forked from AuroraMiddleware/gtk
785 lines
16 KiB
C
785 lines
16 KiB
C
#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <assert.h>
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#include <errno.h>
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#include <cairo.h>
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#include "broadway.h"
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/************************************************************************
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* Base64 functions *
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************************************************************************/
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static const char base64_alphabet[] =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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#if 0 /* Unused for now */
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static void
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base64_uint8 (guint8 v, char *c)
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{
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c[0] = base64_alphabet[(v >> 0) & 0x3f];
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c[1] = base64_alphabet[(v >> 6) & 0x3];
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}
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#endif
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static void
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base64_uint16 (guint32 v, char *c)
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{
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c[0] = base64_alphabet[(v >> 0) & 0x3f];
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c[1] = base64_alphabet[(v >> 6) & 0x3f];
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c[2] = base64_alphabet[(v >> 12) & 0xf];
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}
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#if 0
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static void
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base64_uint24 (guint32 v, char *c)
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{
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c[0] = base64_alphabet[(v >> 0) & 0x3f];
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c[1] = base64_alphabet[(v >> 6) & 0x3f];
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c[2] = base64_alphabet[(v >> 12) & 0x3f];
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c[3] = base64_alphabet[(v >> 18) & 0x3f];
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}
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#endif
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static void
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base64_uint32 (guint32 v, char *c)
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{
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c[0] = base64_alphabet[(v >> 0) & 0x3f];
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c[1] = base64_alphabet[(v >> 6) & 0x3f];
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c[2] = base64_alphabet[(v >> 12) & 0x3f];
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c[3] = base64_alphabet[(v >> 18) & 0x3f];
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c[4] = base64_alphabet[(v >> 24) & 0x3f];
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c[5] = base64_alphabet[(v >> 30) & 0x2];
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}
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/***********************************************************
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* conversion of raw image data to png data: uris *
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***********************************************************/
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struct PngTarget {
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GString *url;
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int state;
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int save;
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};
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static cairo_status_t
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write_png_url (void *closure,
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const unsigned char *data,
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unsigned int data_len)
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{
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struct PngTarget *target = closure;
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gsize res, old_len;
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old_len = target->url->len;
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g_string_set_size (target->url,
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old_len + (data_len / 3 + 1) * 4 + 4);
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res = g_base64_encode_step (data, data_len, FALSE,
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target->url->str + old_len,
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&target->state, &target->save);
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g_string_set_size (target->url, old_len + res);
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return CAIRO_STATUS_SUCCESS;
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}
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static char *
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to_png_rgb (int w, int h, int byte_stride, guint32 *data)
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{
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cairo_surface_t *surface;
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struct PngTarget target;
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gsize res, old_len;
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target.url = g_string_new ("data:image/png;base64,");
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target.state = 0;
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target.save = 0;
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surface = cairo_image_surface_create_for_data ((guchar *)data,
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CAIRO_FORMAT_RGB24, w, h, byte_stride);
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cairo_surface_write_to_png_stream (surface, write_png_url, &target);
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old_len = target.url->len;
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g_string_set_size (target.url, old_len + 4);
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res = g_base64_encode_close (FALSE,
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target.url->str + old_len,
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&target.state, &target.save);
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g_string_set_size (target.url, old_len + res);
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return g_string_free (target.url, FALSE);
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}
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static char *
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to_png_rgba (int w, int h, int byte_stride, guint32 *data)
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{
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cairo_surface_t *surface;
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struct PngTarget target;
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gsize res, old_len;
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target.url = g_string_new ("data:image/png;base64,");
