| /* |
| * 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.h" |
| |
| #include "GrClip.h" |
| #include "GrContext.h" |
| #include "GrRenderTargetContext.h" |
| #include "GrSurfaceContextPriv.h" |
| #include "SkGr.h" |
| #include "SkGradientShader.h" |
| |
| static constexpr SkScalar kTileWidth = 40; |
| static constexpr SkScalar kTileHeight = 30; |
| |
| static constexpr int kRowCount = 4; |
| static constexpr int kColCount = 3; |
| |
| static void draw_text(SkCanvas* canvas, const char* text) { |
| canvas->drawString(text, 0, 0, SkFont(nullptr, 12), SkPaint()); |
| } |
| |
| static void draw_gradient_tiles(GrRenderTargetContext* rtc, const SkMatrix& view, |
| bool adjustLocal) { |
| GrRenderTargetContext::QuadSetEntry quads[kRowCount * kColCount]; |
| |
| for (int i = 0; i < kRowCount; ++i) { |
| for (int j = 0; j < kColCount; ++j) { |
| SkRect tile = SkRect::MakeXYWH(j * kTileWidth, i * kTileHeight, kTileWidth, kTileHeight); |
| |
| int q = i * kColCount + j; |
| quads[q].fRect = tile; |
| quads[q].fColor = {1.f, 1.f, 1.f, 1.f}; |
| |
| if (adjustLocal) { |
| quads[q].fLocalMatrix.setTranslate(-tile.fLeft, -tile.fTop); |
| } else { |
| quads[q].fLocalMatrix.setIdentity(); |
| } |
| |
| quads[q].fAAFlags = GrQuadAAFlags::kNone; |
| if (i == 0) { |
| quads[q].fAAFlags |= GrQuadAAFlags::kTop; |
| } |
| if (i == kRowCount - 1) { |
| quads[q].fAAFlags |= GrQuadAAFlags::kBottom; |
| } |
| if (j == 0) { |
| quads[q].fAAFlags |= GrQuadAAFlags::kLeft; |
| } |
| if (j == kColCount - 1) { |
| quads[q].fAAFlags |= GrQuadAAFlags::kRight; |
| } |
| } |
| } |
| |
| // Make a shared gradient paint |
| static constexpr SkPoint pts[] = { {0.f, 0.f}, {0.25f * kTileWidth, 0.25f * kTileHeight} }; |
| static constexpr SkColor colors[] = { SK_ColorBLUE, SK_ColorWHITE }; |
| |
| auto gradient = SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kMirror_TileMode); |
| SkPaint paint; |
| paint.setShader(gradient); |
| GrPaint grPaint; |
| SkPaintToGrPaint(rtc->surfPriv().getContext(), rtc->colorSpaceInfo(), paint, view, &grPaint); |
| // And use private API to use GrFillRectOp |
| rtc->drawQuadSet(GrNoClip(), std::move(grPaint), GrAA::kYes, view, quads, SK_ARRAY_COUNT(quads)); |
| } |
| |
| static void draw_color_tiles(GrRenderTargetContext* rtc, const SkMatrix& view, bool multicolor) { |
| GrRenderTargetContext::QuadSetEntry quads[kRowCount * kColCount]; |
| |
| for (int i = 0; i < kRowCount; ++i) { |
| for (int j = 0; j < kColCount; ++j) { |
| SkRect tile = SkRect::MakeXYWH(j * kTileWidth, i * kTileHeight, kTileWidth, kTileHeight); |
| |
| int q = i * kColCount + j; |
| quads[q].fRect = tile; |
| quads[q].fLocalMatrix.setIdentity(); |
| |
| if (multicolor) { |
| quads[q].fColor = {(i + 1.f) / kRowCount, (j + 1.f) / kColCount, .4f, 1.f}; |
| } else { |
| quads[q].fColor = {.2f, .8f, .3f, 1.f}; |
| } |
| |
| quads[q].fAAFlags = GrQuadAAFlags::kNone; |
| if (i == 0) { |
| quads[q].fAAFlags |= GrQuadAAFlags::kTop; |
| } |
| if (i == kRowCount - 1) { |
| quads[q].fAAFlags |= GrQuadAAFlags::kBottom; |
| } |
| if (j == 0) { |
| quads[q].fAAFlags |= GrQuadAAFlags::kLeft; |
| } |
| if (j == kColCount - 1) { |
| quads[q].fAAFlags |= GrQuadAAFlags::kRight; |
| } |
| } |
| } |
| |
| GrPaint grPaint; |
| // And use private API to use GrFillRectOp |
| rtc->drawQuadSet(GrNoClip(), std::move(grPaint), GrAA::kYes, view, quads, SK_ARRAY_COUNT(quads)); |
| } |
| |
| static void draw_tile_boundaries(SkCanvas* canvas, const SkMatrix& local) { |
| // Draw grid of red lines at interior tile boundaries. |
| static constexpr SkScalar kLineOutset = 10.f; |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setColor(SK_ColorRED); |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setStrokeWidth(0.f); |
| for (int x = 1; x < kColCount; ++x) { |
| SkPoint pts[] = {{x * kTileWidth, 0}, {x * kTileWidth, kRowCount * kTileHeight}}; |
| local.mapPoints(pts, 2); |
