Drew DeVault
8 years ago
parent
eccf0b2598
commit
632bb948b7
@ -0,0 +1,123 @@
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#define _XOPEN_SOURCE 500
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#include <assert.h>
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#include <cairo/cairo.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <pango/pangocairo.h>
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#include <unistd.h>
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#include <wayland-client.h>
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#include "buffer_pool.h"
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static int create_pool_file(size_t size, char **name) {
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static const char template[] = "sway-client-XXXXXX";
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const char *path = getenv("XDG_RUNTIME_DIR");
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if (!path) {
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return -1;
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}
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int ts = (path[strlen(path) - 1] == '/');
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*name = malloc(
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strlen(template) +
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strlen(path) +
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(ts ? 0 : 1) + 1);
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sprintf(*name, "%s%s%s", path, ts ? "" : "/", template);
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int fd = mkstemp(*name);
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if (fd < 0) {
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return -1;
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}
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if (ftruncate(fd, size) < 0) {
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close(fd);
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return -1;
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}
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return fd;
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}
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static void buffer_release(void *data, struct wl_buffer *wl_buffer) {
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struct pool_buffer *buffer = data;
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buffer->busy = false;
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}
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static const struct wl_buffer_listener buffer_listener = {
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.release = buffer_release
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};
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static struct pool_buffer *create_buffer(struct wl_shm *shm,
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struct pool_buffer *buf, int32_t width, int32_t height,
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uint32_t format) {
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uint32_t stride = width * 4;
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uint32_t size = stride * height;
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char *name;
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int fd = create_pool_file(size, &name);
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assert(fd);
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void *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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struct wl_shm_pool *pool = wl_shm_create_pool(shm, fd, size);
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buf->buffer = wl_shm_pool_create_buffer(pool, 0,
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width, height, stride, format);
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wl_shm_pool_destroy(pool);
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close(fd);
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unlink(name);
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free(name);
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fd = -1;
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buf->width = width;
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buf->height = height;
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buf->surface = cairo_image_surface_create_for_data(data,
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CAIRO_FORMAT_ARGB32, width, height, stride);
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buf->cairo = cairo_create(buf->surface);
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buf->pango = pango_cairo_create_context(buf->cairo);
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wl_buffer_add_listener(buf->buffer, &buffer_listener, buf);
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return buf;
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}
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static void destroy_buffer(struct pool_buffer *buffer) {
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if (buffer->buffer) {
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wl_buffer_destroy(buffer->buffer);
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}
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if (buffer->cairo) {
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cairo_destroy(buffer->cairo);
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}
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if (buffer->surface) {
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cairo_surface_destroy(buffer->surface);
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}
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if (buffer->pango) {
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g_object_unref(buffer->pango);
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}
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memset(buffer, 0, sizeof(struct pool_buffer));
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}
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struct pool_buffer *get_next_buffer(struct wl_shm *shm,
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struct pool_buffer pool[static 2], uint32_t width, uint32_t height) {
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struct pool_buffer *buffer = NULL;
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for (size_t i = 0; i < 2; ++i) {
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if (pool[i].busy) {
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continue;
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}
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buffer = &pool[i];
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}
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if (!buffer) {
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return NULL;
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}
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if (buffer->width != width || buffer->height != height) {
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destroy_buffer(buffer);
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}
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if (!buffer->buffer) {
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if (!create_buffer(shm, buffer, width, height,
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WL_SHM_FORMAT_ARGB8888)) {
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return NULL;
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}
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}
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return buffer;
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}
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@ -0,0 +1,21 @@
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deps = [
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cairo,
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pango,
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pangocairo,
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wlroots,
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wayland_client,
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]
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if gdk_pixbuf.found()
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deps += [gdk_pixbuf]
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endif
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lib_sway_client = static_library(
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'sway-client',
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files(
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'buffer-pool.c',
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),
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dependencies: deps,
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link_with: [lib_sway_common],
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include_directories: sway_inc
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)
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@ -0,0 +1,127 @@
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#include <stdint.h>
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#include <cairo/cairo.h>
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#include "cairo.h"
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#ifdef WITH_GDK_PIXBUF
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#endif
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void cairo_set_source_u32(cairo_t *cairo, uint32_t color) {
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cairo_set_source_rgba(cairo,
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(color >> (3*8) & 0xFF) / 255.0,
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(color >> (2*8) & 0xFF) / 255.0,
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(color >> (1*8) & 0xFF) / 255.0,
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(color >> (0*8) & 0xFF) / 255.0);
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}
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cairo_surface_t *cairo_image_surface_scale(cairo_surface_t *image,
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int width, int height) {
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int image_width = cairo_image_surface_get_width(image);
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int image_height = cairo_image_surface_get_height(image);
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cairo_surface_t *new =
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cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
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cairo_t *cairo = cairo_create(new);
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cairo_scale(cairo, (double)width / image_width,
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(double)height / image_height);
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cairo_set_source_surface(cairo, image, 0, 0);
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cairo_paint(cairo);
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cairo_destroy(cairo);
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return new;
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}
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#ifdef WITH_GDK_PIXBUF
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cairo_surface_t* gdk_cairo_image_surface_create_from_pixbuf(const GdkPixbuf *gdkbuf) {
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int chan = gdk_pixbuf_get_n_channels(gdkbuf);
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if (chan < 3) {
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return NULL;
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}
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const guint8* gdkpix = gdk_pixbuf_read_pixels(gdkbuf);
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if (!gdkpix) {
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return NULL;
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}
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gint w = gdk_pixbuf_get_width(gdkbuf);
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gint h = gdk_pixbuf_get_height(gdkbuf);
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int stride = gdk_pixbuf_get_rowstride(gdkbuf);
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cairo_format_t fmt = (chan == 3) ? CAIRO_FORMAT_RGB24 : CAIRO_FORMAT_ARGB32;
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cairo_surface_t * cs = cairo_image_surface_create (fmt, w, h);
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cairo_surface_flush (cs);
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if ( !cs || cairo_surface_status(cs) != CAIRO_STATUS_SUCCESS) {
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return NULL;
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}
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int cstride = cairo_image_surface_get_stride(cs);
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unsigned char * cpix = cairo_image_surface_get_data(cs);
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if (chan == 3) {
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int i;
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for (i = h; i; --i) {
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const guint8 *gp = gdkpix;
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unsigned char *cp = cpix;
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const guint8* end = gp + 3*w;
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while (gp < end) {
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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cp[0] = gp[2];
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cp[1] = gp[1];
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cp[2] = gp[0];
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#else
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cp[1] = gp[0];
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cp[2] = gp[1];
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cp[3] = gp[2];
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#endif
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gp += 3;
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cp += 4;
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}
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gdkpix += stride;
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cpix += cstride;
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}
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} else {
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/* premul-color = alpha/255 * color/255 * 255 = (alpha*color)/255
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* (z/255) = z/256 * 256/255 = z/256 (1 + 1/255)
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* = z/256 + (z/256)/255 = (z + z/255)/256
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* # recurse once
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* = (z + (z + z/255)/256)/256
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* = (z + z/256 + z/256/255) / 256
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* # only use 16bit uint operations, loose some precision,
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* # result is floored.
