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Image translate moves forward a little, towards colour support

This commit is contained in:
Steve Underwood 2012-08-08 21:26:06 +08:00
parent bb96d091fc
commit 42c5ab08d3
4 changed files with 489 additions and 73 deletions
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264
libs/spandsp/src/image_translate.c
View File

@ -2,8 +2,9 @@
* SpanDSP - a series of DSP components for telephony
*
* image_translate.c - Image translation routines for reworking colour
* and gray scale images to be bi-level images of an
* appropriate size to be FAX compatible.
* and gray scale images to be colour, gray scale or
* bi-level images of an appropriate size to be FAX
* compatible.
*
* Written by Steve Underwood <steveu@coppice.org>
*
@ -80,69 +81,237 @@
#include "spandsp/private/t4_rx.h"
#include "spandsp/private/t4_tx.h"
static int image_colour16_to_gray8_row(uint8_t mono[], uint16_t colour[], int pixels)
static int image_colour16_to_colour8_row(uint8_t colour8[], uint16_t colour16[], int pixels)
{
int i;
for (i = 0; i < 3*pixels; i++)
colour8[i] = colour16[i] >> 8;
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int image_colour16_to_gray16_row(uint16_t gray16[], uint16_t colour16[], int pixels)
{
int i;
uint32_t gray;
for (i = 0; i < pixels; i++)
{
gray = colour[3*i]*19595 + colour[3*i + 1]*38469 + colour[3*i + 2]*7472;
mono[i] = saturateu8(gray >> 24);
gray = colour16[3*i]*19595 + colour16[3*i + 1]*38469 + colour16[3*i + 2]*7472;
gray16[i] = saturateu16(gray >> 16);
}
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int image_colour8_to_gray8_row(uint8_t mono[], uint8_t colour[], int pixels)
static int image_colour16_to_gray8_row(uint8_t gray8[], uint16_t colour16[], int pixels)
{
int i;
uint32_t gray;
for (i = 0; i < pixels; i++)
{
gray = colour[3*i]*19595 + colour[3*i + 1]*38469 + colour[3*i + 2]*7472;
mono[i] = saturateu8(gray >> 16);
gray = colour16[3*i]*19595 + colour16[3*i + 1]*38469 + colour16[3*i + 2]*7472;
gray8[i] = saturateu8(gray >> 24);
}
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int image_gray16_to_gray8_row(uint8_t mono[], uint16_t gray[], int pixels)
static int image_colour8_to_gray16_row(uint16_t gray16[], uint8_t colour8[], int pixels)
{
int i;
uint32_t gray;
for (i = 0; i < pixels; i++)
mono[i] = gray[i] >> 8;
{
gray = colour8[3*i]*19595 + colour8[3*i + 1]*38469 + colour8[3*i + 2]*7472;
gray16[i] = saturateu16(gray >> 8);
}
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int get_and_scrunch_row(image_translate_state_t *s, uint8_t buf[], size_t len)
static int image_colour8_to_gray8_row(uint8_t gray8[], uint8_t colour8[], int pixels)
{
int row_len;
int i;
uint32_t gray;
row_len = (*s->row_read_handler)(s->row_read_user_data, buf, s->input_width*s->bytes_per_pixel);
if (row_len != s->input_width*s->bytes_per_pixel)
for (i = 0; i < pixels; i++)
{
gray = colour8[3*i]*19595 + colour8[3*i + 1]*38469 + colour8[3*i + 2]*7472;
gray8[i] = saturateu8(gray >> 16);
}
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int image_colour8_to_colour16_row(uint16_t colour16[], uint8_t colour8[], int pixels)
