HelenOS sources

root/uspace/lib/gfxfont/test/glyph_bmp.c

DEFINITIONS

1. PCUT_TEST
2. PCUT_TEST
3. PCUT_TEST
4. PCUT_TEST
5. PCUT_TEST
6. PCUT_TEST
7. PCUT_TEST
8. testgc_set_clip_rect
9. testgc_set_color
10. testgc_fill_rect
11. testgc_bitmap_create
12. testgc_bitmap_destroy
13. testgc_bitmap_render
14. testgc_bitmap_get_alloc

/*
 * Copyright (c) 2021 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.
 */

#include <gfx/context.h>
#include <gfx/font.h>
#include <gfx/glyph.h>
#include <gfx/glyph_bmp.h>
#include <gfx/typeface.h>
#include <pcut/pcut.h>
#include "../private/glyph_bmp.h"

PCUT_INIT;

PCUT_TEST_SUITE(glyph_bmp);

static errno_t testgc_set_clip_rect(void *, gfx_rect_t *);
static errno_t testgc_set_color(void *, gfx_color_t *);
static errno_t testgc_fill_rect(void *, gfx_rect_t *);
static errno_t testgc_bitmap_create(void *, gfx_bitmap_params_t *,
    gfx_bitmap_alloc_t *, void **);
static errno_t testgc_bitmap_destroy(void *);
static errno_t testgc_bitmap_render(void *, gfx_rect_t *, gfx_coord2_t *);
static errno_t testgc_bitmap_get_alloc(void *, gfx_bitmap_alloc_t *);

static gfx_context_ops_t test_ops = {
        .set_clip_rect = testgc_set_clip_rect,
        .set_color = testgc_set_color,
        .fill_rect = testgc_fill_rect,
        .bitmap_create = testgc_bitmap_create,
        .bitmap_destroy = testgc_bitmap_destroy,
        .bitmap_render = testgc_bitmap_render,
        .bitmap_get_alloc = testgc_bitmap_get_alloc
};

typedef struct {
        gfx_bitmap_params_t bm_params;
        void *bm_pixels;
        gfx_rect_t bm_srect;
        gfx_coord2_t bm_offs;
} test_gc_t;

typedef struct {
        test_gc_t *tgc;
        gfx_bitmap_alloc_t alloc;
        bool myalloc;
} testgc_bitmap_t;

/** Test opening and closing glyph bitmap */
PCUT_TEST(open_close)
{
        gfx_font_props_t fprops;
        gfx_font_metrics_t fmetrics;
        gfx_typeface_t *tface;
        gfx_font_t *font;
        gfx_glyph_metrics_t gmetrics;
        gfx_glyph_t *glyph;
        gfx_context_t *gc;
        gfx_glyph_bmp_t *bmp;
        test_gc_t tgc;
        errno_t rc;

        rc = gfx_context_new(&test_ops, (void *) &tgc, &gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_typeface_create(gc, &tface);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_font_props_init(&fprops);
        gfx_font_metrics_init(&fmetrics);
        rc = gfx_font_create(tface, &fprops, &fmetrics, &font);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_glyph_metrics_init(&gmetrics);
        gmetrics.advance = 1;

        rc = gfx_glyph_create(font, &gmetrics, &glyph);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        bmp = NULL;

        rc = gfx_glyph_bmp_open(glyph, &bmp);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
        PCUT_ASSERT_NOT_NULL(bmp);

        gfx_glyph_bmp_close(bmp);

        gfx_glyph_destroy(glyph);

        gfx_font_close(font);
        gfx_typeface_destroy(tface);
        rc = gfx_context_delete(gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
}

