581 lines
13 KiB
C
581 lines
13 KiB
C
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#include "mupdf/fitz.h"
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#include <float.h>
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fz_display_list *
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fz_new_display_list_from_page(fz_context *ctx, fz_page *page)
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{
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fz_display_list *list;
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fz_device *dev = NULL;
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fz_var(dev);
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list = fz_new_display_list(ctx, fz_bound_page(ctx, page));
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fz_try(ctx)
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{
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dev = fz_new_list_device(ctx, list);
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fz_run_page(ctx, page, dev, fz_identity, NULL);
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fz_close_device(ctx, dev);
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}
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fz_always(ctx)
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{
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fz_drop_device(ctx, dev);
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}
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fz_catch(ctx)
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{
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fz_drop_display_list(ctx, list);
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fz_rethrow(ctx);
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}
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return list;
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}
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fz_display_list *
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fz_new_display_list_from_page_number(fz_context *ctx, fz_document *doc, int number)
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{
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fz_page *page;
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fz_display_list *list = NULL;
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page = fz_load_page(ctx, doc, number);
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fz_try(ctx)
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list = fz_new_display_list_from_page(ctx, page);
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fz_always(ctx)
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fz_drop_page(ctx, page);
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fz_catch(ctx)
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fz_rethrow(ctx);
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return list;
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}
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fz_display_list *
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fz_new_display_list_from_page_contents(fz_context *ctx, fz_page *page)
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{
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fz_display_list *list;
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fz_device *dev = NULL;
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fz_var(dev);
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list = fz_new_display_list(ctx, fz_bound_page(ctx, page));
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fz_try(ctx)
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{
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dev = fz_new_list_device(ctx, list);
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fz_run_page_contents(ctx, page, dev, fz_identity, NULL);
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fz_close_device(ctx, dev);
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}
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fz_always(ctx)
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{
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fz_drop_device(ctx, dev);
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}
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fz_catch(ctx)
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{
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fz_drop_display_list(ctx, list);
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fz_rethrow(ctx);
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}
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return list;
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}
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/*
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Render the page to a pixmap using the transform and colorspace.
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*/
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fz_pixmap *
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fz_new_pixmap_from_display_list(fz_context *ctx, fz_display_list *list, fz_matrix ctm, fz_colorspace *cs, int alpha)
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{
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return fz_new_pixmap_from_display_list_with_separations(ctx, list, ctm, cs, NULL, alpha);
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}
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fz_pixmap *
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fz_new_pixmap_from_display_list_with_separations(fz_context *ctx, fz_display_list *list, fz_matrix ctm, fz_colorspace *cs, fz_separations *seps, int alpha)
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{
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fz_rect rect;
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fz_irect bbox;
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fz_pixmap *pix;
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fz_device *dev = NULL;
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fz_var(dev);
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rect = fz_bound_display_list(ctx, list);
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rect = fz_transform_rect(rect, ctm);
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bbox = fz_round_rect(rect);
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pix = fz_new_pixmap_with_bbox(ctx, cs, bbox, seps, alpha);
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if (alpha)
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fz_clear_pixmap(ctx, pix);
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else
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fz_clear_pixmap_with_value(ctx, pix, 0xFF);
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fz_try(ctx)
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{
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dev = fz_new_draw_device(ctx, ctm, pix);
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fz_run_display_list(ctx, list, dev, fz_identity, fz_infinite_rect, NULL);
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fz_close_device(ctx, dev);
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}
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fz_always(ctx)
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{
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fz_drop_device(ctx, dev);
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}
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fz_catch(ctx)
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{
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fz_drop_pixmap(ctx, pix);
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fz_rethrow(ctx);
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}
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return pix;
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}
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/*
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Render the page contents without annotations.
