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genesys: Simplify shading computation by using enum for color order

merge-requests/129/head
Povilas Kanapickas 2019-08-17 10:53:56 +03:00
rodzic 3a1163480a
commit 503797c248
2 zmienionych plików z 36 dodań i 22 usunięć
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52
backend/genesys.cc
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@ -65,6 +65,7 @@
#include "../include/sane/sanei_config.h"
#include "../include/sane/sanei_magic.h"
#include <array>
#include <cstdio>
#include <cstring>
#include <fstream>
@ -2199,6 +2200,16 @@ compute_averaged_planar (Genesys_Device * dev, const Genesys_Sensor& sensor,
}
}
static std::array<unsigned, 3> color_order_to_cmat(ColorOrder color_order)
{
switch (color_order) {
case ColorOrder::RGB: return {0, 1, 2};
case ColorOrder::GBR: return {2, 0, 1};
default:
throw std::logic_error("Unknown color order");
}
}
/**
* Computes shading coefficient using formula in data sheet. 16bit data values
* manipulated here are little endian. For now we assume deletion scanning type
@ -2212,12 +2223,11 @@ compute_averaged_planar (Genesys_Device * dev, const Genesys_Sensor& sensor,
* @param coeff 4000h or 2000h depending on fast scan mode or not
* @param target value of the target code
*/
static void
compute_coefficients (Genesys_Device * dev,
static void compute_coefficients(Genesys_Device * dev,
uint8_t * shading_data,
unsigned int pixels_per_line,
unsigned int channels,
unsigned int cmat[3],
ColorOrder color_order,
int offset,
unsigned int coeff,
unsigned int target)
@ -2229,6 +2239,8 @@ compute_coefficients (Genesys_Device * dev,
DBG(DBG_io, "%s: pixels_per_line=%d, coeff=0x%04x\n", __func__, pixels_per_line, coeff);
auto cmat = color_order_to_cmat(color_order);
/* compute start & end values depending of the offset */
if (offset < 0)
{
@ -2283,14 +2295,13 @@ compute_coefficients (Genesys_Device * dev,
* @param coeff 4000h or 2000h depending on fast scan mode or not
* @param target white target value
*/
static void
compute_planar_coefficients (Genesys_Device * dev,
static void compute_planar_coefficients(Genesys_Device * dev,
uint8_t * shading_data,
unsigned int factor,
unsigned int pixels_per_line,
unsigned int words_per_color,
unsigned int channels,
unsigned int cmat[3],
ColorOrder color_order,
unsigned int offset,
unsigned int coeff,
unsigned int target)
@ -2299,6 +2310,8 @@ compute_planar_coefficients (Genesys_Device * dev,
uint32_t x, c, i;
uint32_t val, dk, br;
auto cmat = color_order_to_cmat(color_order);
DBG(DBG_io, "%s: factor=%d, pixels_per_line=%d, words=0x%X, coeff=0x%04x\n", __func__, factor,
pixels_per_line, words_per_color, coeff);
for (c = 0; c < channels; c++)
@ -2353,7 +2366,7 @@ compute_shifted_coefficients (Genesys_Device * dev,
uint8_t * shading_data,
unsigned int pixels_per_line,
unsigned int channels,
unsigned int cmat[3],
ColorOrder color_order,
int offset,
unsigned int coeff,
unsigned int target_dark,
@ -2365,6 +2378,8 @@ compute_shifted_coefficients (Genesys_Device * dev,
uint8_t *ptr = shading_data + offset * 3 * 4; /* contain 16bit words in little endian */
unsigned int patch_cnt = offset * 3; /* at start, offset of first patch */
auto cmat = color_order_to_cmat(color_order);
x = dev->settings.xres;
if (sensor.get_ccd_size_divisor_for_dpi(dev->settings.xres) > 1)
x *= 2; /* scanner is using half-ccd mode */
@ -2445,7 +2460,6 @@ static void genesys_send_shading_coefficient(Genesys_Device* dev, const Genesys_
int o;
unsigned int length; /**> number of shading calibration data words */
unsigned int factor;
unsigned int cmat[3]; /**> matrix of color channels */
unsigned int coeff, target_code, words_per_color = 0;
pixels_per_line = dev->calib_pixels + dev->calib_pixels_offset;
@ -2519,9 +2533,6 @@ static void genesys_send_shading_coefficient(Genesys_Device* dev, const Genesys_
/* TODO setup a struct in genesys_devices that
* will handle these settings instead of having this switch growing up */
cmat[0] = 0;
cmat[1] = 1;
cmat[2] = 2;
switch (dev->model->ccd_type)
{
case CCD_XP300:
@ -2537,7 +2548,7 @@ static void genesys_send_shading_coefficient(Genesys_Device* dev, const Genesys_
pixels_per_line,
words_per_color,
channels,
cmat,
ColorOrder::RGB,
o,
coeff,
target_code);
@ -2545,16 +2556,13 @@ static void genesys_send_shading_coefficient(Genesys_Device* dev, const Genesys_
case CIS_XP200:
target_code = 0xdc00;
o = 2;
cmat[0] = 2; /* red is last */
cmat[1] = 0; /* green is first */
cmat[2] = 1; /* blue is second */
compute_planar_coefficients (dev,
shading_data.data(),
1,
pixels_per_line,
words_per_color,
channels,
cmat,
ColorOrder::GBR,
o,
coeff,
target_code);
@ -2570,7 +2578,7 @@ static void genesys_send_shading_coefficient(Genesys_Device* dev, const Genesys_
shading_data.data(),
pixels_per_line,
3,
cmat,
ColorOrder::RGB,
o,
coeff,
target_code);
@ -2586,7 +2594,7 @@ static void genesys_send_shading_coefficient(Genesys_Device* dev, const Genesys_
shading_data.data(),
pixels_per_line,
3,
cmat,
ColorOrder::RGB,
o,
coeff,
target_code);
@ -2613,7 +2621,7 @@ static void genesys_send_shading_coefficient(Genesys_Device* dev, const Genesys_
shading_data.data(),
pixels_per_line,
3,
cmat,
ColorOrder::RGB,
o,
coeff,
target_code);
@ -2630,7 +2638,7 @@ static void genesys_send_shading_coefficient(Genesys_Device* dev, const Genesys_
shading_data.data(),
pixels_per_line,
3,
cmat,
ColorOrder::RGB,
o,
coeff,
target_code);
@ -2668,7 +2676,7 @@ static void genesys_send_shading_coefficient(Genesys_Device* dev, const Genesys_
pixels_per_line,
words_per_color,
channels,
cmat,
ColorOrder::RGB,
0,
coeff,
target_code);
@ -2700,7 +2708,7 @@ static void genesys_send_shading_coefficient(Genesys_Device* dev, const Genesys_
shading_data.data(),
pixels_per_line,
channels,
cmat,
ColorOrder::RGB,
12, /* offset */
coeff,
0x0001, /* target_dark */

6
backend/genesys_enums.h
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@ -116,6 +116,12 @@ enum Genesys_Color_Order
COLOR_ORDER_BGR
};
enum class ColorOrder
{
RGB,
GBR,
};
enum Genesys_Model_Type
{
MODEL_UMAX_ASTRA_4500 = 0,