{
int i;
for (i = 3*pixels - 1; i >= 0; i--)
colour16[i] = colour8[i] << 8;
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int image_gray16_to_colour16_row(uint16_t colour16[], uint16_t gray16[], int pixels)
{
int i;
for (i = pixels - 1; i >= 0; i--)
{
/* TODO: need to balance the colours */
colour16[3*i] = gray16[i];
colour16[3*i + 1] = gray16[i];
colour16[3*i + 2] = gray16[i];
}
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int image_gray16_to_colour8_row(uint8_t colour8[], uint16_t gray16[], int pixels)
{
int i;
for (i = pixels - 1; i >= 0; i--)
{
/* TODO: need to balance the colours */
colour8[3*i] = gray16[i] >> 8;
colour8[3*i + 1] = gray16[i] >> 8;
colour8[3*i + 2] = gray16[i] >> 8;
}
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int image_gray16_to_gray8_row(uint8_t gray8[], uint16_t gray16[], int pixels)
{
int i;
for (i = 0; i < pixels; i++)
gray8[i] = gray16[i] >> 8;
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int image_gray8_to_colour16_row(uint16_t colour16[], uint8_t gray8[], int pixels)
{
int i;
for (i = pixels - 1; i >= 0; i--)
{
/* TODO: need to balance the colours */
colour16[3*i] = gray8[i] << 8;
colour16[3*i + 1] = gray8[i] << 8;
colour16[3*i + 2] = gray8[i] << 8;
}
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int image_gray8_to_colour8_row(uint8_t colour8[], uint8_t gray8[], int pixels)
{
int i;
for (i = pixels - 1; i >= 0; i--)
{
/* TODO: need to balance the colours */
colour8[3*i] = gray8[i];
colour8[3*i + 1] = gray8[i];
colour8[3*i + 2] = gray8[i];
}
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int image_gray8_to_gray16_row(uint16_t gray16[], uint8_t gray8[], int pixels)
{
int i;
for (i = pixels - 1; i >= 0; i--)
gray16[i] = gray8[i] << 8;
return pixels;
}
/*- End of function --------------------------------------------------------*/
static int get_and_scrunch_row(image_translate_state_t *s, uint8_t buf[])
{
int input_row_len;
input_row_len = (*s->row_read_handler)(s->row_read_user_data, buf, s->input_width*s->input_bytes_per_pixel);
if (input_row_len != s->input_width*s->input_bytes_per_pixel)
return 0;
/* Scrunch colour down to gray, and scrunch 16 bit pixels down to 8 bit pixels */
/* Scrunch colour down to gray, vice versa. Scrunch 16 bit pixels down to 8 bit pixels, or vice versa. */
switch (s->input_format)
{
case T4_IMAGE_TYPE_GRAY_12BIT:
image_gray16_to_gray8_row(buf, (uint16_t *) buf, s->input_width);
switch (s->output_format)
{
case T4_IMAGE_TYPE_BILEVEL:
case T4_IMAGE_TYPE_GRAY_8BIT:
image_gray16_to_gray8_row(buf, (uint16_t *) buf, s->input_width);
break;
case T4_IMAGE_TYPE_COLOUR_12BIT:
image_gray16_to_colour16_row((uint16_t *) buf, (uint16_t *) buf, s->input_width);
break;
case T4_IMAGE_TYPE_COLOUR_8BIT:
image_gray16_to_colour8_row(buf, (uint16_t *) buf, s->input_width);
break;
}
break;
case T4_IMAGE_TYPE_GRAY_8BIT:
switch (s->output_format)
{
case T4_IMAGE_TYPE_GRAY_12BIT:
image_gray8_to_gray16_row((uint16_t *) buf, buf, s->input_width);
break;
case T4_IMAGE_TYPE_COLOUR_12BIT:
image_gray8_to_colour16_row((uint16_t *) buf, buf, s->input_width);
break;
case T4_IMAGE_TYPE_COLOUR_8BIT:
image_gray8_to_colour8_row(buf, buf, s->input_width);
break;
}
break;
case T4_IMAGE_TYPE_COLOUR_12BIT:
image_colour16_to_gray8_row(buf, (uint16_t *) buf, s->input_width);
switch (s->output_format)
{
case T4_IMAGE_TYPE_GRAY_12BIT:
image_colour16_to_gray16_row((uint16_t *) buf, (uint16_t *) buf, s->input_width);
break;
case T4_IMAGE_TYPE_BILEVEL:
case T4_IMAGE_TYPE_GRAY_8BIT:
image_colour16_to_gray8_row(buf, (uint16_t *) buf, s->input_width);
break;
case T4_IMAGE_TYPE_COLOUR_8BIT:
image_colour16_to_colour8_row(buf, (uint16_t *) buf, s->input_width);
break;
}
break;
case T4_IMAGE_TYPE_COLOUR_8BIT:
image_colour8_to_gray8_row(buf, buf, s->input_width);
switch (s->output_format)
{
case T4_IMAGE_TYPE_GRAY_12BIT:
image_colour8_to_gray16_row((uint16_t *) buf, buf, s->input_width);
break;
case T4_IMAGE_TYPE_BILEVEL:
case T4_IMAGE_TYPE_GRAY_8BIT:
image_colour8_to_gray8_row(buf, buf, s->input_width);
break;
case T4_IMAGE_TYPE_COLOUR_12BIT:
image_colour8_to_colour16_row((uint16_t *) buf, buf, s->input_width);
break;
}
break;
}
return row_len;
return s->output_width;
}
/*- End of function --------------------------------------------------------*/
static int image_resize_row(image_translate_state_t *s, uint8_t buf[], size_t len)
static int image_resize_row(image_translate_state_t *s, uint8_t buf[])
{
int i;
int output_width;
@ -184,8 +353,8 @@ static int image_resize_row(image_translate_state_t *s, uint8_t buf[], size_t le
s->raw_output_row = -1;
break;
}
row_len = get_and_scrunch_row(s, s->raw_pixel_row[0], s->input_width*s->bytes_per_pixel);
if (row_len != s->input_width*s->bytes_per_pixel)
row_len = get_and_scrunch_row(s, s->raw_pixel_row[0]);
if (row_len != s->output_width)
{
s->raw_output_row = -1;
return 0;
@ -221,7 +390,7 @@ static int image_resize_row(image_translate_state_t *s, uint8_t buf[], size_t le
#endif
if (++s->raw_output_row >= s->output_length)
s->raw_output_row = -1;
return len;
return s->output_width;
}
/*- End of function --------------------------------------------------------*/
@ -335,6 +504,7 @@ SPAN_DECLARE(int) image_translate_row(image_translate_state_t *s, uint8_t buf[],
- At the last row we dither and output, without getting an extra row in. */
for (i = (y == 0) ? 0 : 1; i < 2; i++)
{
/* Swap the row buffers */
p = s->pixel_row[0];
s->pixel_row[0] = s->pixel_row[1];
s->pixel_row[1] = p;
@ -344,17 +514,24 @@ SPAN_DECLARE(int) image_translate_row(image_translate_state_t *s, uint8_t buf[],
will fail, with the end of image condition (i.e. returning zero length) */
if (s->resize)
{
if (image_resize_row(s, s->pixel_row[1], s->output_width*s->bytes_per_pixel) != s->output_width*s->bytes_per_pixel)
if (image_resize_row(s, s->pixel_row[1]) != s->output_width)
s->output_row = -1;
}
else
{
if (get_and_scrunch_row(s, s->pixel_row[1], s->output_width*s->bytes_per_pixel) != s->output_width*s->bytes_per_pixel)
if (get_and_scrunch_row(s, s->pixel_row[1]) != s->output_width)
s->output_row = -1;
}
}
if (s->output_format == T4_IMAGE_TYPE_BILEVEL)
{