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target.state = 0;
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target.save = 0;
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surface = cairo_image_surface_create_for_data ((guchar *)data,
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CAIRO_FORMAT_ARGB32, w, h, byte_stride);
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cairo_surface_write_to_png_stream (surface, write_png_url, &target);
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old_len = target.url->len;
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g_string_set_size (target.url, old_len + 4);
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res = g_base64_encode_close (FALSE,
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target.url->str + old_len,
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&target.state, &target.save);
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g_string_set_size (target.url, old_len + res);
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return g_string_free (target.url, FALSE);
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}
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#if 0
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static char *
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to_png_a (int w, int h, int byte_stride, guint8 *data)
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{
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cairo_surface_t *surface;
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struct PngTarget target;
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gsize res, old_len;
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target.url = g_string_new ("data:image/png;base64,");
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target.state = 0;
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target.save = 0;
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surface = cairo_image_surface_create_for_data (data,
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CAIRO_FORMAT_A8, w, h, byte_stride);
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cairo_surface_write_to_png_stream (surface, write_png_url, &target);
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old_len = target.url->len;
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g_string_set_size (target.url, old_len + 4);
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res = g_base64_encode_close (FALSE,
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target.url->str + old_len,
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&target.state, &target.save);
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g_string_set_size (target.url, old_len + res);
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return g_string_free (target.url, FALSE);
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}
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#endif
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/************************************************************************
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* Basic I/O primitives *
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************************************************************************/
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struct BroadwayOutput {
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GOutputStream *out;
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int error;
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guint32 serial;
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};
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static void
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broadway_output_write_header (BroadwayOutput *output)
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{
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g_output_stream_write (output->out, "\0", 1, NULL, NULL);
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}
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static void
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broadway_output_write (BroadwayOutput *output,
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const void *buf, gsize count)
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{
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g_output_stream_write_all (output->out, buf, count, NULL, NULL, NULL);
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}
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static void
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send_boundary (BroadwayOutput *output)
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{
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broadway_output_write (output, "\xff", 1);
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broadway_output_write (output, "\0", 1);
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}
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BroadwayOutput *
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broadway_output_new(GOutputStream *out, guint32 serial)
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{
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BroadwayOutput *output;
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output = g_new0 (BroadwayOutput, 1);
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output->out = g_object_ref (out);
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output->serial = serial;
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broadway_output_write_header (output);
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return output;
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}
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void
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broadway_output_free (BroadwayOutput *output)
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{
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g_object_unref (output->out);
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free (output);
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}
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guint32
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broadway_output_get_next_serial (BroadwayOutput *output)
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{
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return output->serial;
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}
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int
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broadway_output_flush (BroadwayOutput *output)
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{
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send_boundary (output);
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return !output->error;
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}
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/************************************************************************
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* Core rendering operations *
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************************************************************************/
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#define HEADER_LEN (1+6)
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static void
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append_uint16 (guint32 v, char *buf, int *p)
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{
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base64_uint16 (v, &buf[*p]);
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*p += 3;
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}
