SkRTConf: reduce functionality to what we use, increase simplicity

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2212473002
DOCS_PREVIEW= https://skia.org/?cl=2212473002
CQ_INCLUDE_TRYBOTS=master.client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot

[mtklein]
TBR=reed@google.com
Only removing unused public API.

Review-Url: https://codereview.chromium.org/2212473002

2 files changed, 0 insertions, 270 deletions

diff --git a/site/dev/runtime/config.md b/site/dev/runtime/config.md
deleted file mode 100644
index fd31af75c5..0000000000
--- a/site/dev/runtime/config.md
+++ /dev/null
@@ -1,89 +0,0 @@
-Runtime Configuration Settings
-==============================
-
-Here is a (partial) list of Skia's runtime configuration settings:
-
-## Warning suppression:
-
-* configuration name: images.gif.suppressDecoderWarnings
-  environment variable: skia_images_gif_suppressDecoderWarnings
-  type: boolean
-  description: Suppress GIF warnings and errors when calling image decode
-               functions.  
-  default: true.
-
-* configuration name: images.jpeg.suppressDecoderWarnings
-  environment variable: skia_images_jpeg_suppressDecoderWarnings
-  type: boolean
-  description: Suppress most JPG warnings when calling decode functions.
-  default: false in debug, true otherwise.
-  
-* configuration name: images.jpeg.suppressDecoderErrors
-  environment variable: skia_images_jpeg_suppressDecoderErrors
-  type: boolean
-  description: Suppress most JPG error messages when decode function fails.
-  default: false in debug, true otherwise.
-
-*  configuration name: images.png.suppressDecoderWarnings
-  environment variable: skia_images_png_suppressDecoderWarnings
-  type: boolean
-  description: Suppress most PNG warnings when calling image decode functions.
-  default: false in debug, true otherwise.
-
-## Other:
-
-* configuration name: bitmap.filter
-  environment variable: skia_bitmap_filter
-  type: string
-  description: Which scanline bitmap filter to use \[mitchell, lanczos, hamming,
-               gaussian, triangle, box\] 
-  default: mitchell
-
-* configuration name: mask.filter.analyticNinePatch
-  environment variable: skia_mask_filter_analyticNinePatch
-  type: boolean
-  description: Use the faster analytic blur approach for ninepatch rects
-  default: \?
-
-* configuration name: gpu.deferContext
-  environment variable: skia_gpu_deferContext
-  type: boolean
-  description: Defers rendering in GrContext via GrInOrderDrawBuffer
-  default: true
-
-* configuration name: gpu.dumpFontCache
-  environment variable: skia_gpu_dumpFontCache
-  type: boolean
-  description: Dump the contents of the font cache before every purge
-  default: false
-
-* configuration name: bitmap.filter.highQualitySSE
-  environment variable: skia_bitmap_filter_highQualitySSE
-  type: boolean
-  description: Use SSE optimized version of high quality image filters
-  default: false
-
-## Use:
-
-These configuration values can be changed at runtime by including this in your
-program:
-
-<!--?prettify?-->
-~~~~
-#include "SkRTConf.h"
-/*...*/
-int main() { 
-    SK_CONF_SET( configuration_name, new_value );
-    /*...*/
-~~~~
-
-Or by setting the corresponding environment variable before starting the
-program. For example, in Bourne shell:
-
-<!--?prettify?-->
-~~~~
-#!/bin/sh
-export skia_environment_variable="new_value"
-your_program
-~~~~
-
diff --git a/site/dev/runtime/index.md b/site/dev/runtime/index.md
deleted file mode 100644
index 7c8246d23f..0000000000
--- a/site/dev/runtime/index.md
+++ /dev/null
@@ -1,181 +0,0 @@
-Runtime Configuration
-=====================
-
-Skia supports the configuration of various aspects of its behavior at runtime,
-allowing developers to enable\/disable features, or to experiment with numerical
-quantities without recompiling.
-
-## Enabling runtime configuration
-
-In order to use a runtime-configurable variable in your source, simply:
-
-<!--?prettify?-->
-~~~~
-#include "SkRTConf.h"
-~~~~
-
-## Declaring a runtime-configurable variable
-
-At file scope, declare your variable like so:
-
-<!--?prettify?-->
-~~~~
-SK_CONF_DECLARE( confType, varName, confName, defaultValue, description );
-~~~~
-
-For example, to declare a boolean variable called ` c_printShaders ` that can be
-changed at runtime, you would do something like
-
-<!--?prettify?-->
-~~~~
-SK_CONF_DECLARE( bool, c_printShaders, "gpu.printShaders", false, "print the
-                 source code of any internally generated GPU shaders" ); 
-~~~~
-
-It is safe to declare variables this way in header files; the variables will be
-declared as static, but since they are read\-only\-ish \(they can be changed
