Avoid drawing hidden text in `DocView:draw_line_text` (#1298)
* Stop drawing text past the `DocView` edge in `DocView:draw_line_text` * Don't add draw commands if they fall outside the latest clip The check was previously done with the window rect, so this will reduce a bit more the number of commands sent.
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@ -422,6 +422,7 @@ function DocView:draw_line_text(line, x, y)
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-- do not render newline, fixes issue #1164
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if tidx == last_token then text = text:sub(1, -2) end
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tx = renderer.draw_text(font, text, tx, ty, color)
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if tx > self.position.x + self.size.x then break end
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end
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return self:get_line_height()
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end
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@ -54,6 +54,7 @@ uint8_t *command_buf = NULL;
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static bool resize_issue;
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static int command_buf_idx;
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static RenRect screen_rect;
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static RenRect last_clip_rect;
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static bool show_debug;
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static inline int rencache_min(int a, int b) { return a < b ? a : b; }
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@ -156,12 +157,15 @@ void rencache_show_debug(bool enable) {
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void rencache_set_clip_rect(RenRect rect) {
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Command *cmd = push_command(SET_CLIP, COMMAND_BARE_SIZE);
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if (cmd) { cmd->rect = intersect_rects(rect, screen_rect); }
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if (cmd) {
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cmd->rect = intersect_rects(rect, screen_rect);
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last_clip_rect = cmd->rect;
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}
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}
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void rencache_draw_rect(RenRect rect, RenColor color) {
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if (!rects_overlap(screen_rect, rect) || rect.width == 0 || rect.height == 0) {
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if (rect.width == 0 || rect.height == 0 || !rects_overlap(last_clip_rect, rect)) {
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return;
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}
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Command *cmd = push_command(DRAW_RECT, COMMAND_BARE_SIZE);
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@ -175,7 +179,7 @@ float rencache_draw_text(RenFont **fonts, const char *text, size_t len, float x,
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{
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float width = ren_font_group_get_width(fonts, text, len);
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RenRect rect = { x, y, (int)width, ren_font_group_get_height(fonts) };
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if (rects_overlap(screen_rect, rect)) {
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if (rects_overlap(last_clip_rect, rect)) {
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int sz = len + 1;
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Command *cmd = push_command(DRAW_TEXT, COMMAND_BARE_SIZE + sz);
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if (cmd) {
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@ -207,6 +211,7 @@ void rencache_begin_frame() {
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screen_rect.height = h;
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rencache_invalidate();
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}
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last_clip_rect = screen_rect;
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}
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