remove agg from skia driver

Copy code from the agg driver so that the Skia
driver is no longer dependent on it.

The copied code doesn't in turn call
agg; it was in the agg driver for convenience.

Much of the copied code will eventually be replaced
by native Skia code, so there's not much point
in rewriting it to make it more efficient or
maintainable.

R=dsinclair@chromium.org,tsepez@chromium.org

Review URL: https://codereview.chromium.org/1865883002

2 files changed, 208 insertions, 30 deletions

diff --git a/core/fxge/skia/fx_skia_device.cpp b/core/fxge/skia/fx_skia_device.cpp
index 86d71d485b..4405ba9274 100644
--- a/core/fxge/skia/fx_skia_device.cpp
+++ b/core/fxge/skia/fx_skia_device.cpp
@@ -11,7 +11,6 @@
 #include "core/fpdfapi/fpdf_page/pageint.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
-#include "core/fxge/agg/fx_agg_driver.h"
 #include "core/fxge/skia/fx_skia_device.h"
 
 #include "third_party/skia/include/core/SkCanvas.h"
@@ -203,6 +202,108 @@ bool AddStitching(const CPDF_Function* pFunc,
   return true;
 }
 
+void RgbByteOrderTransferBitmap(CFX_DIBitmap* pBitmap,
+                                int dest_left,
+                                int dest_top,
+                                int width,
+                                int height,
+                                const CFX_DIBSource* pSrcBitmap,
+                                int src_left,
+                                int src_top) {
+  if (!pBitmap)
+    return;
+  pBitmap->GetOverlapRect(dest_left, dest_top, width, height,
+                          pSrcBitmap->GetWidth(), pSrcBitmap->GetHeight(),
+                          src_left, src_top, NULL);
+  if (width == 0 || height == 0)
+    return;
+  int Bpp = pBitmap->GetBPP() / 8;
+  FXDIB_Format dest_format = pBitmap->GetFormat();
+  FXDIB_Format src_format = pSrcBitmap->GetFormat();
+  int pitch = pBitmap->GetPitch();
+  uint8_t* buffer = pBitmap->GetBuffer();
+  if (dest_format == src_format) {
+    for (int row = 0; row < height; row++) {
+      uint8_t* dest_scan = buffer + (dest_top + row) * pitch + dest_left * Bpp;
+      uint8_t* src_scan =
+          (uint8_t*)pSrcBitmap->GetScanline(src_top + row) + src_left * Bpp;
+      if (Bpp == 4) {
+        for (int col = 0; col < width; col++) {
+          FXARGB_SETDIB(dest_scan, FXARGB_MAKE(src_scan[3], src_scan[0],
+                                               src_scan[1], src_scan[2]));
+          dest_scan += 4;
+          src_scan += 4;
+        }
+      } else {
+        for (int col = 0; col < width; col++) {
+          *dest_scan++ = src_scan[2];
+          *dest_scan++ = src_scan[1];
+          *dest_scan++ = src_scan[0];
+          src_scan += 3;
+        }
+      }
+    }
+    return;
+  }
+  uint8_t* dest_buf = buffer + dest_top * pitch + dest_left * Bpp;
+  if (dest_format == FXDIB_Rgb) {
+    if (src_format == FXDIB_Rgb32) {
+      for (int row = 0; row < height; row++) {
+        uint8_t* dest_scan = dest_buf + row * pitch;
+        uint8_t* src_scan =
+            (uint8_t*)pSrcBitmap->GetScanline(src_top + row) + src_left * 4;
+        for (int col = 0; col < width; col++) {
+          *dest_scan++ = src_scan[2];
+          *dest_scan++ = src_scan[1];
+          *dest_scan++ = src_scan[0];
+          src_scan += 4;
+        }
+      }
+    } else {
+      ASSERT(FALSE);
+    }
+  } else if (dest_format == FXDIB_Argb || dest_format == FXDIB_Rgb32) {
+    if (src_format == FXDIB_Rgb) {
+      for (int row = 0; row < height; row++) {
+        uint8_t* dest_scan = (uint8_t*)(dest_buf + row * pitch);
+        uint8_t* src_scan =
+            (uint8_t*)pSrcBitmap->GetScanline(src_top + row) + src_left * 3;
+        if (src_format == FXDIB_Argb) {
+          for (int col = 0; col < width; col++) {
+            FXARGB_SETDIB(dest_scan, FXARGB_MAKE(0xff, FX_GAMMA(src_scan[0]),
+                                                 FX_GAMMA(src_scan[1]),
+                                                 FX_GAMMA(src_scan[2])));
+            dest_scan += 4;
+            src_scan += 3;
+          }
+        } else {
+          for (int col = 0; col < width; col++) {
+            FXARGB_SETDIB(dest_scan, FXARGB_MAKE(0xff, src_scan[0], src_scan[1],
+                                                 src_scan[2]));
+            dest_scan += 4;
+            src_scan += 3;
+          }
+        }
+      }
+    } else if (src_format == FXDIB_Rgb32) {
+      ASSERT(dest_format == FXDIB_Argb);
+      for (int row = 0; row < height; row++) {
+        uint8_t* dest_scan = dest_buf + row * pitch;
+        uint8_t* src_scan =
+            (uint8_t*)(pSrcBitmap->GetScanline(src_top + row) + src_left * 4);
+        for (int col = 0; col < width; col++) {
+          FXARGB_SETDIB(dest_scan, FXARGB_MAKE(0xff, src_scan[0], src_scan[1],
+                                               src_scan[2]));
+          src_scan += 4;
+          dest_scan += 4;
+        }
+      }
+    }
+  } else {
+    ASSERT(FALSE);
+  }
+}
+
 }  // namespace
 
