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Generate anti-aliased triangles in bitmaps and plot via bitmap plotter. (Without anti-aliasing was too ugly to be endured.)

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This commit is contained in:
Michael Drake 2013-10-02 23:34:34 +01:00
parent 506a0e7d94
commit 2a4fb9ecd1
1 changed files with 280 additions and 118 deletions
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398
desktop/treeview.c
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@ -26,6 +26,7 @@
#include "desktop/plotters.h"
#include "desktop/textarea.h"
#include "desktop/treeview.h"
#include "image/bitmap.h"
#include "render/font.h"
#include "utils/log.h"
@ -157,16 +158,27 @@ struct treeview {
};
enum treeview_furniture_id {
TREE_FURN_EXPAND = 0,
TREE_FURN_CONTRACT,
TREE_FURN_LAST
};
struct treeview_furniture {
int size;
struct bitmap *bmp;
struct bitmap *sel;
};
struct treeview_node_style {
plot_style_t bg; /**< Background */
plot_font_style_t text; /**< Text */
plot_font_style_t itext; /**< Entry field text */
plot_style_t furn; /**< Furniture */
plot_style_t sbg; /**< Selected background */
plot_font_style_t stext; /**< Selected text */
plot_font_style_t sitext; /**< Selected entry field text */
plot_style_t sfurn; /**< Selected furniture */
struct treeview_furniture furn[TREE_FURN_LAST];
};
struct treeview_node_style plot_style_odd; /**< Plot style for odd rows */
@ -193,19 +205,6 @@ static struct treeview_resource treeview_res[TREE_RES_LAST] = {
}; /**< Treeview content resources */
enum treeview_furniture_id {
TREE_FURN_EXPAND = 0,
TREE_FURN_CONTRACT,
TREE_FURN_LAST
};
struct treeview_furniture {
int pts; /* Number of points (max = 8) */
int c[8]; /* Coordinate array. x-coord, y-coord... */
};
static struct treeview_furniture tree_furn[TREE_FURN_LAST];
/* Find the next node in depth first tree order
*
* \param node Start node
@ -1669,12 +1668,10 @@ void treeview_redraw(treeview *tree, int x, int y, struct rect *clip,
plot_style_t *bg_style;
plot_font_style_t *text_style;
plot_font_style_t *infotext_style;
plot_style_t *furn_style;
struct bitmap *furniture;
int height;
int sel_min, sel_max;
bool invert_selection;
enum treeview_furniture_id furn_id;
int coords[8];
assert(tree != NULL);
assert(tree->root != NULL);
@ -1763,12 +1760,16 @@ void treeview_redraw(treeview *tree, int x, int y, struct rect *clip,
bg_style = &style->sbg;
text_style = &style->stext;
infotext_style = &style->sitext;
furn_style = &style->sfurn;
furniture = (node->flags & TREE_NODE_EXPANDED) ?
style->furn[TREE_FURN_CONTRACT].sel :
style->furn[TREE_FURN_EXPAND].sel;
} else {
bg_style = &style->bg;
text_style = &style->text;
infotext_style = &style->itext;
furn_style = &style->furn;
furniture = (node->flags & TREE_NODE_EXPANDED) ?
