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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://chibios-gfx.com/license.html
*/
/**
* @file src/gwin/image.c
* @brief GWIN sub-system image code.
*/
#include "gfx.h"
#if GFX_USE_GWIN && GWIN_NEED_IMAGE
#include "gwin/class_gwin.h"
#define widget(gh) ((GImageObject *)gh)
static void _destroy(GWindowObject *gh) {
if (gdispImageIsOpen(&widget(gh)->image))
gdispImageClose(&widget(gh)->image);
}
static void _redraw(GHandle gh) {
coord_t x, y, w, h, dx, dy;
// The default display area
x = gh->x;
y = gh->y;
w = gh->width;
h = gh->height;
// If the image isn't open just clear the area
if (!gdispImageIsOpen(&widget(gh)->image)) {
gdispFillArea(x, y, w, h, gh->bgcolor);
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)
gdispFillArea(gh->x, y, dx, h, gh->bgcolor);
gdispFillArea(x+w, y, gh->width-dx-w, h, gh->bgcolor);
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)
gdispFillArea(x, gh->y, w, dy, gh->bgcolor);
gdispFillArea(x, y+h, w, gh->height-dy-h, gh->bgcolor);
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, gh->bgcolor);
// Display the image
gdispImageDraw(&widget(gh)->image, x, y, w, h, dx, dy);
}
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 gwinImageCreate(GImageObject *gobj, GWindowInit *pInit) {
if (!(gobj = (GImageObject *)_gwindowCreate(&gobj->g, pInit, &imageVMT, 0)))
return 0;
// Ensure the gdispImageIsOpen() gives valid results
gobj->image.type = 0;
gwinSetVisible((GHandle)gobj, pInit->show);
return (GHandle)gobj;
}
bool_t gwinImageOpenMemory(GHandle gh, const void* memory) {
if (gdispImageIsOpen(&widget(gh)->image))
gdispImageClose(&widget(gh)->image);
if (!gdispImageSetMemoryReader(&widget(gh)->image, memory))
return FALSE;
if (gdispImageOpen(&widget(gh)->image) != GDISP_IMAGE_ERR_OK)
return FALSE;
if ((gh->flags & GWIN_FLG_VISIBLE)) {
// Setting the clip here shouldn't be necessary if the redraw doesn't overdraw
// but we put it in for safety anyway
#if GDISP_NEED_CLIP
gdispSetClip(gh->x, gh->y, gh->width, gh->height);
#endif
_redraw(gh);
}
return TRUE;
}
#if defined(WIN32) || GFX_USE_OS_WIN32 || GFX_USE_OS_POSIX || defined(__DOXYGEN__)
bool_t gwinImageOpenFile(GHandle gh, const char* filename) {
if (gdispImageIsOpen(&widget(gh)->image))
gdispImageClose(&widget(gh)->image);
if (!gdispImageSetFileReader(&widget(gh)->image, filename))
return FALSE;
if (gdispImageOpen(&widget(gh)->image) != GDISP_IMAGE_ERR_OK)
return FALSE;
if ((gh->flags & GWIN_FLG_VISIBLE)) {
// Setting the clip here shouldn't be necessary if the redraw doesn't overdraw
// but we put it in for safety anyway
#if GDISP_NEED_CLIP
gdispSetClip(gh->x, gh->y, gh->width, gh->height);
#endif
_redraw(gh);
}
return TRUE;
}
#endif
#if GFX_USE_OS_CHIBIOS || defined(__DOXYGEN__)
bool_t gwinImageOpenStream(GHandle gh, void *streamPtr) {
if (gdispImageIsOpen(&widget(gh)->image))
gdispImageClose(&widget(gh)->image);
if (!gdispImageSetBaseFileStreamReader(&widget(gh)->image, streamPtr))
return FALSE;
if (gdispImageOpen(&widget(gh)->image) != GDISP_IMAGE_ERR_OK)
return FALSE;
if ((gh->flags & GWIN_FLG_VISIBLE)) {
// Setting the clip here shouldn't be necessary if the redraw doesn't overdraw
// but we put it in for safety anyway
#if GDISP_NEED_CLIP
gdispSetClip(gh->x, gh->y, gh->width, gh->height);
#endif
_redraw(gh);
}
return TRUE;
}
#endif
gdispImageError gwinImageCache(GHandle gh) {
return gdispImageCache(&widget(gh)->image);
}
#endif // GFX_USE_GWIN && GWIN_NEED_IMAGE
/** @} */
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