/*
* Copyright (c) 2020 Jiri Svoboda
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup libgfxfont
* @{
*/
/**
* @file Glyph bitmap
*/
#include <errno.h>
#include <gfx/bitmap.h>
#include <gfx/coord.h>
#include <gfx/glyph_bmp.h>
#include <io/pixelmap.h>
#include <stdlib.h>
#include "../private/font.h"
#include "../private/glyph.h"
#include "../private/glyph_bmp.h"
static errno_t gfx_glyph_bmp_extend(gfx_glyph_bmp_t *, gfx_coord2_t *);
/** Open glyph bitmap for editing.
*
* @param glyph Glyph
* @param rbmp Place to store glyph bitmap
* @return EOK on success, ENOMEM if out of memory
*/
errno_t gfx_glyph_bmp_open(gfx_glyph_t *glyph, gfx_glyph_bmp_t **rbmp)
{
gfx_font_t *font = glyph->font;
gfx_glyph_bmp_t *bmp;
pixelmap_t pmap;
gfx_bitmap_alloc_t alloc;
gfx_coord_t x, y;
pixel_t pixel;
errno_t rc;
bmp = calloc(1, sizeof(gfx_glyph_bmp_t));
if (bmp == NULL)
return ENOMEM;
/* Bitmap coordinates are relative to glyph origin point */
gfx_rect_rtranslate(&glyph->origin, &glyph->rect, &bmp->rect);
bmp->pixels = calloc((bmp->rect.p1.x - bmp->rect.p0.x) *
(bmp->rect.p1.y - bmp->rect.p0.y), sizeof(int));
if (bmp->pixels == NULL) {
free(bmp);
return ENOMEM;
}
rc = gfx_bitmap_get_alloc(font->bitmap, &alloc);
if (rc != EOK) {
free(bmp->pixels);
free(bmp);
return rc;
}
assert(font->rect.p0.x == 0);
assert(font->rect.p0.y == 0);
pmap.width = font->rect.p1.x;
pmap.height = font->rect.p1.y;
pmap.data = alloc.pixels;
/* Copy pixels from font bitmap */
for (y = bmp->rect.p0.y; y < bmp->rect.p1.y; y++) {
for (x = bmp->rect.p0.x; x < bmp->rect.p1.x; x++) {
pixel = pixelmap_get_pixel(&pmap, glyph->origin.x + x,
glyph->origin.y + y);
bmp->pixels[(y - bmp->rect.p0.y) *
(bmp->rect.p1.x - bmp->rect.p0.x) +
(x - bmp->rect.p0.x)] = (pixel != 0) ? 1 : 0;
}
}
bmp->glyph = glyph;
*rbmp = bmp;
return EOK;
}
/** Save glyph bitmap.
*
* @param bmp Glyph bitmap
* @return EOK on success, ENOMEM if out of memory
*/
errno_t gfx_glyph_bmp_save(gfx_glyph_bmp_t *bmp)
{
gfx_glyph_t *glyph = bmp->glyph;
gfx_font_t *font = glyph->font;
gfx_coord_t x, y;
gfx_rect_t used_rect;
pixel_t pixel;
pixelmap_t pmap;
gfx_bitmap_alloc_t alloc;
errno_t rc;
/* Find actual rectangle being used */
gfx_glyph_bmp_find_used_rect(bmp, &used_rect);
/*
* Replace glyph with empty space in the font bitmap, the width
* of the empty equal to new glyph bitmap width. The glyph width
* is adjusted.
*/
rc = gfx_font_splice_at_glyph(font, glyph, &used_rect);
if (rc != EOK)
return rc;
rc = gfx_bitmap_get_alloc(font->bitmap, &alloc);
if (rc != EOK)
return rc;
assert(font->rect.p0.x == 0);
assert(font->rect.p0.y == 0);
pmap.width = font->rect.p1.x;
pmap.height = font->rect.p1.y;
pmap.data = alloc.pixels;
/* Copy pixels to font bitmap */
for (y = used_rect.p0.y; y < used_rect.p1.y; y++) {
for (x = used_rect.p0.x; x < used_rect.p1.x; x++) {
pixel = bmp->pixels[(y - bmp->rect.p0.y) *
(bmp->rect.p1.x - bmp->rect.p0.x) +
(x - bmp->rect.p0.x)] ?
PIXEL(255, 255, 255, 255) : PIXEL(0, 0, 0, 0);
pixelmap_put_pixel(&pmap, glyph->origin.x + x,
glyph->origin.y + y, pixel);
}
}
return EOK;
}
/** Close glyph bitmap.
*
* @param bmp Glyph bitmap
*/
void gfx_glyph_bmp_close(gfx_glyph_bmp_t *bmp)
{
free(bmp->pixels);
free(bmp);
}
/** Get rectangle covered by glyph bitmap.
*
* @param bmp Glyph bitmap
* @param rect Place to store rectangle
*/
void gfx_glyph_bmp_get_rect(gfx_glyph_bmp_t *bmp, gfx_rect_t *rect)
{
*rect = bmp->rect;
}
/** Find minimum rectangle covering all non-background pixels.
