Add a new GM: shadertext2.
It tests a bitmap shader with various combinations of matrices and shader matrices. The text is drawn filled and stroked. Review URL: https://codereview.appspot.com/6639052 git-svn-id: http://skia.googlecode.com/svn/trunk@5877 2bbb7eff-a529-9590-31e7-b0007b416f81
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bsalomon@google.com
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439cb51451
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41fe45b955
217
gm/shadertext2.cpp
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217
gm/shadertext2.cpp
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkUnitMappers.h"
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namespace skiagm {
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static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) {
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bm->setConfig(config, w, h);
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bm->allocPixels();
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bm->eraseColor(0);
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SkCanvas canvas(*bm);
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SkScalar s = SkIntToScalar(SkMin32(w, h));
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static const SkPoint kPts0[] = { { 0, 0 }, { s, s } };
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static const SkPoint kPts1[] = { { s, 0 }, { 0, s } };
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static const SkScalar kPos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
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static const SkColor kColors0[] = {0x40FF00FF, 0xF0FFFF00, 0x4000FFFF };
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static const SkColor kColors1[] = {0xF0FF00FF, 0x80FFFF00, 0xF000FFFF };
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SkPaint paint;
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SkUnitMapper* um = NULL;
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um = new SkCosineMapper;
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SkAutoUnref au(um);
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paint.setShader(SkGradientShader::CreateLinear(kPts0, kColors0, kPos,
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SK_ARRAY_COUNT(kColors0), SkShader::kClamp_TileMode, um))->unref();
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canvas.drawPaint(paint);
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paint.setShader(SkGradientShader::CreateLinear(kPts1, kColors1, kPos,
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SK_ARRAY_COUNT(kColors1), SkShader::kClamp_TileMode))->unref();
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canvas.drawPaint(paint);
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}
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///////////////////////////////////////////////////////////////////////////////
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struct LabeledMatrix {
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SkMatrix fMatrix;
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const char* fLabel;
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};
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class ShaderText2GM : public GM {
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public:
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ShaderText2GM() {
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this->setBGColor(0xFFDDDDDD);
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}
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protected:
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SkString onShortName() {
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return SkString("shadertext2");
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}
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SkISize onISize() { return make_isize(1800, 900); }
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virtual void onDraw(SkCanvas* canvas) {
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static const char kText[] = "SKIA";
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static const int kTextLen = SK_ARRAY_COUNT(kText) - 1;
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static const int kPointSize = 55;
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SkTDArray<LabeledMatrix> matrices;
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matrices.append()->fMatrix.reset();
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matrices.top().fLabel = "Identity";
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matrices.append()->fMatrix.setScale(1.2f, 0.8f);
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matrices.top().fLabel = "Scale";
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matrices.append()->fMatrix.setRotate(10.f);
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matrices.top().fLabel = "Rotate";
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matrices.append()->fMatrix.reset();
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matrices.top().fMatrix.setPerspX(-0.0015f);
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matrices.top().fMatrix.setPerspY(+0.0015f);
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matrices.top().fLabel = "Persp";
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SkTDArray<LabeledMatrix> localMatrices;
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localMatrices.append()->fMatrix.reset();
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localMatrices.top().fLabel = "Identity";
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localMatrices.append()->fMatrix.setScale(2.5f, 0.2f);
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localMatrices.top().fLabel = "Scale";
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localMatrices.append()->fMatrix.setRotate(45.f);
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localMatrices.top().fLabel = "Rotate";
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localMatrices.append()->fMatrix.reset();
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localMatrices.top().fMatrix.setPerspX(-0.007f);
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localMatrices.top().fMatrix.setPerspY(+0.008f);
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localMatrices.top().fLabel = "Persp";
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static SkBitmap bmp;
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if (bmp.isNull()) {
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makebm(&bmp, SkBitmap::kARGB_8888_Config, kPointSize / 2, kPointSize / 2);
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}
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SkAutoTUnref<SkShader> shader(SkShader::CreateBitmapShader(bmp,
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SkShader::kMirror_TileMode,
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SkShader::kRepeat_TileMode));
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SkPaint fillPaint;
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fillPaint.setAntiAlias(true);
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fillPaint.setTextSize(SkIntToScalar(kPointSize));
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fillPaint.setFilterBitmap(true);
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fillPaint.setShader(shader);
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SkPaint outlinePaint;
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outlinePaint.setAntiAlias(true);
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outlinePaint.setTextSize(SkIntToScalar(kPointSize));
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outlinePaint.setStyle(SkPaint::kStroke_Style);
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outlinePaint.setStrokeWidth(0.f);
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SkScalar w = fillPaint.measureText(kText, kTextLen);
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static SkScalar kPadY = 0.5f * kPointSize;
