42 lines
1.0 KiB
GLSL
42 lines
1.0 KiB
GLSL
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#ifdef __cplusplus
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#include <string>
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const std::string shader_highlight_frag = R"("
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#version 300 es
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precision mediump float;
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out vec4 FragColor;
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in vec2 uv;
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in vec2 pos;
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uniform sampler2D tex;
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uniform ivec4 size;
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uniform vec4 mousePos;
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void main() {
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vec2 texelSize = 1.0 / vec2(float(size.x), float(size.y));
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vec4 result = vec4(0.0, 0.0, 0.0, 0.0);
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for (int x = -size.z; x <= size.z; ++x) {
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for (int y = -size.w; y <= size.w; ++y) {
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vec2 offset = (vec2(float(x), float(y)) * texelSize);
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result += texture(tex, uv + offset);
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}
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}
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float px = mousePos.x / float(size.x);
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float py = mousePos.y / float(size.y);
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float dx = (gl_FragCoord.x - mousePos.x) / float(size.x);
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float dy = (gl_FragCoord.y - mousePos.y) / float(size.y);
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float distx = sqrt(dx * dx);
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float disty = sqrt(dy * dy);
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vec4 n_color = result / vec4((float(size.z) * 2.0 + 1.0) * (float(size.w) * 2.0 + 1.0));
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FragColor = vec4(distx, disty, 0.0, 1.0);
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//FragColor = ;
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}
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")";
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#endif
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