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-rw-r--r--Build/source/libs/gd/libgd-2.1.0/src/gd_filter.c606
1 files changed, 606 insertions, 0 deletions
diff --git a/Build/source/libs/gd/libgd-2.1.0/src/gd_filter.c b/Build/source/libs/gd/libgd-2.1.0/src/gd_filter.c
new file mode 100644
index 00000000000..6735aabfe5b
--- /dev/null
+++ b/Build/source/libs/gd/libgd-2.1.0/src/gd_filter.c
@@ -0,0 +1,606 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gd.h"
+
+#ifdef _WIN32
+# include <windows.h>
+#else
+# include <unistd.h>
+#endif
+#include <stdlib.h>
+#include <time.h>
+
+typedef int (BGD_STDCALL *FuncPtr)(gdImagePtr, int, int);
+
+#define GET_PIXEL_FUNCTION(src)(src->trueColor?gdImageGetTrueColorPixel:gdImageGetPixel)
+#define MIN(a,b) ((a)<(b)?(a):(b))
+#define MAX(a,b) ((a)<(b)?(b):(a))
+
+#ifdef _WIN32
+# define GD_SCATTER_SEED() (unsigned int)(time(0) * GetCurrentProcessId())
+#else
+# define GD_SCATTER_SEED() (unsigned int)(time(0) * getpid())
+#endif
+
+BGD_DECLARE(int) gdImageScatter(gdImagePtr im, int sub, int plus)
+{
+ gdScatter s;
+
+ s.sub = sub;
+ s.plus = plus;
+ s.num_colors = 0;
+ s.seed = GD_SCATTER_SEED();
+ return gdImageScatterEx(im, &s);
+}
+
+BGD_DECLARE(int) gdImageScatterColor(gdImagePtr im, int sub, int plus, int colors[], unsigned int num_colors)
+{
+ gdScatter s;
+
+ s.sub = sub;
+ s.plus = plus;
+ s.colors = colors;
+ s.num_colors = num_colors;
+ s.seed = GD_SCATTER_SEED();
+ return gdImageScatterEx(im, &s);
+}
+
+BGD_DECLARE(int) gdImageScatterEx(gdImagePtr im, gdScatterPtr scatter)
+{
+ register int x, y;
+ int dest_x, dest_y;
+ int pxl, new_pxl;
+ unsigned int n;
+ int sub = scatter->sub, plus = scatter->plus;
+
+ if (plus == 0 && sub == 0) {
+ return 1;
+ } else if (sub >= plus) {
+ return 0;
+ }
+
+ (void)srand(scatter->seed);
+
+ if (scatter->num_colors) {
+ for (y = 0; y < im->sy; y++) {
+ for (x = 0; x < im->sx; x++) {
+ dest_x = (int) (x + ((rand() % (plus - sub)) + sub));
+ dest_y = (int) (y + ((rand() % (plus - sub)) + sub));
+
+ if (!gdImageBoundsSafe(im, dest_x, dest_y)) {
+ continue;
+ }
+
+ pxl = gdImageGetPixel(im, x, y);
+ new_pxl = gdImageGetPixel(im, dest_x, dest_y);
+
+ for (n = 0; n < scatter->num_colors; n++) {
+ if (pxl == scatter->colors[n]) {
+ gdImageSetPixel(im, dest_x, dest_y, pxl);
+ gdImageSetPixel(im, x, y, new_pxl);
+ }
+ }
+ }
+ }
+ } else {
+ for (y = 0; y < im->sy; y++) {
+ for (x = 0; x < im->sx; x++) {
+ dest_x = (int) (x + ((rand() % (plus - sub)) + sub));
+ dest_y = (int) (y + ((rand() % (plus - sub)) + sub));
+
+ if (!gdImageBoundsSafe(im, dest_x, dest_y)) {
+ continue;
+ }
+
+ pxl = gdImageGetPixel(im, x, y);
+ new_pxl = gdImageGetPixel(im, dest_x, dest_y);
+
+ gdImageSetPixel(im, dest_x, dest_y, pxl);
+ gdImageSetPixel(im, x, y, new_pxl);
+ }
+ }
+ }
+
+ return 1;