/** Test glyph_bmp_save() */
PCUT_TEST(save)
{
        gfx_font_props_t fprops;
        gfx_font_metrics_t fmetrics;
        gfx_typeface_t *tface;
        gfx_font_t *font;
        gfx_glyph_metrics_t gmetrics;
        gfx_glyph_t *glyph;
        gfx_context_t *gc;
        gfx_glyph_bmp_t *bmp;
        int pix;
        test_gc_t tgc;
        errno_t rc;

        rc = gfx_context_new(&test_ops, (void *) &tgc, &gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_typeface_create(gc, &tface);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_font_props_init(&fprops);
        gfx_font_metrics_init(&fmetrics);
        rc = gfx_font_create(tface, &fprops, &fmetrics, &font);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_glyph_metrics_init(&gmetrics);
        gmetrics.advance = 1;

        rc = gfx_glyph_create(font, &gmetrics, &glyph);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        bmp = NULL;

        /* Open bitmap and set some pixels */

        rc = gfx_glyph_bmp_open(glyph, &bmp);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
        PCUT_ASSERT_NOT_NULL(bmp);

        rc = gfx_glyph_bmp_setpix(bmp, 0, 0, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_setpix(bmp, 1, 1, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_save(bmp);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_glyph_bmp_close(bmp);
        bmp = NULL;

        /* Re-open the saved bimap and verify pixel values were preserved */

        rc = gfx_glyph_bmp_open(glyph, &bmp);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
        PCUT_ASSERT_NOT_NULL(bmp);

        pix = gfx_glyph_bmp_getpix(bmp, 0, 0);
        PCUT_ASSERT_INT_EQUALS(1, pix);

        pix = gfx_glyph_bmp_getpix(bmp, 1, 1);
        PCUT_ASSERT_INT_EQUALS(1, pix);

        pix = gfx_glyph_bmp_getpix(bmp, 1, 0);
        PCUT_ASSERT_INT_EQUALS(0, pix);

        pix = gfx_glyph_bmp_getpix(bmp, 0, 1);
        PCUT_ASSERT_INT_EQUALS(0, pix);

        /* ... */

        rc = gfx_glyph_bmp_setpix(bmp, 1, -1, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_save(bmp);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_glyph_bmp_close(bmp);

        /* Once again */

        rc = gfx_glyph_bmp_open(glyph, &bmp);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
        PCUT_ASSERT_NOT_NULL(bmp);

        pix = gfx_glyph_bmp_getpix(bmp, 0, 0);
        PCUT_ASSERT_INT_EQUALS(1, pix);

        pix = gfx_glyph_bmp_getpix(bmp, 1, 1);
        PCUT_ASSERT_INT_EQUALS(1, pix);

        pix = gfx_glyph_bmp_getpix(bmp, 1, 0);
        PCUT_ASSERT_INT_EQUALS(0, pix);

        pix = gfx_glyph_bmp_getpix(bmp, 0, 1);
        PCUT_ASSERT_INT_EQUALS(0, pix);

        pix = gfx_glyph_bmp_getpix(bmp, 1, -1);
        PCUT_ASSERT_INT_EQUALS(1, pix);

        pix = gfx_glyph_bmp_getpix(bmp, 0, -1);
        PCUT_ASSERT_INT_EQUALS(0, pix);

        gfx_glyph_destroy(glyph);

        gfx_font_close(font);
        gfx_typeface_destroy(tface);
        rc = gfx_context_delete(gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
}

/** Test glyph_bmp_getpix() */
PCUT_TEST(getpix)
{
        gfx_font_props_t fprops;
        gfx_font_metrics_t fmetrics;
        gfx_typeface_t *tface;
        gfx_font_t *font;
        gfx_glyph_metrics_t gmetrics;
        gfx_glyph_t *glyph;
        gfx_context_t *gc;
        gfx_glyph_bmp_t *bmp;
        test_gc_t tgc;
        int pix;
        errno_t rc;

        rc = gfx_context_new(&test_ops, (void *) &tgc, &gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_typeface_create(gc, &tface);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_font_props_init(&fprops);
        gfx_font_metrics_init(&fmetrics);
        rc = gfx_font_create(tface, &fprops, &fmetrics, &font);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_glyph_metrics_init(&gmetrics);
        gmetrics.advance = 1;

        rc = gfx_glyph_create(font, &gmetrics, &glyph);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        bmp = NULL;

        rc = gfx_glyph_bmp_open(glyph, &bmp);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
        PCUT_ASSERT_NOT_NULL(bmp);

        pix = gfx_glyph_bmp_getpix(bmp, 0, 0);
        PCUT_ASSERT_INT_EQUALS(0, pix);

        gfx_glyph_bmp_close(bmp);

        gfx_glyph_destroy(glyph);

        gfx_font_close(font);
        gfx_typeface_destroy(tface);
        rc = gfx_context_delete(gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
}

