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skia2/tools/remote_demo.cpp
Herb Derby ca9c879900 Collapse metrics and image into a single call. 
BUG=skia:7515

Change-Id: I518f6010a2f6265666de22f0eaa021f2e330ceaa
Reviewed-on: https://skia-review.googlesource.com/103023
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
2018-02-05 21:04:11 +00:00

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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 "SkCanvas.h"
#include "SkPathEffect.h"
#include "SkMaskFilter.h"
#include "SkData.h"
#include "SkDescriptor.h"
#include "SkGraphics.h"
#include "SkSemaphore.h"
#include "SkPictureRecorder.h"
#include "SkSerialProcs.h"
#include "SkSurface.h"
#include "SkTypeface.h"
#include "SkWriteBuffer.h"
#include <chrono>
#include <ctype.h>
#include <err.h>
#include <memory>
#include <stdio.h>
#include <thread>
#include <iostream>
#include <unordered_map>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <sys/mman.h>
#include "SkTypeface_remote.h"
#include "SkRemoteGlyphCache.h"
#include "SkMakeUnique.h"
static const size_t kPageSize = 4096;
static bool gUseGpu = true;
static bool gPurgeFontCaches = true;
static bool gUseProcess = true;
enum class OpCode : int32_t {
kFontMetrics = 0,
kGlyphMetrics = 1,
kGlyphImage = 2,
kGlyphPath = 3,
kGlyphMetricsAndImage = 4,
};
class Op {
public:
Op(OpCode opCode, SkFontID typefaceId, const SkScalerContextRec& rec)
: opCode{opCode}
, typefaceId{typefaceId}
, descriptor{rec} { }
const OpCode opCode;
const SkFontID typefaceId;
const SkScalerContextRecDescriptor descriptor;
union {
// op 0
SkPaint::FontMetrics fontMetrics;
// op 1 and 2
SkGlyph glyph;
// op 3
struct {
SkGlyphID glyphId;
size_t pathSize;
};
};
};
class RemoteScalerContextFIFO : public SkRemoteScalerContext {
public:
explicit RemoteScalerContextFIFO(int readFd, int writeFd)
: fReadFd{readFd}
, fWriteFd{writeFd} { }
void generateFontMetrics(const SkTypefaceProxy& tf,
const SkScalerContextRec& rec,
SkPaint::FontMetrics* metrics) override {
Op* op = this->createOp(OpCode::kFontMetrics, tf, rec);
write(fWriteFd, fBuffer, sizeof(*op));
read(fReadFd, fBuffer, sizeof(fBuffer));
memcpy(metrics, &op->fontMetrics, sizeof(op->fontMetrics));
op->~Op();
}
void generateMetrics(const SkTypefaceProxy& tf,
const SkScalerContextRec& rec,
SkGlyph* glyph) override {
Op* op = this->createOp(OpCode::kGlyphMetrics, tf, rec);
memcpy(&op->glyph, glyph, sizeof(*glyph));
write(fWriteFd, fBuffer, sizeof(*op));
read(fReadFd, fBuffer, sizeof(fBuffer));
memcpy(glyph, &op->glyph, sizeof(op->glyph));
op->~Op();
}
void generateImage(const SkTypefaceProxy& tf,
const SkScalerContextRec& rec,
const SkGlyph& glyph) override {
SK_ABORT("generateImage should not be called.");
Op* op = this->createOp(OpCode::kGlyphImage, tf, rec);
memcpy(&op->glyph, &glyph, sizeof(glyph));
write(fWriteFd, fBuffer, sizeof(*op));
read(fReadFd, fBuffer, sizeof(fBuffer));
memcpy(glyph.fImage, fBuffer + sizeof(Op), glyph.rowBytes() * glyph.fHeight);
op->~Op();
}
void generateMetricsAndImage(const SkTypefaceProxy& tf,
const SkScalerContextRec& rec,
SkArenaAlloc* alloc,
SkGlyph* glyph) override {
Op* op = this->createOp(OpCode::kGlyphMetricsAndImage, tf, rec);
memcpy(&op->glyph, glyph, sizeof(op->glyph));
write(fWriteFd, fBuffer, sizeof(*op));
read(fReadFd, fBuffer, sizeof(fBuffer));
memcpy(glyph, &op->glyph, sizeof(*glyph));
glyph->allocImage(alloc);
memcpy(glyph->fImage, fBuffer + sizeof(Op), glyph->rowBytes() * glyph->fHeight);
op->~Op();
}
void generatePath(const SkTypefaceProxy& tf,
const SkScalerContextRec& rec,
SkGlyphID glyph, SkPath* path) override {
Op* op = this->createOp(OpCode::kGlyphPath, tf, rec);
op->glyphId = glyph;
write(fWriteFd, fBuffer, sizeof(*op));
read(fReadFd, fBuffer, sizeof(fBuffer));
path->readFromMemory(fBuffer + sizeof(Op), op->pathSize);
op->~Op();
}
private:
