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scissor command

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This commit is contained in:
Alessandro Mauri 2024-12-15 22:29:07 +01:00
parent 6d8300f9d9
commit bca29c537c
6 changed files with 83 additions and 63 deletions
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22
src/ugui_cmd.c3
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@ -7,6 +7,7 @@ enum CmdType {
CMD_RECT,
CMD_UPDATE_ATLAS,
CMD_SPRITE,
CMD_SCISSOR,
}
// command to draw a rect
@ -16,7 +17,6 @@ struct CmdRect {
Color color;
}
// FIXME: For now only support black and white atlas, so PIXELFORMAT_UNCOMPRESSED_GRAYSCALE
struct CmdUpdateAtlas {
Id id;
char* raw_buffer;
@ -31,6 +31,11 @@ struct CmdSprite {
Rect texture_rect;
}
// if rect is zero Rect{0} then reset the scissor
struct CmdScissor {
Rect rect;
}
// command structure
struct Cmd {
CmdType type;
@ -38,6 +43,7 @@ struct Cmd {
CmdRect rect;
CmdUpdateAtlas update_atlas;
CmdSprite sprite;
CmdScissor scissor;
}
}
@ -96,6 +102,8 @@ fn void! Ctx.push_string(&ctx, Rect bounds, String text)
return;
}
ctx.push_scissor(bounds)!;
short baseline = (short)ctx.font.ascender;
short line_height = (short)ctx.font.ascender - (short)ctx.font.descender;
short line_gap = (short)ctx.font.linegap;
@ -135,6 +143,9 @@ fn void! Ctx.push_string(&ctx, Rect bounds, String text)
continue;
}
}
// FIXME: we never get here if an error was thrown before
ctx.push_scissor(Rect{})!;
}
fn void! Ctx.push_update_atlas(&ctx, Atlas* atlas)
@ -150,4 +161,13 @@ fn void! Ctx.push_update_atlas(&ctx, Atlas* atlas)
},
};
ctx.cmd_queue.enqueue(&up)!;
}
fn void! Ctx.push_scissor(&ctx, Rect rect)
{
Cmd sc = {
.type = CMD_SCISSOR,
.scissor.rect = rect,
};
ctx.cmd_queue.enqueue(&sc)!;
}