28#include <webp/decode.h>
30static const char*
const kStatusMessages[] = {
31 "OK",
"OUT_OF_MEMORY",
"INVALID_PARAM",
"BITSTREAM_ERROR",
32 "UNSUPPORTED_FEATURE",
"SUSPENDED",
"USER_ABORT",
"NOT_ENOUGH_DATA"
41 cairo_surface_destroy(us->
data);
44static cairo_surface_t* webp_really_loadimage(
const char *in_file, FILE*
const in)
46 WebPDecoderConfig config;
47 WebPDecBuffer*
const output_buffer = &config.output;
48 WebPBitstreamFeatures*
const bitstream = &config.input;
49 VP8StatusCode status = VP8_STATUS_OK;
50 cairo_surface_t *surface =
NULL;
54 if (!WebPInitDecoderConfig(&config)) {
55 fprintf(stderr,
"Error: WebP library version mismatch!\n");
59 fseek(in, 0, SEEK_END);
60 const size_t data_size =
gv_ftell(in);
63 ok = data_size == 0 || (
data !=
NULL && fread(
data, data_size, 1, in) == 1);
65 fprintf(stderr,
"Error: WebP could not read %" PRISIZE_T
66 " bytes of data from %s\n", data_size, in_file);
71 status = WebPGetFeatures(
data, data_size, bitstream);
72 if (status != VP8_STATUS_OK) {
76 output_buffer->colorspace = MODE_RGBA;
77 status = WebPDecode(
data, data_size, &config);
80 if (! bitstream->has_alpha) {
81 assert(output_buffer->width >= 0);
82 assert(output_buffer->height >= 0);
83 argb2rgba((
size_t)output_buffer->width, (
size_t)output_buffer->height,
84 output_buffer->u.RGBA.rgba);
89 ok = status == VP8_STATUS_OK;
91 fprintf(stderr,
"Error: WebP decoding of %s failed.\n", in_file);
92 fprintf(stderr,
"Status: %d (%s)\n", status, kStatusMessages[status]);
96 surface = cairo_image_surface_create_for_data (
97 output_buffer->u.RGBA.rgba,
100 output_buffer->height,
101 output_buffer->u.RGBA.stride);
109 cairo_surface_t *surface =
NULL;
129 if ((surface = webp_really_loadimage(us->
name, us->
f)))
130 cairo_surface_reference(surface);
150 cairo_surface_t *surface;
152 surface = webp_loadimage(job, us);
155 cairo_translate(cr, b.
LL.
x, -b.
UR.
y);
156 cairo_scale(cr, (b.
UR.
x - b.
LL.
x) / us->
w, (b.
UR.
y - b.
LL.
y) / us->
h);
157 cairo_set_source_surface (cr, surface, 0, 0);
171#ifdef HAVE_PANGOCAIRO
172 {FORMAT_WEBP_CAIRO,
"webp:cairo", 1, &engine_webp,
NULL},
void gvusershape_file_release(usershape_t *us)
bool gvusershape_file_access(usershape_t *us)
static size_t gv_ftell(FILE *stream)
ftell, accounting for platform limitations
Arithmetic helper functions.
static void argb2rgba(size_t width, size_t height, unsigned char *data)
gvplugin_installed_t gvloadimage_webp_types[]
void(* datafree)(usershape_t *us)