Removing vertex attrib indices

src/gpu/effects/GrDashingEffect.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "GrDashingEffect.h"
 
 #include "../GrAARectRenderer.h"
 
-#include "effects/GrVertexEffect.h"
+#include "effects/GrGeometryProcessor.h"
 #include "gl/GrGLEffect.h"
-#include "gl/GrGLVertexEffect.h"
+#include "gl/GrGLGeometryProcessor.h"
 #include "gl/GrGLSL.h"
 #include "GrContext.h"
 #include "GrCoordTransform.h"
 #include "GrDrawTarget.h"
 #include "GrDrawTargetCaps.h"
 #include "GrEffect.h"
 #include "GrGpu.h"
 #include "GrStrokeInfo.h"
 #include "GrTBackendEffectFactory.h"
 #include "SkGr.h"
@@ skipping 36 matching lines @@
     return true;
 }
 
 namespace {
 
 struct DashLineVertex {
     SkPoint fPos;
     SkPoint fDashPos;
 };
 
+extern const GrVertexAttrib gDashLineNoAAVertexAttribs[] = {
+    { kVec2f_GrVertexAttribType, 0,                 kPosition_GrVertexAttribBinding }
+};
+
 extern const GrVertexAttrib gDashLineVertexAttribs[] = {
     { kVec2f_GrVertexAttribType, 0,                 kPosition_GrVertexAttribBinding },
     { kVec2f_GrVertexAttribType, sizeof(SkPoint),   kEffect_GrVertexAttribBinding },
 };
 
 };
 static void calc_dash_scaling(SkScalar* parallelScale, SkScalar* perpScale,
                             const SkMatrix& viewMatrix, const SkPoint pts[2]) {
     SkVector vecSrc = pts[1] - pts[0];
     SkScalar magSrc = vecSrc.length();
@@ skipping 257 matching lines @@
         SkPathEffect::DashInfo devInfo;
         devInfo.fPhase = devPhase;
         devInfo.fCount = 2;
         devInfo.fIntervals = devIntervals;
         GrEffectEdgeType edgeType= useAA ? kFillAA_GrEffectEdgeType :
             kFillBW_GrEffectEdgeType;
         bool isRoundCap = SkPaint::kRound_Cap == cap;
         GrDashingEffect::DashCap capType = isRoundCap ? GrDashingEffect::kRound_DashCap :
                                                         GrDashingEffect::kNonRound_DashCap;
         drawState->setGeometryProcessor(
-            GrDashingEffect::Create(edgeType, devInfo, strokeWidth, capType), 1)->unref();
+            GrDashingEffect::Create(edgeType, devInfo, strokeWidth, capType))->unref();
+
+        // Set up the vertex data for the line and start/end dashes
+        drawState->setVertexAttribs<gDashLineVertexAttribs>(SK_ARRAY_COUNT(gDashLineVertexAttribs),
+                                                            sizeof(DashLineVertex));
+    } else {
+        // Set up the vertex data for the line and start/end dashes
+        drawState->setVertexAttribs<gDashLineNoAAVertexAttribs>(
+                SK_ARRAY_COUNT(gDashLineNoAAVertexAttribs), sizeof(DashLineVertex));
     }
 
-    // Set up the vertex data for the line and start/end dashes
-    drawState->setVertexAttribs<gDashLineVertexAttribs>(SK_ARRAY_COUNT(gDashLineVertexAttribs),
-                                                        sizeof(DashLineVertex));
-
     int totalRectCnt = 0;
 
     totalRectCnt += !lineDone ? 1 : 0;
     totalRectCnt += hasStartRect ? 1 : 0;
     totalRectCnt += hasEndRect ? 1 : 0;
 
