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cairo: Use GdkTexture for converting from pixbuf

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This commit is contained in:
Benjamin Otte 2021-10-06 22:17:11 +02:00
parent dc6e831524
commit 3f4fb93379
1 changed files with 6 additions and 70 deletions
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76
gdk/gdkcairo.c
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@ -91,11 +91,7 @@ void
gdk_cairo_surface_paint_pixbuf (cairo_surface_t *surface,
const GdkPixbuf *pixbuf)
{
int width, height;
guchar *gdk_pixels, *cairo_pixels;
int gdk_rowstride, cairo_stride;
int n_channels;
int j;
GdkTexture *texture;
if (cairo_surface_status (surface) != CAIRO_STATUS_SUCCESS)
return;
@ -111,71 +107,11 @@ gdk_cairo_surface_paint_pixbuf (cairo_surface_t *surface,
cairo_surface_flush (surface);
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
gdk_pixels = gdk_pixbuf_get_pixels (pixbuf);
gdk_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
n_channels = gdk_pixbuf_get_n_channels (pixbuf);
cairo_stride = cairo_image_surface_get_stride (surface);
cairo_pixels = cairo_image_surface_get_data (surface);
for (j = height; j; j--)
{
guchar *p = gdk_pixels;
guchar *q = cairo_pixels;
if (n_channels == 3)
{
guchar *end = p + 3 * width;
while (p < end)
{
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
q[0] = p[2];
q[1] = p[1];
q[2] = p[0];
q[3] = 0xFF;
#else
q[0] = 0xFF;
q[1] = p[0];
q[2] = p[1];
q[3] = p[2];
#endif
p += 3;
q += 4;
}
}
else
{
guchar *end = p + 4 * width;
guint t1,t2,t3;
#define MULT(d,c,a,t) G_STMT_START { t = c * a + 0x80; d = ((t >> 8) + t) >> 8; } G_STMT_END
while (p < end)
{
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
MULT(q[0], p[2], p[3], t1);
MULT(q[1], p[1], p[3], t2);
MULT(q[2], p[0], p[3], t3);
q[3] = p[3];
#else
q[0] = p[3];
MULT(q[1], p[0], p[3], t1);
MULT(q[2], p[1], p[3], t2);
MULT(q[3], p[2], p[3], t3);
#endif
p += 4;
q += 4;
}
#undef MULT
}
gdk_pixels += gdk_rowstride;
cairo_pixels += cairo_stride;
}
texture = gdk_texture_new_for_pixbuf (GDK_PIXBUF (pixbuf));
gdk_texture_download (texture,
cairo_image_surface_get_data (surface),
cairo_image_surface_get_stride (surface));
g_object_unref (texture);
cairo_surface_mark_dirty (surface);
}