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kolibrios/programs/develop/libraries/pixman/pixman-bits-image.c
Sergey Semyonov (Serge) 4dd0483a93 pixman-1.0 
git-svn-id: svn://kolibrios.org@1891 a494cfbc-eb01-0410-851d-a64ba20cac60
2011-02-27 17:46:46 +00:00

1332 lines
33 KiB
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/*
* Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
* 2005 Lars Knoll & Zack Rusin, Trolltech
* 2008 Aaron Plattner, NVIDIA Corporation
* Copyright © 2000 SuSE, Inc.
* Copyright © 2007, 2009 Red Hat, Inc.
* Copyright © 2008 André Tupinambá <andrelrt@gmail.com>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "pixman-private.h"
#include "pixman-combine32.h"
/* Store functions */
void
_pixman_image_store_scanline_32 (bits_image_t * image,
int x,
int y,
int width,
const uint32_t *buffer)
{
image->store_scanline_32 (image, x, y, width, buffer);
if (image->common.alpha_map)
{
x -= image->common.alpha_origin_x;
y -= image->common.alpha_origin_y;
image->common.alpha_map->store_scanline_32 (
image->common.alpha_map, x, y, width, buffer);
}
}
void
_pixman_image_store_scanline_64 (bits_image_t * image,
int x,
int y,
int width,
const uint32_t *buffer)
{
image->store_scanline_64 (image, x, y, width, buffer);
if (image->common.alpha_map)
{
x -= image->common.alpha_origin_x;
y -= image->common.alpha_origin_y;
image->common.alpha_map->store_scanline_64 (
image->common.alpha_map, x, y, width, buffer);
}
}
/* Fetch functions */
static force_inline uint32_t
fetch_pixel_no_alpha (bits_image_t *image,
int x, int y, pixman_bool_t check_bounds)
{
if (check_bounds &&
(x < 0 || x >= image->width || y < 0 || y >= image->height))
{
return 0;
}
return image->fetch_pixel_32 (image, x, y);
}
typedef uint32_t (* get_pixel_t) (bits_image_t *image,
int x, int y, pixman_bool_t check_bounds);
static force_inline void
repeat (pixman_repeat_t repeat, int size, int *coord)
{
switch (repeat)
{
case PIXMAN_REPEAT_NORMAL:
*coord = MOD (*coord, size);
break;
case PIXMAN_REPEAT_PAD:
*coord = CLIP (*coord, 0, size - 1);
break;
case PIXMAN_REPEAT_REFLECT:
*coord = MOD (*coord, size * 2);
if (*coord >= size)
*coord = size * 2 - *coord - 1;
break;
case PIXMAN_REPEAT_NONE:
break;
default:
break;
}
}
static force_inline uint32_t
bits_image_fetch_pixel_nearest (bits_image_t *image,
pixman_fixed_t x,
pixman_fixed_t y,
get_pixel_t get_pixel)
{
int x0 = pixman_fixed_to_int (x - pixman_fixed_e);
int y0 = pixman_fixed_to_int (y - pixman_fixed_e);
if (image->common.repeat != PIXMAN_REPEAT_NONE)
{
repeat (image->common.repeat, image->width, &x0);
repeat (image->common.repeat, image->height, &y0);
return get_pixel (image, x0, y0, FALSE);
}
else
{
return get_pixel (image, x0, y0, TRUE);
}
}
#if SIZEOF_LONG > 4
static force_inline uint32_t
bilinear_interpolation (uint32_t tl, uint32_t tr,
uint32_t bl, uint32_t br,
int distx, int disty)
{
uint64_t distxy, distxiy, distixy, distixiy;
uint64_t tl64, tr64, bl64, br64;
uint64_t f, r;
distxy = distx * disty;
distxiy = distx * (256 - disty);
distixy = (256 - distx) * disty;
distixiy = (256 - distx) * (256 - disty);
/* Alpha and Blue */
tl64 = tl & 0xff0000ff;
tr64 = tr & 0xff0000ff;
bl64 = bl & 0xff0000ff;
br64 = br & 0xff0000ff;
f = tl64 * distixiy + tr64 * distxiy + bl64 * distixy + br64 * distxy;
r = f & 0x0000ff0000ff0000ull;
/* Red and Green */
tl64 = tl;
tl64 = ((tl64 << 16) & 0x000000ff00000000ull) | (tl64 & 0x0000ff00ull);
tr64 = tr;
tr64 = ((tr64 << 16) & 0x000000ff00000000ull) | (tr64 & 0x0000ff00ull);
bl64 = bl;