*
* @param bmp Glyph bitmap
* @param rect Place to store rectangle
*/
void gfx_glyph_bmp_find_used_rect(gfx_glyph_bmp_t *bmp, gfx_rect_t *rect)
{
gfx_coord_t x, y;
gfx_coord2_t min;
gfx_coord2_t max;
bool anypix;
int pix;
min.x = bmp->rect.p1.x;
min.y = bmp->rect.p1.y;
max.x = bmp->rect.p0.x;
max.y = bmp->rect.p0.y;
anypix = false;
for (y = bmp->rect.p0.y; y < bmp->rect.p1.y; y++) {
for (x = bmp->rect.p0.x; x < bmp->rect.p1.x; x++) {
pix = gfx_glyph_bmp_getpix(bmp, x, y);
if (pix != 0) {
anypix = true;
if (x < min.x)
min.x = x;
if (y < min.y)
min.y = y;
if (x > max.x)
max.x = x;
if (y > max.y)
max.y = y;
}
}
}
if (anypix) {
rect->p0.x = min.x;
rect->p0.y = min.y;
rect->p1.x = max.x + 1;
rect->p1.y = max.y + 1;
} else {
rect->p0.x = 0;
rect->p0.y = 0;
rect->p1.x = 0;
rect->p1.y = 0;
}
}
/** Get pixel from glyph bitmap.
*
* @param bmp Glyph bitmap
* @param x X-coordinate
* @param y Y-coordinate
* @return Pixel value
*/
int gfx_glyph_bmp_getpix(gfx_glyph_bmp_t *bmp, gfx_coord_t x, gfx_coord_t y)
{
gfx_coord2_t pos;
size_t pitch;
pos.x = x;
pos.y = y;
if (!gfx_pix_inside_rect(&pos, &bmp->rect))
return 0;
pitch = bmp->rect.p1.x - bmp->rect.p0.x;
return bmp->pixels[(y - bmp->rect.p0.y) * pitch +
(x - bmp->rect.p0.x)];
}
/** Set pixel in glyph bitmap.
*
* @param bmp Glyph bitmap
* @param x X-coordinate
* @param y Y-coordinate
*
* @reutrn EOK on success, ENOMEM if out of memory
*/
errno_t gfx_glyph_bmp_setpix(gfx_glyph_bmp_t *bmp, gfx_coord_t x,
gfx_coord_t y, int value)
{
gfx_coord2_t pos;
size_t pitch;
errno_t rc;
pos.x = x;
pos.y = y;
if (!gfx_pix_inside_rect(&pos, &bmp->rect)) {
rc = gfx_glyph_bmp_extend(bmp, &pos);
if (rc != EOK)
return rc;
}
pitch = bmp->rect.p1.x - bmp->rect.p0.x;
bmp->pixels[(y - bmp->rect.p0.y) * pitch +
(x - bmp->rect.p0.x)] = value;
return EOK;
}
/** Clear glyph bitmap
*
* @param bmp Glyph bitmap
*
* @return EOK on sucesss, ENOMEM if out of memory
*/
errno_t gfx_glyph_bmp_clear(gfx_glyph_bmp_t *bmp)
{
int *npixels;
/* Allocate new pixel array */
npixels = calloc(sizeof(int), 1);
if (npixels == NULL)
return ENOMEM;
/* Switch new and old data */
free(bmp->pixels);
bmp->pixels = npixels;
bmp->rect.p0.x = 0;
bmp->rect.p0.y = 0;
bmp->rect.p1.x = 0;
bmp->rect.p1.y = 0;
return EOK;
}
/** Extend glyph bitmap to cover a patricular pixel.
*
* @param bmp Glyph bitmap
* @param pos Pixel position
*
* @return EOK on sucesss, ENOMEM if out of memory
*/
static errno_t gfx_glyph_bmp_extend(gfx_glyph_bmp_t *bmp, gfx_coord2_t *pos)
{
gfx_rect_t prect;
gfx_rect_t nrect;
int *npixels;
size_t npitch;
size_t opitch;
gfx_coord_t x, y;
/* Compute new rectangle enveloping current rectangle and new pixel */
prect.p0 = *pos;
prect.p1.x = prect.p0.x + 1;
prect.p1.y = prect.p0.y + 1;
gfx_rect_envelope(&bmp->rect, &prect, &nrect);
/* Allocate new pixel array */
npixels = calloc(sizeof(int), (nrect.p1.x - nrect.p0.x) *
(nrect.p1.y - nrect.p0.y));
if (npixels == NULL)
return ENOMEM;
/* Transfer pixel data */
opitch = bmp->rect.p1.x - bmp->rect.p0.x;
npitch = nrect.p1.x - nrect.p0.x;
for (y = bmp->rect.p0.y; y < bmp->rect.p1.y; y++) {
for (x = bmp->rect.p0.x; x < bmp->rect.p1.x; x++) {
npixels[(y - nrect.p0.y) * npitch + x - nrect.p0.x] =
bmp->pixels[(y - bmp->rect.p0.y) * opitch +
x - bmp->rect.p0.x];
}
}
/* Switch new and old data */
free(bmp->pixels);
bmp->pixels = npixels;
bmp->rect = nrect;
return EOK;
}
/** @}
*/