1 // Copyright 2017 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "core/fxge/dib/cfx_imagerenderer.h"
8
9 #include <memory>
10
11 #include "core/fxge/cfx_cliprgn.h"
12 #include "core/fxge/dib/cfx_dibitmap.h"
13 #include "core/fxge/dib/cfx_imagestretcher.h"
14 #include "core/fxge/dib/cfx_imagetransformer.h"
15 #include "third_party/base/ptr_util.h"
16
CFX_ImageRenderer(const RetainPtr<CFX_DIBitmap> & pDevice,const CFX_ClipRgn * pClipRgn,const RetainPtr<CFX_DIBBase> & pSource,int bitmap_alpha,uint32_t mask_color,const CFX_Matrix & matrix,const FXDIB_ResampleOptions & options,bool bRgbByteOrder)17 CFX_ImageRenderer::CFX_ImageRenderer(const RetainPtr<CFX_DIBitmap>& pDevice,
18 const CFX_ClipRgn* pClipRgn,
19 const RetainPtr<CFX_DIBBase>& pSource,
20 int bitmap_alpha,
21 uint32_t mask_color,
22 const CFX_Matrix& matrix,
23 const FXDIB_ResampleOptions& options,
24 bool bRgbByteOrder)
25 : m_pDevice(pDevice),
26 m_pClipRgn(pClipRgn),
27 m_Matrix(matrix),
28 m_BitmapAlpha(bitmap_alpha),
29 m_MaskColor(mask_color),
30 m_bRgbByteOrder(bRgbByteOrder) {
31 FX_RECT image_rect = m_Matrix.GetUnitRect().GetOuterRect();
32 m_ClipBox = pClipRgn
33 ? pClipRgn->GetBox()
34 : FX_RECT(0, 0, pDevice->GetWidth(), pDevice->GetHeight());
35 m_ClipBox.Intersect(image_rect);
36 if (m_ClipBox.IsEmpty())
37 return;
38
39 if ((fabs(m_Matrix.b) >= 0.5f || m_Matrix.a == 0) ||
40 (fabs(m_Matrix.c) >= 0.5f || m_Matrix.d == 0)) {
41 if (fabs(m_Matrix.a) < fabs(m_Matrix.b) / 20 &&
42 fabs(m_Matrix.d) < fabs(m_Matrix.c) / 20 && fabs(m_Matrix.a) < 0.5f &&
43 fabs(m_Matrix.d) < 0.5f) {
44 int dest_width = image_rect.Width();
45 int dest_height = image_rect.Height();
46 FX_RECT bitmap_clip = m_ClipBox;
47 bitmap_clip.Offset(-image_rect.left, -image_rect.top);
48 bitmap_clip = FXDIB_SwapClipBox(bitmap_clip, dest_width, dest_height,
49 m_Matrix.c > 0, m_Matrix.b < 0);
50 m_Composer.Compose(pDevice, pClipRgn, bitmap_alpha, mask_color, m_ClipBox,
51 true, m_Matrix.c > 0, m_Matrix.b < 0, m_bRgbByteOrder,
52 BlendMode::kNormal);
53 m_Stretcher = pdfium::MakeUnique<CFX_ImageStretcher>(
54 &m_Composer, pSource, dest_height, dest_width, bitmap_clip, options);
55 if (m_Stretcher->Start())
56 m_Status = 1;
57 return;
58 }
59 m_Status = 2;
60 m_pTransformer = pdfium::MakeUnique<CFX_ImageTransformer>(
61 pSource, m_Matrix, options, &m_ClipBox);
62 return;
63 }
64
65 int dest_width = image_rect.Width();
66 if (m_Matrix.a < 0)
67 dest_width = -dest_width;
68
69 int dest_height = image_rect.Height();
70 if (m_Matrix.d > 0)
71 dest_height = -dest_height;
72
73 if (dest_width == 0 || dest_height == 0)
74 return;
75
76 FX_RECT bitmap_clip = m_ClipBox;
77 bitmap_clip.Offset(-image_rect.left, -image_rect.top);
78 m_Composer.Compose(pDevice, pClipRgn, bitmap_alpha, mask_color, m_ClipBox,
79 false, false, false, m_bRgbByteOrder, BlendMode::kNormal);
80 m_Status = 1;
81 m_Stretcher = pdfium::MakeUnique<CFX_ImageStretcher>(
82 &m_Composer, pSource, dest_width, dest_height, bitmap_clip, options);
83 m_Stretcher->Start();
84 }
85
~CFX_ImageRenderer()86 CFX_ImageRenderer::~CFX_ImageRenderer() {}
87
Continue(PauseIndicatorIface * pPause)88 bool CFX_ImageRenderer::Continue(PauseIndicatorIface* pPause) {
89 if (m_Status == 1)
90 return m_Stretcher->Continue(pPause);
91 if (m_Status != 2)
92 return false;
93 if (m_pTransformer->Continue(pPause))
94 return true;
95
96 RetainPtr<CFX_DIBitmap> pBitmap = m_pTransformer->DetachBitmap();
97 if (!pBitmap || !pBitmap->GetBuffer())
98 return false;
99
100 if (pBitmap->IsAlphaMask()) {
101 if (m_BitmapAlpha != 255)
102 m_MaskColor = FXARGB_MUL_ALPHA(m_MaskColor, m_BitmapAlpha);
103 m_pDevice->CompositeMask(
104 m_pTransformer->result().left, m_pTransformer->result().top,
105 pBitmap->GetWidth(), pBitmap->GetHeight(), pBitmap, m_MaskColor, 0, 0,
106 BlendMode::kNormal, m_pClipRgn.Get(), m_bRgbByteOrder);
107 } else {
108 if (m_BitmapAlpha != 255)
109 pBitmap->MultiplyAlpha(m_BitmapAlpha);
110 m_pDevice->CompositeBitmap(
111 m_pTransformer->result().left, m_pTransformer->result().top,
112 pBitmap->GetWidth(), pBitmap->GetHeight(), pBitmap, 0, 0,
113 BlendMode::kNormal, m_pClipRgn.Get(), m_bRgbByteOrder);
114 }
115 return false;
116 }
117