     GrDrawTarget::AutoReleaseGeometry geo(target, totalRectCnt * 4, 0);
     if (!geo.succeeded()) {
         GrPrintf("Failed to get space for vertices!\n");
         return false;
@@ skipping 41 matching lines @@
     }
 
     target->setIndexSourceToBuffer(gpu->getContext()->getQuadIndexBuffer());
     target->drawIndexedInstances(kTriangles_GrPrimitiveType, totalRectCnt, 4, 6);
     target->resetIndexSource();
     return true;
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
+const GrShaderVar kAttrCoord("aCoord",
+                             kVec2f_GrSLType,
+                             GrShaderVar::kAttribute_TypeModifier);
+
 class GLDashingCircleEffect;
 /*
  * This effect will draw a dotted line (defined as a dashed lined with round caps and no on
  * interval). The radius of the dots is given by the strokeWidth and the spacing by the DashInfo.
  * Both of the previous two parameters are in device space. This effect also requires the setting of
  * a vec2 vertex attribute for the the four corners of the bounding rect. This attribute is the
  * "dash position" of each vertex. In other words it is the vertex coords (in device space) if we
  * transform the line to be horizontal, with the start of line at the origin then shifted to the
  * right by half the off interval. The line then goes in the positive x direction.
  */
-class DashingCircleEffect : public GrVertexEffect {
+class DashingCircleEffect : public GrGeometryProcessor {
 public:
     typedef SkPathEffect::DashInfo DashInfo;
 
     static GrEffect* Create(GrEffectEdgeType edgeType, const DashInfo& info, SkScalar radius);
 
     virtual ~DashingCircleEffect();
 
     static const char* Name() { return "DashingCircleEffect"; }
 
     GrEffectEdgeType getEdgeType() const { return fEdgeType; }
@@ skipping 15 matching lines @@
 
     virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE;
 
     GrEffectEdgeType    fEdgeType;
     SkScalar            fIntervalLength;
     SkScalar            fRadius;
     SkScalar            fCenterX;
 
     GR_DECLARE_EFFECT_TEST;
 
-    typedef GrVertexEffect INHERITED;
+    typedef GrGeometryProcessor INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
-class GLDashingCircleEffect : public GrGLVertexEffect {
+class GLDashingCircleEffect : public GrGLGeometryProcessor {
 public:
     GLDashingCircleEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
 
     virtual void emitCode(GrGLFullProgramBuilder* builder,
                           const GrDrawEffect& drawEffect,
                           const GrEffectKey& key,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) SK_OVERRIDE;
 
     static inline void GenKey(const GrDrawEffect&, const GrGLCaps&, GrEffectKeyBuilder*);
 
     virtual void setData(const GrGLProgramDataManager&, const GrDrawEffect&) SK_OVERRIDE;
 
 private:
     GrGLProgramDataManager::UniformHandle fParamUniform;
     SkScalar                              fPrevRadius;
     SkScalar                              fPrevCenterX;
     SkScalar                              fPrevIntervalLength;
-    typedef GrGLVertexEffect INHERITED;
+    typedef GrGLGeometryProcessor INHERITED;
 };
 
 GLDashingCircleEffect::GLDashingCircleEffect(const GrBackendEffectFactory& factory,
                                              const GrDrawEffect& drawEffect)
     : INHERITED (factory) {
     fPrevRadius = SK_ScalarMin;
     fPrevCenterX = SK_ScalarMin;
     fPrevIntervalLength = SK_ScalarMax;
 }
 
@@ skipping 10 matching lines @@
     // the total interval length of the dash.
     fParamUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                        kVec3f_GrSLType,
                                        "params",
                                        &paramName);
 
     const char *vsCoordName, *fsCoordName;
     builder->addVarying(kVec2f_GrSLType, "Coord", &vsCoordName, &fsCoordName);
 
     GrGLVertexShaderBuilder* vsBuilder = builder->getVertexShaderBuilder();
-    const SkString* attr0Name =
-        vsBuilder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]);
-    vsBuilder->codeAppendf("\t%s = %s;\n", vsCoordName, attr0Name->c_str());
+    vsBuilder->codeAppendf("\t%s = %s;\n", vsCoordName, kAttrCoord.c_str());
 