i = floyd_steinberg_dither_row(s, buf, y);
}
else
{
i = s->output_width*s->output_bytes_per_pixel;
memcpy(buf, s->pixel_row[1], i);
}
return i;
}
/*- End of function --------------------------------------------------------*/
@ -413,19 +590,38 @@ SPAN_DECLARE(image_translate_state_t *) image_translate_init(image_translate_sta
switch (s->input_format)
{
case T4_IMAGE_TYPE_GRAY_8BIT:
s->bytes_per_pixel = 1;
s->input_bytes_per_pixel = 1;
break;
case T4_IMAGE_TYPE_GRAY_12BIT:
s->bytes_per_pixel = 2;
s->input_bytes_per_pixel = 2;
break;
case T4_IMAGE_TYPE_COLOUR_8BIT:
s->bytes_per_pixel = 3;
s->input_bytes_per_pixel = 3;
break;
case T4_IMAGE_TYPE_COLOUR_12BIT:
s->bytes_per_pixel = 6;
s->input_bytes_per_pixel = 6;
break;
default:
s->bytes_per_pixel = 1;
s->input_bytes_per_pixel = 1;
break;
}
switch (s->output_format)
{
case T4_IMAGE_TYPE_GRAY_8BIT:
s->output_bytes_per_pixel = 1;
break;
case T4_IMAGE_TYPE_GRAY_12BIT:
s->output_bytes_per_pixel = 2;
break;
case T4_IMAGE_TYPE_COLOUR_8BIT:
s->output_bytes_per_pixel = 3;
break;
case T4_IMAGE_TYPE_COLOUR_12BIT:
s->output_bytes_per_pixel = 6;
break;
default:
s->output_bytes_per_pixel = 1;
break;
}
@ -434,9 +630,9 @@ SPAN_DECLARE(image_translate_state_t *) image_translate_init(image_translate_sta
{
for (i = 0; i < 2; i++)
{
if ((s->raw_pixel_row[i] = (uint8_t *) malloc(s->input_width*s->bytes_per_pixel)) == NULL)
if ((s->raw_pixel_row[i] = (uint8_t *) malloc(s->input_width*s->input_bytes_per_pixel)) == NULL)
return NULL;
memset(s->raw_pixel_row[i], 0, s->input_width*s->bytes_per_pixel);
memset(s->raw_pixel_row[i], 0, s->input_width*s->input_bytes_per_pixel);
if ((s->pixel_row[i] = (uint8_t *) malloc(s->output_width*sizeof(uint8_t))) == NULL)
return NULL;
memset(s->pixel_row[i], 0, s->output_width*sizeof(uint8_t));
@ -446,9 +642,9 @@ SPAN_DECLARE(image_translate_state_t *) image_translate_init(image_translate_sta
{
for (i = 0; i < 2; i++)
{
if ((s->pixel_row[i] = (uint8_t *) malloc(s->output_width*s->bytes_per_pixel)) == NULL)
if ((s->pixel_row[i] = (uint8_t *) malloc(s->output_width*s->input_bytes_per_pixel)) == NULL)
return NULL;
memset(s->pixel_row[i], 0, s->output_width*s->bytes_per_pixel);
memset(s->pixel_row[i], 0, s->output_width*s->input_bytes_per_pixel);
}
}

5
libs/spandsp/src/spandsp/image_translate.h
View File

@ -2,8 +2,9 @@
* SpanDSP - a series of DSP components for telephony
*
* image_translate.h - Image translation routines for reworking colour
* and gray scale images to be bi-level images of an
* appropriate size to be FAX compatible.
* and gray scale images to be colour, gray scale or
* bi-level images of an appropriate size to be FAX
* compatible.
*
* Written by Steve Underwood <steveu@coppice.org>
*

5
libs/spandsp/src/spandsp/private/image_translate.h
View File

@ -1,7 +1,7 @@
/*
* SpanDSP - a series of DSP components for telephony
*
* private/image_translate.c - Image translation routines for reworking colour
* private/image_translate.h - Image translation routines for reworking colour
* and gray scale images to be bi-level images of an
* appropriate size to be FAX compatible.
