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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
/**
* @file src/gwin/gwin_image.c
* @brief GWIN sub-system image code
*/
#include "gfx.h"
#if GFX_USE_GWIN && GWIN_NEED_IMAGE
#include "gwin_class.h"
#define widget(gh) ((GImageObject *)gh)
static void _destroy(GWindowObject *gh) {
if (gdispImageIsOpen(&widget(gh)->image))
gdispImageClose(&widget(gh)->image);
}
#if GWIN_NEED_IMAGE_ANIMATION
static void _timer(void *param) {
_gwinUpdate((GHandle)param);
}
#endif
static void _redraw(GHandle gh) {
coord_t x, y, w, h, dx, dy;
color_t bg;
#if GWIN_NEED_IMAGE_ANIMATION
delaytime_t delay;
#endif
// The default display area
dx = 0;
dy = 0;
x = gh->x;
y = gh->y;
w = gh->width;
h = gh->height;
bg = gwinGetDefaultBgColor();
// If the image isn't open just clear the area
if (!gdispImageIsOpen(&widget(gh)->image)) {
gdispGFillArea(gh->display, x, y, w, h, bg);
return;
}
// Center horizontally if the area is larger than the image
if (widget(gh)->image.width < w) {
w = widget(gh)->image.width;
dx = (gh->width-w)/2;
x += dx;
if (dx)
gdispGFillArea(gh->display, gh->x, y, dx, h, bg);
gdispGFillArea(gh->display, x+w, y, gh->width-dx-w, h, bg);
dx = 0;
}
// Center image horizontally if the area is smaller than the image
else if (widget(gh)->image.width > w) {
dx = (widget(gh)->image.width - w)/2;
}
// Center vertically if the area is larger than the image
if (widget(gh)->image.height < h) {
h = widget(gh)->image.height;
dy = (gh->height-h)/2;
y += dy;
if (dy)
gdispGFillArea(gh->display, x, gh->y, w, dy, bg);
gdispGFillArea(gh->display, x, y+h, w, gh->height-dy-h, bg);
dy = 0;
}
// Center image vertically if the area is smaller than the image
else if (widget(gh)->image.height > h) {
dy = (widget(gh)->image.height - h)/2;
}
// Reset the background color in case it has changed
gdispImageSetBgColor(&widget(gh)->image, bg);
// Display the image
gdispGImageDraw(gh->display, &widget(gh)->image, x, y, w, h, dx, dy);
#if GWIN_NEED_IMAGE_ANIMATION
// read the delay for the next frame
delay = gdispImageNext(&widget((GHandle)gh)->image);
// Wait for that delay if required
switch(delay) {
case TIME_INFINITE:
// Everything is done
break;
case TIME_IMMEDIATE:
// We can't allow a continuous loop here as it would lock the system up so we delay for the minimum period
delay = 1;
// Fall through
default:
// Start the timer to draw the next frame of the animation
gtimerStart(&widget((GHandle)gh)->timer, _timer, (void*)gh, FALSE, delay);
break;
}
#endif
}
static const gwinVMT imageVMT = {
"Image", // The class name
sizeof(GImageObject), // The object size
_destroy, // The destroy routine
_redraw, // The redraw routine
0, // The after-clear routine
};
GHandle gwinGImageCreate(GDisplay *g, GImageObject *gobj, GWindowInit *pInit) {
if (!(gobj = (GImageObject *)_gwindowCreate(g, &gobj->g, pInit, &imageVMT, 0)))
return 0;
// Ensure the gdispImageIsOpen() gives valid results
gdispImageInit(&gobj->image);
// Initialise the timer
#if GWIN_NEED_IMAGE_ANIMATION
gtimerInit(&gobj->timer);
#endif
gwinSetVisible((GHandle)gobj, pInit->show);
return (GHandle)gobj;
}
bool_t gwinImageOpenGFile(GHandle gh, GFILE *f) {
// is it a valid handle?
if (gh->vmt != (gwinVMT *)&imageVMT)
return FALSE;
if (gdispImageIsOpen(&widget(gh)->image))
gdispImageClose(&widget(gh)->image);
if ((gdispImageOpenGFile(&widget(gh)->image, f) & GDISP_IMAGE_ERR_UNRECOVERABLE))
return FALSE;
_gwinUpdate(gh);
return TRUE;
}
gdispImageError gwinImageCache(GHandle gh) {
// is it a valid handle?
if (gh->vmt != (gwinVMT *)&imageVMT)
return GDISP_IMAGE_ERR_BADFORMAT;
return gdispImageCache(&widget(gh)->image);
}
#endif // GFX_USE_GWIN && GWIN_NEED_IMAGE
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