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updated sdl2 to use sdl2_gfx

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herbglitch 2025-02-11 00:57:39 -07:00
parent 66ff7877cb
commit 8166d3fa39
4 changed files with 26 additions and 41 deletions
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45
packages/graphics/sdl/circle.c
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@ -1,49 +1,12 @@
#include "arc/graphics/circle.h"
#include "renderer.h"
#include <stdlib.h>
#include <SDL2_gfxPrimitives.h>
//Modified from https://stackoverflow.com/questions/38334081/how-to-draw-circles-arcs-and-vector-graphics-in-sdl
void ARC_Circle_Render(ARC_Circle *circle, ARC_Renderer *renderer, ARC_Color *color){
SDL_SetRenderDrawColor((SDL_Renderer *)renderer, color->r, color->g, color->b, color->a);
int32_t diameter = (circle->r * 2);
int32_t x = (circle->r - 1);
int32_t y = 0;
int32_t tx = 1;
int32_t ty = 1;
int32_t error = (tx - diameter);
while(x >= y){
// Each of the following renders an octant of the circle
SDL_RenderDrawPoint((SDL_Renderer *)renderer, circle->x + x, circle->y - y);
SDL_RenderDrawPoint((SDL_Renderer *)renderer, circle->x + x, circle->y + y);
SDL_RenderDrawPoint((SDL_Renderer *)renderer, circle->x - x, circle->y - y);
SDL_RenderDrawPoint((SDL_Renderer *)renderer, circle->x - x, circle->y + y);
SDL_RenderDrawPoint((SDL_Renderer *)renderer, circle->x + y, circle->y - x);
SDL_RenderDrawPoint((SDL_Renderer *)renderer, circle->x + y, circle->y + x);
SDL_RenderDrawPoint((SDL_Renderer *)renderer, circle->x - y, circle->y - x);
SDL_RenderDrawPoint((SDL_Renderer *)renderer, circle->x - y, circle->y + x);
if(error <= 0){
++y;
error += ty;
ty += 2;
}
if(error > 0){
--x;
tx += 2;
error += (tx - diameter);
}
}
circleRGBA((SDL_Renderer *)renderer, (Sint16)circle->x, (Sint16)circle->y, (Sint16)circle->r, (Uint8)color->r, (Uint8)color->g, (Uint8)color->b, (Uint8)color->a);
}
//TODO: very temp
void ARC_Circle_RenderFill(ARC_Circle *circle, ARC_Renderer *renderer, ARC_Color *color){
ARC_Circle temp = *circle;
for(; temp.r; temp.r--){
ARC_Circle_Render(&temp, renderer, color);
}
}
filledCircleRGBA((SDL_Renderer *)renderer, (Sint16)circle->x, (Sint16)circle->y, (Sint16)circle->r, (Uint8)color->r, (Uint8)color->g, (Uint8)color->b, (Uint8)color->a);
}