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app: port preview rendering to GEGL/cairo 

which gets rid of the render blend arrays in gimprender.[ch], and of
image preview demultiplication.
This commit is contained in:
Michael Natterer 2012-04-10 14:08:44 +02:00
parent 5735e35f0c
commit b78d6c1d5d
4 changed files with 165 additions and 313 deletions
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48
app/core/gimpimage-preview.c
View File

@ -143,51 +143,15 @@ gimp_image_get_new_preview (GimpViewable *viewable,
buf = tile_manager_get_preview (tiles, width, height);
/* FIXME: We could avoid this if the view renderer and all other
* preview code would know how to deal with pre-multiply alpha.
*/
if (is_premult)
{
guchar *data;
gint pixels;
g_return_if_fail (buf != NULL);
switch (babl_format_get_bytes_per_pixel (buf->format))
if (buf->format == babl_format ("Y'A u8"))
{
case 1:
break;
case 2:
data = gimp_temp_buf_get_data (buf);
pixels = buf->width * buf->height;
while (pixels--)
{
data[0] = (data[0] << 8) / (data[1] + 1);
data += 2;
}
break;
case 3:
break;
case 4:
data = gimp_temp_buf_get_data (buf);
pixels = buf->width * buf->height;
while (pixels--)
{
data[0] = (data[0] << 8) / (data[3] + 1);
data[1] = (data[1] << 8) / (data[3] + 1);
data[2] = (data[2] << 8) / (data[3] + 1);
data += 4;
}
break;
default:
g_warn_if_reached ();
break;
buf->format = babl_format ("Y'aA u8");
}
else if (buf->format == babl_format ("R'G'B'A u8"))
{
buf->format = babl_format ("R'aG'aB'aA u8");
}
}

103
app/widgets/gimprender.c
View File

@ -28,7 +28,6 @@
#include "widgets-types.h"
#include "core/gimp.h"
#include "core/gimpviewable.h"
#include "gimprender.h"
@ -38,17 +37,6 @@ static void gimp_render_setup_notify (gpointer config,
Gimp *gimp);
/* accelerate blending on the checkerboard */
guchar *gimp_render_check_buf = NULL;
guchar *gimp_render_empty_buf = NULL;
guchar *gimp_render_white_buf = NULL;
guchar *gimp_render_blend_dark_check = NULL;
guchar *gimp_render_blend_light_check = NULL;
guchar *gimp_render_blend_white = NULL;
static GimpRGB light;
static GimpRGB dark;
@ -73,42 +61,6 @@ gimp_render_exit (Gimp *gimp)
g_signal_handlers_disconnect_by_func (gimp->config,
gimp_render_setup_notify,
gimp);
if (gimp_render_blend_dark_check)
{
g_free (gimp_render_blend_dark_check);
gimp_render_blend_dark_check = NULL;
}
if (gimp_render_blend_light_check)
{
g_free (gimp_render_blend_light_check);
gimp_render_blend_light_check = NULL;
}
if (gimp_render_blend_white)
{
g_free (gimp_render_blend_white);
gimp_render_blend_white = NULL;
}
if (gimp_render_check_buf)
{
g_free (gimp_render_check_buf);
gimp_render_check_buf = NULL;
}
if (gimp_render_empty_buf)
{
g_free (gimp_render_empty_buf);
gimp_render_empty_buf = NULL;
}
if (gimp_render_white_buf)
{
g_free (gimp_render_white_buf);
gimp_render_white_buf = NULL;
}
}
const GimpRGB *
@ -131,7 +83,6 @@ gimp_render_setup_notify (gpointer config,
GimpCheckType check_type;
guchar dark_check;
guchar light_check;
gint i, j;
g_object_get (config,
"transparency-type", &check_type,
@ -141,58 +92,4 @@ gimp_render_setup_notify (gpointer config,
gimp_rgba_set_uchar (&light, light_check, light_check, light_check, 255);
gimp_rgba_set_uchar (&dark, dark_check, dark_check, dark_check, 255);
if (! gimp_render_blend_dark_check)
gimp_render_blend_dark_check = g_new (guchar, 65536);
if (! gimp_render_blend_light_check)
gimp_render_blend_light_check = g_new (guchar, 65536);
if (! gimp_render_blend_white)
gimp_render_blend_white = g_new (guchar, 65536);
for (i = 0; i < 256; i++)
for (j = 0; j < 256; j++)
{
gimp_render_blend_dark_check [(i << 8) + j] =
(guchar) ((j * i + dark_check * (255 - i)) / 255);
gimp_render_blend_light_check [(i << 8) + j] =
(guchar) ((j * i + light_check * (255 - i)) / 255);
gimp_render_blend_white [(i << 8) + j] =
(guchar) ((j * i + 255 * (255 - i)) / 255);
}
g_free (gimp_render_check_buf);
g_free (gimp_render_empty_buf);
g_free (gimp_render_white_buf);
#define BUF_SIZE (GIMP_VIEWABLE_MAX_PREVIEW_SIZE + 4)
gimp_render_check_buf = g_new (guchar, BUF_SIZE * 3);
gimp_render_empty_buf = g_new0 (guchar, BUF_SIZE * 3);
gimp_render_white_buf = g_new (guchar, BUF_SIZE * 3);
/* calculate check buffer for previews */
memset (gimp_render_white_buf, 255, BUF_SIZE * 3);
for (i = 0; i < BUF_SIZE; i++)
{
if (i & 0x4)
{
gimp_render_check_buf[i * 3 + 0] = dark_check;
gimp_render_check_buf[i * 3 + 1] = dark_check;
gimp_render_check_buf[i * 3 + 2] = dark_check;
}
else
{
gimp_render_check_buf[i * 3 + 0] = light_check;
gimp_render_check_buf[i * 3 + 1] = light_check;
gimp_render_check_buf[i * 3 + 2] = light_check;
}
}
#undef BUF_SIZE
}

