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Use struct conv for blur kernel as well

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Instead of storing them as an array of xfixed.

Might cause some performance overhead for the new backend, because
it is allocating a buffer to do the conversion every frame. Will fix
later.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2019-02-17 23:47:46 +00:00
parent ae9dee8a9a
commit 2e2e8e3ce0
11 changed files with 215 additions and 203 deletions
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27
src/x.c
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@ -17,6 +17,7 @@
#include "region.h"
#include "compiler.h"
#include "common.h"
#include "kernel.h"
#include "x.h"
#include "log.h"
#include "backend/gl/glx.h"
@ -513,3 +514,29 @@ bool x_fence_sync(xcb_connection_t *c, xcb_sync_fence_t f) {
}
return true;
}
// xcb-render specific macros
#define XFIXED_TO_DOUBLE(value) (((double) (value)) / 65536)
#define DOUBLE_TO_XFIXED(value) ((xcb_render_fixed_t) (((double) (value)) * 65536))
/**
* Set the picture filter of a xrender picture to a convolution
* kernel.
*
* @param c xcb connection
* @param pict the picture
* @param kern the convolution kernel
*/
void
x_set_picture_convolution_kernel(xcb_connection_t *c,
xcb_render_picture_t pict, conv *kernel) {
auto buf = ccalloc(kernel->w * kernel->h + 2, xcb_render_fixed_t);
static const char *filter = "convolution";
buf[0] = DOUBLE_TO_XFIXED(kernel->w);
buf[1] = DOUBLE_TO_XFIXED(kernel->h);
for (int i = 0; i < kernel->w * kernel->h; i++) {
buf[i + 2] = DOUBLE_TO_XFIXED(kernel->data[i]);
}
xcb_render_set_picture_filter(c, pict, sizeof(filter), filter, kernel->w * kernel->h + 2, buf);
free(buf);
}