Op* createOp(OpCode opCode, const SkTypefaceProxy& tf,
const SkScalerContextRec& rec) {
Op* op = new (fBuffer) Op(opCode, tf.fontID(), rec);
return op;
}
const int fReadFd,
fWriteFd;
uint8_t fBuffer[1024 * kPageSize];
};
static void final_draw(std::string outFilename,
SkDeserialProcs* procs,
uint8_t* picData,
size_t picSize) {
auto pic = SkPicture::MakeFromData(picData, picSize, procs);
auto cullRect = pic->cullRect();
auto r = cullRect.round();
auto s = SkSurface::MakeRasterN32Premul(r.width(), r.height());
auto c = s->getCanvas();
auto picUnderTest = SkPicture::MakeFromData(picData, picSize, procs);
std::chrono::duration<double> total_seconds{0.0};
for (int i = 0; i < 20; i++) {
if (gPurgeFontCaches) {
SkGraphics::PurgeFontCache();
}
auto start = std::chrono::high_resolution_clock::now();
c->drawPicture(picUnderTest);
auto end = std::chrono::high_resolution_clock::now();
std::chrono::duration<double> elapsed_seconds = end-start;
total_seconds += elapsed_seconds;
}
std::cout << "useProcess: " << gUseProcess
<< " useGPU: " << gUseGpu
<< " purgeCache: " << gPurgeFontCaches << std::endl;
std::cerr << "elapsed time: " << total_seconds.count() << "s\n";
auto i = s->makeImageSnapshot();
auto data = i->encodeToData();
SkFILEWStream f(outFilename.c_str());
f.write(data->data(), data->size());
}
static void gpu(int readFd, int writeFd) {
size_t picSize = 0;
ssize_t r = read(readFd, &picSize, sizeof(picSize));
if (r > 0) {
static constexpr size_t kBufferSize = 10 * 1024 * kPageSize;
std::unique_ptr<uint8_t[]> picBuffer{new uint8_t[kBufferSize]};
size_t readSoFar = 0;
while (readSoFar < picSize) {
ssize_t readSize;
if ((readSize = read(readFd, &picBuffer[readSoFar], kBufferSize - readSoFar)) <= 0) {
if (readSize == 0) return;
err(1, "gpu pic read error %d", errno);
}
readSoFar += readSize;
}
SkRemoteGlyphCacheGPU rc{
skstd::make_unique<RemoteScalerContextFIFO>(readFd, writeFd)
};
SkDeserialProcs procs;
rc.prepareDeserializeProcs(&procs);
final_draw("test.png", &procs, picBuffer.get(), picSize);
}
close(writeFd);
close(readFd);
}
static int renderer(
const std::string& skpName, int readFd, int writeFd)
{
std::string prefix{"skps/"};
std::string fileName{prefix + skpName + ".skp"};
auto skp = SkData::MakeFromFileName(fileName.c_str());
std::cout << "skp stream is " << skp->size() << " bytes long " << std::endl;
SkRemoteGlyphCacheRenderer rc;
SkSerialProcs procs;
sk_sp<SkData> stream;
if (gUseGpu) {
auto pic = SkPicture::MakeFromData(skp.get());
rc.prepareSerializeProcs(&procs);
stream = pic->serialize(&procs);
} else {
stream = skp;
}
std::cout << "stream is " << stream->size() << " bytes long" << std::endl;
size_t picSize = stream->size();
uint8_t* picBuffer = (uint8_t*) stream->data();
if (!gUseGpu) {
final_draw("test-direct.png", nullptr, picBuffer, picSize);
close(writeFd);
close(readFd);
return 0;
}
write(writeFd, &picSize, sizeof(picSize));
size_t writeSoFar = 0;
while (writeSoFar < picSize) {
ssize_t writeSize = write(writeFd, &picBuffer[writeSoFar], picSize - writeSoFar);
if (writeSize <= 0) {
if (writeSize == 0) {
std::cout << "Exit" << std::endl;
return 1;
}
perror("Can't write picture from render to GPU ");
return 1;
}
writeSoFar += writeSize;
}
std::cout << "Waiting for scaler context ops." << std::endl;
static constexpr size_t kBufferSize = 1024 * kPageSize;
std::unique_ptr<uint8_t[]> glyphBuffer{new uint8_t[kBufferSize]};
Op* op = (Op*)glyphBuffer.get();
while (true) {
ssize_t size = read(readFd, glyphBuffer.get(), sizeof(*op));
if (size <= 0) { std::cout << "Exit op loop" << std::endl; break;}
size_t writeSize = sizeof(*op);
auto sc = rc.generateScalerContext(op->descriptor, op->typefaceId);
switch (op->opCode) {
case OpCode::kFontMetrics : {
sc->getFontMetrics(&op->fontMetrics);
break;
}
case OpCode::kGlyphMetrics : {
sc->getMetrics(&op->glyph);
break;
}
case OpCode::kGlyphImage : {
// TODO: check for buffer overflow.
