Revert of Break LCD and Bitmap text dependency on hardcoded atlas values

src/gpu/effects/GrBitmapTextGeoProc.cpp

Index: src/gpu/effects/GrBitmapTextGeoProc.cpp
diff --git a/src/gpu/effects/GrBitmapTextGeoProc.cpp b/src/gpu/effects/GrBitmapTextGeoProc.cpp
index 9496dbffc33540c3d64d35e1112a28d3d8a524ca..a0350e99f5e40ebb4248f001b0bb1e53f6079827 100644
--- a/src/gpu/effects/GrBitmapTextGeoProc.cpp
+++ b/src/gpu/effects/GrBitmapTextGeoProc.cpp
@@ -28,19 +28,18 @@
         // emit attributes
         vsBuilder->emitAttributes(cte);
 
-        // compute numbers to be hardcoded to convert texture coordinates from int to float
-        SkASSERT(cte.numTextures() == 1);
-        GrTexture* atlas = cte.textureAccess(0).getTexture();
-        SkASSERT(atlas);
-        SkScalar recipWidth = 1.0f / atlas->width();
-        SkScalar recipHeight = 1.0f / atlas->height();
-
         GrGLVertToFrag v(kVec2f_GrSLType);
         pb->addVarying("TextureCoords", &v);
-        vsBuilder->codeAppendf("%s = vec2(%.*f, %.*f) * %s;", v.vsOut(),
-                               SK_FLT_DECIMAL_DIG, recipWidth,
-                               SK_FLT_DECIMAL_DIG, recipHeight,
-                               cte.inTextureCoords()->fName);
+        // this is only used with text, so our texture bounds always match the glyph atlas
+        if (cte.maskFormat() == kA8_GrMaskFormat) {
+            vsBuilder->codeAppendf("%s = vec2(" GR_FONT_ATLAS_A8_RECIP_WIDTH ", "
+                                   GR_FONT_ATLAS_RECIP_HEIGHT ")*%s;", v.vsOut(),
+                                   cte.inTextureCoords()->fName);
+        } else {
+            vsBuilder->codeAppendf("%s = vec2(" GR_FONT_ATLAS_RECIP_WIDTH ", "
+                                   GR_FONT_ATLAS_RECIP_HEIGHT ")*%s;", v.vsOut(),
+                                   cte.inTextureCoords()->fName);
+        }
 
         // Setup pass through color
         if (!cte.colorIgnored()) {
@@ -103,13 +102,6 @@
         key |= gp.colorIgnored() ? 0x2 : 0x0;
         key |= gp.maskFormat() << 3;
         b->add32(key);
-
-        // Currently we hardcode numbers to convert atlas coordinates to normalized floating point
-        SkASSERT(gp.numTextures() == 1);
-        GrTexture* atlas = gp.textureAccess(0).getTexture();
-        SkASSERT(atlas);
-        b->add32(atlas->width());
-        b->add32(atlas->height());
     }
 
 private: