/src/xpdf-4.06/splash/SplashBitmap.cc

Source
//========================================================================
//
// SplashBitmap.cc
//
// Copyright 2003-2013 Glyph & Cog, LLC
//
//========================================================================

#include <aconf.h>

#include <stdio.h>
#include <limits.h>
#include "gmem.h"
#include "gmempp.h"
#include "gfile.h"
#include "Trace.h"
#include "SplashErrorCodes.h"
#include "SplashBitmap.h"

//------------------------------------------------------------------------
// SplashBitmapMemCache
//------------------------------------------------------------------------

#define splashBitmapMemCacheThreshold 4000000

SplashBitmapMemCache::SplashBitmapMemCache() {
  for (int i = 0; i < splashBitmapMemCacheSize; ++i) {
    cache[i].data = NULL;
    cache[i].height = 0;
    cache[i].rowSize = 0;
  }
}

SplashBitmapMemCache::~SplashBitmapMemCache() {
  for (int i = 0; i < splashBitmapMemCacheSize; ++i) {
    if (cache[i].data) {
      gfree(cache[i].data);
      cache[i].data = NULL;
      cache[i].height = 0;
      cache[i].rowSize = 0;
    }
  }
}

void *SplashBitmapMemCache::alloc(int height, SplashBitmapRowSize rowSize) {
  // if the block is small, just allocate it
  if (rowSize < splashBitmapMemCacheThreshold / height) {
    return gmallocn64(height, rowSize);
  }

  // if a match is found in the cache, return it
  for (int i = splashBitmapMemCacheSize - 1; i >= 0; --i) {
    if (cache[i].data &&
  cache[i].height == height &&
  cache[i].rowSize == rowSize) {
      void *data = cache[i].data;
      for (int j = i; j < splashBitmapMemCacheSize - 1; ++j) {
  cache[j] = cache[j + 1];
      }
      cache[splashBitmapMemCacheSize - 1].data = NULL;
      cache[splashBitmapMemCacheSize - 1].height = 0;
      cache[splashBitmapMemCacheSize - 1].rowSize = 0;
      return data;
    }
  }

  // if no match was found, clear the cache and allcoate the block
  for (int i = 0; i < splashBitmapMemCacheSize; ++i) {
    if (cache[i].data) {
      gfree(cache[i].data);
      cache[i].data = NULL;
      cache[i].height = 0;
      cache[i].rowSize = 0;
    }
  }
  return gmallocn64(height, rowSize);
}

void SplashBitmapMemCache::free(void *data, int height,
        SplashBitmapRowSize rowSize) {
  if (rowSize < splashBitmapMemCacheThreshold / height) {
    gfree(data);
    return;
  }
  if (cache[0].data) {
    gfree(cache[0].data);
  }
  for (int i = 0; i < splashBitmapMemCacheSize - 1; ++i) {
    cache[i] = cache[i + 1];
  }
  cache[splashBitmapMemCacheSize - 1].data = data;
  cache[splashBitmapMemCacheSize - 1].height = height;
  cache[splashBitmapMemCacheSize - 1].rowSize = rowSize;
}

//------------------------------------------------------------------------
// SplashBitmap
//------------------------------------------------------------------------

SplashBitmap::SplashBitmap(int widthA, int heightA, int rowPad,
         SplashColorMode modeA, GBool alphaA,
         GBool topDown, SplashBitmapMemCache *cacheA) {
  // NB: this code checks that rowSize fits in a signed 32-bit
  // integer, because some code (outside this class) makes that
  // assumption
  width = widthA;
  height = heightA;
  mode = modeA;
  rowSize = 0; // make gcc happy
  switch (mode) {
  case splashModeMono1:
    if (width <= 0) {
      gMemError("invalid bitmap width");
    }
    rowSize = (width + 7) >> 3;
    break;
  case splashModeMono8:
    if (width <= 0) {
      gMemError("invalid bitmap width");
    }
    rowSize = width;
    break;
  case splashModeRGB8:
  case splashModeBGR8:
    if (width <= 0 || width > INT_MAX / 3) {
      gMemError("invalid bitmap width");
    }
    rowSize = (SplashBitmapRowSize)width * 3;
    break;
#if SPLASH_CMYK
  case splashModeCMYK8:
    if (width <= 0 || width > INT_MAX / 4) {
      gMemError("invalid bitmap width");
    }
    rowSize = (SplashBitmapRowSize)width * 4;
    break;
#endif
  }
  rowSize += rowPad - 1;
  rowSize -= rowSize % rowPad;