     // transforms all points so that we can compare them to our test circle
     GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder();
     fsBuilder->codeAppendf("\t\tfloat xShifted = %s.x - floor(%s.x / %s.z) * %s.z;\n",
                            fsCoordName, fsCoordName, paramName, paramName);
     fsBuilder->codeAppendf("\t\tvec2 fragPosShifted = vec2(xShifted, %s.y);\n", fsCoordName);
     fsBuilder->codeAppendf("\t\tvec2 center = vec2(%s.y, 0.0);\n", paramName);
     fsBuilder->codeAppend("\t\tfloat dist = length(center - fragPosShifted);\n");
     if (GrEffectEdgeTypeIsAA(dce.getEdgeType())) {
         fsBuilder->codeAppendf("\t\tfloat diff = dist - %s.x;\n", paramName);
@@ skipping 49 matching lines @@
 
 DashingCircleEffect::DashingCircleEffect(GrEffectEdgeType edgeType, const DashInfo& info,
                                          SkScalar radius)
     : fEdgeType(edgeType) {
     SkScalar onLen = info.fIntervals[0];
     SkScalar offLen = info.fIntervals[1];
     fIntervalLength = onLen + offLen;
     fRadius = radius;
     fCenterX = SkScalarHalf(offLen);
 
-    this->addVertexAttrib(kVec2f_GrSLType);
+    this->addVertexAttrib(kAttrCoord);
 }
 
 bool DashingCircleEffect::onIsEqual(const GrEffect& other) const {
     const DashingCircleEffect& dce = CastEffect<DashingCircleEffect>(other);
     return (fEdgeType == dce.fEdgeType &&
             fIntervalLength == dce.fIntervalLength &&
             fRadius == dce.fRadius &&
             fCenterX == dce.fCenterX);
 }
 
@@ skipping 25 matching lines @@
 
 /*
  * This effect will draw a dashed line. The width of the dash is given by the strokeWidth and the
  * length and spacing by the DashInfo. Both of the previous two parameters are in device space.
  * This effect also requires the setting of a vec2 vertex attribute for the the four corners of the
  * bounding rect. This attribute is the "dash position" of each vertex. In other words it is the
  * vertex coords (in device space) if we transform the line to be horizontal, with the start of
  * line at the origin then shifted to the right by half the off interval. The line then goes in the
  * positive x direction.
  */
-class DashingLineEffect : public GrVertexEffect {
+class DashingLineEffect : public GrGeometryProcessor {
 public:
     typedef SkPathEffect::DashInfo DashInfo;
 
     static GrEffect* Create(GrEffectEdgeType edgeType, const DashInfo& info, SkScalar strokeWidth);
 
     virtual ~DashingLineEffect();
 
     static const char* Name() { return "DashingEffect"; }
 
     GrEffectEdgeType getEdgeType() const { return fEdgeType; }
@@ skipping 12 matching lines @@
     DashingLineEffect(GrEffectEdgeType edgeType, const DashInfo& info, SkScalar strokeWidth);
 
     virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE;
 
     GrEffectEdgeType    fEdgeType;
     SkRect              fRect;
     SkScalar            fIntervalLength;
 
     GR_DECLARE_EFFECT_TEST;
 
-    typedef GrVertexEffect INHERITED;
+    typedef GrGeometryProcessor INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
-class GLDashingLineEffect : public GrGLVertexEffect {
+class GLDashingLineEffect : public GrGLGeometryProcessor {
 public:
     GLDashingLineEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
 
     virtual void emitCode(GrGLFullProgramBuilder* builder,
                           const GrDrawEffect& drawEffect,
                           const GrEffectKey& key,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) SK_OVERRIDE;
 
     static inline void GenKey(const GrDrawEffect&, const GrGLCaps&, GrEffectKeyBuilder*);
 
     virtual void setData(const GrGLProgramDataManager&, const GrDrawEffect&) SK_OVERRIDE;
 
 private:
     GrGLProgramDataManager::UniformHandle fRectUniform;
     GrGLProgramDataManager::UniformHandle fIntervalUniform;
     SkRect                                fPrevRect;
     SkScalar                              fPrevIntervalLength;
-    typedef GrGLVertexEffect INHERITED;
+    typedef GrGLGeometryProcessor INHERITED;
 };
 
