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Diffstat (limited to 'intern/cycles/kernel/kernels/opencl/kernel_opencl_image.h')
-rw-r--r--intern/cycles/kernel/kernels/opencl/kernel_opencl_image.h246
1 files changed, 246 insertions, 0 deletions
diff --git a/intern/cycles/kernel/kernels/opencl/kernel_opencl_image.h b/intern/cycles/kernel/kernels/opencl/kernel_opencl_image.h
new file mode 100644
index 00000000000..faa9dd66d0e
--- /dev/null
+++ b/intern/cycles/kernel/kernels/opencl/kernel_opencl_image.h
@@ -0,0 +1,246 @@
+/*
+ * Copyright 2016 Blender Foundation
+ *
+ * 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.
+ */
+
+/* For OpenCL we do manual lookup and interpolation. */
+
+ccl_device_inline ccl_global TextureInfo* kernel_tex_info(KernelGlobals *kg, uint id) {
+ const uint tex_offset = id
+#define KERNEL_TEX(type, name) + 1
+#include "kernel/kernel_textures.h"
+ ;
+
+ return &((ccl_global TextureInfo*)kg->buffers[0])[tex_offset];
+}
+
+#define tex_fetch(type, info, index) ((ccl_global type*)(kg->buffers[info->cl_buffer] + info->data))[(index)]
+
+ccl_device_inline int svm_image_texture_wrap_periodic(int x, int width)
+{
+ x %= width;
+ if(x < 0)
+ x += width;
+ return x;
+}
+
+ccl_device_inline int svm_image_texture_wrap_clamp(int x, int width)
+{
+ return clamp(x, 0, width-1);
+}
+
+ccl_device_inline float4 svm_image_texture_read(KernelGlobals *kg, const ccl_global TextureInfo *info, int id, int offset)
+{
+ const int texture_type = kernel_tex_type(id);
+
+ /* Float4 */
+ if(texture_type == IMAGE_DATA_TYPE_FLOAT4) {
+ return tex_fetch(float4, info, offset);
+ }
+ /* Byte4 */
+ else if(texture_type == IMAGE_DATA_TYPE_BYTE4) {
+ uchar4 r = tex_fetch(uchar4, info, offset);
+ float f = 1.0f/255.0f;
+ return make_float4(r.x*f, r.y*f, r.z*f, r.w*f);
+ }
+ /* Float */
+ else if(texture_type == IMAGE_DATA_TYPE_FLOAT) {
+ float f = tex_fetch(float, info, offset);
+ return make_float4(f, f, f, 1.0f);
+ }
+ /* Byte */
+ else {
+ uchar r = tex_fetch(uchar, info, offset);
+ float f = r * (1.0f/255.0f);
+ return make_float4(f, f, f, 1.0f);
+ }
+}
+
+ccl_device_inline float4 svm_image_texture_read_2d(KernelGlobals *kg, int id, int x, int y)
+{
+ const ccl_global TextureInfo *info = kernel_tex_info(kg, id);
+
+ /* Wrap */
+ if(info->extension == EXTENSION_REPEAT) {
+ x = svm_image_texture_wrap_periodic(x, info->width);
+ y = svm_image_texture_wrap_periodic(y, info->height);
+ }
+ else {
+ x = svm_image_texture_wrap_clamp(x, info->width);
+ y = svm_image_texture_wrap_clamp(y, info->height);
+ }
+
+ int offset = x + info->width * y;
+ return svm_image_texture_read(kg, info, id, offset);
+}
+
+ccl_device_inline float4 svm_image_texture_read_3d(KernelGlobals *kg, int id, int x, int y, int z)
+{
+ const ccl_global TextureInfo *info = kernel_tex_info(kg, id);
+
+ /* Wrap */
+ if(info->extension == EXTENSION_REPEAT) {
+ x = svm_image_texture_wrap_periodic(x, info->width);
+ y = svm_image_texture_wrap_periodic(y, info->height);
+ z = svm_image_texture_wrap_periodic(z, info->depth);
+ }
+ else {
+ x = svm_image_texture_wrap_clamp(x, info->width);
+ y = svm_image_texture_wrap_clamp(y, info->height);
+ z = svm_image_texture_wrap_clamp(z, info->depth);
+ }
+
+ int offset = x + info->width * y + info->width * info->height * z;
+ return svm_image_texture_read(kg, info, id, offset);
+}
+
+
+ccl_device_inline float svm_image_texture_frac(float x, int *ix)
+{
+ int i = float_to_int(x) - ((x < 0.0f)? 1: 0);
+ *ix = i;
+ return x - (float)i;
+}
+
+#define SET_CUBIC_SPLINE_WEIGHTS(u, t) \
+ { \
+ u[0] = (((-1.0f/6.0f)* t + 0.5f) * t - 0.5f) * t + (1.0f/6.0f); \
+ u[1] = (( 0.5f * t - 1.0f) * t ) * t + (2.0f/3.0f); \
+ u[2] = (( -0.5f * t + 0.5f) * t + 0.5f) * t + (1.0f/6.0f); \
+ u[3] = (1.0f / 6.0f) * t * t * t; \
+ } (void)0
+
+ccl_device float4 kernel_tex_image_interp(KernelGlobals *kg, int id, float x, float y)
+{
+ const ccl_global TextureInfo *info = kernel_tex_info(kg, id);
