From 123fa7d10697d9ccbd80c611737f98c4d480a32f Mon Sep 17 00:00:00 2001
From: Hamed Zaghaghi <hamed.zaghaghi@gmail.com>
Date: Tue, 24 Mar 2020 05:51:02 +0430
Subject: [PATCH] add css export

---
 data/pref.xml                         |   6 +
 data/strings/en.ini                   |   6 +
 data/widgets/css_options.xml          |  25 +++
 data/widgets/options.xml              |   1 +
 src/app/CMakeLists.txt                |   1 +
 src/app/commands/cmd_options.cpp      |   1 +
 src/app/file/css_format.cpp           | 299 ++++++++++++++++++++++++++
 src/app/file/file_formats_manager.cpp |   2 +
 src/dio/detect_format.cpp             |   3 +
 src/dio/file_format.h                 |   1 +
 10 files changed, 345 insertions(+)
 create mode 100644 data/widgets/css_options.xml
 create mode 100644 src/app/file/css_format.cpp

diff --git a/data/pref.xml b/data/pref.xml
index e26f33032..4447fd48c 100644
--- a/data/pref.xml
+++ b/data/pref.xml
@@ -330,6 +330,12 @@
       <option id="bits_per_pixel" type="int" default="0" />
       <option id="compress" type="bool" default="true" />
     </section>
+    <section id="css">
+      <option id="show_alert" type="bool" default="true" />
+      <option id="pixel_scale" type="int" default="1" />
+      <option id="with_vars" type="bool" default="true" />
+      <option id="generate_html" type="bool" default="false" />
+    </section>
     <section id="webp">
       <option id="show_alert" type="bool" default="true" />
       <option id="loop" type="bool" default="true" />
diff --git a/data/strings/en.ini b/data/strings/en.ini
index 3a4961ad5..fe573bed0 100644
--- a/data/strings/en.ini
+++ b/data/strings/en.ini
@@ -1429,6 +1429,12 @@ title = TGA Options
 bits_per_pixel = Bits Per Pixel
 compress = Compress
 
+[css_options]
+title = CSS Options
+pixel_scale = Pixel Scale
+with_vars = Use CSS3 Variables
+generate_html = Generate Sample HTML File
+
 [timeline_conf]
 position = Position:
 left = &Left
diff --git a/data/widgets/css_options.xml b/data/widgets/css_options.xml
new file mode 100644
index 000000000..f353d6e68
--- /dev/null
+++ b/data/widgets/css_options.xml
@@ -0,0 +1,25 @@
+<!-- Aseprite -->
+<!-- Copyright (C) 2018 by Igara Studio S.A. -->
+<gui>
+<window id="css_options" text="@.title">
+  <grid columns="2">
+    <label text="@.pixel_scale" />
+    <expr id="pixel_scale" magnet="true" cell_align="horizontal"/>
+
+    <check text="@.with_vars" id="with_vars" cell_hspan="2" />
+    
+    <check text="@.generate_html" id="generate_html" cell_hspan="2" />
+
+    <separator horizontal="true" cell_hspan="2" />
+
+    <hbox cell_hspan="2">
+      <check text="@general.dont_show" id="dont_show" tooltip="@general.dont_show_tooltip" />
+      <boxfiller />
+    </hbox>
+    <box horizontal="true" homogeneous="true" cell_hspan="2" cell_align="right">
+      <button text="@general.ok" closewindow="true" id="ok" magnet="true" minwidth="60" />
+      <button text="@general.cancel" closewindow="true" />
+    </box>
+  </grid>
+</window>
+</gui>
diff --git a/data/widgets/options.xml b/data/widgets/options.xml
index c78aeaa54..af7d5281b 100644
--- a/data/widgets/options.xml
+++ b/data/widgets/options.xml
@@ -420,6 +420,7 @@
             <check id="jpeg_options_alert" text="jpeg" pref="jpeg.show_alert" />
             <check id="svg_options_alert" text="svg" pref="svg.show_alert" />
             <check id="tga_options_alert" text="tga" pref="tga.show_alert" />
+            <check id="css_options_alert" text="css" pref="css.show_alert" />
 	  </hbox>
           <separator horizontal="true" />
 	  <hbox>
diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
index 2708e3329..612f657bf 100644
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -132,6 +132,7 @@ set(file_formats
   file/pcx_format.cpp
   file/png_format.cpp
   file/svg_format.cpp
+  file/css_format.cpp
   file/tga_format.cpp)
 if(WITH_WEBP_SUPPORT)
   list(APPEND file_formats file/webp_format.cpp)
diff --git a/src/app/commands/cmd_options.cpp b/src/app/commands/cmd_options.cpp
index e19a110d5..b6a5d4f0b 100644
--- a/src/app/commands/cmd_options.cpp
+++ b/src/app/commands/cmd_options.cpp
@@ -900,6 +900,7 @@ private:
     gifOptionsAlert()->resetWithDefaultValue();
     jpegOptionsAlert()->resetWithDefaultValue();
     svgOptionsAlert()->resetWithDefaultValue();
+    cssOptionsAlert()->resetWithDefaultValue();
     tgaOptionsAlert()->resetWithDefaultValue();
   }
 
