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Unified Diff: experimental/AndroidPathRenderer/AndroidPathRenderer.cpp

Issue 1160863006: delete experimental path renderers (Closed) Base URL: https://skia.googlesource.com/skia.git@map-buffer-option
Patch Set: Created 5 years, 7 months ago
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Index: experimental/AndroidPathRenderer/AndroidPathRenderer.cpp
diff --git a/experimental/AndroidPathRenderer/AndroidPathRenderer.cpp b/experimental/AndroidPathRenderer/AndroidPathRenderer.cpp
deleted file mode 100644
index ca9873cddb728f0218377b0bd8746dae55efdffb..0000000000000000000000000000000000000000
--- a/experimental/AndroidPathRenderer/AndroidPathRenderer.cpp
+++ /dev/null
@@ -1,729 +0,0 @@
-/*
- * Copyright 2012 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#define LOG_TAG "PathRenderer"
-#define LOG_NDEBUG 1
-#define ATRACE_TAG ATRACE_TAG_GRAPHICS
-
-#define VERTEX_DEBUG 0
-
-#include <SkPath.h>
-#include <SkStrokeRec.h>
-
-#include <stdlib.h>
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <SkTypes.h>
-#include <SkTraceEvent.h>
-#include <SkMatrix.h>
-#include <SkPoint.h>
-
-#ifdef VERBOSE
-#define ALOGV SkDebugf
-#else
-#define ALOGV(x, ...)
-#endif
-
-#include "AndroidPathRenderer.h"
-#include "Vertex.h"
-
-namespace android {
-namespace uirenderer {
-
-#define THRESHOLD 0.5f
-
-SkRect PathRenderer::ComputePathBounds(const SkPath& path, const SkPaint* paint) {
- SkRect bounds = path.getBounds();
- if (paint->getStyle() != SkPaint::kFill_Style) {
- float outset = paint->getStrokeWidth() * 0.5f;
- bounds.outset(outset, outset);
- }
- return bounds;
-}
-
-inline void computeInverseScales(const SkMatrix* transform, float &inverseScaleX, float& inverseScaleY) {
- if (transform && transform->getType() & (SkMatrix::kScale_Mask|SkMatrix::kAffine_Mask|SkMatrix::kPerspective_Mask)) {
- float m00 = transform->getScaleX();
- float m01 = transform->getSkewY();
- float m10 = transform->getSkewX();
- float m11 = transform->getScaleY();
- float scaleX = sk_float_sqrt(m00 * m00 + m01 * m01);
- float scaleY = sk_float_sqrt(m10 * m10 + m11 * m11);
- inverseScaleX = (scaleX != 0) ? (1.0f / scaleX) : 1.0f;
- inverseScaleY = (scaleY != 0) ? (1.0f / scaleY) : 1.0f;
- } else {
- inverseScaleX = 1.0f;
- inverseScaleY = 1.0f;
- }
-}
-
-inline void copyVertex(Vertex* destPtr, const Vertex* srcPtr) {
- Vertex::set(destPtr, srcPtr->position[0], srcPtr->position[1]);
-}
-
-inline void copyAlphaVertex(AlphaVertex* destPtr, const AlphaVertex* srcPtr) {
- AlphaVertex::set(destPtr, srcPtr->position[0], srcPtr->position[1], srcPtr->alpha);
-}
-
-/**
- * Produces a pseudo-normal for a vertex, given the normals of the two incoming lines. If the offset
- * from each vertex in a perimeter is calculated, the resultant lines connecting the offset vertices
- * will be offset by 1.0
- *
- * Note that we can't add and normalize the two vectors, that would result in a rectangle having an
- * offset of (sqrt(2)/2, sqrt(2)/2) at each corner, instead of (1, 1)
- *
- * NOTE: assumes angles between normals 90 degrees or less
- */
-inline SkVector totalOffsetFromNormals(const SkVector& normalA, const SkVector& normalB) {
- SkVector pseudoNormal = normalA + normalB;
- pseudoNormal.scale(1.0f / (1.0f + sk_float_abs(normalA.dot(normalB))));
- return pseudoNormal;
-}
