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Diffstat (limited to 'src/gwin/gimage.c')
| -rw-r--r-- | src/gwin/gimage.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/gwin/gimage.c b/src/gwin/gimage.c new file mode 100644 index 00000000..464bc595 --- /dev/null +++ b/src/gwin/gimage.c @@ -0,0 +1,173 @@ +/* + * 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) ((GImageWidget*)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(GImageWidget), // The object size + _destroy, // The destroy routine + _redraw, // The redraw routine + 0, // The after-clear routine +}; + +GHandle gwinImageCreate(GImageWidget *gobj, GWindowInit *pInit) { + if (!(gobj = (GImageWidget *)_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 +/** @} */ |