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making png with palette

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This commit is contained in:
Anshul Maheshwari 2014-05-26 00:15:58 +05:30
parent 1c7f35d4a1
commit a179dfea91
1 changed files with 121 additions and 2 deletions
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123
src/dvb_subtitle_decoder.c
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@ -208,6 +208,126 @@ static void freep(void *arg)
}
#ifdef DEBUG
static int png_save1(const char *filename, uint8_t *bitmap, int w, int h,uint32_t *clut)
{
FILE *f = NULL;
png_structp png_ptr = NULL;
png_infop info_ptr = NULL;
png_bytep* row_pointer = NULL;
int i, j, ret;
int k = 0;
static png_color palette[10] =
{
{ 0xff, 0xff, 0xff }, // COL_WHITE = 0,
{ 0x00, 0xff, 0x00 }, // COL_GREEN = 1,
{ 0x00, 0x00, 0xff }, // COL_BLUE = 2,
{ 0x00, 0xff, 0xff }, // COL_CYAN = 3,
{ 0xff, 0x00, 0x00 }, // COL_RED = 4,
{ 0xff, 0xff, 0x00 }, // COL_YELLOW = 5,
{ 0xff, 0x00, 0xff }, // COL_MAGENTA = 6,
{ 0xff, 0xff, 0xff }, // COL_USERDEFINED = 7,
{ 0x00, 0x00, 0x00 }, // COL_BLACK = 8
{ 0x00, 0x00, 0x00 } // COL_TRANSPARENT = 9
};
static png_byte alpha[10] =
{
255,
255,
255,
255,
255,
255,
255,
255,
255,
0
};
f = fopen(filename, "wb");
if (!f)
{
mprint("DVB:unable to open %s in write mode \n", filename);
ret = -1;
goto end;
}
if (!(png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL,
NULL )))
{
mprint("DVB:unable to create png write struct\n");
goto end;
}
if (!(info_ptr = png_create_info_struct(png_ptr)))
{
mprint("DVB:unable to create png info struct\n");
ret = -1;
goto end;
}
row_pointer = (png_bytep*) malloc(sizeof(png_bytep) * h);
if (!row_pointer)
{
mprint("DVB: unable to allocate row_pointer\n");
ret = -1;
goto end;
}
memset(row_pointer, 0, sizeof(png_bytep) * h);
png_init_io(png_ptr, f);
png_set_IHDR (png_ptr,
info_ptr,
w,
h,
/* bit_depth */ 8,
PNG_COLOR_TYPE_PALETTE,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
png_set_PLTE (png_ptr, info_ptr, palette, sizeof(palette) / sizeof(palette[0]));
png_set_tRNS (png_ptr, info_ptr, alpha, sizeof(alpha) / sizeof(alpha[0]), NULL);
for (i = 0; i < h; i++)
{
row_pointer[i] = (png_byte*) malloc(
png_get_rowbytes(png_ptr, info_ptr));
if (row_pointer[i] == NULL )
break;
}
if (i != h)
{
mprint("DVB: unable to allocate row_pointer internals\n");
ret = -1;
goto end;
}
png_write_info(png_ptr, info_ptr);
for (i = 0; i < h; i++)
{
for (j = 0; j < png_get_rowbytes(png_ptr, info_ptr); j ++)
{
k = bitmap[i * w + (j)];
row_pointer[i][j] = k;//((k >> 16) & 0xff);
}
}
png_write_image(png_ptr, row_pointer);
png_write_end(png_ptr, info_ptr);
end:if (row_pointer)
{
for (i = 0; i < h; i++)
freep(&row_pointer[i]);
freep(&row_pointer);
}
png_destroy_write_struct(&png_ptr, &info_ptr);
if (f)
fclose(f);
return ret;
}
static int png_save(const char *filename, uint32_t *bitmap, int w, int h)
{
FILE *f = NULL;
@ -1479,7 +1599,6 @@ static void save_display_set(DVBSubContext *ctx)
int x, y, y_off, x_off;
uint32_t *pbuf;
char *filename;
static int fileno_index = 0;
void *sp = ctx->out->spupng_data;
long long start = get_visible_start();
x_pos = -1;
@ -1571,11 +1690,11 @@ static void save_display_set(DVBSubContext *ctx)
}
png_save(filename, pbuf, width, height);
//png_save1(filename, region->pbuf, region->width, region->height,clut->clut16);
free(pbuf);
}
fileno_index++;
}
#endif