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static void
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append_uint32 (guint32 v, char *buf, int *p)
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{
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base64_uint32 (v, &buf[*p]);
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*p += 6;
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}
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static int
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write_header(BroadwayOutput *output, char *buf, char op)
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{
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int p;
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p = 0;
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buf[p++] = op;
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append_uint32 (output->serial++, buf, &p);
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return p;
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}
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void
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broadway_output_copy_rectangles (BroadwayOutput *output, int id,
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BroadwayRect *rects, int n_rects,
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int dx, int dy)
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{
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char *buf;
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int len, i, p;
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len = HEADER_LEN + 3 + 3 + 3*4*n_rects + 3 + 3;
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buf = g_malloc (len);
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p = write_header (output, buf, 'b');
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append_uint16 (id, buf, &p);
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append_uint16 (n_rects, buf, &p);
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for (i = 0; i < n_rects; i++)
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{
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append_uint16 (rects[i].x, buf, &p);
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append_uint16 (rects[i].y, buf, &p);
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append_uint16 (rects[i].width, buf, &p);
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append_uint16 (rects[i].height, buf, &p);
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}
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append_uint16 (dx, buf, &p);
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append_uint16 (dy, buf, &p);
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assert (p == len);
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broadway_output_write (output, buf, len);
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free (buf);
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}
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void
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broadway_output_grab_pointer (BroadwayOutput *output,
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int id,
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gboolean owner_event)
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{
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char buf[HEADER_LEN + 3 + 1];
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int p;
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p = write_header (output, buf, 'g');
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append_uint16 (id, buf, &p);
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buf[p++] = owner_event ? '1': '0';
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assert (p == sizeof (buf));
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broadway_output_write (output, buf, sizeof (buf));
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}
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guint32
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broadway_output_ungrab_pointer (BroadwayOutput *output)
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{
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char buf[HEADER_LEN];
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guint32 serial;
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int p;
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serial = output->serial;
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p = write_header (output, buf, 'u');
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assert (p == sizeof (buf));
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broadway_output_write (output, buf, sizeof (buf));
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return serial;
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}
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void
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broadway_output_new_surface(BroadwayOutput *output,
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int id, int x, int y, int w, int h,
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gboolean is_temp)
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{
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char buf[HEADER_LEN + 16];
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int p;
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p = write_header (output, buf, 's');
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append_uint16 (id, buf, &p);
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append_uint16 (x, buf, &p);
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append_uint16 (y, buf, &p);
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append_uint16 (w, buf, &p);
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append_uint16 (h, buf, &p);
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buf[p++] = is_temp ? '1' : '0';
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assert (p == sizeof (buf));
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broadway_output_write (output, buf, sizeof (buf));
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}
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void
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broadway_output_show_surface(BroadwayOutput *output, int id)
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{
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char buf[HEADER_LEN + 3];
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int p;
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p = write_header (output, buf, 'S');
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append_uint16 (id, buf, &p);
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assert (p == sizeof (buf));
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broadway_output_write (output, buf, sizeof (buf));
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}
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void
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broadway_output_hide_surface(BroadwayOutput *output, int id)
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{
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char buf[HEADER_LEN + 3];
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int p;
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p = write_header (output, buf, 'H');
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append_uint16 (id, buf, &p);
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assert (p == sizeof (buf));
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broadway_output_write (output, buf, sizeof (buf));
