fz_pixmap *
fz_load_jxr(fz_context *ctx, unsigned char *data, size_t size)
{
struct info info = { 0 };
fz_pixmap *image = NULL;
fz_var(image);
jxr_read_image(ctx, data, size, &info, 0);
image = fz_new_pixmap(ctx, info.cspace, info.width, info.height, NULL, 1);
image->xres = info.xres;
image->yres = info.yres;
fz_try(ctx)
{
fz_unpack_tile(ctx, image, info.samples, fz_colorspace_n(ctx, info.cspace) + 1, 8, info.stride, 0);
if (info.has_alpha && !info.has_premul)
fz_premultiply_pixmap(ctx, image);
}
fz_always(ctx)
{
fz_free(ctx, info.samples);
fz_drop_colorspace(ctx, info.cspace);
}
fz_catch(ctx)
{
fz_drop_pixmap(ctx, image);
fz_rethrow(ctx);
}
return image;
}
static void
jxr_decode_block_alpha(jxr_image_t image, int mx, int my, int *data)
{
struct info *info = jxr_get_user_data(image);
fz_context *ctx = info->ctx;
unsigned char *p;
int x, y, n;
mx *= 16;
my *= 16;
n = fz_colorspace_n(ctx, info->cspace);
for (y = 0; y < 16; y++)
{
if ((my + y) >= info->height)
return;
p = info->samples + (my + y) * info->stride + mx * (n + 1);
for (x = 0; x < 16; x++)
{
if ((mx + x) < info->width)
{
jxr_unpack_alpha_sample(ctx, info, image, data, p + n);
p += n + 1;
}
data++;
}
}
}
static void
jxr_decode_block(jxr_image_t image, int mx, int my, int *data)
{
struct info *info = jxr_get_user_data(image);
fz_context *ctx = info->ctx;
unsigned char *p;
int x, y, n1;
mx *= 16;
my *= 16;
n1 = fz_colorspace_n(ctx, info->cspace) + 1;
for (y = 0; y < 16; y++)
{
if ((my + y) >= info->height)
return;
p = info->samples + (my + y) * info->stride + mx * n1;
for (x = 0; x < 16; x++)
{
if ((mx + x) < info->width)
{
jxr_unpack_sample(ctx, info, image, data, p);
p += n1;
}
data += jxr_get_IMAGE_CHANNELS(image) + jxr_get_ALPHACHANNEL_FLAG(image);
data += (info->format == JXRC_FMT_32bppRGBE ? 1 : 0);
}
}
}
static inline void
jxr_unpack_sample(fz_context *ctx, struct info *info, jxr_image_t image, int *sp, unsigned char *dp)
{
int k, bpc, comps, alpha;
float v;
if (info->format == JXRC_FMT_32bppRGBE)
{
dp[0] = sRGB_from_scRGB(ldexpf(sp[0], sp[3] - 128 - 8)) * 255 + 0.5f;
dp[1] = sRGB_from_scRGB(ldexpf(sp[1], sp[3] - 128 - 8)) * 255 + 0.5f;
dp[2] = sRGB_from_scRGB(ldexpf(sp[2], sp[3] - 128 - 8)) * 255 + 0.5f;
return;
}
if (info->format == JXRC_FMT_16bppBGR565)
{
dp[0] = sp[0] << 3;
dp[1] = sp[1] << 2;
dp[2] = sp[2] << 3;
return;
}
comps = fz_mini(fz_colorspace_n(ctx, info->cspace), jxr_get_IMAGE_CHANNELS(image));
alpha = jxr_get_ALPHACHANNEL_FLAG(image);
bpc = jxr_get_CONTAINER_BPC(image);
for (k = 0; k < comps + alpha; k++)
{
switch (bpc)
{
default: fz_throw(ctx, FZ_ERROR_GENERIC, "unknown sample type: %d", bpc);
case JXR_BD1WHITE1: dp[k] = sp[k] ? 255 : 0; break;
case JXR_BD1BLACK1: dp[k] = sp[k] ? 0 : 255; break;
case JXR_BD5: dp[k] = sp[k] << 3; break;
case JXR_BD8: dp[k] = sp[k]; break;
case JXR_BD10: dp[k] = sp[k] >> 2; break;
case JXR_BD16: dp[k] = sp[k] >> 8; break;
case JXR_BD16S:
v = sp[k] * (1.0f / (1 << 13));
goto decode_float32;
case JXR_BD32S:
v = sp[k] * (1.0f / (1 << 24));
goto decode_float32;
case JXR_BD16F:
v = float32_from_float16(sp[k]);
goto decode_float32;
case JXR_BD32F:
v = float32_from_int32_bits(sp[k]);
goto decode_float32;
decode_float32:
if (k < comps)
dp[k] = sRGB_from_scRGB(fz_clamp(v, 0, 1)) * 255 + 0.5f;
else
dp[k] = fz_clamp(v, 0, 1) * 255 + 0.5f;
break;
}
}
}
static size_t
fz_shade_size(fz_context *ctx, fz_shade *s)
{
if (s == NULL)
return 0;
if (s->type == FZ_FUNCTION_BASED)
return sizeof(*s) + sizeof(float) * s->u.f.xdivs * s->u.f.ydivs * fz_colorspace_n(ctx, s->colorspace);
return sizeof(*s) + fz_compressed_buffer_size(s->buffer);
}
static void
pdf_sample_composite_shade_function(fz_context *ctx, fz_shade *shade, pdf_function *func, float t0, float t1)
{
int i, n;
float t;
n = fz_colorspace_n(ctx, shade->colorspace);
for (i = 0; i < 256; i++)
{
t = t0 + (i / 255.0f) * (t1 - t0);
pdf_eval_function(ctx, func, &t, 1, shade->function[i], n);
shade->function[i][n] = 1;
}
}
static void
pdf_load_function_based_shading(fz_context *ctx, pdf_document *doc, fz_shade *shade, pdf_obj *dict, pdf_function *func)
{
pdf_obj *obj;
float x0, y0, x1, y1;
float fv[2];
fz_matrix matrix;
int xx, yy;
float *p;
int n = fz_colorspace_n(ctx, shade->colorspace);
x0 = y0 = 0;
x1 = y1 = 1;
obj = pdf_dict_get(ctx, dict, PDF_NAME(Domain));
if (obj)
{
x0 = pdf_array_get_real(ctx, obj, 0);
x1 = pdf_array_get_real(ctx, obj, 1);
y0 = pdf_array_get_real(ctx, obj, 2);
y1 = pdf_array_get_real(ctx, obj, 3);
}
obj = pdf_dict_get(ctx, dict, PDF_NAME(Matrix));
