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#include "fitz.h"
#include "muxps.h"
static int
xps_decode_image(xps_context_t *ctx, xps_part_t *part, xps_image_t *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_t));
if (buf[0] == 0xff && buf[1] == 0xd8)
{
error = xps_decode_jpeg(ctx, buf, len, image);
if (error)
return fz_rethrow(error, "could not decode 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 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 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 image");
}
else
return fz_throw("unknown image file format");
return fz_okay;
}
static void
xps_paint_image_brush_imp(xps_context_t *ctx, fz_matrix ctm, xps_image_t *image)
{
fz_colorspace *colorspace;
unsigned int count;
byte *samples;
colorspace = image->colorspace;
samples = image->samples;
count = image->stride * image->height;
printf("xps_paint_image_brush_imp!\n");
}
static void
xps_paint_image_brush(xps_context_t *ctx, fz_matrix ctm, char *base_uri, xps_resource_t *dict, xps_item_t *root, void *vimage)
{
#if 0
xps_image_t *image = vimage;
int code;
if (ctx->opacity_only)
{
if (image->alpha)
{
code = xps_paint_image_brush_imp(ctx, image, 1);
if (code < 0)
return fz_rethrow(code, "cannot draw alpha channel image");
}
return 0;
}
if (image->alpha)
{
gs_transparency_mask_params_t params;
gs_transparency_group_params_t tgp;
fz_rect bbox;
xps_bounds_in_user_space(ctx, &bbox);
code = gs_gsave(ctx->pgs);
if (code < 0)
return fz_rethrow(code, "cannot gsave before transparency group");
gs_setcolorspace(ctx->pgs, ctx->gray);
gs_trans_mask_params_init(¶ms, TRANSPARENCY_MASK_Luminosity);
gs_begin_transparency_mask(ctx->pgs, ¶ms, &bbox, 0);
code = xps_paint_image_brush_imp(ctx, image, 1);
if (code < 0)
{
gs_end_transparency_mask(ctx->pgs, TRANSPARENCY_CHANNEL_Opacity);
gs_grestore(ctx->pgs);
return fz_rethrow(code, "cannot draw alpha channel image");
}
gs_end_transparency_mask(ctx->pgs, TRANSPARENCY_CHANNEL_Opacity);
gs_setcolorspace(ctx->pgs, image->colorspace);
gs_trans_group_params_init(&tgp);
gs_begin_transparency_group(ctx->pgs, &tgp, &bbox);
code = xps_paint_image_brush_imp(ctx, image, 0);
if (code < 0)
{
gs_end_transparency_group(ctx->pgs);
gs_grestore(ctx->pgs);
return fz_rethrow(code, "cannot draw color channel image");
}
gs_end_transparency_group(ctx->pgs);
code = gs_grestore(ctx->pgs);
if (code < 0)
return fz_rethrow(code, "cannot grestore after transparency group");
}
else
{
code = xps_paint_image_brush_imp(ctx, image, 0);
if (code < 0)
return fz_rethrow(code, "cannot draw image");
}
#endif
}
static int
xps_find_image_brush_source_part(xps_context_t *ctx, char *base_uri, xps_item_t *root,
xps_part_t **partp, char **profilep)
{
xps_part_t *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;
xps_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 = xps_strdup(ctx, profile_name);
return 0;
}
void
xps_parse_image_brush(xps_context_t *ctx, fz_matrix ctm, char *base_uri, xps_resource_t *dict, xps_item_t *root)
{
xps_part_t *part;
xps_image_t *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 = xps_alloc(ctx, sizeof(xps_image_t));
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)
xps_free(ctx, profilename);
xps_free_image(ctx, image);
xps_free_part(ctx, part);
}
void
xps_free_image(xps_context_t *ctx, xps_image_t *image)
{
// TODO: refcount image->colorspace
if (image->samples)
xps_free(ctx, image->samples);
if (image->profile)
xps_free(ctx, image->profile);
xps_free(ctx, image);
}
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