style->furn[TREE_FURN_CONTRACT].bmp :
style->furn[TREE_FURN_EXPAND].bmp;
}
/* Render background */
@ -1777,18 +1778,11 @@ void treeview_redraw(treeview *tree, int x, int y, struct rect *clip,
new_ctx.plot->rectangle(r.x0, y0, r.x1, y1, bg_style);
/* Render toggle */
if (node->flags & TREE_NODE_EXPANDED) {
furn_id = TREE_FURN_CONTRACT;
} else {
furn_id = TREE_FURN_EXPAND;
}
for (i = 0; i < tree_furn[furn_id].pts; i += 2) {
coords[i ] = tree_furn[furn_id].c[i ] + inset;
coords[i + 1] = tree_furn[furn_id].c[i + 1] + render_y;
}
new_ctx.plot->polygon(coords, tree_furn[furn_id].pts / 2,
furn_style);
new_ctx.plot->bitmap(inset, render_y + tree_g.line_height / 4,
style->furn[TREE_FURN_EXPAND].size,
style->furn[TREE_FURN_EXPAND].size,
furniture,
bg_style->fill_colour, BITMAPF_NONE);
/* Render icon */
if (node->type == TREE_NODE_ENTRY)
@ -3481,10 +3475,6 @@ static void treeview_init_plot_styles(int font_pt_size)
plot_style_even.text.foreground,
plot_style_even.text.background, 255 * 10 / 16);
/* Furniture colour */
plot_style_even.furn = plot_style_even.bg;
plot_style_even.furn.fill_colour = plot_style_even.itext.foreground;
/* Selected background colour */
plot_style_even.sbg = plot_style_even.bg;
plot_style_even.sbg.fill_colour = gui_system_colour_char("Highlight");
@ -3501,10 +3491,6 @@ static void treeview_init_plot_styles(int font_pt_size)
plot_style_even.stext.foreground,
plot_style_even.stext.background, 255 * 25 / 32);
/* Selected furniture colour */
plot_style_even.sfurn = plot_style_even.bg;
plot_style_even.sfurn.fill_colour = plot_style_even.sitext.foreground;
/* Odd numbered node styles */
plot_style_odd.bg = plot_style_even.bg;
@ -3517,13 +3503,10 @@ static void treeview_init_plot_styles(int font_pt_size)
plot_style_odd.itext.foreground = mix_colour(
plot_style_odd.text.foreground,
plot_style_odd.text.background, 255 * 10 / 16);
plot_style_odd.furn = plot_style_odd.bg;
plot_style_odd.furn.fill_colour = plot_style_odd.itext.foreground;
plot_style_odd.sbg = plot_style_even.sbg;
plot_style_odd.stext = plot_style_even.stext;
plot_style_odd.sitext = plot_style_even.sitext;
plot_style_odd.sfurn = plot_style_even.sfurn;
}
@ -3570,92 +3553,259 @@ static void treeview_init_resources(void)
}
/**
* Create a right-pointing anti-aliased triangle bitmap
*
* bg background colour
* fg foreground colour
* size required bitmap size
*/
static struct bitmap * treeview_generate_triangle_bitmap(
colour bg, colour fg, int size)
{
struct bitmap *b = NULL;
int x, y;
unsigned char *rpos;
unsigned char *pos;
size_t stride;
/* Set up required colour graduations. Ignores screen gamma. */
colour colour0 = bg;
colour colour1 = mix_colour(bg, fg, 255 * 3 / 4);
colour colour2 = blend_colour(bg, fg);
colour colour3 = mix_colour(bg, fg, 255 * 1 / 4);
colour colour4 = fg;
/* Create the bitmap */
b = bitmap_create(size, size, BITMAP_NEW | BITMAP_OPAQUE);
if (b == NULL)
return NULL;
rpos = bitmap_get_buffer(b);
stride = bitmap_get_rowstride(b);
/* Draw the triangle */
for (y = 0; y < size; y++) {
pos = rpos;
if (y < size / 2) {
/* Top half */
for (x = 0; x < y * 2; x++) {
*(pos++) = red_from_colour(colour4);
*(pos++) = green_from_colour(colour4);
*(pos++) = blue_from_colour(colour4);
pos++;
}
*(pos++) = red_from_colour(colour3);
*(pos++) = green_from_colour(colour3);
*(pos++) = blue_from_colour(colour3);
pos++;
*(pos++) = red_from_colour(colour1);
*(pos++) = green_from_colour(colour1);
*(pos++) = blue_from_colour(colour1);
pos++;
for (x = y * 2 + 2; x < size ; x++) {
