diff options
Diffstat (limited to 'packages/gtk+/gtk+-2.10.14/integer-pixops.patch')
| -rw-r--r-- | packages/gtk+/gtk+-2.10.14/integer-pixops.patch | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/packages/gtk+/gtk+-2.10.14/integer-pixops.patch b/packages/gtk+/gtk+-2.10.14/integer-pixops.patch new file mode 100644 index 0000000000..490a60dd8a --- /dev/null +++ b/packages/gtk+/gtk+-2.10.14/integer-pixops.patch @@ -0,0 +1,348 @@ +--- /tmp/config.h.in 2006-12-23 00:00:38.000000000 +0100 ++++ gtk+-2.10.6/config.h.in 2006-12-23 00:01:05.632227000 +0100 +@@ -253,3 +253,7 @@ + + /* Define to `int' if <sys/types.h> doesn't define. */ + #undef uid_t ++ ++/* Define to use integer math rather than floating point where possible. */ ++#undef ENABLE_INTEGER_PIXOPS ++ +--- /tmp/configure.in 2006-12-23 00:02:16.000000000 +0100 ++++ gtk+-2.10.6/configure.in 2006-12-23 00:05:11.172227000 +0100 +@@ -203,6 +203,15 @@ + [AC_HELP_STRING([--disable-rebuilds], + [disable all source autogeneration rules])],, + [enable_rebuilds=yes]) ++AC_ARG_ENABLE(integer-pixops, ++ [AC_HELP_STRING([--enable-integer-pixops], ++ [use integer math where possible])],, ++ [enable_integer_pixops=no]) ++ ++if test "x$enable_integer_pixops" = "xyes"; then ++ AC_DEFINE(ENABLE_INTEGER_PIXOPS) ++fi ++ + AC_ARG_ENABLE(visibility, + [AC_HELP_STRING([--disable-visibility], + [don't use ELF visibility attributes])],, +--- /tmp/pixops.c 2006-12-23 10:04:02.000000000 +0100 ++++ gtk+-2.10.6/gdk-pixbuf/pixops/pixops.c 2006-12-23 10:04:21.772227000 +0100 +@@ -28,6 +28,10 @@ + #define SUBSAMPLE_MASK ((1 << SUBSAMPLE_BITS)-1) + #define SCALE_SHIFT 16 + ++#ifdef ENABLE_INTEGER_PIXOPS ++#define FRAC 0x10000ULL ++#endif ++ + typedef struct _PixopsFilter PixopsFilter; + typedef struct _PixopsFilterDimension PixopsFilterDimension; + +@@ -972,6 +976,29 @@ + (*pixel_func) (dest, dest_x, dest_channels, dest_has_alpha, src_has_alpha, check_size, color1, color2, r, g, b, a); + } + ++#ifdef ENABLE_INTEGER_PIXOPS ++ ++static void ++correct_total (int *weights, ++ int n_x, ++ int n_y, ++ int total, ++ unsigned long overall_alpha) ++{ ++ int correction = (int)(overall_alpha - total); ++ int i; ++ for (i = n_x * n_y - 1; i >= 0; i--) ++ { ++ if (*(weights + i) + correction >= 0) ++ { ++ *(weights + i) += correction; ++ break; ++ } ++ } ++} ++ ++#else ++ + static void + correct_total (int *weights, + int n_x, +@@ -998,6 +1025,8 @@ + } + } + ++#endif ++ + static int * + make_filter_table (PixopsFilter *filter) + { +@@ -1026,7 +1055,11 @@ + *(pixel_weights + n_x * i + j) = weight; + } + +- correct_total (pixel_weights, n_x, n_y, total, filter->overall_alpha); ++#ifdef ENABLE_INTEGER_PIXOPS ++ correct_total (pixel_weights, n_x, n_y, total, overall_alpha * FRAC); ++#else ++ correct_total (pixel_weights, n_x, n_y, total, overall_alpha); ++#endif + } + + return weights; +@@ -1178,6 +1211,93 @@ + /* Compute weights for reconstruction by replication followed by + * sampling