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skia2/gm/compositor_quads.cpp
Ben Wagner 7fde8e1728 IWYU for gms. 
This almost gets gms to be iwyu clean. The last bit is around gm.cpp
and the tracing framework and its use of atomic. Will also need a way
of keeping things from regressing, which is difficult due to needing to
do this outside-in.

Change-Id: I1393531e99da8b0f1a29f55c53c86d53f459af7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211593
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-05-02 17:48:53 +00:00

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/*
* Copyright 2019 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// This test only works with the GPU backend.
#include "gm/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkData.h"
#include "include/core/SkFilterQuality.h"
#include "include/core/SkFont.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkMaskFilter.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTileMode.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "include/effects/SkColorMatrix.h"
#include "include/effects/SkGradientShader.h"
#include "include/effects/SkMorphologyImageFilter.h"
#include "include/effects/SkShaderMaskFilter.h"
#include "include/private/SkTArray.h"
#include "src/core/SkLineClipper.h"
#include "tools/Resources.h"
#include "tools/gpu/YUVUtils.h"
#include <array>
#include <memory>
#include <utility>
// This GM mimics the draw calls used by complex compositors that focus on drawing rectangles
// and quadrilaterals with per-edge AA, with complex images, effects, and seamless tiling.
// It will be updated to reflect the patterns seen in Chromium's SkiaRenderer. It is currently
// restricted to adding draw ops directly in Ganesh since there is no fully-specified public API.
static constexpr SkScalar kTileWidth = 40;
static constexpr SkScalar kTileHeight = 30;
static constexpr int kRowCount = 4;
static constexpr int kColCount = 3;
// To mimic Chromium's BSP clipping strategy, a set of three lines formed by triangle edges
// of the below points are used to clip against the regular tile grid. The tile grid occupies
// a 120 x 120 rectangle (40px * 3 cols by 30px * 4 rows).
static constexpr SkPoint kClipP1 = {1.75f * kTileWidth, 0.8f * kTileHeight};
static constexpr SkPoint kClipP2 = {0.6f * kTileWidth, 2.f * kTileHeight};
static constexpr SkPoint kClipP3 = {2.9f * kTileWidth, 3.5f * kTileHeight};
///////////////////////////////////////////////////////////////////////////////////////////////
// Utilities for operating on lines and tiles
///////////////////////////////////////////////////////////////////////////////////////////////
// p0 and p1 form a segment contained the tile grid, so extends them by a large enough margin
// that the output points stored in 'line' are outside the tile grid (thus effectively infinite).
static void clipping_line_segment(const SkPoint& p0, const SkPoint& p1, SkPoint line[2]) {
SkVector v = p1 - p0;
// 10f was chosen as a balance between large enough to scale the currently set clip
// points outside of the tile grid, but small enough to preserve precision.
line[0] = p0 - v * 10.f;
line[1] = p1 + v * 10.f;
}
// Returns true if line segment (p0-p1) intersects with line segment (l0-l1); if true is returned,
// the intersection point is stored in 'intersect'.
static bool intersect_line_segments(const SkPoint& p0, const SkPoint& p1,
const SkPoint& l0, const SkPoint& l1, SkPoint* intersect) {
static constexpr SkScalar kHorizontalTolerance = 0.01f; // Pretty conservative
// Use doubles for accuracy, since the clipping strategy used below can create T
// junctions, and lower precision could artificially create gaps
double pY = (double) p1.fY - (double) p0.fY;
double pX = (double) p1.fX - (double) p0.fX;
double lY = (double) l1.fY - (double) l0.fY;
double lX = (double) l1.fX - (double) l0.fX;
double plY = (double) p0.fY - (double) l0.fY;
double plX = (double) p0.fX - (double) l0.fX;
if (SkScalarNearlyZero(pY, kHorizontalTolerance)) {
if (SkScalarNearlyZero(lY, kHorizontalTolerance)) {
// Two horizontal lines
return false;
} else {
// Recalculate but swap p and l
return intersect_line_segments(l0, l1, p0, p1, intersect);
}
}
// Up to now, the line segments do not form an invalid intersection
double lNumerator = plX * pY - plY * pX;
double lDenom = lX * pY - lY * pX;
if (SkScalarNearlyZero(lDenom)) {
// Parallel or identical
return false;
}
// Calculate alphaL that provides the intersection point along (l0-l1), e.g. l0+alphaL*(l1-l0)
double alphaL = lNumerator / lDenom;
if (alphaL < 0.0 || alphaL > 1.0) {
// Outside of the l segment
return false;
}
// Calculate alphaP from the valid alphaL (since it could be outside p segment)
// double alphaP = (alphaL * l.fY - pl.fY) / p.fY;
double alphaP = (alphaL * lY - plY) / pY;
if (alphaP < 0.0 || alphaP > 1.0) {
// Outside of p segment
return false;
}
// Is valid, so calculate the actual intersection point
*intersect = l1 * SkScalar(alphaL) + l0 * SkScalar(1.0 - alphaL);
return true;
}
// Draw a line through the two points, outset by a fixed length in screen space
static void draw_outset_line(SkCanvas* canvas, const SkMatrix& local, const SkPoint pts[2],
const SkPaint& paint) {
static constexpr SkScalar kLineOutset = 10.f;
SkPoint mapped[2];
local.mapPoints(mapped, pts, 2);
SkVector v = mapped[1] - mapped[0];
v.setLength(v.length() + kLineOutset);
canvas->drawLine(mapped[1] - v, mapped[0] + v, paint);
}
// Draw grid of red lines at interior tile boundaries.
