From a4dafa3e2918f2cc28657145e6b0afe7bcf1ca7b Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Sun, 24 Oct 2021 18:59:07 +0800
Subject: ...

---
 src/osx/Convert.cpp                 |  3 +-
 src/osx/graphics/quartz/Painter.cpp | 60 +++++++++++++++++++++++++++++--------
 2 files changed, 49 insertions(+), 14 deletions(-)

(limited to 'src')

diff --git a/src/osx/Convert.cpp b/src/osx/Convert.cpp
index e8c023e9..6bec5adc 100644
--- a/src/osx/Convert.cpp
+++ b/src/osx/Convert.cpp
@@ -1,8 +1,9 @@
 #include "cru/osx/Convert.hpp"
-#include <string>
 
 #include "cru/common/StringUtil.hpp"
 
+#include <string>
+
 namespace cru::platform::osx {
 CFStringRef Convert(const String& string) {
   return CFStringCreateWithBytes(
diff --git a/src/osx/graphics/quartz/Painter.cpp b/src/osx/graphics/quartz/Painter.cpp
index 406e3273..eee175ac 100644
--- a/src/osx/graphics/quartz/Painter.cpp
+++ b/src/osx/graphics/quartz/Painter.cpp
@@ -21,6 +21,13 @@ QuartzCGContextPainter::QuartzCGContextPainter(
       size_(size),
       on_end_draw_(std::move(on_end_draw)) {
   Expects(cg_context);
+
+  CGContextConcatCTM(cg_context_,
+                     CGAffineTransformInvert(CGContextGetCTM(cg_context_)));
+
+  transform_ = Matrix::Scale(1, -1) * Matrix::Translation(0, size.height);
+  CGContextConcatCTM(cg_context_, Convert(transform_));
+
   // log::TagDebug(log_tag,
   //               u"Created with CGContext: {}, Auto Release: {},  Size: {}.",
   //               cg_context, auto_release, size_);
@@ -34,15 +41,17 @@ QuartzCGContextPainter::~QuartzCGContextPainter() {
   }
 }
 
-Matrix QuartzCGContextPainter::GetTransform() {
-  return Convert(CGContextGetCTM(cg_context_));
-}
+Matrix QuartzCGContextPainter::GetTransform() { return transform_; }
 
 void QuartzCGContextPainter::SetTransform(const Matrix& matrix) {
-  auto old = CGContextGetCTM(cg_context_);
-  old = CGAffineTransformInvert(old);
-  CGContextConcatCTM(cg_context_, old);
+  CGContextConcatCTM(cg_context_, Convert(*transform_.Inverted()));
+  CGContextConcatCTM(cg_context_, Convert(matrix));
+  transform_ = matrix;
+}
+
+void QuartzCGContextPainter::ConcatTransform(const Matrix& matrix) {
   CGContextConcatCTM(cg_context_, Convert(matrix));
+  transform_ = matrix * transform_;
 }
 
 void QuartzCGContextPainter::Clear(const Color& color) {
@@ -128,13 +137,28 @@ void QuartzCGContextPainter::DrawText(const Point& offset,
     color = colors::black;
   }
 
-  util::WithTransform(this, Matrix::Translation(offset),
-                      [this, tl, color](IPainter*) {
-                        auto frame = tl->CreateFrameWithColor(color);
-                        Ensures(frame);
-                        CTFrameDraw(frame, cg_context_);
-                        CFRelease(frame);
-                      });
+  auto bounds = tl->GetTextBounds();
+
+  bounds.width += bounds.left;
+  bounds.height += bounds.top;
+  bounds.left = bounds.top = 0;
+
+  Matrix transform =
+      Matrix::Translation(-bounds.width / 2, -bounds.height / 2) *
+      Matrix::Scale(1, -1) *
+      Matrix::Translation(bounds.width / 2, bounds.height / 2);
+
+  CGContextSaveGState(cg_context_);
+
+  CGContextConcatCTM(cg_context_, Convert(transform * Matrix::Translation(
+                                                          offset.x, offset.y)));
+
+  auto frame = tl->CreateFrameWithColor(color);
+  Ensures(frame);
+  CTFrameDraw(frame, cg_context_);
+  CFRelease(frame);
+
+  CGContextRestoreGState(cg_context_);
 }
 
 void QuartzCGContextPainter::PushLayer(const Rect& bounds) {
@@ -153,6 +177,16 @@ void QuartzCGContextPainter::PopLayer() {
   }
 }
 
+void QuartzCGContextPainter::PushState() {
+  Validate();
+  CGContextSaveGState(cg_context_);
+}
+
+void QuartzCGContextPainter::PopState() {
+  Validate();
+  CGContextRestoreGState(cg_context_);
+}
+
 void QuartzCGContextPainter::EndDraw() { DoEndDraw(); }
 
 void QuartzCGContextPainter::DoEndDraw() {
-- 
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