121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
/**
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* @file lv_grad.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "lv_grad.h"
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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/**********************
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* STATIC VARIABLES
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**********************/
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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void lv_grad_init_stops(lv_grad_dsc_t * dsc, const lv_color_t colors[], const lv_opa_t opa[],
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const uint8_t fracs[], int num_stops)
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{
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LV_ASSERT(num_stops <= LV_GRADIENT_MAX_STOPS);
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LV_ASSERT(num_stops > 1);
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LV_ASSERT_NULL(dsc);
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LV_ASSERT_NULL(colors);
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dsc->stops_count = num_stops;
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for(int i = 0; i < num_stops; i++) {
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dsc->stops[i].color = colors[i];
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dsc->stops[i].opa = opa != NULL ? opa[i] : LV_OPA_COVER;
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dsc->stops[i].frac = fracs != NULL ? fracs[i] : 255 * i / (num_stops - 1);
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}
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}
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void lv_grad_horizontal_init(lv_grad_dsc_t * dsc)
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{
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LV_ASSERT_NULL(dsc);
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dsc->dir = LV_GRAD_DIR_HOR;
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}
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void lv_grad_vertical_init(lv_grad_dsc_t * dsc)
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{
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LV_ASSERT_NULL(dsc);
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dsc->dir = LV_GRAD_DIR_VER;
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}
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#if LV_USE_DRAW_SW_COMPLEX_GRADIENTS
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void lv_grad_linear_init(lv_grad_dsc_t * dsc, int32_t from_x, int32_t from_y, int32_t to_x, int32_t to_y,
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lv_grad_extend_t extend)
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{
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LV_ASSERT_NULL(dsc);
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dsc->dir = LV_GRAD_DIR_LINEAR;
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dsc->params.linear.start.x = from_x;
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dsc->params.linear.start.y = from_y;
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dsc->params.linear.end.x = to_x;
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dsc->params.linear.end.y = to_y;
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dsc->extend = extend;
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}
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void lv_grad_radial_init(lv_grad_dsc_t * dsc, int32_t center_x, int32_t center_y, int32_t to_x, int32_t to_y,
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lv_grad_extend_t extend)
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{
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LV_ASSERT_NULL(dsc);
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dsc->dir = LV_GRAD_DIR_RADIAL;
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dsc->params.radial.focal.x = center_x;
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dsc->params.radial.focal.y = center_y;
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dsc->params.radial.focal_extent.x = center_x;
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dsc->params.radial.focal_extent.y = center_y;
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dsc->params.radial.end.x = center_x;
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dsc->params.radial.end.y = center_y;
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dsc->params.radial.end_extent.x = to_x;
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dsc->params.radial.end_extent.y = to_y;
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dsc->extend = extend;
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}
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void lv_grad_conical_init(lv_grad_dsc_t * dsc, int32_t center_x, int32_t center_y, int32_t start_angle,
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int32_t end_angle, lv_grad_extend_t extend)
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{
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LV_ASSERT_NULL(dsc);
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dsc->dir = LV_GRAD_DIR_CONICAL;
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dsc->params.conical.center.x = center_x;
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dsc->params.conical.center.y = center_y;
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dsc->params.conical.start_angle = start_angle;
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dsc->params.conical.end_angle = end_angle;
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dsc->extend = extend;
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}
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void lv_grad_radial_set_focal(lv_grad_dsc_t * dsc, int32_t center_x, int32_t center_y, int32_t radius)
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{
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LV_ASSERT_NULL(dsc);
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dsc->params.radial.focal.x = center_x;
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dsc->params.radial.focal.y = center_y;
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dsc->params.radial.focal_extent.x = center_x + radius;
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dsc->params.radial.focal_extent.y = center_y;
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}
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#endif /* LV_USE_DRAW_SW_COMPLEX_GRADIENTS */
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/**********************
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* STATIC FUNCTIONS
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**********************/
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