Fix precision caps and rrect/ellipse effect precisions

Replaces all the complex precision caps with a single flag that says
whether "float" == fp32. Updates the ellipse and rrect effects to
use float coords, and use the scale workaround when float != fp32.

Bug: skia:7190
Change-Id: Ieccff9f38acd05e5cec78fe90d01a5da901a9307
Reviewed-on: https://skia-review.googlesource.com/70961
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

1 files changed, 3 insertions, 14 deletions

diff --git a/src/gpu/mtl/GrMtlCaps.mm b/src/gpu/mtl/GrMtlCaps.mm
index d431f0a1e1..2354b85e64 100644
--- a/src/gpu/mtl/GrMtlCaps.mm
+++ b/src/gpu/mtl/GrMtlCaps.mm
@@ -229,21 +229,10 @@ void GrMtlCaps::initShaderCaps() {
     shaderCaps->fTexelFetchSupport = false;
     shaderCaps->fVertexIDSupport = false;
     shaderCaps->fImageLoadStoreSupport = false;
-    shaderCaps->fShaderPrecisionVaries = false; // ???
 
-    // Metal uses IEEE float and half floats so using those values here.
-    for (int s = 0; s < kGrShaderTypeCount; ++s) {
-        auto& highp = shaderCaps->fFloatPrecisions[s][kHigh_GrSLPrecision];
-        highp.fLogRangeLow = highp.fLogRangeHigh = 127;
-        highp.fBits = 23;
-
-        auto& mediump = shaderCaps->fFloatPrecisions[s][kMedium_GrSLPrecision];
-        mediump.fLogRangeLow = mediump.fLogRangeHigh = 15;
-        mediump.fBits = 10;
-
-        shaderCaps->fFloatPrecisions[s][kLow_GrSLPrecision] = mediump;
-    }
-    shaderCaps->initSamplerPrecisionTable();
+    // Metal uses IEEE float and half floats so assuming those values here.
+    shaderCaps->fFloatIs32Bits = true;
+    shaderCaps->fHalfIs32Bits = false;
 
     shaderCaps->fMaxVertexSamplers =
     shaderCaps->fMaxFragmentSamplers = 16;