static void draw_tile_boundaries(SkCanvas* canvas, const SkMatrix& local) {
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}};
draw_outset_line(canvas, local, pts, paint);
}
for (int y = 1; y < kRowCount; ++y) {
SkPoint pts[] = {{0, y * kTileHeight}, {kTileWidth * kColCount, y * kTileHeight}};
draw_outset_line(canvas, local, pts, paint);
}
}
// Draw the arbitrary clipping/split boundaries that intersect the tile grid as green lines
static void draw_clipping_boundaries(SkCanvas* canvas, const SkMatrix& local) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(SK_ColorGREEN);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(0.f);
// Clip the "infinite" line segments to a rectangular region outside the tile grid
SkRect border = SkRect::MakeWH(kTileWidth * kColCount, kTileHeight * kRowCount);
// Draw p1 to p2
SkPoint line[2];
SkPoint clippedLine[2];
clipping_line_segment(kClipP1, kClipP2, line);
SkAssertResult(SkLineClipper::IntersectLine(line, border, clippedLine));
draw_outset_line(canvas, local, clippedLine, paint);
// Draw p2 to p3
clipping_line_segment(kClipP2, kClipP3, line);
SkAssertResult(SkLineClipper::IntersectLine(line, border, clippedLine));
draw_outset_line(canvas, local, clippedLine, paint);
// Draw p3 to p1
clipping_line_segment(kClipP3, kClipP1, line);
SkAssertResult(SkLineClipper::IntersectLine(line, border, clippedLine));
draw_outset_line(canvas, local, clippedLine, paint);
}
static void draw_text(SkCanvas* canvas, const char* text) {
canvas->drawString(text, 0, 0, SkFont(nullptr, 12), SkPaint());
}
/////////////////////////////////////////////////////////////////////////////////////////////////
// Abstraction for rendering a possibly clipped tile, that can apply different effects to mimic
// the Chromium quad types, and a generic GM template to arrange renderers x transforms in a grid
/////////////////////////////////////////////////////////////////////////////////////////////////
class ClipTileRenderer : public SkRefCntBase {
public:
virtual ~ClipTileRenderer() {}
// Draw the base rect, possibly clipped by 'clip' if that is not null. The edges to antialias
// are specified in 'edgeAA' (to make manipulation easier than an unsigned bitfield). 'tileID'
// represents the location of rect within the tile grid, 'quadID' is the unique ID of the clip
// region within the tile (reset for each tile).
//
// The edgeAA order matches that of clip, so it refers to top, right, bottom, left.
// Return draw count
virtual int drawTile(SkCanvas* canvas, const SkRect& rect, const SkPoint clip[4],
const bool edgeAA[4], int tileID, int quadID) = 0;
virtual void drawBanner(SkCanvas* canvas) = 0;
// Return draw count
virtual int drawTiles(SkCanvas* canvas) {
// All three lines in a list
SkPoint lines[6];
clipping_line_segment(kClipP1, kClipP2, lines);
clipping_line_segment(kClipP2, kClipP3, lines + 2);
clipping_line_segment(kClipP3, kClipP1, lines + 4);
bool edgeAA[4];
int tileID = 0;
int drawCount = 0;
for (int i = 0; i < kRowCount; ++i) {
for (int j = 0; j < kColCount; ++j) {
// The unclipped tile geometry
SkRect tile = SkRect::MakeXYWH(j * kTileWidth, i * kTileHeight,
kTileWidth, kTileHeight);
// Base edge AA flags if there are no clips; clipped lines will only turn off edges
edgeAA[0] = i == 0; // Top
edgeAA[1] = j == kColCount - 1; // Right
edgeAA[2] = i == kRowCount - 1; // Bottom
edgeAA[3] = j == 0; // Left
// Now clip against the 3 lines formed by kClipPx and split into general purpose
// quads as needed.
int quadCount = 0;
drawCount += this->clipTile(canvas, tileID, tile, nullptr, edgeAA, lines, 3,
&quadCount);
tileID++;
}
}
return drawCount;
}
protected:
SkCanvas::QuadAAFlags maskToFlags(const bool edgeAA[4]) const {
unsigned flags = (edgeAA[0] * SkCanvas::kTop_QuadAAFlag) |
(edgeAA[1] * SkCanvas::kRight_QuadAAFlag) |
(edgeAA[2] * SkCanvas::kBottom_QuadAAFlag) |
(edgeAA[3] * SkCanvas::kLeft_QuadAAFlag);
return static_cast<SkCanvas::QuadAAFlags>(flags);
}
// Recursively splits the quadrilateral against the segments stored in 'lines', which must be
// 2 * lineCount long. Increments 'quadCount' for each split quadrilateral, and invokes the
// drawTile at leaves.
int clipTile(SkCanvas* canvas, int tileID, const SkRect& baseRect, const SkPoint quad[4],
const bool edgeAA[4], const SkPoint lines[], int lineCount, int* quadCount) {
if (lineCount == 0) {
// No lines, so end recursion by drawing the tile. If the tile was never split then
// 'quad' remains null so that drawTile() can differentiate how it should draw.