if (obj)
pdf_to_matrix(ctx, obj, &matrix);
else
matrix = fz_identity;
shade->u.f.matrix = matrix;
shade->u.f.xdivs = FUNSEGS;
shade->u.f.ydivs = FUNSEGS;
shade->u.f.fn_vals = fz_malloc(ctx, (FUNSEGS+1)*(FUNSEGS+1)*n*sizeof(float));
shade->u.f.domain[0][0] = x0;
shade->u.f.domain[0][1] = y0;
shade->u.f.domain[1][0] = x1;
shade->u.f.domain[1][1] = y1;
p = shade->u.f.fn_vals;
for (yy = 0; yy <= FUNSEGS; yy++)
{
fv[1] = y0 + (y1 - y0) * yy / FUNSEGS;
for (xx = 0; xx <= FUNSEGS; xx++)
{
fv[0] = x0 + (x1 - x0) * xx / FUNSEGS;
pdf_eval_function(ctx, func, fv, 2, p, n);
p += n;
}
}
}
static void
pdf_process_extgstate(fz_context *ctx, pdf_processor *proc, pdf_csi *csi, pdf_obj *dict)
{
pdf_obj *obj;
obj = pdf_dict_get(ctx, dict, PDF_NAME_LW);
if (pdf_is_number(ctx, obj) && proc->op_w)
proc->op_w(ctx, proc, pdf_to_real(ctx, obj));
obj = pdf_dict_get(ctx, dict, PDF_NAME_LC);
if (pdf_is_int(ctx, obj) && proc->op_J)
proc->op_J(ctx, proc, fz_clampi(pdf_to_int(ctx, obj), 0, 2));
obj = pdf_dict_get(ctx, dict, PDF_NAME_LJ);
if (pdf_is_int(ctx, obj) && proc->op_j)
proc->op_j(ctx, proc, fz_clampi(pdf_to_int(ctx, obj), 0, 2));
obj = pdf_dict_get(ctx, dict, PDF_NAME_ML);
if (pdf_is_number(ctx, obj) && proc->op_M)
proc->op_M(ctx, proc, pdf_to_real(ctx, obj));
obj = pdf_dict_get(ctx, dict, PDF_NAME_D);
if (pdf_is_array(ctx, obj) && proc->op_d)
{
pdf_obj *dash_array = pdf_array_get(ctx, obj, 0);
pdf_obj *dash_phase = pdf_array_get(ctx, obj, 1);
proc->op_d(ctx, proc, dash_array, pdf_to_real(ctx, dash_phase));
}
obj = pdf_dict_get(ctx, dict, PDF_NAME_RI);
if (pdf_is_name(ctx, obj) && proc->op_ri)
proc->op_ri(ctx, proc, pdf_to_name(ctx, obj));
obj = pdf_dict_get(ctx, dict, PDF_NAME_FL);
if (pdf_is_number(ctx, obj) && proc->op_i)
proc->op_i(ctx, proc, pdf_to_real(ctx, obj));
obj = pdf_dict_get(ctx, dict, PDF_NAME_Font);
if (pdf_is_array(ctx, obj) && proc->op_Tf)
{
pdf_obj *font_ref = pdf_array_get(ctx, obj, 0);
pdf_obj *font_size = pdf_array_get(ctx, obj, 1);
pdf_font_desc *font = load_font_or_hail_mary(ctx, csi->doc, csi->rdb, font_ref, 0, csi->cookie);
fz_try(ctx)
proc->op_Tf(ctx, proc, "ExtGState", font, pdf_to_real(ctx, font_size));
fz_always(ctx)
pdf_drop_font(ctx, font);
fz_catch(ctx)
fz_rethrow(ctx);
}
/* transfer functions */
obj = pdf_dict_get(ctx, dict, PDF_NAME_TR2);
if (pdf_is_name(ctx, obj))
if (!pdf_name_eq(ctx, obj, PDF_NAME_Identity) && !pdf_name_eq(ctx, obj, PDF_NAME_Default))
fz_warn(ctx, "ignoring transfer function");
if (!obj) /* TR is ignored in the presence of TR2 */
{
pdf_obj *tr = pdf_dict_get(ctx, dict, PDF_NAME_TR);
if (pdf_is_name(ctx, tr))
if (!pdf_name_eq(ctx, tr, PDF_NAME_Identity))
fz_warn(ctx, "ignoring transfer function");
}
/* transparency state */
obj = pdf_dict_get(ctx, dict, PDF_NAME_CA);
if (pdf_is_number(ctx, obj) && proc->op_gs_CA)
proc->op_gs_CA(ctx, proc, pdf_to_real(ctx, obj));
obj = pdf_dict_get(ctx, dict, PDF_NAME_ca);
if (pdf_is_number(ctx, obj) && proc->op_gs_ca)
proc->op_gs_ca(ctx, proc, pdf_to_real(ctx, obj));
obj = pdf_dict_get(ctx, dict, PDF_NAME_BM);
if (pdf_is_array(ctx, obj))
obj = pdf_array_get(ctx, obj, 0);
if (pdf_is_name(ctx, obj) && proc->op_gs_BM)
proc->op_gs_BM(ctx, proc, pdf_to_name(ctx, obj));
obj = pdf_dict_get(ctx, dict, PDF_NAME_SMask);
if (proc->op_gs_SMask)
{
if (pdf_is_dict(ctx, obj))
{
pdf_xobject *xobj;
pdf_obj *group, *s, *bc, *tr;
float softmask_bc[FZ_MAX_COLORS];
fz_colorspace *colorspace;
int colorspace_n = 1;
int k, luminosity;
fz_var(xobj);
group = pdf_dict_get(ctx, obj, PDF_NAME_G);
if (!group)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot load softmask xobject (%d 0 R)", pdf_to_num(ctx, obj));
xobj = pdf_load_xobject(ctx, csi->doc, group);
fz_try(ctx)
{
colorspace = pdf_xobject_colorspace(ctx, xobj);
if (colorspace)
{
colorspace_n = fz_colorspace_n(ctx, colorspace);
fz_drop_colorspace(ctx, colorspace);
}
/* Default background color is black. */
for (k = 0; k < colorspace_n; k++)
softmask_bc[k] = 0;
/* Which in CMYK means not all zeros! This should really be
* a test for subtractive color spaces, but this will have
* to do for now. */
if (colorspace == fz_device_cmyk(ctx))
softmask_bc[3] = 1.0;
bc = pdf_dict_get(ctx, obj, PDF_NAME_BC);
if (pdf_is_array(ctx, bc))
{
for (k = 0; k < colorspace_n; k++)
softmask_bc[k] = pdf_to_real(ctx, pdf_array_get(ctx, bc, k));
}
s = pdf_dict_get(ctx, obj, PDF_NAME_S);
if (pdf_name_eq(ctx, s, PDF_NAME_Luminosity))
luminosity = 1;
else
luminosity = 0;
tr = pdf_dict_get(ctx, obj, PDF_NAME_TR);