 // convert a stroking path to scanlines
@@ -275,40 +376,46 @@ CFX_SkiaDeviceDriver::CFX_SkiaDeviceDriver(CFX_DIBitmap* pBitmap,
                                            FX_BOOL bRgbByteOrder,
                                            CFX_DIBitmap* pOriDevice,
                                            FX_BOOL bGroupKnockout)
-    : m_pRecorder(nullptr) {
-  m_pAggDriver = new CFX_AggDeviceDriver(pBitmap, dither_bits, bRgbByteOrder,
-                                         pOriDevice, bGroupKnockout);
+    : m_pBitmap(pBitmap),
+      m_pOriDevice(pOriDevice),
+      m_pRecorder(nullptr),
+      m_ditherBits(dither_bits),
+      m_bRgbByteOrder(bRgbByteOrder),
+      m_bGroupKnockout(bGroupKnockout) {
   SkBitmap skBitmap;
-  const CFX_DIBitmap* bitmap = m_pAggDriver->GetBitmap();
   SkImageInfo imageInfo =
-      SkImageInfo::Make(bitmap->GetWidth(), bitmap->GetHeight(),
+      SkImageInfo::Make(pBitmap->GetWidth(), pBitmap->GetHeight(),
                         kN32_SkColorType, kOpaque_SkAlphaType);
-  skBitmap.installPixels(imageInfo, bitmap->GetBuffer(), bitmap->GetPitch(),
+  skBitmap.installPixels(imageInfo, pBitmap->GetBuffer(), pBitmap->GetPitch(),
                          nullptr, /* to do : set color table */
                          nullptr, nullptr);
   m_pCanvas = new SkCanvas(skBitmap);
-  m_ditherBits = dither_bits;
 }
 
 CFX_SkiaDeviceDriver::CFX_SkiaDeviceDriver(int size_x, int size_y)
-    : m_pRecorder(new SkPictureRecorder) {
-  m_pAggDriver = nullptr;
+    : m_pBitmap(nullptr),
+      m_pOriDevice(nullptr),
+      m_pRecorder(new SkPictureRecorder),
+      m_ditherBits(0),
+      m_bRgbByteOrder(FALSE),
+      m_bGroupKnockout(FALSE) {
   m_pRecorder->beginRecording(SkIntToScalar(size_x), SkIntToScalar(size_y));
   m_pCanvas = m_pRecorder->getRecordingCanvas();
-  m_ditherBits = 0;
 }
 
 CFX_SkiaDeviceDriver::CFX_SkiaDeviceDriver(SkPictureRecorder* recorder)
-    : m_pRecorder(recorder) {
-  m_pAggDriver = nullptr;
+    : m_pBitmap(nullptr),
+      m_pOriDevice(nullptr),
+      m_pRecorder(recorder),
+      m_ditherBits(0),
+      m_bRgbByteOrder(FALSE),
+      m_bGroupKnockout(FALSE) {
   m_pCanvas = m_pRecorder->getRecordingCanvas();
-  m_ditherBits = 0;
 }
 