int draws = this->drawTile(canvas, baseRect, quad, edgeAA, tileID, *quadCount);
*quadCount = *quadCount + 1;
return draws;
}
static constexpr int kTL = 0; // Top-left point index in points array
static constexpr int kTR = 1; // Top-right point index in points array
static constexpr int kBR = 2; // Bottom-right point index in points array
static constexpr int kBL = 3; // Bottom-left point index in points array
static constexpr int kS0 = 4; // First split point index in points array
static constexpr int kS1 = 5; // Second split point index in points array
SkPoint points[6];
if (quad) {
// Copy the original 4 points into set of points to consider
for (int i = 0; i < 4; ++i) {
points[i] = quad[i];
}
} else {
// Haven't been split yet, so fill in based on the rect
baseRect.toQuad(points);
}
// Consider the first line against the 4 quad edges in tile, which should have 0,1, or 2
// intersection points since the tile is convex.
int splitIndices[2]; // Edge that was intersected
int intersectionCount = 0;
for (int i = 0; i < 4; ++i) {
SkPoint intersect;
if (intersect_line_segments(points[i], points[i == 3 ? 0 : i + 1],
lines[0], lines[1], &intersect)) {
// If the intersected point is the same as the last found intersection, the line
// runs through a vertex, so don't double count it
bool duplicate = false;
for (int j = 0; j < intersectionCount; ++j) {
if (SkScalarNearlyZero((intersect - points[kS0 + j]).length())) {
duplicate = true;
break;
}
}
if (!duplicate) {
points[kS0 + intersectionCount] = intersect;
splitIndices[intersectionCount] = i;
intersectionCount++;
}
}
}
if (intersectionCount < 2) {
// Either the first line never intersected the quad (count == 0), or it intersected at a
// single vertex without going through quad area (count == 1), so check next line
return this->clipTile(
canvas, tileID, baseRect, quad, edgeAA, lines + 2, lineCount - 1, quadCount);
}
SkASSERT(intersectionCount == 2);
// Split the tile points into 2+ sub quads and recurse to the next lines, which may or may
// not further split the tile. Since the configurations are relatively simple, the possible
// splits are hardcoded below; subtile quad orderings are such that the sub tiles remain in
// clockwise order and match expected edges for QuadAAFlags. subtile indices refer to the
// 6-element 'points' array.
SkSTArray<3, std::array<int, 4>> subtiles;
int s2 = -1; // Index of an original vertex chosen for a artificial split
if (splitIndices[1] - splitIndices[0] == 2) {
// Opposite edges, so the split trivially forms 2 sub quads
if (splitIndices[0] == 0) {
subtiles.push_back({{kTL, kS0, kS1, kBL}});
subtiles.push_back({{kS0, kTR, kBR, kS1}});
} else {
subtiles.push_back({{kTL, kTR, kS0, kS1}});
subtiles.push_back({{kS1, kS0, kBR, kBL}});
}
} else {
// Adjacent edges, which makes for a more complicated split, since it forms a degenerate
// quad (triangle) and a pentagon that must be artificially split. The pentagon is split
// using one of the original vertices (remembered in 's2'), which adds an additional
// degenerate quad, but ensures there are no T-junctions.
switch(splitIndices[0]) {
case 0:
// Could be connected to edge 1 or edge 3
if (splitIndices[1] == 1) {
s2 = kBL;
subtiles.push_back({{kS0, kTR, kS1, kS0}}); // degenerate
subtiles.push_back({{kTL, kS0, edgeAA[0] ? kS0 : kBL, kBL}}); // degenerate
subtiles.push_back({{kS0, kS1, kBR, kBL}});
} else {
SkASSERT(splitIndices[1] == 3);
s2 = kBR;
subtiles.push_back({{kTL, kS0, kS1, kS1}}); // degenerate
subtiles.push_back({{kS1, edgeAA[3] ? kS1 : kBR, kBR, kBL}}); // degenerate
subtiles.push_back({{kS0, kTR, kBR, kS1}});
}
break;
case 1:
// Edge 0 handled above, should only be connected to edge 2
SkASSERT(splitIndices[1] == 2);
s2 = kTL;
subtiles.push_back({{kS0, kS0, kBR, kS1}}); // degenerate
subtiles.push_back({{kTL, kTR, kS0, edgeAA[1] ? kS0 : kTL}}); // degenerate
subtiles.push_back({{kTL, kS0, kS1, kBL}});
break;
case 2:
// Edge 1 handled above, should only be connected to edge 3
SkASSERT(splitIndices[1] == 3);
s2 = kTR;
subtiles.push_back({{kS1, kS0, kS0, kBL}}); // degenerate
subtiles.push_back({{edgeAA[2] ? kS0 : kTR, kTR, kBR, kS0}}); // degenerate
subtiles.push_back({{kTL, kTR, kS0, kS1}});
break;
case 3:
// Fall through, an adjacent edge split that hits edge 3 should have first found
// been found with edge 0 or edge 2 for the other end
default:
SkASSERT(false);
return 0;
}
}
SkPoint sub[4];
bool subAA[4];
int draws = 0;
for (int i = 0; i < subtiles.count(); ++i) {
// Fill in the quad points and update edge AA rules for new interior edges
for (int j = 0; j < 4; ++j) {
int p = subtiles[i][j];
sub[j] = points[p];
int np = j == 3 ? subtiles[i][0] : subtiles[i][j + 1];
// The "new" edges are the edges that connect between the two split points or
// between a split point and the chosen s2 point. Otherwise the edge remains aligned
// with the original shape, so should preserve the AA setting.