/** Test glyph_bmp_setpix() can flip pixel value both ways */
PCUT_TEST(setpix_flip)
{
        gfx_font_props_t fprops;
        gfx_font_metrics_t fmetrics;
        gfx_typeface_t *tface;
        gfx_font_t *font;
        gfx_glyph_metrics_t gmetrics;
        gfx_glyph_t *glyph;
        gfx_context_t *gc;
        gfx_glyph_bmp_t *bmp;
        test_gc_t tgc;
        int pix;
        errno_t rc;

        rc = gfx_context_new(&test_ops, (void *) &tgc, &gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_typeface_create(gc, &tface);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_font_props_init(&fprops);
        gfx_font_metrics_init(&fmetrics);
        rc = gfx_font_create(tface, &fprops, &fmetrics, &font);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_glyph_metrics_init(&gmetrics);
        gmetrics.advance = 1;

        rc = gfx_glyph_create(font, &gmetrics, &glyph);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        bmp = NULL;

        rc = gfx_glyph_bmp_open(glyph, &bmp);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
        PCUT_ASSERT_NOT_NULL(bmp);

        pix = gfx_glyph_bmp_getpix(bmp, 0, 0);
        PCUT_ASSERT_INT_EQUALS(0, pix);

        rc = gfx_glyph_bmp_setpix(bmp, 0, 0, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        pix = gfx_glyph_bmp_getpix(bmp, 0, 0);
        PCUT_ASSERT_INT_EQUALS(1, pix);

        rc = gfx_glyph_bmp_setpix(bmp, 0, 0, 0);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        pix = gfx_glyph_bmp_getpix(bmp, 0, 0);
        PCUT_ASSERT_INT_EQUALS(0, pix);

        gfx_glyph_bmp_close(bmp);

        gfx_glyph_destroy(glyph);

        gfx_font_close(font);
        gfx_typeface_destroy(tface);
        rc = gfx_context_delete(gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
}

/** Test glyph_bmp_setpix() properly extends pixel array */
PCUT_TEST(setpix_extend)
{
        gfx_font_props_t fprops;
        gfx_font_metrics_t fmetrics;
        gfx_typeface_t *tface;
        gfx_font_t *font;
        gfx_glyph_metrics_t gmetrics;
        gfx_glyph_t *glyph;
        gfx_context_t *gc;
        gfx_glyph_bmp_t *bmp;
        gfx_coord_t x, y;
        test_gc_t tgc;
        int pix;
        errno_t rc;

        rc = gfx_context_new(&test_ops, (void *) &tgc, &gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_typeface_create(gc, &tface);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_font_props_init(&fprops);
        gfx_font_metrics_init(&fmetrics);
        rc = gfx_font_create(tface, &fprops, &fmetrics, &font);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_glyph_metrics_init(&gmetrics);
        gmetrics.advance = 1;

        rc = gfx_glyph_create(font, &gmetrics, &glyph);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        bmp = NULL;

        rc = gfx_glyph_bmp_open(glyph, &bmp);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
        PCUT_ASSERT_NOT_NULL(bmp);

        /*
         * Fill the rectangle [0, 0]..[3, 3] with alternating pixel pattern
         * and then check it.
         */

        rc = gfx_glyph_bmp_setpix(bmp, 0, 0, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_setpix(bmp, 1, 1, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_setpix(bmp, 2, 0, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_setpix(bmp, 0, 2, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_setpix(bmp, 2, 2, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        for (y = 0; y <= 2; y++) {
                for (x = 0; x <= 2; x++) {
                        pix = gfx_glyph_bmp_getpix(bmp, x, y);
                        PCUT_ASSERT_INT_EQUALS((x & 1) ^ (y & 1) ^ 1, pix);
                }
        }

        gfx_glyph_bmp_close(bmp);

        gfx_glyph_destroy(glyph);

        gfx_font_close(font);
        gfx_typeface_destroy(tface);
        rc = gfx_context_delete(gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
}