bl64 = ((bl64 << 16) & 0x000000ff00000000ull) | (bl64 & 0x0000ff00ull);
br64 = br;
br64 = ((br64 << 16) & 0x000000ff00000000ull) | (br64 & 0x0000ff00ull);
f = tl64 * distixiy + tr64 * distxiy + bl64 * distixy + br64 * distxy;
r |= ((f >> 16) & 0x000000ff00000000ull) | (f & 0xff000000ull);
return (uint32_t)(r >> 16);
}
#else
static force_inline uint32_t
bilinear_interpolation (uint32_t tl, uint32_t tr,
uint32_t bl, uint32_t br,
int distx, int disty)
{
int distxy, distxiy, distixy, distixiy;
uint32_t f, r;
distxy = distx * disty;
distxiy = (distx << 8) - distxy; /* distx * (256 - disty) */
distixy = (disty << 8) - distxy; /* disty * (256 - distx) */
distixiy =
256 * 256 - (disty << 8) -
(distx << 8) + distxy; /* (256 - distx) * (256 - disty) */
/* Blue */
r = (tl & 0x000000ff) * distixiy + (tr & 0x000000ff) * distxiy
+ (bl & 0x000000ff) * distixy + (br & 0x000000ff) * distxy;
/* Green */
f = (tl & 0x0000ff00) * distixiy + (tr & 0x0000ff00) * distxiy
+ (bl & 0x0000ff00) * distixy + (br & 0x0000ff00) * distxy;
r |= f & 0xff000000;
tl >>= 16;
tr >>= 16;
bl >>= 16;
br >>= 16;
r >>= 16;
/* Red */
f = (tl & 0x000000ff) * distixiy + (tr & 0x000000ff) * distxiy
+ (bl & 0x000000ff) * distixy + (br & 0x000000ff) * distxy;
r |= f & 0x00ff0000;
/* Alpha */
f = (tl & 0x0000ff00) * distixiy + (tr & 0x0000ff00) * distxiy
+ (bl & 0x0000ff00) * distixy + (br & 0x0000ff00) * distxy;
r |= f & 0xff000000;
return r;
}
#endif
static force_inline uint32_t
bits_image_fetch_pixel_bilinear (bits_image_t *image,
pixman_fixed_t x,
pixman_fixed_t y,
get_pixel_t get_pixel)
{
pixman_repeat_t repeat_mode = image->common.repeat;
int width = image->width;
int height = image->height;
int x1, y1, x2, y2;
uint32_t tl, tr, bl, br;
int32_t distx, disty;
x1 = x - pixman_fixed_1 / 2;
y1 = y - pixman_fixed_1 / 2;
distx = (x1 >> 8) & 0xff;
disty = (y1 >> 8) & 0xff;
x1 = pixman_fixed_to_int (x1);
y1 = pixman_fixed_to_int (y1);
x2 = x1 + 1;
y2 = y1 + 1;
if (repeat_mode != PIXMAN_REPEAT_NONE)
{
repeat (repeat_mode, width, &x1);
repeat (repeat_mode, height, &y1);
repeat (repeat_mode, width, &x2);
repeat (repeat_mode, height, &y2);
tl = get_pixel (image, x1, y1, FALSE);
bl = get_pixel (image, x1, y2, FALSE);
tr = get_pixel (image, x2, y1, FALSE);
br = get_pixel (image, x2, y2, FALSE);
}
else
{
tl = get_pixel (image, x1, y1, TRUE);
tr = get_pixel (image, x2, y1, TRUE);
bl = get_pixel (image, x1, y2, TRUE);
br = get_pixel (image, x2, y2, TRUE);
}
return bilinear_interpolation (tl, tr, bl, br, distx, disty);
}
static void
bits_image_fetch_bilinear_no_repeat_8888 (pixman_image_t * ima,
int offset,
int line,
int width,
uint32_t * buffer,
const uint32_t * mask)
{
bits_image_t *bits = &ima->bits;
pixman_fixed_t x_top, x_bottom, x;
pixman_fixed_t ux_top, ux_bottom, ux;
pixman_vector_t v;
uint32_t top_mask, bottom_mask;
uint32_t *top_row;
uint32_t *bottom_row;
uint32_t *end;
uint32_t zero[2] = { 0, 0 };
uint32_t one = 1;
int y, y1, y2;
int disty;
int mask_inc;
int w;
/* reference point is the center of the pixel */
v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2;
v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2;
v.vector[2] = pixman_fixed_1;
if (!pixman_transform_point_3d (bits->common.transform, &v))
return;
ux = ux_top = ux_bottom = bits->common.transform->matrix[0][0];
x = x_top = x_bottom = v.vector[0] - pixman_fixed_1/2;
y = v.vector[1] - pixman_fixed_1/2;
disty = (y >> 8) & 0xff;
/* Load the pointers to the first and second lines from the source
* image that bilinear code must read.
