[wxWidgets.git] / src / png / pngset.c


/* pngset.c - storage of image information into info struct
 *
 * libpng 1.0.1
 * For conditions of distribution and use, see copyright notice in png.h
 * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
 * Copyright (c) 1996, 1997 Andreas Dilger
 * Copyright (c) 1998, Glenn Randers-Pehrson
 * March 15, 1998
 *
 * The functions here are used during reads to store data from the file
 * into the info struct, and during writes to store application data
 * into the info struct for writing into the file.  This abstracts the
 * info struct and allows us to change the structure in the future.
 */

#define PNG_INTERNAL
#include "png.h"

#if defined(PNG_READ_bKGD_SUPPORTED) || defined(PNG_WRITE_bKGD_SUPPORTED)
void
png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
{
   png_debug1(1, "in %s storage function\n", "bKGD");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   png_memcpy(&(info_ptr->background), background, sizeof(png_color_16));
   info_ptr->valid |= PNG_INFO_bKGD;
}
#endif

#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED)
void
png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
   double white_x, double white_y, double red_x, double red_y,
   double green_x, double green_y, double blue_x, double blue_y)
{
   png_debug1(1, "in %s storage function\n", "cHRM");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->x_white = (float)white_x;
   info_ptr->y_white = (float)white_y;
   info_ptr->x_red   = (float)red_x;
   info_ptr->y_red   = (float)red_y;
   info_ptr->x_green = (float)green_x;
   info_ptr->y_green = (float)green_y;
   info_ptr->x_blue  = (float)blue_x;
   info_ptr->y_blue  = (float)blue_y;
   info_ptr->valid |= PNG_INFO_cHRM;
}
#endif

#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED)
void
png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
{
   png_debug1(1, "in %s storage function\n", "gAMA");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->gamma = (float)file_gamma;
   info_ptr->valid |= PNG_INFO_gAMA;
}
#endif

#if defined(PNG_READ_hIST_SUPPORTED) || defined(PNG_WRITE_hIST_SUPPORTED)
void
png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
{
   png_debug1(1, "in %s storage function\n", "hIST");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->hist = hist;
   info_ptr->valid |= PNG_INFO_hIST;
}
#endif

void
png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
   png_uint_32 width, png_uint_32 height, int bit_depth,
   int color_type, int interlace_type, int compression_type,
   int filter_type)
{
   int rowbytes_per_pixel;
   png_debug1(1, "in %s storage function\n", "IHDR");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->width = width;
   info_ptr->height = height;
   info_ptr->bit_depth = (png_byte)bit_depth;
   info_ptr->color_type =(png_byte) color_type;
   info_ptr->compression_type = (png_byte)compression_type;
   info_ptr->filter_type = (png_byte)filter_type;
   info_ptr->interlace_type = (png_byte)interlace_type;
   if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
      info_ptr->channels = 1;
   else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
      info_ptr->channels = 3;
   else
      info_ptr->channels = 1;
   if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
      info_ptr->channels++;
   info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);

   /* check for overflow */
   rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3;
   info_ptr->rowbytes = info_ptr->width * rowbytes_per_pixel;
   if (( width > (png_uint_32)2147483647L/rowbytes_per_pixel))
   {
      png_warning(png_ptr,
         "Width too large to process image data; rowbytes will overflow.");
      info_ptr->rowbytes = (png_size_t)0;
   }
}

#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
void
png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
   png_uint_32 offset_x, png_uint_32 offset_y, int unit_type)
{
   png_debug1(1, "in %s storage function\n", "oFFs");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->x_offset = offset_x;
   info_ptr->y_offset = offset_y;
   info_ptr->offset_unit_type = (png_byte)unit_type;
   info_ptr->valid |= PNG_INFO_oFFs;
}
#endif