/** Test glyph_bmp_clear() properly clears bitmap */
PCUT_TEST(clear)
{
        gfx_font_props_t fprops;
        gfx_font_metrics_t fmetrics;
        gfx_typeface_t *tface;
        gfx_font_t *font;
        gfx_glyph_metrics_t gmetrics;
        gfx_glyph_t *glyph;
        gfx_context_t *gc;
        gfx_glyph_bmp_t *bmp;
        gfx_rect_t rect;
        test_gc_t tgc;
        int pix;
        errno_t rc;

        rc = gfx_context_new(&test_ops, (void *) &tgc, &gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_typeface_create(gc, &tface);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_font_props_init(&fprops);
        gfx_font_metrics_init(&fmetrics);
        rc = gfx_font_create(tface, &fprops, &fmetrics, &font);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_glyph_metrics_init(&gmetrics);
        gmetrics.advance = 1;

        rc = gfx_glyph_create(font, &gmetrics, &glyph);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        bmp = NULL;

        rc = gfx_glyph_bmp_open(glyph, &bmp);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
        PCUT_ASSERT_NOT_NULL(bmp);

        /* Set some pixels */

        rc = gfx_glyph_bmp_setpix(bmp, 0, 0, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_setpix(bmp, 1, 1, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        /* Clear the bitmap and check */
        gfx_glyph_bmp_clear(bmp);

        gfx_glyph_bmp_get_rect(bmp, &rect);
        PCUT_ASSERT_INT_EQUALS(0, rect.p0.x);
        PCUT_ASSERT_INT_EQUALS(0, rect.p0.y);
        PCUT_ASSERT_INT_EQUALS(0, rect.p1.x);
        PCUT_ASSERT_INT_EQUALS(0, rect.p1.y);

        pix = gfx_glyph_bmp_getpix(bmp, 0, 0);
        PCUT_ASSERT_INT_EQUALS(0, pix);
        pix = gfx_glyph_bmp_getpix(bmp, 1, 1);
        PCUT_ASSERT_INT_EQUALS(0, pix);

        gfx_glyph_bmp_close(bmp);

        gfx_glyph_destroy(glyph);

        gfx_font_close(font);
        gfx_typeface_destroy(tface);
        rc = gfx_context_delete(gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
}

/** Test glyph_bmp_find_used_rect() find minimum used rectangle */
PCUT_TEST(find_used_rect)
{
        gfx_font_props_t fprops;
        gfx_font_metrics_t fmetrics;
        gfx_typeface_t *tface;
        gfx_font_t *font;
        gfx_glyph_metrics_t gmetrics;
        gfx_glyph_t *glyph;
        gfx_context_t *gc;
        gfx_glyph_bmp_t *bmp;
        gfx_rect_t rect;
        test_gc_t tgc;
        errno_t rc;

        rc = gfx_context_new(&test_ops, (void *) &tgc, &gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_typeface_create(gc, &tface);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_font_props_init(&fprops);
        gfx_font_metrics_init(&fmetrics);
        rc = gfx_font_create(tface, &fprops, &fmetrics, &font);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        gfx_glyph_metrics_init(&gmetrics);
        gmetrics.advance = 1;

        rc = gfx_glyph_create(font, &gmetrics, &glyph);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        bmp = NULL;

        rc = gfx_glyph_bmp_open(glyph, &bmp);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
        PCUT_ASSERT_NOT_NULL(bmp);

        /* Check used rectangle */

        gfx_glyph_bmp_find_used_rect(bmp, &rect);
        PCUT_ASSERT_INT_EQUALS(0, rect.p0.x);
        PCUT_ASSERT_INT_EQUALS(0, rect.p0.y);
        PCUT_ASSERT_INT_EQUALS(0, rect.p1.x);
        PCUT_ASSERT_INT_EQUALS(0, rect.p1.y);

