void art_draw_transformed_rgba_image(art_buffer_p dest_buffer,
unsigned char *src_buffer, int src_width,
int src_height, int dest_x, int dest_y,
float angle, float scale)
{
double affine[6];
affine[0] = scale * cos(angle);
affine[1] = -scale * sin(angle);
affine[2] = scale * sin(angle);
affine[3] = scale * cos(angle);
affine[4] = dest_x - src_height * scale * sin(angle);
affine[5] = dest_buffer->height - dest_y - src_height * scale * cos(angle);
art_rgb_rgba_affine(dest_buffer->buffer, 0, 0, dest_buffer->width,
dest_buffer->height, dest_buffer->width * 3,
(art_u8 *)src_buffer, src_width, src_height,
src_width * 4, affine, ART_FILTER_NEAREST, NULL);
}
void art_draw_rgba_image(art_buffer_p dest_buffer, int dest_x, int dest_y,
int dest_width, int dest_height,
unsigned char *src_buffer, int src_width,
int src_height)
{
double affine[6];
affine[0] = dest_width / (float)src_width;
affine[1] = 0;
affine[2] = 0;
affine[3] = dest_height / (float)src_height;
affine[4] = dest_x;
affine[5] = dest_buffer->height - dest_y - dest_height;
art_rgb_rgba_affine(dest_buffer->buffer, 0, 0, dest_buffer->width,
dest_buffer->height, dest_buffer->width * 3,
(art_u8 *)src_buffer, src_width, src_height,
src_width * 3, affine, ART_FILTER_NEAREST, NULL);
}
/**
* art_rgb_pixbuf_affine: Affine transform source RGB pixbuf and composite.
* @dst: Destination image RGB buffer.
* @x0: Left coordinate of destination rectangle.
* @y0: Top coordinate of destination rectangle.
* @x1: Right coordinate of destination rectangle.
* @y1: Bottom coordinate of destination rectangle.
* @dst_rowstride: Rowstride of @dst buffer.
* @pixbuf: source image pixbuf.
* @affine: Affine transform.
* @level: Filter level.
* @alphagamma: #ArtAlphaGamma for gamma-correcting the compositing.
*
* Affine transform the source image stored in @src, compositing over
* the area of destination image @dst specified by the rectangle
* (@x0, @y0) - (@x1, @y1). As usual in libart, the left and top edges
* of this rectangle are included, and the right and bottom edges are
* excluded.
*
* The @alphagamma parameter specifies that the alpha compositing be
* done in a gamma-corrected color space. In the current
* implementation, it is ignored.
*
* The @level parameter specifies the speed/quality tradeoff of the
* image interpolation. Currently, only ART_FILTER_NEAREST is
* implemented.
**/
void
art_rgb_pixbuf_affine (art_u8 *dst,
int x0, int y0, int x1, int y1, int dst_rowstride,
const ArtPixBuf *pixbuf,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma)
{
if (pixbuf->format != ART_PIX_RGB)
{
art_warn ("art_rgb_pixbuf_affine: need RGB format image\n");
return;
}
if (pixbuf->bits_per_sample != 8)
{
art_warn ("art_rgb_pixbuf_affine: need 8-bit sample data\n");
return;
}
if (pixbuf->n_channels != 3 + (pixbuf->has_alpha != 0))
{
art_warn ("art_rgb_pixbuf_affine: need 8-bit sample data\n");
return;
}
if (pixbuf->has_alpha)
art_rgb_rgba_affine (dst, x0, y0, x1, y1, dst_rowstride,
pixbuf->pixels,
pixbuf->width, pixbuf->height, pixbuf->rowstride,
affine,
level,
alphagamma);
else
art_rgb_affine (dst, x0, y0, x1, y1, dst_rowstride,
pixbuf->pixels,
pixbuf->width, pixbuf->height, pixbuf->rowstride,
affine,
