void draw_composite(cairo_blend_instance_t* inst, unsigned char* out, unsigned char* dst, unsigned char* src, double time)
{
int w = inst->width;
int h = inst->height;
int stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, w);
cairo_surface_t* out_image = cairo_image_surface_create_for_data (out,
CAIRO_FORMAT_ARGB32,
w,
h,
stride);
cairo_t* cr = cairo_create (out_image);
cairo_surface_t* dst_image = cairo_image_surface_create_for_data (dst,
CAIRO_FORMAT_ARGB32,
w,
h,
stride);
cairo_surface_t* src_image = cairo_image_surface_create_for_data ((unsigned char*)src,
CAIRO_FORMAT_ARGB32,
w,
h,
stride);
// Draw bg on surface
cairo_set_source_surface (cr, dst_image, 0, 0);
cairo_paint (cr);
// Set source, blen mode and draw with current opacity
frei0r_cairo_set_operator(cr, inst->blend_mode);
cairo_set_source_surface (cr, src_image, 0, 0);
cairo_paint_with_alpha (cr, inst->opacity);
cairo_surface_destroy (out_image);
cairo_surface_destroy (src_image);
cairo_surface_destroy (dst_image);
cairo_destroy (cr);
}
void draw_composite(cairo_affineblend_instance_t* inst, unsigned char* out, unsigned char* dst, unsigned char* src, double time)
{
int w = inst->width;
int h = inst->height;
int stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, w);
cairo_surface_t* out_image = cairo_image_surface_create_for_data (out,
CAIRO_FORMAT_ARGB32,
w,
h,
stride);
cairo_t* cr = cairo_create (out_image);
cairo_surface_t* dst_image = cairo_image_surface_create_for_data (dst,
CAIRO_FORMAT_ARGB32,
w,
h,
stride);
cairo_surface_t* src_image = cairo_image_surface_create_for_data ((unsigned char*)src,
CAIRO_FORMAT_ARGB32,
w,
h,
stride);
// Draw bg on surface
cairo_set_source_surface (cr, dst_image, 0, 0);
cairo_paint (cr);
double x_scale = frei0r_cairo_get_scale (inst->x_scale);
double y_scale = frei0r_cairo_get_scale (inst->y_scale);
//--- Get scaled and rotated anchor offsets.
double anchorX = -(x_scale * inst->anchor_x * inst->width);
double anchorY = -(y_scale * inst->anchor_y * inst->height);
double angleRad = inst->rotation * 360.0 * PI/180.0;
double sinVal = sin (angleRad);
double cosVal = cos (angleRad);
double anchor_rot_x = anchorX * cosVal - anchorY * sinVal;
double anchor_rot_y = anchorX * sinVal + anchorY * cosVal;
// Get interpreted x and y translation
double x_trans = frei0r_cairo_get_pixel_position (inst->x, inst->width);
double y_trans = frei0r_cairo_get_pixel_position (inst->y, inst->height);
//--- Get total translation to image tot left with scaling and rotation.
double x_trans_tot = x_trans + anchor_rot_x;
double y_trans_tot = y_trans + anchor_rot_y;
cairo_translate (cr, x_trans_tot, y_trans_tot);
cairo_rotate (cr, inst->rotation * 360.0 * PI/180.0);
cairo_scale (cr, x_scale, y_scale);
frei0r_cairo_set_operator(cr, inst->blend_mode);
// Set source and draw with current mix
cairo_set_source_surface (cr, src_image, 0, 0);
cairo_paint_with_alpha (cr, inst->mix);
cairo_surface_destroy (out_image);
cairo_surface_destroy (src_image);
cairo_surface_destroy (dst_image);
cairo_destroy (cr);
}
