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#include "fitz.h"
#include "muxps.h"
/*
* Parse a tiling brush (visual and image brushes at this time) common
* properties. Use the callback to draw the individual tiles.
*/
enum { TILE_NONE, TILE_TILE, TILE_FLIP_X, TILE_FLIP_Y, TILE_FLIP_X_Y };
struct closure
{
char *base_uri;
xps_resource *dict;
xps_item *root;
void *user;
void (*func)(xps_context*, fz_matrix, char*, xps_resource*, xps_item*, void*);
};
static void
xps_paint_tiling_brush_clipped(xps_context *ctx, fz_matrix ctm, fz_rect viewbox, struct closure *c)
{
ctx->path = fz_newpath();
fz_moveto(ctx->path, viewbox.x0, viewbox.y0);
fz_lineto(ctx->path, viewbox.x0, viewbox.y1);
fz_lineto(ctx->path, viewbox.x1, viewbox.y1);
fz_lineto(ctx->path, viewbox.x1, viewbox.y0);
fz_closepath(ctx->path);
xps_clip(ctx, ctm);
c->func(ctx, ctm, c->base_uri, c->dict, c->root, c->user);
ctx->dev->popclip(ctx->dev->user);
}
static void
xps_paint_tiling_brush(xps_context *ctx, fz_matrix ctm, fz_rect viewbox, int tile_mode, struct closure *c)
{
fz_matrix ttm;
xps_paint_tiling_brush_clipped(ctx, ctm, viewbox, c);
if (tile_mode == TILE_FLIP_X || tile_mode == TILE_FLIP_X_Y)
{
ttm = fz_concat(fz_translate(viewbox.x1 * 2, 0), ctm);
ttm = fz_concat(fz_scale(-1, 1), ttm);
xps_paint_tiling_brush_clipped(ctx, ttm, viewbox, c);
}
if (tile_mode == TILE_FLIP_Y || tile_mode == TILE_FLIP_X_Y)
{
ttm = fz_concat(fz_translate(0, viewbox.y1 * 2), ctm);
ttm = fz_concat(fz_scale(1, -1), ttm);
xps_paint_tiling_brush_clipped(ctx, ttm, viewbox, c);
}
if (tile_mode == TILE_FLIP_X_Y)
{
ttm = fz_concat(fz_translate(viewbox.x1 * 2, viewbox.y1 * 2), ctm);
ttm = fz_concat(fz_scale(-1, -1), ttm);
xps_paint_tiling_brush_clipped(ctx, ttm, viewbox, c);
}
}
void
xps_parse_tiling_brush(xps_context *ctx, fz_matrix ctm,
char *base_uri, xps_resource *dict, xps_item *root,
void (*func)(xps_context*, fz_matrix, char*, xps_resource*, xps_item*, void*), void *user)
{
xps_item *node;
struct closure c;
char *opacity_att;
char *transform_att;
char *viewbox_att;
char *viewport_att;
char *tile_mode_att;
char *viewbox_units_att;
char *viewport_units_att;
xps_item *transform_tag = NULL;
fz_matrix transform;
fz_rect viewbox;
fz_rect viewport;
float scalex, scaley;
int tile_mode;
opacity_att = xps_att(root, "Opacity");
transform_att = xps_att(root, "Transform");
viewbox_att = xps_att(root, "Viewbox");
viewport_att = xps_att(root, "Viewport");
tile_mode_att = xps_att(root, "TileMode");
viewbox_units_att = xps_att(root, "ViewboxUnits");
viewport_units_att = xps_att(root, "ViewportUnits");
c.base_uri = base_uri;
c.dict = dict;
c.root = root;
c.user = user;
c.func = func;
for (node = xps_down(root); node; node = xps_next(node))
{
if (!strcmp(xps_tag(node), "ImageBrush.Transform"))
transform_tag = xps_down(node);
if (!strcmp(xps_tag(node), "VisualBrush.Transform"))
transform_tag = xps_down(node);
}
xps_resolve_resource_reference(ctx, dict, &transform_att, &transform_tag, NULL);
transform = fz_identity;
if (transform_att)
xps_parse_render_transform(ctx, transform_att, &transform);
if (transform_tag)
xps_parse_matrix_transform(ctx, transform_tag, &transform);
viewbox = fz_unitrect;
if (viewbox_att)
xps_parse_rectangle(ctx, viewbox_att, &viewbox);
viewport = fz_unitrect;
if (viewport_att)
xps_parse_rectangle(ctx, viewport_att, &viewport);
/* some sanity checks on the viewport/viewbox size */
if (fabs(viewport.x1 - viewport.x0) < 0.01) return;
if (fabs(viewport.y1 - viewport.y0) < 0.01) return;
if (fabs(viewbox.x1 - viewbox.x0) < 0.01) return;
if (fabs(viewbox.y1 - viewbox.y0) < 0.01) return;
scalex = (viewport.x1 - viewport.x0) / (viewbox.x1 - viewbox.x0);
scaley = (viewport.y1 - viewport.y0) / (viewbox.y1 - viewbox.y0);
tile_mode = TILE_NONE;
if (tile_mode_att)
{
if (!strcmp(tile_mode_att, "None"))
tile_mode = TILE_NONE;
if (!strcmp(tile_mode_att, "Tile"))
tile_mode = TILE_TILE;
if (!strcmp(tile_mode_att, "FlipX"))
tile_mode = TILE_FLIP_X;
if (!strcmp(tile_mode_att, "FlipY"))
tile_mode = TILE_FLIP_Y;
if (!strcmp(tile_mode_att, "FlipXY"))
tile_mode = TILE_FLIP_X_Y;
}
xps_clip(ctx, ctm);
xps_begin_opacity(ctx, ctm, base_uri, dict, opacity_att, NULL);
ctm = fz_concat(transform, ctm);
ctm = fz_concat(fz_translate(viewport.x0, viewport.y0), ctm);
ctm = fz_concat(fz_scale(scalex, scaley), ctm);
ctm = fz_concat(fz_translate(-viewbox.x0, -viewbox.y0), ctm);
if (tile_mode != TILE_NONE)
{
float w = viewbox.x1 - viewbox.x0;
float h = viewbox.y1 - viewbox.y0;
fz_matrix ttm;
int x, y;
/* TODO: loop in visible area */
for (y = 0; y < 2; y++)
{
for (x = 0; x < 2; x++)
{
ttm = fz_concat(fz_translate(w*x, h*y), ctm);
xps_paint_tiling_brush(ctx, ttm, viewbox, tile_mode, &c);
}
}
}
else
{
xps_paint_tiling_brush(ctx, ctm, viewbox, tile_mode, &c);
}
xps_end_opacity(ctx, base_uri, dict, opacity_att, NULL);
ctx->dev->popclip(ctx->dev->user);
}
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