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Keep parent scissor setting

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Combine parent scissor setting to the current nuklear child.
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jason 2019-10-11 14:11:56 +08:00 • committed by GitHub
parent bf89bf9f08
commit 81fc2cc7ba
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 29 additions and 5 deletions
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34
src/nuklear_love.c
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@ -600,11 +600,11 @@ static void nk_love_getGraphics(float *line_thickness, struct nk_color *color)
lua_pop(L, 6);
}
static void nk_love_scissor(int x, int y, int w, int h)
static void nk_love_scissor(int x, int y, int w, int h, int *px, int *py, int *pw, int *ph)
{
lua_getglobal(L, "love");
lua_getfield(L, -1, "graphics");
lua_getfield(L, -1, "setScissor");
lua_getfield(L, -1, "setScissor");
int x1 = x, y1 = y, x2 = x + w, y2 = y, x3 = x, y3 = y + h, x4 = x + w, y4 = y + h;
nk_love_transform(context->T, &x1, &y1);
nk_love_transform(context->T, &x2, &y2);
@ -614,10 +614,16 @@ static void nk_love_scissor(int x, int y, int w, int h)
int top = NK_MIN(NK_MIN(y1, y2), NK_MIN(y3, y4));
int right = NK_MAX(NK_MAX(x1, x2), NK_MAX(x3, x4));
int bottom = NK_MAX(NK_MAX(y1, y2), NK_MAX(y3, y4));
if (px) {
left = NK_MAX(left, *px);
top = NK_MAX(top, *py);
right = NK_MIN(right, *px + *pw);
bottom = NK_MIN(bottom, *py + *ph);
}
lua_pushnumber(L, left);
lua_pushnumber(L, top);
lua_pushnumber(L, right - left);
lua_pushnumber(L, bottom - top);
lua_pushnumber(L, NK_MAX(0, right - left));
lua_pushnumber(L, NK_MAX(0, bottom - top));
lua_call(L, 4, 0);
lua_pop(L, 2);
}
@ -1230,6 +1236,19 @@ static int nk_love_draw(lua_State *L)
lua_getglobal(L, "love");
lua_getfield(L, -1, "graphics");
int x = 0, y = 0, w = 0, h = 0;
char scissor_enabled = 0;
lua_getfield(L, -1, "getScissor");
lua_call(L, 0, 4);
if (!lua_isnil(L, -4)) {
x = lua_tonumber(L, -4);
y = lua_tonumber(L, -3);
w = lua_tonumber(L, -2);
h = lua_tonumber(L, -1);
scissor_enabled = 1;
}
lua_pop(L, 4);
lua_getfield(L, -1, "push");
lua_pushstring(L, "all");
lua_call(L, 1, 0);
@ -1259,7 +1278,12 @@ static int nk_love_draw(lua_State *L)
case NK_COMMAND_NOP: break;
case NK_COMMAND_SCISSOR: {
const struct nk_command_scissor *s =(const struct nk_command_scissor*)cmd;
nk_love_scissor(s->x, s->y, s->w, s->h);
if (scissor_enabled)
{
nk_love_scissor(s->x, s->y, s->w, s->h, &x, &y, &w, &h);
} else {
nk_love_scissor(s->x, s->y, s->w, s->h, NULL, NULL, NULL, NULL);
}
} break;
case NK_COMMAND_LINE: {
const struct nk_command_line *l = (const struct nk_command_line *)cmd;