*
@ -33,11 +33,12 @@ struct image_translate_state_s
int input_format;
int input_width;
int input_length;
int input_bytes_per_pixel;
int output_format;
int output_width;
int output_length;
int output_bytes_per_pixel;
int resize;
int bytes_per_pixel;
int raw_input_row;
int raw_output_row;
int output_row;

288
libs/spandsp/tests/image_translate_tests.c
View File

@ -159,7 +159,7 @@ static int row_read(void *user_data, uint8_t buf[], size_t len)
}
/*- End of function --------------------------------------------------------*/
static void get_flattened_image(image_translate_state_t *s, int compare)
static void get_bilevel_image(image_translate_state_t *s, int compare)
{
int i;
int len;
@ -191,12 +191,147 @@ static void get_flattened_image(image_translate_state_t *s, int compare)
}
/*- End of function --------------------------------------------------------*/
static void get_gray8_image(image_translate_state_t *s, int compare)
{
int i;
int j;
int len;
uint8_t row_buf[5000];
for (i = 0; i < s->output_length; i++)
{
if ((len = image_translate_row(s, row_buf, s->output_width)) != s->output_width)
{
printf("Image finished early - %d %d\n", len, s->output_width);
exit(2);
}
if (compare)
{
for (j = 0; j < 50; j++)
{
if (row_buf[j] != j*1200/256)
{
printf("Image mismatch - %d - %d\n", j, row_buf[3*j]);
exit(2);
}
}
}
}
if ((len = image_translate_row(s, row_buf, s->output_width)) != 0)
{
printf("Image finished late - %d %d\n", len, s->output_width);
exit(2);
}
}
/*- End of function --------------------------------------------------------*/
static void get_gray16_image(image_translate_state_t *s, int compare)
{
int i;
int j;
int len;
uint16_t row_buf[5000];
for (i = 0; i < s->output_length; i++)
{
if ((len = image_translate_row(s, (uint8_t *) row_buf, 2*s->output_width)) != 2*s->output_width)
{
printf("Image finished early - %d %d\n", len, 2*s->output_width);
exit(2);
}
if (compare)
{
for (j = 0; j < 50; j++)
{
if (row_buf[j] != j*1200)
{
printf("Image mismatch - %d - %d\n", j, row_buf[j]);
exit(2);
}
}
}
}
if ((len = image_translate_row(s, (uint8_t *) row_buf, 2*s->output_width)) != 0)
{
printf("Image finished late - %d %d\n", len, 2*s->output_width);
exit(2);
}
}
/*- End of function --------------------------------------------------------*/
static void get_colour8_image(image_translate_state_t *s, int compare)
{
int i;
int j;
int len;
uint8_t row_buf[5000];
for (i = 0; i < s->output_length; i++)
{
if ((len = image_translate_row(s, row_buf, 3*s->output_width)) != 3*s->output_width)
{
printf("Image finished early - %d %d\n", len, 3*s->output_width);
exit(2);
}
if (compare)
{
for (j = 0; j < 50; j++)
{
if (row_buf[3*j + 0] != j*1200/256 || row_buf[3*j + 1] != j*1200/256 || row_buf[3*j + 2] != j*1200/256)
{
printf("Image mismatch - %d - %d %d %d\n", j, row_buf[3*j + 0], row_buf[3*j + 1], row_buf[3*j + 2]);
exit(2);
}
}
}
}
if ((len = image_translate_row(s, row_buf, 2*s->output_width)) != 0)
{
printf("Image finished late - %d %d\n", len, 3*s->output_width);
exit(2);
}
}
/*- End of function --------------------------------------------------------*/