#if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED)
void
png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
   png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
   png_charp units, png_charpp params)
{
   png_uint_32 length;
   int i;

   png_debug1(1, "in %s storage function\n", "pCAL");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   length = png_strlen(purpose) + 1;
   png_debug1(3, "allocating purpose for info (%d bytes)\n", length);
   info_ptr->pcal_purpose = (png_charp)png_malloc(png_ptr, length);
   png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);

   png_debug(3, "storing X0, X1, type, and nparams in info\n");
   info_ptr->pcal_X0 = X0;
   info_ptr->pcal_X1 = X1;
   info_ptr->pcal_type = (png_byte)type;
   info_ptr->pcal_nparams = (png_byte)nparams;

   length = png_strlen(units) + 1;
   png_debug1(3, "allocating units for info (%d bytes)\n", length);
   info_ptr->pcal_units = (png_charp)png_malloc(png_ptr, length);
   png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);

   info_ptr->pcal_params = (png_charpp)png_malloc(png_ptr,
      (png_uint_32)((nparams + 1) * sizeof(png_charp)));
   info_ptr->pcal_params[nparams] = NULL;

   for (i = 0; i < nparams; i++)
   {
      length = png_strlen(params[i]) + 1;
      png_debug2(3, "allocating parameter %d for info (%d bytes)\n", i, length);
      info_ptr->pcal_params[i] = (png_charp)png_malloc(png_ptr, length);
      png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
   }

   info_ptr->valid |= PNG_INFO_pCAL;
}
#endif

#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
void
png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
   png_uint_32 res_x, png_uint_32 res_y, int unit_type)
{
   png_debug1(1, "in %s storage function\n", "pHYs");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->x_pixels_per_unit = res_x;
   info_ptr->y_pixels_per_unit = res_y;
   info_ptr->phys_unit_type = (png_byte)unit_type;
   info_ptr->valid |= PNG_INFO_pHYs;
}
#endif

void
png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
   png_colorp palette, int num_palette)
{
   png_debug1(1, "in %s storage function\n", "PLTE");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->palette = palette;
   info_ptr->num_palette = (png_uint_16)num_palette;
   info_ptr->valid |= PNG_INFO_PLTE;
}

#if defined(PNG_READ_sBIT_SUPPORTED) || defined(PNG_WRITE_sBIT_SUPPORTED)
void
png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
   png_color_8p sig_bit)
{
   png_debug1(1, "in %s storage function\n", "sBIT");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8));
   info_ptr->valid |= PNG_INFO_sBIT;
}
#endif

#if defined(PNG_READ_sRGB_SUPPORTED) || defined(PNG_WRITE_sRGB_SUPPORTED)
void
png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
{
   png_debug1(1, "in %s storage function\n", "sRGB");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   info_ptr->srgb_intent = (png_byte)intent;
   info_ptr->valid |= PNG_INFO_sRGB;
}
void
png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
   int intent)
{
#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED)
   float file_gamma;
#endif
#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED)
   float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
#endif
   png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   png_set_sRGB(png_ptr, info_ptr, intent);

#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED)
   file_gamma = (float).45;
   png_set_gAMA(png_ptr, info_ptr, file_gamma);
#endif

#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED)
   white_x = (float).3127;
   white_y = (float).3290;
   red_x   = (float).64;
   red_y   = (float).33;
   green_x = (float).30;
   green_y = (float).60;
   blue_x  = (float).15;
   blue_y  = (float).06;

   png_set_cHRM(png_ptr, info_ptr,
      white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);

#endif
}
#endif

#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
    defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED)
void
png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
   int num_text)
{
   int i;

   png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
      "text" : (png_const_charp)png_ptr->chunk_name));

   if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
      return;

   /* Make sure we have enough space in the "text" array in info_struct
    * to hold all of the incoming text_ptr objects.
    */
   if (info_ptr->num_text + num_text > info_ptr->max_text)
   {
      if (info_ptr->text != NULL)
      {
         png_textp old_text;
         int old_max;

         old_max = info_ptr->max_text;
         info_ptr->max_text = info_ptr->num_text + num_text + 8;
         old_text = info_ptr->text;
         info_ptr->text = (png_textp)png_malloc(png_ptr,
            (png_uint_32)(info_ptr->max_text * sizeof (png_text)));
         png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
            sizeof(png_text)));
         png_free(png_ptr, old_text);
      }
      else
      {
         info_ptr->max_text = num_text + 8;
         info_ptr->num_text = 0;
         info_ptr->text = (png_textp)png_malloc(png_ptr,
            (png_uint_32)(info_ptr->max_text * sizeof (png_text)));
      }
      png_debug1(3, "allocated %d entries for info_ptr->text\n",
         info_ptr->max_text);
   }