        /* Set some pixels */

        rc = gfx_glyph_bmp_setpix(bmp, -4, -5, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_setpix(bmp, -2, -1, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_setpix(bmp, 3, 4, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_setpix(bmp, 7, 6, 1);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        /* Check used rectangle */

        gfx_glyph_bmp_find_used_rect(bmp, &rect);
        PCUT_ASSERT_INT_EQUALS(-4, rect.p0.x);
        PCUT_ASSERT_INT_EQUALS(-5, rect.p0.y);
        PCUT_ASSERT_INT_EQUALS(8, rect.p1.x);
        PCUT_ASSERT_INT_EQUALS(7, rect.p1.y);

        /* Clear the corner pixels */

        rc = gfx_glyph_bmp_setpix(bmp, -4, -5, 0);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        rc = gfx_glyph_bmp_setpix(bmp, 7, 6, 0);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);

        /* Check used rectangle got smaller */

        gfx_glyph_bmp_find_used_rect(bmp, &rect);
        PCUT_ASSERT_INT_EQUALS(-2, rect.p0.x);
        PCUT_ASSERT_INT_EQUALS(-1, rect.p0.y);
        PCUT_ASSERT_INT_EQUALS(4, rect.p1.x);
        PCUT_ASSERT_INT_EQUALS(5, rect.p1.y);

        gfx_glyph_bmp_close(bmp);

        gfx_glyph_destroy(glyph);

        gfx_font_close(font);
        gfx_typeface_destroy(tface);
        rc = gfx_context_delete(gc);
        PCUT_ASSERT_ERRNO_VAL(EOK, rc);
}

static errno_t testgc_set_clip_rect(void *arg, gfx_rect_t *rect)
{
        return EOK;
}

static errno_t testgc_set_color(void *arg, gfx_color_t *color)
{
        return EOK;
}

static errno_t testgc_fill_rect(void *arg, gfx_rect_t *rect)
{
        return EOK;
}

static errno_t testgc_bitmap_create(void *arg, gfx_bitmap_params_t *params,
    gfx_bitmap_alloc_t *alloc, void **rbm)
{
        test_gc_t *tgc = (test_gc_t *) arg;
        testgc_bitmap_t *tbm;

        tbm = calloc(1, sizeof(testgc_bitmap_t));
        if (tbm == NULL)
                return ENOMEM;

        if (alloc == NULL) {
                tbm->alloc.pitch = (params->rect.p1.x - params->rect.p0.x) *
                    sizeof(uint32_t);
                tbm->alloc.off0 = 0;
                tbm->alloc.pixels = calloc(sizeof(uint32_t),
                    tbm->alloc.pitch * (params->rect.p1.y - params->rect.p0.y));
                tbm->myalloc = true;
                if (tbm->alloc.pixels == NULL) {
                        free(tbm);
                        return ENOMEM;
                }
        } else {
                tbm->alloc = *alloc;
        }

        tbm->tgc = tgc;
        tgc->bm_params = *params;
        tgc->bm_pixels = tbm->alloc.pixels;
        *rbm = (void *)tbm;
        return EOK;
}

static errno_t testgc_bitmap_destroy(void *bm)
{
        testgc_bitmap_t *tbm = (testgc_bitmap_t *)bm;
        if (tbm->myalloc)
                free(tbm->alloc.pixels);
        free(tbm);
        return EOK;
}

static errno_t testgc_bitmap_render(void *bm, gfx_rect_t *srect,
    gfx_coord2_t *offs)
{
        testgc_bitmap_t *tbm = (testgc_bitmap_t *)bm;
        tbm->tgc->bm_srect = *srect;
        tbm->tgc->bm_offs = *offs;
        return EOK;
}

static errno_t testgc_bitmap_get_alloc(void *bm, gfx_bitmap_alloc_t *alloc)
{
        testgc_bitmap_t *tbm = (testgc_bitmap_t *)bm;
        *alloc = tbm->alloc;
        return EOK;
}

PCUT_EXPORT(glyph_bmp);