diff --git a/src/app/file/css_format.cpp b/src/app/file/css_format.cpp
new file mode 100644
index 000000000..09124496e
--- /dev/null
+++ b/src/app/file/css_format.cpp
@@ -0,0 +1,299 @@
+// Aseprite
+// Copyright (c) 2018-2019  Igara Studio S.A.
+//
+// This program is distributed under the terms of
+// the End-User License Agreement for Aseprite.
+//
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "app/console.h"
+#include "app/context.h"
+#include "app/doc.h"
+#include "app/file/file.h"
+#include "app/file/file_format.h"
+#include "app/file/format_options.h"
+#include "app/pref/preferences.h"
+#include "base/convert_to.h"
+#include "base/cfile.h"
+#include "base/file_handle.h"
+#include "base/string.h"
+#include "doc/doc.h"
+#include "ui/window.h"
+
+#include "css_options.xml.h"
+
+
+namespace app {
+
+using namespace base;
+
+class CssFormat : public FileFormat {
+  class CssOptions : public FormatOptions {
+  public:
+    CssOptions(): pixelScale(1), gutterSize(0), 
+          generateHtml(false), withVars(true) {}
+    int pixelScale;
+    int gutterSize;
+    bool generateHtml;
+    bool withVars;
+  };
+
+  const char* onGetName() const override {
+    return "css";
+  }
+
+  void onGetExtensions(base::paths& exts) const override {
+    exts.push_back("css");
+  }
+
+  dio::FileFormat onGetDioFormat() const override {
+    return dio::FileFormat::CSS_STYLE;
+  }
+
+  int onGetFlags() const override {
+    return
+      FILE_SUPPORT_SAVE |
+      FILE_SUPPORT_RGB |
+      FILE_SUPPORT_RGBA |
+      FILE_SUPPORT_GRAY |
+      FILE_SUPPORT_GRAYA |
+      FILE_SUPPORT_INDEXED |
+      FILE_SUPPORT_SEQUENCES |
+      FILE_SUPPORT_GET_FORMAT_OPTIONS |
+      FILE_SUPPORT_PALETTE_WITH_ALPHA;
+  }
+
+  bool onLoad(FileOp* fop) override;
+#ifdef ENABLE_SAVE
+  bool onSave(FileOp* fop) override;
+#endif
+  FormatOptionsPtr onAskUserForFormatOptions(FileOp* fop) override;
+};
+
+FileFormat *CreateCssFormat()
+{
+  return new CssFormat;
+}
+
+bool CssFormat::onLoad(FileOp *fop) { return false; }
+
+#ifdef ENABLE_SAVE
+
+bool CssFormat::onSave(FileOp *fop)
+{
+  const Image* image = fop->sequenceImage();
+  int x, y, c, r, g, b, a, alpha;
+  const auto css_options = std::static_pointer_cast<CssOptions>(fop->formatOptions());
+  FileHandle handle(open_file_with_exception_sync_on_close(fop->filename(), "wb"));
+  FILE* f = handle.get();
+  auto print_color = [f](int r, int g, int b, int a) {
+    if (a == 255) {
+      fprintf(f, "#%02X%02X%02X", r, g, b);
+    } else {
+      fprintf(f, "rgba(%d, %d, %d, %d)", r, g, b, a);
+    }
+  };
+  auto print_shadow_color = [f, css_options, print_color](int x, int y, int r,
+                                                          int g, int b, int a,
+                                                          bool comma = true) {
+    fprintf(f, comma?",\n":"\n");
+    if (css_options->withVars) {
+      fprintf(f, "\tcalc(%d*var(--shadow-mult)) calc(%d*var(--shadow-mult)) var(--blur) var(--spread) ",
+              x, y);
+    }
+    else {
+      int x_loc = x * (css_options->pixelScale + css_options->gutterSize);
+      int y_loc = y * (css_options->pixelScale + css_options->gutterSize);
+      fprintf(f, "%dpx %dpx ", x_loc, y_loc);
+    }
+    print_color(r, g, b, a);
+  };
+  auto print_shadow_index = [f, css_options](int x, int y, int i, bool comma=true) {
+    fprintf(f, comma?",\n":"\n");
+    fprintf(f, "\tcalc(%d*var(--shadow-mult)) calc(%d*var(--shadow-mult)) var(--blur) var(--spread) var(--color-%d)",
+            x, y, i);
+  };
+  if (css_options->withVars) {
+    fprintf(f, ":root {\n\t--blur: 0px;\n\t--spread: 0px;\n\t--pixel-size: %dpx;\n\t--gutter-size: %dpx;\n",
+            css_options->pixelScale, css_options->gutterSize);
+    fprintf(f, "\t--shadow-mult: calc(var(--gutter-size) + var(--pixel-size));\n");
+    if (image->pixelFormat() == IMAGE_INDEXED) {
+      for (y = 0; y < 256; y++) {
+        fop->sequenceGetColor(y, &r, &g, &b);
+        fop->sequenceGetAlpha(y, &a);
+        fprintf(f, "\t--color-%d: ", y);
+        print_color(r, g, b, a);
+        fprintf(f, ";\n");
+      }
+    }
+    fprintf(f, "}\n\n");
+  }
+
+  fprintf(f, ".pixel-art {\n");
+  fprintf(f, "\tposition: relative;\n");
+  fprintf(f, "\ttop: 0;\n");
+  fprintf(f, "\tleft: 0;\n");
+  if (css_options->withVars) {
+    fprintf(f, "\theight: var(--pixel-size);\n");
+    fprintf(f, "\twidth: var(--pixel-size);\n");
+  }
+  else {
+    fprintf(f, "\theight: %dpx;\n", css_options->pixelScale);
+    fprintf(f, "\twidth: %dpx;\n", css_options->pixelScale);
+  }
+  fprintf(f, "\tbox-shadow:\n");
+  int num_printed_pixels = 0;
+  switch (image->pixelFormat()) {
+    case IMAGE_RGB: {
+      for (y=0; y<image->height(); y++) {
+        for (x=0; x<image->width(); x++) {
+          c = get_pixel_fast<RgbTraits>(image, x, y);
+          alpha = rgba_geta(c);
+          if (alpha != 0x00) {
