1] = '\0';
imv->need_redraw = true;
}
}
return;
}
switch (event->key.keysym.sym) {
case SDLK_SEMICOLON:
if(event->key.keysym.mod & KMOD_SHIFT) {
SDL_StartTextInput();
imv->input_buffer = malloc(command_buffer_len);
imv->input_buffer[0] = '\0';
imv->need_redraw = true;
}
break;
case SDLK_q:
imv->quit = true;
imv_command_exec(imv->commands, "quit", imv);
break;
case SDLK_LEFTBRACKET:
case SDLK_LEFT:
imv_command_exec(imv->commands, "select_rel -1", imv);
break;
case SDLK_RIGHTBRACKET:
case SDLK_RIGHT:
imv_command_exec(imv->commands, "select_rel 1", imv);
break;
case SDLK_EQUALS:
case SDLK_PLUS:
case SDLK_i:
case SDLK_UP:
imv_viewport_zoom(imv->view, imv->texture, IMV_ZOOM_KEYBOARD, 1);
break;
case SDLK_MINUS:
case SDLK_o:
case SDLK_DOWN:
imv_viewport_zoom(imv->view, imv->texture, IMV_ZOOM_KEYBOARD, -1);
break;
case SDLK_s:
if(!event->key.repeat) {
imv->scaling_mode++;
imv->scaling_mode %= SCALING_MODE_COUNT;
}
/* FALLTHROUGH */
case SDLK_r:
if(!event->key.repeat) {
imv->need_rescale = true;
imv->need_redraw = true;
}
break;
case SDLK_a:
if(!event->key.repeat) {
imv_viewport_scale_to_actual(imv->view, imv->texture);
}
break;
case SDLK_c:
if(!event->key.repeat) {
imv_viewport_center(imv->view, imv->texture);
}
break;
case SDLK_j:
imv_command_exec(imv->commands, "pan 0 -50", imv);
break;
case SDLK_k:
imv_command_exec(imv->commands, "pan 0 50", imv);
break;
case SDLK_h:
imv_command_exec(imv->commands, "pan 50 0", imv);
break;
case SDLK_l:
imv_command_exec(imv->commands, "pan -50 0", imv);
break;
case SDLK_x:
if(!event->key.repeat) {
imv_command_exec(imv->commands, "remove", imv);
}
break;
case SDLK_f:
if(!event->key.repeat) {
imv_command_exec(imv->commands, "fullscreen", imv);
}
break;
case SDLK_PERIOD:
imv_loader_load_next_frame(imv->loader);
break;
case SDLK_SPACE:
if(!event->key.repeat) {
imv_viewport_toggle_playing(imv->view);
}
break;
case SDLK_p:
if(!event->key.repeat) {
puts(imv_navigator_selection(imv->navigator));
}
break;
case SDLK_d:
if(!event->key.repeat) {
imv_command_exec(imv->commands, "overlay", imv);
}
break;
case SDLK_t:
if(event->key.keysym.mod & (KMOD_SHIFT|KMOD_CAPS)) {
if(imv->slideshow_image_duration >= 1000) {
imv->slideshow_image_duration -= 1000;
}
} else {
imv->slideshow_image_duration += 1000;
}
imv->need_redraw = true;
break;
}
break;
case SDL_MOUSEWHEEL:
imv_viewport_zoom(imv->view, imv->texture, IMV_ZOOM_MOUSE, event->wheel.y);
SDL_ShowCursor(SDL_ENABLE);
break;
case SDL_MOUSEMOTION:
if(event->motion.state & SDL_BUTTON_LMASK) {
imv_viewport_move(imv->view, event->motion.xrel, event->motion.yrel);
}
SDL_ShowCursor(SDL_ENABLE);
break;
case SDL_WINDOWEVENT:
imv_viewport_update(imv->view, imv->texture);
break;
}
}
static void render_window(struct imv *imv)
{
char title[1024];
int ww, wh;
SDL_GetWindowSize(imv->window, &ww, &wh);
/* update window title */
const char *current_path = imv_navigator_selection(imv->navigator);
int len = snprintf(title, sizeof(title), "imv - [%i/%i] [%ix%i] [%.2f%%] %s [%s]",
imv->navigator->cur_path + 1, imv->navigator->num_paths, imv->texture->width, imv->texture->height,
