/**
* gdk_pixbuf_composite_color:
* @src: a #GdkPixbuf
* @dest: the #GdkPixbuf into which to render the results
* @dest_x: the left coordinate for region to render
* @dest_y: the top coordinate for region to render
* @dest_width: the width of the region to render
* @dest_height: the height of the region to render
* @offset_x: the offset in the X direction (currently rounded to an integer)
* @offset_y: the offset in the Y direction (currently rounded to an integer)
* @scale_x: the scale factor in the X direction
* @scale_y: the scale factor in the Y direction
* @interp_type: the interpolation type for the transformation.
* @overall_alpha: overall alpha for source image (0..255)
* @check_x: the X offset for the checkboard (origin of checkboard is at -@check_x, -@check_y)
* @check_y: the Y offset for the checkboard
* @check_size: the size of checks in the checkboard (must be a power of two)
* @color1: the color of check at upper left
* @color2: the color of the other check
*
* Creates a transformation of the source image @src by scaling by
* @scale_x and @scale_y then translating by @offset_x and @offset_y,
* then composites the rectangle (@dest_x ,@dest_y, @dest_width,
* @dest_height) of the resulting image with a checkboard of the
* colors @color1 and @color2 and renders it onto the destination
* image.
*
* See gdk_pixbuf_composite_color_simple() for a simpler variant of this
* function suitable for many tasks.
*
**/
void
gdk_pixbuf_composite_color (const GdkPixbuf *src,
GdkPixbuf *dest,
int dest_x,
int dest_y,
int dest_width,
int dest_height,
double offset_x,
double offset_y,
double scale_x,
double scale_y,
GdkInterpType interp_type,
int overall_alpha,
int check_x,
int check_y,
int check_size,
guint32 color1,
guint32 color2)
{
const guint8 *src_pixels;
guint8 *dest_pixels;
g_return_if_fail (GDK_IS_PIXBUF (src));
g_return_if_fail (GDK_IS_PIXBUF (dest));
g_return_if_fail (dest_x >= 0 && dest_x + dest_width <= dest->width);
g_return_if_fail (dest_y >= 0 && dest_y + dest_height <= dest->height);
g_return_if_fail (overall_alpha >= 0 && overall_alpha <= 255);
offset_x = floor (offset_x + 0.5);
offset_y = floor (offset_y + 0.5);
/* Force an implicit copy */
dest_pixels = gdk_pixbuf_get_pixels (dest);
src_pixels = gdk_pixbuf_read_pixels (src);
_pixops_composite_color (dest_pixels, dest_width, dest_height,
dest->rowstride, dest->n_channels, dest->has_alpha,
src_pixels, src->width, src->height,
src->rowstride, src->n_channels, src->has_alpha,
dest_x, dest_y, dest_width, dest_height, offset_x,
offset_y, scale_x, scale_y,
(PixopsInterpType)interp_type, overall_alpha,
check_x, check_y, check_size, color1, color2);
}
/**
* gdk_pixbuf_composite_color:
* @src: a #GdkPixbuf
* @dest: the #GdkPixbuf into which to render the results
* @dest_x: the left coordinate for region to render
* @dest_y: the top coordinate for region to render
* @dest_width: the width of the region to render
* @dest_height: the height of the region to render
* @offset_x: the offset in the X direction (currently rounded to an integer)
* @offset_y: the offset in the Y direction (currently rounded to an integer)
* @scale_x: the scale factor in the X direction
* @scale_y: the scale factor in the Y direction
* @interp_type: the interpolation type for the transformation.
* @overall_alpha: overall alpha for source image (0..255)
* @check_x: the X offset for the checkboard (origin of checkboard is at -@check_x, -@check_y)
* @check_y: the Y offset for the checkboard
* @check_size: the size of checks in the checkboard (must be a power of two)
* @color1: the color of check at upper left
* @color2: the color of the other check
*
* Creates a transformation of the source image @src by scaling by
* @scale_x and @scale_y then translating by @offset_x and @offset_y,
* then composites the rectangle (@dest_x ,@dest_y, @dest_width,
* @dest_height) of the resulting image with a checkboard of the
* colors @color1 and @color2 and renders it onto the destination
* image.
*
* See gdk_pixbuf_composite_color_simple() for a simpler variant of this
* function suitable for many tasks.
*
**/
void
gdk_pixbuf_composite_color (const GdkPixbuf *src,
GdkPixbuf *dest,
int dest_x,
int dest_y,
int dest_width,
int dest_height,
double offset_x,
double offset_y,
double scale_x,
double scale_y,
GdkInterpType interp_type,
int overall_alpha,
int check_x,
int check_y,
int check_size,
guint32 color1,
guint32 color2)
{
g_return_if_fail (src != NULL);
g_return_if_fail (dest != NULL);
g_return_if_fail (dest_x >= 0 && dest_x + dest_width <= dest->width);
g_return_if_fail (dest_y >= 0 && dest_y + dest_height <= dest->height);
g_return_if_fail (overall_alpha >= 0 && overall_alpha <= 255);
offset_x = floor (offset_x + 0.5);
offset_y = floor (offset_y + 0.5);
_pixops_composite_color (dest->pixels, dest_width, dest_height,
dest->rowstride, dest->n_channels, dest->has_alpha,
src->pixels, src->width, src->height,
src->rowstride, src->n_channels, src->has_alpha,
dest_x, dest_y, dest_width, dest_height, offset_x,
offset_y, scale_x, scale_y,
(PixopsInterpType)interp_type, overall_alpha,
check_x, check_y, check_size, color1, color2);
}