  traceAlloc(this, "alloc bitmap: %d x %d x %d %s -> %lld bytes",
       width, height, splashColorModeNComps[mode],
       alphaA ? "with alpha" : "without alpha",
       height * rowSize + (alphaA ? height * width : 0));

  cache = cacheA;
  if (cache) {
    data = (SplashColorPtr)cache->alloc(height, rowSize);
  } else {
    data = (SplashColorPtr)gmallocn64(height, rowSize);
  }
  if (!topDown) {
    data += (height - 1) * rowSize;
    rowSize = -rowSize;
  }
  if (alphaA) {
    alphaRowSize = width;
    if (cache) {
      alpha = (Guchar *)cache->alloc(height, alphaRowSize);
    } else {
      alpha = (Guchar *)gmallocn64(height, alphaRowSize);
    }
  } else {
    alphaRowSize = 0;
    alpha = NULL;
  }
}

SplashBitmap::~SplashBitmap() {
  traceFree(this, "free bitmap");
  if (data && rowSize < 0) {
    rowSize = -rowSize;
    data -= (height - 1) * rowSize;
  }
  if (cache) {
    cache->free(data, height, rowSize);
    if (alpha) {
      cache->free(alpha, height, alphaRowSize);
    }
  } else {
    gfree(data);
    gfree(alpha);
  }
}

SplashError SplashBitmap::writePNMFile(char *fileName) {
  FILE *f;
  SplashError err;

  if (!(f = openFile(fileName, "wb"))) {
    return splashErrOpenFile;
  }
  err = writePNMFile(f);
  fclose(f);
  return err;
}

SplashError SplashBitmap::writePNMFile(FILE *f) {
  SplashColorPtr row, p;
  int x, y;

  switch (mode) {

  case splashModeMono1:
    fprintf(f, "P4\n%d %d\n", width, height);
    row = data;
    for (y = 0; y < height; ++y) {
      p = row;
      for (x = 0; x < width; x += 8) {
  fputc(*p ^ 0xff, f);
  ++p;
      }
      row += rowSize;
    }
    break;

  case splashModeMono8:
    fprintf(f, "P5\n%d %d\n255\n", width, height);
    row = data;
    for (y = 0; y < height; ++y) {
      fwrite(row, 1, width, f);
      row += rowSize;
    }
    break;

  case splashModeRGB8:
    fprintf(f, "P6\n%d %d\n255\n", width, height);
    row = data;
    for (y = 0; y < height; ++y) {
      fwrite(row, 1, 3 * width, f);
      row += rowSize;
    }
    break;

  case splashModeBGR8:
    fprintf(f, "P6\n%d %d\n255\n", width, height);
    row = data;
    for (y = 0; y < height; ++y) {
      p = row;
      for (x = 0; x < width; ++x) {
  fputc(splashBGR8R(p), f);
  fputc(splashBGR8G(p), f);
  fputc(splashBGR8B(p), f);
  p += 3;
      }
      row += rowSize;
    }
    break;

#if SPLASH_CMYK
  case splashModeCMYK8:
    fprintf(f, "P7\n");
    fprintf(f, "WIDTH %d\n", width);
    fprintf(f, "HEIGHT %d\n", height);
    fprintf(f, "DEPTH 4\n");
    fprintf(f, "MAXVAL 255\n");
    fprintf(f, "TUPLTYPE CMYK\n");
    fprintf(f, "ENDHDR\n");
    row = data;
    for (y = 0; y < height; ++y) {
      fwrite(row, 1, 4 * width, f);
      row += rowSize;
    }
    break;
#endif