*
* The main trick in this code is about the check if any line are
* outside of the image;
*
* When I realize that a line (any one) is outside, I change
* the pointer to a dummy area with zeros. Once I change this, I
* must be sure the pointer will not change, so I set the
* variables to each pointer increments inside the loop.
*/
y1 = pixman_fixed_to_int (y);
y2 = y1 + 1;
if (y1 < 0 || y1 >= bits->height)
{
top_row = zero;
x_top = 0;
ux_top = 0;
}
else
{
top_row = bits->bits + y1 * bits->rowstride;
x_top = x;
ux_top = ux;
}
if (y2 < 0 || y2 >= bits->height)
{
bottom_row = zero;
x_bottom = 0;
ux_bottom = 0;
}
else
{
bottom_row = bits->bits + y2 * bits->rowstride;
x_bottom = x;
ux_bottom = ux;
}
/* Instead of checking whether the operation uses the mast in
* each loop iteration, verify this only once and prepare the
* variables to make the code smaller inside the loop.
*/
if (!mask)
{
mask_inc = 0;
mask = &one;
}
else
{
/* If have a mask, prepare the variables to check it */
mask_inc = 1;
}
/* If both are zero, then the whole thing is zero */
if (top_row == zero && bottom_row == zero)
{
memset (buffer, 0, width * sizeof (uint32_t));
return;
}
else if (bits->format == PIXMAN_x8r8g8b8)
{
if (top_row == zero)
{
top_mask = 0;
bottom_mask = 0xff000000;
}
else if (bottom_row == zero)
{
top_mask = 0xff000000;
bottom_mask = 0;
}
else
{
top_mask = 0xff000000;
bottom_mask = 0xff000000;
}
}
else
{
top_mask = 0;
bottom_mask = 0;
}
end = buffer + width;
/* Zero fill to the left of the image */
while (buffer < end && x < pixman_fixed_minus_1)
{
*buffer++ = 0;
x += ux;
x_top += ux_top;
x_bottom += ux_bottom;
mask += mask_inc;
}
/* Left edge
*/
while (buffer < end && x < 0)
{
uint32_t tr, br;
int32_t distx;
tr = top_row[pixman_fixed_to_int (x_top) + 1] | top_mask;
br = bottom_row[pixman_fixed_to_int (x_bottom) + 1] | bottom_mask;
distx = (x >> 8) & 0xff;
*buffer++ = bilinear_interpolation (0, tr, 0, br, distx, disty);
x += ux;
x_top += ux_top;
x_bottom += ux_bottom;
mask += mask_inc;
}
/* Main part */
w = pixman_int_to_fixed (bits->width - 1);
while (buffer < end && x < w)
{
if (*mask)
{
uint32_t tl, tr, bl, br;
int32_t distx;
tl = top_row [pixman_fixed_to_int (x_top)] | top_mask;
tr = top_row [pixman_fixed_to_int (x_top) + 1] | top_mask;
bl = bottom_row [pixman_fixed_to_int (x_bottom)] | bottom_mask;
br = bottom_row [pixman_fixed_to_int (x_bottom) + 1] | bottom_mask;
distx = (x >> 8) & 0xff;
*buffer = bilinear_interpolation (tl, tr, bl, br, distx, disty);
}
buffer++;
x += ux;
x_top += ux_top;
x_bottom += ux_bottom;
mask += mask_inc;
}
/* Right Edge */
w = pixman_int_to_fixed (bits->width);
while (buffer < end && x < w)
{
if (*mask)
{
uint32_t tl, bl;
int32_t distx;
tl = top_row [pixman_fixed_to_int (x_top)] | top_mask;
bl = bottom_row [pixman_fixed_to_int (x_bottom)] | bottom_mask;
distx = (x >> 8) & 0xff;
*buffer = bilinear_interpolation (tl, 0, bl, 0, distx, disty);
}
buffer++;
x += ux;
x_top += ux_top;
x_bottom += ux_bottom;
mask += mask_inc;
}
/* Zero fill to the left of the image */
while (buffer < end)
*buffer++ = 0;
}
static force_inline uint32_t
bits_image_fetch_pixel_convolution (bits_image_t *image,
pixman_fixed_t x,
pixman_fixed_t y,
get_pixel_t get_pixel)
{
pixman_fixed_t *params = image->common.filter_params;
int x_off = (params[0] - pixman_fixed_1) >> 1;
