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Manual merge of fix png alpha channel support for gtk3 #5298

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This commit is contained in:
Vojtech Bubnik 2020-12-07 09:20:12 +01:00
parent 10be5d1361
commit 44dacdd4f8
1 changed files with 14 additions and 11 deletions
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25
src/slic3r/GUI/BitmapCache.cpp
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@ -7,14 +7,11 @@
#include <boost/filesystem.hpp>
#if ! defined(WIN32) && ! defined(__APPLE__)
#define BROKEN_ALPHA
#endif
#ifdef BROKEN_ALPHA
#ifdef __WXGTK2__
// Broken alpha workaround
#include <wx/mstream.h>
#include <wx/rawbmp.h>
#endif /* BROKEN_ALPHA */
#endif /* __WXGTK2__ */
#define NANOSVG_IMPLEMENTATION
#include "nanosvg/nanosvg.h"
@ -44,7 +41,8 @@ void BitmapCache::clear()
static wxBitmap wxImage_to_wxBitmap_with_alpha(wxImage &&image, float scale = 1.0f)
{
#ifdef BROKEN_ALPHA
#ifdef __WXGTK2__
// Broken alpha workaround
wxMemoryOutputStream stream;
image.SaveFile(stream, wxBITMAP_TYPE_PNG);
wxStreamBuffer *buf = stream.GetOutputStreamBuffer();
@ -68,7 +66,11 @@ wxBitmap* BitmapCache::insert(const std::string &bitmap_key, size_t width, size_
wxBitmap *bitmap = nullptr;
auto it = m_map.find(bitmap_key);
if (it == m_map.end()) {
bitmap = new wxBitmap(width, height);
bitmap = new wxBitmap(width, height
#ifdef __WXGTK3__
, 32
#endif
);
#ifdef __APPLE__
// Contrary to intuition, the `scale` argument isn't "please scale this to such and such"
// but rather "the wxImage is sized for backing scale such and such".
@ -83,7 +85,8 @@ wxBitmap* BitmapCache::insert(const std::string &bitmap_key, size_t width, size_
if (size_t(bitmap->GetWidth()) != width || size_t(bitmap->GetHeight()) != height)
bitmap->Create(width, height);
}
#ifndef BROKEN_ALPHA
#if defined(WIN32) || defined(__APPLE__)
// Not needed or harmful for GTK2 and GTK3.
bitmap->UseAlpha();
#endif
return bitmap;
@ -131,8 +134,8 @@ wxBitmap* BitmapCache::insert(const std::string &bitmap_key, const wxBitmap *beg
#endif
}
#ifdef BROKEN_ALPHA
#ifdef __WXGTK2__
// Broken alpha workaround
wxImage image(width, height);
image.InitAlpha();
// Fill in with a white color.