static void get_colour16_image(image_translate_state_t *s, int compare)
{
int i;
int j;
int len;
uint16_t row_buf[5000];
for (i = 0; i < s->output_length; i++)
{
if ((len = image_translate_row(s, (uint8_t *) row_buf, 6*s->output_width)) != 6*s->output_width)
{
printf("Image finished early - %d %d\n", len, 6*s->output_width);
exit(2);
}
if (compare)
{
for (j = 0; j < 50; j++)
{
if (row_buf[3*j + 0] != j*1200 || row_buf[3*j + 1] != j*1200 || row_buf[3*j + 2] != j*1200)
{
printf("Image mismatch - %d - %d %d %d\n", j, row_buf[3*j + 0], row_buf[3*j + 1], row_buf[3*j + 2]);
exit(2);
}
}
}
}
if ((len = image_translate_row(s, (uint8_t *) row_buf, 6*s->output_width)) != 0)
{
printf("Image finished late - %d %d\n", len, 6*s->output_width);
exit(2);
}
}
/*- End of function --------------------------------------------------------*/
static void dither_tests_gray16(void)
{
int i;
int j;
image_translate_state_t bw;
image_translate_state_t *s = &bw;
image_translate_state_t *s;
uint16_t image[50*50];
image_descriptor_t im;
@ -213,8 +348,9 @@ static void dither_tests_gray16(void)
image[i*im.width + j] = j*1200;
}
s = image_translate_init(s, T4_IMAGE_TYPE_GRAY_12BIT, im.width, im.length, T4_IMAGE_TYPE_BILEVEL, -1, -1, row_read, &im);
get_flattened_image(s, TRUE);
s = image_translate_init(NULL, T4_IMAGE_TYPE_GRAY_12BIT, im.width, im.length, T4_IMAGE_TYPE_BILEVEL, -1, -1, row_read, &im);
get_bilevel_image(s, TRUE);
image_translate_free(s);
}
/*- End of function --------------------------------------------------------*/
@ -222,8 +358,7 @@ static void dither_tests_gray8(void)
{
int i;
int j;
image_translate_state_t bw;
image_translate_state_t *s = &bw;
image_translate_state_t *s;
uint8_t image[50*50];
image_descriptor_t im;
@ -239,8 +374,10 @@ static void dither_tests_gray8(void)
for (j = 0; j < im.width; j++)
image[i*im.width + j] = j*1200/256;
}
s = image_translate_init(s, T4_IMAGE_TYPE_GRAY_8BIT, im.width, im.length, T4_IMAGE_TYPE_BILEVEL, -1, -1, row_read, &im);
get_flattened_image(s, TRUE);
s = image_translate_init(NULL, T4_IMAGE_TYPE_GRAY_8BIT, im.width, im.length, T4_IMAGE_TYPE_BILEVEL, -1, -1, row_read, &im);
get_bilevel_image(s, TRUE);
image_translate_free(s);
}
/*- End of function --------------------------------------------------------*/
@ -248,8 +385,7 @@ static void dither_tests_colour16(void)
{
int i;
int j;
image_translate_state_t bw;
image_translate_state_t *s = &bw;
image_translate_state_t *s;
uint16_t image[50*50*3];
image_descriptor_t im;
@ -264,13 +400,96 @@ static void dither_tests_colour16(void)
{
for (j = 0; j < im.width; j++)
{
image[i*3*im.width + 3*j + 0] = j*1200;
image[i*3*im.width + 3*j + 1] = j*1200;
image[i*3*im.width + 3*j + 2] = j*1200;
image[i*3*im.width + 3*j + 0] = j*1200 + i;
image[i*3*im.width + 3*j + 1] = j*1200 + i;
image[i*3*im.width + 3*j + 2] = j*1200 + i;
}
}
s = image_translate_init(s, T4_IMAGE_TYPE_COLOUR_12BIT, im.width, im.length, T4_IMAGE_TYPE_BILEVEL, -1, -1, row_read, &im);
get_flattened_image(s, TRUE);
