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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "2D.h"

#ifdef USE_CAIRO
#include "DrawTargetCairo.h"
#include "ScaledFontBase.h"
#endif

#ifdef USE_SKIA
#include "DrawTargetSkia.h"
#include "ScaledFontBase.h"
#ifdef MOZ_ENABLE_FREETYPE
#include "ScaledFontFreetype.h"
#endif
#endif

#if defined(WIN32) && defined(USE_SKIA)
#include "ScaledFontWin.h"
#endif

#ifdef XP_MACOSX
#include "ScaledFontMac.h"
#endif


#ifdef XP_MACOSX
#include "DrawTargetCG.h"
#endif

#ifdef WIN32
#include "DrawTargetD2D.h"
#include "ScaledFontDWrite.h"
#include <d3d10_1.h>
#endif

#include "DrawTargetDual.h"

#include "SourceSurfaceRawData.h"

#include "Logging.h"

#ifdef PR_LOGGING
PRLogModuleInfo *sGFX2DLog = PR_NewLogModule("gfx2d");
#endif

// The following code was largely taken from xpcom/glue/SSE.cpp and
// made a little simpler.
enum CPUIDRegister { eax = 0, ebx = 1, ecx = 2, edx = 3 };

#ifdef HAVE_CPUID_H

// cpuid.h is available on gcc 4.3 and higher on i386 and x86_64
#include <cpuid.h>

static bool
HasCPUIDBit(unsigned int level, CPUIDRegister reg, unsigned int bit)
{
  unsigned int regs[4];
  return __get_cpuid(level, &regs[0], &regs[1], &regs[2], &regs[3]) &&
         (regs[reg] & bit);
}

#define HAVE_CPU_DETECTION
#else

#if defined(_MSC_VER) && _MSC_VER >= 1600 && (defined(_M_IX86) || defined(_M_AMD64))
// MSVC 2005 or later supports __cpuid by intrin.h
// But it does't work on MSVC 2005 with SDK 7.1 (Bug 753772)
#include <intrin.h>

#define HAVE_CPU_DETECTION
#elif defined(__SUNPRO_CC) && (defined(__i386) || defined(__x86_64__))

// Define a function identical to MSVC function.
#ifdef __i386
static void
__cpuid(int CPUInfo[4], int InfoType)
{
  asm (
    "xchg %esi, %ebx\n"
    "cpuid\n"
    "movl %eax, (%edi)\n"
    "movl %ebx, 4(%edi)\n"
    "movl %ecx, 8(%edi)\n"
    "movl %edx, 12(%edi)\n"
    "xchg %esi, %ebx\n"
    :
    : "a"(InfoType), // %eax
      "D"(CPUInfo) // %edi
    : "%ecx", "%edx", "%esi"
  );
}
#else
static void
__cpuid(int CPUInfo[4], int InfoType)
{
  asm (
    "xchg %rsi, %rbx\n"
    "cpuid\n"
    "movl %eax, (%rdi)\n"
    "movl %ebx, 4(%rdi)\n"
    "movl %ecx, 8(%rdi)\n"
    "movl %edx, 12(%rdi)\n"
    "xchg %rsi, %rbx\n"
    :
    : "a"(InfoType), // %eax
      "D"(CPUInfo) // %rdi
    : "%ecx", "%edx", "%rsi"
  );
}

#define HAVE_CPU_DETECTION
#endif
#endif

#ifdef HAVE_CPU_DETECTION
static bool
HasCPUIDBit(unsigned int level, CPUIDRegister reg, unsigned int bit)
{
  // Check that the level in question is supported.
  volatile int regs[4];
  __cpuid((int *)regs, level & 0x80000000u);
  if (unsigned(regs[0]) < level)
    return false;
  __cpuid((int *)regs, level);
  return !!(unsigned(regs[reg]) & bit);
}
#endif
#endif

namespace mozilla {
namespace gfx {

// XXX - Need to define an API to set this.
int sGfxLogLevel = LOG_DEBUG;

