static void
fz_test_fill_image(fz_context *ctx, fz_device *dev_, fz_image *image, fz_matrix ctm, float alpha, const fz_color_params *color_params)
{
fz_test_device *dev = (fz_test_device*)dev_;
while (dev->resolved == 0) /* So we can break out */
{
fz_compressed_buffer *buffer;
if (*dev->is_color || !image->colorspace || fz_colorspace_is_gray(ctx, image->colorspace))
break;
if ((dev->options & FZ_TEST_OPT_IMAGES) == 0)
{
/* Don't test every pixel. Upgrade us from "black and white" to "probably color" */
if (*dev->is_color == 0)
*dev->is_color = 1;
dev->resolved = 1;
if (dev->passthrough == NULL)
fz_throw(ctx, FZ_ERROR_ABORT, "Page found as color; stopping interpretation");
break;
}
buffer = fz_compressed_image_buffer(ctx, image);
if (buffer && image->bpc == 8)
{
fz_stream *stream = fz_open_compressed_buffer(ctx, buffer);
fz_try(ctx)
fz_test_fill_compressed_8bpc_image(ctx, dev, image, stream, color_params);
fz_always(ctx)
fz_drop_stream(ctx, stream);
fz_catch(ctx)
fz_rethrow(ctx);
}
else
{
fz_pixmap *pix = fz_get_pixmap_from_image(ctx, image, NULL, NULL, 0, 0);
if (pix == NULL) /* Should never happen really, but... */
break;
fz_try(ctx)
fz_test_fill_other_image(ctx, dev, pix, color_params);
fz_always(ctx)
fz_drop_pixmap(ctx, pix);
fz_catch(ctx)
fz_rethrow(ctx);
}
break;
}
if (dev->passthrough)
fz_fill_image(ctx, dev->passthrough, image, ctm, alpha, color_params);
}
static void
fz_test_fill_image(fz_context *ctx, fz_device *dev_, fz_image *image, const fz_matrix *ctm, float alpha, const fz_color_params *color_params)
{
fz_test_device *dev = (fz_test_device*)dev_;
while (dev->resolved == 0) /* So we can break out */
{
fz_pixmap *pix;
unsigned int count, i, k, h, sa, ss;
unsigned char *s;
fz_compressed_buffer *buffer;
if (*dev->is_color || !image->colorspace || fz_colorspace_is_gray(ctx, image->colorspace))
break;
if ((dev->options & FZ_TEST_OPT_IMAGES) == 0)
{
/* Don't test every pixel. Upgrade us from "black and white" to "probably color" */
if (*dev->is_color == 0)
*dev->is_color = 1;
dev->resolved = 1;
if (dev->passthrough == NULL)
fz_throw(ctx, FZ_ERROR_ABORT, "Page found as color; stopping interpretation");
break;
}
buffer = fz_compressed_image_buffer(ctx, image);
if (buffer && image->bpc == 8)
{
fz_stream *stream = fz_open_compressed_buffer(ctx, buffer);
count = (unsigned int)image->w * (unsigned int)image->h;
if (image->colorspace == fz_device_rgb(ctx))
{
int threshold_u8 = dev->threshold * 255;
for (i = 0; i < count; i++)
{
int r = fz_read_byte(ctx, stream);
int g = fz_read_byte(ctx, stream);
int b = fz_read_byte(ctx, stream);
if (is_rgb_color_u8(threshold_u8, r, g, b))
{
*dev->is_color = 1;
dev->resolved = 1;
fz_drop_stream(ctx, stream);
if (dev->passthrough == NULL)
fz_throw(ctx, FZ_ERROR_ABORT, "Page found as color; stopping interpretation");
break;
}
}
}
else
{
fz_color_converter cc;
unsigned int n = (unsigned int)image->n;
fz_init_cached_color_converter(ctx, &cc, NULL, fz_device_rgb(ctx), image->colorspace, color_params);
fz_try(ctx)
{
for (i = 0; i < count; i++)
{
float cs[FZ_MAX_COLORS];
float ds[FZ_MAX_COLORS];
for (k = 0; k < n; k++)
cs[k] = fz_read_byte(ctx, stream) / 255.0f;
cc.convert(ctx, &cc, ds, cs);
if (is_rgb_color(dev->threshold, ds[0], ds[1], ds[2]))
{
*dev->is_color = 1;
dev->resolved = 1;
if (dev->passthrough == NULL)
{
fz_drop_stream(ctx, stream);
fz_fin_cached_color_converter(ctx, &cc);
fz_throw(ctx, FZ_ERROR_ABORT, "Page found as color; stopping interpretation");
}
break;
}
}
}
fz_always(ctx)
fz_fin_cached_color_converter(ctx, &cc);
fz_catch(ctx)
fz_rethrow(ctx);
}
fz_drop_stream(ctx, stream);
break;
}
pix = fz_get_pixmap_from_image(ctx, image, NULL, NULL, 0, 0);
if (pix == NULL) /* Should never happen really, but... */
break;
count = pix->w;
h = pix->h;
s = pix->samples;
sa = pix->alpha;
ss = pix->stride - pix->w * pix->n;
if (pix->colorspace == fz_device_rgb(ctx))
{
int threshold_u8 = dev->threshold * 255;
while (h--)
{
for (i = 0; i < count; i++)
{
if ((!sa || s[3] != 0) && is_rgb_color_u8(threshold_u8, s[0], s[1], s[2]))
{
*dev->is_color = 1;
dev->resolved = 1;
if (dev->passthrough == NULL)
{
fz_drop_pixmap(ctx, pix);
fz_throw(ctx, FZ_ERROR_ABORT, "Page found as color; stopping interpretation");
}
break;
}
s += 3 + sa;
}
s += ss;
}
}
else
{
fz_color_converter cc;
unsigned int n = (unsigned int)pix->n-1;
fz_init_cached_color_converter(ctx, &cc, NULL, fz_device_rgb(ctx), pix->colorspace, color_params);
fz_try(ctx)
{
while (h--)
{
for (i = 0; i < count; i++)
{
float cs[FZ_MAX_COLORS];
float ds[FZ_MAX_COLORS];
for (k = 0; k < n; k++)
cs[k] = (*s++) / 255.0f;
if (sa && *s++ == 0)
continue;
cc.convert(ctx, &cc, ds, cs);
if (is_rgb_color(dev->threshold, ds[0], ds[1], ds[2]))
{
*dev->is_color = 1;
dev->resolved = 1;
if (dev->passthrough == NULL)
{
fz_fin_cached_color_converter(ctx, &cc);
fz_drop_pixmap(ctx, pix);
fz_throw(ctx, FZ_ERROR_ABORT, "Page found as color; stopping interpretation");
}
break;
}
}
s += ss;
}
}
fz_always(ctx)
fz_fin_cached_color_converter(ctx, &cc);
fz_catch(ctx)
fz_rethrow(ctx);
}
fz_drop_pixmap(ctx, pix);
break;
}
