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Avoid drawing hidden text in DocView:draw_line_text (#1298)

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* 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.
This commit is contained in:
Guldoman
2023-08-19 12:28:48 +08:00
committed by takase1121
parent d54a5d0672
commit bddb5e274d
2 changed files with 9 additions and 3 deletions
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src/rencache.c
+8 -3
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@@ -54,6 +54,7 @@ uint8_t *command_buf = NULL;
static bool resize_issue;
static int command_buf_idx;
static RenRect screen_rect;
static RenRect last_clip_rect;
static bool show_debug;
static inline int rencache_min(int a, int b) { return a < b ? a : b; }
@@ -156,12 +157,15 @@ void rencache_show_debug(bool enable) {
void rencache_set_clip_rect(RenRect rect) {
Command *cmd = push_command(SET_CLIP, COMMAND_BARE_SIZE);
if (cmd) { cmd->rect = intersect_rects(rect, screen_rect); }
if (cmd) {
cmd->rect = intersect_rects(rect, screen_rect);
last_clip_rect = cmd->rect;
}
}
void rencache_draw_rect(RenRect rect, RenColor color) {
if (!rects_overlap(screen_rect, rect) || rect.width == 0 || rect.height == 0) {
if (rect.width == 0 || rect.height == 0 || !rects_overlap(last_clip_rect, rect)) {
return;
}
Command *cmd = push_command(DRAW_RECT, COMMAND_BARE_SIZE);
@@ -175,7 +179,7 @@ float rencache_draw_text(RenFont **fonts, const char *text, size_t len, float x,
{
float width = ren_font_group_get_width(fonts, text, len);
RenRect rect = { x, y, (int)width, ren_font_group_get_height(fonts) };
if (rects_overlap(screen_rect, rect)) {
if (rects_overlap(last_clip_rect, rect)) {
int sz = len + 1;
Command *cmd = push_command(DRAW_TEXT, COMMAND_BARE_SIZE + sz);
if (cmd) {
@@ -207,6 +211,7 @@ void rencache_begin_frame() {
screen_rect.height = h;
rencache_invalidate();
}
last_clip_rect = screen_rect;
}