if ((p >= kS0 && (np == s2 || np >= kS0)) ||
((np >= kS0) && (p == s2 || p >= kS0))) {
// New edge
subAA[j] = false;
} else {
// The subtiles indices were arranged so that their edge ordering was still top,
// right, bottom, left so 'j' can be used to access edgeAA
subAA[j] = edgeAA[j];
}
}
// Split the sub quad with the next line
draws += this->clipTile(canvas, tileID, baseRect, sub, subAA, lines + 2, lineCount - 1,
quadCount);
}
return draws;
}
};
static constexpr int kMatrixCount = 5;
class CompositorGM : public skiagm::GM {
public:
CompositorGM(const char* name, sk_sp<ClipTileRenderer> renderer)
: fName(name) {
fRenderers.push_back(std::move(renderer));
}
CompositorGM(const char* name, const SkTArray<sk_sp<ClipTileRenderer>> renderers)
: fRenderers(renderers)
, fName(name) {}
protected:
SkISize onISize() override {
// The GM draws a grid of renderers (rows) x transforms (col). Within each cell, the
// renderer draws the transformed tile grid, which is approximately
// (kColCount*kTileWidth, kRowCount*kTileHeight), although it has additional line
// visualizations and can be transformed outside of those rectangular bounds (i.e. persp),
// so pad the cell dimensions to be conservative. Must also account for the banner text.
static constexpr SkScalar kCellWidth = 1.3f * kColCount * kTileWidth;
static constexpr SkScalar kCellHeight = 1.3f * kRowCount * kTileHeight;
return SkISize::Make(SkScalarRoundToInt(kCellWidth * kMatrixCount + 175.f),
SkScalarRoundToInt(kCellHeight * fRenderers.count() + 75.f));
}
SkString onShortName() override {
SkString fullName;
fullName.appendf("compositor_quads_%s", fName.c_str());
return fullName;
}
void onOnceBeforeDraw() override {
this->configureMatrices();
}
void onDraw(SkCanvas* canvas) override {
static constexpr SkScalar kGap = 40.f;
static constexpr SkScalar kBannerWidth = 120.f;
static constexpr SkScalar kOffset = 15.f;
SkTArray<int> drawCounts(fRenderers.count());
drawCounts.push_back_n(fRenderers.count(), 0);
canvas->save();
canvas->translate(kOffset + kBannerWidth, kOffset);
for (int i = 0; i < fMatrices.count(); ++i) {
canvas->save();
draw_text(canvas, fMatrixNames[i].c_str());
canvas->translate(0.f, kGap);
for (int j = 0; j < fRenderers.count(); ++j) {
canvas->save();
draw_tile_boundaries(canvas, fMatrices[i]);
draw_clipping_boundaries(canvas, fMatrices[i]);
canvas->concat(fMatrices[i]);
drawCounts[j] += fRenderers[j]->drawTiles(canvas);
canvas->restore();
// And advance to the next row
canvas->translate(0.f, kGap + kRowCount * kTileHeight);
}
// Reset back to the left edge
canvas->restore();
// And advance to the next column
canvas->translate(kGap + kColCount * kTileWidth, 0.f);
}
canvas->restore();
// Print a row header, with total draw counts
canvas->save();
canvas->translate(kOffset, kGap + 0.5f * kRowCount * kTileHeight);
for (int j = 0; j < fRenderers.count(); ++j) {
fRenderers[j]->drawBanner(canvas);
canvas->translate(0.f, 15.f);
draw_text(canvas, SkStringPrintf("Draws = %d", drawCounts[j]).c_str());
canvas->translate(0.f, kGap + kRowCount * kTileHeight);
}
canvas->restore();
}
private:
SkTArray<sk_sp<ClipTileRenderer>> fRenderers;
SkTArray<SkMatrix> fMatrices;
SkTArray<SkString> fMatrixNames;
SkString fName;
void configureMatrices() {
fMatrices.reset();
fMatrixNames.reset();
fMatrices.push_back_n(kMatrixCount);
// Identity
fMatrices[0].setIdentity();
fMatrixNames.push_back(SkString("Identity"));
// Translate/scale
fMatrices[1].setTranslate(5.5f, 20.25f);
fMatrices[1].postScale(.9f, .7f);
fMatrixNames.push_back(SkString("T+S"));
// Rotation
fMatrices[2].setRotate(20.0f);
fMatrices[2].preTranslate(15.f, -20.f);
fMatrixNames.push_back(SkString("Rotate"));
// Skew
fMatrices[3].setSkew(.5f, .25f);
fMatrices[3].preTranslate(-30.f, 0.f);
fMatrixNames.push_back(SkString("Skew"));
// 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(fMatrices[4].setPolyToPoly(src, dst, 4));
fMatrices[4].preTranslate(0.f, 10.f);
fMatrixNames.push_back(SkString("Perspective"));
SkASSERT(fMatrices.count() == fMatrixNames.count());
}
typedef skiagm::GM INHERITED;
};
////////////////////////////////////////////////////////////////////////////////////////////////
// Implementations of TileRenderer that color the clipped tiles in various ways
////////////////////////////////////////////////////////////////////////////////////////////////
class DebugTileRenderer : public ClipTileRenderer {
public:
static sk_sp<ClipTileRenderer> Make() {
// Since aa override is disabled, the quad flags arg doesn't matter.