 GLDashingLineEffect::GLDashingLineEffect(const GrBackendEffectFactory& factory,
                                      const GrDrawEffect& drawEffect)
     : INHERITED (factory) {
     fPrevRect.fLeft = SK_ScalarNaN;
     fPrevIntervalLength = SK_ScalarMax;
 }
 
 void GLDashingLineEffect::emitCode(GrGLFullProgramBuilder* builder,
@@ skipping 14 matching lines @@
     const char *intervalName;
     // The interval uniform's refers to the total length of the interval (on + off)
     fIntervalUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                        kFloat_GrSLType,
                                        "interval",
                                        &intervalName);
 
     const char *vsCoordName, *fsCoordName;
     builder->addVarying(kVec2f_GrSLType, "Coord", &vsCoordName, &fsCoordName);
     GrGLVertexShaderBuilder* vsBuilder = builder->getVertexShaderBuilder();
-    const SkString* attr0Name =
-        vsBuilder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]);
-    vsBuilder->codeAppendf("\t%s = %s;\n", vsCoordName, attr0Name->c_str());
+    vsBuilder->codeAppendf("\t%s = %s;\n", vsCoordName, kAttrCoord.c_str());
 
     // transforms all points so that we can compare them to our test rect
     GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder();
     fsBuilder->codeAppendf("\t\tfloat xShifted = %s.x - floor(%s.x / %s) * %s;\n",
                            fsCoordName, fsCoordName, intervalName, intervalName);
     fsBuilder->codeAppendf("\t\tvec2 fragPosShifted = vec2(xShifted, %s.y);\n", fsCoordName);
     if (GrEffectEdgeTypeIsAA(de.getEdgeType())) {
         // The amount of coverage removed in x and y by the edges is computed as a pair of negative
         // numbers, xSub and ySub.
         fsBuilder->codeAppend("\t\tfloat xSub, ySub;\n");
@@ skipping 57 matching lines @@
 DashingLineEffect::DashingLineEffect(GrEffectEdgeType edgeType, const DashInfo& info,
                                      SkScalar strokeWidth)
     : fEdgeType(edgeType) {
     SkScalar onLen = info.fIntervals[0];
     SkScalar offLen = info.fIntervals[1];
     SkScalar halfOffLen = SkScalarHalf(offLen);
     SkScalar halfStroke = SkScalarHalf(strokeWidth);
     fIntervalLength = onLen + offLen;
     fRect.set(halfOffLen, -halfStroke, halfOffLen + onLen, halfStroke);
 
-    this->addVertexAttrib(kVec2f_GrSLType);
+    this->addVertexAttrib(kAttrCoord);
 }
 
 bool DashingLineEffect::onIsEqual(const GrEffect& other) const {
     const DashingLineEffect& de = CastEffect<DashingLineEffect>(other);
     return (fEdgeType == de.fEdgeType &&
             fRect == de.fRect &&
             fIntervalLength == de.fIntervalLength);
 }
 
 GR_DEFINE_EFFECT_TEST(DashingLineEffect);
@@ skipping 25 matching lines @@
     switch (cap) {
         case GrDashingEffect::kRound_DashCap:
             return DashingCircleEffect::Create(edgeType, info, SkScalarHalf(strokeWidth));
         case GrDashingEffect::kNonRound_DashCap:
             return DashingLineEffect::Create(edgeType, info, strokeWidth);
         default:
             SkFAIL("Unexpected dashed cap.");
     }
     return NULL;
 }