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Fix #35004: fireflies with .tif image in cycles, try to avoid extreme values when

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openimageio can't detect premul/straight alpha correct.
This commit is contained in:
Brecht Van Lommel
2013-04-17 14:47:58 +00:00
parent 0fc4f4b791
commit cf0e457e52
4 changed files with 31 additions and 7 deletions
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17
intern/cycles/kernel/shaders/node_image_texture.osl
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@@ -19,12 +19,16 @@
#include "stdosl.h"
#include "node_color.h"
color image_texture_lookup(string filename, string color_space, float u, float v, output float Alpha, int use_alpha)
color image_texture_lookup(string filename, string color_space, float u, float v, output float Alpha, int use_alpha, int is_float)
{
color rgb = (color)texture(filename, u, 1.0 - v, "wrap", "periodic", "alpha", Alpha);
if (use_alpha)
if (use_alpha) {
rgb = color_unpremultiply(rgb, Alpha);
if (!is_float)
rgb = min(rgb, 1.0);
}
if (color_space == "sRGB")
rgb = color_srgb_to_scene_linear(rgb);
@@ -40,6 +44,7 @@ shader node_image_texture(
string color_space = "sRGB",
string projection = "Flat",
float projection_blend = 0.0,
int is_float = 1,
output color Color = 0.0,
output float Alpha = 1.0)
{
@@ -51,7 +56,7 @@ shader node_image_texture(
int use_alpha = isconnected(Alpha);
if (projection == "Flat") {
Color = image_texture_lookup(filename, color_space, p[0], p[1], Alpha, use_alpha);
Color = image_texture_lookup(filename, color_space, p[0], p[1], Alpha, use_alpha, is_float);
}
else if (projection == "Box") {
/* object space normal */
@@ -116,15 +121,15 @@ shader node_image_texture(
float tmp_alpha;
if (weight[0] > 0.0) {
Color += weight[0] * image_texture_lookup(filename, color_space, p[1], p[2], tmp_alpha, use_alpha);
Color += weight[0] * image_texture_lookup(filename, color_space, p[1], p[2], tmp_alpha, use_alpha, is_float);
Alpha += weight[0] * tmp_alpha;
}
if (weight[1] > 0.0) {
Color += weight[1] * image_texture_lookup(filename, color_space, p[0], p[2], tmp_alpha, use_alpha);
Color += weight[1] * image_texture_lookup(filename, color_space, p[0], p[2], tmp_alpha, use_alpha, is_float);
Alpha += weight[1] * tmp_alpha;
}
if (weight[2] > 0.0) {
Color += weight[2] * image_texture_lookup(filename, color_space, p[1], p[0], tmp_alpha, use_alpha);
Color += weight[2] * image_texture_lookup(filename, color_space, p[1], p[0], tmp_alpha, use_alpha, is_float);
Alpha += weight[2] * tmp_alpha;
}
}