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}
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void
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broadway_output_destroy_surface(BroadwayOutput *output, int id)
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{
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char buf[HEADER_LEN + 3];
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int p;
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p = write_header (output, buf, 'd');
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append_uint16 (id, buf, &p);
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assert (p == sizeof (buf));
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broadway_output_write (output, buf, sizeof (buf));
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}
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void
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broadway_output_move_resize_surface (BroadwayOutput *output,
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int id,
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gboolean has_pos,
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int x,
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int y,
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gboolean has_size,
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int w,
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int h)
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{
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char buf[HEADER_LEN+3+1+6+6];
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int p;
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int val;
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if (!has_pos && !has_size)
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return;
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p = write_header (output, buf, 'm');
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val = (!!has_pos) | ((!!has_size) << 1);
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append_uint16 (id, buf, &p);
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buf[p++] = val + '0';
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if (has_pos)
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{
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append_uint16 (x, buf, &p);
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append_uint16 (y, buf, &p);
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}
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if (has_size)
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{
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append_uint16 (w, buf, &p);
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append_uint16 (h, buf, &p);
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}
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assert (p <= sizeof (buf));
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broadway_output_write (output, buf, p);
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}
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void
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broadway_output_set_transient_for (BroadwayOutput *output,
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int id,
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int parent_id)
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{
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char buf[HEADER_LEN + 6];
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int p;
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p = write_header (output, buf, 'p');
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append_uint16 (id, buf, &p);
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append_uint16 (parent_id, buf, &p);
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assert (p == sizeof (buf));
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broadway_output_write (output, buf, sizeof (buf));
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}
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void
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broadway_output_put_rgb (BroadwayOutput *output, int id, int x, int y,
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int w, int h, int byte_stride, void *data)
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{
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char buf[HEADER_LEN + 15];
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gsize len;
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char *url;
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int p;
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p = write_header (output, buf, 'i');
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append_uint16 (id, buf, &p);
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append_uint16 (x, buf, &p);
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append_uint16 (y, buf, &p);
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url = to_png_rgb (w, h, byte_stride, (guint32*)data);
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len = strlen (url);
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append_uint32 (len, buf, &p);
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assert (p == sizeof (buf));
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broadway_output_write (output, buf, sizeof (buf));
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broadway_output_write (output, url, len);
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free (url);
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}
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typedef struct {
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int x1, y1;
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int x2, y2;
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} BroadwayBox;
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static int
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is_any_x_set (unsigned char *data,
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int box_x1, int box_x2,
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int x1, int x2, int y, int *x_set,
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int byte_stride)
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{
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int w ;
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guint32 *ptr;
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if (x1 < box_x1)
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x1 = box_x1;
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if (x2 > box_x2)
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x2 = box_x2;
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w = x2 - x1;
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if (w > 0)
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{
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ptr = (guint32 *)(data + y * byte_stride + x1 * 4);
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while (w-- > 0)
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{
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if (*ptr != 0)
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{
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if (x_set)
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*x_set = x1;
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return 1;
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}
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ptr++;
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x1++;
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}
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}
