private void stack_blur_bgra32(ImageBuffer img, int rx, int ry) { throw new NotImplementedException(); #if false //typedef typename Img::color_type color_type; //typedef typename Img::order_type order_type; int x, y, xp, yp, i; int stack_ptr; int stack_start; byte * src_pix_ptr; byte * dst_pix_ptr; color_type *stack_pix_ptr; int sum_r; int sum_g; int sum_b; int sum_a; int sum_in_r; int sum_in_g; int sum_in_b; int sum_in_a; int sum_out_r; int sum_out_g; int sum_out_b; int sum_out_a; int w = img.width(); int h = img.height(); int wm = w - 1; int hm = h - 1; int div; int mul_sum; int shr_sum; pod_vector <color_type> stack; if (rx > 0) { if (rx > 254) { rx = 254; } div = rx * 2 + 1; mul_sum = stack_blur_tables.g_stack_blur8_mul[rx]; shr_sum = stack_blur_tables.g_stack_blur8_shr[rx]; stack.allocate(div); for (y = 0; y < h; y++) { sum_r = sum_g = sum_b = sum_a = sum_in_r = sum_in_g = sum_in_b = sum_in_a = sum_out_r = sum_out_g = sum_out_b = sum_out_a = 0; src_pix_ptr = img.pix_ptr(0, y); for (i = 0; i <= rx; i++) { stack_pix_ptr = &stack[i]; stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_r += src_pix_ptr[R] * (i + 1); sum_g += src_pix_ptr[G] * (i + 1); sum_b += src_pix_ptr[B] * (i + 1); sum_a += src_pix_ptr[A] * (i + 1); sum_out_r += src_pix_ptr[R]; sum_out_g += src_pix_ptr[G]; sum_out_b += src_pix_ptr[B]; sum_out_a += src_pix_ptr[A]; } for (i = 1; i <= rx; i++) { if (i <= wm) { src_pix_ptr += Img::pix_width; } stack_pix_ptr = &stack[i + rx]; stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_r += src_pix_ptr[R] * (rx + 1 - i); sum_g += src_pix_ptr[G] * (rx + 1 - i); sum_b += src_pix_ptr[B] * (rx + 1 - i); sum_a += src_pix_ptr[A] * (rx + 1 - i); sum_in_r += src_pix_ptr[R]; sum_in_g += src_pix_ptr[G]; sum_in_b += src_pix_ptr[B]; sum_in_a += src_pix_ptr[A]; } stack_ptr = rx; xp = rx; if (xp > wm) { xp = wm; } src_pix_ptr = img.pix_ptr(xp, y); dst_pix_ptr = img.pix_ptr(0, y); for (x = 0; x < w; x++) { dst_pix_ptr[R] = (sum_r * mul_sum) >> shr_sum; dst_pix_ptr[G] = (sum_g * mul_sum) >> shr_sum; dst_pix_ptr[B] = (sum_b * mul_sum) >> shr_sum; dst_pix_ptr[A] = (sum_a * mul_sum) >> shr_sum; dst_pix_ptr += Img::pix_width; sum_r -= sum_out_r; sum_g -= sum_out_g; sum_b -= sum_out_b; sum_a -= sum_out_a; stack_start = stack_ptr + div - rx; if (stack_start >= div) { stack_start -= div; } stack_pix_ptr = &stack[stack_start]; sum_out_r -= stack_pix_ptr->r; sum_out_g -= stack_pix_ptr->g; sum_out_b -= stack_pix_ptr->b; sum_out_a -= stack_pix_ptr->a; if (xp < wm) { src_pix_ptr += Img::pix_width; ++xp; } stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_in_r += src_pix_ptr[R]; sum_in_g += src_pix_ptr[G]; sum_in_b += src_pix_ptr[B]; sum_in_a += src_pix_ptr[A]; sum_r += sum_in_r; sum_g += sum_in_g; sum_b += sum_in_b; sum_a += sum_in_a; ++stack_ptr; if (stack_ptr >= div) { stack_ptr = 0; } stack_pix_ptr = &stack[stack_ptr]; sum_out_r += stack_pix_ptr->r; sum_out_g += stack_pix_ptr->g; sum_out_b += stack_pix_ptr->b; sum_out_a += stack_pix_ptr->a; sum_in_r -= stack_pix_ptr->r; sum_in_g -= stack_pix_ptr->g; sum_in_b -= stack_pix_ptr->b; sum_in_a -= stack_pix_ptr->a; } } } if (ry > 0) { if (ry > 254) { ry = 254; } div = ry * 2 + 1; mul_sum = stack_blur_tables.g_stack_blur8_mul[ry]; shr_sum = stack_blur_tables.g_stack_blur8_shr[ry]; stack.allocate(div); int stride = img.stride(); for (x = 0; x < w; x++) { sum_r = sum_g = sum_b = sum_a = sum_in_r = sum_in_g = sum_in_b = sum_in_a = sum_out_r = sum_out_g = sum_out_b = sum_out_a = 0; src_pix_ptr = img.pix_ptr(x, 0); for (i = 0; i <= ry; i++) { stack_pix_ptr = &stack[i]; stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_r += src_pix_ptr[R] * (i + 1); sum_g += src_pix_ptr[G] * (i + 1); sum_b += src_pix_ptr[B] * (i + 1); sum_a += src_pix_ptr[A] * (i + 1); sum_out_r += src_pix_ptr[R]; sum_out_g += src_pix_ptr[G]; sum_out_b += src_pix_ptr[B]; sum_out_a += src_pix_ptr[A]; } for (i = 1; i <= ry; i++) { if (i <= hm) { src_pix_ptr += stride; } stack_pix_ptr = &stack[i + ry]; stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_r += src_pix_ptr[R] * (ry + 1 - i); sum_g += src_pix_ptr[G] * (ry + 1 - i); sum_b += src_pix_ptr[B] * (ry + 1 - i); sum_a += src_pix_ptr[A] * (ry + 1 - i); sum_in_r += src_pix_ptr[R]; sum_in_g += src_pix_ptr[G]; sum_in_b += src_pix_ptr[B]; sum_in_a += src_pix_ptr[A]; } stack_ptr = ry; yp = ry; if (yp > hm) { yp = hm; } src_pix_ptr = img.pix_ptr(x, yp); dst_pix_ptr = img.pix_ptr(x, 0); for (y = 0; y < h; y++) { dst_pix_ptr[R] = (sum_r * mul_sum) >> shr_sum; dst_pix_ptr[G] = (sum_g * mul_sum) >> shr_sum; dst_pix_ptr[B] = (sum_b * mul_sum) >> shr_sum; dst_pix_ptr[A] = (sum_a * mul_sum) >> shr_sum; dst_pix_ptr += stride; sum_r -= sum_out_r; sum_g -= sum_out_g; sum_b -= sum_out_b; sum_a -= sum_out_a; stack_start = stack_ptr + div - ry; if (stack_start >= div) { stack_start -= div; } stack_pix_ptr = &stack[stack_start]; sum_out_r -= stack_pix_ptr->r; sum_out_g -= stack_pix_ptr->g; sum_out_b -= stack_pix_ptr->b; sum_out_a -= stack_pix_ptr->a; if (yp < hm) { src_pix_ptr += stride; ++yp; } stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_in_r += src_pix_ptr[R]; sum_in_g += src_pix_ptr[G]; sum_in_b += src_pix_ptr[B]; sum_in_a += src_pix_ptr[A]; sum_r += sum_in_r; sum_g += sum_in_g; sum_b += sum_in_b; sum_a += sum_in_a; ++stack_ptr; if (stack_ptr >= div) { stack_ptr = 0; } stack_pix_ptr = &stack[stack_ptr]; sum_out_r += stack_pix_ptr->r; sum_out_g += stack_pix_ptr->g; sum_out_b += stack_pix_ptr->b; sum_out_a += stack_pix_ptr->a; sum_in_r -= stack_pix_ptr->r; sum_in_g -= stack_pix_ptr->g; sum_in_b -= stack_pix_ptr->b; sum_in_a -= stack_pix_ptr->a; } } } #endif }