if (tr && !pdf_name_eq(ctx, tr, PDF_NAME_Identity))
fz_warn(ctx, "ignoring transfer function");
proc->op_gs_SMask(ctx, proc, xobj, csi->rdb, softmask_bc, luminosity);
}
fz_always(ctx)
{
pdf_drop_xobject(ctx, xobj);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
else if (pdf_is_name(ctx, obj) && pdf_name_eq(ctx, obj, PDF_NAME_None))
{
proc->op_gs_SMask(ctx, proc, NULL, NULL, NULL, 0);
}
}
static void
jxr_read_image(fz_context *ctx, unsigned char *data, int size, struct info *info, int only_metadata)
{
jxr_container_t container;
jxr_image_t image = NULL;
jxr_image_t alpha = NULL;
int rc, i;
fz_try(ctx)
{
container = jxr_create_container();
rc = jxr_read_image_container_memory(container, data, size);
if (rc < 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot read jxr image container: %s", jxr_error_string(rc));
info->xres = jxrc_width_resolution(container, 0);
info->yres = jxrc_height_resolution(container, 0);
info->width = jxrc_image_width(container, 0);
info->height = jxrc_image_height(container, 0);
info->format = jxrc_image_pixelformat(container, 0);
for (i = 0; i < nelem(pixelformats); i++)
if (pixelformats[i].format == info->format)
{
info->comps = pixelformats[i].comps;
break;
}
if (i == nelem(pixelformats))
fz_throw(ctx, FZ_ERROR_GENERIC, "unsupported pixel format: %u", info->format);
if (info->comps == 1)
info->cspace = fz_device_gray(ctx);
else if (info->comps == 3)
info->cspace = fz_device_rgb(ctx);
else if (info->comps >= 4)
info->cspace = fz_device_cmyk(ctx);
info->stride = info->width * (fz_colorspace_n(ctx, info->cspace) + 1);
if (!only_metadata)
{
unsigned long image_offset;
unsigned char image_band;
unsigned long alpha_offset;
unsigned char alpha_band;
info->ctx = ctx;
info->samples = fz_malloc(ctx, info->stride * info->height);
memset(info->samples, 0xff, info->stride * info->height);
image_offset = jxrc_image_offset(container, 0);
image_band = jxrc_image_band_presence(container, 0);
alpha_offset = jxrc_alpha_offset(container, 0);
alpha_band = jxrc_alpha_band_presence(container, 0);
image = jxr_create_input();
jxr_set_PROFILE_IDC(image, 111);
jxr_set_LEVEL_IDC(image, 255);
jxr_set_pixel_format(image, info->format);
jxr_set_container_parameters(image, info->format,
info->width, info->height, alpha_offset,
image_band, alpha_band, 0);
jxr_set_user_data(image, info);
jxr_set_block_output(image, jxr_decode_block);
rc = jxr_read_image_bitstream_memory(image, data + image_offset, size - image_offset);
if (rc < 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot read jxr image: %s", jxr_error_string(rc));
if (info->format == JXRC_FMT_32bppPBGRA ||
info->format == JXRC_FMT_64bppPRGBA ||
info->format == JXRC_FMT_128bppPRGBAFloat)
info->has_premul = 1;
if (jxr_get_ALPHACHANNEL_FLAG(image))
info->has_alpha = 1;
if (alpha_offset > 0)
{
info->has_alpha = 1;
alpha = jxr_create_input();
jxr_set_PROFILE_IDC(alpha, 111);
jxr_set_LEVEL_IDC(alpha, 255);
jxr_set_pixel_format(alpha, info->format);
jxr_set_container_parameters(alpha, info->format,
info->width, info->height, alpha_offset,
image_band, alpha_band, 1);
jxr_set_user_data(alpha, info);
jxr_set_block_output(alpha, jxr_decode_block_alpha);
rc = jxr_read_image_bitstream_memory(alpha, data + alpha_offset, size - alpha_offset);
if (rc < 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot read jxr image: %s", jxr_error_string(rc));
}
}
}
fz_always(ctx)
{
if (alpha)
jxr_destroy(alpha);
if (image)
jxr_destroy(image);
jxr_destroy_container(container);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
static fz_pixmap *
pam_binary_read_image(fz_context *ctx, struct info *pnm, const unsigned char *p, const unsigned char *e, int onlymeta, const unsigned char **out)
{
fz_pixmap *img = NULL;
int bitmap = 0;
int minval = 1;
int maxval = 65535;
fz_var(img);
p = pam_binary_read_header(ctx, pnm, p, e);
if (pnm->tupletype == PAM_UNKNOWN)
switch (pnm->depth)
{
case 1: pnm->tupletype = pnm->maxval == 1 ? PAM_BW : PAM_GRAY; break;
case 2: pnm->tupletype = pnm->maxval == 1 ? PAM_BWA : PAM_GRAYA; break;
case 3: pnm->tupletype = PAM_RGB; break;
case 4: pnm->tupletype = PAM_CMYK; break;
case 5: pnm->tupletype = PAM_CMYKA; break;
default:
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot guess tuple type based on depth in pnm image");
}
if (pnm->tupletype == PAM_BW && pnm->maxval > 1)
pnm->tupletype = PAM_GRAY;
else if (pnm->tupletype == PAM_GRAY && pnm->maxval == 1)
pnm->tupletype = PAM_BW;
else if (pnm->tupletype == PAM_BWA && pnm->maxval > 1)
