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829ed02435
2000-04-11 Federico Mena Quintero <federico@helixcode.com> Most of this patch is based on a patch by Havoc Pennington (hp@redhat.com) to make GdkPixbuf's structures opaque and to remove the libart dependency. * gdk-pixbuf/gdk-pixbuf.h: Removed the public structures. (GdkColorspace): New enum that for now only contains GDK_COLORSPACE_RGB. (GdkPixbufDestroyNotify): New type for the pixbuf's pixels destroy notification function. (GdkInterpType): New num with interpolation types. * *.[ch]: Replace the libart stuff with our own stuff. * pixops/*.[ch]: Likewise. * gdk-pixbuf/gdk-pixbuf-private.h: New file with the private declarations of the GdkPixbuf structures. * gdk-pixbuf/gdk-pixbuf.c (gdk_pixbuf_new_from_art_pixbuf): Removed function. (gdk_pixbuf_get_format): Constify. (gdk_pixbuf_get_n_channels): Constify. (gdk_pixbuf_get_has_alpha): Constify. (gdk_pixbuf_get_bits_per_sample): Constify. (gdk_pixbuf_get_pixels): Constify. (gdk_pixbuf_get_width): Constify. (gdk_pixbuf_get_height): Constify. (gdk_pixbuf_get_rowstride): Constify. * gdk-pixbuf/gdk-pixbuf.c (gdk_pixbuf_copy): New function to copy a pixbuf. * gdk-pixbuf/gdk-pixbuf-data.c (gdk_pixbuf_new_from_data): Added a bits_per_sample argument; currently only 8 bits per sample are supported. * gdk-pixbuf/gdk-pixbuf-animation.c (gdk_pixbuf_frame_get_pixbuf): New accessor. (gdk_pixbuf_frame_get_x_offset): New accessor. (gdk_pixbuf_frame_get_y_offset): New accessor. (gdk_pixbuf_frame_get_delay_time): New accessor. (gdk_pixbuf_frame_get_action): New accessor. * gdk-pixbuf/gdk-pixbuf-render.c (gdk_pixbuf_render_pixmap_and_mask): Instead of returning a solid mask rectangle for pixbufs without an alpha channel, set the *mask_return to NULL. * gdk-pixbuf/gdk-pixbuf-util.c (gdk_pixbuf_add_alpha): Constify. * gdk-pixbuf/gdk-pixbuf-scale.c: Fix includes. * gdk-pixbuf/gdk-pixbuf-scale.c (gdk_pixbuf_scale): Added some preconditions. Maybe we should also check for the colorspace, bits per pixel, and such. (gdk_pixbuf_composite): Likewise. (gdk_pixbuf_composite_color): Likewise. (gdk_pixbuf_scale_simple): Likewise, and fail gracefully if we cannot allocate the new pixbuf. (gdk_pixbuf_composite_color_simple): Likewise. * gdk-pixbuf/gnome-canvas-pixbuf.c (gnome_canvas_pixbuf_render): Use art_rgb_rgba_affine() or art_rgb_affine() since we no longer have an ArtPixBuf. * gdk-pixbuf/io-bmp.c: Fix includes. * gdk-pixbuf/pixops/pixops.c (pixops_scale_nearest): Fixed cast in an lvalue. * TODO: Populated. * configure.in: Removed checks for libart. * gdk-pixbuf/Makefile.am: Removed references to libart. (noinst_HEADERS): Added gdk-pixbuf-private.h. * gdk-pixbuf/Makefile.am (libgdk_pixbuf_la_LDFLAGS): Incremented the version number of the libtool library to indicate that this definitely is not compatible with the old usage. I know you love me. I know you do. * configure.in: Bumped version number to 0.7.0. * README: Updated. * gdk-pixbuf-config.in (--libs): We no longer require libart. * DEPENDS.libgdk_pixbuf: We no longer depend on libart. * gdk-pixbuf.spec.in: Updated, but I don't guarantee anything.
274 lines
10 KiB
C
274 lines
10 KiB
C
/* GdkPixbuf library - Scaling and compositing functions
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*
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* Copyright (C) 1999 The Free Software Foundation
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*
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* Author: Owen Taylor <otaylor@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <config.h>
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#include <math.h>
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#include "gdk-pixbuf-private.h"
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#include "pixops/pixops.h"
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/**
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* gdk_pixbuf_scale:
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* @src: a #GdkPixbuf
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* @dest: the #GdkPixbuf into which to render the results
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* @dest_x: the left coordinate for region to render
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* @dest_y: the top coordinate for region to render
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* @dest_width: the width of the region to render
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* @dest_height: the height of the region to render
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* @offset_x: the offset in the X direction (currently rounded to an integer)
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* @offset_y: the offset in the Y direction (currently rounded to an integer)
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* @scale_x: the scale factor in the X direction
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* @scale_y: the scale factor in the Y direction
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* @interp_type: the interpolation type for the transformation.