-
-inline void scaleOffsetForStrokeWidth(SkVector& offset, float halfStrokeWidth,
- float inverseScaleX, float inverseScaleY) {
- if (halfStrokeWidth == 0.0f) {
- // hairline - compensate for scale
- offset.fX *= 0.5f * inverseScaleX;
- offset.fY *= 0.5f * inverseScaleY;
- } else {
- offset.scale(halfStrokeWidth);
- }
-}
-
-static void getFillVerticesFromPerimeter(const SkTArray<Vertex, true>& perimeter, VertexBuffer* vertexBuffer) {
- Vertex* buffer = vertexBuffer->alloc<Vertex>(perimeter.count());
-
- int currentIndex = 0;
- // zig zag between all previous points on the inside of the hull to create a
- // triangle strip that fills the hull
- int srcAindex = 0;
- int srcBindex = perimeter.count() - 1;
- while (srcAindex <= srcBindex) {
- copyVertex(&buffer[currentIndex++], &perimeter[srcAindex]);
- if (srcAindex == srcBindex) break;
- copyVertex(&buffer[currentIndex++], &perimeter[srcBindex]);
- srcAindex++;
- srcBindex--;
- }
-}
-
-static void getStrokeVerticesFromPerimeter(const SkTArray<Vertex, true>& perimeter, float halfStrokeWidth,
- VertexBuffer* vertexBuffer, float inverseScaleX, float inverseScaleY) {
- Vertex* buffer = vertexBuffer->alloc<Vertex>(perimeter.count() * 2 + 2);
-
- int currentIndex = 0;
- const Vertex* last = &(perimeter[perimeter.count() - 1]);
- const Vertex* current = &(perimeter[0]);
- SkVector lastNormal;
- lastNormal.set(current->position[1] - last->position[1],
- last->position[0] - current->position[0]);
- lastNormal.normalize();
- for (int i = 0; i < perimeter.count(); i++) {
- const Vertex* next = &(perimeter[i + 1 >= perimeter.count() ? 0 : i + 1]);
- SkVector nextNormal;
- nextNormal.set(next->position[1] - current->position[1],
- current->position[0] - next->position[0]);
- nextNormal.normalize();
-
- SkVector totalOffset = totalOffsetFromNormals(lastNormal, nextNormal);
- scaleOffsetForStrokeWidth(totalOffset, halfStrokeWidth, inverseScaleX, inverseScaleY);
-
- Vertex::set(&buffer[currentIndex++],
- current->position[0] + totalOffset.fX,
- current->position[1] + totalOffset.fY);
-
- Vertex::set(&buffer[currentIndex++],
- current->position[0] - totalOffset.fX,
- current->position[1] - totalOffset.fY);
-
- last = current;
- current = next;
- lastNormal = nextNormal;
- }
-
- // wrap around to beginning
- copyVertex(&buffer[currentIndex++], &buffer[0]);
- copyVertex(&buffer[currentIndex++], &buffer[1]);
-}
-
-static void getStrokeVerticesFromUnclosedVertices(const SkTArray<Vertex, true>& vertices, float halfStrokeWidth,
- VertexBuffer* vertexBuffer, float inverseScaleX, float inverseScaleY) {
- Vertex* buffer = vertexBuffer->alloc<Vertex>(vertices.count() * 2);
-
- int currentIndex = 0;
- const Vertex* current = &(vertices[0]);
- SkVector lastNormal;
- for (int i = 0; i < vertices.count() - 1; i++) {
- const Vertex* next = &(vertices[i + 1]);
- SkVector nextNormal;
- nextNormal.set(next->position[1] - current->position[1],
- current->position[0] - next->position[0]);
- nextNormal.normalize();
-
- SkVector totalOffset;
- if (i == 0) {
- totalOffset = nextNormal;
- } else {
- totalOffset = totalOffsetFromNormals(lastNormal, nextNormal);
- }
- scaleOffsetForStrokeWidth(totalOffset, halfStrokeWidth, inverseScaleX, inverseScaleY);
-
- Vertex::set(&buffer[currentIndex++],
- current->position[0] + totalOffset.fX,
- current->position[1] + totalOffset.fY);