int y_off = (params[1] - pixman_fixed_1) >> 1;
int32_t cwidth = pixman_fixed_to_int (params[0]);
int32_t cheight = pixman_fixed_to_int (params[1]);
int32_t srtot, sgtot, sbtot, satot;
int32_t i, j, x1, x2, y1, y2;
pixman_repeat_t repeat_mode = image->common.repeat;
int width = image->width;
int height = image->height;
params += 2;
x1 = pixman_fixed_to_int (x - pixman_fixed_e - x_off);
y1 = pixman_fixed_to_int (y - pixman_fixed_e - y_off);
x2 = x1 + cwidth;
y2 = y1 + cheight;
srtot = sgtot = sbtot = satot = 0;
for (i = y1; i < y2; ++i)
{
for (j = x1; j < x2; ++j)
{
int rx = j;
int ry = i;
pixman_fixed_t f = *params;
if (f)
{
uint32_t pixel;
if (repeat_mode != PIXMAN_REPEAT_NONE)
{
repeat (repeat_mode, width, &rx);
repeat (repeat_mode, height, &ry);
pixel = get_pixel (image, rx, ry, FALSE);
}
else
{
pixel = get_pixel (image, rx, ry, TRUE);
}
srtot += RED_8 (pixel) * f;
sgtot += GREEN_8 (pixel) * f;
sbtot += BLUE_8 (pixel) * f;
satot += ALPHA_8 (pixel) * f;
}
params++;
}
}
satot >>= 16;
srtot >>= 16;
sgtot >>= 16;
sbtot >>= 16;
satot = CLIP (satot, 0, 0xff);
srtot = CLIP (srtot, 0, 0xff);
sgtot = CLIP (sgtot, 0, 0xff);
sbtot = CLIP (sbtot, 0, 0xff);
return ((satot << 24) | (srtot << 16) | (sgtot << 8) | (sbtot));
}
static force_inline uint32_t
bits_image_fetch_pixel_filtered (bits_image_t *image,
pixman_fixed_t x,
pixman_fixed_t y,
get_pixel_t get_pixel)
{
switch (image->common.filter)
{
case PIXMAN_FILTER_NEAREST:
case PIXMAN_FILTER_FAST:
return bits_image_fetch_pixel_nearest (image, x, y, get_pixel);
break;
case PIXMAN_FILTER_BILINEAR:
case PIXMAN_FILTER_GOOD:
case PIXMAN_FILTER_BEST:
return bits_image_fetch_pixel_bilinear (image, x, y, get_pixel);
break;
case PIXMAN_FILTER_CONVOLUTION:
return bits_image_fetch_pixel_convolution (image, x, y, get_pixel);
break;
default:
break;
}
return 0;
}
static void
bits_image_fetch_affine_no_alpha (pixman_image_t * image,
int offset,
int line,
int width,
uint32_t * buffer,
const uint32_t * mask)
{
pixman_fixed_t x, y;
pixman_fixed_t ux, uy;
pixman_vector_t v;
int i;
/* reference point is the center of the pixel */
v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2;
v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2;
v.vector[2] = pixman_fixed_1;
if (image->common.transform)
{
if (!pixman_transform_point_3d (image->common.transform, &v))
return;
ux = image->common.transform->matrix[0][0];
uy = image->common.transform->matrix[1][0];
}
else
{
ux = pixman_fixed_1;
uy = 0;
}
x = v.vector[0];
y = v.vector[1];
for (i = 0; i < width; ++i)
{
if (!mask || mask[i])
{
buffer[i] = bits_image_fetch_pixel_filtered (
&image->bits, x, y, fetch_pixel_no_alpha);
}
x += ux;
y += uy;
}
}
/* General fetcher */
static force_inline uint32_t
fetch_pixel_general (bits_image_t *image, int x, int y, pixman_bool_t check_bounds)
{
uint32_t pixel;
if (check_bounds &&
(x < 0 || x >= image->width || y < 0 || y >= image->height))
{
return 0;
}
pixel = image->fetch_pixel_32 (image, x, y);
if (image->common.alpha_map)
{
uint32_t pixel_a;
x -= image->common.alpha_origin_x;
y -= image->common.alpha_origin_y;
if (x < 0 || x >= image->common.alpha_map->width ||
y < 0 || y >= image->common.alpha_map->height)
{
pixel_a = 0;
}
else
{
pixel_a = image->common.alpha_map->fetch_pixel_32 (
image->common.alpha_map, x, y);
