| 1 | /* |
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| 2 | * RGB code for drawing stuff on the panel |
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| 3 | * |
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| 4 | * Code taken from gdk-pixbuf, so parts of it are authored by: |
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| 5 | * Cody Russell <bratsche@dfw.net> |
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| 6 | * Actually I don't think it contains much if any of this code any more. |
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| 7 | * Rest is: |
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| 8 | * George Lebl <jirka@5z.com> |
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| 9 | */ |
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| 10 | #include <config.h> |
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| 11 | #include <stdio.h> |
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| 12 | #include <string.h> |
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| 13 | #include <glib.h> |
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| 14 | #include <gmodule.h> |
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| 15 | #include <gdk-pixbuf/gdk-pixbuf.h> |
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| 16 | #include <libart_lgpl/art_misc.h> |
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| 17 | #include <libart_lgpl/art_filterlevel.h> |
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| 18 | #include <libart_lgpl/art_affine.h> |
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| 19 | #include <libart_lgpl/art_rgb_affine.h> |
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| 20 | #include <libart_lgpl/art_rgb_rgba_affine.h> |
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| 21 | #include "rgb-stuff.h" |
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| 22 | |
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| 23 | void |
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| 24 | combine_rgb_rgba(guchar *dest, int dx, int dy, int dw, int dh, int drs, |
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| 25 | guchar *rgba, int rw, int rh, int rrs) |
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| 26 | { |
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| 27 | int r, g, b, a; |
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| 28 | int i,j; |
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| 29 | guchar *imgrow; |
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| 30 | guchar *dstrow; |
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| 31 | |
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| 32 | for(j=0;j<dh;j++) { |
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| 33 | imgrow = rgba + j * rrs; |
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| 34 | dstrow = dest + (dy+j) * drs + (dx*3); |
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| 35 | for(i=0;i<dw;i++) { |
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| 36 | r = *(imgrow++); |
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| 37 | g = *(imgrow++); |
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| 38 | b = *(imgrow++); |
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| 39 | a = *(imgrow++); |
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| 40 | *dstrow = (r*a + *dstrow * (255-a))>>8; |
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| 41 | dstrow++; |
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| 42 | *dstrow = (g*a + *dstrow * (255-a))>>8; |
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| 43 | dstrow++; |
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| 44 | *dstrow = (b*a + *dstrow * (255-a))>>8; |
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| 45 | dstrow++; |
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| 46 | } |
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| 47 | } |
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| 48 | } |
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| 49 | |
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| 50 | void |
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| 51 | tile_rgb(guchar *dest, int dw, int dh, int offx, int offy, int drs, |
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| 52 | guchar *tile, int w, int h, int rowstride, int has_alpha) |
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| 53 | { |
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| 54 | guchar *p; |
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| 55 | int i,j,x,y,a; |
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| 56 | guchar *imgrow; |
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| 57 | int off; |
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| 58 | |
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| 59 | p = dest; |
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| 60 | y = offy % h; |
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| 61 | off = drs - (dw*3); /*the space after width ends until next row*/ |
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| 62 | for(j=0;j<dh;j++) { |
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| 63 | x = offx % w; |
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| 64 | imgrow = tile + y * rowstride + (has_alpha?/*x*4*/x<<2:x*3); |
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| 65 | for(i=0;i<dw;i++) { |
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| 66 | *(p++) = *(imgrow++); |
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| 67 | *(p++) = *(imgrow++); |
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| 68 | *(p++) = *(imgrow++); |
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| 69 | if(has_alpha) { |
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| 70 | a = *(imgrow++); |
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| 71 | if(a!=255) { |
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| 72 | guchar *pp = p-3; |
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| 73 | pp[0] = (pp[0]*a)>>8; |
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| 74 | pp[1] = (pp[1]*a)>>8; |
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| 75 | pp[2] = (pp[2]*a)>>8; |
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| 76 | } |
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| 77 | } |
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| 78 | x++; |
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| 79 | if(x>=w) { |
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| 80 | x = 0; |
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| 81 | imgrow = tile + y * rowstride; |
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| 82 | } |
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| 83 | } |
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| 84 | p += off; |
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| 85 | y++; |
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| 86 | if(y>=h) |
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| 87 | y = 0; |
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| 88 | } |
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| 89 | } |
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| 90 | |
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| 91 | void |
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| 92 | tile_rgb_pixbuf(guchar *dest, int dw, int dh, int offx, int offy, int drs, |
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| 93 | GdkPixbuf *pbuf, int scale_w, int scale_h, int rotate) |