-
- Vertex::set(&buffer[currentIndex++],
- current->position[0] - totalOffset.fX,
- current->position[1] - totalOffset.fY);
-
- current = next;
- lastNormal = nextNormal;
- }
-
- SkVector totalOffset = lastNormal;
- scaleOffsetForStrokeWidth(totalOffset, halfStrokeWidth, inverseScaleX, inverseScaleY);
-
- Vertex::set(&buffer[currentIndex++],
- current->position[0] + totalOffset.fX,
- current->position[1] + totalOffset.fY);
- Vertex::set(&buffer[currentIndex++],
- current->position[0] - totalOffset.fX,
- current->position[1] - totalOffset.fY);
-#if VERTEX_DEBUG
- for (unsigned int i = 0; i < vertexBuffer.getSize(); i++) {
- SkDebugf("point at %f %f", buffer[i].position[0], buffer[i].position[1]);
- }
-#endif
-}
-
-static void getFillVerticesFromPerimeterAA(const SkTArray<Vertex, true>& perimeter, VertexBuffer* vertexBuffer,
- float inverseScaleX, float inverseScaleY) {
- AlphaVertex* buffer = vertexBuffer->alloc<AlphaVertex>(perimeter.count() * 3 + 2);
-
- // generate alpha points - fill Alpha vertex gaps in between each point with
- // alpha 0 vertex, offset by a scaled normal.
- int currentIndex = 0;
- const Vertex* last = &(perimeter[perimeter.count() - 1]);
- const Vertex* current = &(perimeter[0]);
- SkVector lastNormal;
- lastNormal.set(current->position[1] - last->position[1],
- last->position[0] - current->position[0]);
- lastNormal.normalize();
- for (int i = 0; i < perimeter.count(); i++) {
- const Vertex* next = &(perimeter[i + 1 >= perimeter.count() ? 0 : i + 1]);
- SkVector nextNormal;
- nextNormal.set(next->position[1] - current->position[1],
- current->position[0] - next->position[0]);
- nextNormal.normalize();
-
- // AA point offset from original point is that point's normal, such that each side is offset
- // by .5 pixels
- SkVector totalOffset = totalOffsetFromNormals(lastNormal, nextNormal);
- totalOffset.fX *= 0.5f * inverseScaleX;
- totalOffset.fY *= 0.5f * inverseScaleY;
-
- AlphaVertex::set(&buffer[currentIndex++],
- current->position[0] + totalOffset.fX,
- current->position[1] + totalOffset.fY,
- 0.0f);
- AlphaVertex::set(&buffer[currentIndex++],
- current->position[0] - totalOffset.fX,
- current->position[1] - totalOffset.fY,
- 1.0f);
-
- last = current;
- current = next;
- lastNormal = nextNormal;
- }
-
- // wrap around to beginning
- copyAlphaVertex(&buffer[currentIndex++], &buffer[0]);
- copyAlphaVertex(&buffer[currentIndex++], &buffer[1]);
-
- // zig zag between all previous points on the inside of the hull to create a
- // triangle strip that fills the hull, repeating the first inner point to
- // create degenerate tris to start inside path
- int srcAindex = 0;
- int srcBindex = perimeter.count() - 1;
- while (srcAindex <= srcBindex) {
- copyAlphaVertex(&buffer[currentIndex++], &buffer[srcAindex * 2 + 1]);
- if (srcAindex == srcBindex) break;
- copyAlphaVertex(&buffer[currentIndex++], &buffer[srcBindex * 2 + 1]);
- srcAindex++;
- srcBindex--;
- }
-
-#if VERTEX_DEBUG
- for (unsigned int i = 0; i < vertexBuffer.getSize(); i++) {
- SkDebugf("point at %f %f, alpha %f", buffer[i].position[0], buffer[i].position[1], buffer[i].alpha);
- }
-#endif
-}
-
-
-static void getStrokeVerticesFromUnclosedVerticesAA(const SkTArray<Vertex, true>& vertices, float halfStrokeWidth,
- VertexBuffer* vertexBuffer, float inverseScaleX, float inverseScaleY) {
