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Add SDL Pinch events (#9445)

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This commit is contained in:
Sylvain Becker
2025-10-12 23:44:23 +02:00
committed by GitHub
parent e2195621d7
commit 71bf56c9e4
21 changed files with 605 additions and 13 deletions
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22
test/testgeometry.c
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@@ -30,6 +30,7 @@ static SDL_BlendMode blendMode = SDL_BLENDMODE_NONE;
static float angle = 0.0f;
static int translate_cx = 0;
static int translate_cy = 0;
static float pinch_scale = 1.0f;
static int done;
@@ -103,11 +104,14 @@ static void loop(void)
} else if (event.key.key == SDLK_DOWN) {
translate_cy += 1;
} else {
SDLTest_CommonEvent(state, &event, &done);
}
} else {
SDLTest_CommonEvent(state, &event, &done);
} else if (event.type == SDL_EVENT_PINCH_BEGIN) {
} else if (event.type == SDL_EVENT_PINCH_UPDATE) {
pinch_scale *= event.pinch.scale;
} else if (event.type == SDL_EVENT_PINCH_END) {
}
SDLTest_CommonEvent(state, &event, &done);
}
for (i = 0; i < state->num_windows; ++i) {
@@ -136,24 +140,24 @@ static void loop(void)
cy += translate_cy;
a = (angle * SDL_PI_F) / 180.0f;
verts[0].position.x = cx + d * SDL_cosf(a);
verts[0].position.y = cy + d * SDL_sinf(a);
verts[0].position.x = cx + (d * SDL_cosf(a)) * pinch_scale;
verts[0].position.y = cy + (d * SDL_sinf(a)) * pinch_scale;
verts[0].color.r = 1.0f;
verts[0].color.g = 0;
verts[0].color.b = 0;
verts[0].color.a = 1.0f;
a = ((angle + 120) * SDL_PI_F) / 180.0f;
verts[1].position.x = cx + d * SDL_cosf(a);
verts[1].position.y = cy + d * SDL_sinf(a);
verts[1].position.x = cx + (d * SDL_cosf(a)) * pinch_scale;
verts[1].position.y = cy + (d * SDL_sinf(a)) * pinch_scale;
verts[1].color.r = 0;
verts[1].color.g = 1.0f;
verts[1].color.b = 0;
verts[1].color.a = 1.0f;
a = ((angle + 240) * SDL_PI_F) / 180.0f;
verts[2].position.x = cx + d * SDL_cosf(a);
verts[2].position.y = cy + d * SDL_sinf(a);
verts[2].position.x = cx + (d * SDL_cosf(a)) * pinch_scale;
verts[2].position.y = cy + (d * SDL_sinf(a)) * pinch_scale;
verts[2].color.r = 0;
verts[2].color.g = 0;
verts[2].color.b = 1.0f;