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* -> (z + z>>8)>>8
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* # add 0x80/255 = 0.5 to convert floor to round
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* => (z+0x80 + (z+0x80)>>8 ) >> 8
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* ------
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* tested as equal to lround(z/255.0) for uint z in [0..0xfe02]
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*/
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#define PREMUL_ALPHA(x,a,b,z) \
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G_STMT_START { z = a * b + 0x80; x = (z + (z >> 8)) >> 8; } \
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G_STMT_END
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int i;
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for (i = h; i; --i) {
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const guint8 *gp = gdkpix;
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unsigned char *cp = cpix;
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const guint8* end = gp + 4*w;
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guint z1, z2, z3;
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while (gp < end) {
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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PREMUL_ALPHA(cp[0], gp[2], gp[3], z1);
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PREMUL_ALPHA(cp[1], gp[1], gp[3], z2);
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PREMUL_ALPHA(cp[2], gp[0], gp[3], z3);
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cp[3] = gp[3];
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#else
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PREMUL_ALPHA(cp[1], gp[0], gp[3], z1);
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PREMUL_ALPHA(cp[2], gp[1], gp[3], z2);
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PREMUL_ALPHA(cp[3], gp[2], gp[3], z3);
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cp[0] = gp[3];
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#endif
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gp += 4;
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cp += 4;
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}
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gdkpix += stride;
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cpix += cstride;
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}
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#undef PREMUL_ALPHA
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}
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cairo_surface_mark_dirty(cs);
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return cs;
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}
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#endif //WITH_GDK_PIXBUF
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@ -1,12 +1,23 @@
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lib_sway_common = static_library('sway-common',
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deps = [
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cairo,
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wlroots
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]
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if gdk_pixbuf.found()
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deps += [gdk_pixbuf]
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endif
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lib_sway_common = static_library(
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'sway-common',
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files(
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'cairo.c',
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'ipc-client.c',
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'log.c',
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'list.c',
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'util.c',
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'stringop.c',
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'readline.c',
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'ipc-client.c'
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'stringop.c',
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'util.c'
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),
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dependencies: [ wlroots ],
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dependencies: deps,
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include_directories: sway_inc
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)
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@ -0,0 +1,21 @@
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#ifndef _SWAY_BUFFERS_H
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#define _SWAY_BUFFERS_H
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#include <cairo/cairo.h>
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#include <pango/pangocairo.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <wayland-client.h>
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struct pool_buffer {
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struct wl_buffer *buffer;
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cairo_surface_t *surface;
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cairo_t *cairo;
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PangoContext *pango;
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uint32_t width, height;
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bool busy;
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};
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struct pool_buffer *get_next_buffer(struct wl_shm *shm,
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struct pool_buffer pool[static 2], uint32_t width, uint32_t height);
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#endif
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@ -0,0 +1,18 @@
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#ifndef _SWAY_CAIRO_H
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#define _SWAY_CAIRO_H
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#include <stdint.h>
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#include <cairo/cairo.h>
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void cairo_set_source_u32(cairo_t *cairo, uint32_t color);
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cairo_surface_t *cairo_image_surface_scale(cairo_surface_t *image,
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int width, int height);
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#ifdef WITH_GDK_PIXBUF
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#include <gdk-pixbuf/gdk-pixbuf.h>
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cairo_surface_t* gdk_cairo_image_surface_create_from_pixbuf(
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const GdkPixbuf *gdkbuf);
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#endif //WITH_GDK_PIXBUF
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#endif
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@ -1,8 +1,22 @@
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deps = [
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cairo,
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jsonc,
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math,
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pango,
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pangocairo,
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sway_protos,
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wayland_client,
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]
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if gdk_pixbuf.found()
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deps += [gdk_pixbuf]
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endif
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executable(
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'swaybg',
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'main.c',
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include_directories: [sway_inc],
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dependencies: [wayland_client, sway_protos, jsonc, wlroots],
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link_with: [lib_sway_common],
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dependencies: deps,
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link_with: [lib_sway_common, lib_sway_client],
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install: true
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)
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