- AlphaVertex* buffer = vertexBuffer->alloc<AlphaVertex>(6 * vertices.count() + 2);
-
- // avoid lines smaller than hairline since they break triangle based sampling. instead reducing
- // alpha value (TODO: support different X/Y scale)
- float maxAlpha = 1.0f;
- if (halfStrokeWidth != 0 && inverseScaleX == inverseScaleY &&
- halfStrokeWidth * inverseScaleX < 0.5f) {
- maxAlpha *= (2 * halfStrokeWidth) / inverseScaleX;
- halfStrokeWidth = 0.0f;
- }
-
- // there is no outer/inner here, using them for consistency with below approach
- int offset = 2 * (vertices.count() - 2);
- int currentAAOuterIndex = 2;
- int currentAAInnerIndex = 2 * offset + 5; // reversed
- int currentStrokeIndex = currentAAInnerIndex + 7;
-
- const Vertex* last = &(vertices[0]);
- const Vertex* current = &(vertices[1]);
- SkVector lastNormal;
- lastNormal.set(current->position[1] - last->position[1],
- last->position[0] - current->position[0]);
- lastNormal.normalize();
-
- {
- // start cap
- SkVector totalOffset = lastNormal;
- SkVector AAOffset = totalOffset;
- AAOffset.fX *= 0.5f * inverseScaleX;
- AAOffset.fY *= 0.5f * inverseScaleY;
-
- SkVector innerOffset = totalOffset;
- scaleOffsetForStrokeWidth(innerOffset, halfStrokeWidth, inverseScaleX, inverseScaleY);
- SkVector outerOffset = innerOffset + AAOffset;
- innerOffset -= AAOffset;
-
- // TODO: support square cap by changing this offset to incorporate halfStrokeWidth
- SkVector capAAOffset;
- capAAOffset.set(AAOffset.fY, -AAOffset.fX);
- AlphaVertex::set(&buffer[0],
- last->position[0] + outerOffset.fX + capAAOffset.fX,
- last->position[1] + outerOffset.fY + capAAOffset.fY,
- 0.0f);
- AlphaVertex::set(&buffer[1],
- last->position[0] + innerOffset.fX - capAAOffset.fX,
- last->position[1] + innerOffset.fY - capAAOffset.fY,
- maxAlpha);
-
- AlphaVertex::set(&buffer[2 * offset + 6],
- last->position[0] - outerOffset.fX + capAAOffset.fX,
- last->position[1] - outerOffset.fY + capAAOffset.fY,
- 0.0f);
- AlphaVertex::set(&buffer[2 * offset + 7],
- last->position[0] - innerOffset.fX - capAAOffset.fX,
- last->position[1] - innerOffset.fY - capAAOffset.fY,
- maxAlpha);
- copyAlphaVertex(&buffer[2 * offset + 8], &buffer[0]);
- copyAlphaVertex(&buffer[2 * offset + 9], &buffer[1]);
- copyAlphaVertex(&buffer[2 * offset + 10], &buffer[1]); // degenerate tris (the only two!)
- copyAlphaVertex(&buffer[2 * offset + 11], &buffer[2 * offset + 7]);
- }
-
- for (int i = 1; i < vertices.count() - 1; i++) {
- const Vertex* next = &(vertices[i + 1]);
- SkVector nextNormal;
- nextNormal.set(next->position[1] - current->position[1],
- current->position[0] - next->position[0]);
- nextNormal.normalize();
-
- SkVector totalOffset = totalOffsetFromNormals(lastNormal, nextNormal);
- SkVector AAOffset = totalOffset;
- AAOffset.fX *= 0.5f * inverseScaleX;
- AAOffset.fY *= 0.5f * inverseScaleY;
-
- SkVector innerOffset = totalOffset;
- scaleOffsetForStrokeWidth(innerOffset, halfStrokeWidth, inverseScaleX, inverseScaleY);
- SkVector outerOffset = innerOffset + AAOffset;
- innerOffset -= AAOffset;
-
- AlphaVertex::set(&buffer[currentAAOuterIndex++],
- current->position[0] + outerOffset.fX,
- current->position[1] + outerOffset.fY,
- 0.0f);
- AlphaVertex::set(&buffer[currentAAOuterIndex++],
- current->position[0] + innerOffset.fX,
- current->position[1] + innerOffset.fY,
- maxAlpha);
-