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return 0;
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}
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#define EXTEND_X_FUZZ 10
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#define EXTEND_Y_FUZZ 10
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static int
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extend_x_range (unsigned char *data,
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int box_x1, int box_y1,
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int box_x2, int box_y2,
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int *x1, int *x2, int y,
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int byte_stride)
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{
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int extended = 0;
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int new_x;
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while (is_any_x_set (data, box_x1, box_x2, *x1 - EXTEND_X_FUZZ, *x1, y, &new_x, byte_stride))
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{
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*x1 = new_x;
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extended = 1;
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}
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while (is_any_x_set (data, box_x1, box_x2, *x2, *x2 + EXTEND_X_FUZZ, y, &new_x, byte_stride))
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{
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*x2 = new_x + 1;
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extended = 1;
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}
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return extended;
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}
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static int
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extend_y_range (unsigned char *data,
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int box_x1, int box_y1,
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int box_x2, int box_y2,
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int x1, int x2, int *y,
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int byte_stride)
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{
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int extended = 0;
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int found_set;
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int yy, y2;
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while (*y < box_y2)
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{
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found_set = 0;
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y2 = *y + EXTEND_Y_FUZZ;
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if (y2 > box_y2)
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y2 = box_y2;
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for (yy = y2; yy > *y + 1; yy--)
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{
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if (is_any_x_set (data, box_x1, box_x2, x1, x2, yy - 1, NULL, byte_stride))
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{
|
|
found_set = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!found_set)
|
|
break;
|
|
*y = yy;
|
|
extended = 1;
|
|
}
|
|
|
|
return extended;
|
|
}
|
|
|
|
|
|
static void
|
|
rgba_find_rects_extents (unsigned char *data,
|
|
int box_x1, int box_y1,
|
|
int box_x2, int box_y2,
|
|
int x, int y,
|
|
BroadwayBox *rect,
|
|
int byte_stride)
|
|
{
|
|
int x1, x2, y1, y2, yy;
|
|
int extended;
|
|
|
|
x1 = x;
|
|
x2 = x + 1;
|
|
y1 = y;
|
|
y2 = y + 1;
|
|
|
|
do
|
|
{
|
|
/* Expand maximally for all known rows */
|
|
do
|
|
{
|
|
extended = 0;
|
|
|
|
for (yy = y1; yy < y2; yy++)
|
|
extended |= extend_x_range (data,
|
|
box_x1, box_y1,
|
|
box_x2, box_y2,
|
|
&x1, &x2, yy,
|
|
byte_stride);
|
|
}
|
|
while (extended);
|
|
}
|
|
while (extend_y_range(data,
|
|
box_x1, box_y1,
|
|
box_x2, box_y2,
|
|
x1, x2, &y2,
|
|
byte_stride));
|
|
|
|
rect->x1 = x1;
|
|
rect->x2 = x2;
|
|
rect->y1 = y1;
|
|
rect->y2 = y2;
|
|
}
|
|
|
|
static void
|
|
rgba_find_rects_sub (unsigned char *data,
|
|
int box_x1, int box_y1,
|
|
int box_x2, int box_y2,
|
|
int byte_stride,
|
|
BroadwayBox **rects,
|
|
int *n_rects, int *alloc_rects)
|
|
{
|
|
guint32 *line;
|
|
BroadwayBox rect;
|
|
int x, y;
|
|
|
|
if (box_x1 == box_x2 || box_y1 == box_y2)
|
|
return;
|
|
|
|
for (y = box_y1; y < box_y2; y++)
|
|
{
|
|
line = (guint32 *)(data + y * byte_stride + box_x1 * 4);
|
|
|
|
for (x = box_x1; x < box_x2; x++)
|
|
{
|
|
if (*line != 0)
|
|
{
|
|
rgba_find_rects_extents (data,
|
|
box_x1, box_y1, box_x2, box_y2,
|
|
x, y, &rect, byte_stride);
|
|
if (*n_rects == *alloc_rects)
|
|
{
|
|
(*alloc_rects) *= 2;
|
|
*rects = g_renew (BroadwayBox, *rects, *alloc_rects);
|
|
}
|
|
(*rects)[*n_rects] = rect;
|
|
(*n_rects)++;
|
|
rgba_find_rects_sub (data,
|
|
box_x1, rect.y1,
|
|
rect.x1, rect.y2,
|
|
byte_stride,
|
|
rects, n_rects, alloc_rects);
|
|
rgba_find_rects_sub (data,
|
|
rect.x2, rect.y1,
|
|
box_x2, rect.y2,
|
|
byte_stride,
|
|
rects, n_rects, alloc_rects);
|
|
rgba_find_rects_sub (data,
|
|
box_x1, rect.y2,
|
|
box_x2, box_y2,
|
|
byte_stride,
|
|
rects, n_rects, alloc_rects);
|
|
return;
|
|
}
|
|
line++;
|
|
}
|
|
}
|
|
}
|
|
|
|
static BroadwayBox *
|
|
rgba_find_rects (unsigned char *data,
|
|
int w, int h, int byte_stride,
|
|
int *n_rects)
|
|
{
|
|
BroadwayBox *rects;
|
|
int alloc_rects;
|
|
|
|
alloc_rects = 20;
|
|
rects = g_new (BroadwayBox, alloc_rects);
|
|
|
|
*n_rects = 0;
|
|
rgba_find_rects_sub (data,
|
|
0, 0, w, h, byte_stride,
|
|
&rects, n_rects, &alloc_rects);
|
|
|
|
return rects;
|
|
}
|
|
|
|
void
|
|
broadway_output_put_rgba (BroadwayOutput *output, int id, int x, int y,
|
|
int w, int h, int byte_stride, void *data)
|
|
{
|
|
char buf[HEADER_LEN + 15];
|
|
gsize len;
|
|
char *url;
|
|
BroadwayBox *rects;
|
|
int p, i, n_rects;
|
|
guint8 *subdata;
|
|
|
|
rects = rgba_find_rects (data, w, h, byte_stride, &n_rects);
|
|
|
|
for (i = 0; i < n_rects; i++)
|
|
{
|
|
subdata = (guint8 *)data + rects[i].x1 * 4 + rects[i].y1 * byte_stride;
|
|
|
|
p = write_header (output, buf, 'i');
|
|
append_uint16 (id, buf, &p);
|
|
append_uint16 (x + rects[i].x1, buf, &p);
|
|
append_uint16 (y + rects[i].y1, buf, &p);
|
|
|
|
url = to_png_rgba (rects[i].x2 - rects[i].x1,
|
|
rects[i].y2 - rects[i].y1,
|
|
byte_stride, (guint32*)subdata);
|
|
len = strlen (url);
|
|
append_uint32 (len, buf, &p);
|
|
|
|
assert (p == sizeof (buf));
|
|
|
|
broadway_output_write (output, buf, sizeof (buf));
|
|
|
|
broadway_output_write (output, url, len);
|
|
|
|
free (url);
|
|
}
|
|
|
|
free (rects);
|
|
}
|
|
|
|
void
|
|
broadway_output_surface_flush (BroadwayOutput *output,
|
|
int id)
|
|
{
|
|
char buf[HEADER_LEN + 3];
|
|
int p;
|
|
|
|
p = write_header (output, buf, 'f');
|
|
append_uint16 (id, buf, &p);
|
|
|
|
assert (p == sizeof (buf));
|
|
|
|
broadway_output_write (output, buf, sizeof (buf));
|
|
}
|
|
|
|
#if 0
|
|
static void
|
|
send_image_a (BroadwayOutput *output, int id, int x, int y,
|
|
int w, int h, int byte_stride, guint8 *data)
|
|
{
|
|
char buf[HEADER_LEN + 15];
|
|
gsize len;
|
|
char *url;
|
|
|
|
p = write_header (output, buf, 'i');
|
|
append_uint16 (id, buf, &p);
|
|
append_uint16 (x, buf, &p);
|
|
append_uint16 (y, buf, &p);
|
|
|
|
url = to_png_a (w, h, byte_stride, data);
|
|
len = strlen (url);
|
|
append_uint32 (len, buf, &p);
|
|
|
|
assert (p == sizeof (buf));
|
|
|
|
broadway_output_write (output, buf, sizeof (buf));
|
|
|
|
broadway_output_write (output, url, len);
|
|
|
|
free (url);
|
|
}
|
|
#endif
|