Partial revert of r357449 to keep Flash 19.x working.

BUG=551093

Review URL: https://codereview.chromium.org/1416303007

Cr-Commit-Position: refs/heads/master@{#357968}

1 files changed, 261 insertions, 0 deletions

diff --git a/ppapi/api/dev/ppb_font_dev.idl b/ppapi/api/dev/ppb_font_dev.idl
new file mode 100644
index 0000000..d2051a0
--- /dev/null
+++ b/ppapi/api/dev/ppb_font_dev.idl
@@ -0,0 +1,261 @@
+/* Copyright (c) 2012 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/**
+ * This file defines the <code>PPB_Font_Dev</code> interface.
+ */
+label Chrome {
+  M14 = 0.6
+};
+
+[assert_size(4)]
+enum PP_FontFamily_Dev {
+  /**
+   * Uses the user's default web page font (normally either the default serif
+   * or sans serif font).
+   */
+  PP_FONTFAMILY_DEFAULT = 0,
+
+  /**
+   * These families will use the default web page font corresponding to the
+   * given family.
+   */
+  PP_FONTFAMILY_SERIF = 1,
+  PP_FONTFAMILY_SANSSERIF = 2,
+  PP_FONTFAMILY_MONOSPACE = 3
+};
+
+/**
+ * Specifies the font weight. Normally users will only use NORMAL or BOLD.
+ */
+[assert_size(4)]
+enum PP_FontWeight_Dev {
+  PP_FONTWEIGHT_100 = 0,
+  PP_FONTWEIGHT_200 = 1,
+  PP_FONTWEIGHT_300 = 2,
+  PP_FONTWEIGHT_400 = 3,
+  PP_FONTWEIGHT_500 = 4,
+  PP_FONTWEIGHT_600 = 5,
+  PP_FONTWEIGHT_700 = 6,
+  PP_FONTWEIGHT_800 = 7,
+  PP_FONTWEIGHT_900 = 8,
+  PP_FONTWEIGHT_NORMAL = PP_FONTWEIGHT_400,
+  PP_FONTWEIGHT_BOLD = PP_FONTWEIGHT_700
+};
+
+[assert_size(48)]
+struct PP_FontDescription_Dev {
+  /**
+   * Font face name as a string. This can also be an undefined var, in which
+   * case the generic family will be obeyed. If the face is not available on
+   * the system, the browser will attempt to do font fallback or pick a default
+   * font.
+   */
+  PP_Var face;
+
+  /**
+   * When Create()ing a font and the face is an undefined var, the family
+   * specifies the generic font family type to use. If the face is specified,
+   * this will be ignored.
+   *
+   * When Describe()ing a font, the family will be the value you passed in when
+   * the font was created. In other words, if you specify a face name, the
+   * family will not be updated to reflect whether the font name you requested
+   * is serif or sans serif.
+   */
+  PP_FontFamily_Dev family;
+
+  /**
+   * Size in pixels.
+   *
+   * You can specify 0 to get the default font size. The default font size
+   * may vary depending on the requested font. The typical example is that
+   * the user may have a different font size for the default monospace font to
+   * give it a similar optical size to the proportionally spaced fonts.
+   */
+  uint32_t size;
+
+  /**
+   * Normally you will use either PP_FONTWEIGHT_NORMAL or PP_FONTWEIGHT_BOLD.
+   */
+  PP_FontWeight_Dev weight;
+
+  PP_Bool italic;
+  PP_Bool small_caps;
+
+  /**
+   * Adjustment to apply to letter and word spacing, respectively. Initialize
+   * to 0 to get normal spacing. Negative values bring letters/words closer
+   * together, positive values separate them.
+   */
+  int32_t letter_spacing;
+  int32_t word_spacing;
+
+  /**
+   * Ensure that this struct is 48-bytes wide by padding the end.  In some
+   * compilers, PP_Var is 8-byte aligned, so those compilers align this struct
+   * on 8-byte boundaries as well and pad it to 16 bytes even without this
+   * padding attribute.  This padding makes its size consistent across
+   * compilers.
+   */
+  int32_t padding;
+};
+
+[assert_size(20)]
+struct PP_FontMetrics_Dev {
+  int32_t height;
+  int32_t ascent;
+  int32_t descent;
+  int32_t line_spacing;
+  int32_t x_height;
+};
+
+[assert_size(24)]
+struct PP_TextRun_Dev {
+  /**
+   * This var must either be a string or a null/undefined var (which will be
+   * treated as a 0-length string).
+   */
+  PP_Var text;
+
+  /**
+   * Set to PP_TRUE if the text is right-to-left.
+   *
+   * When <code>override_direction</code> is false, the browser will perform
+   * the Unicode Bidirectional Algorithm (http://unicode.org/reports/tr9/) on
+   * the text. The value of the <code>rtl</code> flag specifies the
+   * directionality of the surrounding environment. This means that Hebrew
+   * word will always display right to left, even if <code>rtl</code> is false.
+   *
+   * When <code>override_direction</code> is true, no autodetection will be done
+   * and <code>rtl</code> specifies the direction of the text.
+   *
+   * TODO(brettw) note that autodetection with rtl = true is currently
+   * unimplemented.
+   */
+  PP_Bool rtl;
+
+  /**
