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author hop311 <hop3114@gmail.com>2023-11-08 23:24:21 +0100
committer hop311 <hop3114@gmail.com>2023-11-16 00:24:28 +0100
commitbc0b3c61ae0b742da304cada451fba1df72bb0ad (patch)
tree047968e7ea8189ad8391dcabbd09fee1d8cdc30c /extension/src/openvic-extension/utility/Utilities.cpp
parent72d893d55d26ae9dc6739a853d1773b3cb286123 (diff)
GUI elements -> Godot UI nodes generator
Diffstat (limited to 'extension/src/openvic-extension/utility/Utilities.cpp')
-rw-r--r--extension/src/openvic-extension/utility/Utilities.cpp167
1 files changed, 167 insertions, 0 deletions
diff --git a/extension/src/openvic-extension/utility/Utilities.cpp b/extension/src/openvic-extension/utility/Utilities.cpp
new file mode 100644
index 0000000..5940373
--- /dev/null
+++ b/extension/src/openvic-extension/utility/Utilities.cpp
@@ -0,0 +1,167 @@
+#include "Utilities.hpp"
+
+#include <numbers>
+
+#include <godot_cpp/classes/file_access.hpp>
+#include <godot_cpp/classes/resource_loader.hpp>
+#include <godot_cpp/variant/utility_functions.hpp>
+
+#include <gli/convert.hpp>
+#include <gli/load_dds.hpp>
+
+using namespace godot;
+using namespace OpenVic;
+
+static Ref<Image> load_dds_image(String const& path) {
+ gli::texture2d texture { gli::load_dds(Utilities::godot_to_std_string(path)) };
+ if (texture.empty()) {
+ UtilityFunctions::push_error("Failed to load DDS file: ", path);
+ return nullptr;
+ }
+
+ static constexpr gli::format expected_format = gli::FORMAT_BGRA8_UNORM_PACK8;
+ const bool needs_bgr_to_rgb = texture.format() == expected_format;
+ if (!needs_bgr_to_rgb) {
+ texture = gli::convert(texture, expected_format);
+ if (texture.empty()) {
+ UtilityFunctions::push_error("Failed to convert DDS file: ", path);
+ return nullptr;
+ }
+ }
+
+ const gli::texture2d::extent_type extent { texture.extent() };
+ const int width = extent.x, height = extent.y, size = width * height * 4;
+
+ /* Only fail if there aren't enough bytes, everything seems to work fine if there are extra bytes and we ignore them */
+ if (size > texture.size()) {
+ UtilityFunctions::push_error(
+ "Texture size ", static_cast<int64_t>(texture.size()), " mismatched with dims-based size ", size, " for ", path
+ );
+ return nullptr;
+ }
+
+ PackedByteArray pixels;
+ pixels.resize(size);
+ /* Index offset used to control whether we are reading */
+ const size_t rb_idx = 2 * needs_bgr_to_rgb;
+ uint8_t const* ptr = static_cast<uint8_t const*>(texture.data());
+ for (size_t i = 0; i < size; i += 4) {
+ pixels[i + 0] = ptr[i + rb_idx];
+ pixels[i + 1] = ptr[i + 1];
+ pixels[i + 2] = ptr[i + 2 - rb_idx];
+ pixels[i + 3] = ptr[i + 3];
+ }
+
+ return Image::create_from_data(width, height, false, Image::FORMAT_RGBA8, pixels);
+}
+
+Ref<Image> Utilities::load_godot_image(String const& path) {
+ if (path.ends_with(".dds")) {
+ return load_dds_image(path);
+ }
+ return Image::load_from_file(path);
+}
+
+Ref<FontFile> Utilities::load_godot_font(String const& fnt_path, Ref<Image> const& image) {
+ Ref<FontFile> font;
+ font.instantiate();
+ const Error err = font->load_bitmap_font(fnt_path);
+ font->set_texture_image(0, { font->get_fixed_size(), 0 }, 0, image);
+ if (err != OK) {
+ UtilityFunctions::push_error("Failed to load font (error ", err, "): ", fnt_path);
+ }
+ return font;