level,
alphagamma);
}
static void
make_testpat (void)
{
ArtVpath *vpath, *vpath2, *vpath3;
ArtSVP *svp, *svp2;
ArtSVP *svp3;
art_u8 buf[512 * 512 * BYTES_PP];
int i, j;
int iter;
art_u8 colorimg[256][256][3];
art_u8 rgbaimg[256][256][4];
art_u8 bitimg[16][2];
int x, y;
double affine[6];
double affine2[6];
double affine3[6];
ArtAlphaGamma *alphagamma;
double dash_data[] = { 20 };
ArtVpathDash dash;
dash.offset = 0;
dash.n_dash = 1;
dash.dash = dash_data;
#ifdef TEST_AFFINE
test_affine ();
exit (0);
#endif
vpath = randstar (50);
svp = art_svp_from_vpath (vpath);
art_free (vpath);
vpath2 = randstar (50);
#if 1
vpath3 = art_vpath_dash (vpath2, &dash);
art_free (vpath2);
svp2 = art_svp_vpath_stroke (vpath3,
ART_PATH_STROKE_JOIN_MITER,
ART_PATH_STROKE_CAP_BUTT,
15,
4,
0.5);
art_free (vpath3);
#else
svp2 = art_svp_from_vpath (vpath2);
#endif
#if 1
svp3 = art_svp_intersect (svp, svp2);
#else
svp3 = svp2;
#endif
#if 0
print_svp (svp);
#endif
for (y = 0; y < 256; y++)
for (x = 0; x < 256; x++)
{
colorimg[y][x][0] = (x + y) >> 1;
colorimg[y][x][1] = (x + (255 - y)) >> 1;
colorimg[y][x][2] = ((255 - x) + y) >> 1;
rgbaimg[y][x][0] = (x + y) >> 1;
rgbaimg[y][x][1] = (x + (255 - y)) >> 1;
rgbaimg[y][x][2] = ((255 - x) + y) >> 1;
rgbaimg[y][x][3] = y;
}
for (y = 0; y < 16; y++)
for (x = 0; x < 2; x++)
bitimg[y][x] = (x << 4) | y;
affine[0] = 0.5;
affine[1] = .2;
affine[2] = -.2;
affine[3] = 0.5;
affine[4] = 64;
affine[5] = 64;
affine2[0] = 1;
affine2[1] = -.2;
affine2[2] = .2;
affine2[3] = 1;
affine2[4] = 128;
affine2[5] = 128;
affine3[0] = 5;
affine3[1] = -.2;
affine3[2] = .2;
affine3[3] = 5;
affine3[4] = 384;
affine3[5] = 32;
#if 0
alphagamma = art_alphagamma_new (1.8);
#else
alphagamma = NULL;
#endif
#ifdef COLOR
printf ("P6\n512 512\n255\n");
#else
printf ("P5\n512 512\n255\n");
#endif
for (iter = 0; iter < NUM_ITERS; iter++)
for (j = 0; j < 512; j += TILE_SIZE)
for (i = 0; i < 512; i += TILE_SIZE)
{
#ifdef COLOR
art_rgb_svp_aa (svp, i, j, i + TILE_SIZE, j + TILE_SIZE,
0xffe0a0, 0x100040,
buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP,
alphagamma);
art_rgb_svp_alpha (svp2, i, j, i + TILE_SIZE, j + TILE_SIZE,
0xff000080,
buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP,
alphagamma);
art_rgb_svp_alpha (svp3, i, j, i + TILE_SIZE, j + TILE_SIZE,
0x00ff0080,
buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP,
alphagamma);
art_rgb_affine (buf + (j * 512 + i) * BYTES_PP,
i, j, i + TILE_SIZE, j + TILE_SIZE, 512 * BYTES_PP,
(art_u8 *)colorimg, 256, 256, 256 * 3,
affine,
ART_FILTER_NEAREST, alphagamma);
art_rgb_rgba_affine (buf + (j * 512 + i) * BYTES_PP,
i, j, i + TILE_SIZE, j + TILE_SIZE,
512 * BYTES_PP,
(art_u8 *)rgbaimg, 256, 256, 256 * 4,
affine2,
ART_FILTER_NEAREST, alphagamma);
art_rgb_bitmap_affine (buf + (j * 512 + i) * BYTES_PP,
i, j, i + TILE_SIZE, j + TILE_SIZE,
512 * BYTES_PP,
(art_u8 *)bitimg, 16, 16, 2,
0xffff00ff,
affine3,
ART_FILTER_NEAREST, alphagamma);
#else
art_gray_svp_aa (svp, i, j, i + TILE_SIZE, j + TILE_SIZE,
buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP);
#endif
}
art_svp_free (svp2);
art_svp_free (svp3);
art_svp_free (svp);
#if 1
fwrite (buf, 1, 512 * 512 * BYTES_PP, stdout);
#endif
}