- AlphaVertex::set(&buffer[currentStrokeIndex++],
- current->position[0] + innerOffset.fX,
- current->position[1] + innerOffset.fY,
- maxAlpha);
- AlphaVertex::set(&buffer[currentStrokeIndex++],
- current->position[0] - innerOffset.fX,
- current->position[1] - innerOffset.fY,
- maxAlpha);
-
- AlphaVertex::set(&buffer[currentAAInnerIndex--],
- current->position[0] - innerOffset.fX,
- current->position[1] - innerOffset.fY,
- maxAlpha);
- AlphaVertex::set(&buffer[currentAAInnerIndex--],
- current->position[0] - outerOffset.fX,
- current->position[1] - outerOffset.fY,
- 0.0f);
-
- last = current;
- current = next;
- lastNormal = nextNormal;
- }
-
- {
- // end cap
- SkVector totalOffset = lastNormal;
- SkVector AAOffset = totalOffset;
- AAOffset.fX *= 0.5f * inverseScaleX;
- AAOffset.fY *= 0.5f * inverseScaleY;
-
- SkVector innerOffset = totalOffset;
- scaleOffsetForStrokeWidth(innerOffset, halfStrokeWidth, inverseScaleX, inverseScaleY);
- SkVector outerOffset = innerOffset + AAOffset;
- innerOffset -= AAOffset;
-
- // TODO: support square cap by changing this offset to incorporate halfStrokeWidth
- SkVector capAAOffset;
- capAAOffset.set(-AAOffset.fY, AAOffset.fX);
-
- AlphaVertex::set(&buffer[offset + 2],
- current->position[0] + outerOffset.fX + capAAOffset.fX,
- current->position[1] + outerOffset.fY + capAAOffset.fY,
- 0.0f);
- AlphaVertex::set(&buffer[offset + 3],
- current->position[0] + innerOffset.fX - capAAOffset.fX,
- current->position[1] + innerOffset.fY - capAAOffset.fY,
- maxAlpha);
-
- AlphaVertex::set(&buffer[offset + 4],
- current->position[0] - outerOffset.fX + capAAOffset.fX,
- current->position[1] - outerOffset.fY + capAAOffset.fY,
- 0.0f);
- AlphaVertex::set(&buffer[offset + 5],
- current->position[0] - innerOffset.fX - capAAOffset.fX,
- current->position[1] - innerOffset.fY - capAAOffset.fY,
- maxAlpha);
-
- copyAlphaVertex(&buffer[vertexBuffer->getSize() - 2], &buffer[offset + 3]);
- copyAlphaVertex(&buffer[vertexBuffer->getSize() - 1], &buffer[offset + 5]);
- }
-
-#if VERTEX_DEBUG
- for (unsigned int i = 0; i < vertexBuffer.getSize(); i++) {
- SkDebugf("point at %f %f, alpha %f", buffer[i].position[0], buffer[i].position[1], buffer[i].alpha);
- }
-#endif
-}
-
-
-static void getStrokeVerticesFromPerimeterAA(const SkTArray<Vertex, true>& perimeter, float halfStrokeWidth,
- VertexBuffer* vertexBuffer, float inverseScaleX, float inverseScaleY) {
- AlphaVertex* buffer = vertexBuffer->alloc<AlphaVertex>(6 * perimeter.count() + 8);
-
- // avoid lines smaller than hairline since they break triangle based sampling. instead reducing
- // alpha value (TODO: support different X/Y scale)
- float maxAlpha = 1.0f;
- if (halfStrokeWidth != 0 && inverseScaleX == inverseScaleY &&
- halfStrokeWidth * inverseScaleX < 0.5f) {
- maxAlpha *= (2 * halfStrokeWidth) / inverseScaleX;
- halfStrokeWidth = 0.0f;
- }
-
- int offset = 2 * perimeter.count() + 3;
- int currentAAOuterIndex = 0;
- int currentStrokeIndex = offset;
- int currentAAInnerIndex = offset * 2;
-
- const Vertex* last = &(perimeter[perimeter.count() - 1]);
- const Vertex* current = &(perimeter[0]);
- SkVector lastNormal;
- lastNormal.set(current->position[1] - last->position[1],
- last->position[0] - current->position[0]);
- lastNormal.normalize();
- for (int i = 0; i < perimeter.count(); i++) {
- const Vertex* next = &(perimeter[i + 1 >= perimeter.count() ? 0 : i + 1]);