op->glyph.fImage = &glyphBuffer[sizeof(Op)];
sc->getImage(op->glyph);
writeSize += op->glyph.rowBytes() * op->glyph.fHeight;
break;
}
case OpCode::kGlyphPath : {
// TODO: check for buffer overflow.
SkPath path;
sc->getPath(op->glyphId, &path);
op->pathSize = path.writeToMemory(&glyphBuffer[sizeof(Op)]);
writeSize += op->pathSize;
break;
}
case OpCode::kGlyphMetricsAndImage : {
// TODO: check for buffer overflow.
sc->getMetrics(&op->glyph);
if (op->glyph.fWidth <= 0 || op->glyph.fWidth >= kMaxGlyphWidth) {
op->glyph.fImage = nullptr;
break;
}
op->glyph.fImage = &glyphBuffer[sizeof(Op)];
sc->getImage(op->glyph);
writeSize += op->glyph.rowBytes() * op->glyph.fHeight;
break;
}
default:
SK_ABORT("Bad op");
}
write(writeFd, glyphBuffer.get(), writeSize);
}
close(readFd);
close(writeFd);
std::cout << "Returning from render" << std::endl;
return 0;
}
enum direction : int {kRead = 0, kWrite = 1};
static void start_gpu(int render_to_gpu[2], int gpu_to_render[2]) {
std::cout << "gpu - Starting GPU" << std::endl;
close(gpu_to_render[kRead]);
close(render_to_gpu[kWrite]);
gpu(render_to_gpu[kRead], gpu_to_render[kWrite]);
}
static void start_render(std::string& skpName, int render_to_gpu[2], int gpu_to_render[2]) {
std::cout << "renderer - Starting Renderer" << std::endl;
close(render_to_gpu[kRead]);
close(gpu_to_render[kWrite]);
renderer(skpName, gpu_to_render[kRead], render_to_gpu[kWrite]);
}
int main(int argc, char** argv) {
std::string skpName = argc > 1 ? std::string{argv[1]} : std::string{"desk_nytimes"};
int mode = argc > 2 ? atoi(argv[2]) : -1;
printf("skp: %s\n", skpName.c_str());
int render_to_gpu[2],
gpu_to_render[2];
for (int m = 0; m < 8; m++) {
int r = pipe(render_to_gpu);
if (r < 0) {
perror("Can't write picture from render to GPU ");
return 1;
}
r = pipe(gpu_to_render);
if (r < 0) {
perror("Can't write picture from render to GPU ");
return 1;
}
gPurgeFontCaches = (m & 4) == 4;
gUseGpu = (m & 2) == 2;
gUseProcess = (m & 1) == 1;
if (mode >= 0 && mode < 8 && mode != m) {
continue;
}
if (gUseProcess) {
pid_t child = fork();
SkGraphics::Init();
if (child == 0) {
start_gpu(render_to_gpu, gpu_to_render);
} else {
start_render(skpName, render_to_gpu, gpu_to_render);
waitpid(child, nullptr, 0);
}
} else {
SkGraphics::Init();
std::thread(gpu, render_to_gpu[kRead], gpu_to_render[kWrite]).detach();
renderer(skpName, gpu_to_render[kRead], render_to_gpu[kWrite]);
}
}
return 0;
}
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