pixel_a = ALPHA_8 (pixel_a);
}
pixel &= 0x00ffffff;
pixel |= (pixel_a << 24);
}
return pixel;
}
static void
bits_image_fetch_general (pixman_image_t * image,
int offset,
int line,
int width,
uint32_t * buffer,
const uint32_t * mask)
{
pixman_fixed_t x, y, w;
pixman_fixed_t ux, uy, uw;
pixman_vector_t v;
int i;
/* reference point is the center of the pixel */
v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2;
v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2;
v.vector[2] = pixman_fixed_1;
if (image->common.transform)
{
if (!pixman_transform_point_3d (image->common.transform, &v))
return;
ux = image->common.transform->matrix[0][0];
uy = image->common.transform->matrix[1][0];
uw = image->common.transform->matrix[2][0];
}
else
{
ux = pixman_fixed_1;
uy = 0;
uw = 0;
}
x = v.vector[0];
y = v.vector[1];
w = v.vector[2];
for (i = 0; i < width; ++i)
{
pixman_fixed_t x0, y0;
if (!mask || mask[i])
{
if (w != 0)
{
x0 = ((pixman_fixed_48_16_t)x << 16) / w;
y0 = ((pixman_fixed_48_16_t)y << 16) / w;
}
else
{
x0 = 0;
y0 = 0;
}
buffer[i] = bits_image_fetch_pixel_filtered (
&image->bits, x0, y0, fetch_pixel_general);
}
x += ux;
y += uy;
w += uw;
}
}
static const uint8_t zero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
typedef uint32_t (* convert_pixel_t) (const uint8_t *row, int x);
static force_inline void
bits_image_fetch_bilinear_affine (pixman_image_t * image,
int offset,
int line,
int width,
uint32_t * buffer,
const uint32_t * mask,
convert_pixel_t convert_pixel,
pixman_format_code_t format,
pixman_repeat_t repeat_mode)
{
pixman_fixed_t x, y;
pixman_fixed_t ux, uy;
pixman_vector_t v;
bits_image_t *bits = &image->bits;
int i;
/* reference point is the center of the pixel */
v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2;
v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2;
v.vector[2] = pixman_fixed_1;
if (!pixman_transform_point_3d (image->common.transform, &v))
return;
ux = image->common.transform->matrix[0][0];
uy = image->common.transform->matrix[1][0];
x = v.vector[0];
y = v.vector[1];
for (i = 0; i < width; ++i)
{
int x1, y1, x2, y2;
uint32_t tl, tr, bl, br;
int32_t distx, disty;
int width = image->bits.width;
int height = image->bits.height;
const uint8_t *row1;
const uint8_t *row2;
if (mask && !mask[i])
goto next;
x1 = x - pixman_fixed_1 / 2;
y1 = y - pixman_fixed_1 / 2;
distx = (x1 >> 8) & 0xff;
disty = (y1 >> 8) & 0xff;
y1 = pixman_fixed_to_int (y1);
y2 = y1 + 1;
x1 = pixman_fixed_to_int (x1);
x2 = x1 + 1;
if (repeat_mode != PIXMAN_REPEAT_NONE)
{
uint32_t mask;
mask = PIXMAN_FORMAT_A (format)? 0 : 0xff000000;
repeat (repeat_mode, width, &x1);
repeat (repeat_mode, height, &y1);
repeat (repeat_mode, width, &x2);
repeat (repeat_mode, height, &y2);
row1 = (uint8_t *)bits->bits + bits->rowstride * 4 * y1;
row2 = (uint8_t *)bits->bits + bits->rowstride * 4 * y2;
tl = convert_pixel (row1, x1) | mask;
tr = convert_pixel (row1, x2) | mask;
bl = convert_pixel (row2, x1) | mask;
br = convert_pixel (row2, x2) | mask;
}
else
{
uint32_t mask1, mask2;
int bpp;
/* Note: PIXMAN_FORMAT_BPP() returns an unsigned value,
* which means if you use it in expressions, those
* expressions become unsigned themselves. Since
* the variables below can be negative in some cases,
* that will lead to crashes on 64 bit architectures.