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*
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* Transforms the image by source image by scaling by @scale_x and @scale_y then
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* translating by @offset_x and @offset_y, then renders the rectangle
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* (@dest,@dest_y,@dest_width,@dest_height) of the resulting image onto the
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* destination drawable replacing the previous contents.
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**/
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void
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gdk_pixbuf_scale (const GdkPixbuf *src,
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GdkPixbuf *dest,
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int dest_x,
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int dest_y,
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int dest_width,
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int dest_height,
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double offset_x,
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double offset_y,
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double scale_x,
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double scale_y,
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GdkInterpType interp_type)
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{
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g_return_if_fail (src != NULL);
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g_return_if_fail (dest != NULL);
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g_return_if_fail (dest_x >= 0 && dest_x + dest_width <= dest->width);
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g_return_if_fail (dest_y >= 0 && dest_y + dest_height <= dest->height);
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offset_x = floor (offset_x + 0.5);
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offset_y = floor (offset_y + 0.5);
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pixops_scale (dest->pixels + dest_y * dest->rowstride + dest_x * dest->n_channels,
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-offset_x, -offset_y, dest_width - offset_x, dest_height - offset_y,
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dest->rowstride, dest->n_channels, dest->has_alpha,
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src->pixels, src->width, src->height,
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src->rowstride, src->n_channels, src->has_alpha,
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scale_x, scale_y, interp_type);
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}
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/**
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* gdk_pixbuf_composite:
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* @src: a #GdkPixbuf
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* @dest: the #GdkPixbuf into which to render the results
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* @dest_x: the left coordinate for region to render
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* @dest_y: the top coordinate for region to render
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* @dest_width: the width of the region to render
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* @dest_height: the height of the region to render
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* @offset_x: the offset in the X direction (currently rounded to an integer)
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* @offset_y: the offset in the Y direction (currently rounded to an integer)
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* @scale_x: the scale factor in the X direction
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* @scale_y: the scale factor in the Y direction
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* @interp_type: the interpolation type for the transformation.
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* @overall_alpha: overall alpha for source image (0..255)
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*
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* Transforms the image by source image by scaling by @scale_x and @scale_y then
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* translating by @offset_x and @offset_y, then composites the rectangle
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* (@dest,@dest_y,@dest_width,@dest_height) of the resulting image onto the
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* destination drawable.
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**/
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void
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gdk_pixbuf_composite (const GdkPixbuf *src,
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GdkPixbuf *dest,
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int dest_x,
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int dest_y,
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int dest_width,
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int dest_height,
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double offset_x,
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double offset_y,
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double scale_x,
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double scale_y,
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GdkInterpType interp_type,
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int overall_alpha)
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{
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g_return_if_fail (src != NULL);
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g_return_if_fail (dest != NULL);
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g_return_if_fail (dest_x >= 0 && dest_x + dest_width <= dest->width);
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g_return_if_fail (dest_y >= 0 && dest_y + dest_height <= dest->height);
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g_return_if_fail (overall_alpha >= 0 && overall_alpha <= 255);
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offset_x = floor (offset_x + 0.5);
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offset_y = floor (offset_y + 0.5);
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pixops_composite (dest->pixels + dest_y * dest->rowstride + dest_x * dest->n_channels,
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-offset_x, -offset_y, dest_width - offset_x, dest_height - offset_y,
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dest->rowstride, dest->n_channels, dest->has_alpha,
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src->pixels, src->width, src->height,
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src->rowstride, src->n_channels, src->has_alpha,
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scale_x, scale_y, interp_type, overall_alpha);
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}
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/**
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* gdk_pixbuf_composite_color:
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* @src: a #GdkPixbuf
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* @dest: the #GdkPixbuf into which to render the results
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* @dest_x: the left coordinate for region to render
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* @dest_y: the top coordinate for region to render
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* @dest_width: the width of the region to render
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* @dest_height: the height of the region to render
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* @offset_x: the offset in the X direction (currently rounded to an integer)
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* @offset_y: the offset in the Y direction (currently rounded to an integer)
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* @scale_x: the scale factor in the X direction
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* @scale_y: the scale factor in the Y direction
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* @interp_type: the interpolation type for the transformation.