+
+ if(info->extension == EXTENSION_CLIP) {
+ if(x < 0.0f || y < 0.0f || x > 1.0f || y > 1.0f) {
+ return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
+ }
+ }
+
+ if(info->interpolation == INTERPOLATION_CLOSEST) {
+ /* Closest interpolation. */
+ int ix, iy;
+ svm_image_texture_frac(x*info->width, &ix);
+ svm_image_texture_frac(y*info->height, &iy);
+
+ return svm_image_texture_read_2d(kg, id, ix, iy);
+ }
+ else if(info->interpolation == INTERPOLATION_LINEAR) {
+ /* Bilinear interpolation. */
+ int ix, iy;
+ float tx = svm_image_texture_frac(x*info->width - 0.5f, &ix);
+ float ty = svm_image_texture_frac(y*info->height - 0.5f, &iy);
+
+ float4 r;
+ r = (1.0f - ty)*(1.0f - tx)*svm_image_texture_read_2d(kg, id, ix, iy);
+ r += (1.0f - ty)*tx*svm_image_texture_read_2d(kg, id, ix+1, iy);
+ r += ty*(1.0f - tx)*svm_image_texture_read_2d(kg, id, ix, iy+1);
+ r += ty*tx*svm_image_texture_read_2d(kg, id, ix+1, iy+1);
+ return r;
+ }
+ else {
+ /* Bicubic interpolation. */
+ int ix, iy;
+ float tx = svm_image_texture_frac(x*info->width - 0.5f, &ix);
+ float ty = svm_image_texture_frac(y*info->height - 0.5f, &iy);
+
+ float u[4], v[4];
+ SET_CUBIC_SPLINE_WEIGHTS(u, tx);
+ SET_CUBIC_SPLINE_WEIGHTS(v, ty);
+
+ float4 r = make_float4(0.0f, 0.0f, 0.0f, 0.0f);
+
+ for(int y = 0; y < 4; y++) {
+ for(int x = 0; x < 4; x++) {
+ float weight = u[x]*v[y];
+ r += weight*svm_image_texture_read_2d(kg, id, ix+x-1, iy+y-1);
+ }
+ }
+ return r;
+ }
+}
+
+
+ccl_device float4 kernel_tex_image_interp_3d(KernelGlobals *kg, int id, float x, float y, float z, int interp)
+{
+ const ccl_global TextureInfo *info = kernel_tex_info(kg, id);
+
+ if(info->extension == EXTENSION_CLIP) {
+ if(x < 0.0f || y < 0.0f || z < 0.0f ||
+ x > 1.0f || y > 1.0f || z > 1.0f)
+ {
+ return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
+ }
+ }
+
+ uint interpolation = (interp == INTERPOLATION_NONE)? info->interpolation: interp;
+
+ if(interpolation == INTERPOLATION_CLOSEST) {
+ /* Closest interpolation. */
+ int ix, iy, iz;
+ svm_image_texture_frac(x*info->width, &ix);
+ svm_image_texture_frac(y*info->height, &iy);
+ svm_image_texture_frac(z*info->depth, &iz);
+
+ return svm_image_texture_read_3d(kg, id, ix, iy, iz);
+ }
+ else if(interpolation == INTERPOLATION_LINEAR) {
+ /* Bilinear interpolation. */
+ int ix, iy, iz;
+ float tx = svm_image_texture_frac(x*info->width - 0.5f, &ix);
+ float ty = svm_image_texture_frac(y*info->height - 0.5f, &iy);
+ float tz = svm_image_texture_frac(z*info->depth - 0.5f, &iz);
+
+ float4 r;
+ r = (1.0f - tz)*(1.0f - ty)*(1.0f - tx)*svm_image_texture_read_3d(kg, id, ix, iy, iz);
+ r += (1.0f - tz)*(1.0f - ty)*tx*svm_image_texture_read_3d(kg, id, ix+1, iy, iz);
+ r += (1.0f - tz)*ty*(1.0f - tx)*svm_image_texture_read_3d(kg, id, ix, iy+1, iz);
+ r += (1.0f - tz)*ty*tx*svm_image_texture_read_3d(kg, id, ix+1, iy+1, iz);
+
+ r += tz*(1.0f - ty)*(1.0f - tx)*svm_image_texture_read_3d(kg, id, ix, iy, iz+1);
+ r += tz*(1.0f - ty)*tx*svm_image_texture_read_3d(kg, id, ix+1, iy, iz+1);
+ r += tz*ty*(1.0f - tx)*svm_image_texture_read_3d(kg, id, ix, iy+1, iz+1);
+ r += tz*ty*tx*svm_image_texture_read_3d(kg, id, ix+1, iy+1, iz+1);
+ return r;
+ }
+ else {
+ /* Bicubic interpolation. */
+ int ix, iy, iz;
+ float tx = svm_image_texture_frac(x*info->width - 0.5f, &ix);
+ float ty = svm_image_texture_frac(y*info->height - 0.5f, &iy);
+ float tz = svm_image_texture_frac(z*info->depth - 0.5f, &iz);
+
+ float u[4], v[4], w[4];
+ SET_CUBIC_SPLINE_WEIGHTS(u, tx);
+ SET_CUBIC_SPLINE_WEIGHTS(v, ty);
+ SET_CUBIC_SPLINE_WEIGHTS(w, tz);
+
+ float4 r = make_float4(0.0f, 0.0f, 0.0f, 0.0f);
+
+ for(int z = 0; z < 4; z++) {
+ for(int y = 0; y < 4; y++) {
+ for(int x = 0; x < 4; x++) {
+ float weight = u[x]*v[y]*w[z];
+ r += weight*svm_image_texture_read_3d(kg, id, ix+x-1, iy+y-1, iz+z-1);
+ }
+ }
+ }
+ return r;
+ }
+}
+
+#undef SET_CUBIC_SPLINE_WEIGHTS
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