*
* So this line makes sure bpp is signed
*/
bpp = PIXMAN_FORMAT_BPP (format);
if (x1 >= width || x2 < 0 || y1 >= height || y2 < 0)
{
buffer[i] = 0;
goto next;
}
if (y2 == 0)
{
row1 = zero;
mask1 = 0;
}
else
{
row1 = (uint8_t *)bits->bits + bits->rowstride * 4 * y1;
row1 += bpp / 8 * x1;
mask1 = PIXMAN_FORMAT_A (format)? 0 : 0xff000000;
}
if (y1 == height - 1)
{
row2 = zero;
mask2 = 0;
}
else
{
row2 = (uint8_t *)bits->bits + bits->rowstride * 4 * y2;
row2 += bpp / 8 * x1;
mask2 = PIXMAN_FORMAT_A (format)? 0 : 0xff000000;
}
if (x2 == 0)
{
tl = 0;
bl = 0;
}
else
{
tl = convert_pixel (row1, 0) | mask1;
bl = convert_pixel (row2, 0) | mask2;
}
if (x1 == width - 1)
{
tr = 0;
br = 0;
}
else
{
tr = convert_pixel (row1, 1) | mask1;
br = convert_pixel (row2, 1) | mask2;
}
}
buffer[i] = bilinear_interpolation (
tl, tr, bl, br, distx, disty);
next:
x += ux;
y += uy;
}
}
static force_inline uint32_t
convert_a8r8g8b8 (const uint8_t *row, int x)
{
return *(((uint32_t *)row) + x);
}
static force_inline uint32_t
convert_x8r8g8b8 (const uint8_t *row, int x)
{
return *(((uint32_t *)row) + x);
}
static force_inline uint32_t
convert_a8 (const uint8_t *row, int x)
{
return *(row + x) << 24;
}
static force_inline uint32_t
convert_r5g6b5 (const uint8_t *row, int x)
{
return CONVERT_0565_TO_0888 (*((uint16_t *)row + x));
}
#define MAKE_BILINEAR_FETCHER(name, format, repeat_mode) \
static void \
bits_image_fetch_bilinear_affine_ ## name (pixman_image_t *image, \
int offset, \
int line, \
int width, \
uint32_t * buffer, \
const uint32_t * mask) \
{ \
bits_image_fetch_bilinear_affine (image, offset, line, width, buffer, mask, \
convert_ ## format, \
PIXMAN_ ## format, \
repeat_mode); \
} \
extern int no_such_variable
MAKE_BILINEAR_FETCHER (pad_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_PAD);
MAKE_BILINEAR_FETCHER (none_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_NONE);
MAKE_BILINEAR_FETCHER (reflect_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_REFLECT);
MAKE_BILINEAR_FETCHER (normal_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_NORMAL);
MAKE_BILINEAR_FETCHER (pad_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_PAD);
MAKE_BILINEAR_FETCHER (none_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_NONE);
MAKE_BILINEAR_FETCHER (reflect_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_REFLECT);
MAKE_BILINEAR_FETCHER (normal_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_NORMAL);
MAKE_BILINEAR_FETCHER (pad_a8, a8, PIXMAN_REPEAT_PAD);
MAKE_BILINEAR_FETCHER (none_a8, a8, PIXMAN_REPEAT_NONE);
MAKE_BILINEAR_FETCHER (reflect_a8, a8, PIXMAN_REPEAT_REFLECT);
MAKE_BILINEAR_FETCHER (normal_a8, a8, PIXMAN_REPEAT_NORMAL);
MAKE_BILINEAR_FETCHER (pad_r5g6b5, r5g6b5, PIXMAN_REPEAT_PAD);
MAKE_BILINEAR_FETCHER (none_r5g6b5, r5g6b5, PIXMAN_REPEAT_NONE);
MAKE_BILINEAR_FETCHER (reflect_r5g6b5, r5g6b5, PIXMAN_REPEAT_REFLECT);
MAKE_BILINEAR_FETCHER (normal_r5g6b5, r5g6b5, PIXMAN_REPEAT_NORMAL);
static void
bits_image_fetch_solid_32 (pixman_image_t * image,
int x,
int y,
int width,
uint32_t * buffer,
const uint32_t * mask)
{
uint32_t color;
uint32_t *end;
color = image->bits.fetch_pixel_32 (&image->bits, 0, 0);
end = buffer + width;
while (buffer < end)
*(buffer++) = color;
}
static void
bits_image_fetch_solid_64 (pixman_image_t * image,
int x,
int y,
int width,
uint32_t * b,
const uint32_t * unused)
{
uint64_t color;
uint64_t *buffer = (uint64_t *)b;
uint64_t *end;
color = image->bits.fetch_pixel_64 (&image->bits, 0, 0);
end = buffer + width;
while (buffer < end)
*(buffer++) = color;