- SkVector nextNormal;
- nextNormal.set(next->position[1] - current->position[1],
- current->position[0] - next->position[0]);
- nextNormal.normalize();
-
- SkVector totalOffset = totalOffsetFromNormals(lastNormal, nextNormal);
- SkVector AAOffset = totalOffset;
- AAOffset.fX *= 0.5f * inverseScaleX;
- AAOffset.fY *= 0.5f * inverseScaleY;
-
- SkVector innerOffset = totalOffset;
- scaleOffsetForStrokeWidth(innerOffset, halfStrokeWidth, inverseScaleX, inverseScaleY);
- SkVector outerOffset = innerOffset + AAOffset;
- innerOffset -= AAOffset;
-
- AlphaVertex::set(&buffer[currentAAOuterIndex++],
- current->position[0] + outerOffset.fX,
- current->position[1] + outerOffset.fY,
- 0.0f);
- AlphaVertex::set(&buffer[currentAAOuterIndex++],
- current->position[0] + innerOffset.fX,
- current->position[1] + innerOffset.fY,
- maxAlpha);
-
- AlphaVertex::set(&buffer[currentStrokeIndex++],
- current->position[0] + innerOffset.fX,
- current->position[1] + innerOffset.fY,
- maxAlpha);
- AlphaVertex::set(&buffer[currentStrokeIndex++],
- current->position[0] - innerOffset.fX,
- current->position[1] - innerOffset.fY,
- maxAlpha);
-
- AlphaVertex::set(&buffer[currentAAInnerIndex++],
- current->position[0] - innerOffset.fX,
- current->position[1] - innerOffset.fY,
- maxAlpha);
- AlphaVertex::set(&buffer[currentAAInnerIndex++],
- current->position[0] - outerOffset.fX,
- current->position[1] - outerOffset.fY,
- 0.0f);
-
- last = current;
- current = next;
- lastNormal = nextNormal;
- }
-
- // wrap each strip around to beginning, creating degenerate tris to bridge strips
- copyAlphaVertex(&buffer[currentAAOuterIndex++], &buffer[0]);
- copyAlphaVertex(&buffer[currentAAOuterIndex++], &buffer[1]);
- copyAlphaVertex(&buffer[currentAAOuterIndex++], &buffer[1]);
-
- copyAlphaVertex(&buffer[currentStrokeIndex++], &buffer[offset]);
- copyAlphaVertex(&buffer[currentStrokeIndex++], &buffer[offset + 1]);
- copyAlphaVertex(&buffer[currentStrokeIndex++], &buffer[offset + 1]);
-
- copyAlphaVertex(&buffer[currentAAInnerIndex++], &buffer[2 * offset]);
- copyAlphaVertex(&buffer[currentAAInnerIndex++], &buffer[2 * offset + 1]);
- // don't need to create last degenerate tri
-
-#if VERTEX_DEBUG
- for (unsigned int i = 0; i < vertexBuffer.getSize(); i++) {
- SkDebugf("point at %f %f, alpha %f", buffer[i].position[0], buffer[i].position[1], buffer[i].alpha);
- }
-#endif
-}
-
-void PathRenderer::ConvexPathVertices(const SkPath &path, const SkStrokeRec& stroke, bool isAA,
- const SkMatrix* transform, VertexBuffer* vertexBuffer) {
-
- SkStrokeRec::Style style = stroke.getStyle();
-
- float inverseScaleX, inverseScaleY;
- computeInverseScales(transform, inverseScaleX, inverseScaleY);
-
- SkTArray<Vertex, true> tempVertices;
- float threshInvScaleX = inverseScaleX;
- float threshInvScaleY = inverseScaleY;
- if (style == SkStrokeRec::kStroke_Style) {
- // alter the bezier recursion threshold values we calculate in order to compensate for
- // expansion done after the path vertices are found
- SkRect bounds = path.getBounds();
- if (!bounds.isEmpty()) {
- threshInvScaleX *= bounds.width() / (bounds.width() + stroke.getWidth());
- threshInvScaleY *= bounds.height() / (bounds.height() + stroke.getWidth());
- }
- }
-
- // force close if we're filling the path, since fill path expects closed perimeter.
