Revert "Switched highp float to highfloat and mediump float to half."

This reverts commit 88d99c63878c2d3d340120f0321676f72afcb4f0.

Reason for revert: Believed to be causing unit test failures in Chrome roll:

https://build.chromium.org/p/tryserver.chromium.android/builders/linux_android_rel_ng/builds/364433
https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Ftryserver.chromium.android%2Flinux_android_rel_ng%2F364433%2F%2B%2Frecipes%2Fsteps%2Fcontent_browsertests__with_patch__on_Android%2F0%2Flogs%2FWebRtcCaptureFromElementBrowserTest.VerifyCanvasWebGLCaptureColor%2F0

Original change's description:
> Switched highp float to highfloat and mediump float to half.
> 
> The ultimate goal is to end up with "float" and "half", but this
> intermediate step uses "highfloat" so that it is clear if I missed a
> "float" somewhere. Once this lands, a subsequent CL will switch all
> "highfloats" back to "floats".
> 
> Bug: skia:
> Change-Id: Ia13225c7a0a0a2901e07665891c473d2500ddcca
> Reviewed-on: https://skia-review.googlesource.com/31000
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>

TBR=bsalomon@google.com,csmartdalton@google.com,ethannicholas@google.com

Change-Id: I8bfa97547ac3920d433665f161d27df3f15c83aa
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/35705
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

3 files changed, 27 insertions, 24 deletions

diff --git a/bench/GLInstancedArraysBench.cpp b/bench/GLInstancedArraysBench.cpp
index a5348d5d3e..37d1f2c430 100644
--- a/bench/GLInstancedArraysBench.cpp
+++ b/bench/GLInstancedArraysBench.cpp
@@ -111,9 +111,9 @@ GrGLuint GLCpuPosInstancedArraysBench::setupShader(const GrGLContext* ctx) {
     const char* version = shaderCaps->versionDeclString();
 
     // setup vertex shader
-    GrShaderVar aPosition("a_position", kHalf2_GrSLType, GrShaderVar::kIn_TypeModifier);
-    GrShaderVar aColor("a_color", kHalf3_GrSLType, GrShaderVar::kIn_TypeModifier);
-    GrShaderVar oColor("o_color", kHalf3_GrSLType, GrShaderVar::kOut_TypeModifier);
+    GrShaderVar aPosition("a_position", kVec2f_GrSLType, GrShaderVar::kIn_TypeModifier);
+    GrShaderVar aColor("a_color", kVec3f_GrSLType, GrShaderVar::kIn_TypeModifier);
+    GrShaderVar oColor("o_color", kVec3f_GrSLType, GrShaderVar::kOut_TypeModifier);
 
     SkString vshaderTxt(version);
     aPosition.appendDecl(shaderCaps, &vshaderTxt);
@@ -126,13 +126,14 @@ GrGLuint GLCpuPosInstancedArraysBench::setupShader(const GrGLContext* ctx) {
     vshaderTxt.append(
             "void main()\n"
             "{\n"
-                "gl_Position = highfloat4(a_position, 0., 1.);\n"
+                "gl_Position = float4(a_position, 0., 1.);\n"
                 "o_color = a_color;\n"
             "}\n");
 
     // setup fragment shader
-    GrShaderVar oFragColor("o_FragColor", kHalf4_GrSLType, GrShaderVar::kOut_TypeModifier);
+    GrShaderVar oFragColor("o_FragColor", kVec4f_GrSLType, GrShaderVar::kOut_TypeModifier);
     SkString fshaderTxt(version);
+    GrGLSLAppendDefaultFloatPrecisionDeclaration(kMedium_GrSLPrecision, *shaderCaps, &fshaderTxt);
     oColor.setTypeModifier(GrShaderVar::kIn_TypeModifier);
     oColor.appendDecl(shaderCaps, &fshaderTxt);
     fshaderTxt.append(";\n");
@@ -149,7 +150,7 @@ GrGLuint GLCpuPosInstancedArraysBench::setupShader(const GrGLContext* ctx) {
     fshaderTxt.appendf(
             "void main()\n"
             "{\n"
-                "%s = highfloat4(o_color, 1.0);\n"
+                "%s = float4(o_color, 1.0);\n"
             "}\n", fsOutName);
 