+}
+
+// Get the polar coordinates of a pixel relative to the center
+static Vector2 getPolar(Vector2 UVin, Vector2 center) {
+ Vector2 relcoord = (UVin - center);
+ float dist = relcoord.length();
+ float theta = std::numbers::pi / 2 + atan2(relcoord.y, relcoord.x);
+ if (theta < 0.0f) {
+ theta += std::numbers::pi * 2;
+ }
+ return { dist, theta };
+}
+
+// From thebookofshaders, returns a gradient falloff
+static inline float parabola(float base, float x, float k) {
+ return powf(base * x * (1.0 - x), k);
+}
+
+static inline float parabola_shadow(float base, float x) {
+ return base * x * x;
+}
+
+static Color pie_chart_fragment(
+ Vector2 UV, float radius, Array const& stopAngles, Array const& colours, Vector2 shadow_displacement,
+ float shadow_tightness, float shadow_radius, float shadow_thickness, Color trim_colour, float trim_size,
+ float gradient_falloff, float gradient_base, bool donut, bool donut_inner_trim, float donut_inner_radius
+) {
+
+ Vector2 coords = getPolar(UV, { 0.5, 0.5 });
+ float dist = coords.x;
+ float theta = coords.y;
+
+ Vector2 shadow_polar = getPolar(UV, shadow_displacement);
+ float shadow_peak = radius + (radius - donut_inner_radius) / 2.0;
+ float shadow_gradient =
+ shadow_thickness + parabola_shadow(shadow_tightness * -10.0, shadow_polar.x + shadow_peak - shadow_radius);
+
+ // Inner hole of the donut => make it transparent
+ if (donut && dist <= donut_inner_radius) {
+ return { 0.1, 0.1, 0.1, shadow_gradient };
+ }
+ // Inner trim
+ else if (donut && donut_inner_trim && dist <= donut_inner_radius + trim_size) {
+ return { trim_colour, 1.0 };
+ }
+ // Interior
+ else if (dist <= radius - trim_size) {
+ Color col { 1.0f, 0.0f, 0.0f };
+ for (int i = 0; i < stopAngles.size(); i++) {
+ if (theta <= float(stopAngles[i])) {
+ col = colours[i];
+ break;
+ }
+ }
+ float gradient = parabola(gradient_base, dist, gradient_falloff);
+ return { col * (1.0 - gradient), 1.0 };
+ }
+ // Outer trim
+ else if (dist <= radius) {
+ return { trim_colour, 1.0 };
+ }
+ // Outside the circle
+ else {
+ return { 0.1, 0.1, 0.1, shadow_gradient };
+ }
+}
+
+void Utilities::draw_pie_chart(
+ Ref<Image> image, Array const& stopAngles, Array const& colours, float radius, Vector2 shadow_displacement,
+ float shadow_tightness, float shadow_radius, float shadow_thickness, Color trim_colour, float trim_size,
+ float gradient_falloff, float gradient_base, bool donut, bool donut_inner_trim, float donut_inner_radius
+) {
+
+ ERR_FAIL_NULL_EDMSG(image, "Cannot draw pie chart to null image.");
+ const int32_t width = image->get_width();
+ const int32_t height = image->get_height();
+ ERR_FAIL_COND_EDMSG(width <= 0 || height <= 0, "Cannot draw pie chart to empty image.");
+ if (width != height) {
+ UtilityFunctions::push_warning("Drawing pie chart to non-square image: ", width, "x", height);
+ }
+ const int32_t size = std::min(width, height);
+ for (int32_t y = 0; y < size; ++y) {
+ for (int32_t x = 0; x < size; ++x) {
+ image->set_pixel(
+ x, y,
+ pie_chart_fragment(
+ Vector2 { static_cast<float>(x), static_cast<float>(y) } / size, radius, stopAngles, colours,
+ shadow_displacement, shadow_tightness, shadow_radius, shadow_thickness, trim_colour, trim_size,
+ gradient_falloff, gradient_base, donut, donut_inner_trim, donut_inner_radius
+ )
+ );
+ }
+ }
+}