100.0 * imv->view->scale,
current_path, scaling_label[imv->scaling_mode]);
if(imv->slideshow_image_duration >= 1000) {
len += snprintf(title + len, sizeof(title) - len, "[%lu/%lus]",
imv->slideshow_time_elapsed / 1000 + 1, imv->slideshow_image_duration / 1000);
}
imv_viewport_set_title(imv->view, title);
/* first we draw the background */
if(imv->background_type == BACKGROUND_SOLID) {
/* solid background */
SDL_SetRenderDrawColor(imv->renderer,
imv->background_color.r,
imv->background_color.g,
imv->background_color.b,
255);
SDL_RenderClear(imv->renderer);
} else {
/* chequered background */
int img_w, img_h;
SDL_QueryTexture(imv->background_texture, NULL, NULL, &img_w, &img_h);
/* tile the texture so it fills the window */
for(int y = 0; y < wh; y += img_h) {
for(int x = 0; x < ww; x += img_w) {
SDL_Rect dst_rect = {x,y,img_w,img_h};
SDL_RenderCopy(imv->renderer, imv->background_texture, NULL, &dst_rect);
}
}
}
/* draw our actual texture */
imv_texture_draw(imv->texture, imv->view->x, imv->view->y, imv->view->scale);
/* if the overlay needs to be drawn, draw that too */
if(imv->overlay_enabled && imv->font) {
SDL_Color fg = {255,255,255,255};
SDL_Color bg = {0,0,0,160};
imv_printf(imv->renderer, imv->font, 0, 0, &fg, &bg, "%s",
title + strlen("imv - "));
}
/* draw command entry bar if needed */
if(imv->input_buffer && imv->font) {
SDL_Color fg = {255,255,255,255};
SDL_Color bg = {0,0,0,160};
imv_printf(imv->renderer,
imv->font,
0, wh - TTF_FontHeight(imv->font),
&fg, &bg,
":%s", imv->input_buffer);
}
/* redraw complete, unset the flag */
imv->need_redraw = false;
}
void command_quit(struct imv_list *args, void *data)
{
(void)args;
struct imv *imv = data;
imv->quit = 1;
}
void command_pan(struct imv_list *args, void *data)
{
struct imv *imv = data;
if(args->len != 3) {
return;
}
long int x = strtol(args->items[1], NULL, 10);
long int y = strtol(args->items[2], NULL, 10);
imv_viewport_move(imv->view, x, y);
}
void command_select_rel(struct imv_list *args, void *data)
{
struct imv *imv = data;
if(args->len != 2) {
return;
}
long int index = strtol(args->items[1], NULL, 10);
imv_navigator_select_rel(imv->navigator, index);
imv->slideshow_time_elapsed = 0;
}
void command_select_abs(struct imv_list *args, void *data)
{
(void)args;
(void)data;
}
void command_zoom(struct imv_list *args, void *data)
{
(void)args;
(void)data;
}
void command_remove(struct imv_list *args, void *data)
{
(void)args;
struct imv *imv = data;
char* path = strdup(imv_navigator_selection(imv->navigator));
imv_navigator_remove(imv->navigator, path);
free(path);
imv->slideshow_time_elapsed = 0;
}
void command_fullscreen(struct imv_list *args, void *data)
{
(void)args;
struct imv *imv = data;
imv_viewport_toggle_fullscreen(imv->view);
}
void command_overlay(struct imv_list *args, void *data)
{
(void)args;
struct imv *imv = data;
imv->overlay_enabled = !imv->overlay_enabled;
imv->need_redraw = true;
}
/* vim:set ts=2 sts=2 sw=2 et: */
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