#ifdef WIN32
ID3D10Device1 *Factory::mD3D10Device;
#endif

bool
Factory::HasSSE2()
{
#if defined(__SSE2__) || defined(_M_X64) || \
    (defined(_M_IX86_FP) && _M_IX86_FP >= 2)
  // gcc with -msse2 (default on OSX and x86-64)
  // cl.exe with -arch:SSE2 (default on x64 compiler)
  return true;
#elif defined(HAVE_CPU_DETECTION)
  return HasCPUIDBit(1u, edx, (1u<<26));
#else
  return false;
#endif
}

TemporaryRef<DrawTarget>
Factory::CreateDrawTarget(BackendType aBackend, const IntSize &aSize, SurfaceFormat aFormat)
{
  switch (aBackend) {
#ifdef WIN32
  case BACKEND_DIRECT2D:
    {
      RefPtr<DrawTargetD2D> newTarget;
      newTarget = new DrawTargetD2D();
      if (newTarget->Init(aSize, aFormat)) {
        return newTarget;
      }
      break;
    }
#elif defined XP_MACOSX
  case BACKEND_COREGRAPHICS:
  case BACKEND_COREGRAPHICS_ACCELERATED:
    {
      RefPtr<DrawTargetCG> newTarget;
      newTarget = new DrawTargetCG();
      if (newTarget->Init(aBackend, aSize, aFormat)) {
        return newTarget;
      }
      break;
    }
#endif
#ifdef USE_SKIA
  case BACKEND_SKIA:
    {
      RefPtr<DrawTargetSkia> newTarget;
      newTarget = new DrawTargetSkia();
      if (newTarget->Init(aSize, aFormat)) {
        return newTarget;
      }
      break;
    }
#endif
  default:
    gfxDebug() << "Invalid draw target type specified.";
    return nullptr;
  }

  gfxDebug() << "Failed to create DrawTarget, Type: " << aBackend << " Size: " << aSize;
  // Failed
  return nullptr;
}

TemporaryRef<DrawTarget>
Factory::CreateDrawTargetForData(BackendType aBackend, 
                                 unsigned char *aData, 
                                 const IntSize &aSize, 
                                 int32_t aStride, 
                                 SurfaceFormat aFormat)
{
  switch (aBackend) {
#ifdef USE_SKIA
  case BACKEND_SKIA:
    {
      RefPtr<DrawTargetSkia> newTarget;
      newTarget = new DrawTargetSkia();
      newTarget->Init(aData, aSize, aStride, aFormat);
      return newTarget;
    }
#endif
#ifdef XP_MACOSX
  case BACKEND_COREGRAPHICS:
    {
      RefPtr<DrawTargetCG> newTarget = new DrawTargetCG();
      if (newTarget->Init(aBackend, aData, aSize, aStride, aFormat))
        return newTarget;
      break;
    }
#endif
  default:
    gfxDebug() << "Invalid draw target type specified.";
    return nullptr;
  }

  gfxDebug() << "Failed to create DrawTarget, Type: " << aBackend << " Size: " << aSize;
  // Failed
  return nullptr;
}

TemporaryRef<ScaledFont>
Factory::CreateScaledFontForNativeFont(const NativeFont &aNativeFont, Float aSize)
{
  switch (aNativeFont.mType) {
#ifdef WIN32
  case NATIVE_FONT_DWRITE_FONT_FACE:
    {
      return new ScaledFontDWrite(static_cast<IDWriteFontFace*>(aNativeFont.mFont), aSize);
    }
  case NATIVE_FONT_GDI_FONT_FACE:
    {
      return new ScaledFontWin(static_cast<LOGFONT*>(aNativeFont.mFont), aSize);
    }
#endif
#ifdef XP_MACOSX
  case NATIVE_FONT_MAC_FONT_FACE:
    {
      return new ScaledFontMac(static_cast<CGFontRef>(aNativeFont.mFont), aSize);
    }
#endif
#ifdef USE_SKIA
#ifdef MOZ_ENABLE_FREETYPE
  case NATIVE_FONT_SKIA_FONT_FACE:
    {
      return new ScaledFontFreetype(static_cast<FontOptions*>(aNativeFont.mFont), aSize);
    }
#endif
#endif
#ifdef USE_CAIRO
  case NATIVE_FONT_CAIRO_FONT_FACE:
    {
      ScaledFontBase* fontBase = new ScaledFontBase(aSize);
      fontBase->SetCairoScaledFont(static_cast<cairo_scaled_font_t*>(aNativeFont.mFont));
      return fontBase;
    }
#endif
  default:
    gfxWarning() << "Invalid native font type specified.";
    return nullptr;
  }
}