  }

  return splashOk;
}

SplashError SplashBitmap::writeAlphaPGMFile(char *fileName) {
  FILE *f;

  if (!alpha) {
    return splashErrModeMismatch;
  }
  if (!(f = openFile(fileName, "wb"))) {
    return splashErrOpenFile;
  }
  fprintf(f, "P5\n%d %d\n255\n", width, height);
  fwrite(alpha, 1, width * height, f);
  fclose(f);
  return splashOk;
}


void SplashBitmap::getPixel(int x, int y, SplashColorPtr pixel) {
  SplashColorPtr p;

  if (y < 0 || y >= height || x < 0 || x >= width) {
    return;
  }
  switch (mode) {
  case splashModeMono1:
    p = &data[y * rowSize + (x >> 3)];
    pixel[0] = (p[0] & (0x80 >> (x & 7))) ? 0xff : 0x00;
    break;
  case splashModeMono8:
    p = &data[y * rowSize + x];
    pixel[0] = p[0];
    break;
  case splashModeRGB8:
    p = &data[y * rowSize + 3 * x];
    pixel[0] = p[0];
    pixel[1] = p[1];
    pixel[2] = p[2];
    break;
  case splashModeBGR8:
    p = &data[y * rowSize + 3 * x];
    pixel[0] = p[2];
    pixel[1] = p[1];
    pixel[2] = p[0];
    break;
#if SPLASH_CMYK
  case splashModeCMYK8:
    p = &data[y * rowSize + 4 * x];
    pixel[0] = p[0];
    pixel[1] = p[1];
    pixel[2] = p[2];
    pixel[3] = p[3];
    break;
#endif
  }
}

Guchar SplashBitmap::getAlpha(int x, int y) {
  return alpha[y * (size_t)width + x];
}

SplashColorPtr SplashBitmap::takeData() {
  SplashColorPtr data2;

  data2 = data;
  data = NULL;
  return data2;
}

void SplashBitmap::doNotCache() {
  cache = NULL;
}


//------------------------------------------------------------------------
// SplashAlphaBitmap
//------------------------------------------------------------------------

SplashAlphaBitmap::SplashAlphaBitmap(int widthA, int heightA,
             SplashBitmapMemCache *cacheA) {
  width = widthA;
  height = heightA;
  alphaRowSize = width;

  traceAlloc(this, "alloc alpha bitmap: %d x %d -> %lld bytes",
       width, height, height * alphaRowSize);

  cache = cacheA;
  if (cache) {
    alpha = (Guchar *)cache->alloc(height, alphaRowSize);
  } else {
    alpha = (Guchar *)gmallocn64(height, alphaRowSize);
  }
}

SplashAlphaBitmap::~SplashAlphaBitmap() {
  traceFree(this, "free alpha bitmap");
  if (cache) {
    cache->free(alpha, height, alphaRowSize);
  } else {
    gfree(alpha);
  }
}