   for (i = 0; i < num_text; i++)
   {
      png_textp textp = &(info_ptr->text[info_ptr->num_text]);

      if (text_ptr[i].text == NULL)
         text_ptr[i].text = (png_charp)"";

      if (text_ptr[i].text[0] == '\0')
      {
         textp->text_length = 0;
         textp->compression = PNG_TEXT_COMPRESSION_NONE;
      }
      else
      {
         textp->text_length = png_strlen(text_ptr[i].text);
         textp->compression = text_ptr[i].compression;
      }
      textp->text = text_ptr[i].text;
      textp->key = text_ptr[i].key;
      info_ptr->num_text++;
      png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
   }
}
#endif

#if defined(PNG_READ_tIME_SUPPORTED) || defined(PNG_WRITE_tIME_SUPPORTED)
void
png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
{
   png_debug1(1, "in %s storage function\n", "tIME");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time));
   info_ptr->valid |= PNG_INFO_tIME;
}
#endif

#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_WRITE_tRNS_SUPPORTED)
void
png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
   png_bytep trans, int num_trans, png_color_16p trans_values)
{
   png_debug1(1, "in %s storage function\n", "tRNS");
   if (png_ptr == NULL || info_ptr == NULL)
      return;

   if (trans != NULL)
   {
      info_ptr->trans = trans;
   }

   if (trans_values != NULL)
   {
      png_memcpy(&(info_ptr->trans_values), trans_values,
         sizeof(png_color_16));
      if (num_trans == 0)
        num_trans = 1;
   }
   info_ptr->num_trans = (png_uint_16)num_trans;
   info_ptr->valid |= PNG_INFO_tRNS;
}
#endif
Commit	Line	Data
c801d85f KB	1
	2	/* pngset.c - storage of image information into info struct
	3	*
	4	* libpng 1.0.1
	5	* For conditions of distribution and use, see copyright notice in png.h
	6	* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
	7	* Copyright (c) 1996, 1997 Andreas Dilger
	8	* Copyright (c) 1998, Glenn Randers-Pehrson
	9	* March 15, 1998
	10	*
	11	* The functions here are used during reads to store data from the file
	12	* into the info struct, and during writes to store application data
	13	* into the info struct for writing into the file. This abstracts the
	14	* info struct and allows us to change the structure in the future.
	15	*/
	16
	17	#define PNG_INTERNAL
	18	#include "png.h"
	19
	20	#if defined(PNG_READ_bKGD_SUPPORTED) \|\| defined(PNG_WRITE_bKGD_SUPPORTED)
	21	void
	22	png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
	23	{
	24	png_debug1(1, "in %s storage function\n", "bKGD");
	25	if (png_ptr == NULL \|\| info_ptr == NULL)
	26	return;
	27
	28	png_memcpy(&(info_ptr->background), background, sizeof(png_color_16));
	29	info_ptr->valid \|= PNG_INFO_bKGD;
	30	}
	31	#endif
	32
	33	#if defined(PNG_READ_cHRM_SUPPORTED) \|\| defined(PNG_WRITE_cHRM_SUPPORTED)
	34	void
	35	png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
	36	double white_x, double white_y, double red_x, double red_y,
	37	double green_x, double green_y, double blue_x, double blue_y)
	38	{
	39	png_debug1(1, "in %s storage function\n", "cHRM");
	40	if (png_ptr == NULL \|\| info_ptr == NULL)
	41	return;
	42
	43	info_ptr->x_white = (float)white_x;
	44	info_ptr->y_white = (float)white_y;
	45	info_ptr->x_red = (float)red_x;
	46	info_ptr->y_red = (float)red_y;
	47	info_ptr->x_green = (float)green_x;
	48	info_ptr->y_green = (float)green_y;
	49	info_ptr->x_blue = (float)blue_x;
	50	info_ptr->y_blue = (float)blue_y;
