add pipecanvas

src/pipe/SkPipeFormat.h

Index: src/pipe/SkPipeFormat.h
diff --git a/src/pipe/SkPipeFormat.h b/src/pipe/SkPipeFormat.h
new file mode 100644
index 0000000000000000000000000000000000000000..a4176265cc6c78e150ff18e00b1162c5b5904a49
--- /dev/null
+++ b/src/pipe/SkPipeFormat.h
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkPipeFormat_DEFINED
+#define SkPipeFormat_DEFINED
+
+#include "SkTypes.h"
+
+enum Verb {

[mtklein, 2016/08/04 12:50:38]

: uint8_t

?

[mtklein, 2016/08/04 12:50:38]

Should probably namespace all these symbols somehow, e.g. namespace SkPipe

[reed1, 2016/08/04 13:18:41]

Definitely, just going fast at the moment

+    kSave_Verb,
+    kRestore_Verb,
+    kConcat_Verb,
+    
+    kClipRect_Verb,
+    kClipRRect_Verb,
+    kClipPath_Verb,
+    kClipRegion_Verb,
+    
+    kDrawDRRect_Verb,
+    kDrawText_Verb,
+    kDrawPosText_Verb,
+    kDrawPosTextH_Verb,
+    kDrawTextOnPath_Verb,
+    kDrawTextBlob_Verb,
+    kDrawTextRSXform_Verb,
+    kDrawPatch_Verb,
+    kDrawPaint_Verb,
+    kDrawPoints_Verb,
+    kDrawRect_Verb,
+    kDrawPath_Verb,
+    kDrawOval_Verb,
+    kDrawRRect_Verb,
+    
+    kDrawImage_Verb,
+    kDrawImageRect_Verb,
+    kDrawImageNine_Verb,
+    
+    kDrawVertices_Verb,
+    
+    kDrawPicture_Verb,
+    kDrawAnnotation_Verb,
+
+    kLastVerb = kDrawAnnotation_Verb,
+};
+
+enum PaintUsage {
+    kText_PaintUsage        = 1 << 0,
+    kGeometry_PaintUsage    = 1 << 1,
+    kImage_PaintUsage       = 1 << 2,
+    kSaveLayer_PaintUsage   = 1 << 3,
+    kDrawPaint_PaintUsage   = 1 << 4,
+};
+
+// must sum to <= 32
+enum BitsPerField {
+    kFlags_BPF  = 16,
+    kHint_BPF   = 2,
+    kAlign_BPF  = 2,
+    kFilter_BPF = 2,
+    kCaps_BPF   = 2,
+    kJoins_BPF  = 2,
+};
+
+enum {
+    kTextSize_NonDef    = 1 << 0,
+    kTextScaleX_NonDef  = 1 << 1,
+    kTextSkewX_NonDef   = 1 << 2,
+    kStrokeWidth_NonDef = 1 << 3,
+    kStrokeMiter_NonDef = 1 << 4,
+    kColor_NonDef       = 1 << 5,
+    kTypeface_NonDef    = 1 << 6,
+    kPathEffect_NonDef  = 1 << 7,
+    kShader_NonDef      = 1 << 8,
+    kXfermode_NonDef    = 1 << 9,
+    kMaskFilter_NonDef  = 1 << 10,
+    kColorFilter_NonDef = 1 << 11,
+    kRasterizer_NonDef  = 1 << 12,
+    kImageFilter_NonDef = 1 << 13,
+};
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+static inline bool fits_in(int value, int bits) {
+    return value >= 0 && value < (1 << bits);
+}
+
+static inline void ASSERT_FITS_IN(int value, int bits) {
+    SkASSERT(fits_in(value, bits));
+}
+
+static inline uint32_t pack_verb(Verb verb, unsigned extra = 0) {
+    ASSERT_FITS_IN(verb, 8);
+    ASSERT_FITS_IN(extra, 24);
+    return ((uint32_t)verb << 24) | extra;
+}
+
+static inline Verb unpack_verb(uint32_t data) {
+    return (Verb)(data >> 24);
+}
+
+static inline unsigned unpack_verb_extra(uint32_t data) {
+    return data & 0xFFFFFF;
+}
+
+#endif