 CFX_SkiaDeviceDriver::~CFX_SkiaDeviceDriver() {
   if (!m_pRecorder)
     delete m_pCanvas;
-  delete m_pAggDriver;
 }
 
 FX_BOOL CFX_SkiaDeviceDriver::DrawDeviceText(int nChars,
@@ -577,8 +684,45 @@ FX_BOOL CFX_SkiaDeviceDriver::GetDIBits(CFX_DIBitmap* pBitmap,
                                         int top,
                                         void* pIccTransform,
                                         FX_BOOL bDEdge) {
-  return m_pAggDriver &&
-         m_pAggDriver->GetDIBits(pBitmap, left, top, pIccTransform, bDEdge);
+  if (!m_pBitmap->GetBuffer())
+    return TRUE;
+  if (bDEdge) {
+    if (m_bRgbByteOrder) {
+      RgbByteOrderTransferBitmap(pBitmap, 0, 0, pBitmap->GetWidth(),
+                                 pBitmap->GetHeight(), m_pBitmap, left, top);
+    } else {
+      return pBitmap->TransferBitmap(0, 0, pBitmap->GetWidth(),
+                                     pBitmap->GetHeight(), m_pBitmap, left, top,
+                                     pIccTransform);
+    }
+    return TRUE;
+  }
+  FX_RECT rect(left, top, left + pBitmap->GetWidth(),
+               top + pBitmap->GetHeight());
+  CFX_DIBitmap* pBack;
+  if (m_pOriDevice) {
+    pBack = m_pOriDevice->Clone(&rect);
+    if (!pBack)
+      return TRUE;
+    pBack->CompositeBitmap(0, 0, pBack->GetWidth(), pBack->GetHeight(),
+                           m_pBitmap, 0, 0);
+  } else {
+    pBack = m_pBitmap->Clone(&rect);
+    if (!pBack)
+      return TRUE;
+  }
+  FX_BOOL bRet = TRUE;
+  left = left >= 0 ? 0 : left;
+  top = top >= 0 ? 0 : top;
+  if (m_bRgbByteOrder) {
+    RgbByteOrderTransferBitmap(pBitmap, 0, 0, rect.Width(), rect.Height(),
+                               pBack, left, top);
+  } else {
+    bRet = pBitmap->TransferBitmap(0, 0, rect.Width(), rect.Height(), pBack,
+                                   left, top, pIccTransform);
+  }
+  delete pBack;
+  return bRet;
 }
 
 FX_BOOL CFX_SkiaDeviceDriver::SetDIBits(const CFX_DIBSource* pBitmap,
@@ -589,9 +733,17 @@ FX_BOOL CFX_SkiaDeviceDriver::SetDIBits(const CFX_DIBSource* pBitmap,
                                         int blend_type,
                                         int alpha_flag,
                                         void* pIccTransform) {
-  return m_pAggDriver &&
-         m_pAggDriver->SetDIBits(pBitmap, argb, pSrcRect, left, top, blend_type,
-                                 alpha_flag, pIccTransform);
+  if (!m_pBitmap->GetBuffer())
+    return TRUE;
+  if (pBitmap->IsAlphaMask()) {
+    return m_pBitmap->CompositeMask(
+        left, top, pSrcRect->Width(), pSrcRect->Height(), pBitmap, argb,
+        pSrcRect->left, pSrcRect->top, blend_type, nullptr, m_bRgbByteOrder,
+        alpha_flag, pIccTransform);
+  }
+  return m_pBitmap->CompositeBitmap(
+      left, top, pSrcRect->Width(), pSrcRect->Height(), pBitmap, pSrcRect->left,
+      pSrcRect->top, blend_type, nullptr, m_bRgbByteOrder, pIccTransform);
 }
 
