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term: Reverse video should not make the cursor invisible

This commit is contained in:
mintsuki 2021-08-25 23:57:19 +02:00
parent 31f52c2b30
commit a5def082c3
2 changed files with 22 additions and 11 deletions
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6
stage23/drivers/vga_textmode.s2.c
View File

@ -29,8 +29,6 @@ static struct context {
#define cursor_status context.cursor_status
uint8_t text_palette;
#define text_palette context.text_palette
uint8_t cursor_palette;
#define cursor_palette context.cursor_palette
bool scroll_enabled;
#define scroll_enabled context.scroll_enabled
} context;
@ -43,7 +41,8 @@ static void clear_cursor(void) {
static void draw_cursor(void) {
if (cursor_status) {
video_mem[cursor_offset + 1] = cursor_palette;
uint16_t c = current_buffer[cursor_offset + 1];
video_mem[cursor_offset + 1] = (c << 4) | (c >> 4);
}
}
@ -165,7 +164,6 @@ void init_vga_textmode(size_t *_rows, size_t *_cols, bool managed) {
cursor_offset = 0;
cursor_status = true;
text_palette = 0x07;
cursor_palette = 0x70;
scroll_enabled = true;
text_clear(false);

27
stage23/lib/gterm.c
View File

@ -86,11 +86,16 @@ void gterm_swap_palette(void) {
}
}
#define A(rgb) (uint8_t)(rgb >> 24)
#define R(rgb) (uint8_t)(rgb >> 16)
#define G(rgb) (uint8_t)(rgb >> 8)
#define B(rgb) (uint8_t)(rgb)
#define ARGB(a, r, g, b) (a << 24) | ((r & 0xFF) << 16) | ((g & 0xFF) << 8) | (b & 0xFF)
#define A(rgb) ((uint8_t)((rgb) >> 24))
#define R(rgb) ((uint8_t)((rgb) >> 16))
#define G(rgb) ((uint8_t)((rgb) >> 8))
#define B(rgb) ((uint8_t)((rgb) >> 0))
#define ARGB(a, r, g, b) ( \
((uint32_t)((a) & 0xFF) << 24) \
| ((uint32_t)((r) & 0xFF) << 16) \
| ((uint32_t)((g) & 0xFF) << 8) \
| ((uint32_t)((b) & 0xFF) << 0) \
)
static inline uint32_t colour_blend(uint32_t fg, uint32_t bg) {
unsigned alpha = 255 - A(fg);
@ -337,8 +342,16 @@ static void clear_cursor(void) {
static void draw_cursor(void) {
if (cursor_status) {
struct gterm_char c = grid[cursor_x + cursor_y * cols];
c.fg = 0;
c.bg = 0xcccccc;
uint32_t tmp = c.fg;
if (c.bg == 0xffffffff) {
c.fg = ARGB(A(tmp),
R(tmp) < 128 ? 255 : 0,
G(tmp) < 128 ? 255 : 0,
B(tmp) < 128 ? 255 : 0);
} else {
c.fg = c.bg;
}
c.bg = tmp;
plot_char_grid_force(&c, cursor_x, cursor_y);
}
}