+            print_shadow_color(x, y, rgba_getr(c), rgba_getg(c), rgba_getb(c),
+                               alpha, num_printed_pixels>0);
+            num_printed_pixels ++;
+          }
+        }
+        fop->setProgress((float)y / (float)(image->height()));
+      }
+      break;
+    }
+    case IMAGE_GRAYSCALE: {
+      for (y=0; y<image->height(); y++) {
+        for (x=0; x<image->width(); x++) {
+          c = get_pixel_fast<GrayscaleTraits>(image, x, y);
+          auto v = graya_getv(c);
+          alpha = graya_geta(c);
+          if (alpha != 0x00) {
+            print_shadow_color(x, y, v, v, v, alpha, num_printed_pixels>0);
+            num_printed_pixels ++;
+          }
+        }
+        fop->setProgress((float)y / (float)(image->height()));
+      }
+      break;
+    }
+    case IMAGE_INDEXED: {
+      unsigned char image_palette[256][4];
+      for (y=0; !css_options->withVars && y<256; y++) {
+        fop->sequenceGetColor(y, &r, &g, &b);
+        image_palette[y][0] = r;
+        image_palette[y][1] = g;
+        image_palette[y][2] = b;
+        fop->sequenceGetAlpha(y, &a);
+        image_palette[y][3] = a;
+      }
+      color_t mask_color = -1;
+      if (fop->document()->sprite()->backgroundLayer() == NULL ||
+          !fop->document()->sprite()->backgroundLayer()->isVisible()) {
+        mask_color = fop->document()->sprite()->transparentColor();
+      }
+      for (y=0; y<image->height(); y++) {
+        for (x=0; x<image->width(); x++) {
+          c = get_pixel_fast<IndexedTraits>(image, x, y);
+          if (c != mask_color) {
+            if (css_options->withVars) {
+              print_shadow_index(x, y, c, num_printed_pixels>0);
+            }
+            else {
+              print_shadow_color(x, y,
+                     image_palette[c][0] & 0xff,
+                     image_palette[c][1] & 0xff,
+                     image_palette[c][2] & 0xff,
+                     image_palette[c][3] & 0xff,
+                     num_printed_pixels>0);
+            }
+            num_printed_pixels ++;
+          }
+        }
+        fop->setProgress((float)y / (float)(image->height()));
+      }
+      break;
+    }
+  }
+  fprintf(f, ";\n}\n");
+  if (ferror(f)) {
+    fop->setError("Error writing file.\n");
+    return false;
+  }
+  if (css_options->generateHtml) {
+    std::string html_filepath = fop->filename() + ".html";
+    FileHandle handle(open_file_with_exception_sync_on_close(html_filepath, "wb"));    
+    FILE* h = handle.get();
+    fprintf(h,
+            "<html><head><link rel=\"stylesheet\" media=\"all\" "
+            "href=\"%s\"></head><body><div "
+            "class=\"pixel-art\"></div></body></html>",
+            fop->filename().c_str());
+    if (ferror(h)) {
+      fop->setError("Error writing html file.\n");
+      return false;
+    }
+  }
+  return true;
+}
+
+#endif
+
+// Shows the CSS configuration dialog.
+FormatOptionsPtr CssFormat::onAskUserForFormatOptions(FileOp *fop)
+{
+  auto opts = fop->formatOptionsOfDocument<CssOptions>();
+
+#ifdef ENABLE_UI
+  if (fop->context() && fop->context()->isUIAvailable())
+  {
+    try
+    {
+      auto &pref = Preferences::instance();
+
+      if (pref.isSet(pref.css.pixelScale))
+        opts->pixelScale = pref.css.pixelScale();
+
+      if (pref.isSet(pref.css.withVars))
+        opts->withVars = pref.css.withVars();
+
+      if (pref.isSet(pref.css.generateHtml))
+        opts->generateHtml = pref.css.generateHtml();
+
+      if (pref.css.showAlert())
+      {
+        app::gen::CssOptions win;
+        win.pixelScale()->setTextf("%d", opts->pixelScale);
+        win.withVars()->setSelected(opts->withVars);
+        win.generateHtml()->setSelected(opts->generateHtml);
+        win.openWindowInForeground();
+
+        if (win.closer() == win.ok())
+        {
+          pref.css.showAlert(!win.dontShow()->isSelected());
+          pref.css.pixelScale((int)win.pixelScale()->textInt());
+          pref.css.withVars(win.withVars()->isSelected());
+          pref.css.generateHtml(win.generateHtml()->isSelected());
+
+          opts->generateHtml = pref.css.generateHtml();
+          opts->withVars = pref.css.withVars();
+          opts->pixelScale = pref.css.pixelScale();
+        }
+        else
+        {
+          opts.reset();
+        }
+      }
+    }
+    catch (std::exception &e)
+    {
+      Console::showException(e);
+      return std::shared_ptr<CssOptions>(nullptr);
+    }
+  }
+
+#endif
+  return opts;
+}
+
+} // namespace app
diff --git a/src/app/file/file_formats_manager.cpp b/src/app/file/file_formats_manager.cpp
index 143f5eae4..e93b2c0f8 100644
--- a/src/app/file/file_formats_manager.cpp
+++ b/src/app/file/file_formats_manager.cpp
@@ -30,6 +30,7 @@ extern FileFormat* CreatePcxFormat();
 extern FileFormat* CreatePngFormat();
 extern FileFormat* CreateSvgFormat();
 extern FileFormat* CreateTgaFormat();
+extern FileFormat* CreateCssFormat();
 
