41 lines
1.8 KiB
GLSL
41 lines
1.8 KiB
GLSL
// [COMBO] {"material":"ui_editor_properties_point_filter","combo":"POINTFILTER","type":"options","default":1}
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// [COMBO] {"material":"ui_editor_properties_multiply","combo":"MULTIPLY","type":"options","default":1}
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uniform vec4 g_Texture0Resolution;
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uniform vec2 g_TexelSize;
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// The coordinates of the current pixel within the space spanning (0, 0) to (new x, new y).
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varying vec2 v_PixelCoord;
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// x and y are the width and height of a 'new' pixel in 0 to 1 coordinate space. z and w are the same for an old pixel
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varying vec4 v_PixelSize;
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uniform sampler2D g_Texture0; // {"material":"framebuffer","label":"ui_editor_properties_framebuffer","hidden":true}
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#ifdef HLSL
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#define fract frac
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#endif
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void main() {
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#if POINTFILTER
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// Sample the nearest 'old' pixel
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vec2 texCoord00 = round(v_PixelCoord) * v_PixelSize.xy;
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texCoord00 = round(texCoord00 * g_Texture0Resolution.xy) * v_PixelSize.zw + v_PixelSize.zw * 0.5;
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vec4 finalColor = texSample2D(g_Texture0, texCoord00);
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#else
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// Bilinear Filtering
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vec2 texCoord00 = floor(v_PixelCoord) * v_PixelSize.xy; // Top-left
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vec2 texCoord01 = texCoord00 + vec2(0.0, v_PixelSize.y); // Bottom-left
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vec2 texCoord10 = texCoord00 + vec2(v_PixelSize.x, 0.0); // Top-right
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vec2 texCoord11 = texCoord00 + vec2(v_PixelSize.x, v_PixelSize.y); // Bottom-right
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vec2 lerp = fract(v_PixelCoord);
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// Sample each corner pixel, weighted by how close this subpixel is to them.
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vec4 finalColor = texSample2D(g_Texture0, texCoord00) * (1.0 - lerp.x) * (1.0 - lerp.y) +
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texSample2D(g_Texture0, texCoord01) * (1.0 - lerp.x) * lerp.y +
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texSample2D(g_Texture0, texCoord10) * lerp.x * (1.0 - lerp.y) +
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texSample2D(g_Texture0, texCoord11) * lerp.x * lerp.y;
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#endif
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gl_FragColor = finalColor;
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}
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