11
app/widgets/gimprender.h
View File

@ -19,17 +19,6 @@
#define __GIMP_RENDER_H__
/* buffers that contain pre-rendered patterns/colors */
extern guchar *gimp_render_check_buf;
extern guchar *gimp_render_empty_buf;
extern guchar *gimp_render_white_buf;
/* lookup tables for blending over a checkerboard */
extern guchar *gimp_render_blend_dark_check;
extern guchar *gimp_render_blend_light_check;
extern guchar *gimp_render_blend_white;
void gimp_render_init (Gimp *gimp);
void gimp_render_exit (Gimp *gimp);

316
app/widgets/gimpviewrenderer.c
View File

@ -33,6 +33,7 @@
#include "widgets-types.h"
#include "core/gimp-cairo.h"
#include "core/gimpcontext.h"
#include "core/gimpmarshal.h"
#include "core/gimptempbuf.h"
@ -73,7 +74,8 @@ static cairo_pattern_t *
gimp_view_renderer_create_background (GimpViewRenderer *renderer,
GtkWidget *widget);
static void gimp_view_render_temp_buf_to_surface (GimpTempBuf *temp_buf,
static void gimp_view_render_temp_buf_to_surface (GimpViewRenderer *renderer,
GimpTempBuf *temp_buf,
gint channel,
GimpViewBG inside_bg,
GimpViewBG outside_bg,
@ -695,8 +697,10 @@ gimp_view_renderer_real_draw (GimpViewRenderer *renderer,
if (renderer->bg_stock_id)
{
if (! renderer->pattern)
renderer->pattern = gimp_view_renderer_create_background (renderer,
widget);
{
renderer->pattern = gimp_view_renderer_create_background (renderer,
widget);
}
cairo_set_source (cr, renderer->pattern);
cairo_paint (cr);
@ -724,12 +728,10 @@ gimp_view_renderer_real_draw (GimpViewRenderer *renderer,
if (content == CAIRO_CONTENT_COLOR_ALPHA)
{
if (! renderer->pattern)
{
renderer->pattern =
gimp_cairo_checkerboard_create (cr, GIMP_CHECK_SIZE_SM,
gimp_render_light_check_color (),
gimp_render_dark_check_color ());
}
renderer->pattern =
gimp_cairo_checkerboard_create (cr, GIMP_CHECK_SIZE_SM,
gimp_render_light_check_color (),
gimp_render_dark_check_color ());
cairo_set_source (cr, renderer->pattern);
cairo_fill_preserve (cr);
@ -824,7 +826,8 @@ gimp_view_renderer_render_temp_buf (GimpViewRenderer *renderer,
renderer->width,
renderer->height);
gimp_view_render_temp_buf_to_surface (temp_buf,
gimp_view_render_temp_buf_to_surface (renderer,
temp_buf,
channel,
inside_bg,
outside_bg,
@ -916,47 +919,22 @@ gimp_view_renderer_render_stock (GimpViewRenderer *renderer,
}
static void
gimp_view_render_temp_buf_to_surface (GimpTempBuf *temp_buf,
gint channel,
GimpViewBG inside_bg,
GimpViewBG outside_bg,
cairo_surface_t *surface,
gint dest_width,
gint dest_height)
gimp_view_render_temp_buf_to_surface (GimpViewRenderer *renderer,
GimpTempBuf *temp_buf,
gint channel,
GimpViewBG inside_bg,
GimpViewBG outside_bg,
cairo_surface_t *surface,
gint surface_width,
gint surface_height)
{
const guchar *src;
const guchar *pad_buf;
guchar *dest;
gint i, j;
gint x1, y1;
gint x2, y2;
gint bytes;
gint rowstride;
gint dest_stride;
gboolean color;
gboolean has_alpha;
gboolean render_composite;
gint red_component;
gint green_component;
gint blue_component;
gint alpha_component;
cairo_t *cr;
gint x, y;
gint width, height;
g_return_if_fail (temp_buf != NULL);
g_return_if_fail (surface != NULL);
/* In rare cases we can get here while GIMP is exiting, handle that
* by checking for availability of the buffers
*/
if (! gimp_render_check_buf ||
! gimp_render_empty_buf ||
! gimp_render_white_buf)
return;