-through a special mechanism; see below\), this is safe.
-
-## Using a runtime-configurable variable
-
-The variables created by `SK_CONF_DECLARE` can be used in normal C\+\+ code as
-if they were regular contant variables. For example:
-
-<!--?prettify?-->
-~~~~
-if (c_printShaders) {
-    // actually print out the shaders
-}
-~~~~
-
-## Changing a runtime-configurable variable after launch
-
-If, for some reason, you want to change the value of a runtime-configurable
-variable after your program has started, you can do this with the `SK_CONF_SET`
-macro:
-
-<!--?prettify?-->
-~~~~
-SK_CONF_SET( "gpu.printShaders", false )
-~~~~
-
-Note that we're using the `confName` parameter to the declaration, not
-`varName`. This is because this configuration option may appear in multiple
-files \(especially if you declared it in a header!\), and we need to make sure
-to update all variables' values, not just the one that's locally visible to the
-file you are currently in.
-
-## Changing a runtime-configurable variable before launch
-
-This is the primary intended use of these variables. There are two ways that you
-can control the values of runtime-configurable variables at launch time: a
-skia.conf configuration file, or through the use of environment variables.
-
-### Using skia.conf
-
-The skia.conf file is a simple line-based configuration file containing
-key-value pairs. It supports python-style \# comments. For our example, we might
-see a configuration file that looks like:
-
-<!--?prettify?-->
-~~~~
-gpu.printShaders      true
-gpu.somethingElse     3.14159
-matrix.invertProperly false    # math is hard
-...
-~~~~
-
-*Note: boolean values may be set as 1, 0, true, or false. Other values will
-result in runtime errors.*
-
-If the skia library detects a skia.conf file at initialization time, it will
-parse it and override the default values of any declared configuration variables
-with the values found in the file.
-
-*Note: although it might appear that the configuration variables have a
-hierarchical naming scheme involving periods, that's just a convention I have
-adopted so that when all declared configuration variables are sorted
-alphabetically, they are roughly grouped by component.*
-
-## Using environment variables
-
-You can quickly override the value of one runtime-configurable variable using an
-environment variable equal to the variable's key with "skia." prepended. So, for
-example, one might run:
-
-<!--?prettify?-->
-~~~~
-prompt% skia.gpu.printShaders=true out/Debug/dm
-~~~~
-
-or
-
-<!--?prettify?-->
-~~~~
-prompt% export skia.gpu.printShaders=true
-prompt% out/Debug/dm
-~~~~
-
-On many shells, it is illegal to have a period in an environment variable name,
-so skia also supports underscores in place of the periods:
-
-<!--?prettify?-->
-~~~~
-prompt% skia_gpu_printShaders=true out/Debug/dm
-~~~~
-
-or
-
-<!--?prettify?-->
-~~~~
-prompt% export skia_gpu_printShaders=true`
-prompt% out/Debug/dm
-~~~~
-
-## Discovering all possible configuration variables
-
-As this system becomes more widely used in skia, there may be hundreds of
-configuration variables. What are they all? What are their defaults? What do
-they do?
-
-In order to find out, simply create a zero-length skia.conf file \(on unix,
-`touch skia.conf` will do the trick\). If skia detects a zero-length
-configuration file, it will overwrite it with a sorted list of all known
-configuration variables, their defaults, and their description strings. Each
-line will be commented out and have its value already equal to its default, so
-you can then edit this file to your liking.
-
-To trigger this behavior, call the function
-`skRTConfRegistry().possiblyDumpFile(); ` or simply use `SkAutoGraphics
-ag;`, which also validates your configuration and print out active non-default
-options.
-
-## Are these things enabled all the time?
-
-No, they are only enabled in builds where SK_DEBUG is defined. This includes both
-`Debug` and `Release_Developer` gyp BUILDTYPES. The `Release_Developer` build type
-has exactly the same build flags as `Release`, except it re-enables SK_DEBUG, which
-in turn enables runtime configuration behavior.
-Specifically:
-
-<!--?prettify?-->
-~~~~
-prompt% ninja -C BUILDTYPE=Release_Developer
-~~~~
-
-... wait a long time ...
-
-<!--?prettify?-->
-~~~~
-prompt % skia_gpu_printShaders=true out/Release_Developer/dm
-~~~~
-
-... enjoy ...
-
-## Known issues / limitations
-
-Lines in 'skia.conf', including comments, are limited to 1024 characters.
-Runtime configuration variables of type `char \* ` cannot currently have spaces
-in them.
-Runtime variables are only fully supported for `int`, `unsigned int`, `float`,
-`double`, `bool`, and `char \*`.