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| 94 | { |
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| 95 | int i,j; |
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| 96 | |
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| 97 | gdouble scaleaff[6]; |
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| 98 | gdouble affine[6]; |
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| 99 | |
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| 100 | scaleaff[1] = scaleaff[2] = scaleaff[4] = scaleaff[5] = 0; |
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| 101 | |
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| 102 | scaleaff[0] = scale_w / (double)(gdk_pixbuf_get_width(pbuf)); |
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| 103 | scaleaff[3] = scale_h / (double)(gdk_pixbuf_get_height(pbuf)); |
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| 104 | |
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| 105 | if(rotate) { |
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| 106 | int tmp; |
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| 107 | |
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| 108 | art_affine_rotate(affine,270); |
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| 109 | art_affine_multiply(scaleaff,scaleaff,affine); |
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| 110 | art_affine_translate(affine,0,scale_w); |
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| 111 | art_affine_multiply(scaleaff,scaleaff,affine); |
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| 112 | |
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| 113 | tmp = scale_h; |
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| 114 | scale_h = scale_w; |
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| 115 | scale_w = tmp; |
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| 116 | } |
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| 117 | |
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| 118 | for(i=-(offx%scale_w);i<dw;i+=scale_w) { |
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| 119 | for(j=-(offy%scale_h);j<dh;j+=scale_h) { |
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| 120 | art_affine_translate(affine,i,j); |
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| 121 | art_affine_multiply(affine,scaleaff,affine); |
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| 122 | if(gdk_pixbuf_get_has_alpha(pbuf)) |
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| 123 | art_rgb_rgba_affine(dest, |
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| 124 | 0,0,dw,dh,drs, |
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| 125 | gdk_pixbuf_get_pixels(pbuf), |
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| 126 | gdk_pixbuf_get_width(pbuf), |
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| 127 | gdk_pixbuf_get_height(pbuf), |
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| 128 | gdk_pixbuf_get_rowstride(pbuf), |
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| 129 | affine,ART_FILTER_NEAREST,NULL); |
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| 130 | else |
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| 131 | art_rgb_affine(dest, |
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| 132 | 0,0,dw,dh,drs, |
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| 133 | gdk_pixbuf_get_pixels(pbuf), |
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| 134 | gdk_pixbuf_get_width(pbuf), |
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| 135 | gdk_pixbuf_get_height(pbuf), |
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| 136 | gdk_pixbuf_get_rowstride(pbuf), |
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| 137 | affine,ART_FILTER_NEAREST,NULL); |
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| 138 | |
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| 139 | } |
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| 140 | } |
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| 141 | } |
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| 142 | |
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| 143 | #if 0 |
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| 144 | void |
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| 145 | make_scale_affine(double affine[], int w, int h, int size, int *outw, int *outh) |
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| 146 | { |
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| 147 | int oh, ow; |
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| 148 | oh = h; |
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| 149 | ow = w; |
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| 150 | if(w > h) { |
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| 151 | h = h*((double)size/w); |
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| 152 | w = size; |
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| 153 | } else { |
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| 154 | w = w*((double)size/h); |
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| 155 | h = size; |
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| 156 | } |
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| 157 | w = w > 0 ? w : 1; |
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| 158 | h = h > 0 ? h : 1; |
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| 159 | |
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| 160 | affine[1] = affine[2] = affine[4] = affine[5] = 0; |
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| 161 | |
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| 162 | affine[0] = w / (double)ow; |
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| 163 | affine[3] = h / (double)oh; |
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| 164 | |
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| 165 | if(outw) |
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| 166 | *outw = w; |
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| 167 | if(outh) |
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| 168 | *outh = h; |
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| 169 | } |
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| 170 | #endif |
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| 171 | |
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| 172 | GdkPixbuf * |
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| 173 | scale_pixbuf_to_square (GdkPixbuf *pb, int size, int *outw, int *outh, GdkInterpType interp) |
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| 174 | { |
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| 175 | GdkPixbuf *new_pb; |
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| 176 | int width, height; |
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| 177 | int new_width, new_height; |
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| 178 | |
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| 179 | new_width = width = gdk_pixbuf_get_width (pb); |
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| 180 | new_height = height = gdk_pixbuf_get_height (pb); |
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| 181 | |
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| 182 | if(new_width > new_height) { |
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| 183 | new_height = new_height * (size / (double)new_width); |
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| 184 | new_width = size; |
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| 185 | } else { |
