1 /*
2 * Copyright 2013 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "SkPdfDiffEncoder.h"
9 #include "SkPdfNativeTokenizer.h"
10
11 #ifdef PDF_TRACE_DIFF_IN_PNG
12 #include "SkBitmap.h"
13 #include "SkBitmapDevice.h"
14 #include "SkCanvas.h"
15 #include "SkClipStack.h"
16 #include "SkColor.h"
17 #include "SkImageEncoder.h"
18 #include "SkPaint.h"
19 #include "SkPath.h"
20 #include "SkRegion.h"
21 #include "SkScalar.h"
22 #include "SkString.h"
23
24 extern "C" SkBitmap* gDumpBitmap;
25 extern "C" SkCanvas* gDumpCanvas;
26 SkBitmap* gDumpBitmap = NULL;
27 SkCanvas* gDumpCanvas = NULL;
28 static int gReadOp;
29 static int gOpCounter;
30 static SkString gLastKeyword;
31 #endif // PDF_TRACE_DIFF_IN_PNG
32
WriteToFile(PdfToken * token)33 void SkPdfDiffEncoder::WriteToFile(PdfToken* token) {
34 #ifdef PDF_TRACE_DIFF_IN_PNG
35 gReadOp++;
36 gOpCounter++;
37
38 // Only attempt to write if the dump bitmap and canvas are non NULL. They are set by
39 // pdf_viewer_main.cpp
40 if (NULL == gDumpBitmap || NULL == gDumpCanvas) {
41 return;
42 }
43
44 // TODO(edisonn): this code is used to make a step by step history of all the draw operations
45 // so we could find the step where something is wrong.
46 if (!gLastKeyword.isEmpty()) {
47 gDumpCanvas->flush();
48
49 // Copy the existing drawing. Then we will draw the difference caused by this command,
50 // highlighted with a blue border.
51 SkBitmap bitmap;
52 if (gDumpBitmap->copyTo(&bitmap, SkBitmap::kARGB_8888_Config)) {
53
54 SkAutoTUnref<SkBaseDevice> device(SkNEW_ARGS(SkBitmapDevice, (bitmap)));
55 SkCanvas canvas(device);
56
57 // draw context stuff here
58 SkPaint blueBorder;
59 blueBorder.setColor(SK_ColorBLUE);
60 blueBorder.setStyle(SkPaint::kStroke_Style);
61 blueBorder.setTextSize(SkDoubleToScalar(20));
62
63 SkString str;
64
65 const SkClipStack* clipStack = gDumpCanvas->getClipStack();
66 if (clipStack) {
67 SkClipStack::Iter iter(*clipStack, SkClipStack::Iter::kBottom_IterStart);
68 const SkClipStack::Element* elem;
69 double y = 0;
70 int total = 0;
71 while ((elem = iter.next()) != NULL) {
72 total++;
73 y += 30;
74
75 switch (elem->getType()) {
76 case SkClipStack::Element::kRect_Type:
77 canvas.drawRect(elem->getRect(), blueBorder);
78 canvas.drawText("Rect Clip", strlen("Rect Clip"),
79 SkDoubleToScalar(10), SkDoubleToScalar(y), blueBorder);
80 break;
81 case SkClipStack::Element::kPath_Type:
82 canvas.drawPath(elem->getPath(), blueBorder);
83 canvas.drawText("Path Clip", strlen("Path Clip"),
84 SkDoubleToScalar(10), SkDoubleToScalar(y), blueBorder);
85 break;
86 case SkClipStack::Element::kEmpty_Type:
87 canvas.drawText("Empty Clip!!!", strlen("Empty Clip!!!"),
88 SkDoubleToScalar(10), SkDoubleToScalar(y), blueBorder);
89 break;
90 default:
91 canvas.drawText("Unknown Clip!!!", strlen("Unknown Clip!!!"),
92 SkDoubleToScalar(10), SkDoubleToScalar(y), blueBorder);
93 break;
94 }
95 }
96
97 y += 30;
98 str.printf("Number of clips in stack: %i", total);
99 canvas.drawText(str.c_str(), str.size(),
100 SkDoubleToScalar(10), SkDoubleToScalar(y), blueBorder);
101 }
102
103 const SkRegion& clipRegion = gDumpCanvas->getTotalClip();
104 SkPath clipPath;
105 if (clipRegion.getBoundaryPath(&clipPath)) {
106 SkPaint redBorder;
107 redBorder.setColor(SK_ColorRED);
108 redBorder.setStyle(SkPaint::kStroke_Style);
109 canvas.drawPath(clipPath, redBorder);
110 }
111
112 canvas.flush();
113
114 SkString out;
115
116 // TODO(edisonn): overlay on top of image inf about the clip , grafic state, the stack
117
118 out.appendf("/tmp/log_step_by_step/step-%i-%s.png", gOpCounter, gLastKeyword.c_str());
119
120 SkImageEncoder::EncodeFile(out.c_str(), bitmap, SkImageEncoder::kPNG_Type, 100);
121 }
122 }
123
124 if (token->fType == kKeyword_TokenType && token->fKeyword && token->fKeywordLength > 0) {
125 gLastKeyword.set(token->fKeyword, token->fKeywordLength);
126 } else {
127 gLastKeyword.reset();
128 }
129 #endif
130 }
131