/* Method: ImageList#composite_layers Purpose: Equivalent to convert's -layers composite option Notes: see mogrify.c */ VALUE ImageList_composite_layers(int argc, VALUE *argv, VALUE self) { #if defined(HAVE_COMPOSITELAYERS) volatile VALUE source_images; Image *dest, *source, *new_images; RectangleInfo geometry; CompositeOperator operator = OverCompositeOp; ExceptionInfo exception; switch (argc) { case 2: VALUE_TO_ENUM(argv[1], operator, CompositeOperator); case 1: source_images = argv[0]; break; default: rb_raise(rb_eArgError, "wrong number of arguments (expected 1 or 2, got %d)", argc); break; } // Convert ImageLists to image sequences. dest = images_from_imagelist(self); new_images = clone_imagelist(dest); rm_split(dest); source = images_from_imagelist(source_images); SetGeometry(new_images,&geometry); (void) ParseAbsoluteGeometry(new_images->geometry, &geometry); geometry.width = source->page.width != 0 ? source->page.width : source->columns; geometry.height = source->page.height != 0 ? source->page.height : source->rows; GravityAdjustGeometry(new_images->page.width != 0 ? new_images->page.width : new_images->columns , new_images->page.height != 0 ? new_images->page.height : new_images->rows , new_images->gravity, &geometry); GetExceptionInfo(&exception); CompositeLayers(new_images, operator, source, geometry.x, geometry.y, &exception); rm_split(source); rm_check_exception(&exception, new_images, DestroyOnError); (void) DestroyExceptionInfo(&exception); return rm_imagelist_from_images(new_images); #else self = self; argc = argc; argv = argv; rm_not_implemented(); return (VALUE)0; #endif }
/** * Equivalent to convert's -layers composite option. * * Ruby usage: * - @verbatim ImageList#composite_layers(images) @endverbatim * - @verbatim ImageList#composite_layers(images,operator) @endverbatim * * Notes: * - Default operator is OverCompositeOp * * @param argc number of input arguments * @param argv array of input arguments * @param self this object * @return a new imagelist * @see mogrify.c in ImageMagick */ VALUE ImageList_composite_layers(int argc, VALUE *argv, VALUE self) { VALUE source_images; Image *dest, *source, *new_images; RectangleInfo geometry; CompositeOperator operator = OverCompositeOp; ExceptionInfo *exception; switch (argc) { case 2: VALUE_TO_ENUM(argv[1], operator, CompositeOperator); case 1: source_images = argv[0]; break; default: rb_raise(rb_eArgError, "wrong number of arguments (expected 1 or 2, got %d)", argc); break; } // Convert ImageLists to image sequences. dest = images_from_imagelist(self); new_images = clone_imagelist(dest); rm_split(dest); source = images_from_imagelist(source_images); SetGeometry(new_images,&geometry); (void) ParseAbsoluteGeometry(new_images->geometry, &geometry); geometry.width = source->page.width != 0 ? source->page.width : source->columns; geometry.height = source->page.height != 0 ? source->page.height : source->rows; GravityAdjustGeometry(new_images->page.width != 0 ? new_images->page.width : new_images->columns , new_images->page.height != 0 ? new_images->page.height : new_images->rows , new_images->gravity, &geometry); exception = AcquireExceptionInfo(); CompositeLayers(new_images, operator, source, geometry.x, geometry.y, exception); rm_split(source); rm_check_exception(exception, new_images, DestroyOnError); (void) DestroyExceptionInfo(exception); RB_GC_GUARD(source_images); return rm_imagelist_from_images(new_images); }
/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % P a r s e G r a v i t y G e o m e t r y % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ParseGravityGeometry() returns a region as defined by the geometry string % with respect to the image dimensions and its gravity. % % The format of the ParseGravityGeometry method is: % % MagickStatusType ParseGravityGeometry(Image *image,const char *geometry, % RectangeInfo *region_info,ExceptionInfo *exception) % % A description of each parameter follows: % % o geometry: The geometry (e.g. 100x100+10+10). % % o region_info: the region as defined by the geometry string with % respect to the image dimensions and its gravity. % % o exception: return any errors or warnings in this structure. % */ MagickExport MagickStatusType ParseGravityGeometry(const Image *image, const char *geometry,RectangleInfo *region_info,ExceptionInfo *exception) { MagickStatusType flags; size_t height, width; SetGeometry(image,region_info); if (image->page.width != 0) region_info->width=image->page.width; if (image->page.height != 0) region_info->height=image->page.height; flags=ParseAbsoluteGeometry(geometry,region_info); if (flags == NoValue) { (void) ThrowMagickException(exception,GetMagickModule(),OptionError, "InvalidGeometry","`%s'",geometry); return(flags); } if ((flags & PercentValue) != 0) { GeometryInfo geometry_info; MagickStatusType status; PointInfo scale; /* Geometry is a percentage of the image size. */ if (image->gravity != UndefinedGravity) flags|=XValue | YValue; status=ParseGeometry(geometry,&geometry_info); scale.x=geometry_info.rho; if ((status & RhoValue) == 0) scale.x=100.0; scale.y=geometry_info.sigma; if ((status & SigmaValue) == 0) scale.y=scale.x; region_info->width=(size_t) floor((scale.x*image->columns/100.0)+ 0.5); region_info->height=(size_t) floor((scale.y*image->rows/100.0)+ 0.5); } /* Adjust offset according to gravity setting. */ width=region_info->width; height=region_info->height; if (width == 0) region_info->width=image->page.width | image->columns; if (height == 0) region_info->height=image->page.height | image->rows; GravityAdjustGeometry(image->columns,image->rows,image->gravity,region_info); region_info->width=width; region_info->height=height; return(flags); }