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android13/external/skia/gm/exoticformats.cpp

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/*
* Copyright 2020 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkImage.h"
#include "include/core/SkStream.h"
#include "include/gpu/GrDirectContext.h"
#include "include/gpu/GrRecordingContext.h"
#include "src/core/SkCompressedDataUtils.h"
#include "src/core/SkMipmap.h"
#include "src/gpu/GrImageContextPriv.h"
#include "src/gpu/GrRecordingContextPriv.h"
#include "src/gpu/gl/GrGLDefines.h"
#include "src/image/SkImage_Base.h"
#include "src/image/SkImage_GpuBase.h"
#include "tools/gpu/ProxyUtils.h"
#include "tools/Resources.h"
//-------------------------------------------------------------------------------------------------
struct ImageInfo {
SkISize fDim;
GrMipmapped fMipmapped;
SkImage::CompressionType fCompressionType;
};
/*
* Get an int from a buffer
* This method is unsafe, the caller is responsible for performing a check
*/
static inline uint32_t get_uint(uint8_t* buffer, uint32_t i) {
uint32_t result;
memcpy(&result, &(buffer[i]), 4);
return result;
}
// This KTX loader is barely sufficient to load the specific files this GM requires. Use
// at your own peril.
static sk_sp<SkData> load_ktx(const char* filename, ImageInfo* imageInfo) {
SkFILEStream input(filename);
if (!input.isValid()) {
return nullptr;
}
constexpr int kKTXIdentifierSize = 12;
constexpr int kKTXHeaderSize = kKTXIdentifierSize + 13 * sizeof(uint32_t);
uint8_t header[kKTXHeaderSize];
if (input.read(header, kKTXHeaderSize) != kKTXHeaderSize) {
return nullptr;
}
static const uint8_t kExpectedIdentifier[kKTXIdentifierSize] = {
0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A
};
if (0 != memcmp(header, kExpectedIdentifier, kKTXIdentifierSize)) {
return nullptr;
}
uint32_t endianness = get_uint(header, 12);
if (endianness != 0x04030201) {
// TODO: need to swap rest of header and, if glTypeSize is > 1, all
// the texture data.
return nullptr;
}
uint32_t glType = get_uint(header, 16);
SkDEBUGCODE(uint32_t glTypeSize = get_uint(header, 20);)
uint32_t glFormat = get_uint(header, 24);
uint32_t glInternalFormat = get_uint(header, 28);
//uint32_t glBaseInternalFormat = get_uint(header, 32);
uint32_t pixelWidth = get_uint(header, 36);
uint32_t pixelHeight = get_uint(header, 40);
uint32_t pixelDepth = get_uint(header, 44);
//uint32_t numberOfArrayElements = get_uint(header, 48);
uint32_t numberOfFaces = get_uint(header, 52);
int numberOfMipmapLevels = get_uint(header, 56);
uint32_t bytesOfKeyValueData = get_uint(header, 60);
if (glType != 0 || glFormat != 0) { // only care about compressed data for now
return nullptr;
}
SkASSERT(glTypeSize == 1); // required for compressed data
// We only handle these four formats right now
switch (glInternalFormat) {
case GR_GL_COMPRESSED_ETC1_RGB8:
case GR_GL_COMPRESSED_RGB8_ETC2:
imageInfo->fCompressionType = SkImage::CompressionType::kETC2_RGB8_UNORM;
break;
case GR_GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
imageInfo->fCompressionType = SkImage::CompressionType::kBC1_RGB8_UNORM;
break;
case GR_GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
imageInfo->fCompressionType = SkImage::CompressionType::kBC1_RGBA8_UNORM;
break;
default:
return nullptr;
}
imageInfo->fDim.fWidth = pixelWidth;
imageInfo->fDim.fHeight = pixelHeight;
if (pixelDepth != 0) {
return nullptr; // pixel depth is always zero for 2D textures
}
if (numberOfFaces != 1) {
return nullptr; // we don't support cube maps right now
}
if (numberOfMipmapLevels == 1) {
imageInfo->fMipmapped = GrMipmapped::kNo;
} else {
int numRequiredMipLevels = SkMipmap::ComputeLevelCount(pixelWidth, pixelHeight)+1;
if (numberOfMipmapLevels != numRequiredMipLevels) {
return nullptr;
}
imageInfo->fMipmapped = GrMipmapped::kYes;
}
if (bytesOfKeyValueData != 0) {
return nullptr;
}
SkTArray<size_t> individualMipOffsets(numberOfMipmapLevels);
size_t dataSize = SkCompressedDataSize(imageInfo->fCompressionType,
{ (int) pixelWidth, (int) pixelHeight },
&individualMipOffsets,
imageInfo->fMipmapped == GrMipmapped::kYes);
SkASSERT(individualMipOffsets.size() == (size_t) numberOfMipmapLevels);
sk_sp<SkData> data = SkData::MakeUninitialized(dataSize);
uint8_t* dest = (uint8_t*) data->writable_data();
size_t offset = 0;
for (int i = 0; i < numberOfMipmapLevels; ++i) {
uint32_t imageSize;
if (input.read(&imageSize, 4) != 4) {
return nullptr;
}