}
static void
bits_image_fetch_untransformed_repeat_none (bits_image_t *image,
pixman_bool_t wide,
int x,
int y,
int width,
uint32_t * buffer)
{
uint32_t w;
if (y < 0 || y >= image->height)
{
memset (buffer, 0, width * (wide? 8 : 4));
return;
}
if (x < 0)
{
w = MIN (width, -x);
memset (buffer, 0, w * (wide ? 8 : 4));
width -= w;
buffer += w * (wide? 2 : 1);
x += w;
}
if (x < image->width)
{
w = MIN (width, image->width - x);
if (wide)
image->fetch_scanline_64 ((pixman_image_t *)image, x, y, w, buffer, NULL);
else
image->fetch_scanline_32 ((pixman_image_t *)image, x, y, w, buffer, NULL);
width -= w;
buffer += w * (wide? 2 : 1);
x += w;
}
memset (buffer, 0, width * (wide ? 8 : 4));
}
static void
bits_image_fetch_untransformed_repeat_normal (bits_image_t *image,
pixman_bool_t wide,
int x,
int y,
int width,
uint32_t * buffer)
{
uint32_t w;
while (y < 0)
y += image->height;
while (y >= image->height)
y -= image->height;
while (width)
{
while (x < 0)
x += image->width;
while (x >= image->width)
x -= image->width;
w = MIN (width, image->width - x);
if (wide)
image->fetch_scanline_64 ((pixman_image_t *)image, x, y, w, buffer, NULL);
else
image->fetch_scanline_32 ((pixman_image_t *)image, x, y, w, buffer, NULL);
buffer += w * (wide? 2 : 1);
x += w;
width -= w;
}
}
static void
bits_image_fetch_untransformed_32 (pixman_image_t * image,
int x,
int y,
int width,
uint32_t * buffer,
const uint32_t * mask)
{
if (image->common.repeat == PIXMAN_REPEAT_NONE)
{
bits_image_fetch_untransformed_repeat_none (
&image->bits, FALSE, x, y, width, buffer);
}
else
{
bits_image_fetch_untransformed_repeat_normal (
&image->bits, FALSE, x, y, width, buffer);
}
}
static void
bits_image_fetch_untransformed_64 (pixman_image_t * image,
int x,
int y,
int width,
uint32_t * buffer,
const uint32_t * unused)
{
if (image->common.repeat == PIXMAN_REPEAT_NONE)
{
bits_image_fetch_untransformed_repeat_none (
&image->bits, TRUE, x, y, width, buffer);
}
else
{
bits_image_fetch_untransformed_repeat_normal (
&image->bits, TRUE, x, y, width, buffer);
}
}
typedef struct
{
pixman_format_code_t format;
uint32_t flags;
fetch_scanline_t fetch_32;
fetch_scanline_t fetch_64;
} fetcher_info_t;
static const fetcher_info_t fetcher_info[] =
{
{ PIXMAN_solid,
FAST_PATH_NO_ALPHA_MAP,
bits_image_fetch_solid_32,
bits_image_fetch_solid_64
},
{ PIXMAN_any,
(FAST_PATH_NO_ALPHA_MAP |
FAST_PATH_ID_TRANSFORM |
FAST_PATH_NO_CONVOLUTION_FILTER |
FAST_PATH_NO_PAD_REPEAT |
FAST_PATH_NO_REFLECT_REPEAT),
bits_image_fetch_untransformed_32,
bits_image_fetch_untransformed_64
},
#define FAST_BILINEAR_FLAGS \
(FAST_PATH_NO_ALPHA_MAP | \
FAST_PATH_NO_ACCESSORS | \
FAST_PATH_HAS_TRANSFORM | \
FAST_PATH_AFFINE_TRANSFORM | \
FAST_PATH_X_UNIT_POSITIVE | \
FAST_PATH_Y_UNIT_ZERO | \
FAST_PATH_NONE_REPEAT | \
FAST_PATH_BILINEAR_FILTER)
{ PIXMAN_a8r8g8b8,
FAST_BILINEAR_FLAGS,
bits_image_fetch_bilinear_no_repeat_8888,
_pixman_image_get_scanline_generic_64
},
{ PIXMAN_x8r8g8b8,
FAST_BILINEAR_FLAGS,
bits_image_fetch_bilinear_no_repeat_8888,
_pixman_image_get_scanline_generic_64
},
#define GENERAL_BILINEAR_FLAGS \
(FAST_PATH_NO_ALPHA_MAP | \
FAST_PATH_NO_ACCESSORS | \
FAST_PATH_HAS_TRANSFORM | \
FAST_PATH_AFFINE_TRANSFORM | \
FAST_PATH_BILINEAR_FILTER)
#define BILINEAR_AFFINE_FAST_PATH(name, format, repeat) \
{ PIXMAN_ ## format, \
GENERAL_BILINEAR_FLAGS | FAST_PATH_ ## repeat ## _REPEAT, \
bits_image_fetch_bilinear_affine_ ## name, \
_pixman_image_get_scanline_generic_64 \
},
BILINEAR_AFFINE_FAST_PATH (pad_a8r8g8b8, a8r8g8b8, PAD)
BILINEAR_AFFINE_FAST_PATH (none_a8r8g8b8, a8r8g8b8, NONE)
