diff options
Diffstat (limited to 'tests/RenderScriptTests/ImageProcessing2/src/com/android/rs/image/fisheye.rsh')
-rw-r--r-- | tests/RenderScriptTests/ImageProcessing2/src/com/android/rs/image/fisheye.rsh | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/tests/RenderScriptTests/ImageProcessing2/src/com/android/rs/image/fisheye.rsh b/tests/RenderScriptTests/ImageProcessing2/src/com/android/rs/image/fisheye.rsh deleted file mode 100644 index 2eacb7d..0000000 --- a/tests/RenderScriptTests/ImageProcessing2/src/com/android/rs/image/fisheye.rsh +++ /dev/null @@ -1,58 +0,0 @@ -/* - * Copyright (C) 2012 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -rs_allocation in_alloc; -rs_sampler sampler; - -static float2 center, neg_center, inv_dimensions, axis_scale; -static float alpha, radius2, factor; - -void init_filter(uint32_t dim_x, uint32_t dim_y, float center_x, float center_y, float k) { - center.x = center_x; - center.y = center_y; - neg_center = -center; - inv_dimensions.x = 1.f / (float)dim_x; - inv_dimensions.y = 1.f / (float)dim_y; - alpha = k * 2.0f + 0.75f; - - axis_scale = (float2)1.f; - if (dim_x > dim_y) - axis_scale.y = (float)dim_y / (float)dim_x; - else - axis_scale.x = (float)dim_x / (float)dim_y; - - const float bound2 = 0.25f * (axis_scale.x*axis_scale.x + axis_scale.y*axis_scale.y); - const float bound = sqrt(bound2); - const float radius = 1.15f * bound; - radius2 = radius*radius; - const float max_radian = M_PI_2 - atan(alpha / bound * sqrt(radius2 - bound2)); - factor = bound / max_radian; -} - -uchar4 __attribute__((kernel)) root(uint32_t x, uint32_t y) { - // Convert x and y to floating point coordinates with center as origin - const float2 inCoord = {(float)x, (float)y}; - const float2 coord = mad(inCoord, inv_dimensions, neg_center); - const float2 scaledCoord = axis_scale * coord; - const float dist2 = scaledCoord.x*scaledCoord.x + scaledCoord.y*scaledCoord.y; - const float inv_dist = rsqrt(dist2); - const float radian = M_PI_2 - atan((alpha * sqrt(radius2 - dist2)) * inv_dist); - const float scalar = radian * factor * inv_dist; - const float2 new_coord = mad(coord, scalar, center); - const float4 fout = rsSample(in_alloc, sampler, new_coord); - return rsPackColorTo8888(fout); -} - |