/*
 * Copyright 2006 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "include/core/SkGraphics.h"

#include "include/core/SkCanvas.h"
#include "include/private/base/SkMath.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkOpenTypeSVGDecoder.h"
#include "include/core/SkPath.h"
#include "include/core/SkPathEffect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkShader.h"
#include "include/core/SkStream.h"
#include "include/core/SkTime.h"
#include "src/core/SkBlitter.h"
#include "src/core/SkCpu.h"
#include "src/core/SkGeometry.h"
#include "src/core/SkImageFilter_Base.h"
#include "src/core/SkOpts.h"
#include "src/core/SkResourceCache.h"
#include "src/core/SkScalerContext.h"
#include "src/core/SkStrikeCache.h"
#include "src/core/SkTSearch.h"
#include "src/core/SkTypefaceCache.h"

#include <stdlib.h>

void SkGraphics::Init() {
    // SkGraphics::Init() must be thread-safe and idempotent.
    SkCpu::CacheRuntimeFeatures();
    SkOpts::Init();
}

///////////////////////////////////////////////////////////////////////////////

void SkGraphics::DumpMemoryStatistics(SkTraceMemoryDump* dump) {
  SkResourceCache::DumpMemoryStatistics(dump);
  SkStrikeCache::DumpMemoryStatistics(dump);
}

void SkGraphics::PurgeAllCaches() {
    SkGraphics::PurgeFontCache();
    SkGraphics::PurgeResourceCache();
    SkImageFilter_Base::PurgeCache();
}

///////////////////////////////////////////////////////////////////////////////

static const char kFontCacheLimitStr[] = "font-cache-limit";
static const size_t kFontCacheLimitLen = sizeof(kFontCacheLimitStr) - 1;

static const struct {
    const char* fStr;
    size_t fLen;
    size_t (*fFunc)(size_t);
} gFlags[] = {
    { kFontCacheLimitStr, kFontCacheLimitLen, SkGraphics::SetFontCacheLimit }
};

/* flags are of the form param; or param=value; */
void SkGraphics::SetFlags(const char* flags) {
    if (!flags) {
        return;
    }
    const char* nextSemi;
    do {
        size_t len = strlen(flags);
        const char* paramEnd = flags + len;
        const char* nextEqual = strchr(flags, '=');
        if (nextEqual && paramEnd > nextEqual) {
            paramEnd = nextEqual;
        }
        nextSemi = strchr(flags, ';');
        if (nextSemi && paramEnd > nextSemi) {
            paramEnd = nextSemi;
        }
        size_t paramLen = paramEnd - flags;
        for (int i = 0; i < (int)std::size(gFlags); ++i) {
            if (paramLen != gFlags[i].fLen) {
                continue;
            }
            if (strncmp(flags, gFlags[i].fStr, paramLen) == 0) {
                size_t val = 0;
                if (nextEqual) {
                    val = (size_t) atoi(nextEqual + 1);
                }
                (gFlags[i].fFunc)(val);
                break;
            }
        }
        flags = nextSemi + 1;
    } while (nextSemi);
}

size_t SkGraphics::GetFontCacheLimit() {
    return SkStrikeCache::GlobalStrikeCache()->getCacheSizeLimit();
}

size_t SkGraphics::SetFontCacheLimit(size_t bytes) {
    return SkStrikeCache::GlobalStrikeCache()->setCacheSizeLimit(bytes);
}

size_t SkGraphics::GetFontCacheUsed() {
    return SkStrikeCache::GlobalStrikeCache()->getTotalMemoryUsed();
}

int SkGraphics::GetFontCacheCountLimit() {
    return SkStrikeCache::GlobalStrikeCache()->getCacheCountLimit();
}

int SkGraphics::SetFontCacheCountLimit(int count) {
    return SkStrikeCache::GlobalStrikeCache()->setCacheCountLimit(count);
}

int SkGraphics::GetFontCacheCountUsed() {
    return SkStrikeCache::GlobalStrikeCache()->getCacheCountUsed();
}

void SkGraphics::PurgeFontCache() {
    SkStrikeCache::GlobalStrikeCache()->purgeAll();
    SkTypefaceCache::PurgeAll();
}

static SkGraphics::OpenTypeSVGDecoderFactory gSVGDecoderFactory = nullptr;

SkGraphics::OpenTypeSVGDecoderFactory
SkGraphics::SetOpenTypeSVGDecoderFactory(OpenTypeSVGDecoderFactory svgDecoderFactory) {
    OpenTypeSVGDecoderFactory old(gSVGDecoderFactory);
    gSVGDecoderFactory = svgDecoderFactory;
    return old;
}

SkGraphics::OpenTypeSVGDecoderFactory SkGraphics::GetOpenTypeSVGDecoderFactory() {
    return gSVGDecoderFactory;
}

static SkGraphics::VariableColrV1EnabledFunc gVariableCOLRv1EnabledFunc = nullptr;

/* static */
SkGraphics::VariableColrV1EnabledFunc SkGraphics::SetVariableColrV1EnabledFunc(
        VariableColrV1EnabledFunc variableCOLRV1EnabledFunc) {
    VariableColrV1EnabledFunc old = gVariableCOLRv1EnabledFunc;
    gVariableCOLRv1EnabledFunc = variableCOLRV1EnabledFunc;
    return old;
}

/* static */
bool SkGraphics::GetVariableColrV1Enabled() {
    return gVariableCOLRv1EnabledFunc ? gVariableCOLRv1EnabledFunc() : false;
}

extern bool gSkVMAllowJIT;

void SkGraphics::AllowJIT() {
    gSkVMAllowJIT = true;
}