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#include "fitz.h"
#include "muxps.h"
static int
xps_decode_image(xps_context *ctx, xps_part *part, xps_image *image)
{
byte *buf = part->data;
int len = part->size;
int error;
if (len < 8)
return fz_throw("unknown image file format");
memset(image, 0, sizeof(xps_image));
if (buf[0] == 0xff && buf[1] == 0xd8)
{
error = xps_decode_jpeg(ctx, buf, len, image);
if (error)
return fz_rethrow(error, "could not decode jpeg image");
}
else if (memcmp(buf, "\211PNG\r\n\032\n", 8) == 0)
{
error = xps_decode_png(ctx, buf, len, image);
if (error)
return fz_rethrow(error, "could not decode png image");
}
else if (memcmp(buf, "II", 2) == 0 && buf[2] == 0xBC)
{
error = xps_decode_jpegxr(ctx, buf, len, image);
if (error)
return fz_rethrow(error, "could not decode JPEG-XR image");
}
else if (memcmp(buf, "MM", 2) == 0 || memcmp(buf, "II", 2) == 0)
{
error = xps_decode_tiff(ctx, buf, len, image);
if (error)
return fz_rethrow(error, "could not decode TIFF image");
}
else
return fz_throw("unknown image file format");
image->pixmap = fz_newpixmap(image->colorspace, 0, 0, image->width, image->height);
fz_unpacktile(image->pixmap, image->samples, image->comps, image->bits, image->stride, 1);
fz_free(image->samples);
image->samples = NULL;
return fz_okay;
}
static void
xps_paint_image_brush(xps_context *ctx, fz_matrix ctm, char *base_uri, xps_resource *dict, xps_item *root, void *vimage)
{
xps_image *image = vimage;
float xs = image->width * 96.0 / image->xres;
float ys = image->height * 96.0 / image->yres;
fz_matrix im = fz_scale(xs, -ys);
im.f = ys;
ctm = fz_concat(im, ctm);
ctx->dev->fillimage(ctx->dev->user, image->pixmap, ctm, 1.0);
}
static int
xps_find_image_brush_source_part(xps_context *ctx, char *base_uri, xps_item *root,
xps_part **partp, char **profilep)
{
xps_part *part;
char *image_source_att;
char buf[1024];
char partname[1024];
char *image_name;
char *profile_name;
char *p;
image_source_att = xps_att(root, "ImageSource");
if (!image_source_att)
return fz_throw("missing ImageSource attribute");
/* "{ColorConvertedBitmap /Resources/Image.tiff /Resources/Profile.icc}" */
if (strstr(image_source_att, "{ColorConvertedBitmap") == image_source_att)
{
image_name = NULL;
profile_name = NULL;
fz_strlcpy(buf, image_source_att, sizeof buf);
p = strchr(buf, ' ');
if (p)
{
image_name = p + 1;
p = strchr(p + 1, ' ');
if (p)
{
*p = 0;
profile_name = p + 1;
p = strchr(p + 1, '}');
if (p)
*p = 0;
}
}
}
else
{
image_name = image_source_att;
profile_name = NULL;
}
if (!image_name)
return fz_throw("cannot parse image resource name '%s'", image_source_att);
xps_absolute_path(partname, base_uri, image_name, sizeof partname);
part = xps_read_part(ctx, partname);
if (!part)
return fz_throw("cannot find image resource part '%s'", partname);
*partp = part;
if (profile_name)
*profilep = fz_strdup(profile_name);
return 0;
}
void
xps_parse_image_brush(xps_context *ctx, fz_matrix ctm, char *base_uri, xps_resource *dict, xps_item *root)
{
xps_part *part;
xps_image *image;
fz_colorspace *colorspace;
char *profilename;
int code;
profilename = NULL;
code = xps_find_image_brush_source_part(ctx, base_uri, root, &part, &profilename);
if (code < 0) {
fz_catch(code, "cannot find image source");
return;
}
image = fz_malloc(sizeof(xps_image));
code = xps_decode_image(ctx, part, image);
if (code < 0) {
fz_free(image);
fz_catch(-1, "cannot decode image resource");
return;
}
/* Override any embedded colorspace profiles if the external one matches. */
if (profilename)
{
colorspace = xps_read_icc_colorspace(ctx, base_uri, profilename);
if (colorspace && colorspace->n == image->colorspace->n)
{
// TODO: refcount image->colorspace
image->colorspace = colorspace;
}
}
xps_parse_tiling_brush(ctx, ctm, base_uri, dict, root, xps_paint_image_brush, image);
if (profilename)
fz_free(profilename);
xps_free_image(ctx, image);
xps_free_part(ctx, part);
}
void
xps_free_image(xps_context *ctx, xps_image *image)
{
// TODO: refcount image->colorspace
if (image->pixmap)
fz_droppixmap(image->pixmap);
if (image->samples)
fz_free(image->samples);
if (image->profile)
fz_free(image->profile);
fz_free(image);
}
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