- bool forceClose = style != SkStrokeRec::kStroke_Style;
- bool wasClosed = ConvexPathPerimeterVertices(path, forceClose, threshInvScaleX * threshInvScaleX,
- threshInvScaleY * threshInvScaleY, &tempVertices);
-
- if (!tempVertices.count()) {
- // path was empty, return without allocating vertex buffer
- return;
- }
-
-#if VERTEX_DEBUG
- for (unsigned int i = 0; i < tempVertices.count(); i++) {
- SkDebugf("orig path: point at %f %f", tempVertices[i].position[0], tempVertices[i].position[1]);
- }
-#endif
-
- if (style == SkStrokeRec::kStroke_Style) {
- float halfStrokeWidth = stroke.getWidth() * 0.5f;
- if (!isAA) {
- if (wasClosed) {
- getStrokeVerticesFromPerimeter(tempVertices, halfStrokeWidth, vertexBuffer,
- inverseScaleX, inverseScaleY);
- } else {
- getStrokeVerticesFromUnclosedVertices(tempVertices, halfStrokeWidth, vertexBuffer,
- inverseScaleX, inverseScaleY);
- }
-
- } else {
- if (wasClosed) {
- getStrokeVerticesFromPerimeterAA(tempVertices, halfStrokeWidth, vertexBuffer,
- inverseScaleX, inverseScaleY);
- } else {
- getStrokeVerticesFromUnclosedVerticesAA(tempVertices, halfStrokeWidth, vertexBuffer,
- inverseScaleX, inverseScaleY);
- }
- }
- } else {
- // For kStrokeAndFill style, the path should be adjusted externally, as it will be treated as a fill here.
- if (!isAA) {
- getFillVerticesFromPerimeter(tempVertices, vertexBuffer);
- } else {
- getFillVerticesFromPerimeterAA(tempVertices, vertexBuffer, inverseScaleX, inverseScaleY);
- }
- }
-}
-
-
-static void pushToVector(SkTArray<Vertex, true>* vertices, float x, float y) {
- // TODO: make this not yuck
- vertices->push_back();
- Vertex* newVertex = &((*vertices)[vertices->count() - 1]);
- Vertex::set(newVertex, x, y);
-}
-
-bool PathRenderer::ConvexPathPerimeterVertices(const SkPath& path, bool forceClose,
- float sqrInvScaleX, float sqrInvScaleY, SkTArray<Vertex, true>* outputVertices) {
-
-
- // TODO: to support joins other than sharp miter, join vertices should be labelled in the
- // perimeter, or resolved into more vertices. Reconsider forceClose-ing in that case.
- SkPath::Iter iter(path, forceClose);
- SkPoint pts[4];
- SkPath::Verb v;
-
- while (SkPath::kDone_Verb != (v = iter.next(pts))) {
- switch (v) {
- case SkPath::kMove_Verb:
- pushToVector(outputVertices, pts[0].x(), pts[0].y());
- ALOGV("Move to pos %f %f", pts[0].x(), pts[0].y());
- break;
- case SkPath::kClose_Verb:
- ALOGV("Close at pos %f %f", pts[0].x(), pts[0].y());
- break;
- case SkPath::kLine_Verb:
- ALOGV("kLine_Verb %f %f -> %f %f",
- pts[0].x(), pts[0].y(),
- pts[1].x(), pts[1].y());
-
- pushToVector(outputVertices, pts[1].x(), pts[1].y());
- break;
- case SkPath::kQuad_Verb:
- ALOGV("kQuad_Verb");
- RecursiveQuadraticBezierVertices(
- pts[0].x(), pts[0].y(),
- pts[2].x(), pts[2].y(),
- pts[1].x(), pts[1].y(),
- sqrInvScaleX, sqrInvScaleY, outputVertices);
- break;
- case SkPath::kCubic_Verb:
- ALOGV("kCubic_Verb");
- RecursiveCubicBezierVertices(
