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faster zathura_document_get_cell_size

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We precompute the maximum width and maximum height when opening the
document. Then, when someone calls zathura_document_get_cell_size we use
page_calc_width_height to apply the rotation and scale the precomputed
values.
This commit is contained in:
Abdo Roig-Maranges 2013-10-20 17:00:07 +02:00
parent 7329209d84
commit f617ee61e5
2 changed files with 16 additions and 20 deletions
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34
document.c
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@ -50,6 +50,8 @@ struct zathura_document_s {
void* data; /**< Custom data */
zathura_adjust_mode_t adjust_mode; /**< Adjust mode (best-fit, width) */
int page_offset; /**< Page offset */
double cell_width; /**< width of a page cell in the document (not ransformed by scale and rotation) */
double cell_height; /**< height of a page cell in the document (not ransformed by scale and rotation) */
/**
* Document pages
@ -124,6 +126,8 @@ zathura_document_open(zathura_plugin_manager_t* plugin_manager, const char*
document->scale = 1.0;
document->plugin = plugin;
document->adjust_mode = ZATHURA_ADJUST_NONE;
document->cell_width = 0.0;
document->cell_height = 0.0;
/* open document */
zathura_plugin_functions_t* functions = zathura_plugin_get_functions(plugin);
@ -155,6 +159,15 @@ zathura_document_open(zathura_plugin_manager_t* plugin_manager, const char*
}
document->pages[page_id] = page;
/* cell_width and cell_height is the maximum of all the pages width and height */
double width = zathura_page_get_width(page);
if (document->cell_width < width)
document->cell_width = width;
double height = zathura_page_get_height(page);
if (document->cell_height < height)
document->cell_height = height;
}
return document;
@ -406,26 +419,9 @@ zathura_document_get_cell_size(zathura_document_t* document,
{
g_return_if_fail(document != NULL && height != NULL && width != NULL);
unsigned int number_of_pages =
zathura_document_get_number_of_pages(document);
*width = 0;
*height = 0;
page_calc_height_width(document, document->cell_height, document->cell_width,
height, width, true);
/* Get the size of each cell of the table/grid, assuming it is homogeneous
* (i.e. each cell has the same dimensions. */
for (unsigned int page_id = 0; page_id < number_of_pages; page_id++) {
zathura_page_t* page = zathura_document_get_page(document, page_id);
if (page == NULL)
continue;
unsigned int page_width = 0, page_height = 0;
page_calc_height_width(page, &page_height, &page_width, true);
if (*width < page_width)
*width = page_width;
if (*height < page_height)
*height = page_height;
}
}
zathura_error_t

2
document.h
View file

@ -178,7 +178,7 @@ void* zathura_document_get_data(zathura_document_t* document);
void zathura_document_set_data(zathura_document_t* document, void* data);
/**
* Computes the size of a cell in the document's layout table, assuming that
* Return the size of a cell in the document's layout table, assuming that
* the table is homogeneous (i.e. every cell has the same dimensions). It takes
* the current scale into account.
*