TemporaryRef<ScaledFont>
Factory::CreateScaledFontWithCairo(const NativeFont& aNativeFont, Float aSize, cairo_scaled_font_t* aScaledFont)
{
#ifdef USE_CAIRO
  // In theory, we could pull the NativeFont out of the cairo_scaled_font_t*,
  // but that would require a lot of code that would be otherwise repeated in
  // various backends.
  // Therefore, we just reuse CreateScaledFontForNativeFont's implementation.
  RefPtr<ScaledFont> font = CreateScaledFontForNativeFont(aNativeFont, aSize);
  static_cast<ScaledFontBase*>(font.get())->SetCairoScaledFont(aScaledFont);
  return font;
#else
  return nullptr;
#endif
}

#ifdef WIN32
TemporaryRef<DrawTarget>
Factory::CreateDrawTargetForD3D10Texture(ID3D10Texture2D *aTexture, SurfaceFormat aFormat)
{
  RefPtr<DrawTargetD2D> newTarget;

  newTarget = new DrawTargetD2D();
  if (newTarget->Init(aTexture, aFormat)) {
    return newTarget;
  }

  gfxWarning() << "Failed to create draw target for D3D10 texture.";

  // Failed
  return nullptr;
}

TemporaryRef<DrawTarget>
Factory::CreateDualDrawTargetForD3D10Textures(ID3D10Texture2D *aTextureA,
                                              ID3D10Texture2D *aTextureB,
                                              SurfaceFormat aFormat)
{
  RefPtr<DrawTargetD2D> newTargetA;
  RefPtr<DrawTargetD2D> newTargetB;

  newTargetA = new DrawTargetD2D();
  if (!newTargetA->Init(aTextureA, aFormat)) {
    gfxWarning() << "Failed to create draw target for D3D10 texture.";
    return nullptr;
  }

  newTargetB = new DrawTargetD2D();
  if (!newTargetB->Init(aTextureB, aFormat)) {
    gfxWarning() << "Failed to create draw target for D3D10 texture.";
    return nullptr;
  }

  RefPtr<DrawTarget> newTarget =
    new DrawTargetDual(newTargetA, newTargetB);

  return newTarget;
}

void
Factory::SetDirect3D10Device(ID3D10Device1 *aDevice)
{
  mD3D10Device = aDevice;
}

ID3D10Device1*
Factory::GetDirect3D10Device()
{
  return mD3D10Device;
}

TemporaryRef<GlyphRenderingOptions>
Factory::CreateDWriteGlyphRenderingOptions(IDWriteRenderingParams *aParams)
{
  RefPtr<GlyphRenderingOptions> options =
    new GlyphRenderingOptionsDWrite(aParams);

  return options;
}

uint64_t
Factory::GetD2DVRAMUsageDrawTarget()
{
  return DrawTargetD2D::mVRAMUsageDT;
}

uint64_t
Factory::GetD2DVRAMUsageSourceSurface()
{
  return DrawTargetD2D::mVRAMUsageSS;
}

#endif // XP_WIN

TemporaryRef<DrawTarget>
Factory::CreateDrawTargetForCairoSurface(cairo_surface_t* aSurface, const IntSize& aSize)
{
#ifdef USE_CAIRO
  RefPtr<DrawTargetCairo> newTarget = new DrawTargetCairo();
  if (newTarget->Init(aSurface, aSize)) {
    return newTarget;
  }

#endif
  return nullptr;
}

TemporaryRef<DataSourceSurface>
Factory::CreateWrappingDataSourceSurface(uint8_t *aData, int32_t aStride,
                                         const IntSize &aSize,
                                         SurfaceFormat aFormat)
{
  RefPtr<SourceSurfaceRawData> newSurf = new SourceSurfaceRawData();

  if (newSurf->InitWrappingData(aData, aSize, aStride, aFormat, false)) {
    return newSurf;
  }

  return nullptr;
}

}
}