cairo_surface_flush (surface);
dest = cairo_image_surface_get_data (surface);
dest_stride = cairo_image_surface_get_stride (surface);
/* Here are the different cases this functions handles correctly:
* 1) Offset temp_buf which does not necessarily cover full image area
* 2) Color conversion of temp_buf if it is gray and image is color
@ -969,146 +947,170 @@ gimp_view_render_temp_buf_to_surface (GimpTempBuf *temp_buf,
* 3) If image is gray, then temp_buf should have bytes == {1, 2}
*/
bytes = babl_format_get_bytes_per_pixel (temp_buf->format);
color = (bytes == 3 || bytes == 4);
has_alpha = babl_format_has_alpha (temp_buf->format);
render_composite = (channel == -1);
rowstride = temp_buf->width * bytes;
cr = cairo_create (surface);
/* render the checkerboard only if the temp_buf has alpha *and*
* we render a composite view
*/
if (has_alpha && render_composite && outside_bg == GIMP_VIEW_BG_CHECKS)
pad_buf = gimp_render_check_buf;
else if (outside_bg == GIMP_VIEW_BG_WHITE)
pad_buf = gimp_render_white_buf;
else
pad_buf = gimp_render_empty_buf;
if (render_composite)
if (outside_bg == GIMP_VIEW_BG_CHECKS ||
inside_bg == GIMP_VIEW_BG_CHECKS)
{
if (color)
if (! renderer->pattern)
renderer->pattern =
gimp_cairo_checkerboard_create (cr, GIMP_CHECK_SIZE_SM,
gimp_render_light_check_color (),
gimp_render_dark_check_color ());
}
switch (outside_bg)
{
case GIMP_VIEW_BG_CHECKS:
cairo_set_source (cr, renderer->pattern);
break;
case GIMP_VIEW_BG_WHITE:
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
break;
}
cairo_paint (cr);
if (! gimp_rectangle_intersect (0, 0,
surface_width, surface_height,
temp_buf->x, temp_buf->y,
temp_buf->width, temp_buf->height,
&x, &y,
&width, &height))
{
cairo_destroy (cr);
return;
}
if (inside_bg != outside_bg &&
babl_format_has_alpha (temp_buf->format) && channel == -1)
{
cairo_rectangle (cr, x, y, width, height);
switch (inside_bg)
{
red_component = RED;
green_component = GREEN;
blue_component = BLUE;
alpha_component = ALPHA;
}
else
{
red_component = GRAY;
green_component = GRAY;
blue_component = GRAY;
alpha_component = ALPHA_G;
case GIMP_VIEW_BG_CHECKS:
cairo_set_source (cr, renderer->pattern);
break;
case GIMP_VIEW_BG_WHITE:
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
break;
}
cairo_fill (cr);
}
if (babl_format_has_alpha (temp_buf->format) && channel == -1)
{
GeglBuffer *src_buffer;
GeglBuffer *dest_buffer;
cairo_surface_t *alpha_surface;
alpha_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
width, height);
src_buffer = gimp_temp_buf_create_buffer (temp_buf);
dest_buffer = gimp_cairo_image_surface_create_buffer (alpha_surface);
gegl_buffer_copy (src_buffer,
GEGL_RECTANGLE (x - temp_buf->x,
y - temp_buf->y,
width, height),
dest_buffer,
GEGL_RECTANGLE (0, 0, 0, 0));
g_object_unref (src_buffer);
g_object_unref (dest_buffer);
cairo_surface_mark_dirty (alpha_surface);
cairo_translate (cr, x, y);
cairo_rectangle (cr, 0, 0, width, height);
cairo_set_source_surface (cr, alpha_surface, 0, 0);
cairo_fill (cr);
cairo_surface_destroy (alpha_surface);
}
else if (channel == -1)
{
GeglBuffer *src_buffer;
GeglBuffer *dest_buffer;
cairo_surface_flush (surface);
src_buffer = gimp_temp_buf_create_buffer (temp_buf);
dest_buffer = gimp_cairo_image_surface_create_buffer (surface);
gegl_buffer_copy (src_buffer,
GEGL_RECTANGLE (x - temp_buf->x,
