Commit 3da7c6305ac0c6fe6289f29d92fd993a4ca9a653
2022-01-08T11:07:03
Assert that we have drawn the expected number of points
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diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c
index dcef14a..299af22 100644
--- a/src/render/SDL_render.c
+++ b/src/render/SDL_render.c
@@ -2789,7 +2789,7 @@ static int plotLineLow(SDL_Renderer *renderer, float x0, float y0, float x1, flo
float dy = y1 - y0;
int yi = 1;
float x, y, D;
- int count = (x1 - x0 + 1);
+ int count = (int)SDL_ceilf(x1 - x0 + 1);
SDL_bool isstack;
SDL_FPoint *points = SDL_small_alloc(SDL_FPoint, count, &isstack);
SDL_FPoint *tmp = points;
@@ -2812,6 +2812,7 @@ static int plotLineLow(SDL_Renderer *renderer, float x0, float y0, float x1, flo
D += 2*dy;
}
}
+ SDL_assert((tmp - points) == count);
if (renderer->scale.x != 1.0f || renderer->scale.y != 1.0f) {
retval = RenderDrawPointsWithRectsF(renderer, points, count);
@@ -2831,7 +2832,7 @@ static int plotLineHigh(SDL_Renderer *renderer, float x0, float y0, float x1, fl
float dy = y1 - y0;
int xi = 1;
float x, y, D;
- int count = (y1 - y0 + 1);
+ int count = (int)SDL_ceilf(y1 - y0 + 1);
SDL_bool isstack;
SDL_FPoint *points = SDL_small_alloc(SDL_FPoint, count, &isstack);
SDL_FPoint *tmp = points;
@@ -2854,6 +2855,7 @@ static int plotLineHigh(SDL_Renderer *renderer, float x0, float y0, float x1, fl
D += 2*dx;
}
}
+ SDL_assert((tmp - points) == count);
if (renderer->scale.x != 1.0f || renderer->scale.y != 1.0f) {
retval = RenderDrawPointsWithRectsF(renderer, points, count);