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*/
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fz_pixmap *
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fz_new_pixmap_from_page_contents(fz_context *ctx, fz_page *page, fz_matrix ctm, fz_colorspace *cs, int alpha)
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{
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return fz_new_pixmap_from_page_contents_with_separations(ctx, page, ctm, cs, NULL, alpha);
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}
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fz_pixmap *
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fz_new_pixmap_from_page_contents_with_separations(fz_context *ctx, fz_page *page, fz_matrix ctm, fz_colorspace *cs, fz_separations *seps, int alpha)
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{
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fz_rect rect;
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fz_irect bbox;
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fz_pixmap *pix;
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fz_device *dev = NULL;
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fz_var(dev);
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rect = fz_bound_page(ctx, page);
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rect = fz_transform_rect(rect, ctm);
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bbox = fz_round_rect(rect);
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pix = fz_new_pixmap_with_bbox(ctx, cs, bbox, seps, alpha);
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if (alpha)
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fz_clear_pixmap(ctx, pix);
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else
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fz_clear_pixmap_with_value(ctx, pix, 0xFF);
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fz_try(ctx)
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{
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dev = fz_new_draw_device(ctx, ctm, pix);
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fz_run_page_contents(ctx, page, dev, fz_identity, NULL);
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fz_close_device(ctx, dev);
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}
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fz_always(ctx)
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{
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fz_drop_device(ctx, dev);
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}
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fz_catch(ctx)
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{
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fz_drop_pixmap(ctx, pix);
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fz_rethrow(ctx);
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}
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return pix;
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}
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fz_pixmap *
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fz_new_pixmap_from_page(fz_context *ctx, fz_page *page, fz_matrix ctm, fz_colorspace *cs, int alpha)
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{
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return fz_new_pixmap_from_page_with_separations(ctx, page, ctm, cs, NULL, alpha);
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}
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fz_pixmap *
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fz_new_pixmap_from_page_with_separations(fz_context *ctx, fz_page *page, fz_matrix ctm, fz_colorspace *cs, fz_separations *seps, int alpha)
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{
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fz_rect rect;
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fz_irect bbox;
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fz_pixmap *pix;
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fz_device *dev = NULL;
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fz_var(dev);
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rect = fz_bound_page(ctx, page);
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rect = fz_transform_rect(rect, ctm);
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bbox = fz_round_rect(rect);
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pix = fz_new_pixmap_with_bbox(ctx, cs, bbox, seps, alpha);
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fz_try(ctx)
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{
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if (alpha)
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fz_clear_pixmap(ctx, pix);
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else
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fz_clear_pixmap_with_value(ctx, pix, 0xFF);
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dev = fz_new_draw_device(ctx, ctm, pix);
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fz_run_page(ctx, page, dev, fz_identity, NULL);
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fz_close_device(ctx, dev);
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}
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fz_always(ctx)
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{
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fz_drop_device(ctx, dev);
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}
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fz_catch(ctx)
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{
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fz_drop_pixmap(ctx, pix);
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fz_rethrow(ctx);
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}
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return pix;
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}
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fz_pixmap *
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fz_new_pixmap_from_page_number(fz_context *ctx, fz_document *doc, int number, fz_matrix ctm, fz_colorspace *cs, int alpha)
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{
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return fz_new_pixmap_from_page_number_with_separations(ctx, doc, number, ctm, cs, NULL, alpha);
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}
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fz_pixmap *
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fz_new_pixmap_from_page_number_with_separations(fz_context *ctx, fz_document *doc, int number, fz_matrix ctm, fz_colorspace *cs, fz_separations *seps, int alpha)
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{
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fz_page *page;
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fz_pixmap *pix = NULL;
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page = fz_load_page(ctx, doc, number);
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fz_try(ctx)
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pix = fz_new_pixmap_from_page_with_separations(ctx, page, ctm, cs, seps, alpha);
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fz_always(ctx)
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fz_drop_page(ctx, page);
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fz_catch(ctx)
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fz_rethrow(ctx);
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return pix;
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}
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fz_stext_page *
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fz_new_stext_page_from_display_list(fz_context *ctx, fz_display_list *list, const fz_stext_options *options)
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{
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fz_stext_page *text;
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fz_device *dev = NULL;
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fz_var(dev);
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if (list == NULL)
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return NULL;
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text = fz_new_stext_page(ctx, fz_bound_display_list(ctx, list));