pnm->tupletype = PAM_GRAYA;
else if (pnm->tupletype == PAM_GRAYA && pnm->maxval == 1)
pnm->tupletype = PAM_BWA;
switch (pnm->tupletype)
{
case PAM_BWA:
pnm->alpha = 1;
/* fallthrough */
case PAM_BW:
pnm->cs = fz_device_gray(ctx);
maxval = 1;
bitmap = 1;
break;
case PAM_GRAYA:
pnm->alpha = 1;
/* fallthrough */
case PAM_GRAY:
pnm->cs = fz_device_gray(ctx);
minval = 2;
break;
case PAM_RGBA:
pnm->alpha = 1;
/* fallthrough */
case PAM_RGB:
pnm->cs = fz_device_rgb(ctx);
break;
case PAM_CMYKA:
pnm->alpha = 1;
/* fallthrough */
case PAM_CMYK:
pnm->cs = fz_device_cmyk(ctx);
break;
default:
fz_throw(ctx, FZ_ERROR_GENERIC, "unsupported tuple type");
}
if (pnm->depth != fz_colorspace_n(ctx, pnm->cs) + pnm->alpha)
fz_throw(ctx, FZ_ERROR_GENERIC, "depth out of tuple type range");
if (pnm->maxval < minval || pnm->maxval > maxval)
fz_throw(ctx, FZ_ERROR_GENERIC, "maxval out of range");
pnm->bitdepth = bitdepth_from_maxval(pnm->maxval);
if (pnm->height <= 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "image height must be > 0");
if (pnm->width <= 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "image width must be > 0");
if ((unsigned int)pnm->height > UINT_MAX / pnm->width / fz_colorspace_n(ctx, pnm->cs) / (pnm->bitdepth / 8 + 1))
fz_throw(ctx, FZ_ERROR_GENERIC, "image too large");
if (onlymeta)
{
int packed;
int w, h, n;
w = pnm->width;
h = pnm->height;
n = fz_colorspace_n(ctx, pnm->cs) + pnm->alpha;
/* some encoders incorrectly pack bits into bytes and invert the image */
packed = 0;
if (pnm->maxval == 1) {
const unsigned char *e_packed = p + w * h * n / 8;
if (e_packed < e - 1 && e_packed[0] == 'P' && e_packed[1] >= '0' && e_packed[1] <= '7')
e = e_packed;
if (e - p < w * h * n)
packed = 1;
}
if (packed && e - p < w * h * n / 8)
fz_throw(ctx, FZ_ERROR_GENERIC, "truncated packed image");
if (!packed && e - p < w * h * n * (pnm->maxval < 256 ? 1 : 2))
fz_throw(ctx, FZ_ERROR_GENERIC, "truncated image");
if (pnm->maxval == 255)
p += n * w * h;
else if (bitmap && packed)
p += ((w + 7) / 8) * h;
else if (bitmap)
p += n * w * h;
else if (pnm->maxval < 255)
p += n * w * h;
else
p += 2 * n * w * h;
}
if (!onlymeta)
{
unsigned char *dp;
int x, y, k, packed;
int w, h, n;
img = fz_new_pixmap(ctx, pnm->cs, pnm->width, pnm->height, NULL, pnm->alpha);
fz_try(ctx)
{
dp = img->samples;
w = img->w;
h = img->h;
n = img->n;
/* some encoders incorrectly pack bits into bytes and invert the image */
packed = 0;
if (pnm->maxval == 1) {
const unsigned char *e_packed = p + w * h * n / 8;
if (e_packed < e - 1 && e_packed[0] == 'P' && e_packed[1] >= '0' && e_packed[1] <= '7')
e = e_packed;
if (e - p < w * h * n)
packed = 1;
}
if (packed && e - p < w * h * n / 8)
fz_throw(ctx, FZ_ERROR_GENERIC, "truncated packed image");
if (!packed && e - p < w * h * n * (pnm->maxval < 256 ? 1 : 2))
fz_throw(ctx, FZ_ERROR_GENERIC, "truncated image");
if (pnm->maxval == 255)
memcpy(dp, p, w * h * n);
else if (bitmap && packed)
{
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
{
for (k = 0; k < n; k++)
{
*dp++ = (*p & (1 << (7 - (x & 0x7)))) ? 0x00 : 0xff;
if ((x & 0x7) == 7)
p++;
}
if (w & 0x7)
p++;
}
}
else if (bitmap)
{
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
for (k = 0; k < n; k++)
*dp++ = *p++ ? 0xff : 0x00;
}
else if (pnm->maxval < 255)
{
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
for (k = 0; k < n; k++)
*dp++ = map_color(ctx, *p++, pnm->maxval, 255);
}
else
{
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
for (k = 0; k < n; k++)
{
*dp++ = map_color(ctx, (p[0] << 8) | p[1], pnm->maxval, 255);
p += 2;
}
}
if (pnm->alpha)
fz_premultiply_pixmap(ctx, img);
}
fz_catch(ctx)
{
fz_drop_pixmap(ctx, img);
fz_rethrow(ctx);
}
}
static fz_pixmap *
pnm_binary_read_image(fz_context *ctx, struct info *pnm, const unsigned char *p, const unsigned char *e, int onlymeta, int bitmap, const unsigned char **out)
{
fz_pixmap *img = NULL;
pnm->width = 0;
p = pnm_read_number(ctx, p, e, &pnm->width);
p = pnm_read_white(ctx, p, e, 0);
if (bitmap)
{
pnm->height = 0;
p = pnm_read_number(ctx, p, e, &pnm->height);
p = pnm_read_white(ctx, p, e, 1);
pnm->maxval = 1;
}
else
{
pnm->height = 0;
p = pnm_read_number(ctx, p, e, &pnm->height);
p = pnm_read_white(ctx, p, e, 0);
pnm->maxval = 0;
p = pnm_read_number(ctx, p, e, &pnm->maxval);
p = pnm_read_white(ctx, p, e, 1);
}
if (pnm->maxval <= 0 || pnm->maxval >= 65536)
fz_throw(ctx, FZ_ERROR_GENERIC, "maximum sample value of out range in pnm image: %d", pnm->maxval);
