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Use RenderGeometry for drawing lines at all scales

This commit is contained in:
Sam Lantinga 2022-01-08 10:10:18 -08:00
parent 0696fc0134
commit fe3a33a092
1 changed files with 13 additions and 8 deletions
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21
src/render/SDL_render.c
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@ -2904,13 +2904,13 @@ SDL_RenderDrawLinesF(SDL_Renderer * renderer,
}
#endif
use_rendergeometry = (renderer->QueueDrawLines == NULL);
use_rendergeometry = 1;
if (renderer->scale.x != 1.0f || renderer->scale.y != 1.0f) {
retval = RenderDrawLinesWithRectsF(renderer, points, count);
} else if (use_rendergeometry) {
if (use_rendergeometry) {
SDL_bool isstack1;
SDL_bool isstack2;
const float scale_x = renderer->scale.x;
const float scale_y = renderer->scale.y;
float *xy = SDL_small_alloc(float, 4 * 2 * count, &isstack1);
int *indices = SDL_small_alloc(int,
(4) * 3 * (count - 1)
@ -2939,14 +2939,17 @@ SDL_RenderDrawLinesF(SDL_Renderer * renderer,
for (i = 0; i < count; ++i) {
SDL_FPoint q = points[i]; /* current point */
q.x *= scale_x;
q.y *= scale_y;
*ptr_xy++ = q.x;
*ptr_xy++ = q.y;
*ptr_xy++ = q.x + 1.0f;
*ptr_xy++ = q.x + scale_x;
*ptr_xy++ = q.y;
*ptr_xy++ = q.x + 1.0f;
*ptr_xy++ = q.y + 1.0f;
*ptr_xy++ = q.x + scale_x;
*ptr_xy++ = q.y + scale_y;
*ptr_xy++ = q.x;
*ptr_xy++ = q.y + 1.0f;
*ptr_xy++ = q.y + scale_y;
#define ADD_TRIANGLE(i1, i2, i3) \
*ptr_indices++ = cur_indice + i1; \
@ -3025,6 +3028,8 @@ SDL_RenderDrawLinesF(SDL_Renderer * renderer,
SDL_small_free(indices, isstack2);
}
} else if (renderer->scale.x != 1.0f || renderer->scale.y != 1.0f) {
retval = RenderDrawLinesWithRectsF(renderer, points, count);
} else {
retval = QueueCmdDrawLines(renderer, points, count);
}