Coverage Report

Created: 2026-06-22 07:14

Line	Count	Source
1		//========================================================================
2		//
3		// SplashBitmap.cc
4		//
5		// Copyright 2003-2013 Glyph & Cog, LLC
6		//
7		//========================================================================
8
9		#include <aconf.h>
10
11		#include <stdio.h>
12		#include <limits.h>
13		#include "gmem.h"
14		#include "gmempp.h"
15		#include "gfile.h"
16		#include "Trace.h"
17		#include "SplashErrorCodes.h"
18		#include "SplashBitmap.h"
19
20		//------------------------------------------------------------------------
21		// SplashBitmapMemCache
22		//------------------------------------------------------------------------
23
24	65.9k	#define splashBitmapMemCacheThreshold 4000000
25
26	10.2k	SplashBitmapMemCache::SplashBitmapMemCache() {
27	51.4k	for (int i = 0; i < splashBitmapMemCacheSize; ++i) {
28	41.1k	cache[i].data = NULL;
29	41.1k	cache[i].height = 0;
30	41.1k	cache[i].rowSize = 0;
31	41.1k	}
32	10.2k	}
33
34	10.2k	SplashBitmapMemCache::~SplashBitmapMemCache() {
35	51.3k	for (int i = 0; i < splashBitmapMemCacheSize; ++i) {
36	41.0k	if (cache[i].data) {
37	49	gfree(cache[i].data);
38	49	cache[i].data = NULL;
39	49	cache[i].height = 0;
40	49	cache[i].rowSize = 0;
41	49	}
42	41.0k	}
43	10.2k	}
44
45	33.0k	void *SplashBitmapMemCache::alloc(int height, SplashBitmapRowSize rowSize) {
46		// if the block is small, just allocate it
47	33.0k	if (rowSize < splashBitmapMemCacheThreshold / height) {
48	32.8k	return gmallocn64(height, rowSize);
49	32.8k	}
50
51		// if a match is found in the cache, return it
52	452	for (int i = splashBitmapMemCacheSize - 1; i >= 0; --i) {
53	384	if (cache[i].data &&
54	98	cache[i].height == height &&
55	90	cache[i].rowSize == rowSize) {
56	64	void *data = cache[i].data;
57	112	for (int j = i; j < splashBitmapMemCacheSize - 1; ++j) {
58	48	cache[j] = cache[j + 1];
59	48	}
60	64	cache[splashBitmapMemCacheSize - 1].data = NULL;
61	64	cache[splashBitmapMemCacheSize - 1].height = 0;
62	64	cache[splashBitmapMemCacheSize - 1].rowSize = 0;
63	64	return data;
64	64	}
65	384	}
66
67		// if no match was found, clear the cache and allcoate the block
68	340	for (int i = 0; i < splashBitmapMemCacheSize; ++i) {
69	272	if (cache[i].data) {
70	10	gfree(cache[i].data);
71	10	cache[i].data = NULL;
72	10	cache[i].height = 0;
73	10	cache[i].rowSize = 0;
74	10	}
75	272	}
76	68	return gmallocn64(height, rowSize);
77	132	}
78
79		void SplashBitmapMemCache::free(void *data, int height,
80	32.9k	SplashBitmapRowSize rowSize) {
81	32.9k	if (rowSize < splashBitmapMemCacheThreshold / height) {
82	32.8k	gfree(data);
83	32.8k	return;
84	32.8k	}
85	123	if (cache[0].data) {
86	0	gfree(cache[0].data);
87	0	}
88	492	for (int i = 0; i < splashBitmapMemCacheSize - 1; ++i) {
89	369	cache[i] = cache[i + 1];
90	369	}
91	123	cache[splashBitmapMemCacheSize - 1].data = data;
92	123	cache[splashBitmapMemCacheSize - 1].height = height;
93	123	cache[splashBitmapMemCacheSize - 1].rowSize = rowSize;
94	123	}
95
96		//------------------------------------------------------------------------
97		// SplashBitmap
98		//------------------------------------------------------------------------
99
100		SplashBitmap::SplashBitmap(int widthA, int heightA, int rowPad,
101		SplashColorMode modeA, GBool alphaA,
102	18.1k	GBool topDown, SplashBitmapMemCache *cacheA) {
103		// NB: this code checks that rowSize fits in a signed 32-bit