return sk_sp<ClipTileRenderer>(new DebugTileRenderer(SkCanvas::kAll_QuadAAFlags, false));
}
static sk_sp<ClipTileRenderer> MakeAA() {
return sk_sp<ClipTileRenderer>(new DebugTileRenderer(SkCanvas::kAll_QuadAAFlags, true));
}
static sk_sp<ClipTileRenderer> MakeNonAA() {
return sk_sp<ClipTileRenderer>(new DebugTileRenderer(SkCanvas::kNone_QuadAAFlags, true));
}
int drawTile(SkCanvas* canvas, const SkRect& rect, const SkPoint clip[4], const bool edgeAA[4],
int tileID, int quadID) override {
// Colorize the tile based on its grid position and quad ID
int i = tileID / kColCount;
int j = tileID % kColCount;
SkColor4f c = {(i + 1.f) / kRowCount, (j + 1.f) / kColCount, .4f, 1.f};
float alpha = quadID / 10.f;
c.fR = c.fR * (1 - alpha) + alpha;
c.fG = c.fG * (1 - alpha) + alpha;
c.fB = c.fB * (1 - alpha) + alpha;
c.fA = c.fA * (1 - alpha) + alpha;
SkCanvas::QuadAAFlags aaFlags = fEnableAAOverride ? fAAOverride : this->maskToFlags(edgeAA);
canvas->experimental_DrawEdgeAAQuad(
rect, clip, aaFlags, c.toSkColor(), SkBlendMode::kSrcOver);
return 1;
}
void drawBanner(SkCanvas* canvas) override {
draw_text(canvas, "Edge AA");
canvas->translate(0.f, 15.f);
SkString config;
static const char* kFormat = "Ext(%s) - Int(%s)";
if (fEnableAAOverride) {
SkASSERT(fAAOverride == SkCanvas::kAll_QuadAAFlags ||
fAAOverride == SkCanvas::kNone_QuadAAFlags);
if (fAAOverride == SkCanvas::kAll_QuadAAFlags) {
config.appendf(kFormat, "yes", "yes");
} else {
config.appendf(kFormat, "no", "no");
}
} else {
config.appendf(kFormat, "yes", "no");
}
draw_text(canvas, config.c_str());
}
private:
SkCanvas::QuadAAFlags fAAOverride;
bool fEnableAAOverride;
DebugTileRenderer(SkCanvas::QuadAAFlags aa, bool enableAAOverrde)
: fAAOverride(aa)
, fEnableAAOverride(enableAAOverrde) {}
typedef ClipTileRenderer INHERITED;
};
// Tests tmp_drawEdgeAAQuad
class SolidColorRenderer : public ClipTileRenderer {
public:
static sk_sp<ClipTileRenderer> Make(const SkColor4f& color) {
return sk_sp<ClipTileRenderer>(new SolidColorRenderer(color));
}
int drawTile(SkCanvas* canvas, const SkRect& rect, const SkPoint clip[4], const bool edgeAA[4],
int tileID, int quadID) override {
canvas->experimental_DrawEdgeAAQuad(rect, clip, this->maskToFlags(edgeAA),
fColor.toSkColor(), SkBlendMode::kSrcOver);
return 1;
}
void drawBanner(SkCanvas* canvas) override {
draw_text(canvas, "Solid Color");
}
private:
SkColor4f fColor;
SolidColorRenderer(const SkColor4f& color) : fColor(color) {}
typedef ClipTileRenderer INHERITED;
};
// Tests drawEdgeAAImageSet(), but can batch the entries together in different ways
class TextureSetRenderer : public ClipTileRenderer {
public:
static sk_sp<ClipTileRenderer> MakeUnbatched(sk_sp<SkImage> image) {
return Make("Texture", "", std::move(image), nullptr, nullptr, nullptr, nullptr,
1.f, true, 0);
}
static sk_sp<ClipTileRenderer> MakeBatched(sk_sp<SkImage> image, int transformCount) {
const char* subtitle = transformCount == 0 ? "" : "w/ xforms";
return Make("Texture Set", subtitle, std::move(image), nullptr, nullptr, nullptr, nullptr,
1.f, false, transformCount);
}
static sk_sp<ClipTileRenderer> MakeShader(const char* name, sk_sp<SkImage> image,
sk_sp<SkShader> shader, bool local) {
return Make("Shader", name, std::move(image), std::move(shader),
nullptr, nullptr, nullptr, 1.f, local, 0);
}
static sk_sp<ClipTileRenderer> MakeColorFilter(const char* name, sk_sp<SkImage> image,
sk_sp<SkColorFilter> filter) {
return Make("Color Filter", name, std::move(image), nullptr, std::move(filter), nullptr,
nullptr, 1.f, false, 0);
}
static sk_sp<ClipTileRenderer> MakeImageFilter(const char* name, sk_sp<SkImage> image,
sk_sp<SkImageFilter> filter) {
return Make("Image Filter", name, std::move(image), nullptr, nullptr, std::move(filter),
nullptr, 1.f, false, 0);
}
static sk_sp<ClipTileRenderer> MakeMaskFilter(const char* name, sk_sp<SkImage> image,
sk_sp<SkMaskFilter> filter) {
