filtermain.cpp revision d686ac77c2c485c4a3302eda9c1de597a6f8c568 
1/*
2 * Copyright 2012 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 "SkDebugCanvas.h"
9#include "SkDevice.h"
10#include "SkGraphics.h"
11#include "SkImageDecoder.h"
12#include "SkImageEncoder.h"
13#include "SkOSFile.h"
14#include "SkPicture.h"
15#include "SkPicturePlayback.h"
16#include "SkPictureRecord.h"
17#include "SkStream.h"
18#include "picture_utils.h"
19#include "path_utils.h"
20
21static void usage() {
22    SkDebugf("Usage: filter -i inFile [-o outFile] [--input-dir path] [--output-dir path]\n");
23    SkDebugf("                        [-h|--help]\n\n");
24    SkDebugf("    -i inFile  : file to file.\n");
25    SkDebugf("    -o outFile : result of filtering.\n");
26    SkDebugf("    --input-dir : process all files in dir with .skp extension.\n");
27    SkDebugf("    --output-dir : results of filtering the input dir.\n");
28    SkDebugf("    -h|--help  : Show this help message.\n");
29}
30
31// Is the supplied paint simply a color?
32static bool is_simple(const SkPaint& p) {
33    return NULL == p.getPathEffect() &&
34           NULL == p.getShader() &&
35           NULL == p.getXfermode() &&
36           NULL == p.getMaskFilter() &&
37           NULL == p.getColorFilter() &&
38           NULL == p.getRasterizer() &&
39           NULL == p.getLooper() &&
40           NULL == p.getImageFilter();
41}
42
43static int filter_picture(const SkString& inFile, const SkString& outFile) {
44    SkPicture* inPicture = NULL;
45
46    SkFILEStream inStream(inFile.c_str());
47    if (inStream.isValid()) {
48        inPicture = SkNEW_ARGS(SkPicture, (&inStream, NULL, &SkImageDecoder::DecodeStream));
49    }
50
51    if (NULL == inPicture) {
52        SkDebugf("Could not read file %s\n", inFile.c_str());
53        return -1;
54    }
55
56    SkDebugCanvas debugCanvas(inPicture->width(), inPicture->height());
57    debugCanvas.setBounds(inPicture->width(), inPicture->height());
58    inPicture->draw(&debugCanvas);
59
60    const SkTDArray<SkDrawCommand*>& commands = debugCanvas.getDrawCommands();
61
62    for (int i = 0; i < commands.count(); ++i) {
63        // Check for:
64        //    SAVE_LAYER
65        //      DRAW_BITMAP_RECT_TO_RECT
66        //    RESTORE
67        // where the saveLayer's color can be moved into the drawBitmapRect
68        if (SAVE_LAYER == commands[i]->getType() && commands.count() > i+2) {
69            if (DRAW_BITMAP_RECT_TO_RECT == commands[i+1]->getType() &&
70                RESTORE == commands[i+2]->getType()) {
71                SaveLayer* sl = (SaveLayer*) commands[i];
72                DrawBitmapRect* dbmr = (DrawBitmapRect*) commands[i+1];
73
74                const SkPaint* p0 = sl->paint();
75                SkPaint* p1 = dbmr->paint();
76
77                if (NULL == p0) {
78                    commands[i]->setVisible(false);
79                    commands[i+2]->setVisible(false);
80                } else if (NULL == p1) {
81                    commands[i]->setVisible(false);
82                    dbmr->setPaint(*p0);
83                    commands[i+2]->setVisible(false);
84                } else if (is_simple(*p0) &&
85                           (SkColorGetR(p0->getColor()) == SkColorGetR(p1->getColor())) &&
86                           (SkColorGetG(p0->getColor()) == SkColorGetG(p1->getColor())) &&
87                           (SkColorGetB(p0->getColor()) == SkColorGetB(p1->getColor()))) {
88                    commands[i]->setVisible(false);
89                    SkColor newColor = SkColorSetA(p1->getColor(),
90                                                   SkColorGetA(p0->getColor()));
91                    p1->setColor(newColor);
92                    commands[i+2]->setVisible(false);
93                }
94            }
95        }
96    }
97
98    if (!outFile.isEmpty()) {
99        SkPicture outPicture;
100
101        SkCanvas* canvas = outPicture.beginRecording(inPicture->width(), inPicture->height());
102        debugCanvas.draw(canvas);
103        outPicture.endRecording();
104
105        SkFILEWStream outStream(outFile.c_str());
106
107        outPicture.serialize(&outStream);
108    }
109
110    return 0;
111}
112
113// This function is not marked as 'static' so it can be referenced externally
114// in the iOS build.
115int tool_main(int argc, char** argv); // suppress a warning on mac
116
117int tool_main(int argc, char** argv) {
118    SkGraphics::Init();
119
120    if (argc < 3) {
121        usage();
122        return -1;
123    }
124
125    SkString inFile, outFile, inDir, outDir;
126
127    char* const* stop = argv + argc;
128    for (++argv; argv < stop; ++argv) {
129        if (strcmp(*argv, "-i") == 0) {
130            argv++;
131            if (argv < stop && **argv) {
132                inFile.set(*argv);
133            } else {
134                SkDebugf("missing arg for -i\n");
135                usage();
136                return -1;
137            }
138        } else if (strcmp(*argv, "--input-dir") == 0) {
139            argv++;
140            if (argv < stop && **argv) {
141                inDir.set(*argv);
142            } else {
143                SkDebugf("missing arg for --input-dir\n");
144                usage();
145                return -1;
146            }
147        } else if (strcmp(*argv, "--output-dir") == 0) {
148            argv++;
149            if (argv < stop && **argv) {
150                outDir.set(*argv);
151            } else {
152                SkDebugf("missing arg for --output-dir\n");
153                usage();
154                return -1;
155            }
156        } else if (strcmp(*argv, "-o") == 0) {
157            argv++;
158            if (argv < stop && **argv) {
159                outFile.set(*argv);
160            } else {
161                SkDebugf("missing arg for -o\n");
162                usage();
163                return -1;
164            }
165        } else if (strcmp(*argv, "--help") == 0 || strcmp(*argv, "-h") == 0) {
166            usage();
167            return 0;
168        } else {
169            SkDebugf("unknown arg %s\n", *argv);
170            usage();
171            return -1;
172        }
173    }
174
175    SkOSFile::Iter iter(inDir.c_str(), "skp");
176
177    SkString inputFilename, outputFilename;
178    if (iter.next(&inputFilename)) {
179
180        do {
181            sk_tools::make_filepath(&inFile, inDir, inputFilename);
182            if (!outDir.isEmpty()) {
183                sk_tools::make_filepath(&outFile, outDir, inputFilename);
184            }
185            SkDebugf("Executing %s\n", inputFilename.c_str());
186            filter_picture(inFile, outFile);
187        } while(iter.next(&inputFilename));
188
189    } else if (!inFile.isEmpty()) {
190        filter_picture(inFile, outFile);
191    } else {
192        usage();
193        return -1;
194    }
195
196    SkGraphics::Term();
197    return 0;
198}
199
200#if !defined SK_BUILD_FOR_IOS
201int main(int argc, char * const argv[]) {
202    return tool_main(argc, (char**) argv);
203}
204#endif
205