104		// integer, because some code (outside this class) makes that
105		// assumption
106	18.1k	width = widthA;
107	18.1k	height = heightA;
108	18.1k	mode = modeA;
109	18.1k	rowSize = 0; // make gcc happy
110	18.1k	switch (mode) {
111	65	case splashModeMono1:
112	65	if (width <= 0) {
113	0	gMemError("invalid bitmap width");
114	0	}
115	65	rowSize = (width + 7) >> 3;
116	65	break;
117	3.91k	case splashModeMono8:
118	3.91k	if (width <= 0) {
119	0	gMemError("invalid bitmap width");
120	0	}
121	3.91k	rowSize = width;
122	3.91k	break;
123	13.9k	case splashModeRGB8:
124	13.9k	case splashModeBGR8:
125	13.9k	if (width <= 0 \|\| width > INT_MAX / 3) {
126	7	gMemError("invalid bitmap width");
127	7	}
128	13.9k	rowSize = (SplashBitmapRowSize)width * 3;
129	13.9k	break;
130	0	#if SPLASH_CMYK
131	163	case splashModeCMYK8:
132	163	if (width <= 0 \|\| width > INT_MAX / 4) {
133	0	gMemError("invalid bitmap width");
134	0	}
135	163	rowSize = (SplashBitmapRowSize)width * 4;
136	163	break;
137	18.1k	#endif
138	18.1k	}
139	18.0k	rowSize += rowPad - 1;
140	18.0k	rowSize -= rowSize % rowPad;
141
142	18.0k	traceAlloc(this, "alloc bitmap: %d x %d x %d %s -> %lld bytes",
143	18.0k	width, height, splashColorModeNComps[mode],
144	18.0k	alphaA ? "with alpha" : "without alpha",
145	18.0k	height * rowSize + (alphaA ? height * width : 0));
146
147	18.0k	cache = cacheA;
148	18.0k	if (cache) {
149	18.0k	data = (SplashColorPtr)cache->alloc(height, rowSize);
150	18.0k	} else {
151	0	data = (SplashColorPtr)gmallocn64(height, rowSize);
152	0	}
153	18.0k	if (!topDown) {
154	0	data += (height - 1) * rowSize;
155	0	rowSize = -rowSize;
156	0	}
157	18.0k	if (alphaA) {
158	14.8k	alphaRowSize = width;
159	14.8k	if (cache) {
160	14.8k	alpha = (Guchar *)cache->alloc(height, alphaRowSize);
161	14.8k	} else {
162	0	alpha = (Guchar *)gmallocn64(height, alphaRowSize);
163	0	}
164	14.8k	} else {
165	3.22k	alphaRowSize = 0;
166	3.22k	alpha = NULL;
167	3.22k	}
168	18.0k	}
169
170	18.0k	SplashBitmap::~SplashBitmap() {
171	18.0k	traceFree(this, "free bitmap");
172	18.0k	if (data && rowSize < 0) {
173	0	rowSize = -rowSize;
174	0	data -= (height - 1) * rowSize;
175	0	}
176	18.0k	if (cache) {
177	18.0k	cache->free(data, height, rowSize);
178	18.0k	if (alpha) {
179	14.8k	cache->free(alpha, height, alphaRowSize);
180	14.8k	}
181	18.0k	} else {
182	0	gfree(data);
183	0	gfree(alpha);
184	0	}
185	18.0k	}
186
187	0	SplashError SplashBitmap::writePNMFile(char *fileName) {
188	0	FILE *f;
189	0	SplashError err;
190
191	0	if (!(f = openFile(fileName, "wb"))) {
192	0	return splashErrOpenFile;
193	0	}
194	0	err = writePNMFile(f);
195	0	fclose(f);
196	0	return err;
197	0	}
198
199	0	SplashError SplashBitmap::writePNMFile(FILE *f) {
200	0	SplashColorPtr row, p;
201	0	int x, y;
202
203	0	switch (mode) {
204
205	0	case splashModeMono1:
206	0	fprintf(f, "P4\n%d %d\n", width, height);
207	0	row = data;
208	0	for (y = 0; y < height; ++y) {
209	0	p = row;
210	0	for (x = 0; x < width; x += 8) {
211	0	fputc(*p ^ 0xff, f);
212	0	++p;
213	0	}
214	0	row += rowSize;
215	0	}
216	0	break;
217
218	0	case splashModeMono8:
219	0	fprintf(f, "P5\n%d %d\n255\n", width, height);
220	0	row = data;
221	0	for (y = 0; y < height; ++y) {
222	0	fwrite(row, 1, width, f);
223	0	row += rowSize;
224	0	}
225	0	break;
226
227	0	case splashModeRGB8:
228	0	fprintf(f, "P6\n%d %d\n255\n", width, height);
229	0	row = data;
230	0	for (y = 0; y < height; ++y) {
231	0	fwrite(row, 1, 3 * width, f);
232	0	row += rowSize;
