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Copy pathFzImgReader.cpp
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291 lines (250 loc) · 8.35 KB
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/* Copyright 2022 the SumatraPDF project authors (see AUTHORS file).
License: Simplified BSD (see COPYING.BSD) */
#pragma warning(disable : 4611) // interaction between '_setjmp' and C++ object destruction is non-portable
extern "C" {
#include <mupdf/fitz.h>
#include <mupdf/pdf.h>
#include "../mupdf/source/fitz/color-imp.h"
#include "../mupdf/source/fitz/image-imp.h"
}
#include "utils/BaseUtil.h"
#include "utils/WinUtil.h"
#include "utils/GdiPlusUtil.h"
#include "utils/FileUtil.h"
#include "FzImgReader.h"
struct MupdfContext {
fz_locks_context fz_locks_ctx{};
CRITICAL_SECTION mutexes[FZ_LOCK_MAX];
fz_context* ctx = nullptr;
};
static void fz_lock_context_cs(void* user, int lock) {
MupdfContext* ctx = (MupdfContext*)user;
EnterCriticalSection(&ctx->mutexes[lock]);
}
static void fz_unlock_context_cs(void* user, int lock) {
MupdfContext* ctx = (MupdfContext*)user;
LeaveCriticalSection(&ctx->mutexes[lock]);
}
fz_context* fz_new_context_windows(size_t maxStore) {
auto c = new MupdfContext();
for (int i = 0; i < FZ_LOCK_MAX; i++) {
InitializeCriticalSection(&c->mutexes[i]);
}
c->fz_locks_ctx.user = c;
c->fz_locks_ctx.lock = fz_lock_context_cs;
c->fz_locks_ctx.unlock = fz_unlock_context_cs;
c->ctx = fz_new_context(nullptr, &c->fz_locks_ctx, maxStore);
return c->ctx;
}
void fz_drop_context_windows(fz_context* ctx) {
auto c = (MupdfContext*)ctx->locks.user;
ReportIf(ctx != c->ctx);
fz_drop_context(ctx);
for (int i = 0; i < FZ_LOCK_MAX; i++) {
DeleteCriticalSection(&c->mutexes[i]);
}
delete c;
}
static Gdiplus::Bitmap* ImageFromJpegData(fz_context* ctx, const u8* data, int len) {
int w = 0, h = 0, xres = 0, yres = 0;
fz_colorspace* cs = nullptr;
fz_stream* stm = nullptr;
uint8_t orient = 0;
fz_var(cs);
fz_var(stm);
fz_var(orient);
fz_try(ctx) {
fz_load_jpeg_info(ctx, data, len, &w, &h, &xres, &yres, &cs, &orient);
stm = fz_open_memory(ctx, data, len);
stm = fz_open_dctd(ctx, stm, -1, 1, 0, nullptr);
}
fz_catch(ctx) {
fz_drop_colorspace(ctx, cs);
cs = nullptr;
fz_report_error(ctx);
}
#ifndef PixelFormat32bppCMYK
#define PixelFormat32bppCMYK (15 | (32 << 8) | PixelFormatGDI)
#endif
Gdiplus::PixelFormat fmt = fz_device_rgb(ctx) == cs ? PixelFormat24bppRGB
: fz_device_gray(ctx) == cs ? PixelFormat24bppRGB
: fz_device_cmyk(ctx) == cs ? PixelFormat32bppCMYK
: PixelFormatUndefined;
if (PixelFormatUndefined == fmt || w <= 0 || h <= 0 || !cs) {
fz_drop_stream(ctx, stm);
fz_drop_colorspace(ctx, cs);
return nullptr;
}
Gdiplus::Bitmap bmp(w, h, fmt);
bmp.SetResolution(xres, yres);
Gdiplus::Rect bmpRect(0, 0, w, h);
Gdiplus::BitmapData bmpData;
Gdiplus::Status ok = bmp.LockBits(&bmpRect, Gdiplus::ImageLockModeWrite, fmt, &bmpData);
if (ok != Gdiplus::Ok) {
fz_drop_stream(ctx, stm);
fz_drop_colorspace(ctx, cs);
return nullptr;
}
fz_var(bmp);
fz_var(bmpRect);
fz_try(ctx) {
for (int y = 0; y < h; y++) {
u8* line = (u8*)bmpData.Scan0 + y * bmpData.Stride;
for (int x = 0; x < w; x++) {
int read = (int)fz_read(ctx, stm, line, cs->n);
if (read != cs->n) {
fz_throw(ctx, FZ_ERROR_GENERIC, "insufficient data for image");
}
if (3 == cs->n) { // RGB -> BGR
std::swap(line[0], line[2]);
line += 3;
} else if (1 == cs->n) { // gray -> BGR
line[1] = line[2] = line[0];
line += 3;
} else if (4 == cs->n) { // CMYK color inversion
for (int k = 0; k < 4; k++) {
line[k] = 255 - line[k];
}
line += 4;
}
}
}
}
fz_always(ctx) {
bmp.UnlockBits(&bmpData);
fz_drop_stream(ctx, stm);