private void stack_blur_bgra32(ImageBuffer img, int rx, int ry) { throw new NotImplementedException(); #if false //typedef typename Img::color_type color_type; //typedef typename Img::order_type order_type; int x, y, xp, yp, i; int stack_ptr; int stack_start; byte* src_pix_ptr; byte* dst_pix_ptr; color_type* stack_pix_ptr; int sum_r; int sum_g; int sum_b; int sum_a; int sum_in_r; int sum_in_g; int sum_in_b; int sum_in_a; int sum_out_r; int sum_out_g; int sum_out_b; int sum_out_a; int w = img.width(); int h = img.height(); int wm = w - 1; int hm = h - 1; int div; int mul_sum; int shr_sum; pod_vector<color_type> stack; if(rx > 0) { if(rx > 254) rx = 254; div = rx * 2 + 1; mul_sum = stack_blur_tables.g_stack_blur8_mul[rx]; shr_sum = stack_blur_tables.g_stack_blur8_shr[rx]; stack.allocate(div); for(y = 0; y < h; y++) { sum_r = sum_g = sum_b = sum_a = sum_in_r = sum_in_g = sum_in_b = sum_in_a = sum_out_r = sum_out_g = sum_out_b = sum_out_a = 0; src_pix_ptr = img.pix_ptr(0, y); for(i = 0; i <= rx; i++) { stack_pix_ptr = &stack[i]; stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_r += src_pix_ptr[R] * (i + 1); sum_g += src_pix_ptr[G] * (i + 1); sum_b += src_pix_ptr[B] * (i + 1); sum_a += src_pix_ptr[A] * (i + 1); sum_out_r += src_pix_ptr[R]; sum_out_g += src_pix_ptr[G]; sum_out_b += src_pix_ptr[B]; sum_out_a += src_pix_ptr[A]; } for(i = 1; i <= rx; i++) { if(i <= wm) src_pix_ptr += Img::pix_width; stack_pix_ptr = &stack[i + rx]; stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_r += src_pix_ptr[R] * (rx + 1 - i); sum_g += src_pix_ptr[G] * (rx + 1 - i); sum_b += src_pix_ptr[B] * (rx + 1 - i); sum_a += src_pix_ptr[A] * (rx + 1 - i); sum_in_r += src_pix_ptr[R]; sum_in_g += src_pix_ptr[G]; sum_in_b += src_pix_ptr[B]; sum_in_a += src_pix_ptr[A]; } stack_ptr = rx; xp = rx; if(xp > wm) xp = wm; src_pix_ptr = img.pix_ptr(xp, y); dst_pix_ptr = img.pix_ptr(0, y); for(x = 0; x < w; x++) { dst_pix_ptr[R] = (sum_r * mul_sum) >> shr_sum; dst_pix_ptr[G] = (sum_g * mul_sum) >> shr_sum; dst_pix_ptr[B] = (sum_b * mul_sum) >> shr_sum; dst_pix_ptr[A] = (sum_a * mul_sum) >> shr_sum; dst_pix_ptr += Img::pix_width; sum_r -= sum_out_r; sum_g -= sum_out_g; sum_b -= sum_out_b; sum_a -= sum_out_a; stack_start = stack_ptr + div - rx; if(stack_start >= div) stack_start -= div; stack_pix_ptr = &stack[stack_start]; sum_out_r -= stack_pix_ptr->r; sum_out_g -= stack_pix_ptr->g; sum_out_b -= stack_pix_ptr->b; sum_out_a -= stack_pix_ptr->a; if(xp < wm) { src_pix_ptr += Img::pix_width; ++xp; } stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_in_r += src_pix_ptr[R]; sum_in_g += src_pix_ptr[G]; sum_in_b += src_pix_ptr[B]; sum_in_a += src_pix_ptr[A]; sum_r += sum_in_r; sum_g += sum_in_g; sum_b += sum_in_b; sum_a += sum_in_a; ++stack_ptr; if(stack_ptr >= div) stack_ptr = 0; stack_pix_ptr = &stack[stack_ptr]; sum_out_r += stack_pix_ptr->r; sum_out_g += stack_pix_ptr->g; sum_out_b += stack_pix_ptr->b; sum_out_a += stack_pix_ptr->a; sum_in_r -= stack_pix_ptr->r; sum_in_g -= stack_pix_ptr->g; sum_in_b -= stack_pix_ptr->b; sum_in_a -= stack_pix_ptr->a; } } } if(ry > 0) { if(ry > 254) ry = 254; div = ry * 2 + 1; mul_sum = stack_blur_tables.g_stack_blur8_mul[ry]; shr_sum = stack_blur_tables.g_stack_blur8_shr[ry]; stack.allocate(div); int stride = img.stride(); for(x = 0; x < w; x++) { sum_r = sum_g = sum_b = sum_a = sum_in_r = sum_in_g = sum_in_b = sum_in_a = sum_out_r = sum_out_g = sum_out_b = sum_out_a = 0; src_pix_ptr = img.pix_ptr(x, 0); for(i = 0; i <= ry; i++) { stack_pix_ptr = &stack[i]; stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_r += src_pix_ptr[R] * (i + 1); sum_g += src_pix_ptr[G] * (i + 1); sum_b += src_pix_ptr[B] * (i + 1); sum_a += src_pix_ptr[A] * (i + 1); sum_out_r += src_pix_ptr[R]; sum_out_g += src_pix_ptr[G]; sum_out_b += src_pix_ptr[B]; sum_out_a += src_pix_ptr[A]; } for(i = 1; i <= ry; i++) { if(i <= hm) src_pix_ptr += stride; stack_pix_ptr = &stack[i + ry]; stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_r += src_pix_ptr[R] * (ry + 1 - i); sum_g += src_pix_ptr[G] * (ry + 1 - i); sum_b += src_pix_ptr[B] * (ry + 1 - i); sum_a += src_pix_ptr[A] * (ry + 1 - i); sum_in_r += src_pix_ptr[R]; sum_in_g += src_pix_ptr[G]; sum_in_b += src_pix_ptr[B]; sum_in_a += src_pix_ptr[A]; } stack_ptr = ry; yp = ry; if(yp > hm) yp = hm; src_pix_ptr = img.pix_ptr(x, yp); dst_pix_ptr = img.pix_ptr(x, 0); for(y = 0; y < h; y++) { dst_pix_ptr[R] = (sum_r * mul_sum) >> shr_sum; dst_pix_ptr[G] = (sum_g * mul_sum) >> shr_sum; dst_pix_ptr[B] = (sum_b * mul_sum) >> shr_sum; dst_pix_ptr[A] = (sum_a * mul_sum) >> shr_sum; dst_pix_ptr += stride; sum_r -= sum_out_r; sum_g -= sum_out_g; sum_b -= sum_out_b; sum_a -= sum_out_a; stack_start = stack_ptr + div - ry; if(stack_start >= div) stack_start -= div; stack_pix_ptr = &stack[stack_start]; sum_out_r -= stack_pix_ptr->r; sum_out_g -= stack_pix_ptr->g; sum_out_b -= stack_pix_ptr->b; sum_out_a -= stack_pix_ptr->a; if(yp < hm) { src_pix_ptr += stride; ++yp; } stack_pix_ptr->r = src_pix_ptr[R]; stack_pix_ptr->g = src_pix_ptr[G]; stack_pix_ptr->b = src_pix_ptr[B]; stack_pix_ptr->a = src_pix_ptr[A]; sum_in_r += src_pix_ptr[R]; sum_in_g += src_pix_ptr[G]; sum_in_b += src_pix_ptr[B]; sum_in_a += src_pix_ptr[A]; sum_r += sum_in_r; sum_g += sum_in_g; sum_b += sum_in_b; sum_a += sum_in_a; ++stack_ptr; if(stack_ptr >= div) stack_ptr = 0; stack_pix_ptr = &stack[stack_ptr]; sum_out_r += stack_pix_ptr->r; sum_out_g += stack_pix_ptr->g; sum_out_b += stack_pix_ptr->b; sum_out_a += stack_pix_ptr->a; sum_in_r -= stack_pix_ptr->r; sum_in_g -= stack_pix_ptr->g; sum_in_b -= stack_pix_ptr->b; sum_in_a -= stack_pix_ptr->a; } } } #endif }
