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-rw-r--r--core/fpdfapi/fpdf_render/fpdf_render.cpp9
-rw-r--r--core/fpdfapi/fpdf_render/fpdf_render_image.cpp11
2 files changed, 18 insertions, 2 deletions
diff --git a/core/fpdfapi/fpdf_render/fpdf_render.cpp b/core/fpdfapi/fpdf_render/fpdf_render.cpp
index a3dbbdb3f2..6ac78ecd43 100644
--- a/core/fpdfapi/fpdf_render/fpdf_render.cpp
+++ b/core/fpdfapi/fpdf_render/fpdf_render.cpp
@@ -815,14 +815,19 @@ FX_BOOL CPDF_RenderStatus::ProcessTransparency(const CPDF_PageObject* pPageObj,
bitmap->MultiplyAlpha(pTextMask.get());
pTextMask.reset();
}
+ int32_t blitAlpha = 255;
if (Transparency & PDFTRANS_GROUP && group_alpha != 1.0f) {
- bitmap->MultiplyAlpha((int32_t)(group_alpha * 255));
+ blitAlpha = (int32_t)(group_alpha * 255);
+#ifndef _SKIA_SUPPORT_
+ bitmap->MultiplyAlpha(blitAlpha);
+ blitAlpha = 255;
+#endif
}
Transparency = m_Transparency;
if (pPageObj->IsForm()) {
Transparency |= PDFTRANS_GROUP;
}
- CompositeDIBitmap(bitmap, rect.left, rect.top, 0, 255, blend_type,
+ CompositeDIBitmap(bitmap, rect.left, rect.top, 0, blitAlpha, blend_type,
Transparency);
return TRUE;
}
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_image.cpp b/core/fpdfapi/fpdf_render/fpdf_render_image.cpp
index d3fbb7990c..acfb20314a 100644
--- a/core/fpdfapi/fpdf_render/fpdf_render_image.cpp
+++ b/core/fpdfapi/fpdf_render/fpdf_render_image.cpp
@@ -48,7 +48,15 @@ void CPDF_RenderStatus::CompositeDIBitmap(CFX_DIBitmap* pDIBitmap,
if (blend_mode == FXDIB_BLEND_NORMAL) {
if (!pDIBitmap->IsAlphaMask()) {
if (bitmap_alpha < 255) {
+#ifdef _SKIA_SUPPORT_
+ void* dummy;
+ CFX_Matrix m(pDIBitmap->GetWidth(), 0, 0, -pDIBitmap->GetHeight(), left,
+ top + pDIBitmap->GetHeight());
+ m_pDevice->StartDIBits(pDIBitmap, bitmap_alpha, 0, &m, 0, dummy);
+ return;
+#else
pDIBitmap->MultiplyAlpha(bitmap_alpha);
+#endif
}
if (m_pDevice->SetDIBits(pDIBitmap, left, top)) {
return;
@@ -693,6 +701,9 @@ FX_BOOL CPDF_ImageRenderer::DrawMaskedImage() {
}
bitmap_device2.GetBitmap()->ConvertFormat(FXDIB_8bppMask);
bitmap_device1.GetBitmap()->MultiplyAlpha(bitmap_device2.GetBitmap());
+#ifdef _SKIA_SUPPORT_
+ bitmap_device1.PreMultiply(); // convert unpremultiplied to premultiplied
+#endif
if (m_BitmapAlpha < 255) {
bitmap_device1.GetBitmap()->MultiplyAlpha(m_BitmapAlpha);
}