+}
+
+BGD_DECLARE(int) gdImagePixelate(gdImagePtr im, int block_size, const unsigned int mode)
+{
+ int x, y;
+
+ if (block_size <= 0) {
+ return 0;
+ } else if (block_size == 1) {
+ return 1;
+ }
+ switch (mode) {
+ case GD_PIXELATE_UPPERLEFT:
+ for (y = 0; y < im->sy; y += block_size) {
+ for (x = 0; x < im->sx; x += block_size) {
+ if (gdImageBoundsSafe(im, x, y)) {
+ int c = gdImageGetPixel(im, x, y);
+ gdImageFilledRectangle(im, x, y, x + block_size - 1, y + block_size - 1, c);
+ }
+ }
+ }
+ break;
+ case GD_PIXELATE_AVERAGE:
+ for (y = 0; y < im->sy; y += block_size) {
+ for (x = 0; x < im->sx; x += block_size) {
+ int a, r, g, b, c;
+ int total;
+ int cx, cy;
+
+ a = r = g = b = c = total = 0;
+ /* sampling */
+ for (cy = 0; cy < block_size; cy++) {
+ for (cx = 0; cx < block_size; cx++) {
+ if (!gdImageBoundsSafe(im, x + cx, y + cy)) {
+ continue;
+ }
+ c = gdImageGetPixel(im, x + cx, y + cy);
+ a += gdImageAlpha(im, c);
+ r += gdImageRed(im, c);
+ g += gdImageGreen(im, c);
+ b += gdImageBlue(im, c);
+ total++;
+ }
+ }
+ /* drawing */
+ if (total > 0) {
+ c = gdImageColorResolveAlpha(im, r / total, g / total, b / total, a / total);
+ gdImageFilledRectangle(im, x, y, x + block_size - 1, y + block_size - 1, c);
+ }
+ }
+ }
+ break;
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+/* invert src image */
+BGD_DECLARE(int) gdImageNegate(gdImagePtr src)
+{
+ int x, y;
+ int r,g,b,a;
+ int new_pxl, pxl;
+ FuncPtr f;
+
+ if (src==NULL) {
+ return 0;
+ }
+
+ f = GET_PIXEL_FUNCTION(src);
+
+ for (y=0; y<src->sy; ++y) {
+ for (x=0; x<src->sx; ++x) {
+ pxl = f (src, x, y);
+ r = gdImageRed(src, pxl);
+ g = gdImageGreen(src, pxl);
+ b = gdImageBlue(src, pxl);
+ a = gdImageAlpha(src, pxl);
+
+ new_pxl = gdImageColorAllocateAlpha(src, 255-r, 255-g, 255-b, a);
+ if (new_pxl == -1) {
+ new_pxl = gdImageColorClosestAlpha(src, 255-r, 255-g, 255-b, a);
+ }
+ gdImageSetPixel (src, x, y, new_pxl);
+ }
+ }
+ return 1;
+}
+
+/* Convert the image src to a grayscale image */
+BGD_DECLARE(int) gdImageGrayScale(gdImagePtr src)
+{
+ int x, y;
+ int r,g,b,a;
+ int new_pxl, pxl;
+ FuncPtr f;
+
+ if (src==NULL) {
+ return 0;
+ }
+
+ f = GET_PIXEL_FUNCTION(src);
+
+ for (y=0; y<src->sy; ++y) {
+ for (x=0; x<src->sx; ++x) {
+ pxl = f (src, x, y);
+ r = gdImageRed(src, pxl);
+ g = gdImageGreen(src, pxl);
+ b = gdImageBlue(src, pxl);
+ a = gdImageAlpha(src, pxl);
+ r = g = b = (int) (.299 * r + .587 * g + .114 * b);
+
+ new_pxl = gdImageColorAllocateAlpha(src, r, g, b, a);
+ if (new_pxl == -1) {
+ new_pxl = gdImageColorClosestAlpha(src, r, g, b, a);
+ }
+ gdImageSetPixel (src, x, y, new_pxl);
+ }
+ }
+ return 1;
+}
+
+/* Set the brightness level <level> for the image src */
+BGD_DECLARE(int) gdImageBrightness(gdImagePtr src, int brightness)
+{
+ int x, y;
+ int r,g,b,a;
