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Differential D6093 Diff 19657 source/blender/draw/editors/shaders/image_uv_editor_region_frag.glsl

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source/blender/draw/editors/shaders/image_uv_editor_region_frag.glsl

  • This file was added.
uniform sampler2D image;
/* UIResouces.TH_BACK */
uniform vec3 uiColorBackground;
uniform vec3 uiColorBackgroundShade;
uniform vec4 shuffleChannels;
/* Normalize to scene camera far/near plane */
uniform float cameraClipStart = 0.1;
uniform float cameraClipEnd = 100.0;
uniform float cameraClipScale = 0.01;
uniform float gridZoomLevel = 5.0;
uniform vec2 halfFragmentSizeUV;
in vec2 texCoord_interp;
out vec4 fragColor;
#ifdef IMAGE_SHADER_FLAG_NORMALIZE_DEPTH
float normalize_depth(float input_depth)
{
float clippedValue = mix(0.0, 1.0, 1.0 - (input_depth - cameraClipStart) * cameraClipScale);
clippedValue = clamp(clippedValue, 0.0, 1.0);
/* Add a small curvation to show the depth texture better */
clippedValue *= clippedValue;
return clippedValue;
}
#endif /* IMAGE_SHADER_FLAG_NORMALIZE_DEPTH */
#ifndef IMAGE_SHADER_FLAG_VALID_IMAGE
float grid_line(vec2 uv, float num_lines)
{
float inv_num_lines = 64.0;
// vec2 line_uv = (mod(((uv * num_lines)), 1.0) - (1.0 - inv_num_lines)) * num_lines;
vec2 line_uv = mod(((uv * num_lines)), 1.0);
line_uv = abs((line_uv - 0.5) * 2.0);
float line = max(line_uv.x, line_uv.y);
line = line * inv_num_lines - (inv_num_lines - 1.0);
line = clamp(line, 0.0, 1.0);
return line;
}
#endif /* !IMAGE_SHADER_FLAG_VALID_IMAGE */
vec4 sample_texture(vec2 uv)
{
vec2 clamped_uv;
#ifdef IMAGE_SHADER_FLAG_REPEAT_IMAGE
clamped_uv = fract(uv);
#else /* IMAGE_SHADER_FLAG_REPEAT_IMAGE */
clamped_uv = uv;
#endif /* IMAGE_SHADER_FLAG_REPEAT_IMAGE */
return texture(image, clamped_uv);
}
void main()
{
vec4 color;
#ifndef IMAGE_SHADER_FLAG_REPEAT_IMAGE
if (texCoord_interp.x < 0.0 || texCoord_interp.x > 1.0 || texCoord_interp.y < 0.0 ||
texCoord_interp.y > 1.0) {
/* set alpha to 1 so checkerboard does not bleed in */
fragColor = vec4(uiColorBackground, 1.0);
return;
}
#endif /* !IMAGE_SHADER_FLAG_REPEAT_IMAGE */
#ifdef IMAGE_SHADER_FLAG_VALID_IMAGE
# ifdef IMAGE_SHADER_FLAG_SMOOTH_DRAW
color = (sample_texture(texCoord_interp) +
sample_texture(texCoord_interp + vec2(halfFragmentSizeUV.x, -halfFragmentSizeUV.y)) +
sample_texture(texCoord_interp + vec2(halfFragmentSizeUV.x, halfFragmentSizeUV.y)) +
sample_texture(texCoord_interp + vec2(-halfFragmentSizeUV.x, -halfFragmentSizeUV.y)) +
sample_texture(texCoord_interp + vec2(-halfFragmentSizeUV.x, halfFragmentSizeUV.y))) *
0.20;
# else /* IMAGE_SHADER_FLAG_SMOOTH_DRAW */
color = sample_texture(image, texCoord_interp);
# endif /* IMAGE_SHADER_FLAG_SMOOTH_DRAW */
# ifdef IMAGE_SHADER_FLAG_SHUFFLE_CHANNELS
float shuffled_channel = color.r * shuffleChannels.r + color.g * shuffleChannels.g +
color.b * shuffleChannels.b + color.a * shuffleChannels.a;
# ifdef IMAGE_SHADER_FLAG_NORMALIZE_DEPTH
shuffled_channel = normalize_depth(shuffled_channel);
# endif /* IMAGE_SHADER_FLAG_NORMALIZE_DEPTH */
color = vec4(shuffled_channel);
# endif /* IMAGE_SHADER_FLAG_SHUFFLE_CHANNELS */
# ifndef IMAGE_SHADER_FLAG_USE_ALPHA
color.a = 1.0;
# endif /* !IMAGE_SHADER_FLAG_USE_ALPHA */
#else /* IMAGE_SHADER_FLAG_VALID_IMAGE */
/* draw grid */
/* TODO: improve render quality */
float zoom_1 = pow(4.0, floor(gridZoomLevel));
float zoom_2 = zoom_1 * 4.0f;
float inv_zoom_mix_factor = fract(gridZoomLevel);
float line = mix(
grid_line(texCoord_interp, zoom_1), grid_line(texCoord_interp, zoom_2), inv_zoom_mix_factor);
color.rgb = mix(uiColorBackgroundShade, uiColorBackground, line);
color.a = 1.0;
#endif /* IMAGE_SHADER_FLAG_VALID_IMAGE */
fragColor = color;
}
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