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fz_try(ctx)
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{
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dev = fz_new_stext_device(ctx, text, options);
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fz_run_display_list(ctx, list, dev, fz_identity, fz_infinite_rect, NULL);
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fz_close_device(ctx, dev);
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}
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fz_always(ctx)
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{
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fz_drop_device(ctx, dev);
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}
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fz_catch(ctx)
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{
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fz_drop_stext_page(ctx, text);
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fz_rethrow(ctx);
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}
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return text;
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}
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fz_stext_page *
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fz_new_stext_page_from_page(fz_context *ctx, fz_page *page, const fz_stext_options *options)
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{
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fz_stext_page *text;
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fz_device *dev = NULL;
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fz_var(dev);
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if (page == NULL)
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return NULL;
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text = fz_new_stext_page(ctx, fz_bound_page(ctx, page));
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fz_try(ctx)
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{
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dev = fz_new_stext_device(ctx, text, options);
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fz_run_page_contents(ctx, page, dev, fz_identity, NULL);
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fz_close_device(ctx, dev);
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}
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fz_always(ctx)
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{
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fz_drop_device(ctx, dev);
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}
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fz_catch(ctx)
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{
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fz_drop_stext_page(ctx, text);
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fz_rethrow(ctx);
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}
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return text;
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}
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fz_stext_page *
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fz_new_stext_page_from_page_number(fz_context *ctx, fz_document *doc, int number, const fz_stext_options *options)
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{
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fz_page *page;
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fz_stext_page *text = NULL;
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page = fz_load_page(ctx, doc, number);
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fz_try(ctx)
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text = fz_new_stext_page_from_page(ctx, page, options);
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fz_always(ctx)
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fz_drop_page(ctx, page);
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fz_catch(ctx)
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fz_rethrow(ctx);
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return text;
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}
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int
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fz_search_display_list(fz_context *ctx, fz_display_list *list, const char *needle, fz_quad *hit_bbox, int hit_max)
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{
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fz_stext_page *text;
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int count = 0;
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text = fz_new_stext_page_from_display_list(ctx, list, NULL);
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fz_try(ctx)
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count = fz_search_stext_page(ctx, text, needle, hit_bbox, hit_max);
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fz_always(ctx)
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fz_drop_stext_page(ctx, text);
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fz_catch(ctx)
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fz_rethrow(ctx);
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return count;
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}
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/*
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Search for the 'needle' text on the page.
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Record the hits in the hit_bbox array and return the number of hits.
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Will stop looking once it has filled hit_max rectangles.
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*/
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int
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fz_search_page(fz_context *ctx, fz_page *page, const char *needle, fz_quad *hit_bbox, int hit_max)
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{
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fz_stext_page *text;
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int count = 0;
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text = fz_new_stext_page_from_page(ctx, page, NULL);
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fz_try(ctx)
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count = fz_search_stext_page(ctx, text, needle, hit_bbox, hit_max);
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fz_always(ctx)
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fz_drop_stext_page(ctx, text);
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fz_catch(ctx)
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fz_rethrow(ctx);
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return count;
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}
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int
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fz_search_page_number(fz_context *ctx, fz_document *doc, int number, const char *needle, fz_quad *hit_bbox, int hit_max)
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||
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{
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fz_page *page;
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int count = 0;
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page = fz_load_page(ctx, doc, number);
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fz_try(ctx)
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count = fz_search_page(ctx, page, needle, hit_bbox, hit_max);
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fz_always(ctx)
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|
|
fz_drop_page(ctx, page);
|
||
|
|
fz_catch(ctx)
|
||
|
|
fz_rethrow(ctx);
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
fz_search_chapter_page_number(fz_context *ctx, fz_document *doc, int chapter, int number, const char *needle, fz_quad *hit_bbox, int hit_max)
|
||
|
|
{
|
||
|
|
fz_page *page;
|
||
|
|
int count = 0;
|
||
|
|
|
||
|
|
page = fz_load_chapter_page(ctx, doc, chapter, number);
|
||
|
|
fz_try(ctx)
|
||
|
|
count = fz_search_page(ctx, page, needle, hit_bbox, hit_max);
|
||
|
|
fz_always(ctx)
|
||
|
|
fz_drop_page(ctx, page);
|
||
|
|
fz_catch(ctx)
|
||
|
|
fz_rethrow(ctx);
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Convert structured text into plain text.
