From 78760fd8a5b310ca4e8de502e510b95c9b4c880c Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Mon, 9 Oct 2023 22:25:54 +0800
Subject: ...

---
 src/platform/graphics/web_canvas/CMakeLists.txt   |  1 +
 src/platform/graphics/web_canvas/Factory.cpp      |  7 +++++++
 src/platform/graphics/web_canvas/Painter.cpp      | 23 ++++++++++++++++++-----
 src/platform/graphics/web_canvas/WebCanvasRef.cpp | 16 ++++++++++++++++
 4 files changed, 42 insertions(+), 5 deletions(-)
 create mode 100644 src/platform/graphics/web_canvas/WebCanvasRef.cpp

(limited to 'src/platform/graphics/web_canvas')

diff --git a/src/platform/graphics/web_canvas/CMakeLists.txt b/src/platform/graphics/web_canvas/CMakeLists.txt
index 6edc2edb..bbf736e0 100644
--- a/src/platform/graphics/web_canvas/CMakeLists.txt
+++ b/src/platform/graphics/web_canvas/CMakeLists.txt
@@ -3,6 +3,7 @@ add_library(CruPlatformGraphicsWebCanvas
 	Factory.cpp
 	Painter.cpp
 	Resource.cpp
+	WebCanvasRef.cpp
 )
 
 target_link_libraries(CruPlatformGraphicsWebCanvas PUBLIC CruPlatformBaseWeb CruPlatformGraphics)
diff --git a/src/platform/graphics/web_canvas/Factory.cpp b/src/platform/graphics/web_canvas/Factory.cpp
index e69de29b..be14ae18 100644
--- a/src/platform/graphics/web_canvas/Factory.cpp
+++ b/src/platform/graphics/web_canvas/Factory.cpp
@@ -0,0 +1,7 @@
+#include "cru/platform/graphics/web_canvas/WebCanvasGraphicsFactory.h"
+
+namespace cru::platform::graphics::web_canvas {
+WebCanvasGraphicsFactory::WebCanvasGraphicsFactory() { }
+
+WebCanvasGraphicsFactory::~WebCanvasGraphicsFactory() { }
+}
diff --git a/src/platform/graphics/web_canvas/Painter.cpp b/src/platform/graphics/web_canvas/Painter.cpp
index cd04a725..31c4a53d 100644
--- a/src/platform/graphics/web_canvas/Painter.cpp
+++ b/src/platform/graphics/web_canvas/Painter.cpp
@@ -1,5 +1,6 @@
 #include "cru/platform/graphics/web_canvas/WebCanvasGraphicsFactory.h"
 #include "cru/platform/graphics/web_canvas/WebCanvasPainter.h"
+#include "cru/platform/graphics/web_canvas/WebCanvasRef.h"
 #include "cru/platform/graphics/web_canvas/WebCanvasResource.h"
 
 #include <optional>
@@ -7,9 +8,10 @@
 namespace cru::platform::graphics::web_canvas {
 
 namespace {
-void contextSetTransform(emscripten::val context, const Matrix& matrix) {
-  context.call<void>("setTransform", matrix.m11, matrix.m12, matrix.m21,
-                     matrix.m22, matrix.m31, matrix.m32);
+void contextDoTransform(emscripten::val context, const char* method,
+                        const Matrix& matrix) {
+  context.call<void>(method, matrix.m11, matrix.m12, matrix.m21, matrix.m22,
+                     matrix.m31, matrix.m32);
 }
 }  // namespace
 
@@ -19,7 +21,7 @@ WebCanvasPainter::WebCanvasPainter(WebCanvasGraphicsFactory* factory,
     : WebCanvasResource(factory),
       context_(context),
       current_transform_(current_transform.value_or(Matrix::Identity())) {
-  contextSetTransform(context_, current_transform_);
+  contextDoTransform(context_, "setTransform", current_transform_);
 }
 
 WebCanvasPainter::~WebCanvasPainter() {}
@@ -28,6 +30,17 @@ Matrix WebCanvasPainter::GetTransform() { return current_transform_; }
 
 void WebCanvasPainter::SetTransform(const Matrix& transform) {
   current_transform_ = transform;
-  contextSetTransform(context_, transform);
+  contextDoTransform(context_, "setTransform", current_transform_);
+}
+
+void WebCanvasPainter::ConcatTransform(const Matrix& transform) {
+  current_transform_ *= transform;
+  contextDoTransform(context_, "transform", transform);
+}
+
+void WebCanvasPainter::Clear(const Color& color) {}
+
+WebCanvasRef WebCanvasPainter::GetCanvas() {
+  return WebCanvasRef(context_["canvas"]);
 }
 }  // namespace cru::platform::graphics::web_canvas
diff --git a/src/platform/graphics/web_canvas/WebCanvasRef.cpp b/src/platform/graphics/web_canvas/WebCanvasRef.cpp
new file mode 100644
index 00000000..c4f75626
--- /dev/null
+++ b/src/platform/graphics/web_canvas/WebCanvasRef.cpp
@@ -0,0 +1,16 @@
+#include "cru/platform/graphics/web_canvas/WebCanvasRef.h"
+#include "cru/platform/web/JsUtility.h"
+
+#include <cassert>
+#include <utility>
+
+namespace cru::platform::graphics::web_canvas {
+WebCanvasRef::WebCanvasRef(emscripten::val canvas_val)
+    : val_(std::move(canvas_val)) {
+  assert(web::IsNotNullAndInstanceOf(val_, "HTMLCanvasElement"));
+}
+
+int WebCanvasRef::GetWidth() const { return val_["width"].as<int>(); }
+
+int WebCanvasRef::GetHeight() const { return val_["height"].as<int>(); }
+}  // namespace cru::platform::graphics::web_canvas
-- 
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