	51	info_ptr->valid \|= PNG_INFO_cHRM;
	52	}
	53	#endif
	54
	55	#if defined(PNG_READ_gAMA_SUPPORTED) \|\| defined(PNG_WRITE_gAMA_SUPPORTED)
	56	void
	57	png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
	58	{
	59	png_debug1(1, "in %s storage function\n", "gAMA");
	60	if (png_ptr == NULL \|\| info_ptr == NULL)
	61	return;
	62
	63	info_ptr->gamma = (float)file_gamma;
	64	info_ptr->valid \|= PNG_INFO_gAMA;
65	}
66	#endif
67
68	#if defined(PNG_READ_hIST_SUPPORTED) \|\| defined(PNG_WRITE_hIST_SUPPORTED)
69	void
70	png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
71	{
72	png_debug1(1, "in %s storage function\n", "hIST");
73	if (png_ptr == NULL \|\| info_ptr == NULL)
74	return;
75
76	info_ptr->hist = hist;
77	info_ptr->valid \|= PNG_INFO_hIST;
78	}
79	#endif
80
81	void
82	png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
83	png_uint_32 width, png_uint_32 height, int bit_depth,
84	int color_type, int interlace_type, int compression_type,
85	int filter_type)
86	{
87	int rowbytes_per_pixel;
88	png_debug1(1, "in %s storage function\n", "IHDR");
89	if (png_ptr == NULL \|\| info_ptr == NULL)
90	return;
91
92	info_ptr->width = width;
93	info_ptr->height = height;
94	info_ptr->bit_depth = (png_byte)bit_depth;
95	info_ptr->color_type =(png_byte) color_type;
96	info_ptr->compression_type = (png_byte)compression_type;
97	info_ptr->filter_type = (png_byte)filter_type;
98	info_ptr->interlace_type = (png_byte)interlace_type;
99	if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
100	info_ptr->channels = 1;
101	else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
102	info_ptr->channels = 3;
103	else
104	info_ptr->channels = 1;
105	if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
106	info_ptr->channels++;
107	info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
108
109	/* check for overflow */
110	rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3;
111	info_ptr->rowbytes = info_ptr->width * rowbytes_per_pixel;
112	if (( width > (png_uint_32)2147483647L/rowbytes_per_pixel))
113	{
114	png_warning(png_ptr,
115	"Width too large to process image data; rowbytes will overflow.");
116	info_ptr->rowbytes = (png_size_t)0;
117	}
118	}
119
120	#if defined(PNG_READ_oFFs_SUPPORTED) \|\| defined(PNG_WRITE_oFFs_SUPPORTED)
121	void
122	png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
123	png_uint_32 offset_x, png_uint_32 offset_y, int unit_type)
124	{
125	png_debug1(1, "in %s storage function\n", "oFFs");
126	if (png_ptr == NULL \|\| info_ptr == NULL)
127	return;
128
129	info_ptr->x_offset = offset_x;
130	info_ptr->y_offset = offset_y;
131	info_ptr->offset_unit_type = (png_byte)unit_type;
132	info_ptr->valid \|= PNG_INFO_oFFs;
133	}
134	#endif
135
136	#if defined(PNG_READ_pCAL_SUPPORTED) \|\| defined(PNG_WRITE_pCAL_SUPPORTED)
137	void
138	png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
139	png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
140	png_charp units, png_charpp params)
141	{
142	png_uint_32 length;
143	int i;
144
145	png_debug1(1, "in %s storage function\n", "pCAL");
146	if (png_ptr == NULL \|\| info_ptr == NULL)
147	return;
148
149	length = png_strlen(purpose) + 1;
150	png_debug1(3, "allocating purpose for info (%d bytes)\n", length);
151	info_ptr->pcal_purpose = (png_charp)png_malloc(png_ptr, length);
152	png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
153
154	png_debug(3, "storing X0, X1, type, and nparams in info\n");