return Make("Mask Filter", name, std::move(image), nullptr, nullptr, nullptr,
std::move(filter), 1.f, false, 0);
}
static sk_sp<ClipTileRenderer> MakeAlpha(sk_sp<SkImage> image, SkScalar alpha) {
return Make("Alpha", SkStringPrintf("a = %.2f", alpha).c_str(), std::move(image), nullptr,
nullptr, nullptr, nullptr, alpha, false, 0);
}
static sk_sp<ClipTileRenderer> Make(const char* topBanner, const char* bottomBanner,
sk_sp<SkImage> image, sk_sp<SkShader> shader,
sk_sp<SkColorFilter> colorFilter,
sk_sp<SkImageFilter> imageFilter,
sk_sp<SkMaskFilter> maskFilter, SkScalar paintAlpha,
bool resetAfterEachQuad, int transformCount) {
return sk_sp<ClipTileRenderer>(new TextureSetRenderer(topBanner, bottomBanner,
std::move(image), std::move(shader), std::move(colorFilter), std::move(imageFilter),
std::move(maskFilter), paintAlpha, resetAfterEachQuad, transformCount));
}
int drawTiles(SkCanvas* canvas) override {
int draws = this->INHERITED::drawTiles(canvas);
// Push the last tile set
draws += this->drawAndReset(canvas);
return draws;
}
int drawTile(SkCanvas* canvas, const SkRect& rect, const SkPoint clip[4], const bool edgeAA[4],
int tileID, int quadID) override {
// Now don't actually draw the tile, accumulate it in the growing entry set
bool hasClip = false;
if (clip) {
// Record the four points into fDstClips
fDstClips.push_back_n(4, clip);
hasClip = true;
}
int matrixIdx = -1;
if (!fResetEachQuad && fTransformBatchCount > 0) {
// Handle transform batching. This works by capturing the CTM of the first tile draw,
// and then calculate the difference between that and future CTMs for later tiles.
if (fPreViewMatrices.count() == 0) {
fBaseCTM = canvas->getTotalMatrix();
fPreViewMatrices.push_back(SkMatrix::I());
matrixIdx = 0;
} else {
// Calculate matrix s.t. getTotalMatrix() = fBaseCTM * M
SkMatrix invBase;
if (!fBaseCTM.invert(&invBase)) {
SkDebugf("Cannot invert CTM, transform batching will not be correct.\n");
} else {
SkMatrix preView = SkMatrix::Concat(invBase, canvas->getTotalMatrix());
if (preView != fPreViewMatrices[fPreViewMatrices.count() - 1]) {
// Add the new matrix
fPreViewMatrices.push_back(preView);
} // else re-use the last matrix
matrixIdx = fPreViewMatrices.count() - 1;
}
}
}
// This acts like the whole image is rendered over the entire tile grid, so derive local
// coordinates from 'rect', based on the grid to image transform.
SkMatrix gridToImage = SkMatrix::MakeRectToRect(SkRect::MakeWH(kColCount * kTileWidth,
kRowCount * kTileHeight),
SkRect::MakeWH(fImage->width(),
fImage->height()),
SkMatrix::kFill_ScaleToFit);
SkRect localRect = gridToImage.mapRect(rect);
// drawTextureSet automatically derives appropriate local quad from localRect if clipPtr
// is not null.
fSetEntries.push_back(
{fImage, localRect, rect, matrixIdx, 1.f, this->maskToFlags(edgeAA), hasClip});
if (fResetEachQuad) {
// Only ever draw one entry at a time
return this->drawAndReset(canvas);
} else {
return 0;
}
}
void drawBanner(SkCanvas* canvas) override {
if (fTopBanner.size() > 0) {
draw_text(canvas, fTopBanner.c_str());
}
canvas->translate(0.f, 15.f);
if (fBottomBanner.size() > 0) {
draw_text(canvas, fBottomBanner.c_str());
}
}
private:
SkString fTopBanner;
SkString fBottomBanner;
sk_sp<SkImage> fImage;
sk_sp<SkShader> fShader;
sk_sp<SkColorFilter> fColorFilter;
sk_sp<SkImageFilter> fImageFilter;
sk_sp<SkMaskFilter> fMaskFilter;
SkScalar fPaintAlpha;
// Batching rules
bool fResetEachQuad;
int fTransformBatchCount;
SkTArray<SkPoint> fDstClips;
SkTArray<SkMatrix> fPreViewMatrices;
SkTArray<SkCanvas::ImageSetEntry> fSetEntries;
SkMatrix fBaseCTM;
int fBatchCount;
TextureSetRenderer(const char* topBanner,
const char* bottomBanner,
sk_sp<SkImage> image,
sk_sp<SkShader> shader,
sk_sp<SkColorFilter> colorFilter,
sk_sp<SkImageFilter> imageFilter,
sk_sp<SkMaskFilter> maskFilter,
SkScalar paintAlpha,
bool resetEachQuad,
int transformBatchCount)
: fTopBanner(topBanner)
, fBottomBanner(bottomBanner)