BILINEAR_AFFINE_FAST_PATH (reflect_a8r8g8b8, a8r8g8b8, REFLECT)
BILINEAR_AFFINE_FAST_PATH (normal_a8r8g8b8, a8r8g8b8, NORMAL)
BILINEAR_AFFINE_FAST_PATH (pad_x8r8g8b8, x8r8g8b8, PAD)
BILINEAR_AFFINE_FAST_PATH (none_x8r8g8b8, x8r8g8b8, NONE)
BILINEAR_AFFINE_FAST_PATH (reflect_x8r8g8b8, x8r8g8b8, REFLECT)
BILINEAR_AFFINE_FAST_PATH (normal_x8r8g8b8, x8r8g8b8, NORMAL)
BILINEAR_AFFINE_FAST_PATH (pad_a8, a8, PAD)
BILINEAR_AFFINE_FAST_PATH (none_a8, a8, NONE)
BILINEAR_AFFINE_FAST_PATH (reflect_a8, a8, REFLECT)
BILINEAR_AFFINE_FAST_PATH (normal_a8, a8, NORMAL)
BILINEAR_AFFINE_FAST_PATH (pad_r5g6b5, r5g6b5, PAD)
BILINEAR_AFFINE_FAST_PATH (none_r5g6b5, r5g6b5, NONE)
BILINEAR_AFFINE_FAST_PATH (reflect_r5g6b5, r5g6b5, REFLECT)
BILINEAR_AFFINE_FAST_PATH (normal_r5g6b5, r5g6b5, NORMAL)
/* Affine, no alpha */
{ PIXMAN_any,
(FAST_PATH_NO_ALPHA_MAP | FAST_PATH_HAS_TRANSFORM | FAST_PATH_AFFINE_TRANSFORM),
bits_image_fetch_affine_no_alpha,
_pixman_image_get_scanline_generic_64
},
/* General */
{ PIXMAN_any, 0, bits_image_fetch_general, _pixman_image_get_scanline_generic_64 },
{ PIXMAN_null },
};
static void
bits_image_property_changed (pixman_image_t *image)
{
uint32_t flags = image->common.flags;
pixman_format_code_t format = image->common.extended_format_code;
const fetcher_info_t *info;
_pixman_bits_image_setup_accessors (&image->bits);
info = fetcher_info;
while (info->format != PIXMAN_null)
{
if ((info->format == format || info->format == PIXMAN_any) &&
(info->flags & flags) == info->flags)
{
image->common.get_scanline_32 = info->fetch_32;
image->common.get_scanline_64 = info->fetch_64;
break;
}
info++;
}
}
static uint32_t *
create_bits (pixman_format_code_t format,
int width,
int height,
int * rowstride_bytes)
{
int stride;
int buf_size;
int bpp;
/* what follows is a long-winded way, avoiding any possibility of integer
* overflows, of saying:
* stride = ((width * bpp + 0x1f) >> 5) * sizeof (uint32_t);
*/
bpp = PIXMAN_FORMAT_BPP (format);
if (pixman_multiply_overflows_int (width, bpp))
return NULL;
stride = width * bpp;
if (pixman_addition_overflows_int (stride, 0x1f))
return NULL;
stride += 0x1f;
stride >>= 5;
stride *= sizeof (uint32_t);
if (pixman_multiply_overflows_int (height, stride))
return NULL;
buf_size = height * stride;
if (rowstride_bytes)
*rowstride_bytes = stride;
return calloc (buf_size, 1);
}
PIXMAN_EXPORT pixman_image_t *
pixman_image_create_bits (pixman_format_code_t format,
int width,
int height,
uint32_t * bits,
int rowstride_bytes)
{
pixman_image_t *image;
uint32_t *free_me = NULL;
/* must be a whole number of uint32_t's
*/
return_val_if_fail (
bits == NULL || (rowstride_bytes % sizeof (uint32_t)) == 0, NULL);
return_val_if_fail (PIXMAN_FORMAT_BPP (format) >= PIXMAN_FORMAT_DEPTH (format), NULL);
if (!bits && width && height)
{
free_me = bits = create_bits (format, width, height, &rowstride_bytes);
if (!bits)
return NULL;
}
image = _pixman_image_allocate ();
if (!image)
{
if (free_me)
free (free_me);
return NULL;
}
image->type = BITS;
image->bits.format = format;
image->bits.width = width;
image->bits.height = height;
image->bits.bits = bits;
image->bits.free_me = free_me;
image->bits.read_func = NULL;
image->bits.write_func = NULL;
/* The rowstride is stored in number of uint32_t */
image->bits.rowstride = rowstride_bytes / (int) sizeof (uint32_t);
image->bits.indexed = NULL;
image->common.property_changed = bits_image_property_changed;
_pixman_image_reset_clip_region (image);
return image;
}
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