Struct mozjpeg_sys::jpeg_decompress_struct [−][src]
#[repr(C)]pub struct jpeg_decompress_struct {}Show fields
pub common: jpeg_common_struct, pub src: *mut jpeg_source_mgr, pub image_width: JDIMENSION, pub image_height: JDIMENSION, pub num_components: c_int, pub jpeg_color_space: J_COLOR_SPACE, pub out_color_space: J_COLOR_SPACE, pub scale_num: c_uint, pub scale_denom: c_uint, pub output_gamma: f64, pub buffered_image: boolean, pub raw_data_out: boolean, pub dct_method: J_DCT_METHOD, pub do_fancy_upsampling: boolean, pub do_block_smoothing: boolean, pub quantize_colors: boolean, pub dither_mode: J_DITHER_MODE, pub two_pass_quantize: boolean, pub desired_number_of_colors: c_int, pub enable_1pass_quant: boolean, pub enable_external_quant: boolean, pub enable_2pass_quant: boolean, pub output_width: JDIMENSION, pub output_height: JDIMENSION, pub out_color_components: c_int, pub output_components: c_int, pub rec_outbuf_height: c_int, pub actual_number_of_colors: c_int, pub colormap: JSAMPARRAY_MUT, pub output_scanline: JDIMENSION, pub input_scan_number: c_int, pub input_iMCU_row: JDIMENSION, pub output_scan_number: c_int, pub output_iMCU_row: JDIMENSION, pub coef_bits: *mut c_void, pub quant_tbl_ptrs: [*mut JQUANT_TBL; 4], pub comp_info: *mut jpeg_component_info, pub marker_list: *mut jpeg_marker_struct, pub max_h_samp_factor: c_int, pub max_v_samp_factor: c_int, // some fields omitted
Fields
common: jpeg_common_struct
src: *mut jpeg_source_mgr
image_width: JDIMENSION
Expand description
Basic description of image — filled in by jpeg_read_header()
image_height: JDIMENSION
num_components: c_int
jpeg_color_space: J_COLOR_SPACE
out_color_space: J_COLOR_SPACE
Expand description
Decompression processing parameters — these fields must be set before calling jpeg_start_decompress(). Note that jpeg_read_header() initializes them to default values.
scale_num: c_uint
scale_denom: c_uint
output_gamma: f64
Expand description
image gamma wanted in output
buffered_image: boolean
raw_data_out: boolean
Expand description
TRUE=downsampled data wanted
dct_method: J_DCT_METHOD
do_fancy_upsampling: boolean
do_block_smoothing: boolean
quantize_colors: boolean
dither_mode: J_DITHER_MODE
two_pass_quantize: boolean
desired_number_of_colors: c_int
enable_1pass_quant: boolean
enable_external_quant: boolean
enable_2pass_quant: boolean
output_width: JDIMENSION
Expand description
Description of actual output image that will be returned to application. These fields are computed by jpeg_start_decompress(). You can also use jpeg_calc_output_dimensions() to determine these values in advance of calling jpeg_start_decompress().
output_height: JDIMENSION
out_color_components: c_int
output_components: c_int
rec_outbuf_height: c_int
Expand description
min recommended height of scanline buffer If the buffer passed to jpeg_read_scanlines() is less than this many rows high, space and time will be wasted due to unnecessary data copying. Usually rec_outbuf_height will be 1 or 2, at most 4.
actual_number_of_colors: c_int
colormap: JSAMPARRAY_MUT
output_scanline: JDIMENSION
Expand description
Row index of next scanline to be read from jpeg_read_scanlines(). Application may use this to control its processing loop, e.g., “while (output_scanline < output_height)”.
input_scan_number: c_int
Expand description
Current input scan number and number of iMCU rows completed in scan. These indicate the progress of the decompressor input side.
input_iMCU_row: JDIMENSION
output_scan_number: c_int
output_iMCU_row: JDIMENSION
coef_bits: *mut c_void
Expand description
Current progression status. coef_bits[c][i] indicates the precision with which component c’s DCT coefficient i (in zigzag order) is known. It is -1 when no data has yet been received, otherwise it is the point transform (shift) value for the most recent scan of the coefficient (thus, 0 at completion of the progression). This pointer is NULL when reading a non-progressive file.
quant_tbl_ptrs: [*mut JQUANT_TBL; 4]
Expand description
Internal JPEG parameters — the application usually need not look at these fields. Note that the decompressor output side may not use any parameters that can change between scans.
comp_info: *mut jpeg_component_info
marker_list: *mut jpeg_marker_struct
max_h_samp_factor: c_int
Expand description
These fields are computed during decompression startup
max_v_samp_factor: c_int