internal static jpeg_component_info[] createArrayOfComponents(int length)
{
if (length < 0)
{
throw new ArgumentOutOfRangeException("length");
}
jpeg_component_info[] result = new jpeg_component_info[length];
for (int i = 0; i < result.Length; ++i)
{
result[i] = new jpeg_component_info();
}
return(result);
}
internal void Assign(jpeg_component_info ci)
{
component_id = ci.component_id;
component_index = ci.component_index;
h_samp_factor = ci.h_samp_factor;
v_samp_factor = ci.v_samp_factor;
quant_tbl_no = ci.quant_tbl_no;
dc_tbl_no = ci.dc_tbl_no;
ac_tbl_no = ci.ac_tbl_no;
width_in_blocks = ci.width_in_blocks;
height_in_blocks = ci.height_in_blocks;
DCT_scaled_size = ci.DCT_scaled_size;
downsampled_width = ci.downsampled_width;
downsampled_height = ci.downsampled_height;
component_needed = ci.component_needed;
MCU_width = ci.MCU_width;
MCU_height = ci.MCU_height;
MCU_blocks = ci.MCU_blocks;
MCU_sample_width = ci.MCU_sample_width;
last_col_width = ci.last_col_width;
last_row_height = ci.last_row_height;
quant_table = ci.quant_table;
}
internal void Assign(jpeg_component_info ci)
{
component_id = ci.component_id;
component_index = ci.component_index;
h_samp_factor = ci.h_samp_factor;
v_samp_factor = ci.v_samp_factor;
quant_tbl_no = ci.quant_tbl_no;
dc_tbl_no = ci.dc_tbl_no;
ac_tbl_no = ci.ac_tbl_no;
width_in_blocks = ci.width_in_blocks;
height_in_blocks = ci.height_in_blocks;
DCT_h_scaled_size = ci.DCT_h_scaled_size;
DCT_v_scaled_size = ci.DCT_v_scaled_size;
downsampled_width = ci.downsampled_width;
downsampled_height = ci.downsampled_height;
component_needed = ci.component_needed;
MCU_width = ci.MCU_width;
MCU_height = ci.MCU_height;
MCU_blocks = ci.MCU_blocks;
MCU_sample_width = ci.MCU_sample_width;
last_col_width = ci.last_col_width;
last_row_height = ci.last_row_height;
quant_table = ci.quant_table;
}
internal static jpeg_component_info[] createArrayOfComponents(int length)
{
if (length < 0)
throw new ArgumentOutOfRangeException("length");
jpeg_component_info[] result = new jpeg_component_info[length];
for (int i = 0; i < result.Length; ++i)
result[i] = new jpeg_component_info();
return result;
}
/*
* Allocate downsampled-data buffers needed for downsampled I/O.
* We use values computed in jpeg_start_compress or jpeg_start_decompress.
* We use LibJpeg.Net's allocator so that buffers will be released automatically
* when done with strip/tile.
* This is also a handy place to compute samplesperclump, bytesperline.
*/
private bool alloc_downsampled_buffers(jpeg_component_info[] comp_info, int num_components)
{
int samples_per_clump = 0;
for (int ci = 0; ci < num_components; ci++)
{
jpeg_component_info compptr = comp_info[ci];
samples_per_clump += compptr.H_samp_factor * compptr.V_samp_factor;
byte[][] buf = TIFFjpeg_alloc_sarray(
compptr.Width_in_blocks * JpegConstants.DCTSIZE,
compptr.V_samp_factor * JpegConstants.DCTSIZE);
m_ds_buffer[ci] = buf;
}
m_samplesperclump = samples_per_clump;
return true;
}
