Switch atlas clients over to using absolute texture coordinates

This is a prerequisite for being able to resize the atlas with impunity.

Change-Id: I509816c8d6f38fbc92fa39aeab303b42ab09f58b
Reviewed-on: https://skia-review.googlesource.com/37560
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

1 files changed, 10 insertions, 28 deletions

diff --git a/src/gpu/text/GrAtlasTextBlob_regenInOp.cpp b/src/gpu/text/GrAtlasTextBlob_regenInOp.cpp
index 3150988fdb..96f0080ec2 100644
--- a/src/gpu/text/GrAtlasTextBlob_regenInOp.cpp
+++ b/src/gpu/text/GrAtlasTextBlob_regenInOp.cpp
@@ -21,9 +21,8 @@
 template <bool regenPos, bool regenCol, bool regenTexCoords>
 inline void regen_vertices(intptr_t vertex, const GrGlyph* glyph, size_t vertexStride,
                            bool useDistanceFields, SkScalar transX, SkScalar transY,
-                           int32_t log2Width, int32_t log2Height,
                            GrColor color) {
-    int u0, v0, u1, v1;
+    uint16_t u0, v0, u1, v1;
     if (regenTexCoords) {
         SkASSERT(glyph);
         int width = glyph->fBounds.width();
@@ -40,20 +39,6 @@ inline void regen_vertices(intptr_t vertex, const GrGlyph* glyph, size_t vertexS
             u1 = u0 + width;
             v1 = v0 + height;
         }
-
-        // normalize
-        u0 *= 65535;
-        u0 >>= log2Width;
-        u1 *= 65535;
-        u1 >>= log2Width;
-        v0 *= 65535;
-        v0 >>= log2Height;
-        v1 *= 65535;
-        v1 >>= log2Height;
-        SkASSERT(u0 >= 0 && u0 <= 65535);
-        SkASSERT(u1 >= 0 && u1 <= 65535);
-        SkASSERT(v0 >= 0 && v0 <= 65535);
-        SkASSERT(v1 >= 0 && v1 <= 65535);
     }
 
     // This is a bit wonky, but sometimes we have LCD text, in which case we won't have color
@@ -75,8 +60,8 @@ inline void regen_vertices(intptr_t vertex, const GrGlyph* glyph, size_t vertexS
 
     if (regenTexCoords) {
         uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset);
-        textureCoords[0] = (uint16_t) u0;
-        textureCoords[1] = (uint16_t) v0;
+        textureCoords[0] = u0;
+        textureCoords[1] = v0;
     }
     vertex += vertexStride;
 
@@ -94,8 +79,8 @@ inline void regen_vertices(intptr_t vertex, const GrGlyph* glyph, size_t vertexS
 
     if (regenTexCoords) {
         uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset);
-        textureCoords[0] = (uint16_t)u0;
-        textureCoords[1] = (uint16_t)v1;
+        textureCoords[0] = u0;
+        textureCoords[1] = v1;
     }
     vertex += vertexStride;
 
@@ -113,8 +98,8 @@ inline void regen_vertices(intptr_t vertex, const GrGlyph* glyph, size_t vertexS
 
     if (regenTexCoords) {
         uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset);
-        textureCoords[0] = (uint16_t)u1;
-        textureCoords[1] = (uint16_t)v1;
+        textureCoords[0] = u1;
+        textureCoords[1] = v1;
     }
     vertex += vertexStride;
 
@@ -132,8 +117,8 @@ inline void regen_vertices(intptr_t vertex, const GrGlyph* glyph, size_t vertexS
 
     if (regenTexCoords) {
         uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset);
-        textureCoords[0] = (uint16_t)u1;
-        textureCoords[1] = (uint16_t)v0;
+        textureCoords[0] = u1;
+        textureCoords[1] = v0;
     }
 }
 
@@ -170,7 +155,6 @@ void GrAtlasTextBlob::regenInOp(GrDrawOp::Target* target, GrAtlasGlyphCache* fon
     bool brokenRun = false;
     for (int glyphIdx = 0; glyphIdx < glyphCount; glyphIdx++) {
         GrGlyph* glyph = nullptr;
-        int log2Width = 0, log2Height = 0;
         if (regenTexCoords) {
             size_t glyphOffset = glyphIdx + info->glyphStartIndex();
 
@@ -197,8 +181,6 @@ void GrAtlasTextBlob::regenInOp(GrDrawOp::Target* target, GrAtlasGlyphCache* fon
             }
             fontCache->addGlyphToBulkAndSetUseToken(info->bulkUseToken(), glyph,
                                                     target->nextDrawToken());
-            log2Width = fontCache->log2Width(info->maskFormat());
-            log2Height = fontCache->log2Height(info->maskFormat());
         }
 
         intptr_t vertex = reinterpret_cast<intptr_t>(fVertices);
@@ -206,7 +188,7 @@ void GrAtlasTextBlob::regenInOp(GrDrawOp::Target* target, GrAtlasGlyphCache* fon
         vertex += vertexStride * glyphIdx * GrAtlasTextOp::kVerticesPerGlyph;
         regen_vertices<regenPos, regenCol, regenTexCoords>(vertex, glyph, vertexStride,
                                                            info->drawAsDistanceFields(), transX,
-                                                           transY, log2Width, log2Height, color);
+                                                           transY, color);
         helper->incGlyphCount();
     }