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* @overall_alpha: overall alpha for source image (0..255)
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* @check_x: the X offset for the checkboard (origin of checkboard is at -@check_x, -@check_y)
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* @check_y: the Y offset for the checkboard
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* @check_size: the size of checks in the checkboard (must be a power of two)
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* @color1: the color of check at upper left
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* @color2: the color of the other check
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*
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* Transforms the image by source image by scaling by @scale_x and @scale_y then
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* translating by @offset_x and @offset_y, then composites the rectangle
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* (@dest,@dest_y,@dest_width,@dest_height) of the resulting image with
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* a checkboard of the colors @color1 and @color2 and renders it onto the
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* destination drawable.
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**/
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void
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gdk_pixbuf_composite_color (const GdkPixbuf *src,
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GdkPixbuf *dest,
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int dest_x,
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int dest_y,
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int dest_width,
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int dest_height,
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double offset_x,
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double offset_y,
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double scale_x,
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double scale_y,
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GdkInterpType interp_type,
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int overall_alpha,
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int check_x,
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int check_y,
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int check_size,
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guint32 color1,
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guint32 color2)
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{
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g_return_if_fail (src != NULL);
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g_return_if_fail (dest != NULL);
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g_return_if_fail (dest_x >= 0 && dest_x + dest_width <= dest->width);
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g_return_if_fail (dest_y >= 0 && dest_y + dest_height <= dest->height);
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g_return_if_fail (overall_alpha >= 0 && overall_alpha <= 255);
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offset_x = floor (offset_x + 0.5);
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offset_y = floor (offset_y + 0.5);
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pixops_composite_color (dest->pixels + dest_y * dest->rowstride + dest_x * dest->n_channels,
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-offset_x, -offset_y, dest_width - offset_x, dest_height - offset_y,
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dest->rowstride, dest->n_channels, dest->has_alpha,
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src->pixels, src->width, src->height,
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src->rowstride, src->n_channels, src->has_alpha,
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scale_x, scale_y, interp_type, overall_alpha, check_x, check_y,
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check_size, color1, color2);
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}
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/**
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* gdk_pixbuf_scale_simple:
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* @src: a #GdkPixbuf
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* @dest_width: the width of destination image
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* @dest_height: the height of destination image
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* @interp_type: the interpolation type for the transformation.
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*
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* Scale the #GdkPixbuf @src to @dest_width x @dest_height and render the result into
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* a new #GdkPixbuf.
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*
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* Return value: the new #GdkPixbuf, or NULL if not enough memory could be
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* allocated for it.
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**/
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GdkPixbuf *
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gdk_pixbuf_scale_simple (const GdkPixbuf *src,
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int dest_width,
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int dest_height,
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GdkInterpType interp_type)
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{
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GdkPixbuf *dest;
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g_return_val_if_fail (src != NULL, NULL);
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g_return_val_if_fail (dest_width > 0, NULL);
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g_return_val_if_fail (dest_height > 0, NULL);
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dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB, src->has_alpha, 8, dest_width, dest_height);
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if (!dest)
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return NULL;
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gdk_pixbuf_scale (src, dest, 0, 0, dest_width, dest_height, 0, 0,
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(double) dest_width / src->width,
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(double) dest_height / src->height,
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interp_type);
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return dest;
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}
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/**
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* gdk_pixbuf_composite_color_simple:
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* @src: a #GdkPixbuf
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* @dest_width: the width of destination image
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* @dest_height: the height of destination image
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* @interp_type: the interpolation type for the transformation.
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* @overall_alpha: overall alpha for source image (0..255)
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* @check_size: the size of checks in the checkboard (must be a power of two)
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* @color1: the color of check at upper left
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* @color2: the color of the other check
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*
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* Scale the #GdkPixbuf @src to @dest_width x @dest_height composite the result with
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* a checkboard of colors @color1 and @color2 and render the result into
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* a new #GdkPixbuf.
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*
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* Return value: the new #GdkPixbuf, or NULL if not enough memory could be
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* allocated for it.
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**/
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GdkPixbuf *
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gdk_pixbuf_composite_color_simple (const GdkPixbuf *src,
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int dest_width,
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int dest_height,
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GdkInterpType interp_type,
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int overall_alpha,
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int check_size,
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guint32 color1,
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guint32 color2)
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{
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GdkPixbuf *dest;
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g_return_val_if_fail (src != NULL, NULL);
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g_return_val_if_fail (dest_width > 0, NULL);
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g_return_val_if_fail (dest_height > 0, NULL);
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g_return_val_if_fail (overall_alpha >= 0 && overall_alpha <= 255, NULL);
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dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB, src->has_alpha, 8, dest_width, dest_height);
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if (!dest)
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return NULL;
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gdk_pixbuf_composite_color (src, dest, 0, 0, dest_width, dest_height, 0, 0,
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(double) dest_width / src->width,
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(double) dest_height / src->height,
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interp_type, overall_alpha, 0, 0, check_size, color1, color2);
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return dest;
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}
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