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use optimized triangle drawing if no opacity

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This commit is contained in:
Gabor Kiss-Vamosi 2019-05-31 07:51:18 +02:00
parent 7884636b7c
commit cf124e60ad
1 changed files with 27 additions and 29 deletions
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56
src/lv_draw/lv_draw_triangle.c
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@ -12,13 +12,7 @@
/*********************
* DEFINES
*********************/
/* Draw the tall rectangles from vertical lines
* and from the flat triangles from horizontal lines
* to minimize the number of lines.
* It's still not perfect because some pixels on the edges are overdrawn.
* (Looks fine LV_OPA_COVER)
*/
#define FLAT_TALL_OPTIMIZED 0
/**********************
* TYPEDEFS
**********************/
@ -26,15 +20,14 @@
/**********************
* STATIC PROTOTYPES
**********************/
void tri_draw_flat(const lv_point_t * points, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa);
void tri_draw_tall(const lv_point_t * points, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa);
static void point_swap(lv_point_t * p1, lv_point_t * p2);
/**********************
* STATIC VARIABLES
**********************/
#if FLAT_TALL_OPTIMIZED
void tri_draw_flat(const lv_point_t * points, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa);
#endif
void tri_draw_tall(const lv_point_t * points, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa);
static void point_swap(lv_point_t * p1, lv_point_t * p2);
static uint8_t corr_value;
/**********************
* MACROS
@ -54,8 +47,6 @@ static void point_swap(lv_point_t * p1, lv_point_t * p2);
void lv_draw_triangle(const lv_point_t * points, const lv_area_t * mask, const lv_style_t * style,
lv_opa_t opa_scale)
{
opa_scale = LV_OPA_50;
/*Return is the triangle is degenerated*/
if(points[0].x == points[1].x && points[0].y == points[1].y) return;
if(points[1].x == points[2].x && points[1].y == points[2].y) return;
@ -68,32 +59,40 @@ void lv_draw_triangle(const lv_point_t * points, const lv_area_t * mask, const l
? style->body.opa
: (uint16_t)((uint16_t)style->body.opa * opa_scale) >> 8;
#if FLAT_TALL_OPTIMIZED == 0
tri_draw_tall(points, mask, style, opa);
#else
/*Is the triangle flat or tall?*/
lv_coord_t x_min = LV_MATH_MIN(LV_MATH_MIN(points[0].x, points[1].x), points[2].x);
lv_coord_t x_max = LV_MATH_MAX(LV_MATH_MAX(points[0].x, points[1].x), points[2].x);
lv_coord_t y_min = LV_MATH_MIN(LV_MATH_MIN(points[0].y, points[1].y), points[2].y);
lv_coord_t y_max = LV_MATH_MAX(LV_MATH_MAX(points[0].y, points[1].y), points[2].y);
/* If smaller in x then it's tall.
* Draw from horizontal lines*/
if(x_max - x_min < y_max - y_min) {
if(opa < LV_OPA_MAX) {
/*Simply draw the triangles with opacity */
corr_value = 1;
tri_draw_tall(points, mask, style, opa);
} else {
/* Draw the tall rectangles from vertical lines
* and from the flat triangles from horizontal lines
* to minimize the number of lines.
* Some pixels are overdrawn on the common edges of the triangles
* so use it only if the triangle has no opacity*/
corr_value = 0;
/* Draw from horizontal lines*/
if(x_max - x_min < y_max - y_min) {
tri_draw_tall(points, mask, style, opa);
}
/*Else flat so draw from vertical lines*/
else {
tri_draw_flat(points, mask, style, opa);
}
}
/*Else flat so draw from vertical lines*/
else {
tri_draw_flat(points, mask, style, opa);
}
#endif
}
/**********************
* STATIC FUNCTIONS
**********************/
#if FLAT_TALL_OPTIMIZED
void tri_draw_flat(const lv_point_t * points, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa)
{
/*Return if the points are out of the mask*/
@ -166,7 +165,7 @@ void tri_draw_flat(const lv_point_t * points, const lv_area_t * mask, const lv_s
/* Get the area of a line.
* Adjust it a little bit to perfectly match (no redrawn pixels) with the adjacent triangles*/
draw_area.x1 = LV_MATH_MIN(act_area.x1, act_area.x2);
draw_area.x2 = LV_MATH_MAX(act_area.x1, act_area.x2) - (FLAT_TALL_OPTIMIZED == 0 ? 1 : 0);
draw_area.x2 = LV_MATH_MAX(act_area.x1, act_area.x2) - corr_value;
draw_area.y1 = LV_MATH_MIN(act_area.y1, act_area.y2);
draw_area.y2 = LV_MATH_MAX(act_area.y1, act_area.y2);
@ -212,7 +211,6 @@ void tri_draw_flat(const lv_point_t * points, const lv_area_t * mask, const lv_s
} while(edge2.y == y2_tmp);
}
}
#endif
void tri_draw_tall(const lv_point_t * points, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa)
{
@ -271,7 +269,7 @@ void tri_draw_tall(const lv_point_t * points, const lv_area_t * mask, const lv_s
draw_area.x1 = LV_MATH_MIN(act_area.x1, act_area.x2);
draw_area.x2 = LV_MATH_MAX(act_area.x1, act_area.x2);
draw_area.y1 = LV_MATH_MIN(act_area.y1, act_area.y2);
draw_area.y2 = LV_MATH_MAX(act_area.y1, act_area.y2) - (FLAT_TALL_OPTIMIZED == 0 ? 1 : 0);
draw_area.y2 = LV_MATH_MAX(act_area.y1, act_area.y2) - corr_value;
lv_draw_fill(&draw_area, mask, style->body.main_color, opa);