fz_drop_colorspace(ctx, cs);
}
fz_catch(ctx) {
fz_report_error(ctx);
return nullptr;
}
return bmp.Clone(0, 0, w, h, fmt);
}
// had to create a copy of fz_convert_pixmap to ensure we always get the alpha
static fz_pixmap* fz_convert_pixmap2(fz_context* ctx, fz_pixmap* pix, fz_colorspace* ds, fz_colorspace* prf,
fz_default_colorspaces* default_cs, fz_color_params color_params, int keep_alpha) {
fz_pixmap* cvt;
if (!ds && !keep_alpha) {
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot both throw away and keep alpha");
}
cvt = fz_new_pixmap(ctx, ds, pix->w, pix->h, pix->seps, keep_alpha);
cvt->xres = pix->xres;
cvt->yres = pix->yres;
cvt->x = pix->x;
cvt->y = pix->y;
if (pix->flags & FZ_PIXMAP_FLAG_INTERPOLATE) {
cvt->flags |= FZ_PIXMAP_FLAG_INTERPOLATE;
} else {
cvt->flags &= ~FZ_PIXMAP_FLAG_INTERPOLATE;
}
fz_try(ctx) {
fz_convert_pixmap_samples(ctx, pix, cvt, prf, default_cs, color_params, 1);
}
fz_catch(ctx) {
fz_drop_pixmap(ctx, cvt);
fz_rethrow(ctx);
}
return cvt;
}
static Gdiplus::Bitmap* ImageFromJp2Data(fz_context* ctx, const u8* data, int len) {
fz_pixmap* pix = nullptr;
fz_pixmap* pix_argb = nullptr;
fz_var(pix);
fz_var(pix_argb);
fz_try(ctx) {
pix = fz_load_jpx(ctx, data, len, nullptr);
}
fz_catch(ctx) {
fz_report_error(ctx);
pix = nullptr;
}
if (!pix) {
return nullptr;
}
int w = pix->w, h = pix->h;
Gdiplus::PixelFormat pixelFormat = PixelFormat32bppARGB;
Gdiplus::Bitmap bmp(w, h, pixelFormat);
bmp.SetResolution(pix->xres, pix->yres);
Gdiplus::Rect bmpRect(0, 0, w, h);
Gdiplus::BitmapData bmpData;
Gdiplus::Status ok = bmp.LockBits(&bmpRect, Gdiplus::ImageLockModeWrite, pixelFormat, &bmpData);
if (ok != Gdiplus::Ok) {
fz_drop_pixmap(ctx, pix);
return nullptr;
}
fz_var(bmp);
fz_var(bmpRect);
fz_try(ctx) {
fz_colorspace* csdest = fz_device_bgr(ctx);
fz_color_params colparms = fz_default_color_params;
fz_colorspace* prf = nullptr;
int alpha = 1;
// TODO: could be optimized by creating a bitmap with bmpData.Scan0 as data
// Or creating Bitmap after a fact with pix_argb->samples
pix_argb = fz_convert_pixmap2(ctx, pix, csdest, prf, nullptr, colparms, alpha);
u8* bmpPixels = (u8*)bmpData.Scan0;
size_t dataSize = pix_argb->stride * h;
memcpy(bmpPixels, pix_argb->samples, dataSize);
}
fz_always(ctx) {
bmp.UnlockBits(&bmpData);
fz_drop_pixmap(ctx, pix);
fz_drop_pixmap(ctx, pix_argb);
}
fz_catch(ctx) {
fz_report_error(ctx);
return nullptr;
}
return bmp.Clone(0, 0, w, h, pixelFormat);
}
static Gdiplus::Bitmap* FzImageFromData(const ByteSlice& d) {
const u8* data = (const u8*)d.data();
size_t len = d.size();
if (len > INT_MAX || len < 12) {
return nullptr;
}
fz_context* ctx = fz_new_context_windows();
if (!ctx) {
return nullptr;
}
Gdiplus::Bitmap* result = nullptr;
if (str::StartsWith(data, "\xFF\xD8")) {
result = ImageFromJpegData(ctx, data, (int)len);
} else if (memeq(data, "\0\0\0\x0CjP \x0D\x0A\x87\x0A", 12)) {
result = ImageFromJp2Data(ctx, data, (int)len);
}
fz_drop_context_windows(ctx);
return result;
}
Gdiplus::Bitmap* BitmapFromData(const ByteSlice& bmpData) {
auto res = BitmapFromDataWin(bmpData);
if (res) {
return res;
}
return FzImageFromData(bmpData);
}
RenderedBitmap* LoadRenderedBitmap(const char* path) {
if (!path) {
return nullptr;
}
Gdiplus::Bitmap* bmp;
{
ByteSlice data = file::ReadFile(path);
if (!data) {
return nullptr;
}
bmp = BitmapFromData(data);
data.Free();
if (!bmp) {
return nullptr;
}
}
HBITMAP hbmp;
RenderedBitmap* rendered = nullptr;
if (bmp->GetHBITMAP((Gdiplus::ARGB)Gdiplus::Color::White, &hbmp) == Gdiplus::Ok) {
rendered = new RenderedBitmap(hbmp, Size(bmp->GetWidth(), bmp->GetHeight()));
}
delete bmp;
return rendered;
}