/* Create random image for testing purposes */
static pixman_image_t *
create_random_image (pixman_format_code_t *allowed_formats,
int max_width,
int max_height,
int max_extra_stride,
pixman_format_code_t *used_fmt)
{
int n = 0, i, width, height, stride;
pixman_format_code_t fmt;
uint32_t *buf;
pixman_image_t *img;
while (allowed_formats[n] != PIXMAN_null)
n++;
if (n > N_MOST_LIKELY_FORMATS && lcg_rand_n (4) != 0)
n = N_MOST_LIKELY_FORMATS;
fmt = allowed_formats[lcg_rand_n (n)];
width = lcg_rand_n (max_width) + 1;
height = lcg_rand_n (max_height) + 1;
stride = (width * PIXMAN_FORMAT_BPP (fmt) + 7) / 8 +
lcg_rand_n (max_extra_stride + 1);
stride = (stride + 3) & ~3;
/* do the allocation */
buf = aligned_malloc (64, stride * height);
/* initialize image with random data */
for (i = 0; i < stride * height; i++)
{
/* generation is biased to having more 0 or 255 bytes as
* they are more likely to be special-cased in code
*/
*((uint8_t *)buf + i) = lcg_rand_n (4) ? lcg_rand_n (256) :
(lcg_rand_n (2) ? 0 : 255);
}
img = pixman_image_create_bits (fmt, width, height, buf, stride);
if (PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_COLOR)
{
pixman_image_set_indexed (img, &(rgb_palette[PIXMAN_FORMAT_BPP (fmt)]));
}
else if (PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_GRAY)
{
pixman_image_set_indexed (img, &(y_palette[PIXMAN_FORMAT_BPP (fmt)]));
}
image_endian_swap (img);
if (used_fmt) *used_fmt = fmt;
return img;
}
/* Free random image, and optionally update crc32 based on its data */
static uint32_t
free_random_image (uint32_t initcrc,
pixman_image_t *img,
pixman_format_code_t fmt)
{
uint32_t crc32 = 0;
int stride = pixman_image_get_stride (img);
uint32_t *data = pixman_image_get_data (img);
int height = pixman_image_get_height (img);
if (fmt != PIXMAN_null)
{
/* mask unused 'x' part */
if (PIXMAN_FORMAT_BPP (fmt) - PIXMAN_FORMAT_DEPTH (fmt) &&
PIXMAN_FORMAT_DEPTH (fmt) != 0)
{
int i;
uint32_t *data = pixman_image_get_data (img);
uint32_t mask = (1 << PIXMAN_FORMAT_DEPTH (fmt)) - 1;
if (PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_BGRA ||
PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_RGBA)
{
mask <<= (PIXMAN_FORMAT_BPP (fmt) - PIXMAN_FORMAT_DEPTH (fmt));
}
for (i = 0; i < 32; i++)
mask |= mask << (i * PIXMAN_FORMAT_BPP (fmt));
for (i = 0; i < stride * height / 4; i++)
data[i] &= mask;
}
/* swap endiannes in order to provide identical results on both big
* and litte endian systems
*/
image_endian_swap (img);
crc32 = compute_crc32 (initcrc, data, stride * height);
}
pixman_image_unref (img);
free (data);
return crc32;
}
PixelFormat qemu_pixelformat_from_pixman(pixman_format_code_t format)
{
PixelFormat pf;
uint8_t bpp;
bpp = pf.bits_per_pixel = PIXMAN_FORMAT_BPP(format);
pf.bytes_per_pixel = PIXMAN_FORMAT_BPP(format) / 8;
pf.depth = PIXMAN_FORMAT_DEPTH(format);
pf.abits = PIXMAN_FORMAT_A(format);
pf.rbits = PIXMAN_FORMAT_R(format);
pf.gbits = PIXMAN_FORMAT_G(format);
pf.bbits = PIXMAN_FORMAT_B(format);
switch (PIXMAN_FORMAT_TYPE(format)) {
case PIXMAN_TYPE_ARGB:
pf.ashift = pf.bbits + pf.gbits + pf.rbits;
pf.rshift = pf.bbits + pf.gbits;
pf.gshift = pf.bbits;
pf.bshift = 0;
break;
case PIXMAN_TYPE_ABGR:
pf.ashift = pf.rbits + pf.gbits + pf.bbits;
