Transition to hekate bdk layout
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shchmue
parent
4425e81085
commit
4ffd4ce7f0
317 changed files with 60891 additions and 1003 deletions
163
bdk/libs/lvgl/lv_draw/lv_draw.c
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163
bdk/libs/lvgl/lv_draw/lv_draw.c
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/**
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* @file lv_draw.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 <stdio.h>
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#include "lv_draw.h"
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#include "lv_draw_rbasic.h"
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#include "lv_draw_vbasic.h"
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#include "../lv_misc/lv_fs.h"
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#include "../lv_misc/lv_math.h"
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#include "../lv_misc/lv_ufs.h"
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#include "../lv_objx/lv_img.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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#if LV_VDB_SIZE != 0
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void (*const px_fp)(lv_coord_t x, lv_coord_t y, const lv_area_t * mask, lv_color_t color, lv_opa_t opa) = lv_vpx;
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void (*const fill_fp)(const lv_area_t * coords, const lv_area_t * mask, lv_color_t color, lv_opa_t opa) = lv_vfill;
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void (*const letter_fp)(const lv_point_t * pos_p, const lv_area_t * mask, const lv_font_t * font_p, uint32_t letter, lv_color_t color, lv_opa_t opa) = lv_vletter;
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void (*const map_fp)(const lv_area_t * cords_p, const lv_area_t * mask_p,
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const uint8_t * map_p, lv_opa_t opa, bool chroma_key, bool alpha_byte,
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lv_color_t recolor, lv_opa_t recolor_opa) = lv_vmap;
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#else
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void (*const px_fp)(lv_coord_t x, lv_coord_t y, const lv_area_t * mask, lv_color_t color, lv_opa_t opa) = lv_rpx;
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void (*const fill_fp)(const lv_area_t * coords, const lv_area_t * mask, lv_color_t color, lv_opa_t opa) = lv_rfill;
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void (*const letter_fp)(const lv_point_t * pos_p, const lv_area_t * mask, const lv_font_t * font_p, uint32_t letter, lv_color_t color, lv_opa_t opa) = lv_rletter;
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void (*const map_fp)(const lv_area_t * cords_p, const lv_area_t * mask_p,
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const uint8_t * map_p, lv_opa_t opa, bool chroma_key, bool alpha_byte,
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lv_color_t recolor, lv_opa_t recolor_opa) = lv_rmap;
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#endif
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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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/**********************
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* STATIC FUNCTIONS
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**********************/
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#if LV_ANTIALIAS != 0
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/**
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* Get the opacity of a pixel based it's position in a line segment
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* @param seg segment length
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* @param px_id position of of a pixel which opacity should be get [0..seg-1]
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* @param base_opa the base opacity
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* @return the opacity of the given pixel
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*/
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lv_opa_t lv_draw_aa_get_opa(lv_coord_t seg, lv_coord_t px_id, lv_opa_t base_opa)
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{
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/* How to calculate the opacity of pixels on the edges which makes the anti-aliasing?
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* For example we have a line like this (y = -0.5 * x):
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*
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* | _ _
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* * * |
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*
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* Anti-aliased pixels come to the '*' characters
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* Calculate what percentage of the pixels should be covered if real line (not rasterized) would be drawn:
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* 1. A real line should start on (0;0) and end on (2;1)
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* 2. So the line intersection coordinates on the first pixel: (0;0) (1;0.5) -> 25% covered pixel in average
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* 3. For the second pixel: (1;0.5) (2;1) -> 75% covered pixel in average
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* 4. The equation: (px_id * 2 + 1) / (segment_width * 2)
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* segment_width: the line segment which is being anti-aliased (was 2 in the example)
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* px_id: pixel ID from 0 to (segment_width - 1)
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* result: [0..1] coverage of the pixel
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*/
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/*Accelerate the common segment sizes to avoid division*/
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static const lv_opa_t seg1[1] = {128};
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static const lv_opa_t seg2[2] = {64, 192};
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static const lv_opa_t seg3[3] = {42, 128, 212};
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static const lv_opa_t seg4[4] = {32, 96, 159, 223};
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static const lv_opa_t seg5[5] = {26, 76, 128, 178, 230};
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static const lv_opa_t seg6[6] = {21, 64, 106, 148, 191, 234};
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static const lv_opa_t seg7[7] = {18, 55, 91, 128, 164, 200, 237};
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static const lv_opa_t seg8[8] = {16, 48, 80, 112, 143, 175, 207, 239};
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static const lv_opa_t * seg_map[] = {seg1, seg2, seg3, seg4,
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seg5, seg6, seg7, seg8
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};
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if(seg == 0) return LV_OPA_TRANSP;
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else if(seg < 8) return (uint32_t)((uint32_t)seg_map[seg - 1][px_id] * base_opa) >> 8;
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else {
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return ((px_id * 2 + 1) * base_opa) / (2 * seg);
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}
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}
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/**
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* Add a vertical anti-aliasing segment (pixels with decreasing opacity)
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* @param x start point x coordinate
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* @param y start point y coordinate
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* @param length length of segment (negative value to start from 0 opacity)
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* @param mask draw only in this area
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* @param color color of pixels
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* @param opa maximum opacity
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*/
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void lv_draw_aa_ver_seg(lv_coord_t x, lv_coord_t y, lv_coord_t length, const lv_area_t * mask, lv_color_t color, lv_opa_t opa)
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{
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bool aa_inv = false;
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if(length < 0) {
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aa_inv = true;
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length = -length;
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}
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lv_coord_t i;
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for(i = 0; i < length; i++) {
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lv_opa_t px_opa = lv_draw_aa_get_opa(length, i, opa);
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if(aa_inv) px_opa = opa - px_opa;
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px_fp(x, y + i, mask, color, px_opa);
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}
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}
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/**
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* Add a horizontal anti-aliasing segment (pixels with decreasing opacity)
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* @param x start point x coordinate
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* @param y start point y coordinate
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* @param length length of segment (negative value to start from 0 opacity)
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* @param mask draw only in this area
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* @param color color of pixels
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* @param opa maximum opacity
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*/
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void lv_draw_aa_hor_seg(lv_coord_t x, lv_coord_t y, lv_coord_t length, const lv_area_t * mask, lv_color_t color, lv_opa_t opa)
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{
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bool aa_inv = false;
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if(length < 0) {
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aa_inv = true;
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length = -length;
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}
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lv_coord_t i;
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for(i = 0; i < length; i++) {
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lv_opa_t px_opa = lv_draw_aa_get_opa(length, i, opa);
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if(aa_inv) px_opa = opa - px_opa;
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px_fp(x + i, y, mask, color, px_opa);
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}
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}
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#endif
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