SkASSERT(offset + imageSize <= dataSize);
SkASSERT(offset == individualMipOffsets[i]);
if (input.read(&dest[offset], imageSize) != imageSize) {
return nullptr;
}
offset += imageSize;
}
return data;
}
//-------------------------------------------------------------------------------------------------
typedef uint32_t DWORD;
// Values for the DDS_PIXELFORMAT 'dwFlags' field
constexpr unsigned int kDDPF_FOURCC = 0x4;
struct DDS_PIXELFORMAT {
DWORD dwSize;
DWORD dwFlags;
DWORD dwFourCC;
DWORD dwRGBBitCount;
DWORD dwRBitMask;
DWORD dwGBitMask;
DWORD dwBBitMask;
DWORD dwABitMask;
};
// Values for the DDS_HEADER 'dwFlags' field
constexpr unsigned int kDDSD_CAPS = 0x1; // required
constexpr unsigned int kDDSD_HEIGHT = 0x2; // required
constexpr unsigned int kDDSD_WIDTH = 0x4; // required
constexpr unsigned int kDDSD_PITCH = 0x8;
constexpr unsigned int kDDSD_PIXELFORMAT = 0x001000; // required
constexpr unsigned int kDDSD_MIPMAPCOUNT = 0x020000;
constexpr unsigned int kDDSD_LINEARSIZE = 0x080000;
constexpr unsigned int kDDSD_DEPTH = 0x800000;
constexpr unsigned int kDDSD_REQUIRED = kDDSD_CAPS | kDDSD_HEIGHT | kDDSD_WIDTH | kDDSD_PIXELFORMAT;
typedef struct {
DWORD dwSize;
DWORD dwFlags;
DWORD dwHeight;
DWORD dwWidth;
DWORD dwPitchOrLinearSize;
DWORD dwDepth;
DWORD dwMipMapCount;
DWORD dwReserved1[11];
DDS_PIXELFORMAT ddspf;
DWORD dwCaps;
DWORD dwCaps2;
DWORD dwCaps3;
DWORD dwCaps4;
DWORD dwReserved2;
} DDS_HEADER;
// This DDS loader is barely sufficient to load the specific files this GM requires. Use
// at your own peril.
static sk_sp<SkData> load_dds(const char* filename, ImageInfo* imageInfo) {
SkFILEStream input(filename);
if (!input.isValid()) {
return nullptr;
}
constexpr uint32_t kMagic = 0x20534444;
uint32_t magic;
if (input.read(&magic, 4) != 4) {
return nullptr;
}
if (magic != kMagic) {
return nullptr;
}
constexpr size_t kDDSHeaderSize = sizeof(DDS_HEADER);
static_assert(kDDSHeaderSize == 124);
constexpr size_t kDDSPixelFormatSize = sizeof(DDS_PIXELFORMAT);
static_assert(kDDSPixelFormatSize == 32);
DDS_HEADER header;
if (input.read(&header, kDDSHeaderSize) != kDDSHeaderSize) {
return nullptr;
}
if (header.dwSize != kDDSHeaderSize ||
header.ddspf.dwSize != kDDSPixelFormatSize) {
return nullptr;
}
if ((header.dwFlags & kDDSD_REQUIRED) != kDDSD_REQUIRED) {
return nullptr;
}
if (header.dwFlags & (kDDSD_PITCH | kDDSD_LINEARSIZE | kDDSD_DEPTH)) {
// TODO: support these features
}
imageInfo->fDim.fWidth = header.dwWidth;
imageInfo->fDim.fHeight = header.dwHeight;
int numberOfMipmapLevels = 1;
if (header.dwFlags & kDDSD_MIPMAPCOUNT) {
if (header.dwMipMapCount == 1) {
imageInfo->fMipmapped = GrMipmapped::kNo;
} else {
int numRequiredLevels = SkMipmap::ComputeLevelCount(header.dwWidth, header.dwHeight)+1;
if (header.dwMipMapCount != (unsigned) numRequiredLevels) {
return nullptr;
}
imageInfo->fMipmapped = GrMipmapped::kYes;
numberOfMipmapLevels = numRequiredLevels;
}
} else {
imageInfo->fMipmapped = GrMipmapped::kNo;
}
if (!(header.ddspf.dwFlags & kDDPF_FOURCC)) {
return nullptr;
}
// We only handle these one format right now
switch (header.ddspf.dwFourCC) {
case 0x31545844: // DXT1
imageInfo->fCompressionType = SkImage::CompressionType::kBC1_RGB8_UNORM;
break;
default:
return nullptr;
}
SkTArray<size_t> individualMipOffsets(numberOfMipmapLevels);
size_t dataSize = SkCompressedDataSize(imageInfo->fCompressionType,
{ (int) header.dwWidth, (int) header.dwHeight },
&individualMipOffsets,
imageInfo->fMipmapped == GrMipmapped::kYes);
SkASSERT(individualMipOffsets.size() == (size_t) numberOfMipmapLevels);
sk_sp<SkData> data = SkData::MakeUninitialized(dataSize);
uint8_t* dest = (uint8_t*) data->writable_data();
size_t amountRead = input.read(dest, dataSize);
if (amountRead != dataSize) {
return nullptr;
}
return data;
}
//-------------------------------------------------------------------------------------------------
static sk_sp<SkImage> data_to_img(GrDirectContext *direct, sk_sp<SkData> data,
const ImageInfo& info) {
if (direct) {
return SkImage::MakeTextureFromCompressed(direct, std::move(data),
info.fDim.fWidth,
info.fDim.fHeight,
info.fCompressionType,
info.fMipmapped);
} else {
return SkImage::MakeRasterFromCompressed(std::move(data),
info.fDim.fWidth,
info.fDim.fHeight,
info.fCompressionType);
}
}
namespace skiagm {
// This GM exercises our handling of some of the more exotic formats using externally
// generated content. Right now it only tests ETC1 and BC1.