+ int new_pxl, pxl;
+ FuncPtr f;
+
+ if (src==NULL || (brightness < -255 || brightness > 255)) {
+ return 0;
+ }
+
+ if (brightness==0) {
+ return 1;
+ }
+
+ f = GET_PIXEL_FUNCTION(src);
+
+ for (y=0; y<src->sy; ++y) {
+ for (x=0; x<src->sx; ++x) {
+ pxl = f (src, x, y);
+
+ r = gdImageRed(src, pxl);
+ g = gdImageGreen(src, pxl);
+ b = gdImageBlue(src, pxl);
+ a = gdImageAlpha(src, pxl);
+
+ r = r + brightness;
+ g = g + brightness;
+ b = b + brightness;
+
+ r = (r > 255)? 255 : ((r < 0)? 0:r);
+ g = (g > 255)? 255 : ((g < 0)? 0:g);
+ b = (b > 255)? 255 : ((b < 0)? 0:b);
+
+ new_pxl = gdImageColorAllocateAlpha(src, (int)r, (int)g, (int)b, a);
+ if (new_pxl == -1) {
+ new_pxl = gdImageColorClosestAlpha(src, (int)r, (int)g, (int)b, a);
+ }
+ gdImageSetPixel (src, x, y, new_pxl);
+ }
+ }
+ return 1;
+}
+
+
+BGD_DECLARE(int) gdImageContrast(gdImagePtr src, double contrast)
+{
+ int x, y;
+ int r,g,b,a;
+ double rf,gf,bf;
+ int new_pxl, pxl;
+
+ FuncPtr f;
+
+ if (src==NULL) {
+ return 0;
+ }
+
+ f = GET_PIXEL_FUNCTION(src);
+
+ contrast = (double)(100.0-contrast)/100.0;
+ contrast = contrast*contrast;
+
+ for (y=0; y<src->sy; ++y) {
+ for (x=0; x<src->sx; ++x) {
+ pxl = f(src, x, y);
+
+ r = gdImageRed(src, pxl);
+ g = gdImageGreen(src, pxl);
+ b = gdImageBlue(src, pxl);
+ a = gdImageAlpha(src, pxl);
+
+ rf = (double)r/255.0;
+ rf = rf-0.5;
+ rf = rf*contrast;
+ rf = rf+0.5;
+ rf = rf*255.0;
+
+ bf = (double)b/255.0;
+ bf = bf-0.5;
+ bf = bf*contrast;
+ bf = bf+0.5;
+ bf = bf*255.0;
+
+ gf = (double)g/255.0;
+ gf = gf-0.5;
+ gf = gf*contrast;
+ gf = gf+0.5;
+ gf = gf*255.0;
+
+ rf = (rf > 255.0)? 255.0 : ((rf < 0.0)? 0.0:rf);
+ gf = (gf > 255.0)? 255.0 : ((gf < 0.0)? 0.0:gf);
+ bf = (bf > 255.0)? 255.0 : ((bf < 0.0)? 0.0:bf);
+
+ new_pxl = gdImageColorAllocateAlpha(src, (int)rf, (int)gf, (int)bf, a);
+ if (new_pxl == -1) {
+ new_pxl = gdImageColorClosestAlpha(src, (int)rf, (int)gf, (int)bf, a);
+ }
+ gdImageSetPixel (src, x, y, new_pxl);
+ }
+ }
+ return 1;
+}
+
+
+BGD_DECLARE(int) gdImageColor(gdImagePtr src, const int red, const int green, const int blue, const int alpha)
+{
+ int x, y;
+ int new_pxl, pxl;
+ FuncPtr f;
+
+ if (src == NULL) {
+ return 0;
+ }
+
+ f = GET_PIXEL_FUNCTION(src);
+
+ for (y=0; y<src->sy; ++y) {
+ for (x=0; x<src->sx; ++x) {
+ int r,g,b,a;
+
+ pxl = f(src, x, y);
+ r = gdImageRed(src, pxl);
+ g = gdImageGreen(src, pxl);
+ b = gdImageBlue(src, pxl);
+ a = gdImageAlpha(src, pxl);
+
+ r = r + red;
+ g = g + green;
+ b = b + blue;
+ a = a + alpha;
+
+ r = (r > 255)? 255 : ((r < 0)? 0 : r);
+ g = (g > 255)? 255 : ((g < 0)? 0 : g);
+ b = (b > 255)? 255 : ((b < 0)? 0 : b);
+ a = (a > 127)? 127 : ((a < 0)? 0 : a);
+
+ new_pxl = gdImageColorAllocateAlpha(src, r, g, b, a);
+ if (new_pxl == -1) {
+ new_pxl = gdImageColorClosestAlpha(src, r, g, b, a);
