1 /*
2 * Copyright (C) 2025 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "image_object.h"
18
19 #include <stddef.h>
20 #include <stdint.h>
21
22 #include "fpdf_edit.h"
23 #include "logging.h"
24
25 #define LOG_TAG "image_object"
26
27 namespace pdfClient {
28
GetBitmapFormat(int bitmap_format)29 BitmapFormat GetBitmapFormat(int bitmap_format) {
30 switch (bitmap_format) {
31 case FPDFBitmap_BGR: {
32 return BitmapFormat::BGR;
33 }
34 case FPDFBitmap_BGRA: {
35 return BitmapFormat::BGRA;
36 }
37 case FPDFBitmap_BGRx: {
38 return BitmapFormat::BGRx;
39 }
40 default: {
41 return BitmapFormat::Unknown;
42 }
43 }
44 }
45
ImageObject()46 ImageObject::ImageObject() : PageObject(Type::Image) {}
47
CreateFPDFInstance(FPDF_DOCUMENT document,FPDF_PAGE page)48 ScopedFPDFPageObject ImageObject::CreateFPDFInstance(FPDF_DOCUMENT document, FPDF_PAGE page) {
49 // Create a scoped PDFium image object.
50 ScopedFPDFPageObject scoped_image_object(FPDFPageObj_NewImageObj(document));
51 if (!scoped_image_object) {
52 return nullptr;
53 }
54 // Update attributes of PDFium image object.
55 if (!UpdateFPDFInstance(scoped_image_object.get(), page)) {
56 return nullptr;
57 }
58 return scoped_image_object;
59 }
60
UpdateFPDFInstance(FPDF_PAGEOBJECT image_object,FPDF_PAGE page)61 bool ImageObject::UpdateFPDFInstance(FPDF_PAGEOBJECT image_object, FPDF_PAGE page) {
62 if (!image_object) {
63 return false;
64 }
65
66 // Check for Type Correctness.
67 if (FPDFPageObj_GetType(image_object) != FPDF_PAGEOBJ_IMAGE) {
68 return false;
69 }
70
71 // Set the updated bitmap.
72 if (!FPDFImageObj_SetBitmap(nullptr, 0, image_object, bitmap_.get())) {
73 return false;
74 }
75
76 // Set the updated matrix.
77 if (!SetDeviceToPageMatrix(image_object, page)) {
78 return false;
79 }
80
81 // Set the updated dimensions.
82 width_ = FPDFBitmap_GetWidth(bitmap_.get());
83 height_ = FPDFBitmap_GetHeight(bitmap_.get());
84
85 // Set the updated bitmap format.
86 bitmap_format_ = GetBitmapFormat(FPDFBitmap_GetFormat(bitmap_.get()));
87
88 return true;
89 }
90
PopulateFromFPDFInstance(FPDF_PAGEOBJECT image_object,FPDF_PAGE page)91 bool ImageObject::PopulateFromFPDFInstance(FPDF_PAGEOBJECT image_object, FPDF_PAGE page) {
92 // Get bitmap.
93 bitmap_ = ScopedFPDFBitmap(FPDFImageObj_GetBitmap(image_object));
94 if (bitmap_.get() == nullptr) {
95 return false;
96 }
97
98 // Get matrix.
99 if (!GetPageToDeviceMatrix(image_object, page)) {
100 return false;
101 }
102
103 // Get dimensions.
104 width_ = FPDFBitmap_GetWidth(bitmap_.get());
105 height_ = FPDFBitmap_GetHeight(bitmap_.get());
106
107 // Get bitmap format.
108 bitmap_format_ = GetBitmapFormat(FPDFBitmap_GetFormat(bitmap_.get()));
109 if (bitmap_format_ == BitmapFormat::Unknown) {
110 LOGE("Bitmap format unknown");
111 return false;
112 }
113 return true;
114 }
115
GetBitmapBuffer() const116 void* ImageObject::GetBitmapBuffer() const {
117 return FPDFBitmap_GetBuffer(bitmap_.get());
118 }
119
120 ImageObject::~ImageObject() = default;
121
122 } // namespace pdfClient