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| 186 | new_width = new_width * (size / (double)new_height); |
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| 187 | new_height = size; |
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| 188 | } |
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| 189 | |
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| 190 | new_width = new_width > 0 ? new_width : 1; |
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| 191 | new_height = new_height > 0 ? new_height : 1; |
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| 192 | |
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| 193 | if(outw) |
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| 194 | *outw = new_width; |
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| 195 | if(outh) |
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| 196 | *outh = new_height; |
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| 197 | |
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| 198 | if (new_width == width && new_height == height) |
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| 199 | return gdk_pixbuf_ref (pb); |
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| 200 | |
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| 201 | new_pb = gdk_pixbuf_new(gdk_pixbuf_get_colorspace(pb), |
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| 202 | gdk_pixbuf_get_has_alpha(pb), |
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| 203 | gdk_pixbuf_get_bits_per_sample(pb), |
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| 204 | new_width, |
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| 205 | new_height); |
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| 206 | |
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| 207 | gdk_pixbuf_scale (pb, new_pb, 0, 0, new_width, new_height, 0.0, 0.0, |
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| 208 | new_width / (double)width, |
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| 209 | new_height / (double)height, |
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| 210 | interp); |
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| 211 | |
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| 212 | return new_pb; |
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| 213 | } |
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| 214 | |
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| 215 | void |
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| 216 | transform_pixbuf(guchar *dst, int x0, int y0, int x1, int y1, int drs, |
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| 217 | GdkPixbuf *pixbuf, double affine[6], |
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| 218 | int level, ArtAlphaGamma *ag) |
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| 219 | { |
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| 220 | gint w, h, rs; |
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| 221 | |
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| 222 | rs = gdk_pixbuf_get_rowstride(pixbuf); |
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| 223 | h = gdk_pixbuf_get_height(pixbuf); |
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| 224 | w = gdk_pixbuf_get_width(pixbuf); |
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| 225 | |
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| 226 | if (gdk_pixbuf_get_has_alpha(pixbuf)) { |
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| 227 | art_rgb_rgba_affine(dst, x0, y0, x1, y1, drs, |
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| 228 | gdk_pixbuf_get_pixels(pixbuf), |
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| 229 | w, h, rs, affine, level, ag); |
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| 230 | } else { |
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| 231 | art_rgb_affine(dst, x0, y0, x1, y1, drs, |
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| 232 | gdk_pixbuf_get_pixels(pixbuf), |
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| 233 | w, h, rs, affine, level, ag); |
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| 234 | } |
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| 235 | } |
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| 236 | |
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| 237 | |
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| 238 | |
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| 239 | #if 0 |
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| 240 | void |
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| 241 | rgb_rotate270(guchar *dest, int drs, guchar *src, int w, int h, int srs) |
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| 242 | { |
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| 243 | guchar *p; |
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| 244 | guchar *sp; |
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| 245 | |
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| 246 | int i,j; |
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| 247 | |
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| 248 | for(j=0;j<h;j++) { |
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| 249 | sp = src + j*srs; |
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| 250 | p = dest + j*3; |
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| 251 | for(i=0;i<w;i++) { |
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| 252 | *(p++) = *(sp++); |
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| 253 | *(p++) = *(sp++); |
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| 254 | *p = *(sp++); |
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| 255 | p += drs-2; |
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| 256 | } |
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| 257 | } |
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| 258 | } |
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| 259 | |
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| 260 | void |
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| 261 | rgba_rotate270(guchar *dest, int drs, guchar *src, int w, int h, int srs) |
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| 262 | { |
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| 263 | guchar *p; |
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| 264 | guchar *sp; |
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| 265 | |
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| 266 | int i,j; |
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| 267 | |
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| 268 | for(j=0;j<h;j++) { |
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| 269 | sp = src + j*srs; |
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| 270 | p = dest + j*4; |
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| 271 | for(i=0;i<w;i++) { |
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| 272 | *(p++) = *(sp++); |
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| 273 | *(p++) = *(sp++); |
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| 274 | *(p++) = *(sp++); |
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| 275 | *p = *(sp++); |
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| 276 | p += drs-3; |
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| 277 | } |
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| 278 | } |
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| 279 | } |
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| 280 | #endif |
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