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- /*
- * Copyright 2018 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkBlendMode.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPoint.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkVertices.h"
- #include <stdint.h>
- using namespace skiagm;
- static const int kCellSize = 60;
- static const int kColumnSize = 36;
- static const int kBoneCount = 7;
- static const SkVertices::Bone kBones[] = {
- {{ 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f }}, // SkMatrix::I()
- {{ 1.0f, 0.0f, 0.0f, 1.0f, 10.0f, 0.0f }}, // SkMatrix::MakeTrans(10, 0)
- {{ 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 10.0f }}, // SkMatrix::MakeTrans(0, 10)
- {{ 1.0f, 0.0f, 0.0f, 1.0f, -10.0f, 0.0f }}, // SkMatrix::MakeTrans(-10, 0)
- {{ 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, -10.0f }}, // SkMatrix::MakeTrans(0, -10)
- {{ 0.5f, 0.0f, 0.0f, 0.5f, 0.0f, 0.0f }}, // SkMatrix::MakeScale(0.5)
- {{ 1.5f, 0.0f, 0.0f, 1.5f, 0.0f, 0.0f }}, // SkMatrix::MakeScale(1.5)
- };
- static const int kVertexCount = 4;
- static const SkPoint kPositions[] = {
- { 0, 0 },
- { 0, 30 },
- { 30, 30 },
- { 30, 0 },
- };
- static const SkColor kColors[] = {
- 0xFFFF0000,
- 0xFF00FF00,
- 0xFF0000FF,
- 0xFFFFFF00,
- };
- static const SkVertices::BoneIndices kBoneIndices[] = {
- {{ 1, 0, 0, 0 }},
- {{ 2, 1, 0, 0 }},
- {{ 3, 2, 1, 0 }},
- {{ 4, 3, 2, 1 }},
- };
- static const SkVertices::BoneWeights kBoneWeights[] = {
- {{ 1.0f, 0.0f, 0.0f, 0.0f }},
- {{ 0.5f, 0.5f, 0.0f, 0.0f }},
- {{ 0.34f, 0.33f, 0.33f, 0.0f }},
- {{ 0.25f, 0.25f, 0.25f, 0.25f }},
- };
- static const int kIndexCount = 6;
- static const uint16_t kIndices[] = {
- 0, 1, 2,
- 2, 3, 0,
- };
- // Swap two SkVertices::Bone pointers in place.
- static void swap(const SkVertices::Bone** x, const SkVertices::Bone** y) {
- const SkVertices::Bone* temp = *x;
- *x = *y;
- *y = temp;
- }
- class SkinningGM : public GM {
- public:
- SkinningGM(bool deformUsingCPU, bool cache)
- : fPaint()
- , fVertices(nullptr)
- , fDeformUsingCPU(deformUsingCPU)
- , fCache(cache)
- {}
- protected:
- bool runAsBench() const override {
- return true;
- }
- SkString onShortName() override {
- SkString name("skinning");
- if (fDeformUsingCPU) {
- name.append("_cpu");
- }
- if (fCache) {
- name.append("_cached");
- }
- return name;
- }
- SkISize onISize() override {
- return SkISize::Make(2400, 2400);
- }
- void onOnceBeforeDraw() override {
- fVertices = SkVertices::MakeCopy(SkVertices::kTriangles_VertexMode,
- kVertexCount,
- kPositions,
- nullptr,
- kColors,
- kBoneIndices,
- kBoneWeights,
- kIndexCount,
- kIndices,
- !fCache);
- }
- void onDraw(SkCanvas* canvas) override {
- // Set the initial position.
- int xpos = kCellSize;
- int ypos = kCellSize;
- // Create the mutable set of bones.
- const SkVertices::Bone* bones[kBoneCount];
- for (int i = 0; i < kBoneCount; i ++) {
- bones[i] = &kBones[i];
- }
- // Draw the vertices.
- drawPermutations(canvas, xpos, ypos, bones, 1);
- }
- private:
- void drawPermutations(SkCanvas* canvas,
- int& xpos,
- int& ypos,
- const SkVertices::Bone** bones,
- int start) {
- if (start == kBoneCount) {
- // Reached the end of the permutations, so draw.
- canvas->save();
- // Copy the bones.
- SkVertices::Bone copiedBones[kBoneCount];
- for (int i = 0; i < kBoneCount; i ++) {
- copiedBones[i] = *bones[i];
- }
- // Set the position.
- canvas->translate(xpos, ypos);
- // Draw the vertices.
- if (fDeformUsingCPU) {
- // Apply the bones.
- sk_sp<SkVertices> vertices = fVertices->applyBones(copiedBones,
- kBoneCount);
- // Deform with CPU.
- canvas->drawVertices(vertices.get(),
- SkBlendMode::kSrc,
- fPaint);
- } else {
- // Deform with GPU.
- canvas->drawVertices(fVertices.get(),
- copiedBones,
- kBoneCount,
- SkBlendMode::kSrc,
- fPaint);
- }
- canvas->restore();
- // Get a new position to draw the vertices.
- xpos += kCellSize;
- if (xpos > kCellSize * kColumnSize) {
- xpos = kCellSize;
- ypos += kCellSize;
- }
- return;
- }
- // Find all possible permutations within the given range.
- for (int i = start; i < kBoneCount; i ++) {
- // Swap the start and i-th elements.
- swap(bones + start, bones + i);
- // Find permutations of the sub array.
- drawPermutations(canvas, xpos, ypos, bones, start + 1);
- // Swap the elements back.
- swap(bones + i, bones + start);
- }
- }
- private:
- SkPaint fPaint;
- sk_sp<SkVertices> fVertices;
- bool fDeformUsingCPU;
- bool fCache;
- typedef GM INHERITED;
- };
- /////////////////////////////////////////////////////////////////////////////////////
- DEF_GM(return new SkinningGM(true, true);)
- DEF_GM(return new SkinningGM(false, true);)
- DEF_GM(return new SkinningGM(true, false);)
- DEF_GM(return new SkinningGM(false, false);)
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