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

This reverts commit 05d5a13fea6246648de7e41358ed338d53c85ea2.

Reason for revert: looks like it broke filterfastbounds

Original change's description:
> Revert "Revert "Switched highp float to highfloat and mediump float to half.""
> 
> This reverts commit 1d816b92bb7cf2258007f3f74ffd143b89f25d01.
> 
> Bug: skia:
> Change-Id: I388b5e5e9bf619db48297a80c9a80c039f26c9f1
> Reviewed-on: https://skia-review.googlesource.com/46464
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

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

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: skia:
Change-Id: Iddf6aef2ab084aa73da7ceebdfc303a1d2b80cde
Reviewed-on: https://skia-review.googlesource.com/47441
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 10 insertions, 8 deletions

diff --git a/src/gpu/vk/GrVkCopyManager.cpp b/src/gpu/vk/GrVkCopyManager.cpp
index 7ab47e9cf0..2b54d37710 100644
--- a/src/gpu/vk/GrVkCopyManager.cpp
+++ b/src/gpu/vk/GrVkCopyManager.cpp
@@ -44,17 +44,17 @@ bool GrVkCopyManager::createCopyProgram(GrVkGpu* gpu) {
         "#extension GL_ARB_shading_language_420pack : enable\n"
 
         "layout(set = 0, binding = 0) uniform vertexUniformBuffer {"
-            "half4 uPosXform;"
-            "half4 uTexCoordXform;"
+            "mediump float4 uPosXform;"
+            "mediump float4 uTexCoordXform;"
         "};"
-        "layout(location = 0) in highfloat2 inPosition;"
-        "layout(location = 1) out half2 vTexCoord;"
+        "layout(location = 0) in highp float2 inPosition;"
+        "layout(location = 1) out mediump float2 vTexCoord;"
 
         "// Copy Program VS\n"
         "void main() {"
             "vTexCoord = inPosition * uTexCoordXform.xy + uTexCoordXform.zw;"
             "gl_Position.xy = inPosition * uPosXform.xy + uPosXform.zw;"
-            "gl_Position.zw = half2(0, 1);"
+            "gl_Position.zw = float2(0, 1);"
         "}"
     );
 
@@ -63,9 +63,11 @@ bool GrVkCopyManager::createCopyProgram(GrVkGpu* gpu) {
         "#extension GL_ARB_separate_shader_objects : enable\n"
         "#extension GL_ARB_shading_language_420pack : enable\n"
 
-        "layout(set = 1, binding = 0) uniform sampler2D uTextureSampler;"
-        "layout(location = 1) in half2 vTexCoord;"
-        "layout(location = 0, index = 0) out half4 fsColorOut;"
+        "precision mediump float;"
+
+        "layout(set = 1, binding = 0) uniform mediump sampler2D uTextureSampler;"
+        "layout(location = 1) in mediump float2 vTexCoord;"
+        "layout(location = 0, index = 0) out mediump float4 fsColorOut;"
 
         "// Copy Program FS\n"
         "void main() {"