|
||
|
|
*/
|
||
|
|
fz_buffer *
|
||
|
|
fz_new_buffer_from_stext_page(fz_context *ctx, fz_stext_page *page)
|
||
|
|
{
|
||
|
|
fz_stext_block *block;
|
||
|
|
fz_stext_line *line;
|
||
|
|
fz_stext_char *ch;
|
||
|
|
fz_buffer *buf;
|
||
|
|
|
||
|
|
buf = fz_new_buffer(ctx, 256);
|
||
|
|
fz_try(ctx)
|
||
|
|
{
|
||
|
|
for (block = page->first_block; block; block = block->next)
|
||
|
|
{
|
||
|
|
if (block->type == FZ_STEXT_BLOCK_TEXT)
|
||
|
|
{
|
||
|
|
for (line = block->u.t.first_line; line; line = line->next)
|
||
|
|
{
|
||
|
|
for (ch = line->first_char; ch; ch = ch->next)
|
||
|
|
fz_append_rune(ctx, buf, ch->c);
|
||
|
|
fz_append_byte(ctx, buf, '\n');
|
||
|
|
}
|
||
|
|
fz_append_byte(ctx, buf, '\n');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
fz_catch(ctx)
|
||
|
|
{
|
||
|
|
fz_drop_buffer(ctx, buf);
|
||
|
|
fz_rethrow(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
return buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
fz_buffer *
|
||
|
|
fz_new_buffer_from_display_list(fz_context *ctx, fz_display_list *list, const fz_stext_options *options)
|
||
|
|
{
|
||
|
|
fz_stext_page *text;
|
||
|
|
fz_buffer *buf = NULL;
|
||
|
|
|
||
|
|
text = fz_new_stext_page_from_display_list(ctx, list, options);
|
||
|
|
fz_try(ctx)
|
||
|
|
buf = fz_new_buffer_from_stext_page(ctx, text);
|
||
|
|
fz_always(ctx)
|
||
|
|
fz_drop_stext_page(ctx, text);
|
||
|
|
fz_catch(ctx)
|
||
|
|
fz_rethrow(ctx);
|
||
|
|
return buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
fz_buffer *
|
||
|
|
fz_new_buffer_from_page(fz_context *ctx, fz_page *page, const fz_stext_options *options)
|
||
|
|
{
|
||
|
|
fz_stext_page *text;
|
||
|
|
fz_buffer *buf = NULL;
|
||
|
|
|
||
|
|
text = fz_new_stext_page_from_page(ctx, page, options);
|
||
|
|
fz_try(ctx)
|
||
|
|
buf = fz_new_buffer_from_stext_page(ctx, text);
|
||
|
|
fz_always(ctx)
|
||
|
|
fz_drop_stext_page(ctx, text);
|
||
|
|
fz_catch(ctx)
|
||
|
|
fz_rethrow(ctx);
|
||
|
|
return buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
fz_buffer *
|
||
|
|
fz_new_buffer_from_page_number(fz_context *ctx, fz_document *doc, int number, const fz_stext_options *options)
|
||
|
|
{
|
||
|
|
fz_page *page;
|
||
|
|
fz_buffer *buf = NULL;
|
||
|
|
|
||
|
|
page = fz_load_page(ctx, doc, number);
|
||
|
|
fz_try(ctx)
|
||
|
|
buf = fz_new_buffer_from_page(ctx, page, options);
|
||
|
|
fz_always(ctx)
|
||
|
|
fz_drop_page(ctx, page);
|
||
|
|
fz_catch(ctx)
|
||
|
|
fz_rethrow(ctx);
|
||
|
|
return buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Write image as a data URI (for HTML and SVG output).
