From 79c7e6178e9b577158408157ec23a477556ecf16 Mon Sep 17 00:00:00 2001
From: Bert <ber.t@gmx.com>
Date: Tue, 18 Jan 2011 20:11:28 +0100
Subject: [PATCH] Render image on window
---
app.c | 4 +++-
image.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++---
image.h | 4 ++--
sxiv.h | 5 ++++-
window.c | 7 +++++++
window.h | 1 +
6 files changed, 75 insertions(+), 7 deletions(-)
diff --git a/app.c b/app.c
index 2a3e0c2..3c1f88a 100644
--- a/app.c
+++ b/app.c
@@ -28,7 +28,7 @@ void app_init(app_t *app) {
app->fileidx = 0;
- app->img.zoom = 100;
+ app->img.zoom = 1.0;
app->img.scalemode = SCALE_MODE;
app->win.w = WIN_WIDTH;
@@ -52,4 +52,6 @@ void app_load_image(app_t *app) {
return;
img_load(&app->img, app->filenames[app->fileidx]);
+
+ img_render(&app->img, &app->win);
}
diff --git a/image.c b/image.c
index a430b81..235b2d4 100644
--- a/image.c
+++ b/image.c
@@ -25,7 +25,7 @@
void imlib_init(win_t *win) {
if (!win)
return;
-
+
imlib_context_set_display(win->env.dpy);
imlib_context_set_visual(win->env.vis);
imlib_context_set_colormap(win->env.cmap);
@@ -41,9 +41,64 @@ void img_load(img_t *img, char *filename) {
if (!(img->im = imlib_load_image(filename)))
DIE("could not open image: %s", filename);
-
+
imlib_context_set_image(img->im);
-
+
img->w = imlib_image_get_width();
img->h = imlib_image_get_height();
}
+
+void img_render(img_t *img, win_t *win) {
+ float zw, zh;
+ unsigned int sx, sy, sw, sh;
+ unsigned int dx, dy, dw, dh;
+
+ if (!img || !win)
+ return;
+
+ /* set zoom level to fit image into window */
+ if (img->scalemode != SCALE_ZOOM) {
+ zw = (float) win->w / (float) img->w;
+ zh = (float) win->h / (float) img->h;
+ img->zoom = MIN(zw, zh);
+
+ if (img->zoom * 100.0 < ZOOM_MIN)
+ img->zoom = ZOOM_MIN / 100.0;
+ else if (img->zoom * 100.0 > ZOOM_MAX)
+ img->zoom = ZOOM_MAX / 100.0;
+
+ if (img->scalemode == SCALE_DOWN && img->zoom > 1.0)
+ img->zoom = 1.0;
+ }
+
+ /* center image in window */
+ img->x = (win->w - img->w * img->zoom) / 2;
+ img->y = (win->h - img->h * img->zoom) / 2;
+
+ if (img->x < 0) {
+ sx = -img->x / img->zoom;
+ sw = (img->x + win->w) / img->zoom;
+ dx = 0;
+ dw = win->w;
+ } else {
+ sx = 0;
+ sw = img->w;
+ dx = img->x;
+ dw = img->w * img->zoom;
+ }
+ if (img->y < 0) {
+ sy = -img->y / img->zoom;
+ sh = (img->y + win->h) / img->zoom;
+ dy = 0;
+ dh = win->h;
+ } else {
+ sy = 0;
+ sh = img->h;
+ dy = img->y;
+ dh = img->h * img->zoom;
+ }
+
+ win_clear(win);
+
+ imlib_render_image_part_on_drawable_at_size(sx, sy, sw, sh, dx, dy, dw, dh);
+}
diff --git a/image.h b/image.h
index 78d4126..7eaf197 100644
--- a/image.h
+++ b/image.h
@@ -30,7 +30,7 @@ typedef enum scalemode_e {
} scalemode_t;
typedef struct img_s {
- int zoom;
+ float zoom;
scalemode_t scalemode;
int w;
int h;
@@ -43,6 +43,6 @@ typedef struct img_s {
void imlib_init(win_t*);
void img_load(img_t*, char*);
-void img_display(img_t*, win_t*);
+void img_render(img_t*, win_t*);
#endif /* IMAGE_H */
diff --git a/sxiv.h b/sxiv.h
index 1ebcf57..97252af 100644
--- a/sxiv.h
+++ b/sxiv.h
@@ -23,6 +23,9 @@
#define VERSION "git-20110117"
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#define MAX(a,b) ((a) > (b) ? (a) : (b))
+
#define WARN(...) \
do { \
fprintf(stderr, "sxiv: %s:%d: warning: ", __FILE__, __LINE__); \
@@ -30,7 +33,7 @@
fprintf(stderr, "\n"); \
} while (0)
-#define DIE(...) \
+#define DIE(...) \
do { \
fprintf(stderr, "sxiv: %s:%d: error: ", __FILE__, __LINE__); \
fprintf(stderr, __VA_ARGS__); \
diff --git a/window.c b/window.c
index f8afad6..223e4c6 100644
--- a/window.c
+++ b/window.c
@@ -106,3 +106,10 @@ int win_configure(win_t *win, XConfigureEvent *cev) {
win->bw = cev->border_width;
return changed;
}
+
+void win_clear(win_t *win) {
+ if (!win)
+ return;
+
+ XClearWindow(win->env.dpy, win->xwin);
+}
diff --git a/window.h b/window.h
index 3a080f0..3a1b230 100644
--- a/window.h
+++ b/window.h
@@ -47,5 +47,6 @@ void win_open(win_t*);
void win_close(win_t*);
int win_configure(win_t*, XConfigureEvent*);
+void win_clear(win_t*);
#endif /* WINDOW_H */