*(pos++) = red_from_colour(colour0);
*(pos++) = green_from_colour(colour0);
*(pos++) = blue_from_colour(colour0);
pos++;
}
} else if ((y == size / 2) && (size & 0x1)) {
/* Middle row */
for (x = 0; x < size - 1; x++) {
*(pos++) = red_from_colour(colour4);
*(pos++) = green_from_colour(colour4);
*(pos++) = blue_from_colour(colour4);
pos++;
}
*(pos++) = red_from_colour(colour2);
*(pos++) = green_from_colour(colour2);
*(pos++) = blue_from_colour(colour2);
pos++;
} else {
/* Bottom half */
for (x = 0; x < (size - y - 1) * 2; x++) {
*(pos++) = red_from_colour(colour4);
*(pos++) = green_from_colour(colour4);
*(pos++) = blue_from_colour(colour4);
pos++;
}
*(pos++) = red_from_colour(colour3);
*(pos++) = green_from_colour(colour3);
*(pos++) = blue_from_colour(colour3);
pos++;
*(pos++) = red_from_colour(colour1);
*(pos++) = green_from_colour(colour1);
*(pos++) = blue_from_colour(colour1);
pos++;
for (x = (size - y) * 2; x < size ; x++) {
*(pos++) = red_from_colour(colour0);
*(pos++) = green_from_colour(colour0);
*(pos++) = blue_from_colour(colour0);
pos++;
}
}
rpos += stride;
}
bitmap_modified(b);
return b;
}
/**
* Create bitmap copy of another bitmap
*
* orig bitmap to copy
* size required bitmap size
*/
static struct bitmap * treeview_generate_copy_bitmap(
struct bitmap *orig, int size)
{
struct bitmap *b = NULL;
unsigned char *data;
unsigned char *orig_data;
size_t stride;
if (orig == NULL)
return NULL;
assert(size == bitmap_get_width(orig));
assert(size == bitmap_get_height(orig));
/* Create the bitmap */
b = bitmap_create(size, size, BITMAP_NEW | BITMAP_OPAQUE);
if (b == NULL)
return NULL;
stride = bitmap_get_rowstride(b);
assert(stride == bitmap_get_rowstride(orig));
data = bitmap_get_buffer(b);
orig_data = bitmap_get_buffer(orig);
/* Copy the bitmap */
memcpy(data, orig_data, stride * size);
bitmap_modified(b);
return b;
}
/**
* Create bitmap from rotation of another bitmap
*
* orig bitmap to create rotation of
* size required bitmap size
*/
static struct bitmap * treeview_generate_rotate_bitmap(
struct bitmap *orig, int size)
{
struct bitmap *b = NULL;
int x, y;
unsigned char *rpos;
unsigned char *pos;
unsigned char *orig_data;
unsigned char *orig_pos;
size_t stride;
if (orig == NULL)
return NULL;
assert(size == bitmap_get_width(orig));
assert(size == bitmap_get_height(orig));
/* Create the bitmap */
b = bitmap_create(size, size, BITMAP_NEW | BITMAP_OPAQUE);
if (b == NULL)
return NULL;
stride = bitmap_get_rowstride(b);
assert(stride == bitmap_get_rowstride(orig));
rpos = bitmap_get_buffer(b);
orig_data = bitmap_get_buffer(orig);
/* Copy the rotated bitmap */
for (y = 0; y < size; y++) {
pos = rpos;
for (x = 0; x < size; x++) {
orig_pos = orig_data + x * stride + y * 4;
*(pos++) = *(orig_pos++);
*(pos++) = *(orig_pos++);
*(pos++) = *(orig_pos);
pos++;
}
rpos += stride;
}
bitmap_modified(b);
return b;
}
/**
* Measures width of characters used to represent treeview furniture.
*/
static void treeview_init_furniture(void)
static nserror treeview_init_furniture(void)
{
struct treeview_furniture *f;
int size = tree_g.line_height / 2;
int smax = size - 1;
int i, y;
/* Make TREE_FURN_EXPAND */
f = &(tree_furn[TREE_FURN_EXPAND]);
plot_style_odd.furn[TREE_FURN_EXPAND].size = size;
plot_style_odd.furn[TREE_FURN_EXPAND].bmp =
treeview_generate_triangle_bitmap(
plot_style_odd.bg.fill_colour,
plot_style_odd.itext.foreground, size);
plot_style_odd.furn[TREE_FURN_EXPAND].sel =
treeview_generate_triangle_bitmap(
plot_style_odd.sbg.fill_colour,
plot_style_odd.sitext.foreground, size);
