1#ifndef ALBA_H
  2#define ALBA_H
  3
  4#include "GLFW/glfw3.h"
  5#include "webgpu.h"
  6#include "ft2build.h"
  7#include FT_FREETYPE_H
  8
  9// Dynamic arrays
 10typedef struct
 11{
 12    uint64_t element_size;
 13    uint64_t length;
 14    uint64_t capacity;
 15    void* data;
 16} DynArray;
 17
 18DynArray dynarray_new(uint64_t element_size, uint64_t capacity);
 19void dynarray_reserve(DynArray* array, uint64_t request);
 20void dynarray_append(DynArray* array, const void* value);
 21void dynarray_extend(DynArray* array, uint64_t size, const void* data);
 22void dynarray_release(const DynArray* array);
 23void dynarray_clear(DynArray* array);
 24void dynarray_sort(const DynArray* array, uint32_t (*smaller_than_pivot)(void* pivot, void* elem));
 25
 26// Misc
 27typedef struct
 28{
 29    float r;
 30    float g;
 31    float b;
 32    float a;
 33} AlbaColor;
 34
 35// Window
 36typedef struct
 37{
 38    char* title;
 39    uint32_t initial_width;
 40    uint32_t initial_height;
 41    AlbaColor clear_color;
 42} AlbaWindowOptions;
 43
 44typedef struct
 45{
 46    // if set, the next frame will update the buffers
 47    int dirty;
 48    DynArray new_vertices;
 49    WGPUBuffer vertices;
 50    DynArray new_attributes;
 51    WGPUBuffer attributes;
 52    DynArray new_indices;
 53    WGPUBuffer indices;
 54    WGPUBuffer uniforms;
 55} RenderPassData;
 56
 57typedef struct
 58{
 59    AlbaWindowOptions options;
 60    GLFWwindow* glfw_window;
 61    uint32_t width, height;
 62    WGPUInstance instance;
 63    WGPUSurface surface;
 64    WGPUAdapter adapter;
 65    WGPUDevice device;
 66    WGPUQueue queue;
 67    WGPUShaderModule shaders;
 68    WGPURenderPipeline pipeline;
 69    WGPUBindGroup bind_group;
 70    RenderPassData drawing;
 71    RenderPassData text;
 72} AlbaWindow;
 73
 74AlbaWindow* create_window(const AlbaWindowOptions* options);
 75uint32_t window_should_close(const AlbaWindow* window);
 76// Returns window size, in scaled coordinates (e.g. will honor
 77// the windowing system scaling). The point at this coordinate
 78// is at the bottom right of the window.
 79void window_get_size(const AlbaWindow* window, float* width, float* height);
 80void window_render(AlbaWindow* window);
 81void window_release(AlbaWindow* window);
 82
 83void alba_release();
 84
 85// Low level drawing
 86void draw_triangles_indexed(
 87    AlbaWindow* window,
 88    uint32_t num_vertices,
 89    const float* vertices,
 90    const float* attributes,
 91    uint32_t num_indices,
 92    uint32_t* indices
 93);
 94void draw_triangles(
 95    AlbaWindow* window,
 96    uint32_t num_vertices,
 97    const float* vertices,
 98    const float* attributes
 99);
100
101// Higher level drawing
102void draw_triangle(AlbaWindow* window, const float vertices[6], AlbaColor color);
103void draw_quad(AlbaWindow* window, const float vertices[8], AlbaColor color);
104void draw_rect_aa(AlbaWindow* window, float x0, float y0, float x1, float y1, AlbaColor color);
105
106void generate_regular_polygon(DynArray* array, uint32_t num_sides, float x, float y, float r);
107void generate_circle(DynArray* array, float x, float y, float r);
108void generate_rounded_rect_aa(DynArray* array, float x0, float y0, float x1, float y1, float r);
109
110void draw_concave_polygon(AlbaWindow* window, float x, float y, DynArray* contour, AlbaColor color);
111void draw_regular_polygon(AlbaWindow* window, uint32_t num_sides, float x, float y, float r, AlbaColor color);
112void draw_circle(AlbaWindow* window, float x, float y, float r, AlbaColor color);
113void draw_quad(AlbaWindow* window, const float vertices[8], AlbaColor color);
114void draw_rounded_rect_aa(AlbaWindow* window, float x0, float y0, float x1, float y1, float r, AlbaColor color);
115
116void draw_text(AlbaWindow* window, const float x, const float y, uint64_t length, const char* text);
117
118#endif // ALBA_H