pnm->bitdepth = bitdepth_from_maxval(pnm->maxval);
if (pnm->height <= 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "image height must be > 0");
if (pnm->width <= 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "image width must be > 0");
if ((unsigned int)pnm->height > UINT_MAX / pnm->width / fz_colorspace_n(ctx, pnm->cs) / (pnm->bitdepth / 8 + 1))
fz_throw(ctx, FZ_ERROR_GENERIC, "image too large");
if (onlymeta)
{
int w = pnm->width;
int h = pnm->height;
int n = fz_colorspace_n(ctx, pnm->cs);
if (pnm->maxval == 255)
p += n * w * h;
else if (bitmap)
p += ((w + 7) / 8) * h;
else if (pnm->maxval < 255)
p += n * w * h;
else
p += 2 * n * w * h;
}
else
{
unsigned char *dp;
int x, y, k;
int w, h, n;
img = fz_new_pixmap(ctx, pnm->cs, pnm->width, pnm->height, NULL, 0);
dp = img->samples;
w = img->w;
h = img->h;
n = img->n;
if (pnm->maxval == 255) {
memcpy(dp, p, w * h * n);
p += n * w * h;
}
else if (bitmap)
{
for (y = 0; y < h; y++)
{
for (x = 0; x < w; x++)
{
*dp++ = (*p & (1 << (7 - (x & 0x7)))) ? 0x00 : 0xff;
if ((x & 0x7) == 7)
p++;
}
if (w & 0x7)
p++;
}
}
else if (pnm->maxval < 255)
{
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
for (k = 0; k < n; k++)
*dp++ = map_color(ctx, *p++, pnm->maxval, 255);
}
else
{
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
for (k = 0; k < n; k++)
{
*dp++ = map_color(ctx, (p[0] << 8) | p[1], pnm->maxval, 255);
p += 2;
}
}
}
if (out)
*out = p;
return img;
}
static fz_pixmap *
pnm_ascii_read_image(fz_context *ctx, struct info *pnm, const unsigned char *p, const unsigned char *e, int onlymeta, int bitmap, const unsigned char **out)
{
fz_pixmap *img = NULL;
p = pnm_read_number(ctx, p, e, &pnm->width);
p = pnm_read_white(ctx, p, e, 0);
if (bitmap)
{
p = pnm_read_number(ctx, p, e, &pnm->height);
p = pnm_read_white(ctx, p, e, 1);
pnm->maxval = 1;
}
else
{
p = pnm_read_number(ctx, p, e, &pnm->height);
p = pnm_read_white(ctx, p, e, 0);
p = pnm_read_number(ctx, p, e, &pnm->maxval);
p = pnm_read_white(ctx, p, e, 0);
}
if (pnm->maxval <= 0 || pnm->maxval >= 65536)
fz_throw(ctx, FZ_ERROR_GENERIC, "maximum sample value of out range in pnm image: %d", pnm->maxval);
pnm->bitdepth = bitdepth_from_maxval(pnm->maxval);
if (pnm->height <= 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "image height must be > 0");
if (pnm->width <= 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "image width must be > 0");
if ((unsigned int)pnm->height > UINT_MAX / pnm->width / fz_colorspace_n(ctx, pnm->cs) / (pnm->bitdepth / 8 + 1))
fz_throw(ctx, FZ_ERROR_GENERIC, "image too large");
if (onlymeta)
{
int x, y, k;
int w, h, n;
w = pnm->width;
h = pnm->height;
n = fz_colorspace_n(ctx, pnm->cs);
if (bitmap)
{
for (y = 0; y < h; y++)
for (x = -1; x < w; x++)
{
p = pnm_read_number(ctx, p, e, NULL);
p = pnm_read_white(ctx, p, e, 0);
}
}
else
{
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
for (k = 0; k < n; k++)
{
p = pnm_read_number(ctx, p, e, NULL);
p = pnm_read_white(ctx, p, e, 0);
}
}
}
else
{
unsigned char *dp;
int x, y, k;
int w, h, n;
img = fz_new_pixmap(ctx, pnm->cs, pnm->width, pnm->height, NULL, 0);
dp = img->samples;
w = img->w;
h = img->h;
n = img->n;
if (bitmap)
{
for (y = 0; y < h; y++)
{
for (x = 0; x < w; x++)
{
int v = 0;
p = pnm_read_number(ctx, p, e, &v);
p = pnm_read_white(ctx, p, e, 0);
*dp++ = v ? 0x00 : 0xff;
}
}
}
else
{
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
for (k = 0; k < n; k++)
{
int v = 0;
p = pnm_read_number(ctx, p, e, &v);
p = pnm_read_white(ctx, p, e, 0);
v = fz_clampi(v, 0, pnm->maxval);
*dp++ = map_color(ctx, v, pnm->maxval, 255);
}
}
}
if (out)
*out = p;
return img;
}
static fz_shade *
pdf_load_shading_dict(fz_context *ctx, pdf_document *doc, pdf_obj *dict, const fz_matrix *transform)
{
fz_shade *shade = NULL;
pdf_function *func[FZ_MAX_COLORS] = { NULL };
pdf_obj *obj;
int funcs = 0;
int type = 0;
int i, in, out, n;
fz_var(shade);
fz_var(func);
fz_var(funcs);
fz_var(type);
fz_try(ctx)
{
shade = fz_malloc_struct(ctx, fz_shade);
FZ_INIT_STORABLE(shade, 1, fz_drop_shade_imp);
shade->type = FZ_MESH_TYPE4;
shade->use_background = 0;
shade->use_function = 0;
shade->matrix = *transform;
shade->bbox = fz_infinite_rect;
shade->colorspace = NULL;
funcs = 0;
obj = pdf_dict_get(ctx, dict, PDF_NAME(ShadingType));
type = pdf_to_int(ctx, obj);
obj = pdf_dict_get(ctx, dict, PDF_NAME(ColorSpace));
if (!obj)
fz_throw(ctx, FZ_ERROR_SYNTAX, "shading colorspace is missing");
shade->colorspace = pdf_load_colorspace(ctx, obj);