private void stack_blur_gray8(ImageBuffer img, int rx, int ry) { throw new NotImplementedException(); #if false int x, y, xp, yp, i; int stack_ptr; int stack_start; byte *src_pix_ptr; byte *dst_pix_ptr; int pix; int stack_pix; int sum; int sum_in; int sum_out; int w = img.width(); int h = img.height(); int wm = w - 1; int hm = h - 1; int div; int mul_sum; int shr_sum; pod_vector <byte> stack; if (rx > 0) { if (rx > 254) { rx = 254; } div = rx * 2 + 1; mul_sum = stack_blur_tables.g_stack_blur8_mul[rx]; shr_sum = stack_blur_tables.g_stack_blur8_shr[rx]; stack.allocate(div); for (y = 0; y < h; y++) { sum = sum_in = sum_out = 0; src_pix_ptr = img.pix_ptr(0, y); pix = *src_pix_ptr; for (i = 0; i <= rx; i++) { stack[i] = pix; sum += pix * (i + 1); sum_out += pix; } for (i = 1; i <= rx; i++) { if (i <= wm) { src_pix_ptr += Img::pix_step; } pix = *src_pix_ptr; stack[i + rx] = pix; sum += pix * (rx + 1 - i); sum_in += pix; } stack_ptr = rx; xp = rx; if (xp > wm) { xp = wm; } src_pix_ptr = img.pix_ptr(xp, y); dst_pix_ptr = img.pix_ptr(0, y); for (x = 0; x < w; x++) { *dst_pix_ptr = (sum * mul_sum) >> shr_sum; dst_pix_ptr += Img::pix_step; sum -= sum_out; stack_start = stack_ptr + div - rx; if (stack_start >= div) { stack_start -= div; } sum_out -= stack[stack_start]; if (xp < wm) { src_pix_ptr += Img::pix_step; pix = *src_pix_ptr; ++xp; } stack[stack_start] = pix; sum_in += pix; sum += sum_in; ++stack_ptr; if (stack_ptr >= div) { stack_ptr = 0; } stack_pix = stack[stack_ptr]; sum_out += stack_pix; sum_in -= stack_pix; } } } if (ry > 0) { if (ry > 254) { ry = 254; } div = ry * 2 + 1; mul_sum = stack_blur_tables.g_stack_blur8_mul[ry]; shr_sum = stack_blur_tables.g_stack_blur8_shr[ry]; stack.allocate(div); int stride = img.stride(); for (x = 0; x < w; x++) { sum = sum_in = sum_out = 0; src_pix_ptr = img.pix_ptr(x, 0); pix = *src_pix_ptr; for (i = 0; i <= ry; i++) { stack[i] = pix; sum += pix * (i + 1); sum_out += pix; } for (i = 1; i <= ry; i++) { if (i <= hm) { src_pix_ptr += stride; } pix = *src_pix_ptr; stack[i + ry] = pix; sum += pix * (ry + 1 - i); sum_in += pix; } stack_ptr = ry; yp = ry; if (yp > hm) { yp = hm; } src_pix_ptr = img.pix_ptr(x, yp); dst_pix_ptr = img.pix_ptr(x, 0); for (y = 0; y < h; y++) { *dst_pix_ptr = (sum * mul_sum) >> shr_sum; dst_pix_ptr += stride; sum -= sum_out; stack_start = stack_ptr + div - ry; if (stack_start >= div) { stack_start -= div; } sum_out -= stack[stack_start]; if (yp < hm) { src_pix_ptr += stride; pix = *src_pix_ptr; ++yp; } stack[stack_start] = pix; sum_in += pix; sum += sum_in; ++stack_ptr; if (stack_ptr >= div) { stack_ptr = 0; } stack_pix = stack[stack_ptr]; sum_out += stack_pix; sum_in -= stack_pix; } } } #endif }