, fImage(std::move(image))
, fShader(std::move(shader))
, fColorFilter(std::move(colorFilter))
, fImageFilter(std::move(imageFilter))
, fMaskFilter(std::move(maskFilter))
, fPaintAlpha(paintAlpha)
, fResetEachQuad(resetEachQuad)
, fTransformBatchCount(transformBatchCount)
, fBatchCount(0) {
SkASSERT(transformBatchCount >= 0 && (!resetEachQuad || transformBatchCount == 0));
}
void configureTilePaint(const SkRect& rect, SkPaint* paint) const {
paint->setAntiAlias(true);
paint->setFilterQuality(kLow_SkFilterQuality);
paint->setBlendMode(SkBlendMode::kSrcOver);
// Send non-white RGB, that should be ignored
paint->setColor4f({1.f, 0.4f, 0.25f, fPaintAlpha}, nullptr);
if (fShader) {
if (fResetEachQuad) {
// Apply a local transform in the shader to map from the tile rectangle to (0,0,w,h)
static const SkRect kTarget = SkRect::MakeWH(kTileWidth, kTileHeight);
SkMatrix local = SkMatrix::MakeRectToRect(kTarget, rect,
SkMatrix::kFill_ScaleToFit);
paint->setShader(fShader->makeWithLocalMatrix(local));
} else {
paint->setShader(fShader);
}
}
paint->setColorFilter(fColorFilter);
paint->setImageFilter(fImageFilter);
paint->setMaskFilter(fMaskFilter);
}
int drawAndReset(SkCanvas* canvas) {
// Early out if there's nothing to draw
if (fSetEntries.count() == 0) {
SkASSERT(fDstClips.count() == 0 && fPreViewMatrices.count() == 0);
return 0;
}
if (!fResetEachQuad && fTransformBatchCount > 0) {
// A batch is completed
fBatchCount++;
if (fBatchCount < fTransformBatchCount) {
// Haven't hit the point to submit yet, but end the current tile
return 0;
}
// Submitting all tiles back to where fBaseCTM was the canvas' matrix, while the
// canvas currently has the CTM of the last tile batch, so reset it.
canvas->setMatrix(fBaseCTM);
}
#ifdef SK_DEBUG
int expectedDstClipCount = 0;
for (int i = 0; i < fSetEntries.count(); ++i) {
expectedDstClipCount += 4 * fSetEntries[i].fHasClip;
SkASSERT(fSetEntries[i].fMatrixIndex < 0 ||
fSetEntries[i].fMatrixIndex < fPreViewMatrices.count());
}
SkASSERT(expectedDstClipCount == fDstClips.count());
#endif
SkPaint paint;
SkRect lastTileRect = fSetEntries[fSetEntries.count() - 1].fDstRect;
this->configureTilePaint(lastTileRect, &paint);
canvas->experimental_DrawEdgeAAImageSet(
fSetEntries.begin(), fSetEntries.count(), fDstClips.begin(),
fPreViewMatrices.begin(), &paint, SkCanvas::kFast_SrcRectConstraint);
// Reset for next tile
fDstClips.reset();
fPreViewMatrices.reset();
fSetEntries.reset();
fBatchCount = 0;
return 1;
}
typedef ClipTileRenderer INHERITED;
};
class YUVTextureSetRenderer : public ClipTileRenderer {
public:
static sk_sp<ClipTileRenderer> MakeFromJPEG(sk_sp<SkData> imageData) {
return sk_sp<ClipTileRenderer>(new YUVTextureSetRenderer(std::move(imageData)));
}
int drawTiles(SkCanvas* canvas) override {
// Refresh the SkImage at the start, so that it's not attempted for every set entry
if (fYUVData) {
fImage = fYUVData->refImage(canvas->getGrContext());
if (!fImage) {
return 0;
}
}
int draws = this->INHERITED::drawTiles(canvas);
// Push the last tile set
draws += this->drawAndReset(canvas);
return draws;
}
int drawTile(SkCanvas* canvas, const SkRect& rect, const SkPoint clip[4], const bool edgeAA[4],
int tileID, int quadID) override {
SkASSERT(fImage);
// Now don't actually draw the tile, accumulate it in the growing entry set
bool hasClip = false;
if (clip) {
// Record the four points into fDstClips
fDstClips.push_back_n(4, clip);
hasClip = true;
}
// This acts like the whole image is rendered over the entire tile grid, so derive local
// coordinates from 'rect', based on the grid to image transform.
SkMatrix gridToImage = SkMatrix::MakeRectToRect(SkRect::MakeWH(kColCount * kTileWidth,
kRowCount * kTileHeight),
SkRect::MakeWH(fImage->width(),
fImage->height()),
SkMatrix::kFill_ScaleToFit);
SkRect localRect = gridToImage.mapRect(rect);
// drawTextureSet automatically derives appropriate local quad from localRect if clipPtr
// is not null.