n = fz_colorspace_n(ctx, shade->colorspace);
obj = pdf_dict_get(ctx, dict, PDF_NAME(Background));
if (obj)
{
shade->use_background = 1;
for (i = 0; i < n; i++)
shade->background[i] = pdf_array_get_real(ctx, obj, i);
}
obj = pdf_dict_get(ctx, dict, PDF_NAME(BBox));
if (pdf_is_array(ctx, obj))
pdf_to_rect(ctx, obj, &shade->bbox);
obj = pdf_dict_get(ctx, dict, PDF_NAME(Function));
if (pdf_is_dict(ctx, obj))
{
funcs = 1;
if (type == 1)
in = 2;
else
in = 1;
out = n;
func[0] = pdf_load_function(ctx, obj, in, out);
if (!func[0])
fz_throw(ctx, FZ_ERROR_SYNTAX, "cannot load shading function (%d 0 R)", pdf_to_num(ctx, obj));
}
else if (pdf_is_array(ctx, obj))
{
funcs = pdf_array_len(ctx, obj);
if (funcs != 1 && funcs != n)
{
funcs = 0;
fz_throw(ctx, FZ_ERROR_SYNTAX, "incorrect number of shading functions");
}
if (funcs > FZ_MAX_COLORS)
{
funcs = 0;
fz_throw(ctx, FZ_ERROR_SYNTAX, "too many shading functions");
}
if (type == 1)
in = 2;
else
in = 1;
out = 1;
for (i = 0; i < funcs; i++)
{
func[i] = pdf_load_function(ctx, pdf_array_get(ctx, obj, i), in, out);
if (!func[i])
fz_throw(ctx, FZ_ERROR_SYNTAX, "cannot load shading function (%d 0 R)", pdf_to_num(ctx, obj));
}
}
else if (type < 4)
{
/* Functions are compulsory for types 1,2,3 */
fz_throw(ctx, FZ_ERROR_SYNTAX, "cannot load shading function (%d 0 R)", pdf_to_num(ctx, obj));
}
shade->type = type;
switch (type)
{
case 1: pdf_load_function_based_shading(ctx, doc, shade, dict, func[0]); break;
case 2: pdf_load_linear_shading(ctx, doc, shade, dict, funcs, func); break;
case 3: pdf_load_radial_shading(ctx, doc, shade, dict, funcs, func); break;
case 4: pdf_load_type4_shade(ctx, doc, shade, dict, funcs, func); break;
case 5: pdf_load_type5_shade(ctx, doc, shade, dict, funcs, func); break;
case 6: pdf_load_type6_shade(ctx, doc, shade, dict, funcs, func); break;
case 7: pdf_load_type7_shade(ctx, doc, shade, dict, funcs, func); break;
default:
fz_throw(ctx, FZ_ERROR_SYNTAX, "unknown shading type: %d", type);
}
}
fz_always(ctx)
{
for (i = 0; i < funcs; i++)
pdf_drop_function(ctx, func[i]);
}
fz_catch(ctx)
{
fz_drop_shade(ctx, shade);
fz_rethrow(ctx);
}
return shade;
}
static fz_image *
pdf_load_image_imp(fz_context *ctx, pdf_document *doc, pdf_obj *rdb, pdf_obj *dict, fz_stream *cstm, int forcemask)
{
fz_image *image = NULL;
pdf_obj *obj, *res;
int w, h, bpc, n;
int imagemask;
int interpolate;
int indexed;
fz_image *mask = NULL; /* explicit mask/soft mask image */
int use_colorkey = 0;
fz_colorspace *colorspace = NULL;
float decode[FZ_MAX_COLORS * 2];
int colorkey[FZ_MAX_COLORS * 2];
int stride;
int i;
fz_compressed_buffer *buffer;
/* special case for JPEG2000 images */
if (pdf_is_jpx_image(ctx, dict))
return pdf_load_jpx_imp(ctx, doc, rdb, dict, cstm, forcemask);
w = pdf_to_int(ctx, pdf_dict_geta(ctx, dict, PDF_NAME(Width), PDF_NAME(W)));
h = pdf_to_int(ctx, pdf_dict_geta(ctx, dict, PDF_NAME(Height), PDF_NAME(H)));
bpc = pdf_to_int(ctx, pdf_dict_geta(ctx, dict, PDF_NAME(BitsPerComponent), PDF_NAME(BPC)));
if (bpc == 0)
bpc = 8;
imagemask = pdf_to_bool(ctx, pdf_dict_geta(ctx, dict, PDF_NAME(ImageMask), PDF_NAME(IM)));
interpolate = pdf_to_bool(ctx, pdf_dict_geta(ctx, dict, PDF_NAME(Interpolate), PDF_NAME(I)));
indexed = 0;
use_colorkey = 0;
if (imagemask)
bpc = 1;
if (w <= 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "image width is zero (or less)");
if (h <= 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "image height is zero (or less)");
if (bpc <= 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "image depth is zero (or less)");
if (bpc > 16)
fz_throw(ctx, FZ_ERROR_GENERIC, "image depth is too large: %d", bpc);
if (w > (1 << 16))
fz_throw(ctx, FZ_ERROR_GENERIC, "image is too wide");
if (h > (1 << 16))
fz_throw(ctx, FZ_ERROR_GENERIC, "image is too high");
fz_var(mask);
fz_var(image);
fz_var(colorspace);
fz_try(ctx)
{
obj = pdf_dict_geta(ctx, dict, PDF_NAME(ColorSpace), PDF_NAME(CS));
if (obj && !imagemask && !forcemask)
{
/* colorspace resource lookup is only done for inline images */
if (pdf_is_name(ctx, obj))
{
res = pdf_dict_get(ctx, pdf_dict_get(ctx, rdb, PDF_NAME(ColorSpace)), obj);
if (res)
obj = res;
}
colorspace = pdf_load_colorspace(ctx, obj);
indexed = fz_colorspace_is_indexed(ctx, colorspace);
n = fz_colorspace_n(ctx, colorspace);
}
else
{
n = 1;
}
obj = pdf_dict_geta(ctx, dict, PDF_NAME(Decode), PDF_NAME(D));
if (obj)
{
for (i = 0; i < n * 2; i++)
decode[i] = pdf_array_get_real(ctx, obj, i);
}
else if (fz_colorspace_is_lab(ctx, colorspace) || fz_colorspace_is_lab_icc(ctx, colorspace))