private void stack_blur_gray8(ImageBuffer img, int rx, int ry) { throw new NotImplementedException(); #if false int x, y, xp, yp, i; int stack_ptr; int stack_start; byte* src_pix_ptr; byte* dst_pix_ptr; int pix; int stack_pix; int sum; int sum_in; int sum_out; int w = img.width(); int h = img.height(); int wm = w - 1; int hm = h - 1; int div; int mul_sum; int shr_sum; pod_vector<byte> stack; if(rx > 0) { if(rx > 254) rx = 254; div = rx * 2 + 1; mul_sum = stack_blur_tables.g_stack_blur8_mul[rx]; shr_sum = stack_blur_tables.g_stack_blur8_shr[rx]; stack.allocate(div); for(y = 0; y < h; y++) { sum = sum_in = sum_out = 0; src_pix_ptr = img.pix_ptr(0, y); pix = *src_pix_ptr; for(i = 0; i <= rx; i++) { stack[i] = pix; sum += pix * (i + 1); sum_out += pix; } for(i = 1; i <= rx; i++) { if(i <= wm) src_pix_ptr += Img::pix_step; pix = *src_pix_ptr; stack[i + rx] = pix; sum += pix * (rx + 1 - i); sum_in += pix; } stack_ptr = rx; xp = rx; if(xp > wm) xp = wm; src_pix_ptr = img.pix_ptr(xp, y); dst_pix_ptr = img.pix_ptr(0, y); for(x = 0; x < w; x++) { *dst_pix_ptr = (sum * mul_sum) >> shr_sum; dst_pix_ptr += Img::pix_step; sum -= sum_out; stack_start = stack_ptr + div - rx; if(stack_start >= div) stack_start -= div; sum_out -= stack[stack_start]; if(xp < wm) { src_pix_ptr += Img::pix_step; pix = *src_pix_ptr; ++xp; } stack[stack_start] = pix; sum_in += pix; sum += sum_in; ++stack_ptr; if(stack_ptr >= div) stack_ptr = 0; stack_pix = stack[stack_ptr]; sum_out += stack_pix; sum_in -= stack_pix; } } } if(ry > 0) { if(ry > 254) ry = 254; div = ry * 2 + 1; mul_sum = stack_blur_tables.g_stack_blur8_mul[ry]; shr_sum = stack_blur_tables.g_stack_blur8_shr[ry]; stack.allocate(div); int stride = img.stride(); for(x = 0; x < w; x++) { sum = sum_in = sum_out = 0; src_pix_ptr = img.pix_ptr(x, 0); pix = *src_pix_ptr; for(i = 0; i <= ry; i++) { stack[i] = pix; sum += pix * (i + 1); sum_out += pix; } for(i = 1; i <= ry; i++) { if(i <= hm) src_pix_ptr += stride; pix = *src_pix_ptr; stack[i + ry] = pix; sum += pix * (ry + 1 - i); sum_in += pix; } stack_ptr = ry; yp = ry; if(yp > hm) yp = hm; src_pix_ptr = img.pix_ptr(x, yp); dst_pix_ptr = img.pix_ptr(x, 0); for(y = 0; y < h; y++) { *dst_pix_ptr = (sum * mul_sum) >> shr_sum; dst_pix_ptr += stride; sum -= sum_out; stack_start = stack_ptr + div - ry; if(stack_start >= div) stack_start -= div; sum_out -= stack[stack_start]; if(yp < hm) { src_pix_ptr += stride; pix = *src_pix_ptr; ++yp; } stack[stack_start] = pix; sum_in += pix; sum += sum_in; ++stack_ptr; if(stack_ptr >= div) stack_ptr = 0; stack_pix = stack[stack_ptr]; sum_out += stack_pix; sum_in -= stack_pix; } } } #endif }