 FX_BOOL CFX_SkiaDeviceDriver::StretchDIBits(const CFX_DIBSource* pSource,
@@ -605,10 +757,30 @@ FX_BOOL CFX_SkiaDeviceDriver::StretchDIBits(const CFX_DIBSource* pSource,
                                             int alpha_flag,
                                             void* pIccTransform,
                                             int blend_type) {
-  return m_pAggDriver &&
-         m_pAggDriver->StretchDIBits(pSource, argb, dest_left, dest_top,
-                                     dest_width, dest_height, pClipRect, flags,
-                                     alpha_flag, pIccTransform, blend_type);
+  if (!m_pBitmap->GetBuffer())
+    return TRUE;
+  if (dest_width == pSource->GetWidth() &&
+      dest_height == pSource->GetHeight()) {
+    FX_RECT rect(0, 0, dest_width, dest_height);
+    return SetDIBits(pSource, argb, &rect, dest_left, dest_top, blend_type,
+                     alpha_flag, pIccTransform);
+  }
+  FX_RECT dest_rect(dest_left, dest_top, dest_left + dest_width,
+                    dest_top + dest_height);
+  dest_rect.Normalize();
+  FX_RECT dest_clip = dest_rect;
+  dest_clip.Intersect(*pClipRect);
+  CFX_BitmapComposer composer;
+  composer.Compose(m_pBitmap, nullptr, 255, argb, dest_clip, FALSE, FALSE,
+                   FALSE, m_bRgbByteOrder, alpha_flag, pIccTransform,
+                   blend_type);
+  dest_clip.Offset(-dest_rect.left, -dest_rect.top);
+  CFX_ImageStretcher stretcher;
+  if (stretcher.Start(&composer, pSource, dest_width, dest_height, dest_clip,
+                      flags)) {
+    stretcher.Continue(NULL);
+  }
+  return TRUE;
 }
 
 FX_BOOL CFX_SkiaDeviceDriver::StartDIBits(const CFX_DIBSource* pSource,
@@ -698,12 +870,15 @@ FX_BOOL CFX_SkiaDeviceDriver::StartDIBits(const CFX_DIBSource* pSource,
 }
 
 FX_BOOL CFX_SkiaDeviceDriver::ContinueDIBits(void* pHandle, IFX_Pause* pPause) {
-  return m_pAggDriver && m_pAggDriver->ContinueDIBits(pHandle, pPause);
+  if (!m_pBitmap->GetBuffer())
+    return TRUE;
+  return ((CFX_ImageRenderer*)pHandle)->Continue(pPause);
 }
 
 void CFX_SkiaDeviceDriver::CancelDIBits(void* pHandle) {
-  if (m_pAggDriver)
-    m_pAggDriver->CancelDIBits(pHandle);
+  if (!m_pBitmap->GetBuffer())
+    return;
+  delete (CFX_ImageRenderer*)pHandle;
 }
 
 CFX_SkiaDevice::CFX_SkiaDevice() {
diff --git a/core/fxge/skia/fx_skia_device.h b/core/fxge/skia/fx_skia_device.h
index afc505da6e..05a102489e 100644
--- a/core/fxge/skia/fx_skia_device.h
+++ b/core/fxge/skia/fx_skia_device.h
@@ -84,7 +84,7 @@ class CFX_SkiaDeviceDriver : public IFX_RenderDeviceDriver {
                     void* pIccTransform = NULL,
                     FX_BOOL bDEdge = FALSE) override;
 
-  CFX_DIBitmap* GetBackDrop() override { return m_pAggDriver->GetBackDrop(); }
+  CFX_DIBitmap* GetBackDrop() override { return m_pOriDevice; }
 
   FX_BOOL SetDIBits(const CFX_DIBSource* pBitmap,
                     uint32_t color,
@@ -133,17 +133,20 @@ class CFX_SkiaDeviceDriver : public IFX_RenderDeviceDriver {
                       int alpha,
                       FX_BOOL bAlphaMode) override;
 
-  virtual uint8_t* GetBuffer() const { return m_pAggDriver->GetBuffer(); }
+  virtual uint8_t* GetBuffer() const { return m_pBitmap->GetBuffer(); }
   void PaintStroke(SkPaint* spaint,
                    const CFX_GraphStateData* pGraphState,
                    const SkMatrix& matrix);
   SkPictureRecorder* GetRecorder() const { return m_pRecorder; }
 
  private:
-  CFX_AggDeviceDriver* m_pAggDriver;
+  CFX_DIBitmap* m_pBitmap;
+  CFX_DIBitmap* m_pOriDevice;
   SkCanvas* m_pCanvas;
   SkPictureRecorder* const m_pRecorder;
   int m_ditherBits;
+  FX_BOOL m_bRgbByteOrder;
+  FX_BOOL m_bGroupKnockout;
 };
 #endif  // defined(_SKIA_SUPPORT_)