diff options
Diffstat (limited to 'src/gwin/gwin_image.c')
-rw-r--r-- | src/gwin/gwin_image.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/gwin/gwin_image.c b/src/gwin/gwin_image.c new file mode 100644 index 00000000..370d7bdd --- /dev/null +++ b/src/gwin/gwin_image.c @@ -0,0 +1,162 @@ +/* + * 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 |