From ddd00f62888c908c84932c2a92a0c2d195b26c36 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor.andersson@artifex.com>
Date: Wed, 10 Oct 2018 16:48:00 +0200
Subject: Add fz_write_pixmap_as_data_uri helper function.

Also include "data:" schema in the data uri for fz_write_image_as_data_uri.
---
 include/mupdf/fitz/util.h  |  1 +
 source/fitz/stext-output.c |  4 ++--
 source/fitz/svg-device.c   | 13 ++++---------
 source/fitz/util.c         | 21 ++++++++++++++++++---
 4 files changed, 25 insertions(+), 14 deletions(-)

diff --git a/include/mupdf/fitz/util.h b/include/mupdf/fitz/util.h
index 87595017..4f60aae7 100644
--- a/include/mupdf/fitz/util.h
+++ b/include/mupdf/fitz/util.h
@@ -74,5 +74,6 @@ fz_image *fz_new_image_from_svg(fz_context *ctx, fz_buffer *buf);
 	Write image as a data URI (for HTML and SVG output).
 */
 void fz_write_image_as_data_uri(fz_context *ctx, fz_output *out, fz_image *image);
+void fz_write_pixmap_as_data_uri(fz_context *ctx, fz_output *out, fz_pixmap *pixmap);
 
 #endif
diff --git a/source/fitz/stext-output.c b/source/fitz/stext-output.c
index f60ce993..428cb7ab 100644
--- a/source/fitz/stext-output.c
+++ b/source/fitz/stext-output.c
@@ -80,7 +80,7 @@ fz_print_stext_image_as_html(fz_context *ctx, fz_output *out, fz_stext_block *bl
 	int w = block->bbox.x1 - block->bbox.x0;
 	int h = block->bbox.y1 - block->bbox.y0;
 
-	fz_write_printf(ctx, out, "<img style=\"position:absolute;top:%dpt;left:%dpt;width:%dpt;height:%dpt\" src=\"data:", y, x, w, h);
+	fz_write_printf(ctx, out, "<img style=\"position:absolute;top:%dpt;left:%dpt;width:%dpt;height:%dpt\" src=\"", y, x, w, h);
 	fz_write_image_as_data_uri(ctx, out, block->u.i.image);
 	fz_write_string(ctx, out, "\">\n");
 }
@@ -190,7 +190,7 @@ fz_print_stext_image_as_xhtml(fz_context *ctx, fz_output *out, fz_stext_block *b
 	int w = block->bbox.x1 - block->bbox.x0;
 	int h = block->bbox.y1 - block->bbox.y0;
 
-	fz_write_printf(ctx, out, "<p><img width=\"%d\" height=\"%d\" src=\"data:", w, h);
+	fz_write_printf(ctx, out, "<p><img width=\"%d\" height=\"%d\" src=\"", w, h);
 	fz_write_image_as_data_uri(ctx, out, block->u.i.image);
 	fz_write_string(ctx, out, "\"/></p>\n");
 }
diff --git a/source/fitz/svg-device.c b/source/fitz/svg-device.c
index 7d2c7ee3..2876a89b 100644
--- a/source/fitz/svg-device.c
+++ b/source/fitz/svg-device.c
@@ -855,7 +855,7 @@ svg_send_image(fz_context *ctx, svg_device *sdev, fz_image *img, const fz_color_
 		out = start_def(ctx, sdev);
 		fz_write_printf(ctx, out, "<symbol id=\"im%d\" viewBox=\"0 0 %d %d\">\n", id, img->w, img->h);
 
-		fz_write_printf(ctx, out, "<image width=\"%d\" height=\"%d\" xlink:href=\"data:", img->w, img->h);
+		fz_write_printf(ctx, out, "<image width=\"%d\" height=\"%d\" xlink:href=\"", img->w, img->h);
 		fz_write_image_as_data_uri(ctx, out, img);
 		fz_write_printf(ctx, out, "\"/>\n");
 
