diff options
Diffstat (limited to 'intern/opencolorio/gpu_shader_display_transform.glsl')
| -rw-r--r-- | intern/opencolorio/gpu_shader_display_transform.glsl | 183 |
1 files changed, 94 insertions, 89 deletions
diff --git a/intern/opencolorio/gpu_shader_display_transform.glsl b/intern/opencolorio/gpu_shader_display_transform.glsl index f1dca04b823..04e96e8ed3c 100644 --- a/intern/opencolorio/gpu_shader_display_transform.glsl +++ b/intern/opencolorio/gpu_shader_display_transform.glsl @@ -32,135 +32,140 @@ uniform vec3 curve_mapping_bwmul; float read_curve_mapping(int table, int index) { - /* TODO(sergey): Without -1 here image is getting darken after applying unite curve. - * But is it actually correct to subtract 1 here? - */ - float texture_index = float(index) / float(curve_mapping_lut_size - 1); - return texture(curve_mapping_texture, texture_index)[table]; + /* TODO(sergey): Without -1 here image is getting darken after applying unite curve. + * But is it actually correct to subtract 1 here? + */ + float texture_index = float(index) / float(curve_mapping_lut_size - 1); + return texture(curve_mapping_texture, texture_index)[table]; } float curvemap_calc_extend(int table, float x, vec2 first, vec2 last) { - if (x <= first[0]) { - if (use_curve_mapping_extend_extrapolate[table] == 0) { - /* no extrapolate */ - return first[1]; - } - else { - if (curve_mapping_ext_in_x[table] == 0.0) - return first[1] + curve_mapping_ext_in_y[table] * 10000.0; - else - return first[1] + curve_mapping_ext_in_y[table] * (x - first[0]) / curve_mapping_ext_in_x[table]; - } - } - else if (x >= last[0]) { - if (use_curve_mapping_extend_extrapolate[table] == 0) { - /* no extrapolate */ - return last[1]; - } - else { - if (curve_mapping_ext_out_x[table] == 0.0) - return last[1] - curve_mapping_ext_out_y[table] * 10000.0; - else - return last[1] + curve_mapping_ext_out_y[table] * (x - last[0]) / curve_mapping_ext_out_x[table]; - } - } - return 0.0; + if (x <= first[0]) { + if (use_curve_mapping_extend_extrapolate[table] == 0) { + /* no extrapolate */ + return first[1]; + } + else { + if (curve_mapping_ext_in_x[table] == 0.0) + return first[1] + curve_mapping_ext_in_y[table] * 10000.0; + else + return first[1] + + curve_mapping_ext_in_y[table] * (x - first[0]) / curve_mapping_ext_in_x[table]; + } + } + else if (x >= last[0]) { + if (use_curve_mapping_extend_extrapolate[table] == 0) { + /* no extrapolate */ + return last[1]; + } + else { + if (curve_mapping_ext_out_x[table] == 0.0) + return last[1] - curve_mapping_ext_out_y[table] * 10000.0; + else + return last[1] + + curve_mapping_ext_out_y[table] * (x - last[0]) / curve_mapping_ext_out_x[table]; + } + } + return 0.0; } float curvemap_evaluateF(int table, float value) { - float mintable_ = curve_mapping_mintable[table]; - float range = curve_mapping_range[table]; - float mintable = 0.0; - int CM_TABLE = curve_mapping_lut_size - 1; - - float fi; - int i; - - /* index in table */ - fi = (value - mintable) * range; - i = int(fi); - - /* fi is table float index and should check against table range i.e. [0.0 CM_TABLE] */ - if (fi < 0.0 || fi > float(CM_TABLE)) { - return curvemap_calc_extend(table, value, - vec2(curve_mapping_first_x[table], curve_mapping_first_y[table]), - vec2(curve_mapping_last_x[table], curve_mapping_last_y[table])); - } - else { - if (i < 0) return read_curve_mapping(table, 0); - if (i >= CM_TABLE) return read_curve_mapping(table, CM_TABLE); - - fi = fi - float(i); - return (1.0 - fi) * read_curve_mapping(table, i) + fi * read_curve_mapping(table, i + 1); - } + float mintable_ = curve_mapping_mintable[table]; + float range = curve_mapping_range[table]; + float mintable = 0.0; + int CM_TABLE = curve_mapping_lut_size - 1; + + float fi; + int i; + + /* index in table */ + fi = (value - mintable) * range; + i = int(fi); + + /* fi is table float index and should check against table range i.e. [0.0 CM_TABLE] */ + if (fi < 0.0 || fi > float(CM_TABLE)) { + return curvemap_calc_extend(table, + value, + vec2(curve_mapping_first_x[table], curve_mapping_first_y[table]), + vec2(curve_mapping_last_x[table], curve_mapping_last_y[table])); + } + else { + if (i < 0) + return read_curve_mapping(table, 0); + if (i >= CM_TABLE) + return read_curve_mapping(table, CM_TABLE); + + fi = fi - float(i); + return (1.0 - fi) * read_curve_mapping(table, i) + fi * read_curve_mapping(table, i + 1); + } } vec4 curvemapping_evaluate_premulRGBF(vec4 col) { - vec4 result = col; - result[0] = curvemap_evaluateF(0, (col[0] - curve_mapping_black[0]) * curve_mapping_bwmul[0]); - result[1] = curvemap_evaluateF(1, (col[1] - curve_mapping_black[1]) * curve_mapping_bwmul[1]); - result[2] = curvemap_evaluateF(2, (col[2] - curve_mapping_black[2]) * curve_mapping_bwmul[2]); - result[3] = col[3]; - return result; + vec4 result = col; + result[0] = curvemap_evaluateF(0, (col[0] - curve_mapping_black[0]) * curve_mapping_bwmul[0]); + result[1] = curvemap_evaluateF(1, (col[1] - curve_mapping_black[1]) * curve_mapping_bwmul[1]); + result[2] = curvemap_evaluateF(2, (col[2] - curve_mapping_black[2]) * curve_mapping_bwmul[2]); + result[3] = col[3]; + return result; } #endif #ifdef USE_DITHER float dither_random_value(vec2 co) { - return fract(sin(dot(co.xy, vec2(12.9898, 78.233))) * 43758.5453) * 0.005 * dither; + return fract(sin(dot(co.xy, vec2(12.9898, 78.233))) * 43758.5453) * 0.005 * dither; } vec2 round_to_pixel(vec2 st) { - vec2 result; - vec2 size = textureSize(image_texture, 0); - result.x = float(int(st.x * size.x)) / size.x; - result.y = float(int(st.y * size.y)) / size.y; - return result; + vec2 result; + vec2 size = textureSize(image_texture, 0); + result.x = float(int(st.x * size.x)) / size.x; + result.y = float(int(st.y * size.y)) / size.y; + return result; } vec4 apply_dither(vec2 st, vec4 col) { - vec4 result; - float random_value = dither_random_value(round_to_pixel(st)); - result.r = col.r + random_value; - result.g = col.g + random_value; - result.b = col.b + random_value; - result.a = col.a; - return result; + vec4 result; + float random_value = dither_random_value(round_to_pixel(st)); + result.r = col.r + random_value; + result.g = col.g + random_value; + result.b = col.b + random_value; + result.a = col.a; + return result; } #endif void main() { - vec4 col = texture(image_texture, texCoord_interp.st); + vec4 col = texture(image_texture, texCoord_interp.st); #ifdef USE_CURVE_MAPPING - col = curvemapping_evaluate_premulRGBF(col); + col = curvemapping_evaluate_premulRGBF(col); #endif #ifdef USE_PREDIVIDE - if (col[3] > 0.0 && col[3] < 1.0) { - float inv_alpha = 1.0 / col[3]; - col[0] *= inv_alpha; - col[1] *= inv_alpha; - col[2] *= inv_alpha; - } + if (col[3] > 0.0 && col[3] < 1.0) { + float inv_alpha = 1.0 / col[3]; + col[0] *= inv_alpha; + col[1] *= inv_alpha; + col[2] *= inv_alpha; + } #endif - /* NOTE: This is true we only do de-premul here and NO premul - * and the reason is simple -- opengl is always configured - * for straight alpha at this moment - */ + /* NOTE: This is true we only do de-premul here and NO premul + * and the reason is simple -- opengl is always configured + * for straight alpha at this moment + */ - vec4 result = OCIODisplay(col, lut3d_texture); + vec4 result = OCIODisplay(col, lut3d_texture); #ifdef USE_DITHER - result = apply_dither(texCoord_interp.st, result); + result = apply_dither(texCoord_interp.st, result); #endif - fragColor = result; + fragColor = result; } |