fSetEntries.push_back(
{fImage, localRect, rect, -1, 1.f, this->maskToFlags(edgeAA), hasClip});
return 0;
}
void drawBanner(SkCanvas* canvas) override {
draw_text(canvas, "Texture");
canvas->translate(0.f, 15.f);
draw_text(canvas, "YUV - GPU Only");
}
private:
std::unique_ptr<sk_gpu_test::LazyYUVImage> fYUVData;
// The last accessed SkImage from fYUVData, held here for easy access by drawTile
sk_sp<SkImage> fImage;
SkTArray<SkPoint> fDstClips;
SkTArray<SkCanvas::ImageSetEntry> fSetEntries;
YUVTextureSetRenderer(sk_sp<SkData> jpegData)
: fYUVData(sk_gpu_test::LazyYUVImage::Make(std::move(jpegData)))
, fImage(nullptr) {}
int drawAndReset(SkCanvas* canvas) {
// Early out if there's nothing to draw
if (fSetEntries.count() == 0) {
SkASSERT(fDstClips.count() == 0);
return 0;
}
#ifdef SK_DEBUG
int expectedDstClipCount = 0;
for (int i = 0; i < fSetEntries.count(); ++i) {
expectedDstClipCount += 4 * fSetEntries[i].fHasClip;
}
SkASSERT(expectedDstClipCount == fDstClips.count());
#endif
SkPaint paint;
paint.setAntiAlias(true);
paint.setFilterQuality(kLow_SkFilterQuality);
paint.setBlendMode(SkBlendMode::kSrcOver);
canvas->experimental_DrawEdgeAAImageSet(
fSetEntries.begin(), fSetEntries.count(), fDstClips.begin(), nullptr, &paint,
SkCanvas::kFast_SrcRectConstraint);
// Reset for next tile
fDstClips.reset();
fSetEntries.reset();
return 1;
}
typedef ClipTileRenderer INHERITED;
};
static SkTArray<sk_sp<ClipTileRenderer>> make_debug_renderers() {
SkTArray<sk_sp<ClipTileRenderer>> renderers;
renderers.push_back(DebugTileRenderer::Make());
renderers.push_back(DebugTileRenderer::MakeAA());
renderers.push_back(DebugTileRenderer::MakeNonAA());
return renderers;
}
static SkTArray<sk_sp<ClipTileRenderer>> make_shader_renderers() {
static constexpr SkPoint kPts[] = { {0.f, 0.f}, {0.25f * kTileWidth, 0.25f * kTileHeight} };
static constexpr SkColor kColors[] = { SK_ColorBLUE, SK_ColorWHITE };
auto gradient = SkGradientShader::MakeLinear(kPts, kColors, nullptr, 2,
SkTileMode::kMirror);
auto info = SkImageInfo::Make(1, 1, kAlpha_8_SkColorType, kOpaque_SkAlphaType);
SkBitmap bm;
bm.allocPixels(info);
bm.eraseColor(SK_ColorWHITE);
sk_sp<SkImage> image = SkImage::MakeFromBitmap(bm);
SkTArray<sk_sp<ClipTileRenderer>> renderers;
renderers.push_back(TextureSetRenderer::MakeShader("Gradient", image, gradient, false));
renderers.push_back(TextureSetRenderer::MakeShader("Local Gradient", image, gradient, true));
return renderers;
}
static SkTArray<sk_sp<ClipTileRenderer>> make_image_renderers() {
sk_sp<SkImage> mandrill = GetResourceAsImage("images/mandrill_512.png");
SkTArray<sk_sp<ClipTileRenderer>> renderers;
renderers.push_back(TextureSetRenderer::MakeUnbatched(mandrill));
renderers.push_back(TextureSetRenderer::MakeBatched(mandrill, 0));
renderers.push_back(TextureSetRenderer::MakeBatched(mandrill, kMatrixCount));
renderers.push_back(YUVTextureSetRenderer::MakeFromJPEG(
GetResourceAsData("images/mandrill_h1v1.jpg")));
return renderers;
}
static SkTArray<sk_sp<ClipTileRenderer>> make_filtered_renderers() {
sk_sp<SkImage> mandrill = GetResourceAsImage("images/mandrill_512.png");
SkColorMatrix cm;
cm.setSaturation(10);
sk_sp<SkColorFilter> colorFilter = SkColorFilters::Matrix(cm);
sk_sp<SkImageFilter> imageFilter = SkDilateImageFilter::Make(8, 8, nullptr);
static constexpr SkColor kAlphas[] = { SK_ColorTRANSPARENT, SK_ColorBLACK };
auto alphaGradient = SkGradientShader::MakeRadial(
{0.5f * kTileWidth * kColCount, 0.5f * kTileHeight * kRowCount},
0.25f * kTileWidth * kColCount, kAlphas, nullptr, 2, SkTileMode::kClamp);
sk_sp<SkMaskFilter> maskFilter = SkShaderMaskFilter::Make(std::move(alphaGradient));
SkTArray<sk_sp<ClipTileRenderer>> renderers;
renderers.push_back(TextureSetRenderer::MakeAlpha(mandrill, 0.5f));
renderers.push_back(TextureSetRenderer::MakeColorFilter("Saturation", mandrill,
std::move(colorFilter)));
// NOTE: won't draw correctly until SkCanvas' AutoLoopers are used to handle image filters
renderers.push_back(TextureSetRenderer::MakeImageFilter("Dilate", mandrill,
std::move(imageFilter)));
renderers.push_back(TextureSetRenderer::MakeMaskFilter("Shader", mandrill,
std::move(maskFilter)));
// NOTE: blur mask filters do work (tested locally), but visually they don't make much
// sense, since each quad is blurred independently
return renderers;
}
DEF_GM(return new CompositorGM("debug", make_debug_renderers());)
DEF_GM(return new CompositorGM("color", SolidColorRenderer::Make({.2f, .8f, .3f, 1.f}));)
DEF_GM(return new CompositorGM("shader", make_shader_renderers());)
DEF_GM(return new CompositorGM("image", make_image_renderers());)
DEF_GM(return new CompositorGM("filter", make_filtered_renderers());)
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