s = image_translate_init(NULL, T4_IMAGE_TYPE_COLOUR_12BIT, im.width, im.length, T4_IMAGE_TYPE_BILEVEL, -1, -1, row_read, &im);
get_bilevel_image(s, TRUE);
printf("Scrunching from a 3x16 bit per sample colour to 8 bit per sample gray scale\n");
im.image = (const uint8_t *) image;
im.width = 50;
im.length = 50;
im.bytes_per_pixel = 6;
im.current_row = 0;
for (i = 0; i < im.length; i++)
{
for (j = 0; j < im.width; j++)
{
image[i*3*im.width + 3*j + 0] = j*1200 + i;
image[i*3*im.width + 3*j + 1] = j*1200 + i;
image[i*3*im.width + 3*j + 2] = j*1200 + i;
}
}
s = image_translate_init(s, T4_IMAGE_TYPE_COLOUR_12BIT, im.width, im.length, T4_IMAGE_TYPE_GRAY_8BIT, -1, -1, row_read, &im);
get_gray8_image(s, TRUE);
printf("Scrunching from a 3x16 bit per sample colour to 16 bit per sample gray scale\n");
im.image = (const uint8_t *) image;
im.width = 50;
im.length = 50;
im.bytes_per_pixel = 6;
im.current_row = 0;
for (i = 0; i < im.length; i++)
{
for (j = 0; j < im.width; j++)
{
image[i*3*im.width + 3*j + 0] = j*1200 + i;
image[i*3*im.width + 3*j + 1] = j*1200 + i;
image[i*3*im.width + 3*j + 2] = j*1200 + i;
}
}
s = image_translate_init(s, T4_IMAGE_TYPE_COLOUR_12BIT, im.width, im.length, T4_IMAGE_TYPE_GRAY_12BIT, -1, -1, row_read, &im);
get_gray16_image(s, TRUE);
printf("Scrunching from a 3x16 bit per sample colour to 3x8 bit per sample colour\n");
im.image = (const uint8_t *) image;
im.width = 50;
im.length = 50;
im.bytes_per_pixel = 6;
im.current_row = 0;
for (i = 0; i < im.length; i++)
{
for (j = 0; j < im.width; j++)
{
image[i*3*im.width + 3*j + 0] = j*1200 + i;
image[i*3*im.width + 3*j + 1] = j*1200 + i;
image[i*3*im.width + 3*j + 2] = j*1200 + i;
}
}
s = image_translate_init(s, T4_IMAGE_TYPE_COLOUR_12BIT, im.width, im.length, T4_IMAGE_TYPE_COLOUR_8BIT, -1, -1, row_read, &im);
get_colour8_image(s, TRUE);
printf("Scrunching from a 3x16 bit per sample colour to 3x16 bit per sample colour\n");
im.image = (const uint8_t *) image;
im.width = 50;
im.length = 50;
im.bytes_per_pixel = 6;
im.current_row = 0;
for (i = 0; i < im.length; i++)
{
for (j = 0; j < im.width; j++)
{
image[i*3*im.width + 3*j + 0] = j*1200 + i;
image[i*3*im.width + 3*j + 1] = j*1200 + i;
image[i*3*im.width + 3*j + 2] = j*1200 + i;
}
}
s = image_translate_init(s, T4_IMAGE_TYPE_COLOUR_12BIT, im.width, im.length, T4_IMAGE_TYPE_COLOUR_12BIT, -1, -1, row_read, &im);
get_colour16_image(s, TRUE);
image_translate_free(s);
}
/*- End of function --------------------------------------------------------*/
@ -278,8 +497,7 @@ static void dither_tests_colour8(void)
{
int i;
int j;
image_translate_state_t bw;
image_translate_state_t *s = &bw;
image_translate_state_t *s;
uint8_t image[50*50*3];
image_descriptor_t im;
@ -294,14 +512,15 @@ static void dither_tests_colour8(void)
{
for (j = 0; j < im.width; j++)
{
image[i*3*im.width + 3*j + 0] = j*1200/256;
image[i*3*im.width + 3*j + 1] = j*1200/256;
image[i*3*im.width + 3*j + 2] = j*1200/256;
image[i*3*im.width + 3*j + 0] = j*1200/256 + i;
image[i*3*im.width + 3*j + 1] = j*1200/256 + i;
image[i*3*im.width + 3*j + 2] = j*1200/256 + i;
