eebe735dea
Just the class/files. variable names and additional comments to follow. Change-Id: Ic03d07fd5009eaf3d706c2536486a117328963fc Reviewed-on: https://skia-review.googlesource.com/c/skia/+/342617 Commit-Queue: Brian Salomon <bsalomon@google.com> Reviewed-by: Greg Daniel <egdaniel@google.com>
128 lines
4.9 KiB
C++
128 lines
4.9 KiB
C++
/*
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* Copyright 2020 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/gm.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkPath.h"
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#include "include/core/SkPoint.h"
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#include "include/gpu/GrContextOptions.h"
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#include "include/gpu/GrRecordingContext.h"
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#include "src/gpu/GrDrawingManager.h"
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#include "src/gpu/GrRecordingContextPriv.h"
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#include "src/gpu/tessellate/GrTessellationPathRenderer.h"
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static constexpr float kStrokeWidth = 100;
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static constexpr int kTestWidth = 120 * 4;
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static constexpr int kTestHeight = 120 * 3 + 140;
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static void draw_strokes(SkCanvas* canvas, SkColor strokeColor, const SkPath& path,
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const SkPath& cubic) {
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SkPaint strokePaint;
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strokePaint.setAntiAlias(true);
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strokePaint.setStrokeWidth(kStrokeWidth);
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strokePaint.setColor(strokeColor);
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strokePaint.setStyle(SkPaint::kStroke_Style);
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SkAutoCanvasRestore arc(canvas, true);
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strokePaint.setStrokeJoin(SkPaint::kBevel_Join);
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canvas->drawPath(path, strokePaint);
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canvas->translate(120, 0);
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strokePaint.setStrokeJoin(SkPaint::kRound_Join);
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canvas->drawPath(path, strokePaint);
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canvas->translate(120, 0);
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strokePaint.setStrokeJoin(SkPaint::kMiter_Join);
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canvas->drawPath(path, strokePaint);
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canvas->translate(120, 0);
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canvas->drawPath(cubic, strokePaint);
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}
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static void draw_test(SkCanvas* canvas, SkColor strokeColor) {
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SkAutoCanvasRestore arc(canvas, true);
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canvas->translate(60, 60);
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canvas->clear(SK_ColorBLACK);
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draw_strokes(canvas, strokeColor,
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SkPath().lineTo(10,0).lineTo(10,10),
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SkPath().cubicTo(10,0, 10,0, 10,10));
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canvas->translate(0, 120);
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draw_strokes(canvas, strokeColor,
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SkPath().lineTo(0,-10).lineTo(0,10),
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SkPath().cubicTo(0,-10, 0,-10, 0,10));
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canvas->translate(0, 120);
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draw_strokes(canvas, strokeColor,
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SkPath().lineTo(0,-10).lineTo(10,-10).lineTo(10,10).lineTo(0,10),
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SkPath().cubicTo(0,-10, 10,10, 0,10));
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canvas->translate(0, 140);
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draw_strokes(canvas, strokeColor,
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SkPath().lineTo(0,-10).lineTo(10,-10).lineTo(10,0).lineTo(0,0),
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SkPath().cubicTo(0,-10, 10,0, 0,0));
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canvas->translate(0, 120);
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}
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DEF_SIMPLE_GM(widebuttcaps, canvas, kTestWidth, kTestHeight) {
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draw_test(canvas, SK_ColorGREEN);
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}
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class WideButtCaps_tess_segs_5 : public skiagm::GpuGM {
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SkString onShortName() override {
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return SkString("widebuttcaps_tess_segs_5");
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}
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SkISize onISize() override {
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return SkISize::Make(kTestWidth, kTestHeight);
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}
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// Pick a very small, odd (and better yet, prime) number of segments.
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//
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// - Odd because it makes the tessellation strip asymmetric, which will be important to test for
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// future plans that involve drawing in reverse order.
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//
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// - >=4 because the tessellator code will just assume we have enough to combine a miter join
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// and line in a single patch. (Requires 4 segments. Spec required minimum is 64.)
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static constexpr int kMaxTessellationSegmentsOverride = 5;
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void modifyGrContextOptions(GrContextOptions* options) override {
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options->fMaxTessellationSegmentsOverride = kMaxTessellationSegmentsOverride;
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// Only allow the tessellation path renderer.
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options->fGpuPathRenderers = (GpuPathRenderers)((int)options->fGpuPathRenderers &
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(int)GpuPathRenderers::kTessellation);
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}
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DrawResult onDraw(GrRecordingContext* context,
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GrSurfaceDrawContext* rtc, SkCanvas* canvas,
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SkString* errorMsg) override {
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if (!context->priv().caps()->shaderCaps()->tessellationSupport() ||
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!GrTessellationPathRenderer::IsSupported(*context->priv().caps())) {
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errorMsg->set("Tessellation not supported.");
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return DrawResult::kSkip;
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}
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auto opts = context->priv().drawingManager()->testingOnly_getOptionsForPathRendererChain();
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if (!(opts.fGpuPathRenderers & GpuPathRenderers::kTessellation)) {
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errorMsg->set("GrTessellationPathRenderer disabled.");
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return DrawResult::kSkip;
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}
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if (context->priv().caps()->shaderCaps()->maxTessellationSegments() !=
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kMaxTessellationSegmentsOverride) {
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errorMsg->set("modifyGrContextOptions() did not limit maxTessellationSegments. "
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"(Are you running viewer? If so use '--maxTessellationSegments 5'.)");
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return DrawResult::kFail;
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}
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// Suppress a tessellator warning message that caps.maxTessellationSegments is too small.
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GrRecordingContextPriv::AutoSuppressWarningMessages aswm(context);
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draw_test(canvas, SK_ColorRED);
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return DrawResult::kOk;
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}
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};
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DEF_GM( return new WideButtCaps_tess_segs_5; )
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