diff options
Diffstat (limited to 'intern/cycles/kernel/svm/svm_ramp.h')
| -rw-r--r-- | intern/cycles/kernel/svm/svm_ramp.h | 49 |
1 files changed, 38 insertions, 11 deletions
diff --git a/intern/cycles/kernel/svm/svm_ramp.h b/intern/cycles/kernel/svm/svm_ramp.h index 062ab013b1f..48d969947f5 100644 --- a/intern/cycles/kernel/svm/svm_ramp.h +++ b/intern/cycles/kernel/svm/svm_ramp.h @@ -19,8 +19,27 @@ CCL_NAMESPACE_BEGIN -ccl_device float4 rgb_ramp_lookup(KernelGlobals *kg, int offset, float f, bool interpolate) +ccl_device float4 rgb_ramp_lookup(KernelGlobals *kg, + int offset, + float f, + bool interpolate, + bool extrapolate) { + if((f < 0.0f || f > 1.0f) && extrapolate) { + float4 t0, dy; + if(f < 0.0f) { + t0 = fetch_node_float(kg, offset); + dy = t0 - fetch_node_float(kg, offset + 1); + f = -f; + } + else { + t0 = fetch_node_float(kg, offset + RAMP_TABLE_SIZE - 1); + dy = t0 - fetch_node_float(kg, offset + RAMP_TABLE_SIZE - 2); + f = f - 1.0f; + } + return t0 + dy * f * (RAMP_TABLE_SIZE-1); + } + f = saturate(f)*(RAMP_TABLE_SIZE-1); /* clamp int as well in case of NaN */ @@ -43,7 +62,7 @@ ccl_device void svm_node_rgb_ramp(KernelGlobals *kg, ShaderData *sd, float *stac decode_node_uchar4(node.y, &fac_offset, &color_offset, &alpha_offset, NULL); float fac = stack_load_float(stack, fac_offset); - float4 color = rgb_ramp_lookup(kg, *offset, fac, interpolate); + float4 color = rgb_ramp_lookup(kg, *offset, fac, interpolate, false); if(stack_valid(color_offset)) stack_store_float3(stack, color_offset, float4_to_float3(color)); @@ -55,16 +74,24 @@ ccl_device void svm_node_rgb_ramp(KernelGlobals *kg, ShaderData *sd, float *stac ccl_device void svm_node_rgb_curves(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node, int *offset) { - uint fac_offset = node.y; - uint color_offset = node.z; - uint out_offset = node.w; + uint fac_offset, color_offset, out_offset; + decode_node_uchar4(node.y, + &fac_offset, + &color_offset, + &out_offset, + NULL); float fac = stack_load_float(stack, fac_offset); float3 color = stack_load_float3(stack, color_offset); - float r = rgb_ramp_lookup(kg, *offset, color.x, true).x; - float g = rgb_ramp_lookup(kg, *offset, color.y, true).y; - float b = rgb_ramp_lookup(kg, *offset, color.z, true).z; + const float min_x = __int_as_float(node.z), + max_x = __int_as_float(node.w); + const float range_x = max_x - min_x; + color = (color - make_float3(min_x, min_x, min_x)) / range_x; + + float r = rgb_ramp_lookup(kg, *offset, color.x, true, true).x; + float g = rgb_ramp_lookup(kg, *offset, color.y, true, true).y; + float b = rgb_ramp_lookup(kg, *offset, color.z, true, true).z; color = (1.0f - fac)*color + fac*make_float3(r, g, b); stack_store_float3(stack, out_offset, color); @@ -81,9 +108,9 @@ ccl_device void svm_node_vector_curves(KernelGlobals *kg, ShaderData *sd, float float fac = stack_load_float(stack, fac_offset); float3 color = stack_load_float3(stack, color_offset); - float r = rgb_ramp_lookup(kg, *offset, (color.x + 1.0f)*0.5f, true).x; - float g = rgb_ramp_lookup(kg, *offset, (color.y + 1.0f)*0.5f, true).y; - float b = rgb_ramp_lookup(kg, *offset, (color.z + 1.0f)*0.5f, true).z; + float r = rgb_ramp_lookup(kg, *offset, (color.x + 1.0f)*0.5f, true, false).x; + float g = rgb_ramp_lookup(kg, *offset, (color.y + 1.0f)*0.5f, true, false).y; + float b = rgb_ramp_lookup(kg, *offset, (color.z + 1.0f)*0.5f, true, false).z; color = (1.0f - fac)*color + fac*make_float3(r*2.0f - 1.0f, g*2.0f - 1.0f, b*2.0f - 1.0f); stack_store_float3(stack, out_offset, color); |