1#ifndef INTERNAL_H
 2#define INTERNAL_H
 3
 4#include "alba.h"
 5
 6#include "hashmap.h"
 7
 8#define NO_TEXTURE {-1, -1}
 9
10typedef struct RenderPassDataImpl
11{
12    // if set, the next frame will update the buffers
13    int dirty;
14    AlbaDynArray new_vertices;
15    WGPUBuffer vertices;
16    AlbaDynArray new_attributes;
17    WGPUBuffer attributes;
18    AlbaDynArray new_indices;
19    WGPUBuffer indices;
20    WGPUBuffer uniforms;
21    WGPUTexture texture;
22    WGPURenderPipeline pipeline;
23    WGPUBindGroup bind_group;
24} RenderPassData;
25
26typedef struct AlbaWindowImpl
27{
28    AlbaWindowOptions options;
29    GLFWwindow* glfw_window;
30    AlbaVector size;
31    AlbaVector scale;
32    WGPUInstance instance;
33    WGPUSurface surface;
34    WGPUAdapter adapter;
35    WGPUDevice device;
36    WGPUQueue queue;
37    WGPUShaderModule shaders;
38    RenderPassData drawing;
39    RenderPassData text;
40} AlbaWindow;
41
42// Atlas
43typedef struct
44{
45    uint32_t character;
46    FT_Long glyph_index;
47    FT_Glyph_Metrics metrics;
48    FT_Bitmap bitmap;
49    AlbaVector start;
50    AlbaVector end;
51} AlbaGlyph;
52
53typedef struct
54{
55    struct hashmap* glyphs;
56    int dirty;
57    AlbaDynArray glyph_sizes; // in w, h order
58    AlbaVector size;
59    uint8_t* image;
60} AlbaAtlas;
61
62AlbaAtlas atlas_new(uint32_t capacity);
63void atlas_reserve(AlbaAtlas* atlas, uint32_t capacity);
64void atlas_append(AlbaAtlas* atlas, FT_Face face, uint32_t character);
65void atlas_generate_image(AlbaAtlas* atlas);
66void atlas_release(const AlbaAtlas* atlas);
67
68// Helpers
69WGPUTexture create_texture(
70    const AlbaWindow* window,
71    WGPUTextureUsage usage,
72    AlbaVector size,
73    WGPUTextureFormat format, uint8_t samples,
74    const void* data
75);
76
77// Drawng
78void draw_triangles_indexed_render_pass(
79    RenderPassData* data,
80    uint32_t num_vertices,
81    const AlbaVector* vertices,
82    const AlbaAttribute* attributes,
83    uint32_t num_indices,
84    uint32_t* indices
85);
86
87#endif // INTERNAL_H