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https://github.com/Ttanasart-pt/Pixel-Composer.git
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62 lines
No EOL
2 KiB
Text
62 lines
No EOL
2 KiB
Text
function surface_apply_gaussian(surface, size, bg = false, bg_c = c_white, sampleMode = 0, overColor = noone) {
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static uni_bor = shader_get_uniform(sh_blur_gaussian, "sampleMode");
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static uni_dim = shader_get_uniform(sh_blur_gaussian, "dimension");
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static uni_hor = shader_get_uniform(sh_blur_gaussian, "horizontal");
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static uni_wei = shader_get_uniform(sh_blur_gaussian, "weight");
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static uni_sze = shader_get_uniform(sh_blur_gaussian, "size");
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static uni_ovr = shader_get_uniform(sh_blur_gaussian, "overrideColor");
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static uni_ovc = shader_get_uniform(sh_blur_gaussian, "overColor");
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var hori = surface_create_valid(surface_get_width(surface), surface_get_height(surface));
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var vert = surface_create_valid(surface_get_width(surface), surface_get_height(surface));
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#region kernel generation
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size = max(1, round(size));
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var gau_array = array_create(size);
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var we = 0;
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var b = 0.3 * ((size - 1) * 0.5 - 1) + 0.8;
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for(var i = 0; i < size; i++) {
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var _x = i * .5;
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gau_array[i] = (1 / sqrt(2 * pi * b)) * exp( -sqr(_x) / (2 * sqr(b)) );
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we += i? gau_array[i] * 2 : gau_array[i];
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}
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for(var i = 0; i < size; i++) {
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gau_array[i] /= we;
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}
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#endregion
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BLEND_OVERRIDE
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surface_set_target(hori);
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draw_clear_alpha(bg_c, bg);
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shader_set(sh_blur_gaussian);
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shader_set_uniform_f_array(uni_dim, [ surface_get_width(surface), surface_get_height(surface) ]);
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shader_set_uniform_f_array(uni_wei, gau_array);
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shader_set_uniform_i(uni_bor, sampleMode);
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shader_set_uniform_i(uni_sze, size);
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shader_set_uniform_i(uni_hor, 1);
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shader_set_uniform_i(uni_ovr, overColor != noone);
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shader_set_uniform_f_array(uni_ovc, colToVec4(overColor));
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draw_surface_safe(surface, 0, 0);
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shader_reset();
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surface_reset_target();
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surface_set_target(vert);
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draw_clear_alpha(bg_c, bg);
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shader_set(sh_blur_gaussian);
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shader_set_uniform_i(uni_hor, 0);
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draw_surface_safe(hori, 0, 0);
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shader_reset();
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surface_reset_target();
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BLEND_NORMAL
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surface_free(hori);
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return vert;
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} |