class ExoticFormatsGM : public GM {
public:
ExoticFormatsGM() {
this->setBGColor(SK_ColorBLACK);
}
protected:
SkString onShortName() override {
return SkString("exoticformats");
}
SkISize onISize() override {
return SkISize::Make(2*kImgWidthHeight + 3 * kPad, kImgWidthHeight + 2 * kPad);
}
bool loadImages(GrDirectContext *direct) {
SkASSERT(!fETC1Image && !fBC1Image);
{
ImageInfo info;
sk_sp<SkData> data = load_ktx(GetResourcePath("images/flower-etc1.ktx").c_str(), &info);
if (data) {
SkASSERT(info.fDim.equals(kImgWidthHeight, kImgWidthHeight));
SkASSERT(info.fMipmapped == GrMipmapped::kNo);
SkASSERT(info.fCompressionType == SkImage::CompressionType::kETC2_RGB8_UNORM);
fETC1Image = data_to_img(direct, std::move(data), info);
} else {
SkDebugf("failed to load flower-etc1.ktx\n");
return false;
}
}
{
ImageInfo info;
sk_sp<SkData> data = load_dds(GetResourcePath("images/flower-bc1.dds").c_str(), &info);
if (data) {
SkASSERT(info.fDim.equals(kImgWidthHeight, kImgWidthHeight));
SkASSERT(info.fMipmapped == GrMipmapped::kNo);
SkASSERT(info.fCompressionType == SkImage::CompressionType::kBC1_RGB8_UNORM);
fBC1Image = data_to_img(direct, std::move(data), info);
} else {
SkDebugf("failed to load flower-bc1.dds\n");
return false;
}
}
return true;
}
void drawImage(SkCanvas* canvas, SkImage* image, int x, int y) {
if (!image) {
return;
}
bool isCompressed = false;
if (image->isTextureBacked()) {
const GrCaps* caps = as_IB(image)->context()->priv().caps();
GrTextureProxy* proxy = sk_gpu_test::GetTextureImageProxy(image,
canvas->recordingContext());
isCompressed = caps->isFormatCompressed(proxy->backendFormat());
}
canvas->drawImage(image, x, y);
if (!isCompressed) {
// Make it obvious which drawImages used decompressed images
SkRect r = SkRect::MakeXYWH(x, y, kImgWidthHeight, kImgWidthHeight);
SkPaint paint;
paint.setColor(SK_ColorRED);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(2.0f);
canvas->drawRect(r, paint);
}
}
DrawResult onGpuSetup(GrDirectContext* dContext, SkString* errorMsg) override {
if (dContext && dContext->abandoned()) {
// This isn't a GpuGM so a null 'context' is okay but an abandoned context
// if forbidden.
return DrawResult::kSkip;
}
if (!this->loadImages(dContext)) {
*errorMsg = "Failed to create images.";
return DrawResult::kFail;
}
return DrawResult::kOk;
}
void onGpuTeardown() override {
fETC1Image = nullptr;
fBC1Image = nullptr;
}
void onDraw(SkCanvas* canvas) override {
SkASSERT(fETC1Image && fBC1Image);
this->drawImage(canvas, fETC1Image.get(), kPad, kPad);
this->drawImage(canvas, fBC1Image.get(), kImgWidthHeight + 2 * kPad, kPad);
}
private:
static const int kImgWidthHeight = 128;
static const int kPad = 4;
sk_sp<SkImage> fETC1Image;
sk_sp<SkImage> fBC1Image;
using INHERITED = GM;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ExoticFormatsGM;)
} // namespace skiagm
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