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
fz_write_image_as_data_uri(fz_context *ctx, fz_output *out, fz_image *image)
|
||
|
|
{
|
||
|
|
fz_compressed_buffer *cbuf;
|
||
|
|
fz_buffer *buf;
|
||
|
|
|
||
|
|
cbuf = fz_compressed_image_buffer(ctx, image);
|
||
|
|
|
||
|
|
if (cbuf && cbuf->params.type == FZ_IMAGE_JPEG)
|
||
|
|
{
|
||
|
|
int type = fz_colorspace_type(ctx, image->colorspace);
|
||
|
|
if (type == FZ_COLORSPACE_GRAY || type == FZ_COLORSPACE_RGB)
|
||
|
|
{
|
||
|
|
fz_write_string(ctx, out, "data:image/jpeg;base64,");
|
||
|
|
fz_write_base64_buffer(ctx, out, cbuf->buffer, 1);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (cbuf && cbuf->params.type == FZ_IMAGE_PNG)
|
||
|
|
{
|
||
|
|
fz_write_string(ctx, out, "data:image/png;base64,");
|
||
|
|
fz_write_base64_buffer(ctx, out, cbuf->buffer, 1);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
buf = fz_new_buffer_from_image_as_png(ctx, image, fz_default_color_params);
|
||
|
|
fz_try(ctx)
|
||
|
|
{
|
||
|
|
fz_write_string(ctx, out, "data:image/png;base64,");
|
||
|
|
fz_write_base64_buffer(ctx, out, buf, 1);
|
||
|
|
}
|
||
|
|
fz_always(ctx)
|
||
|
|
fz_drop_buffer(ctx, buf);
|
||
|
|
fz_catch(ctx)
|
||
|
|
fz_rethrow(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
fz_write_pixmap_as_data_uri(fz_context *ctx, fz_output *out, fz_pixmap *pixmap)
|
||
|
|
{
|
||
|
|
fz_buffer *buf = fz_new_buffer_from_pixmap_as_png(ctx, pixmap, fz_default_color_params);
|
||
|
|
fz_try(ctx)
|
||
|
|
{
|
||
|
|
fz_write_string(ctx, out, "data:image/png;base64,");
|
||
|
|
fz_write_base64_buffer(ctx, out, buf, 1);
|
||
|
|
}
|
||
|
|
fz_always(ctx)
|
||
|
|
fz_drop_buffer(ctx, buf);
|
||
|
|
fz_catch(ctx)
|
||
|
|
fz_rethrow(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Use text extraction to convert the input document into XHTML, then
|
||
|
|
* open the result as a new document that can be reflowed.
|
||
|
|
*/
|
||
|
|
fz_document *
|
||
|
|
fz_new_xhtml_document_from_document(fz_context *ctx, fz_document *old_doc)
|
||
|
|
{
|
||
|
|
fz_stext_options opts = { FZ_STEXT_PRESERVE_IMAGES };
|
||
|
|
fz_document *new_doc;
|
||
|
|
fz_buffer *buf = NULL;
|
||
|
|
fz_output *out = NULL;
|
||
|
|
fz_stream *stm = NULL;
|
||
|
|
fz_stext_page *text = NULL;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
fz_var(buf);
|
||
|
|
fz_var(out);
|
||
|
|
fz_var(stm);
|
||
|
|
fz_var(text);
|
||
|
|
|
||
|
|
fz_try(ctx)
|
||
|
|
{
|
||
|
|
buf = fz_new_buffer(ctx, 8192);
|
||
|
|
out = fz_new_output_with_buffer(ctx, buf);
|
||
|
|
fz_print_stext_header_as_xhtml(ctx, out);
|
||
|
|
|
||
|
|
for (i = 0; i < fz_count_pages(ctx, old_doc); ++i)
|
||
|
|
{
|
||
|
|
text = fz_new_stext_page_from_page_number(ctx, old_doc, i, &opts);
|
||
|
|
fz_print_stext_page_as_xhtml(ctx, out, text, i+1);
|
||
|
|
fz_drop_stext_page(ctx, text);
|
||
|
|
text = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
fz_print_stext_trailer_as_xhtml(ctx, out);
|
||
|
|
fz_close_output(ctx, out);
|
||
|
|
fz_terminate_buffer(ctx, buf);
|
||
|
|
|
||
|
|
stm = fz_open_buffer(ctx, buf);
|
||
|
|
new_doc = fz_open_document_with_stream(ctx, "application/html+xml", stm);
|
||
|
|
}
|
||
|
|
fz_always(ctx)
|
||
|
|
{
|
||
|
|
fz_drop_stream(ctx, stm);
|
||
|
|
fz_drop_buffer(ctx, buf);
|
||
|
|
fz_drop_output(ctx, out);
|
||
|
|
fz_drop_stext_page(ctx, text);
|
||
|
|
}
|
||
|
|
fz_catch(ctx)
|
||
|
|
fz_rethrow(ctx);
|
||
|
|
|
||
|
|
return new_doc;
|
||
|
|
}
|