pf.bshift = pf.rbits + pf.gbits;
pf.gshift = pf.rbits;
pf.rshift = 0;
break;
case PIXMAN_TYPE_BGRA:
pf.bshift = bpp - pf.bbits;
pf.gshift = bpp - (pf.bbits + pf.gbits);
pf.rshift = bpp - (pf.bbits + pf.gbits + pf.rbits);
pf.ashift = 0;
break;
case PIXMAN_TYPE_RGBA:
pf.rshift = bpp - pf.rbits;
pf.gshift = bpp - (pf.rbits + pf.gbits);
pf.bshift = bpp - (pf.rbits + pf.gbits + pf.bbits);
pf.ashift = 0;
break;
default:
g_assert_not_reached();
break;
}
pf.amax = (1 << pf.abits) - 1;
pf.rmax = (1 << pf.rbits) - 1;
pf.gmax = (1 << pf.gbits) - 1;
pf.bmax = (1 << pf.bbits) - 1;
pf.amask = pf.amax << pf.ashift;
pf.rmask = pf.rmax << pf.rshift;
pf.gmask = pf.gmax << pf.gshift;
pf.bmask = pf.bmax << pf.bshift;
return pf;
}
cairo_bool_t
_pixman_format_to_masks (pixman_format_code_t format,
cairo_format_masks_t *masks)
{
int a, r, g, b;
masks->bpp = PIXMAN_FORMAT_BPP (format);
/* Number of bits in each channel */
a = PIXMAN_FORMAT_A (format);
r = PIXMAN_FORMAT_R (format);
g = PIXMAN_FORMAT_G (format);
b = PIXMAN_FORMAT_B (format);
switch (PIXMAN_FORMAT_TYPE (format)) {
case PIXMAN_TYPE_ARGB:
masks->alpha_mask = MASK (a) << (r + g + b);
masks->red_mask = MASK (r) << (g + b);
masks->green_mask = MASK (g) << (b);
masks->blue_mask = MASK (b);
return TRUE;
case PIXMAN_TYPE_ABGR:
masks->alpha_mask = MASK (a) << (b + g + r);
masks->blue_mask = MASK (b) << (g + r);
masks->green_mask = MASK (g) << (r);
masks->red_mask = MASK (r);
return TRUE;
#ifdef PIXMAN_TYPE_BGRA
case PIXMAN_TYPE_BGRA:
masks->blue_mask = MASK (b) << (masks->bpp - b);
masks->green_mask = MASK (g) << (masks->bpp - b - g);
masks->red_mask = MASK (r) << (masks->bpp - b - g - r);
masks->alpha_mask = MASK (a);
return TRUE;
#endif
case PIXMAN_TYPE_A:
masks->alpha_mask = MASK (a);
masks->red_mask = 0;
masks->green_mask = 0;
masks->blue_mask = 0;
return TRUE;
case PIXMAN_TYPE_OTHER:
case PIXMAN_TYPE_COLOR:
case PIXMAN_TYPE_GRAY:
case PIXMAN_TYPE_YUY2:
case PIXMAN_TYPE_YV12:
default:
masks->alpha_mask = 0;
masks->red_mask = 0;
masks->green_mask = 0;
masks->blue_mask = 0;
return FALSE;
}
}
static force_inline void
get_shifts (pixman_format_code_t format,
int *a,
int *r,
int *g,
int *b)
{
switch (PIXMAN_FORMAT_TYPE (format))
{
case PIXMAN_TYPE_A:
*b = 0;
*g = 0;
*r = 0;
*a = 0;
break;
case PIXMAN_TYPE_ARGB:
case PIXMAN_TYPE_ARGB_SRGB:
*b = 0;
*g = *b + PIXMAN_FORMAT_B (format);
*r = *g + PIXMAN_FORMAT_G (format);
*a = *r + PIXMAN_FORMAT_R (format);
break;
case PIXMAN_TYPE_ABGR:
*r = 0;
*g = *r + PIXMAN_FORMAT_R (format);
*b = *g + PIXMAN_FORMAT_G (format);
*a = *b + PIXMAN_FORMAT_B (format);
break;
case PIXMAN_TYPE_BGRA:
/* With BGRA formats we start counting at the high end of the pixel */
*b = PIXMAN_FORMAT_BPP (format) - PIXMAN_FORMAT_B (format);
*g = *b - PIXMAN_FORMAT_B (format);
*r = *g - PIXMAN_FORMAT_G (format);
*a = *r - PIXMAN_FORMAT_R (format);
break;
case PIXMAN_TYPE_RGBA:
/* With BGRA formats we start counting at the high end of the pixel */
*r = PIXMAN_FORMAT_BPP (format) - PIXMAN_FORMAT_R (format);
*g = *r - PIXMAN_FORMAT_R (format);
*b = *g - PIXMAN_FORMAT_G (format);
*a = *b - PIXMAN_FORMAT_B (format);
break;
default:
assert (0);
break;
}
}
/* Create random image for testing purposes */
static pixman_image_t *