+ }
+ gdImageSetPixel (src, x, y, new_pxl);
+ }
+ }
+ return 1;
+}
+
+BGD_DECLARE(int) gdImageConvolution(gdImagePtr src, float filter[3][3], float filter_div, float offset)
+{
+ int x, y, i, j, new_a;
+ float new_r, new_g, new_b;
+ int new_pxl, pxl=0;
+ gdImagePtr srcback;
+ FuncPtr f;
+
+ if (src==NULL) {
+ return 0;
+ }
+
+ /* We need the orinal image with each safe neoghb. pixel */
+ srcback = gdImageCreateTrueColor (src->sx, src->sy);
+ if (srcback==NULL) {
+ return 0;
+ }
+
+ gdImageSaveAlpha(srcback, 1);
+ new_pxl = gdImageColorAllocateAlpha(srcback, 0, 0, 0, 127);
+ gdImageFill(srcback, 0, 0, new_pxl);
+
+ gdImageCopy(srcback, src,0,0,0,0,src->sx,src->sy);
+
+ f = GET_PIXEL_FUNCTION(src);
+
+ for ( y=0; y<src->sy; y++) {
+ for(x=0; x<src->sx; x++) {
+ new_r = new_g = new_b = 0;
+ new_a = gdImageAlpha(srcback, pxl);
+
+ for (j=0; j<3; j++) {
+ int yv = MIN(MAX(y - 1 + j, 0), src->sy - 1);
+ for (i=0; i<3; i++) {
+ pxl = f(srcback, MIN(MAX(x - 1 + i, 0), src->sx - 1), yv);
+ new_r += (float)gdImageRed(srcback, pxl) * filter[j][i];
+ new_g += (float)gdImageGreen(srcback, pxl) * filter[j][i];
+ new_b += (float)gdImageBlue(srcback, pxl) * filter[j][i];
+ }
+ }
+
+ new_r = (new_r/filter_div)+offset;
+ new_g = (new_g/filter_div)+offset;
+ new_b = (new_b/filter_div)+offset;
+
+ new_r = (new_r > 255.0f)? 255.0f : ((new_r < 0.0f)? 0.0f:new_r);
+ new_g = (new_g > 255.0f)? 255.0f : ((new_g < 0.0f)? 0.0f:new_g);
+ new_b = (new_b > 255.0f)? 255.0f : ((new_b < 0.0f)? 0.0f:new_b);
+
+ new_pxl = gdImageColorAllocateAlpha(src, (int)new_r, (int)new_g, (int)new_b, new_a);
+ if (new_pxl == -1) {
+ new_pxl = gdImageColorClosestAlpha(src, (int)new_r, (int)new_g, (int)new_b, new_a);
+ }
+ gdImageSetPixel (src, x, y, new_pxl);
+ }
+ }
+ gdImageDestroy(srcback);
+ return 1;
+}
+
+BGD_DECLARE(int) gdImageSelectiveBlur( gdImagePtr src)
+{
+ int x, y, i, j;
+ float new_r, new_g, new_b;
+ int new_pxl, cpxl, pxl, new_a=0;
+ float flt_r [3][3];
+ float flt_g [3][3];
+ float flt_b [3][3];
+ float flt_r_sum, flt_g_sum, flt_b_sum;
+
+ gdImagePtr srcback;
+ FuncPtr f;
+
+ if (src==NULL) {
+ return 0;
+ }
+
+ /* We need the orinal image with each safe neoghb. pixel */
+ srcback = gdImageCreateTrueColor (src->sx, src->sy);
+ if (srcback==NULL) {
+ return 0;
+ }
+ gdImageCopy(srcback, src,0,0,0,0,src->sx,src->sy);
+
+ f = GET_PIXEL_FUNCTION(src);
+
+ for(y = 0; y<src->sy; y++) {
+ for (x=0; x<src->sx; x++) {
+ flt_r_sum = flt_g_sum = flt_b_sum = 0.0;
+ cpxl = f(src, x, y);
+
+ for (j=0; j<3; j++) {
+ for (i=0; i<3; i++) {
+ if ((j == 1) && (i == 1)) {
+ flt_r[1][1] = flt_g[1][1] = flt_b[1][1] = 0.5;
+ } else {
+ pxl = f(src, x-(3>>1)+i, y-(3>>1)+j);
+ new_a = gdImageAlpha(srcback, pxl);
+
+ new_r = ((float)gdImageRed(srcback, cpxl)) - ((float)gdImageRed (srcback, pxl));