if (size & 0x1) {
/* Size is odd; triangle */
f->pts = 6;
plot_style_even.furn[TREE_FURN_EXPAND].size = size;
plot_style_even.furn[TREE_FURN_EXPAND].bmp =
treeview_generate_triangle_bitmap(
plot_style_even.bg.fill_colour,
plot_style_even.itext.foreground, size);
plot_style_even.furn[TREE_FURN_EXPAND].sel =
treeview_generate_copy_bitmap(
plot_style_odd.furn[TREE_FURN_EXPAND].sel, size);
f->c[0] = 0;
f->c[1] = 0;
plot_style_odd.furn[TREE_FURN_CONTRACT].size = size;
plot_style_odd.furn[TREE_FURN_CONTRACT].bmp =
treeview_generate_rotate_bitmap(
plot_style_odd.furn[TREE_FURN_EXPAND].bmp, size);
plot_style_odd.furn[TREE_FURN_CONTRACT].sel =
treeview_generate_rotate_bitmap(
plot_style_odd.furn[TREE_FURN_EXPAND].sel, size);
f->c[2] = smax;
f->c[3] = size / 2;
plot_style_even.furn[TREE_FURN_CONTRACT].size = size;
plot_style_even.furn[TREE_FURN_CONTRACT].bmp =
treeview_generate_rotate_bitmap(
plot_style_even.furn[TREE_FURN_EXPAND].bmp, size);
plot_style_even.furn[TREE_FURN_CONTRACT].sel =
treeview_generate_rotate_bitmap(
plot_style_even.furn[TREE_FURN_EXPAND].sel, size);
f->c[4] = 0;
f->c[5] = smax;
} else {
/* Size is even; trapezium */
f->pts = 8;
f->c[0] = 0;
f->c[1] = 0;
f->c[2] = smax;
f->c[3] = size / 2 - 1;
f->c[4] = smax;
f->c[5] = size / 2;
f->c[6] = 0;
f->c[7] = smax;
}
/* Make TREE_FURN_CONTRACT */
f = &(tree_furn[TREE_FURN_CONTRACT]);
if (size & 0x1) {
/* Size is odd; triangle */
f->pts = 6;
f->c[0] = 0;
f->c[1] = 0;
f->c[2] = smax;
f->c[3] = 0;
f->c[4] = size / 2;
f->c[5] = smax;
} else {
/* Size is even; trapezium */
f->pts = 8;
f->c[0] = 0;
f->c[1] = 0;
f->c[2] = smax;
f->c[3] = 0;
f->c[4] = size / 2;
f->c[5] = smax;
f->c[6] = size / 2 - 1;
f->c[7] = smax;
}
/* Vertically offset for line height */
for (i = 0; i < TREE_FURN_LAST; i++) {
f = &(tree_furn[i]);
for (y = 1; y < f->pts; y += 2) {
f->c[y] += tree_g.line_height / 4;
}
}
if (plot_style_odd.furn[TREE_FURN_EXPAND].bmp == NULL ||
plot_style_odd.furn[TREE_FURN_EXPAND].sel == NULL ||
plot_style_even.furn[TREE_FURN_EXPAND].bmp == NULL ||
plot_style_even.furn[TREE_FURN_EXPAND].sel == NULL ||
plot_style_odd.furn[TREE_FURN_CONTRACT].bmp == NULL ||
plot_style_odd.furn[TREE_FURN_CONTRACT].sel == NULL ||
plot_style_even.furn[TREE_FURN_CONTRACT].bmp == NULL ||
plot_style_even.furn[TREE_FURN_CONTRACT].sel == NULL)
return NSERROR_NOMEM;
tree_g.furniture_width = size + tree_g.line_height / 4;
return NSERROR_OK;
}
@ -3663,6 +3813,7 @@ static void treeview_init_furniture(void)
nserror treeview_init(int font_pt_size)
{
int font_px_size;
nserror err;
if (tree_g.initialised == true)
return NSERROR_OK;
@ -3675,7 +3826,9 @@ nserror treeview_init(int font_pt_size)
treeview_init_plot_styles(font_pt_size);
treeview_init_resources();
treeview_init_furniture();
err = treeview_init_furniture();
if (err != NSERROR_OK)
return err;
tree_g.step_width = tree_g.furniture_width;
tree_g.window_padding = 6;
@ -3699,6 +3852,15 @@ nserror treeview_fini(void)
hlcache_handle_release(treeview_res[i].c);
}
bitmap_destroy(plot_style_odd.furn[TREE_FURN_EXPAND].bmp);
bitmap_destroy(plot_style_odd.furn[TREE_FURN_EXPAND].sel);
bitmap_destroy(plot_style_even.furn[TREE_FURN_EXPAND].bmp);
bitmap_destroy(plot_style_even.furn[TREE_FURN_EXPAND].sel);
bitmap_destroy(plot_style_odd.furn[TREE_FURN_CONTRACT].bmp);
bitmap_destroy(plot_style_odd.furn[TREE_FURN_CONTRACT].sel);
bitmap_destroy(plot_style_even.furn[TREE_FURN_CONTRACT].bmp);
bitmap_destroy(plot_style_even.furn[TREE_FURN_CONTRACT].sel);
tree_g.initialised = false;
return NSERROR_OK;