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2000-01-05 Owen Taylor <otaylor@redhat.com> * gdk-pixbuf/pixops/: Directory full of pixel data scaling code that will eventually migrate into libart. * configure.in acconfig.h: Add checks for MMX compiler support * gdk-pixbuf/gdk-pixbuf.h gdk-pixbuf/gdk-pixbuf-scale.c: Nice wrapper routines for the code in pixops that operate on pixbufs instead of raw data. * gdk-pixbuf/testpixbuf-scale: Test program for scaling routines.
215 lines
8.0 KiB
C
215 lines
8.0 KiB
C
#include "gdk-pixbuf.h"
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#include "pixops/pixops.h"
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#include "math.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:
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* @dest_y:
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* @dest_width:
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* @dest_height:
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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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* @filter_level: the filter quality 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 (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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ArtFilterLevel filter_level)
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{
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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->art_pixbuf->pixels + dest_y * dest->art_pixbuf->rowstride + dest_x * dest->art_pixbuf->n_channels,
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-offset_x, -offset_y, dest_width - offset_x, dest_height - offset_y,
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dest->art_pixbuf->rowstride, dest->art_pixbuf->n_channels, dest->art_pixbuf->has_alpha,
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src->art_pixbuf->pixels, src->art_pixbuf->width, src->art_pixbuf->height,
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src->art_pixbuf->rowstride, src->art_pixbuf->n_channels, src->art_pixbuf->has_alpha,
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scale_x, scale_y, filter_level);
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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:
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* @dest_y:
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* @dest_width:
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* @dest_height:
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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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* @filter_level: the filter quality 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 (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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ArtFilterLevel filter_level,
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int overall_alpha)
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{
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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->art_pixbuf->pixels + dest_y * dest->art_pixbuf->rowstride + dest_x * dest->art_pixbuf->n_channels,
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-offset_x, -offset_y, dest_width - offset_x, dest_height - offset_y,
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dest->art_pixbuf->rowstride, dest->art_pixbuf->n_channels, dest->art_pixbuf->has_alpha,
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src->art_pixbuf->pixels, src->art_pixbuf->width, src->art_pixbuf->height,
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src->art_pixbuf->rowstride, src->art_pixbuf->n_channels, src->art_pixbuf->has_alpha,
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scale_x, scale_y, filter_level, 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:
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* @dest_y:
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* @dest_width:
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* @dest_height:
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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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* @filter_level: the filter quality 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 (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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ArtFilterLevel filter_level,
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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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art_u32 color1,
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art_u32 color2)
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{
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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->art_pixbuf->pixels + dest_y * dest->art_pixbuf->rowstride + dest_x * dest->art_pixbuf->n_channels,
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-offset_x, -offset_y, dest_width - offset_x, dest_height - offset_y,
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dest->art_pixbuf->rowstride, dest->art_pixbuf->n_channels, dest->art_pixbuf->has_alpha,
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src->art_pixbuf->pixels, src->art_pixbuf->width, src->art_pixbuf->height,
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src->art_pixbuf->rowstride, src->art_pixbuf->n_channels, src->art_pixbuf->has_alpha,
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scale_x, scale_y, filter_level, overall_alpha, check_x, check_y, 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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* @filter_level: the filter quality 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
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**/
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GdkPixbuf *
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gdk_pixbuf_scale_simple (GdkPixbuf *src,
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int dest_width,
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int dest_height,
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ArtFilterLevel filter_level)
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{
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GdkPixbuf *dest = gdk_pixbuf_new (ART_PIX_RGB, src->art_pixbuf->has_alpha, 8, dest_width, dest_height);
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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->art_pixbuf->width,
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(double)dest_height / src->art_pixbuf->height,
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filter_level);
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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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* @filter_level: the filter quality 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
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**/
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GdkPixbuf *
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gdk_pixbuf_composite_color_simple (GdkPixbuf *src,
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int dest_width,
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int dest_height,
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ArtFilterLevel filter_level,
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int overall_alpha,
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int check_size,
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art_u32 color1,
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art_u32 color2)
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{
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GdkPixbuf *dest = gdk_pixbuf_new (ART_PIX_RGB, src->art_pixbuf->has_alpha, 8, dest_width, dest_height);
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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->art_pixbuf->width,
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(double)dest_height / src->art_pixbuf->height,
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filter_level, overall_alpha, 0, 0, check_size, color1, color2);
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return dest;
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}
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