void
SvgWindow::updateSvgContext ()
{
if (context)
{
finiTexture (context->texture[0]);
finiTexture (context->texture[1]);
}
else
{
context = new SvgContext;
if (!context)
return;
}
int x1, y1, x2, y2;
CompSize wSize;
initTexture (source, context->texture[1], context->size);
context->source = source;
wSize.setWidth (window->geometry ().width ());
wSize.setHeight (window->geometry ().height ());
decor_apply_gravity (source->p1.gravity,
source->p1.x, source->p1.y,
wSize.width (), wSize.height (),
&x1, &y1);
decor_apply_gravity (source->p2.gravity,
source->p2.x, source->p2.y,
wSize.width (), wSize.height (),
&x2, &y2);
x1 = MAX (x1, 0);
y1 = MAX (y1, 0);
x2 = MIN (x2, wSize.width ());
y2 = MIN (y2, wSize.height ());
if (!initTexture (source, context->texture[0], wSize))
{
delete context;
context = NULL;
}
else
{
renderSvg (source, context->texture[0], wSize, 0.0f, 0.0f, 1.0f, 1.0f);
initTexture (source, context->texture[1], CompSize ());
context->box += CompRect (x1, y1, x2 - x1, y2 - y1);
context->box.translate (window->geometry ().x (), window->geometry ().y ());
updateSvgMatrix ();
}
}
bool
SvgScreen::readSvgToImage (const char *file,
CompSize &size,
void *&data)
{
cairo_surface_t *surface;
std::ifstream svgFile;
GError *error = NULL;
RsvgHandle *svgHandle;
RsvgDimensionData svgDimension;
svgFile.open (file);
if (!svgFile.is_open ())
return false;
svgFile.close ();
svgHandle = rsvg_handle_new_from_file (file, &error);
if (!svgHandle)
return false;
rsvg_handle_get_dimensions (svgHandle, &svgDimension);
size.setWidth (svgDimension.width);
size.setHeight (svgDimension.height);
data = malloc (svgDimension.width * svgDimension.height * 4);
if (!data)
{
rsvg_handle_free (svgHandle);
return false;
}
surface = cairo_image_surface_create_for_data ((unsigned char *) data,
CAIRO_FORMAT_ARGB32,
svgDimension.width,
svgDimension.height,
svgDimension.width * 4);
if (surface)
{
cairo_t *cr;
cr = cairo_create (surface);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
rsvg_handle_render_cairo (svgHandle, cr);
cairo_destroy (cr);
cairo_surface_destroy (surface);
}
rsvg_handle_free (svgHandle);
return true;
}
bool
PngScreen::readPngData (png_struct *png,
png_info *info,
void *&data,
CompSize &size)
{
png_uint_32 pngWidth, pngHeight;
int depth, colorType, interlace;
unsigned int pixelSize;
png_byte **rowPointers;
char *d;
png_read_info (png, info);
png_get_IHDR (png, info,
&pngWidth, &pngHeight, &depth,
&colorType, &interlace, NULL, NULL);
size.setWidth (pngWidth);
size.setHeight (pngHeight);
/* convert palette/gray image to rgb */
if (colorType == PNG_COLOR_TYPE_PALETTE)
png_set_palette_to_rgb (png);
/* expand gray bit depth if needed */
if (colorType == PNG_COLOR_TYPE_GRAY && depth < 8)
png_set_expand_gray_1_2_4_to_8 (png);
/* transform transparency to alpha */
if (png_get_valid (png, info, PNG_INFO_tRNS))
png_set_tRNS_to_alpha (png);
if (depth == 16)
png_set_strip_16 (png);
if (depth < 8)
png_set_packing (png);
/* convert grayscale to RGB */
if (colorType == PNG_COLOR_TYPE_GRAY ||
colorType == PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb (png);
if (interlace != PNG_INTERLACE_NONE)
png_set_interlace_handling (png);
png_set_bgr (png);
png_set_filler (png, 0xff, PNG_FILLER_AFTER);
png_set_read_user_transform_fn (png, premultiplyData);
png_read_update_info (png, info);
pixelSize = 4;
d = (char *) malloc (pngWidth * pngHeight * pixelSize);
if (!d)
return false;
data = d;
rowPointers = new png_byte *[pngHeight];
if (!rowPointers)
{
free (d);
return false;
}
for (unsigned int i = 0; i < pngHeight; i++)
rowPointers[i] = (png_byte *) (d + i * pngWidth * pixelSize);
png_read_image (png, rowPointers);
png_read_end (png, info);
delete [] rowPointers;
return true;
}