+   * Set to PP_TRUE to force the directionality of the text regardless of
+   * content.
+   *
+   * If this flag is set, the browser will skip autodetection of the content
+   * and will display all text in the direction specified by the
+   * <code>rtl</code> flag.
+   */
+  PP_Bool override_direction;
+};
+
+interface PPB_Font_Dev {
+  /**
+   * Returns a list of all available font families on the system. You can use
+   * this list to decide whether to Create() a font.
+   *
+   * The return value will be a single string with null characters delimiting
+   * the end of each font name. For example: "Arial\0Courier\0Times\0".
+   *
+   * Returns an undefined var on failure (this typically means you passed an
+   * invalid instance).
+   */
+  PP_Var GetFontFamilies(
+      [in] PP_Instance instance);
+
+  /**
+   * Returns a font which best matches the given description. The return value
+   * will have a non-zero ID on success, or zero on failure.
+   */
+  PP_Resource Create(
+      [in] PP_Instance instance,
+      [in] PP_FontDescription_Dev description);
+
+  /**
+   * Returns PP_TRUE if the given resource is a Font. Returns PP_FALSE if the
+   * resource is invalid or some type other than a Font.
+   */
+  PP_Bool IsFont(
+      [in] PP_Resource resource);
+
+  /**
+   * Loads the description and metrics of the font into the given structures.
+   * The description will be different than the description the font was
+   * created with since it will be filled with the real values from the font
+   * that was actually selected.
+   *
+   * The PP_Var in the description should be of type Void on input. On output,
+   * this will contain the string and will have a reference count of 1. The
+   * plugin is responsible for calling Release on this var.
+   *
+   * Returns PP_TRUE on success, PP_FALSE if the font is invalid or if the Var
+   * in the description isn't Null (to prevent leaks).
+   */
+  PP_Bool Describe(
+      [in] PP_Resource font,
+      [out] PP_FontDescription_Dev description,
+      [out] PP_FontMetrics_Dev metrics);
+
+  /**
+   * Draws the text to the image buffer.
+   *
+   * The given point represents the baseline of the left edge of the font,
+   * regardless of whether it is left-to-right or right-to-left (in the case of
+   * RTL text, this will actually represent the logical end of the text).
+   *
+   * The clip is optional and may be NULL. In this case, the text will be
+   * clipped to the image.
+   *
+   * The image_data_is_opaque flag indicates whether subpixel antialiasing can
+   * be performed, if it is supported. When the image below the text is
+   * opaque, subpixel antialiasing is supported and you should set this to
+   * PP_TRUE to pick up the user's default preferences. If your plugin is
+   * partially transparent, then subpixel antialiasing is not possible and
+   * grayscale antialiasing will be used instead (assuming the user has
+   * antialiasing enabled at all).
+   */
+  PP_Bool DrawTextAt(
+      [in] PP_Resource font,
+      [in] PP_Resource image_data,
+      [in] PP_TextRun_Dev text,
+      [in] PP_Point position,
+      [in] uint32_t color,
+      [in] PP_Rect clip,
+      [in] PP_Bool image_data_is_opaque);
+
+  /**
+   * Returns the width of the given string. If the font is invalid or the var
+   * isn't a valid string, this will return -1.
+   *
+   * Note that this function handles complex scripts such as Arabic, combining
+   * accents, etc. so that adding the width of substrings won't necessarily
+   * produce the correct width of the entire string.
+   *
+   * Returns -1 on failure.
+   */
+  int32_t MeasureText(
+      [in] PP_Resource font,
+      [in] PP_TextRun_Dev text);
+
+  /**
+   * Returns the character at the given pixel X position from the beginning of
+   * the string. This handles complex scripts such as Arabic, where characters
+   * may be combined or replaced depending on the context. Returns (uint32)-1
+   * on failure.
+   */
+  uint32_t CharacterOffsetForPixel(
+      [in] PP_Resource font,
+      [in] PP_TextRun_Dev text,
+      [in] int32_t pixel_position);
+
+  /**
+   * Returns the horizontal advance to the given character if the string was
+   * placed at the given position. This handles complex scripts such as Arabic,
+   * where characters may be combined or replaced depending on context. Returns
+   * -1 on error.
+   */
+  int32_t PixelOffsetForCharacter(
+      [in] PP_Resource font,
+      [in] PP_TextRun_Dev text,
+      [in] uint32_t char_offset);
+};
+