y - temp_buf->y,
width, height),
dest_buffer,
GEGL_RECTANGLE (x, y, 0, 0));
g_object_unref (src_buffer);
g_object_unref (dest_buffer);
cairo_surface_mark_dirty (surface);
}
else
{
red_component = channel;
green_component = channel;
blue_component = channel;
alpha_component = 0;
}
const Babl *fish;
const guchar *src;
guchar *dest;
gint dest_stride;
gint bytes;
gint rowstride;
gint i;
x1 = CLAMP (temp_buf->x, 0, dest_width);
y1 = CLAMP (temp_buf->y, 0, dest_height);
x2 = CLAMP (temp_buf->x + temp_buf->width, 0, dest_width);
y2 = CLAMP (temp_buf->y + temp_buf->height, 0, dest_height);
cairo_surface_flush (surface);
src = gimp_temp_buf_get_data (temp_buf) + ((y1 - temp_buf->y) * rowstride +
(x1 - temp_buf->x) * bytes);
bytes = babl_format_get_bytes_per_pixel (temp_buf->format);
rowstride = temp_buf->width * bytes;
for (i = 0; i < dest_height; i++)
{
guchar *d = dest;
const guchar *cb;
gint offset;
src = gimp_temp_buf_get_data (temp_buf) + ((y - temp_buf->y) * rowstride +
(x - temp_buf->x) * bytes);
if (i & 0x4)
{
offset = 4;
cb = pad_buf + offset * 3;
}
else
{
offset = 0;
cb = pad_buf;
}
dest = cairo_image_surface_get_data (surface);
dest_stride = cairo_image_surface_get_stride (surface);
/* The interesting stuff between leading & trailing
* vertical transparency
*/
if (i >= y1 && i < y2)
dest += y * dest_stride + x * 4;
fish = babl_fish (temp_buf->format,
babl_format ("cairo-RGB24"));
for (i = y; i < (y + height); i++)
{
const guchar *s = src;
guchar *d = dest;
gint j;
/* Handle the leading transparency */
for (j = 0; j < x1; j++, d += 4, cb += 3)
for (j = x; j < (x + width); j++, d += 4, s += bytes)
{
GIMP_CAIRO_RGB24_SET_PIXEL (d, cb[0], cb[1], cb[2]);
}
/* The stuff in the middle */
for (j = x1; j < x2; j++, d += 4, s += bytes)
{
if (has_alpha && render_composite)
if (bytes > 2)
{
const guint a = s[alpha_component] << 8;
guchar pixel[4] = { s[channel], s[channel], s[channel], 255 };
if (inside_bg == GIMP_VIEW_BG_CHECKS)
{
if ((j + offset) & 0x4)
{
GIMP_CAIRO_RGB24_SET_PIXEL (d,
gimp_render_blend_dark_check [a | s[red_component]],
gimp_render_blend_dark_check [a | s[green_component]],
gimp_render_blend_dark_check [a | s[blue_component]]);
}
else
{
GIMP_CAIRO_RGB24_SET_PIXEL (d,
gimp_render_blend_light_check [a | s[red_component]],
gimp_render_blend_light_check [a | s[green_component]],
gimp_render_blend_light_check [a | s[blue_component]]);
}
}
else /* GIMP_VIEW_BG_WHITE */
{
GIMP_CAIRO_RGB24_SET_PIXEL (d,
gimp_render_blend_white [a | s[red_component]],
gimp_render_blend_white [a | s[green_component]],
gimp_render_blend_white [a | s[blue_component]]);
}
babl_process (fish, pixel, d, 1);
}
else
{
GIMP_CAIRO_RGB24_SET_PIXEL (d,
s[red_component],
s[green_component],
s[blue_component]);
guchar pixel[2] = { s[channel], 255 };
babl_process (fish, pixel, d, 1);
}
}
/* Handle the trailing transparency */
for (j = x2; j < dest_width; j++, d+= 4, cb += 3)
{
GIMP_CAIRO_RGB24_SET_PIXEL (d, cb[0], cb[1], cb[2]);
}
src += rowstride;
}
else
{
for (j = 0; j < dest_width; j++, d+= 4, cb += 3)
{
GIMP_CAIRO_RGB24_SET_PIXEL (d, cb[0], cb[1], cb[2]);
}
dest += dest_stride;
}
dest += dest_stride;
cairo_surface_mark_dirty (surface);
}
cairo_surface_mark_dirty (surface);
cairo_destroy (cr);
}
/* This function creates a background pattern from a stock icon