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// 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/fpdfapi/page/cpdf_pageobjectholder.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() : m_pDevice(nullptr) {}
CXFA_ImageRenderer::~CXFA_ImageRenderer() {}
bool CXFA_ImageRenderer::Start(CFX_RenderDevice* pDevice,
const RetainPtr<CFX_DIBSource>& pDIBSource,
FX_ARGB bitmap_argb,
int bitmap_alpha,
const CFX_Matrix* pImage2Device,
uint32_t flags,
int blendType) {
m_pDevice = pDevice;
m_pDIBSource = pDIBSource;
m_FillArgb = bitmap_argb;
m_BitmapAlpha = bitmap_alpha;
m_ImageMatrix = *pImage2Device;
m_Flags = flags;
m_BlendType = blendType;
return StartDIBSource();
}
bool CXFA_ImageRenderer::StartDIBSource() {
if (m_pDevice->StartDIBitsWithBlend(m_pDIBSource, m_BitmapAlpha, m_FillArgb,
&m_ImageMatrix, m_Flags, &m_DeviceHandle,
m_BlendType)) {
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)) {
if (m_bPrint && !(m_pDevice->GetRenderCaps() & FXRC_BLEND_MODE)) {
m_Result = false;
return false;
}
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) {
m_Result = false;
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() && m_BitmapAlpha == 255) {
if (m_pDevice->StretchDIBitsWithFlagsAndBlend(
m_pDIBSource, dest_left, dest_top, dest_width, dest_height, m_Flags,
m_BlendType)) {
return false;
}
}
if (m_pDIBSource->IsAlphaMask()) {
if (m_BitmapAlpha != 255) {
m_FillArgb = FXARGB_MUL_ALPHA(m_FillArgb, m_BitmapAlpha);
}
if (m_pDevice->StretchBitMaskWithFlags(m_pDIBSource, dest_left, dest_top,
dest_width, dest_height, m_FillArgb,
m_Flags)) {
return false;
}
}
if (m_bPrint && !(m_pDevice->GetRenderCaps() & FXRC_BLEND_MODE)) {
m_Result = false;
return true;
}
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, m_FillArgb,
m_BitmapAlpha, m_BlendType, false);
}
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()) {
if (m_BitmapAlpha != 255)
m_FillArgb = FXARGB_MUL_ALPHA(m_FillArgb, m_BitmapAlpha);
m_Result =
m_pDevice->SetBitMask(pBitmap, m_pTransformer->result().left,
m_pTransformer->result().top, m_FillArgb);
} else {
if (m_BitmapAlpha != 255)
pBitmap->MultiplyAlpha(m_BitmapAlpha);
m_Result = m_pDevice->SetDIBitsWithBlend(
pBitmap, m_pTransformer->result().left, m_pTransformer->result().top,
m_BlendType);
}
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,
FX_ARGB mask_argb,
int bitmap_alpha,
int blend_mode,
int iTransparency) {
if (!pDIBitmap) {
return;
}
bool bIsolated = !!(iTransparency & PDFTRANS_ISOLATED);
bool bGroup = !!(iTransparency & PDFTRANS_GROUP);
if (blend_mode == FXDIB_BLEND_NORMAL) {
if (!pDIBitmap->IsAlphaMask()) {
if (bitmap_alpha < 255) {
pDIBitmap->MultiplyAlpha(bitmap_alpha);
}
if (m_pDevice->SetDIBits(pDIBitmap, left, top)) {
return;
}
} else {
uint32_t fill_argb = (mask_argb);
if (bitmap_alpha < 255) {
((uint8_t*)&fill_argb)[3] =
((uint8_t*)&fill_argb)[3] * bitmap_alpha / 255;
}
if (m_pDevice->SetBitMask(pDIBitmap, left, top, fill_argb)) {
return;
}
}
}
bool bBackAlphaRequired = blend_mode && bIsolated;
bool bGetBackGround =
((m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT)) ||
(!(m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT) &&
(m_pDevice->GetRenderCaps() & FXRC_GET_BITS) && !bBackAlphaRequired);
if (bGetBackGround) {
if (bIsolated || !bGroup) {
if (pDIBitmap->IsAlphaMask()) {
return;
}
m_pDevice->SetDIBitsWithBlend(pDIBitmap, left, top, blend_mode);
} else {
FX_RECT rect(left, top, left + pDIBitmap->GetWidth(),
top + pDIBitmap->GetHeight());
rect.Intersect(m_pDevice->GetClipBox());
RetainPtr<CFX_DIBitmap> pClone;
if (m_pDevice->GetBackDrop() && m_pDevice->GetBitmap()) {
pClone = m_pDevice->GetBackDrop()->Clone(&rect);
RetainPtr<CFX_DIBitmap> pForeBitmap = m_pDevice->GetBitmap();
pClone->CompositeBitmap(0, 0, pClone->GetWidth(), pClone->GetHeight(),
pForeBitmap, rect.left, rect.top);
left = left >= 0 ? 0 : left;
top = top >= 0 ? 0 : top;
if (!pDIBitmap->IsAlphaMask())
pClone->CompositeBitmap(0, 0, pClone->GetWidth(), pClone->GetHeight(),
pDIBitmap, left, top, blend_mode);
else
pClone->CompositeMask(0, 0, pClone->GetWidth(), pClone->GetHeight(),
pDIBitmap, mask_argb, left, top, blend_mode);
} else {
pClone = pDIBitmap;
}
if (m_pDevice->GetBackDrop()) {
m_pDevice->SetDIBits(pClone, rect.left, rect.top);
} else {
if (pDIBitmap->IsAlphaMask())
return;
m_pDevice->SetDIBitsWithBlend(pDIBitmap, rect.left, rect.top,
blend_mode);
}
}
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;
if (!imageRender.Start(m_pDevice, pCloneConvert, m_FillArgb, m_BitmapAlpha,
&m_ImageMatrix, m_Flags)) {
return;
}
while (imageRender.Continue())
continue;
}
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