155	info_ptr->pcal_X0 = X0;
156	info_ptr->pcal_X1 = X1;
157	info_ptr->pcal_type = (png_byte)type;
158	info_ptr->pcal_nparams = (png_byte)nparams;
159
160	length = png_strlen(units) + 1;
161	png_debug1(3, "allocating units for info (%d bytes)\n", length);
162	info_ptr->pcal_units = (png_charp)png_malloc(png_ptr, length);
163	png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
164
165	info_ptr->pcal_params = (png_charpp)png_malloc(png_ptr,
166	(png_uint_32)((nparams + 1) * sizeof(png_charp)));
167	info_ptr->pcal_params[nparams] = NULL;
168
169	for (i = 0; i < nparams; i++)
170	{
171	length = png_strlen(params[i]) + 1;
172	png_debug2(3, "allocating parameter %d for info (%d bytes)\n", i, length);
173	info_ptr->pcal_params[i] = (png_charp)png_malloc(png_ptr, length);
174	png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
175	}
176
177	info_ptr->valid \|= PNG_INFO_pCAL;
178	}
179	#endif
180
181	#if defined(PNG_READ_pHYs_SUPPORTED) \|\| defined(PNG_WRITE_pHYs_SUPPORTED)
182	void
183	png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
184	png_uint_32 res_x, png_uint_32 res_y, int unit_type)
185	{
186	png_debug1(1, "in %s storage function\n", "pHYs");
187	if (png_ptr == NULL \|\| info_ptr == NULL)
188	return;
189
190	info_ptr->x_pixels_per_unit = res_x;
191	info_ptr->y_pixels_per_unit = res_y;
192	info_ptr->phys_unit_type = (png_byte)unit_type;
193	info_ptr->valid \|= PNG_INFO_pHYs;
194	}
195	#endif
196
197	void
198	png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
199	png_colorp palette, int num_palette)
200	{
201	png_debug1(1, "in %s storage function\n", "PLTE");
202	if (png_ptr == NULL \|\| info_ptr == NULL)
203	return;
204
205	info_ptr->palette = palette;
206	info_ptr->num_palette = (png_uint_16)num_palette;
207	info_ptr->valid \|= PNG_INFO_PLTE;
208	}
209
210	#if defined(PNG_READ_sBIT_SUPPORTED) \|\| defined(PNG_WRITE_sBIT_SUPPORTED)
211	void
212	png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
213	png_color_8p sig_bit)
214	{
215	png_debug1(1, "in %s storage function\n", "sBIT");
216	if (png_ptr == NULL \|\| info_ptr == NULL)
217	return;
218
219	png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8));
220	info_ptr->valid \|= PNG_INFO_sBIT;
221	}
222	#endif
223
224	#if defined(PNG_READ_sRGB_SUPPORTED) \|\| defined(PNG_WRITE_sRGB_SUPPORTED)
225	void
226	png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
227	{
228	png_debug1(1, "in %s storage function\n", "sRGB");
229	if (png_ptr == NULL \|\| info_ptr == NULL)
230	return;
231
232	info_ptr->srgb_intent = (png_byte)intent;
233	info_ptr->valid \|= PNG_INFO_sRGB;
234	}
235	void
236	png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
237	int intent)
238	{
239	#if defined(PNG_READ_gAMA_SUPPORTED) \|\| defined(PNG_WRITE_gAMA_SUPPORTED)
240	float file_gamma;
241	#endif
242	#if defined(PNG_READ_cHRM_SUPPORTED) \|\| defined(PNG_WRITE_cHRM_SUPPORTED)
243	float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
244	#endif
245	png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
246	if (png_ptr == NULL \|\| info_ptr == NULL)
247	return;
248
249	png_set_sRGB(png_ptr, info_ptr, intent);
250
251	#if defined(PNG_READ_gAMA_SUPPORTED) \|\| defined(PNG_WRITE_gAMA_SUPPORTED)
252	file_gamma = (float).45;
253	png_set_gAMA(png_ptr, info_ptr, file_gamma);
254	#endif
255
256	#if defined(PNG_READ_cHRM_SUPPORTED) \|\| defined(PNG_WRITE_cHRM_SUPPORTED)
257	white_x = (float).3127;