233	0	}
234	0	break;
235
236	0	case splashModeBGR8:
237	0	fprintf(f, "P6\n%d %d\n255\n", width, height);
238	0	row = data;
239	0	for (y = 0; y < height; ++y) {
240	0	p = row;
241	0	for (x = 0; x < width; ++x) {
242	0	fputc(splashBGR8R(p), f);
243	0	fputc(splashBGR8G(p), f);
244	0	fputc(splashBGR8B(p), f);
245	0	p += 3;
246	0	}
247	0	row += rowSize;
248	0	}
249	0	break;
250
251	0	#if SPLASH_CMYK
252	0	case splashModeCMYK8:
253	0	fprintf(f, "P7\n");
254	0	fprintf(f, "WIDTH %d\n", width);
255	0	fprintf(f, "HEIGHT %d\n", height);
256	0	fprintf(f, "DEPTH 4\n");
257	0	fprintf(f, "MAXVAL 255\n");
258	0	fprintf(f, "TUPLTYPE CMYK\n");
259	0	fprintf(f, "ENDHDR\n");
260	0	row = data;
261	0	for (y = 0; y < height; ++y) {
262	0	fwrite(row, 1, 4 * width, f);
263	0	row += rowSize;
264	0	}
265	0	break;
266	0	#endif
267
268	0	}
269
270	0	return splashOk;
271	0	}
272
273	0	SplashError SplashBitmap::writeAlphaPGMFile(char *fileName) {
274	0	FILE *f;
275
276	0	if (!alpha) {
277	0	return splashErrModeMismatch;
278	0	}
279	0	if (!(f = openFile(fileName, "wb"))) {
280	0	return splashErrOpenFile;
281	0	}
282	0	fprintf(f, "P5\n%d %d\n255\n", width, height);
283	0	fwrite(alpha, 1, width * height, f);
284	0	fclose(f);
285	0	return splashOk;
286	0	}
287
288
289	0	void SplashBitmap::getPixel(int x, int y, SplashColorPtr pixel) {
290	0	SplashColorPtr p;
291
292	0	if (y < 0 \|\| y >= height \|\| x < 0 \|\| x >= width) {
293	0	return;
294	0	}
295	0	switch (mode) {
296	0	case splashModeMono1:
297	0	p = &data[y * rowSize + (x >> 3)];
298	0	pixel[0] = (p[0] & (0x80 >> (x & 7))) ? 0xff : 0x00;
299	0	break;
300	0	case splashModeMono8:
301	0	p = &data[y * rowSize + x];
302	0	pixel[0] = p[0];
303	0	break;
304	0	case splashModeRGB8:
305	0	p = &data[y * rowSize + 3 * x];
306	0	pixel[0] = p[0];
307	0	pixel[1] = p[1];
308	0	pixel[2] = p[2];
309	0	break;
310	0	case splashModeBGR8:
311	0	p = &data[y * rowSize + 3 * x];
312	0	pixel[0] = p[2];
313	0	pixel[1] = p[1];
314	0	pixel[2] = p[0];
315	0	break;
316	0	#if SPLASH_CMYK
317	0	case splashModeCMYK8:
318	0	p = &data[y * rowSize + 4 * x];
319	0	pixel[0] = p[0];
320	0	pixel[1] = p[1];
321	0	pixel[2] = p[2];
322	0	pixel[3] = p[3];
323	0	break;
324	0	#endif
325	0	}
326	0	}
327
328	0	Guchar SplashBitmap::getAlpha(int x, int y) {
329	0	return alpha[y * (size_t)width + x];
330	0	}
331
332	0	SplashColorPtr SplashBitmap::takeData() {
333	0	SplashColorPtr data2;
334
335	0	data2 = data;
336	0	data = NULL;
337	0	return data2;
338	0	}
339
340	0	void SplashBitmap::doNotCache() {
341	0	cache = NULL;
342	0	}
343
344
345		//------------------------------------------------------------------------
346		// SplashAlphaBitmap
347		//------------------------------------------------------------------------
348
349		SplashAlphaBitmap::SplashAlphaBitmap(int widthA, int heightA,
350	41	SplashBitmapMemCache *cacheA) {
351	41	width = widthA;
352	41	height = heightA;
353	41	alphaRowSize = width;
354
355	41	traceAlloc(this, "alloc alpha bitmap: %d x %d -> %lld bytes",
356	41	width, height, height * alphaRowSize);
357
358	41	cache = cacheA;
359	41	if (cache) {
360	41	alpha = (Guchar *)cache->alloc(height, alphaRowSize);
361	41	} else {
362	0	alpha = (Guchar *)gmallocn64(height, alphaRowSize);
363	0	}
364	41	}
365
366	41	SplashAlphaBitmap::~SplashAlphaBitmap() {
367	41	traceFree(this, "free alpha bitmap");
368	41	if (cache) {
369	41	cache->free(alpha, height, alphaRowSize);
370	41	} else {
371	0	gfree(alpha);
372	0	}
373	41	}