     return CreateProgram(ctx, vshaderTxt.c_str(), fshaderTxt.c_str());
diff --git a/bench/GLVec4ScalarBench.cpp b/bench/GLVec4ScalarBench.cpp
index 413e766c07..fab397b220 100644
--- a/bench/GLVec4ScalarBench.cpp
+++ b/bench/GLVec4ScalarBench.cpp
@@ -101,10 +101,10 @@ GrGLuint GLVec4ScalarBench::setupShader(const GrGLContext* ctx) {
     // corner of the screen than the previous circle.
 
     // set up vertex shader; this is a trivial vertex shader that passes through position and color
-    GrShaderVar aPosition("a_position", kHalf2_GrSLType, GrShaderVar::kIn_TypeModifier);
-    GrShaderVar oPosition("o_position", kHalf2_GrSLType, GrShaderVar::kOut_TypeModifier);
-    GrShaderVar aColor("a_color", kHalf3_GrSLType, GrShaderVar::kIn_TypeModifier);
-    GrShaderVar oColor("o_color", kHalf3_GrSLType, GrShaderVar::kOut_TypeModifier);
+    GrShaderVar aPosition("a_position", kVec2f_GrSLType, GrShaderVar::kIn_TypeModifier);
+    GrShaderVar oPosition("o_position", kVec2f_GrSLType, GrShaderVar::kOut_TypeModifier);
+    GrShaderVar aColor("a_color", kVec3f_GrSLType, GrShaderVar::kIn_TypeModifier);
+    GrShaderVar oColor("o_color", kVec3f_GrSLType, GrShaderVar::kOut_TypeModifier);
 
     SkString vshaderTxt(version);
     aPosition.appendDecl(shaderCaps, &vshaderTxt);
@@ -119,7 +119,7 @@ GrGLuint GLVec4ScalarBench::setupShader(const GrGLContext* ctx) {
     vshaderTxt.append(
             "void main()\n"
             "{\n"
-            "    gl_Position = highfloat4(a_position, 0.0, 1.0);\n"
+            "    gl_Position = float4(a_position, 0.0, 1.0);\n"
             "    o_position = a_position;\n"
             "    o_color = a_color;\n"
             "}\n");
@@ -129,8 +129,9 @@ GrGLuint GLVec4ScalarBench::setupShader(const GrGLContext* ctx) {
     // coded center and compare that to some hard-coded circle radius to compute a coverage.
     // Then, this coverage is mixed with the coverage from the previous stage and passed to the
     // next stage.
-    GrShaderVar oFragColor("o_FragColor", kHalf4_GrSLType, GrShaderVar::kOut_TypeModifier);
+    GrShaderVar oFragColor("o_FragColor", kVec4f_GrSLType, GrShaderVar::kOut_TypeModifier);
     SkString fshaderTxt(version);
+    GrGLSLAppendDefaultFloatPrecisionDeclaration(kMedium_GrSLPrecision, *shaderCaps, &fshaderTxt);
     oPosition.setTypeModifier(GrShaderVar::kIn_TypeModifier);
     oPosition.appendDecl(shaderCaps, &fshaderTxt);
     fshaderTxt.append(";\n");
@@ -151,13 +152,13 @@ GrGLuint GLVec4ScalarBench::setupShader(const GrGLContext* ctx) {
     fshaderTxt.appendf(
             "void main()\n"
             "{\n"
-            "    half4 outputColor;\n"
+            "    float4 outputColor;\n"
             "    %s outputCoverage;\n"
-            "    outputColor = half4(%s, 1.0);\n"
+            "    outputColor = float4(%s, 1.0);\n"
             "    outputCoverage = %s;\n",
-            fCoverageSetup == kUseVec4_CoverageSetup ? "half4" : "half",
+            fCoverageSetup == kUseVec4_CoverageSetup ? "float4" : "float",
             oColor.getName().c_str(),
-            fCoverageSetup == kUseVec4_CoverageSetup ? "half4(1.0)" : "1.0"
+            fCoverageSetup == kUseVec4_CoverageSetup ? "float4(1.0)" : "1.0"
             );
 