258	white_y = (float).3290;
259	red_x = (float).64;
260	red_y = (float).33;
261	green_x = (float).30;
262	green_y = (float).60;
263	blue_x = (float).15;
264	blue_y = (float).06;
265
266	png_set_cHRM(png_ptr, info_ptr,
267	white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
268
269	#endif
270	}
271	#endif
272
273	#if defined(PNG_READ_tEXt_SUPPORTED) \|\| defined(PNG_WRITE_tEXt_SUPPORTED) \|\| \
274	defined(PNG_READ_zTXt_SUPPORTED) \|\| defined(PNG_WRITE_zTXt_SUPPORTED)
275	void
276	png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
277	int num_text)
278	{
279	int i;
280
281	png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
282	"text" : (png_const_charp)png_ptr->chunk_name));
283
284	if (png_ptr == NULL \|\| info_ptr == NULL \|\| num_text == 0)
285	return;
286
287	/* Make sure we have enough space in the "text" array in info_struct
288	* to hold all of the incoming text_ptr objects.
289	*/
290	if (info_ptr->num_text + num_text > info_ptr->max_text)
291	{
292	if (info_ptr->text != NULL)
293	{
294	png_textp old_text;
295	int old_max;
296
297	old_max = info_ptr->max_text;
298	info_ptr->max_text = info_ptr->num_text + num_text + 8;
299	old_text = info_ptr->text;
300	info_ptr->text = (png_textp)png_malloc(png_ptr,
301	(png_uint_32)(info_ptr->max_text * sizeof (png_text)));
302	png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
303	sizeof(png_text)));
304	png_free(png_ptr, old_text);
305	}
306	else
307	{
308	info_ptr->max_text = num_text + 8;
309	info_ptr->num_text = 0;
310	info_ptr->text = (png_textp)png_malloc(png_ptr,
311	(png_uint_32)(info_ptr->max_text * sizeof (png_text)));
312	}
313	png_debug1(3, "allocated %d entries for info_ptr->text\n",
314	info_ptr->max_text);
315	}
316
317	for (i = 0; i < num_text; i++)
318	{
319	png_textp textp = &(info_ptr->text[info_ptr->num_text]);
320
321	if (text_ptr[i].text == NULL)
322	text_ptr[i].text = (png_charp)"";
323
324	if (text_ptr[i].text[0] == '\0')
325	{
326	textp->text_length = 0;
327	textp->compression = PNG_TEXT_COMPRESSION_NONE;
328	}
329	else
330	{
331	textp->text_length = png_strlen(text_ptr[i].text);
332	textp->compression = text_ptr[i].compression;
333	}
334	textp->text = text_ptr[i].text;
335	textp->key = text_ptr[i].key;
336	info_ptr->num_text++;
337	png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
338	}
339	}
340	#endif
341
342	#if defined(PNG_READ_tIME_SUPPORTED) \|\| defined(PNG_WRITE_tIME_SUPPORTED)
343	void
344	png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
345	{
346	png_debug1(1, "in %s storage function\n", "tIME");
347	if (png_ptr == NULL \|\| info_ptr == NULL)
348	return;
349
350	png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time));
351	info_ptr->valid \|= PNG_INFO_tIME;
352	}
353	#endif
354
355	#if defined(PNG_READ_tRNS_SUPPORTED) \|\| defined(PNG_WRITE_tRNS_SUPPORTED)
356	void
357	png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
358	png_bytep trans, int num_trans, png_color_16p trans_values)
359	{
360	png_debug1(1, "in %s storage function\n", "tRNS");
361	if (png_ptr == NULL \|\| info_ptr == NULL)
362	return;
363
364	if (trans != NULL)
365	{
366	info_ptr->trans = trans;
367	}
368
369	if (trans_values != NULL)
370	{
371	png_memcpy(&(info_ptr->trans_values), trans_values,
372	sizeof(png_color_16));
373	if (num_trans == 0)
374	num_trans = 1;
375	}
376	info_ptr->num_trans = (png_uint_16)num_trans;
377	info_ptr->valid \|= PNG_INFO_tRNS;
378	}
379	#endif
380