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#include <stdio.h>
#include <stdlib.h>
#include "runes.h"
static void runes_display_recalculate_font_metrics(RunesTerm *t);
static void runes_display_draw_cell(RunesTerm *t, int row, int col);
static void runes_display_paint_rectangle(
RunesTerm *t, cairo_t *cr, cairo_pattern_t *pattern,
int row, int col, int width, int height);
static void runes_display_draw_glyph(
RunesTerm *t, cairo_t *cr, cairo_pattern_t *pattern,
struct runes_cell_attrs attrs, char *buf, size_t len, int row, int col);
void runes_display_init(RunesTerm *t)
{
runes_display_recalculate_font_metrics(t);
t->cursorcolor = cairo_pattern_create_rgba(0.0, 1.0, 0.0, 0.5);
}
void runes_display_set_window_size(RunesTerm *t)
{
int width, height;
cairo_t *old_cr = NULL;
cairo_surface_t *surface;
runes_window_backend_get_size(t, &width, &height);
if (width == t->xpixel && height == t->ypixel) {
return;
}
t->xpixel = width;
t->ypixel = height;
t->scr.max.row = t->ypixel / t->fonty;
t->scr.max.col = t->xpixel / t->fontx;
t->scr.scroll_top = 0;
t->scr.scroll_bottom = t->scr.max.row - 1;
old_cr = t->cr;
/* XXX this should really use cairo_surface_create_similar_image, but when
* i did that, drawing calls would occasionally block until an X event
* occurred for some reason. should look into this, because i think
* create_similar_image does things that are more efficient (using some
* xlib shm stuff) */
surface = cairo_image_surface_create(
CAIRO_FORMAT_RGB24, t->xpixel, t->ypixel);
t->cr = cairo_create(surface);
cairo_surface_destroy(surface);
if (t->layout) {
pango_cairo_update_layout(t->cr, t->layout);
}
else {
PangoAttrList *attrs;
PangoFontDescription *font_desc;
attrs = pango_attr_list_new();
font_desc = pango_font_description_from_string(t->font_name);
t->layout = pango_cairo_create_layout(t->cr);
pango_layout_set_attributes(t->layout, attrs);
pango_layout_set_font_description(t->layout, font_desc);
pango_attr_list_unref(attrs);
pango_font_description_free(font_desc);
}
cairo_save(t->cr);
if (old_cr) {
cairo_set_source_surface(t->cr, cairo_get_target(old_cr), 0.0, 0.0);
}
else {
cairo_set_source(t->cr, t->bgdefault);
}
cairo_paint(t->cr);
cairo_restore(t->cr);
if (old_cr) {
cairo_destroy(old_cr);
}
runes_pty_backend_set_window_size(t);
}
void runes_display_draw_screen(RunesTerm *t)
{
int r, c;
/* XXX quite inefficient */
for (r = 0; r < t->scr.max.row; ++r) {
for (c = 0; c < t->scr.max.col; ++c) {
runes_display_draw_cell(t, r, c);
}
}
runes_window_backend_request_flush(t);
}
void runes_display_cleanup(RunesTerm *t)
{
g_object_unref(t->layout);
if (t->fgcustom) {
cairo_pattern_destroy(t->fgcustom);
}
if (t->bgcustom) {
cairo_pattern_destroy(t->bgcustom);
}
cairo_pattern_destroy(t->cursorcolor);
cairo_destroy(t->cr);
}
static void runes_display_recalculate_font_metrics(RunesTerm *t)
{
PangoFontDescription *desc;
PangoContext *context;
PangoFontMetrics *metrics;
int ascent, descent;
if (t->layout) {
desc = (PangoFontDescription *)pango_layout_get_font_description(
t->layout);
context = pango_layout_get_context(t->layout);
}
else {
desc = pango_font_description_from_string(t->font_name);
context = pango_font_map_create_context(
pango_cairo_font_map_get_default());
}
metrics = pango_context_get_metrics(context, desc, NULL);
t->fontx = PANGO_PIXELS(
pango_font_metrics_get_approximate_digit_width(metrics));
ascent = pango_font_metrics_get_ascent(metrics);
descent = pango_font_metrics_get_descent(metrics);
t->fonty = PANGO_PIXELS(ascent + descent);
pango_font_metrics_unref(metrics);
if (!t->layout) {
pango_font_description_free(desc);
g_object_unref(context);
}
}
static void runes_display_draw_cell(RunesTerm *t, int row, int col)
{
struct runes_cell *cell = &t->scr.rows[row].cells[col];
cairo_pattern_t *bg = NULL, *fg = NULL;
switch (cell->attrs.bgcolor.type) {
case RUNES_COLOR_DEFAULT:
bg = t->bgdefault;
break;
case RUNES_COLOR_IDX:
bg = t->colors[cell->attrs.bgcolor.idx];
break;
case RUNES_COLOR_RGB:
/* XXX */
fprintf(stderr, "rgb colors nyi\n");
break;
}
switch (cell->attrs.fgcolor.type) {
case RUNES_COLOR_DEFAULT:
fg = t->fgdefault;
break;
case RUNES_COLOR_IDX:
fg = t->colors[cell->attrs.fgcolor.idx];
break;
case RUNES_COLOR_RGB:
/* XXX */
fprintf(stderr, "rgb colors nyi\n");
break;
}
if (bg) {
runes_display_paint_rectangle(t, t->cr, bg, row, col, 1, 1);
}
if (cell->len) {
runes_display_draw_glyph(
t, t->cr, fg, cell->attrs, cell->contents, cell->len, row, col);
}
}
static void runes_display_paint_rectangle(
RunesTerm *t, cairo_t *cr, cairo_pattern_t *pattern,
int row, int col, int width, int height)
{
cairo_save(cr);
cairo_set_source(cr, pattern);
cairo_rectangle(
cr, col * t->fontx, row * t->fonty,
width * t->fontx, height * t->fonty);
cairo_fill(cr);
cairo_restore(cr);
}
static void runes_display_draw_glyph(
RunesTerm *t, cairo_t *cr, cairo_pattern_t *pattern,
struct runes_cell_attrs attrs, char *buf, size_t len, int row, int col)
{
PangoAttrList *pango_attrs;
pango_attrs = pango_layout_get_attributes(t->layout);
if (t->bold_is_bold) {
pango_attr_list_change(
pango_attrs, pango_attr_weight_new(
attrs.bold ? PANGO_WEIGHT_BOLD : PANGO_WEIGHT_NORMAL));
}
pango_attr_list_change(
pango_attrs, pango_attr_style_new(
attrs.italic ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL));
pango_attr_list_change(
pango_attrs, pango_attr_underline_new(
attrs.underline ? PANGO_UNDERLINE_SINGLE : PANGO_UNDERLINE_NONE));
cairo_save(cr);
cairo_move_to(cr, col * t->fontx, row * t->fonty);
cairo_set_source(cr, pattern);
pango_layout_set_text(t->layout, buf, len);
pango_cairo_update_layout(t->cr, t->layout);
pango_cairo_show_layout(t->cr, t->layout);
cairo_restore(cr);
}
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