diff options
Diffstat (limited to 'buffer.c')
| -rw-r--r-- | buffer.c | 11 |
1 files changed, 10 insertions, 1 deletions
@@ -1937,6 +1937,15 @@ void buffer_check_valid(TextBuffer *buffer) { } #endif +u32 buffer_first_rendered_line(TextBuffer *buffer) { + return (u32)buffer->scroll_y; +} + +u32 buffer_last_rendered_line(TextBuffer *buffer) { + u32 line = buffer_first_rendered_line(buffer) + (u32)buffer_display_lines(buffer) + 1; + return clamp_u32(line, 0, buffer->nlines); +} + // Render the text buffer in the given rectangle void buffer_render(TextBuffer *buffer, Rect r) { float x1, y1, x2, y2; @@ -1956,7 +1965,7 @@ void buffer_render(TextBuffer *buffer, Rect r) { float const padding = settings->padding; float const border_thickness = settings->border_thickness; - u32 start_line = (u32)buffer->scroll_y; // line to start rendering from + u32 start_line = buffer_first_rendered_line(buffer); // line to start rendering from Rect bounding_box = rect4(x1, y1, x2, y2); float render_start_y = y1 - (float)(buffer->scroll_y - start_line) * char_height; // where the 1st line is rendered |