@@ -871,7 +871,7 @@ svg_send_image(fz_context *ctx, svg_device *sdev, fz_image *img, const fz_color_
 	}
 	else
 	{
-		fz_write_printf(ctx, out, "<image width=\"%d\" height=\"%d\" xlink:href=\"data:", img->w, img->h);
+		fz_write_printf(ctx, out, "<image width=\"%d\" height=\"%d\" xlink:href=\"", img->w, img->h);
 		fz_write_image_as_data_uri(ctx, out, img);
 		fz_write_printf(ctx, out, "\"/>\n");
 	}
@@ -906,9 +906,6 @@ svg_dev_fill_shade(fz_context *ctx, fz_device *dev, fz_shade *shade, fz_matrix c
 	fz_output *out = sdev->out;
 	fz_irect bbox;
 	fz_pixmap *pix;
-	fz_buffer *buf = NULL;
-
-	fz_var(buf);
 
 	if (dev->container_len == 0)
 		return;
@@ -922,18 +919,16 @@ svg_dev_fill_shade(fz_context *ctx, fz_device *dev, fz_shade *shade, fz_matrix c
 	fz_try(ctx)
 	{
 		fz_paint_shade(ctx, shade, NULL, ctm, pix, color_params, bbox, NULL);
-		buf = fz_new_buffer_from_pixmap_as_png(ctx, pix, color_params);
 		if (alpha != 1.0f)
 			fz_write_printf(ctx, out, "<g opacity=\"%g\">\n", alpha);
-		fz_write_printf(ctx, out, "<image x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" xlink:href=\"data:image/png;base64,", pix->x, pix->y, pix->w, pix->h);
-		fz_write_base64_buffer(ctx, out, buf, 1);
+		fz_write_printf(ctx, out, "<image x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" xlink:href=\"", pix->x, pix->y, pix->w, pix->h);
+		fz_write_pixmap_as_data_uri(ctx, out, pix);
 		fz_write_printf(ctx, out, "\"/>\n");
 		if (alpha != 1.0f)
 			fz_write_printf(ctx, out, "</g>\n");
 	}
 	fz_always(ctx)
 	{
-		fz_drop_buffer(ctx, buf);
 		fz_drop_pixmap(ctx, pix);
 	}
 	fz_catch(ctx)
diff --git a/source/fitz/util.c b/source/fitz/util.c
index d78a2981..e89cb419 100644
--- a/source/fitz/util.c
+++ b/source/fitz/util.c
@@ -527,14 +527,14 @@ fz_write_image_as_data_uri(fz_context *ctx, fz_output *out, fz_image *image)
 		int type = fz_colorspace_type(ctx, image->colorspace);
 		if (type == FZ_COLORSPACE_GRAY || type == FZ_COLORSPACE_RGB)
 		{
-			fz_write_string(ctx, out, "image/jpeg;base64,");
+			fz_write_string(ctx, out, "data:image/jpeg;base64,");
 			fz_write_base64_buffer(ctx, out, cbuf->buffer, 1);
 			return;
 		}
 	}
 	if (cbuf && cbuf->params.type == FZ_IMAGE_PNG)
 	{
-		fz_write_string(ctx, out, "image/png;base64,");
+		fz_write_string(ctx, out, "data:image/png;base64,");
 		fz_write_base64_buffer(ctx, out, cbuf->buffer, 1);
 		return;
 	}
@@ -542,7 +542,22 @@ fz_write_image_as_data_uri(fz_context *ctx, fz_output *out, fz_image *image)
 	buf = fz_new_buffer_from_image_as_png(ctx, image, NULL);
 	fz_try(ctx)
 	{
-		fz_write_string(ctx, out, "image/png;base64,");
+		fz_write_string(ctx, out, "data:image/png;base64,");
+		fz_write_base64_buffer(ctx, out, buf, 1);
+	}
+	fz_always(ctx)
+		fz_drop_buffer(ctx, buf);
+	fz_catch(ctx)
+		fz_rethrow(ctx);
+}
+
+void
+fz_write_pixmap_as_data_uri(fz_context *ctx, fz_output *out, fz_pixmap *pixmap)
+{
+	fz_buffer *buf = fz_new_buffer_from_pixmap_as_png(ctx, pixmap, NULL);
+	fz_try(ctx)
+	{
+		fz_write_string(ctx, out, "data:image/png;base64,");
 		fz_write_base64_buffer(ctx, out, buf, 1);
 	}
 	fz_always(ctx)
-- 
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