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loader: cursor off should restore display content

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When drawing cursor, we should store original display
content because there may be image data we would like to restore
when the cursor is removed.

PR:		254054
Reported by:	Jose Luis Duran
MFC after:	3 days
This commit is contained in:
Toomas Soome 2021-03-06 12:19:43 +02:00
parent 9d3b2bcf76
commit d708f23ebb
2 changed files with 40 additions and 0 deletions
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38
stand/common/gfx_fb.c
View File

@ -978,6 +978,7 @@ gfx_fb_fill(void *arg, const teken_rect_t *r, teken_char_t c,
static void
gfx_fb_cursor_draw(teken_gfx_t *state, const teken_pos_t *p, bool on)
{
unsigned x, y, width, height;
const uint8_t *glyph;
int idx;
@ -985,10 +986,47 @@ gfx_fb_cursor_draw(teken_gfx_t *state, const teken_pos_t *p, bool on)
if (idx >= state->tg_tp.tp_col * state->tg_tp.tp_row)
return;
width = state->tg_font.vf_width;
height = state->tg_font.vf_height;
x = state->tg_origin.tp_col + p->tp_col * width;
y = state->tg_origin.tp_row + p->tp_row * height;
/*
* Save original display content to preserve image data.
*/
if (on) {
if (state->tg_cursor_image == NULL ||
state->tg_cursor_size != width * height * 4) {
free(state->tg_cursor_image);
state->tg_cursor_size = width * height * 4;
state->tg_cursor_image = malloc(state->tg_cursor_size);
}
if (state->tg_cursor_image != NULL) {
if (gfxfb_blt(state->tg_cursor_image,
GfxFbBltVideoToBltBuffer, x, y, 0, 0,
width, height, 0) != 0) {
free(state->tg_cursor_image);
state->tg_cursor_image = NULL;
}
}
} else {
/*
* Restore display from tg_cursor_image.
* If there is no image, restore char from screen_buffer.
*/
if (state->tg_cursor_image != NULL &&
gfxfb_blt(state->tg_cursor_image, GfxFbBltBufferToVideo,
0, 0, x, y, width, height, 0) == 0) {
state->tg_cursor = *p;
return;
}
}
glyph = font_lookup(&state->tg_font, screen_buffer[idx].c,
&screen_buffer[idx].a);
gfx_bitblt_bitmap(state, glyph, &screen_buffer[idx].a, 0xff, on);
gfx_fb_printchar(state, p);
state->tg_cursor = *p;
}

2
stand/common/gfx_fb.h
View File

@ -210,6 +210,8 @@ typedef struct teken_gfx {
teken_t tg_teken; /* Teken core */
teken_pos_t tg_cursor; /* Where cursor was drawn */
bool tg_cursor_visible;
uint8_t *tg_cursor_image; /* Memory for cursor */
size_t tg_cursor_size;
teken_pos_t tg_tp; /* Terminal dimensions */
teken_pos_t tg_origin; /* Point of origin in pixels */
uint8_t *tg_glyph; /* Memory for glyph */