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Fix possible rounding errors.

This commit is contained in:
Fernando Tarlá Cardoso Lemos 2010-09-12 16:54:18 -03:00 committed by Michael Stapelberg
parent fa3ad8be10
commit 6d54b5a506
1 changed files with 39 additions and 8 deletions
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47
src/layout.c
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@ -702,6 +702,43 @@ void render_workspace(xcb_connection_t *conn, Output *output, Workspace *r_ws) {
ignore_enter_notify_forall(conn, r_ws, true);
/* Get the width of the cols */
int col_width[r_ws->cols];
int unoccupied_x = get_unoccupied_x(r_ws);
int default_col_width = unoccupied_x / r_ws->cols;
int total_col_width = 0;
for (int i = 0; i < r_ws->cols; ++i) {
col_width[i] = r_ws->width_factor[i] == 0 ? default_col_width : unoccupied_x * r_ws->width_factor[i];
total_col_width += col_width[i];
}
/* Correct rounding errors */
int error = r_ws->rect.width - total_col_width, error_index = r_ws->cols - 1;
while (error) {
++col_width[error_index];
--error;
error_index = error_index == 0 ? r_ws->cols - 1 : error_index - 1;
}
/* Get the height of the rows */
int row_height[r_ws->rows];
int unoccupied_y = get_unoccupied_y(r_ws);
int default_row_height = unoccupied_y / r_ws->rows;
int total_row_height = 0;
for (int i = 0; i < r_ws->rows; ++i) {
row_height[i] = r_ws->height_factor[i] == 0 ? default_row_height : unoccupied_y * r_ws->height_factor[i];
total_row_height += row_height[i];
}
/* Correct rounding errors */
error = workspace_height(r_ws) - total_row_height;
error_index = r_ws->rows - 1;
while (error) {
++row_height[error_index];
--error;
error_index = error_index == 0 ? r_ws->rows - 1 : error_index - 1;
}
/* Go through the whole table and render what’s necessary */
FOR_TABLE(r_ws) {
Container *container = r_ws->table[cols][rows];
@ -716,10 +753,7 @@ void render_workspace(xcb_connection_t *conn, Output *output, Workspace *r_ws) {
container->width = 0;
for (int c = 0; c < container->colspan; c++) {
if (r_ws->width_factor[cols+c] == 0)
container->width += (width / r_ws->cols);
else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
container->width += col_width[cols + c];
if (single_width == -1)
single_width = container->width;
}
@ -729,10 +763,7 @@ void render_workspace(xcb_connection_t *conn, Output *output, Workspace *r_ws) {
container->height = 0;
for (int c = 0; c < container->rowspan; c++) {
if (r_ws->height_factor[rows+c] == 0)
container->height += (height / r_ws->rows);
else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
container->height += row_height[rows + c];
if (single_height == -1)
single_height = container->height;
}