 #ifdef ASEPRITE_WITH_WEBP_SUPPORT
 extern FileFormat* CreateWebPFormat();
@@ -65,6 +66,7 @@ FileFormatsManager::FileFormatsManager()
   registerFormat(CreatePngFormat());
   registerFormat(CreateSvgFormat());
   registerFormat(CreateTgaFormat());
+  registerFormat(CreateCssFormat());
 
 #ifdef ASEPRITE_WITH_WEBP_SUPPORT
   registerFormat(CreateWebPFormat());
diff --git a/src/dio/detect_format.cpp b/src/dio/detect_format.cpp
index 2c975d779..65ed992ed 100644
--- a/src/dio/detect_format.cpp
+++ b/src/dio/detect_format.cpp
@@ -141,6 +141,9 @@ FileFormat detect_format_by_file_extension(const std::string& filename)
   if (ext == "tga")
     return FileFormat::TARGA_IMAGE;
 
+  if (ext == "css")
+    return FileFormat::CSS_STYLE;
+
   if (ext == "webp")
     return FileFormat::WEBP_ANIMATION;
 
diff --git a/src/dio/file_format.h b/src/dio/file_format.h
index 04baaea25..b8598644c 100644
--- a/src/dio/file_format.h
+++ b/src/dio/file_format.h
@@ -31,6 +31,7 @@ enum class FileFormat {
   SVG_IMAGE,
   TARGA_IMAGE,
   WEBP_ANIMATION,
+  CSS_STYLE,
 };
 
 } // namespace dio