{
decode[0] = 0;
decode[1] = 100;
decode[2] = -128;
decode[3] = 127;
decode[4] = -128;
decode[5] = 127;
}
else
{
float maxval = indexed ? (1 << bpc) - 1 : 1;
for (i = 0; i < n * 2; i++)
decode[i] = i & 1 ? maxval : 0;
}
obj = pdf_dict_geta(ctx, dict, PDF_NAME(SMask), PDF_NAME(Mask));
if (pdf_is_dict(ctx, obj))
{
/* Not allowed for inline images or soft masks */
if (cstm)
fz_warn(ctx, "Ignoring invalid inline image soft mask");
else if (forcemask)
fz_warn(ctx, "Ignoring recursive image soft mask");
else
{
mask = pdf_load_image_imp(ctx, doc, rdb, obj, NULL, 1);
obj = pdf_dict_get(ctx, obj, PDF_NAME(Matte));
if (pdf_is_array(ctx, obj))
{
use_colorkey = 1;
for (i = 0; i < n; i++)
colorkey[i] = pdf_array_get_real(ctx, obj, i) * 255;
}
}
}
else if (pdf_is_array(ctx, obj))
{
use_colorkey = 1;
for (i = 0; i < n * 2; i++)
{
if (!pdf_is_int(ctx, pdf_array_get(ctx, obj, i)))
{
fz_warn(ctx, "invalid value in color key mask");
use_colorkey = 0;
}
colorkey[i] = pdf_array_get_int(ctx, obj, i);
}
}
/* Do we load from a ref, or do we load an inline stream? */
if (cstm == NULL)
{
/* Just load the compressed image data now and we can decode it on demand. */
buffer = pdf_load_compressed_stream(ctx, doc, pdf_to_num(ctx, dict));
image = fz_new_image_from_compressed_buffer(ctx, w, h, bpc, colorspace, 96, 96, interpolate, imagemask, decode, use_colorkey ? colorkey : NULL, buffer, mask);
image->invert_cmyk_jpeg = 0;
}
else
{
/* Inline stream */
stride = (w * n * bpc + 7) / 8;
image = fz_new_image_from_compressed_buffer(ctx, w, h, bpc, colorspace, 96, 96, interpolate, imagemask, decode, use_colorkey ? colorkey : NULL, NULL, mask);
image->invert_cmyk_jpeg = 0;
pdf_load_compressed_inline_image(ctx, doc, dict, stride * h, cstm, indexed, (fz_compressed_image *)image);
}
}
fz_always(ctx)
{
fz_drop_colorspace(ctx, colorspace);
fz_drop_image(ctx, mask);
}
fz_catch(ctx)
{
fz_drop_image(ctx, image);
fz_rethrow(ctx);
}
return image;
}
pdf_obj *
pdf_add_image(fz_context *ctx, pdf_document *doc, fz_image *image)
{
fz_pixmap *pixmap = NULL;
pdf_obj *imobj = NULL;
pdf_obj *dp;
fz_buffer *buffer = NULL;
pdf_obj *imref = NULL;
fz_compressed_buffer *cbuffer;
unsigned char digest[16];
int i, n;
/* If we can maintain compression, do so */
cbuffer = fz_compressed_image_buffer(ctx, image);
fz_var(pixmap);
fz_var(buffer);
fz_var(imobj);
fz_var(imref);
/* Check if the same image already exists in this doc. */
imref = pdf_find_image_resource(ctx, doc, image, digest);
if (imref)
return imref;
imobj = pdf_add_new_dict(ctx, doc, 3);
fz_try(ctx)
{
dp = pdf_dict_put_dict(ctx, imobj, PDF_NAME(DecodeParms), 3);
pdf_dict_put(ctx, imobj, PDF_NAME(Type), PDF_NAME(XObject));
pdf_dict_put(ctx, imobj, PDF_NAME(Subtype), PDF_NAME(Image));
if (cbuffer)
{
fz_compression_params *cp = &cbuffer->params;
switch (cp ? cp->type : FZ_IMAGE_UNKNOWN)
{
default:
goto raw_or_unknown_compression;
case FZ_IMAGE_JPEG:
if (cp->u.jpeg.color_transform != -1)
pdf_dict_put_int(ctx, dp, PDF_NAME(ColorTransform), cp->u.jpeg.color_transform);
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(DCTDecode));
break;
case FZ_IMAGE_JPX:
if (cp->u.jpx.smask_in_data)
pdf_dict_put_int(ctx, dp, PDF_NAME(SMaskInData), cp->u.jpx.smask_in_data);
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(JPXDecode));
break;
case FZ_IMAGE_FAX:
if (cp->u.fax.columns)
pdf_dict_put_int(ctx, dp, PDF_NAME(Columns), cp->u.fax.columns);
if (cp->u.fax.rows)
pdf_dict_put_int(ctx, dp, PDF_NAME(Rows), cp->u.fax.rows);
if (cp->u.fax.k)
pdf_dict_put_int(ctx, dp, PDF_NAME(K), cp->u.fax.k);
if (cp->u.fax.end_of_line)
pdf_dict_put_bool(ctx, dp, PDF_NAME(EndOfLine), cp->u.fax.end_of_line);
if (cp->u.fax.encoded_byte_align)
pdf_dict_put_bool(ctx, dp, PDF_NAME(EncodedByteAlign), cp->u.fax.encoded_byte_align);
if (cp->u.fax.end_of_block)
pdf_dict_put_bool(ctx, dp, PDF_NAME(EndOfBlock), cp->u.fax.end_of_block);
if (cp->u.fax.black_is_1)
pdf_dict_put_bool(ctx, dp, PDF_NAME(BlackIs1), cp->u.fax.black_is_1);
if (cp->u.fax.damaged_rows_before_error)
pdf_dict_put_int(ctx, dp, PDF_NAME(DamagedRowsBeforeError), cp->u.fax.damaged_rows_before_error);
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(CCITTFaxDecode));
break;
case FZ_IMAGE_FLATE:
if (cp->u.flate.columns)
pdf_dict_put_int(ctx, dp, PDF_NAME(Columns), cp->u.flate.columns);
if (cp->u.flate.colors)
pdf_dict_put_int(ctx, dp, PDF_NAME(Colors), cp->u.flate.colors);
if (cp->u.flate.predictor)
pdf_dict_put_int(ctx, dp, PDF_NAME(Predictor), cp->u.flate.predictor);