with a box filter + */ ++#ifdef ENABLE_INTEGER_PIXOPS ++ ++static void ++tile_make_weights (PixopsFilter *filter, double x_scale_d, double y_scale_d, double overall_alpha_d) ++{ ++ int i_offset, j_offset; ++ unsigned long x_scale = x_scale_d * FRAC; ++ unsigned long y_scale = y_scale_d * FRAC; ++ unsigned long overall_alpha = overall_alpha_d * FRAC; ++ unsigned long x_scale_r = FRAC / x_scale; ++ unsigned long y_scale_r = FRAC / y_scale; ++ ++ int n_x = ceil(1/x_scale_d + 1); ++ int n_y = ceil(1/y_scale_d + 1); ++ ++ filter->x_offset = 0; ++ filter->y_offset = 0; ++ filter->n_x = n_x; ++ filter->n_y = n_y; ++ filter->weights = g_new (int, SUBSAMPLE * SUBSAMPLE * n_x * n_y); ++ ++ for (i_offset=0; i_offset<SUBSAMPLE; i_offset++) ++ for (j_offset=0; j_offset<SUBSAMPLE; j_offset++) ++ { ++ int *pixel_weights = filter->weights + ((i_offset*SUBSAMPLE) + j_offset) * n_x * n_y; ++ unsigned long x = j_offset * FRAC / SUBSAMPLE; ++ unsigned long y = i_offset * FRAC / SUBSAMPLE; ++ int i,j; ++ int total = 0; ++ ++ for (i = 0; i < n_y; i++) ++ { ++ unsigned long tw, th; ++ ++ if (i < y) ++ { ++ ++ if (i + FRAC > y) ++ th = MIN(i+FRAC, y + y_scale_r) - y; ++ else ++ th = 0; ++ } ++ else ++ { ++ if (y + FRAC/y_scale > i) ++ th = MIN(i+FRAC, y + y_scale_r) - i; ++ else ++ th = 0; ++ } ++ ++ for (j = 0; j < n_x; j++) ++ { ++ int weight; ++ ++ if (j < x) ++ { ++ if (j + FRAC > x) ++ tw = MIN(j+FRAC, x + x_scale_r) - x; ++ else ++ tw = 0; ++ } ++ else ++ { ++ if (x + FRAC/x_scale > j) ++ tw = MIN(j+FRAC, x + x_scale_r) - j; ++ else ++ tw = 0; ++ } ++ ++ { ++ unsigned long lweight = (tw * x_scale) / FRAC; ++ lweight = (lweight * th) / FRAC; ++ lweight = (lweight * y_scale) / FRAC; ++ lweight = (lweight * overall_alpha) / FRAC; ++ weight = lweight; ++ } ++ total += weight; ++ *(pixel_weights + n_x * i + j) = weight; ++ } ++ } ++ ++ correct_total (pixel_weights, n_x, n_y, total, overall_alpha); ++ } ++} ++ ++#else ++ + static void + tile_make_weights (PixopsFilterDimension *dim, + double scale) +@@ -1216,10 +1336,151 @@ + } + } + ++#endif ++ + /* Compute weights for a filter that, for minification + * is the same as 'tiles', and for magnification, is bilinear + * reconstruction followed by a sampling with a delta function. + */ ++#ifdef ENABLE_INTEGER_PIXOPS ++ ++static void ++bilinear_magnify_make_weights (PixopsFilter *filter, double x_scale_d, double y_scale_d, double overall_alpha_d) ++{ ++ int i_offset, j_offset; ++ unsigned long *x_weights, *y_weights; ++ int n_x, n_y; ++ unsigned long x_scale = x_scale_d * FRAC; ++ unsigned long y_scale = y_scale_d * FRAC; ++ unsigned long overall_alpha = overall_alpha_d * FRAC; ++ unsigned long x_scale_r = (FRAC / x_scale_d); ++ unsigned long y_scale_r = (FRAC / y_scale_d); ++ ++ if (x_scale > FRAC) /* Bilinear */ ++ { ++ n_x = 2; ++ filter->x_offset = 0.5 * (1/x_scale_d - 1); ++ } ++ else /* Tile */ ++ { ++ n_x = ceil(1.0 + 1.0/x_scale_d); ++ filter->x_offset = 0.0; ++ } ++ ++ if (y_scale > FRAC) /* Bilinear */ ++ { ++ n_y = 2; ++ filter->y_offset = 0.5 * (1/y_scale_d - 1); ++ } ++ else /* Tile */ ++ { ++ n_y = ceil(1.0 + 1.0/y_scale_d); ++ filter->y_offset = 0.0; ++ } ++ ++ filter->n_y = n_y; ++ filter->n_x = n_x; ++ filter->weights = g_new (int, SUBSAMPLE * SUBSAMPLE * n_x * n_y); ++ ++ x_weights = g_new (unsigned long, n_x); ++ y_weights = g_new (unsigned long, n_y); ++ ++ for (i_offset=0; i_offset<SUBSAMPLE; i_offset++) ++ for (j_offset=0; j_offset<SUBSAMPLE; j_offset++) ++ { ++ int *pixel_weights = filter->weights + ((i_offset*SUBSAMPLE) + j_offset) * n_x * n_y; ++ unsigned long x = j_offset * FRAC / SUBSAMPLE; ++ unsigned long y = i_offset * FRAC / SUBSAMPLE; ++ int i,j; ++ int total = 0; ++ ++ if (x_scale > FRAC) /* Bilinear */ ++ { ++ for (i = 0; i < n_x; i++) ++ { ++ /* x_weights[i] = ((i == 0) ? (1 - x) : x) / x_scale; */ ++ unsigned long w = (((i == 0) ? (FRAC - x) : x) * x_scale_r); ++ x_weights[i] = w / FRAC; ++ } ++ } ++ else /* Tile */ ++ { ++ /* x ++ * ---------|--.-|----|--.-|------- SRC ++ * ------------|---------|--------- DEST ++ */ ++ for (i = 0; i < n_x; i++) ++ { ++ if (i < x) ++ { ++ if (i + 1 > x) ++ x_weights[i] = MIN(FRAC*(i+1), FRAC * x + (((unsigned long long)(FRAC * FRAC)) / (unsigned long)x_scale)) - (x * FRAC); ++ else ++ x_weights[i] = 0; ++ } ++ else ++ { ++ if (x + 1/x_scale > i) ++ x_weights[i] = MIN(FRAC*(i+1), FRAC * x + (((unsigned long long)(FRAC * FRAC)) / (unsigned long)x_scale)) - (i * FRAC); ++ else ++ x_weights[i] = 0; ++ } ++ } ++ } ++ ++ if (y_scale > FRAC) /* Bilinear */ ++ { ++ for (i = 0; i < n_y; i++) ++ { ++ unsigned long w = ((unsigned long)((i == 0) ? (FRAC - y) : y) * y_scale_r); ++ y_weights[i] = w / FRAC; ++ } ++ } ++ else /* Tile */ ++ { ++ /* y ++ * ---------|--.-|----|--.-|------- SRC ++ * ------------|---------|--------- DEST ++ */ ++ for (i = 0; i < n_y; i++) ++ { ++ if (i < y) ++ { ++ if (i + 1 > y) ++ y_weights[i] = MIN(FRAC*(i+1), FRAC * y + (FRAC * FRAC / (unsigned long)y_scale)) - (y * FRAC); ++ else ++ y_weights[i] = 0; ++ } ++ else ++ { ++ if (y + 1/y_scale > i) ++ y_weights[i] = MIN(FRAC*(i+1), FRAC * y + (FRAC * FRAC / (unsigned long)y_scale)) - (i * FRAC); ++ else ++ y_weights[i] = 0; ++ } ++ } ++ } ++ ++ for (i = 0; i < n_y; i++) ++ for (j = 0; j < n_x; j++) ++ { ++ unsigned long long weight = (x_weights[j] * x_scale) / FRAC; ++ weight = (weight * y_weights[i]) / FRAC; ++ weight = (weight * y_scale) / FRAC; ++ weight = (weight * overall_alpha) / FRAC; ++ *(pixel_weights + n_x * i + j) = (unsigned long)weight; ++ total += (unsigned long)weight; ++ } ++ ++ correct_total (pixel_weights, n_x, n_y, total, overall_alpha); ++ } ++ ++ g_free (x_weights); ++ g_free (y_weights); ++} ++ ++#else ++ + static void + bilinear_magnify_make_weights (PixopsFilterDimension *dim, + double scale) +@@ -1283,6 +1544,8 @@ + } + } + ++#endif ++ + /* Computes the integral from b0 to b1 of + * + * f(x) = x; 0 <= x < 1 |