[Impeller] Add shader include with FlutterFragCoord for use by FragmentProgram (#114214)

packages/flutter/lib/src/material/shaders/ink_sparkle.frag

@@ -6,6 +6,8 @@
 
 precision highp float;
 
+#include <flutter/runtime_effect.glsl>
+
 // TODO(antrob): Put these in a more logical order (e.g. separate consts vs varying, etc)
 
 layout(location = 0) uniform vec4 u_color;
@@ -88,7 +90,7 @@ float turbulence(vec2 uv) {
 }
 
 void main() {
-  vec2 p = gl_FragCoord.xy;
+  vec2 p = FlutterFragCoord();
   vec2 uv = p * u_resolution_scale;
   vec2 density_uv = uv - mod(p, u_noise_scale);
   float radius = u_max_radius * u_radius_scale;

packages/flutter_tools/lib/src/build_system/targets/shader_compiler.dart

@@ -54,7 +54,7 @@ class DevelopmentShaderCompiler {
   void configureCompiler(TargetPlatform? platform, { required bool enableImpeller }) {
     switch (platform) {
       case TargetPlatform.ios:
-        _shaderTarget = enableImpeller ? ShaderTarget.impelleriOS : ShaderTarget.sksl;
+        _shaderTarget = ShaderTarget.impelleriOS;
         break;
       case TargetPlatform.android_arm64:
       case TargetPlatform.android_x64:
@@ -175,6 +175,8 @@ class ShaderCompiler {
       );
     }
 
+    final String shaderLibPath = _fs.path.join(_fs.path.dirname(impellerc.path), 'shader_lib');
+
     final List<String> cmd = <String>[
       impellerc.path,
       target.target,
@@ -186,6 +188,7 @@ class ShaderCompiler {
       '--input=${input.path}',
       '--input-type=frag',
       '--include=${input.parent.path}',
+      '--include=$shaderLibPath',
     ];
     final Process impellercProcess = await _processManager.start(cmd);
     final int code = await impellercProcess.exitCode;

packages/flutter_tools/test/general.shard/asset_bundle_test.dart

@@ -17,6 +17,8 @@ import 'package:flutter_tools/src/globals.dart' as globals;
 import '../src/common.dart';
 import '../src/context.dart';
 
+const String shaderLibDir = './shader_lib';
+
 void main() {
   group('AssetBundle.build', () {
     late FileSystem testFileSystem;
@@ -452,6 +454,7 @@ flutter:
             '--input=/$shaderPath',
             '--input-type=frag',
             '--include=/$assetsPath',
+            '--include=$shaderLibDir',
           ],
           onRun: () {
             fileSystem.file(outputPath).createSync(recursive: true);
@@ -498,6 +501,7 @@ flutter:
             '--input=/$shaderPath',
             '--input-type=frag',
             '--include=/$assetsPath',
+            '--include=$shaderLibDir',
           ],
           onRun: () {
             fileSystem.file(outputPath).createSync(recursive: true);
@@ -538,6 +542,7 @@ flutter:
             '--input=${fileSystem.path.join(materialDir.path, 'shaders', 'ink_sparkle.frag')}',
             '--input-type=frag',
             '--include=${fileSystem.path.join(materialDir.path, 'shaders')}',
+            '--include=$shaderLibDir',
           ],
           onRun: () {
             fileSystem.file(outputPath).createSync(recursive: true);

packages/flutter_tools/test/general.shard/build_system/targets/ios_test.dart

@@ -262,7 +262,8 @@ void main() {
         '--spirv=/App.framework/flutter_assets/shader.glsl.spirv',
         '--input=/shader.glsl',
         '--input-type=frag',
-        '--include=/'
+        '--include=/',
+        '--include=./shader_lib',
       ]),
       FakeCommand(command: <String>[
         'codesign',

packages/flutter_tools/test/general.shard/build_system/targets/shader_compiler_test.dart

@@ -16,6 +16,7 @@ import '../../../src/common.dart';
 import '../../../src/fake_process_manager.dart';
 
 const String fragDir = '/shaders';
+const String shaderLibDir = './shader_lib';
 const String fragPath = '/shaders/my_shader.frag';
 const String notFragPath = '/shaders/not_a_frag.file';
 const String outputSpirvPath = '/output/shaders/my_shader.frag.spirv';
@@ -50,6 +51,7 @@ void main() {
           '--input=$fragPath',
           '--input-type=frag',
           '--include=$fragDir',
+          '--include=$shaderLibDir',
         ],
         onRun: () {
           fileSystem.file(outputPath).createSync(recursive: true);
@@ -89,6 +91,7 @@ void main() {
           '--input=$fragPath',
           '--input-type=frag',
           '--include=$fragDir',
+          '--include=$shaderLibDir',
         ],
         onRun: () {
           fileSystem.file(outputPath).createSync(recursive: true);
@@ -126,6 +129,7 @@ void main() {
           '--input=$fragPath',
           '--input-type=frag',
           '--include=$fragDir',
+          '--include=$shaderLibDir',
         ],
         onRun: () {
           fileSystem.file(outputPath).createSync(recursive: true);
@@ -163,6 +167,7 @@ void main() {
           '--input=$notFragPath',
           '--input-type=frag',
           '--include=$fragDir',
+          '--include=$shaderLibDir',
         ],
         onRun: () {
           fileSystem.file(outputPath).createSync(recursive: true);
@@ -202,6 +207,7 @@ void main() {
           '--input=$notFragPath',
           '--input-type=frag',
           '--include=$fragDir',
+          '--include=$shaderLibDir',
         ],
         stdout: 'impellerc stdout',
         stderr: 'impellerc stderr',
@@ -243,6 +249,7 @@ void main() {
           '--input=$fragPath',
           '--input-type=frag',
           '--include=$fragDir',
+          '--include=$shaderLibDir',
         ],
         onRun: () {
           fileSystem.file('/.tmp_rand0/0.8255140718871702.temp.spirv').createSync();
@@ -287,6 +294,7 @@ void main() {
           '--input=$fragPath',
           '--input-type=frag',
           '--include=$fragDir',
+          '--include=$shaderLibDir',
         ],
         onRun: () {
           fileSystem.file('/.tmp_rand0/0.8255140718871702.temp.spirv').createSync();
@@ -332,6 +340,7 @@ void main() {
           '--input=$fragPath',
           '--input-type=frag',
           '--include=$fragDir',
+          '--include=$shaderLibDir',
         ],
         onRun: () {
           fileSystem.file('/.tmp_rand0/0.8255140718871702.temp.spirv').createSync();