+
+ if (new_r < 0.0f) {
+ new_r = -new_r;
+ }
+ if (new_r != 0) {
+ flt_r[j][i] = 1.0f/new_r;
+ } else {
+ flt_r[j][i] = 1.0f;
+ }
+
+ new_g = ((float)gdImageGreen(srcback, cpxl)) - ((float)gdImageGreen(srcback, pxl));
+
+ if (new_g < 0.0f) {
+ new_g = -new_g;
+ }
+ if (new_g != 0) {
+ flt_g[j][i] = 1.0f/new_g;
+ } else {
+ flt_g[j][i] = 1.0f;
+ }
+
+ new_b = ((float)gdImageBlue(srcback, cpxl)) - ((float)gdImageBlue(srcback, pxl));
+
+ if (new_b < 0.0f) {
+ new_b = -new_b;
+ }
+ if (new_b != 0) {
+ flt_b[j][i] = 1.0f/new_b;
+ } else {
+ flt_b[j][i] = 1.0f;
+ }
+ }
+
+ flt_r_sum += flt_r[j][i];
+ flt_g_sum += flt_g[j][i];
+ flt_b_sum += flt_b [j][i];
+ }
+ }
+
+ for (j=0; j<3; j++) {
+ for (i=0; i<3; i++) {
+ if (flt_r_sum != 0.0) {
+ flt_r[j][i] /= flt_r_sum;
+ }
+ if (flt_g_sum != 0.0) {
+ flt_g[j][i] /= flt_g_sum;
+ }
+ if (flt_b_sum != 0.0) {
+ flt_b [j][i] /= flt_b_sum;
+ }
+ }
+ }
+
+ new_r = new_g = new_b = 0.0;
+
+ for (j=0; j<3; j++) {
+ for (i=0; i<3; i++) {
+ pxl = f(src, x-(3>>1)+i, y-(3>>1)+j);
+ new_r += (float)gdImageRed(srcback, pxl) * flt_r[j][i];
+ new_g += (float)gdImageGreen(srcback, pxl) * flt_g[j][i];
+ new_b += (float)gdImageBlue(srcback, pxl) * flt_b[j][i];
+ }
+ }
+
+ new_r = (new_r > 255.0f)? 255.0f : ((new_r < 0.0f)? 0.0f:new_r);
+ new_g = (new_g > 255.0f)? 255.0f : ((new_g < 0.0f)? 0.0f:new_g);
+ new_b = (new_b > 255.0f)? 255.0f : ((new_b < 0.0f)? 0.0f:new_b);
+ new_pxl = gdImageColorAllocateAlpha(src, (int)new_r, (int)new_g, (int)new_b, new_a);
+ if (new_pxl == -1) {
+ new_pxl = gdImageColorClosestAlpha(src, (int)new_r, (int)new_g, (int)new_b, new_a);
+ }
+ gdImageSetPixel (src, x, y, new_pxl);
+ }
+ }
+ gdImageDestroy(srcback);
+ return 1;
+}
+
+BGD_DECLARE(int) gdImageEdgeDetectQuick(gdImagePtr src)
+{
+ float filter[3][3] = {{-1.0,0.0,-1.0},
+ {0.0,4.0,0.0},
+ {-1.0,0.0,-1.0}};
+
+ return gdImageConvolution(src, filter, 1, 127);
+}
+
+BGD_DECLARE(int) gdImageGaussianBlur(gdImagePtr im)
+{
+ float filter[3][3] = {{1.0,2.0,1.0},
+ {2.0,4.0,2.0},
+ {1.0,2.0,1.0}};
+
+ return gdImageConvolution(im, filter, 16, 0);
+}
+
+BGD_DECLARE(int) gdImageEmboss(gdImagePtr im)
+{
+/*
+ float filter[3][3] = {{1.0,1.0,1.0},
+ {0.0,0.0,0.0},
+ {-1.0,-1.0,-1.0}};
+*/
+ float filter[3][3] = {{ 1.5, 0.0, 0.0},
+ { 0.0, 0.0, 0.0},
+ { 0.0, 0.0,-1.5}};
+
+ return gdImageConvolution(im, filter, 1, 127);
+}
+
+BGD_DECLARE(int) gdImageMeanRemoval(gdImagePtr im)
+{
+ float filter[3][3] = {{-1.0,-1.0,-1.0},
+ {-1.0,9.0,-1.0},
+ {-1.0,-1.0,-1.0}};
+
+ return gdImageConvolution(im, filter, 1, 0);
+}
+
+BGD_DECLARE(int) gdImageSmooth(gdImagePtr im, float weight)
+{
+ float filter[3][3] = {{1.0,1.0,1.0},
+ {1.0,0.0,1.0},
+ {1.0,1.0,1.0}};
+
+ filter[1][1] = weight;
+
+ return gdImageConvolution(im, filter, weight+8, 0);
+}