create_random_image (pixman_format_code_t *allowed_formats,
int max_width,
int max_height,
int max_extra_stride,
pixman_format_code_t *used_fmt)
{
int n = 0, width, height, stride;
pixman_format_code_t fmt;
uint32_t *buf;
pixman_image_t *img;
while (allowed_formats[n] != PIXMAN_null)
n++;
if (n > N_MOST_LIKELY_FORMATS && prng_rand_n (4) != 0)
n = N_MOST_LIKELY_FORMATS;
fmt = allowed_formats[prng_rand_n (n)];
width = prng_rand_n (max_width) + 1;
height = prng_rand_n (max_height) + 1;
stride = (width * PIXMAN_FORMAT_BPP (fmt) + 7) / 8 +
prng_rand_n (max_extra_stride + 1);
stride = (stride + 3) & ~3;
/* do the allocation */
buf = aligned_malloc (64, stride * height);
if (prng_rand_n (4) == 0)
{
/* uniform distribution */
prng_randmemset (buf, stride * height, 0);
}
else
{
/* significantly increased probability for 0x00 and 0xFF */
prng_randmemset (buf, stride * height, RANDMEMSET_MORE_00_AND_FF);
}
/* test negative stride */
if (prng_rand_n (4) == 0)
{
buf += (stride / 4) * (height - 1);
stride = - stride;
}
img = pixman_image_create_bits (fmt, width, height, buf, stride);
if (PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_COLOR)
{
pixman_image_set_indexed (img, &(rgb_palette[PIXMAN_FORMAT_BPP (fmt)]));
}
else if (PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_GRAY)
{
pixman_image_set_indexed (img, &(y_palette[PIXMAN_FORMAT_BPP (fmt)]));
}
if (prng_rand_n (16) == 0)
pixman_image_set_filter (img, PIXMAN_FILTER_BILINEAR, NULL, 0);
image_endian_swap (img);
if (used_fmt) *used_fmt = fmt;
return img;
}
/*
* pixman_composite_trapezoids()
*
* All the trapezoids are conceptually rendered to an infinitely big image.
* The (0, 0) coordinates of this image are then aligned with the (x, y)
* coordinates of the source image, and then both images are aligned with
* the (x, y) coordinates of the destination. Then these three images are
* composited across the entire destination.
*/
PIXMAN_EXPORT void
pixman_composite_trapezoids (pixman_op_t op,
pixman_image_t * src,
pixman_image_t * dst,
pixman_format_code_t mask_format,
int x_src,
int y_src,
int x_dst,
int y_dst,
int n_traps,
const pixman_trapezoid_t * traps)
{
int i;
return_if_fail (PIXMAN_FORMAT_TYPE (mask_format) == PIXMAN_TYPE_A);
if (n_traps <= 0)
return;
_pixman_image_validate (src);
_pixman_image_validate (dst);
if (op == PIXMAN_OP_ADD &&
(src->common.flags & FAST_PATH_IS_OPAQUE) &&
(mask_format == dst->common.extended_format_code) &&
!(dst->common.have_clip_region))
{
for (i = 0; i < n_traps; ++i)
{
const pixman_trapezoid_t *trap = &(traps[i]);
if (!pixman_trapezoid_valid (trap))
continue;
pixman_rasterize_trapezoid (dst, trap, x_dst, y_dst);
}
}
else
{
pixman_image_t *tmp;
pixman_box32_t box;
int i;
if (!get_trap_extents (op, dst, traps, n_traps, &box))
return;
if (!(tmp = pixman_image_create_bits (
mask_format, box.x2 - box.x1, box.y2 - box.y1, NULL, -1)))
return;
for (i = 0; i < n_traps; ++i)
{
const pixman_trapezoid_t *trap = &(traps[i]);
if (!pixman_trapezoid_valid (trap))
continue;
pixman_rasterize_trapezoid (tmp, trap, - box.x1, - box.y1);
}
pixman_image_composite (op, src, tmp, dst,
x_src + box.x1, y_src + box.y1,
0, 0,
x_dst + box.x1, y_dst + box.y1,
box.x2 - box.x1, box.y2 - box.y1);
pixman_image_unref (tmp);
}
}