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static SkScalar kPadX = 1.5f * kPointSize;
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SkPaint strokePaint(fillPaint);
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strokePaint.setStyle(SkPaint::kStroke_Style);
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strokePaint.setStrokeWidth(kPointSize * 0.1f);
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SkPaint labelPaint;
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labelPaint.setColor(0xff000000);
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labelPaint.setAntiAlias(true);
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labelPaint.setTextSize(12.f);
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canvas->translate(15.f, 15.f);
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canvas->drawBitmap(bmp, 0, 0);
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canvas->translate(0, bmp.height() + labelPaint.getTextSize() + 15.f);
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static const char kLabelLabel[] = "localM / canvasM";
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canvas->drawText(kLabelLabel, strlen(kLabelLabel), 0, 0, labelPaint);
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canvas->translate(0, 15.f);
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canvas->save();
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SkScalar maxLabelW = 0;
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canvas->translate(0, kPadY / 2 + kPointSize);
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for (int lm = 0; lm < localMatrices.count(); ++lm) {
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canvas->drawText(matrices[lm].fLabel, strlen(matrices[lm].fLabel),
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0, labelPaint.getTextSize() - 1, labelPaint);
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SkScalar labelW = labelPaint.measureText(matrices[lm].fLabel,
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strlen(matrices[lm].fLabel));
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maxLabelW = SkMaxScalar(maxLabelW, labelW);
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canvas->translate(0.f, 2 * kPointSize + 2.5f * kPadY);
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}
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canvas->restore();
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canvas->translate(maxLabelW + kPadX / 2.f, 0.f);
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for (int s = 0; s < 2; ++s) {
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SkPaint& paint = s ? strokePaint : fillPaint;
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SkScalar columnH;
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for (int m = 0; m < matrices.count(); ++m) {
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columnH = 0;
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canvas->save();
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canvas->drawText(matrices[m].fLabel, strlen(matrices[m].fLabel),
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0, labelPaint.getTextSize() - 1, labelPaint);
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canvas->translate(0, kPadY / 2 + kPointSize);
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columnH += kPadY / 2 + kPointSize;
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for (int lm = 0; lm < localMatrices.count(); ++lm) {
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shader->setLocalMatrix(localMatrices[lm].fMatrix);
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canvas->save();
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canvas->concat(matrices[m].fMatrix);
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canvas->drawText(kText, kTextLen, 0, 0, paint);
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canvas->drawText(kText, kTextLen, 0, 0, outlinePaint);
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canvas->restore();
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SkPath path;
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path.arcTo(SkRect::MakeXYWH(-0.1f * w, 0.f,
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1.2f * w, 2.f * kPointSize),
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225.f, 359.f,
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false);
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path.close();
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canvas->translate(0.f, kPointSize + kPadY);
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columnH += kPointSize + kPadY;
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canvas->save();
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canvas->concat(matrices[m].fMatrix);
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canvas->drawTextOnPath(kText, kTextLen, path, NULL, paint);
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canvas->drawTextOnPath(kText, kTextLen, path, NULL, outlinePaint);
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canvas->restore();
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SkPaint stroke;
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stroke.setStyle(SkPaint::kStroke_Style);
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canvas->translate(0.f, kPointSize + kPadY);
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columnH += kPointSize + kPadY;
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}
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canvas->restore();
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canvas->translate(w + kPadX, 0.f);
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}
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if (0 == s) {
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canvas->drawLine(0.f, -kPadY, 0.f, columnH + kPadY, outlinePaint);
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canvas->translate(kPadX / 2, 0.f);
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static const char kFillLabel[] = "Filled";
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static const char kStrokeLabel[] = "Stroked";
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SkScalar y = columnH + kPadY / 2;
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SkScalar fillX = -outlinePaint.measureText(kFillLabel, strlen(kFillLabel)) - kPadX;
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SkScalar strokeX = kPadX;
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canvas->drawText(kFillLabel, strlen(kFillLabel), fillX, y, labelPaint);
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canvas->drawText(kStrokeLabel, strlen(kStrokeLabel), strokeX, y, labelPaint);
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}
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}
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}
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private:
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typedef GM INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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#ifndef SK_BUILD_FOR_ANDROID
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static GM* MyFactory(void*) { return new ShaderText2GM; }
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static GMRegistry reg(MyFactory);
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#endif
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}
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@ -59,6 +59,7 @@
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'../gm/samplerstress.cpp',
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'../gm/shaderbounds.cpp',
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'../gm/shadertext.cpp',
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'../gm/shadertext2.cpp',
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'../gm/shadows.cpp',
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'../gm/simpleaaclip.cpp',
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'../gm/strokefill.cpp',
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