     float radius = 1.0f;
@@ -166,13 +167,13 @@ GrGLuint GLVec4ScalarBench::setupShader(const GrGLContext* ctx) {
         float centerY = 1.0f - radius;
         fshaderTxt.appendf(
             "    {\n"
-            "        half d = length(%s - half2(%f, %f));\n"
-            "        half edgeAlpha = clamp(100.0 * (%f - d), 0.0, 1.0);\n"
+            "        float d = length(%s - float2(%f, %f));\n"
+            "        float edgeAlpha = clamp(100.0 * (%f - d), 0.0, 1.0);\n"
             "        outputCoverage = 0.5 * outputCoverage + 0.5 * %s;\n"
             "    }\n",
             oPosition.getName().c_str(), centerX, centerY,
             radius,
-            fCoverageSetup == kUseVec4_CoverageSetup ? "half4(edgeAlpha)" : "edgeAlpha"
+            fCoverageSetup == kUseVec4_CoverageSetup ? "float4(edgeAlpha)" : "edgeAlpha"
             );
         radius *= 0.8f;
     }
diff --git a/bench/GLVertexAttributesBench.cpp b/bench/GLVertexAttributesBench.cpp
index f10bd11392..3980a0be0c 100644
--- a/bench/GLVertexAttributesBench.cpp
+++ b/bench/GLVertexAttributesBench.cpp
@@ -69,7 +69,7 @@ GrGLuint GLVertexAttributesBench::setupShader(const GrGLContext* ctx, uint32_t a
     const char* version = shaderCaps->versionDeclString();
 
     // setup vertex shader
-    GrShaderVar aPosition("a_position", kHighFloat4_GrSLType, GrShaderVar::kIn_TypeModifier);
+    GrShaderVar aPosition("a_position", kVec4f_GrSLType, GrShaderVar::kIn_TypeModifier);
     SkTArray<GrShaderVar> aVars;
     SkTArray<GrShaderVar> oVars;
 
@@ -81,7 +81,7 @@ GrGLuint GLVertexAttributesBench::setupShader(const GrGLContext* ctx, uint32_t a
         SkString aname;
         aname.appendf("a_color_%d", i);
         aVars.push_back(GrShaderVar(aname.c_str(),
-                                    kHalf4_GrSLType,
+                                    kVec4f_GrSLType,
                                     GrShaderVar::kIn_TypeModifier));
         aVars.back().appendDecl(shaderCaps, &vshaderTxt);
         vshaderTxt.append(";\n");
@@ -92,7 +92,7 @@ GrGLuint GLVertexAttributesBench::setupShader(const GrGLContext* ctx, uint32_t a
         SkString oname;
         oname.appendf("o_color_%d", i);
         oVars.push_back(GrShaderVar(oname.c_str(),
-                                    kHalf4_GrSLType,
+                                    kVec4f_GrSLType,
                                     GrShaderVar::kOut_TypeModifier));
         oVars.back().appendDecl(shaderCaps, &vshaderTxt);
         vshaderTxt.append(";\n");
@@ -109,14 +109,15 @@ GrGLuint GLVertexAttributesBench::setupShader(const GrGLContext* ctx, uint32_t a
 
     // Passthrough position as a dummy
     for (uint32_t i = attribs; i < maxAttribs; i++) {
-        vshaderTxt.appendf("%s = highfloat4(0, 0, 0, 1);\n", oVars[i].c_str());
+        vshaderTxt.appendf("%s = float4(0, 0, 0, 1);\n", oVars[i].c_str());
     }
 
     vshaderTxt.append("}\n");
 
     // setup fragment shader
-    GrShaderVar oFragColor("o_FragColor", kHalf4_GrSLType, GrShaderVar::kOut_TypeModifier);
+    GrShaderVar oFragColor("o_FragColor", kVec4f_GrSLType, GrShaderVar::kOut_TypeModifier);
     SkString fshaderTxt(version);
+    GrGLSLAppendDefaultFloatPrecisionDeclaration(kMedium_GrSLPrecision, *shaderCaps, &fshaderTxt);
 
     const char* fsOutName;
     if (shaderCaps->mustDeclareFragmentShaderOutput()) {