- pts[0].x(), pts[0].y(),
- pts[1].x(), pts[1].y(),
- pts[3].x(), pts[3].y(),
- pts[2].x(), pts[2].y(),
- sqrInvScaleX, sqrInvScaleY, outputVertices);
- break;
- default:
- break;
- }
- }
-
- int size = outputVertices->count();
- if (size >= 2 && (*outputVertices)[0].position[0] == (*outputVertices)[size - 1].position[0] &&
- (*outputVertices)[0].position[1] == (*outputVertices)[size - 1].position[1]) {
- outputVertices->pop_back();
- return true;
- }
- return false;
-}
-
-void PathRenderer::RecursiveCubicBezierVertices(
- float p1x, float p1y, float c1x, float c1y,
- float p2x, float p2y, float c2x, float c2y,
- float sqrInvScaleX, float sqrInvScaleY, SkTArray<Vertex, true>* outputVertices) {
- float dx = p2x - p1x;
- float dy = p2y - p1y;
- float d1 = sk_float_abs((c1x - p2x) * dy - (c1y - p2y) * dx);
- float d2 = sk_float_abs((c2x - p2x) * dy - (c2y - p2y) * dx);
- float d = d1 + d2;
-
- // multiplying by sqrInvScaleY/X equivalent to multiplying in dimensional scale factors
-
- if (d * d < THRESHOLD * THRESHOLD * (dx * dx * sqrInvScaleY + dy * dy * sqrInvScaleX)) {
- // below thresh, draw line by adding endpoint
- pushToVector(outputVertices, p2x, p2y);
- } else {
- float p1c1x = (p1x + c1x) * 0.5f;
- float p1c1y = (p1y + c1y) * 0.5f;
- float p2c2x = (p2x + c2x) * 0.5f;
- float p2c2y = (p2y + c2y) * 0.5f;
-
- float c1c2x = (c1x + c2x) * 0.5f;
- float c1c2y = (c1y + c2y) * 0.5f;
-
- float p1c1c2x = (p1c1x + c1c2x) * 0.5f;
- float p1c1c2y = (p1c1y + c1c2y) * 0.5f;
-
- float p2c1c2x = (p2c2x + c1c2x) * 0.5f;
- float p2c1c2y = (p2c2y + c1c2y) * 0.5f;
-
- float mx = (p1c1c2x + p2c1c2x) * 0.5f;
- float my = (p1c1c2y + p2c1c2y) * 0.5f;
-
- RecursiveCubicBezierVertices(
- p1x, p1y, p1c1x, p1c1y,
- mx, my, p1c1c2x, p1c1c2y,
- sqrInvScaleX, sqrInvScaleY, outputVertices);
- RecursiveCubicBezierVertices(
- mx, my, p2c1c2x, p2c1c2y,
- p2x, p2y, p2c2x, p2c2y,
- sqrInvScaleX, sqrInvScaleY, outputVertices);
- }
-}
-
-void PathRenderer::RecursiveQuadraticBezierVertices(
- float ax, float ay,
- float bx, float by,
- float cx, float cy,
- float sqrInvScaleX, float sqrInvScaleY, SkTArray<Vertex, true>* outputVertices) {
- float dx = bx - ax;
- float dy = by - ay;
- float d = (cx - bx) * dy - (cy - by) * dx;
-
- if (d * d < THRESHOLD * THRESHOLD * (dx * dx * sqrInvScaleY + dy * dy * sqrInvScaleX)) {
- // below thresh, draw line by adding endpoint
- pushToVector(outputVertices, bx, by);
- } else {
- float acx = (ax + cx) * 0.5f;
- float bcx = (bx + cx) * 0.5f;
- float acy = (ay + cy) * 0.5f;
- float bcy = (by + cy) * 0.5f;
-
- // midpoint
- float mx = (acx + bcx) * 0.5f;
- float my = (acy + bcy) * 0.5f;
-
- RecursiveQuadraticBezierVertices(ax, ay, mx, my, acx, acy,
- sqrInvScaleX, sqrInvScaleY, outputVertices);
- RecursiveQuadraticBezierVertices(mx, my, bx, by, bcx, bcy,
- sqrInvScaleX, sqrInvScaleY, outputVertices);
- }
-}
-
-}; // namespace uirenderer
-}; // namespace android
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