summaryrefslogtreecommitdiff
path: root/xfa/fxfa/cxfa_imagerenderer.cpp
blob: dfa45f07d792e1604ef2521594280554fe7cc6d7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
// Copyright 2018 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#include "xfa/fxfa/cxfa_imagerenderer.h"

#include "core/fxge/cfx_renderdevice.h"
#include "core/fxge/dib/cfx_dibsource.h"
#include "core/fxge/dib/cfx_imagerenderer.h"
#include "core/fxge/dib/cfx_imagetransformer.h"
#include "third_party/base/ptr_util.h"

CXFA_ImageRenderer::CXFA_ImageRenderer(
    CFX_RenderDevice* pDevice,
    const RetainPtr<CFX_DIBSource>& pDIBSource,
    const CFX_Matrix* pImage2Device,
    uint32_t flags)
    : m_pDevice(pDevice),
      m_ImageMatrix(*pImage2Device),
      m_pDIBSource(pDIBSource),
      m_Flags(flags) {}

CXFA_ImageRenderer::~CXFA_ImageRenderer() {}

bool CXFA_ImageRenderer::Start() {
  if (m_pDevice->StartDIBitsWithBlend(m_pDIBSource, 255, 0, &m_ImageMatrix,
                                      m_Flags, &m_DeviceHandle,
                                      FXDIB_BLEND_NORMAL)) {
    if (m_DeviceHandle) {
      m_Status = 3;
      return true;
    }
    return false;
  }
  CFX_FloatRect image_rect_f = m_ImageMatrix.GetUnitRect();
  FX_RECT image_rect = image_rect_f.GetOuterRect();
  int dest_width = image_rect.Width();
  int dest_height = image_rect.Height();
  if ((fabs(m_ImageMatrix.b) >= 0.5f || m_ImageMatrix.a == 0) ||
      (fabs(m_ImageMatrix.c) >= 0.5f || m_ImageMatrix.d == 0)) {
    RetainPtr<CFX_DIBSource> pDib = m_pDIBSource;
    if (m_pDIBSource->HasAlpha() &&
        !(m_pDevice->GetRenderCaps() & FXRC_ALPHA_IMAGE) &&
        !(m_pDevice->GetRenderCaps() & FXRC_GET_BITS)) {
      m_pCloneConvert = m_pDIBSource->CloneConvert(FXDIB_Rgb);
      if (!m_pCloneConvert)
        return false;

      pDib = m_pCloneConvert;
    }
    FX_RECT clip_box = m_pDevice->GetClipBox();
    clip_box.Intersect(image_rect);
    m_Status = 2;
    m_pTransformer = pdfium::MakeUnique<CFX_ImageTransformer>(
        pDib, &m_ImageMatrix, m_Flags, &clip_box);
    return true;
  }
  if (m_ImageMatrix.a < 0)
    dest_width = -dest_width;
  if (m_ImageMatrix.d > 0)
    dest_height = -dest_height;
  int dest_left, dest_top;
  dest_left = dest_width > 0 ? image_rect.left : image_rect.right;
  dest_top = dest_height > 0 ? image_rect.top : image_rect.bottom;
  if (m_pDIBSource->IsOpaqueImage()) {
    if (m_pDevice->StretchDIBitsWithFlagsAndBlend(
            m_pDIBSource, dest_left, dest_top, dest_width, dest_height, m_Flags,
            FXDIB_BLEND_NORMAL)) {
      return false;
    }
  }
  if (m_pDIBSource->IsAlphaMask()) {
    if (m_pDevice->StretchBitMaskWithFlags(m_pDIBSource, dest_left, dest_top,
                                           dest_width, dest_height, 0,
                                           m_Flags)) {
      return false;
    }
  }

  FX_RECT clip_box = m_pDevice->GetClipBox();
  FX_RECT dest_rect = clip_box;
  dest_rect.Intersect(image_rect);
  FX_RECT dest_clip(
      dest_rect.left - image_rect.left, dest_rect.top - image_rect.top,
      dest_rect.right - image_rect.left, dest_rect.bottom - image_rect.top);
  RetainPtr<CFX_DIBitmap> pStretched =
      m_pDIBSource->StretchTo(dest_width, dest_height, m_Flags, &dest_clip);
  if (pStretched)
    CompositeDIBitmap(pStretched, dest_rect.left, dest_rect.top);

  return false;
}

bool CXFA_ImageRenderer::Continue() {
  if (m_Status == 2) {
    if (m_pTransformer->Continue(nullptr))
      return true;

    RetainPtr<CFX_DIBitmap> pBitmap = m_pTransformer->DetachBitmap();
    if (!pBitmap)
      return false;

    if (pBitmap->IsAlphaMask()) {
      m_pDevice->SetBitMask(pBitmap, m_pTransformer->result().left,
                            m_pTransformer->result().top, 0);
    } else {
      m_pDevice->SetDIBitsWithBlend(pBitmap, m_pTransformer->result().left,
                                    m_pTransformer->result().top,
                                    FXDIB_BLEND_NORMAL);
    }
    return false;
  }
  if (m_Status == 3)
    return m_pDevice->ContinueDIBits(m_DeviceHandle.get(), nullptr);

  return false;
}

void CXFA_ImageRenderer::CompositeDIBitmap(
    const RetainPtr<CFX_DIBitmap>& pDIBitmap,
    int left,
    int top) {
  if (!pDIBitmap)
    return;

  if (!pDIBitmap->IsAlphaMask()) {
    if (m_pDevice->SetDIBits(pDIBitmap, left, top))
      return;
  } else if (m_pDevice->SetBitMask(pDIBitmap, left, top, 0)) {
    return;
  }

  bool bGetBackGround = ((m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT)) ||
                        (!(m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT) &&
                         (m_pDevice->GetRenderCaps() & FXRC_GET_BITS));
  if (bGetBackGround) {
    if (pDIBitmap->IsAlphaMask())
      return;

    m_pDevice->SetDIBitsWithBlend(pDIBitmap, left, top, FXDIB_BLEND_NORMAL);
    return;
  }
  if (!pDIBitmap->HasAlpha() ||
      (m_pDevice->GetRenderCaps() & FXRC_ALPHA_IMAGE)) {
    return;
  }

  RetainPtr<CFX_DIBitmap> pCloneConvert = pDIBitmap->CloneConvert(FXDIB_Rgb);
  if (!pCloneConvert)
    return;

  CXFA_ImageRenderer imageRender(m_pDevice, pCloneConvert, &m_ImageMatrix,
                                 m_Flags);
  if (!imageRender.Start())
    return;

  while (imageRender.Continue())
    continue;
}