if (cp->u.flate.bpc)
pdf_dict_put_int(ctx, dp, PDF_NAME(BitsPerComponent), cp->u.flate.bpc);
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(FlateDecode));
pdf_dict_put_int(ctx, imobj, PDF_NAME(BitsPerComponent), image->bpc);
break;
case FZ_IMAGE_LZW:
if (cp->u.lzw.columns)
pdf_dict_put_int(ctx, dp, PDF_NAME(Columns), cp->u.lzw.columns);
if (cp->u.lzw.colors)
pdf_dict_put_int(ctx, dp, PDF_NAME(Colors), cp->u.lzw.colors);
if (cp->u.lzw.predictor)
pdf_dict_put_int(ctx, dp, PDF_NAME(Predictor), cp->u.lzw.predictor);
if (cp->u.lzw.early_change)
pdf_dict_put_int(ctx, dp, PDF_NAME(EarlyChange), cp->u.lzw.early_change);
if (cp->u.lzw.bpc)
pdf_dict_put_int(ctx, dp, PDF_NAME(BitsPerComponent), cp->u.lzw.bpc);
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(LZWDecode));
break;
case FZ_IMAGE_RLD:
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(RunLengthDecode));
break;
}
if (!pdf_dict_len(ctx, dp))
pdf_dict_del(ctx, imobj, PDF_NAME(DecodeParms));
buffer = fz_keep_buffer(ctx, cbuffer->buffer);
if (image->use_decode)
{
pdf_obj *ary = pdf_dict_put_array(ctx, imobj, PDF_NAME(Decode), image->n * 2);
for (i = 0; i < image->n * 2; ++i)
pdf_array_push_real(ctx, ary, image->decode[i]);
}
}
else
{
unsigned int size;
int h;
unsigned char *d, *s;
raw_or_unknown_compression:
/* Currently, set to maintain resolution; should we consider
* subsampling here according to desired output res? */
pixmap = fz_get_pixmap_from_image(ctx, image, NULL, NULL, NULL, NULL);
n = pixmap->n - pixmap->alpha - pixmap->s; /* number of colorants */
if (n == 0)
n = 1; /* treat pixmaps with only alpha or spots as grayscale */
size = image->w * n;
h = image->h;
s = pixmap->samples;
d = fz_malloc(ctx, size * h);
buffer = fz_new_buffer_from_data(ctx, d, size * h);
if (n == pixmap->n)
{
/* If we use all channels, we can copy the data as is. */
while (h--)
{
memcpy(d, s, size);
d += size;
s += pixmap->stride;
}
}
else
{
/* Need to remove the alpha and spot planes. */
/* TODO: extract alpha plane to a soft mask. */
/* TODO: convert spots to colors. */
int line_skip = pixmap->stride - pixmap->w * pixmap->n;
int skip = pixmap->n - n;
while (h--)
{
int w = pixmap->w;
while (w--)
{
int k;
for (k = 0; k < n; ++k)
*d++ = *s++;
s += skip;
}
s += line_skip;
}
}
}
pdf_dict_put_int(ctx, imobj, PDF_NAME(Width), pixmap ? pixmap->w : image->w);
pdf_dict_put_int(ctx, imobj, PDF_NAME(Height), pixmap ? pixmap->h : image->h);
if (image->imagemask)
{
pdf_dict_put_bool(ctx, imobj, PDF_NAME(ImageMask), 1);
}
else
{
fz_colorspace *cs;
pdf_dict_put_int(ctx, imobj, PDF_NAME(BitsPerComponent), image->bpc);
cs = pixmap ? pixmap->colorspace : image->colorspace;
switch (fz_colorspace_type(ctx, cs))
{
case FZ_COLORSPACE_INDEXED:
{
fz_colorspace *basecs;
unsigned char *lookup = NULL;
int high = 0;
int basen;
pdf_obj *arr;
lookup = fz_indexed_colorspace_palette(ctx, cs, &high);
basecs = fz_colorspace_base(ctx, cs);
basen = fz_colorspace_n(ctx, basecs);
arr = pdf_dict_put_array(ctx, imobj, PDF_NAME(ColorSpace), 4);
pdf_array_push(ctx, arr, PDF_NAME(Indexed));
switch (fz_colorspace_type(ctx, basecs))
{
case FZ_COLORSPACE_GRAY:
pdf_array_push(ctx, arr, PDF_NAME(DeviceGray));
break;
case FZ_COLORSPACE_RGB:
pdf_array_push(ctx, arr, PDF_NAME(DeviceRGB));
break;
case FZ_COLORSPACE_CMYK:
pdf_array_push(ctx, arr, PDF_NAME(DeviceCMYK));
break;
default:
// TODO: convert to RGB!
fz_throw(ctx, FZ_ERROR_GENERIC, "only indexed Gray, RGB, and CMYK colorspaces supported");
break;
}
pdf_array_push_int(ctx, arr, high);
pdf_array_push_string(ctx, arr, (char *) lookup, basen * (high + 1));
}
break;
case FZ_COLORSPACE_NONE:
case FZ_COLORSPACE_GRAY:
pdf_dict_put(ctx, imobj, PDF_NAME(ColorSpace), PDF_NAME(DeviceGray));
break;
case FZ_COLORSPACE_RGB:
pdf_dict_put(ctx, imobj, PDF_NAME(ColorSpace), PDF_NAME(DeviceRGB));
break;
case FZ_COLORSPACE_CMYK:
pdf_dict_put(ctx, imobj, PDF_NAME(ColorSpace), PDF_NAME(DeviceCMYK));
break;
default:
// TODO: convert to RGB!
fz_throw(ctx, FZ_ERROR_GENERIC, "only Gray, RGB, and CMYK colorspaces supported");
break;
}
}
if (image->mask)
{
pdf_dict_put_drop(ctx, imobj, PDF_NAME(SMask), pdf_add_image(ctx, doc, image->mask));
}
pdf_update_stream(ctx, doc, imobj, buffer, 1);
/* Add ref to our image resource hash table. */
imref = pdf_insert_image_resource(ctx, doc, digest, imobj);
}
fz_always(ctx)
{
fz_drop_pixmap(ctx, pixmap);
fz_drop_buffer(ctx, buffer);
pdf_drop_obj(ctx, imobj);
}
fz_catch(ctx)
fz_rethrow(ctx);
return imref;
}