}
}
s = image_translate_init(s, T4_IMAGE_TYPE_COLOUR_8BIT, im.width, im.length, T4_IMAGE_TYPE_BILEVEL, -1, -1, row_read, &im);
get_flattened_image(s, TRUE);
s = image_translate_init(NULL, T4_IMAGE_TYPE_COLOUR_8BIT, im.width, im.length, T4_IMAGE_TYPE_BILEVEL, -1, -1, row_read, &im);
get_bilevel_image(s, TRUE);
image_translate_free(s);
}
/*- End of function --------------------------------------------------------*/
@ -309,8 +528,7 @@ static void grow_tests_colour8(void)
{
int i;
int j;
image_translate_state_t resize;
image_translate_state_t *s1 = &resize;
image_translate_state_t *s;
uint8_t image[50*50*3];
image_descriptor_t im;
@ -325,15 +543,15 @@ static void grow_tests_colour8(void)
{
for (j = 0; j < im.width; j++)
{
image[i*3*im.width + 3*j + 0] = j*1200/256;
image[i*3*im.width + 3*j + 1] = j*1200/256;
image[i*3*im.width + 3*j + 2] = j*1200/256;
image[i*3*im.width + 3*j + 0] = j*1200/256 + i;
image[i*3*im.width + 3*j + 1] = j*1200/256 + i;
image[i*3*im.width + 3*j + 2] = j*1200/256 + i;
}
}
s1 = image_translate_init(s1, T4_IMAGE_TYPE_COLOUR_8BIT, im.width, im.length, T4_IMAGE_TYPE_BILEVEL, 200, -1, row_read, &im);
get_flattened_image(s1, FALSE);
s = image_translate_init(NULL, T4_IMAGE_TYPE_COLOUR_8BIT, im.width, im.length, T4_IMAGE_TYPE_BILEVEL, 200, -1, row_read, &im);
get_bilevel_image(s, FALSE);
image_translate_free(s);
}
/*- End of function --------------------------------------------------------*/
@ -352,8 +570,7 @@ static void lenna_tests(int output_width, int output_length_scaling, const char
int16_t samples_per_pixel;
int i;
int n;
image_translate_state_t bw;
image_translate_state_t *s = &bw;
image_translate_state_t *s;
image_descriptor_t im;
float x_resolution;
float y_resolution;
@ -375,7 +592,7 @@ static void lenna_tests(int output_width, int output_length_scaling, const char
y_resolution = 200.0;
TIFFGetField(in_file, TIFFTAG_YRESOLUTION, &y_resolution);
res_unit = RESUNIT_INCH;
TIFFSetField(in_file, TIFFTAG_RESOLUTIONUNIT, &res_unit);
TIFFGetField(in_file, TIFFTAG_RESOLUTIONUNIT, &res_unit);
bits_per_sample = 0;
TIFFGetField(in_file, TIFFTAG_BITSPERSAMPLE, &bits_per_sample);
samples_per_pixel = 0;
@ -409,7 +626,7 @@ static void lenna_tests(int output_width, int output_length_scaling, const char
im.current_row = 0;
im.bytes_per_pixel = samples_per_pixel;
s = image_translate_init(s, T4_IMAGE_TYPE_COLOUR_8BIT, image_width, image_length, T4_IMAGE_TYPE_BILEVEL, output_width, output_length, row_read, &im);
s = image_translate_init(NULL, T4_IMAGE_TYPE_COLOUR_8BIT, image_width, image_length, T4_IMAGE_TYPE_BILEVEL, output_width, output_length, row_read, &im);
output_width = image_translate_get_output_width(s);
output_length = image_translate_get_output_length(s);
@ -445,6 +662,7 @@ static void lenna_tests(int output_width, int output_length_scaling, const char
TIFFWriteEncodedStrip(out_file, 0, image2, output_width*output_length/8);
TIFFWriteDirectory(out_file);
TIFFClose(out_file);
image_translate_free(s);
}
/*- End of function --------------------------------------------------------*/