| SkVector v = pts[1] - pts[0]; |
| v.setLength(v.length() + kLineOutset); |
| canvas->drawLine(pts[1] - v, pts[0] + v, paint); |
| } |
| for (int y = 1; y < kRowCount; ++y) { |
| SkPoint pts[] = {{0, y * kTileHeight}, {kTileWidth * kColCount, y * kTileHeight}}; |
| local.mapPoints(pts, 2); |
| SkVector v = pts[1] - pts[0]; |
| v.setLength(v.length() + kLineOutset); |
| canvas->drawLine(pts[1] - v, pts[0] + v, paint); |
| } |
| } |
| |
| // Tile renderers (column variation) |
| typedef void (*TileRenderer)(GrRenderTargetContext*, const SkMatrix&); |
| static TileRenderer kTileSets[] = { |
| [](GrRenderTargetContext* rtc, const SkMatrix& view) { draw_gradient_tiles(rtc, view, true); }, |
| [](GrRenderTargetContext* rtc, const SkMatrix& view) { draw_gradient_tiles(rtc, view, false); }, |
| [](GrRenderTargetContext* rtc, const SkMatrix& view) { draw_color_tiles(rtc, view, false); }, |
| [](GrRenderTargetContext* rtc, const SkMatrix& view) { draw_color_tiles(rtc, view, true); }, |
| }; |
| static const char* kTileSetNames[] = { "Local", "Aligned", "Green", "Multicolor" }; |
| static_assert(SK_ARRAY_COUNT(kTileSets) == SK_ARRAY_COUNT(kTileSetNames), "Count mismatch"); |
| |
| namespace skiagm { |
| |
| class DrawQuadSetGM : public GM { |
| private: |
| SkString onShortName() final { return SkString("draw_quad_set"); } |
| SkISize onISize() override { return SkISize::Make(800, 800); } |
| |
| void onDraw(SkCanvas* canvas) override { |
| GrContext* ctx = canvas->getGrContext(); |
| if (!ctx) { |
| DrawGpuOnlyMessage(canvas); |
| return; |
| } |
| GrRenderTargetContext* rtc = canvas->internal_private_accessTopLayerRenderTargetContext(); |
| SkASSERT(rtc); |
| |
| SkMatrix rowMatrices[5]; |
| // Identity |
| rowMatrices[0].setIdentity(); |
| // Translate/scale |
| rowMatrices[1].setTranslate(5.5f, 20.25f); |
| rowMatrices[1].postScale(.9f, .7f); |
| // Rotation |
| rowMatrices[2].setRotate(20.0f); |
| rowMatrices[2].preTranslate(15.f, -20.f); |
| // Skew |
| rowMatrices[3].setSkew(.5f, .25f); |
| rowMatrices[3].preTranslate(-30.f, 0.f); |
| // Perspective |
| SkPoint src[4]; |
| SkRect::MakeWH(kColCount * kTileWidth, kRowCount * kTileHeight).toQuad(src); |
| SkPoint dst[4] = {{0, 0}, |
| {kColCount * kTileWidth + 10.f, 15.f}, |
| {kColCount * kTileWidth - 28.f, kRowCount * kTileHeight + 40.f}, |
| {25.f, kRowCount * kTileHeight - 15.f}}; |
| SkAssertResult(rowMatrices[4].setPolyToPoly(src, dst, 4)); |
| rowMatrices[4].preTranslate(0.f, +10.f); |
| static const char* matrixNames[] = { "Identity", "T+S", "Rotate", "Skew", "Perspective" }; |
| static_assert(SK_ARRAY_COUNT(matrixNames) == SK_ARRAY_COUNT(rowMatrices), "Count mismatch"); |
| |
| // Print a column header |
| canvas->save(); |
| canvas->translate(110.f, 20.f); |
| for (size_t j = 0; j < SK_ARRAY_COUNT(kTileSetNames); ++j) { |
| draw_text(canvas, kTileSetNames[j]); |
| canvas->translate(kColCount * kTileWidth + 30.f, 0.f); |
| } |
| canvas->restore(); |
| canvas->translate(0.f, 40.f); |
| |
| // Render all tile variations |
| for (size_t i = 0; i < SK_ARRAY_COUNT(rowMatrices); ++i) { |
| canvas->save(); |
| canvas->translate(10.f, 0.5f * kRowCount * kTileHeight); |
| draw_text(canvas, matrixNames[i]); |
| |
| canvas->translate(100.f, -0.5f * kRowCount * kTileHeight); |
| for (size_t j = 0; j < SK_ARRAY_COUNT(kTileSets); ++j) { |
| canvas->save(); |
| draw_tile_boundaries(canvas, rowMatrices[i]); |
| |
| canvas->concat(rowMatrices[i]); |
| kTileSets[j](rtc, canvas->getTotalMatrix()); |
| // Undo the local transformation |
| canvas->restore(); |
| // And advance to the next column |
| canvas->translate(kColCount * kTileWidth + 30.f, 0.f); |
| } |
| // Reset back to the left edge |
| canvas->restore(); |
| // And advance to the next row |
| canvas->translate(0.f, kRowCount * kTileHeight + 20.f); |
| } |
| } |
| }; |
| |
| DEF_GM(return new DrawQuadSetGM();) |
| |
| } // namespace skiagm |
