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#include <vector> |
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|
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struct rc_key_t |
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{ |
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GLenum mode; |
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GLenum format; // 0, GL_T2F_V3F, GL_V2F |
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GLuint texname; |
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unsigned char r, g, b, a; |
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|
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bool operator == (const rc_key_t &o) const |
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{ |
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return mode == o.mode |
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&& format == o.format |
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&& texname == o.texname |
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&& r == o.r |
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&& g == o.g |
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&& b == o.b |
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&& a == o.a; |
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} |
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}; |
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|
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namespace std { |
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template <> |
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struct hash<rc_key_t> |
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{ |
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size_t operator () (const rc_key_t &v) const |
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{ |
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return v.mode + (v.format << 4) + v.texname + (v.r << 8) + (v.g << 16) + (v.b << 24) + v.a; |
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} |
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}; |
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} |
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|
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struct rc_t |
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{ |
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struct glyph_data |
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{ |
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uint8_t u, v, w, h; |
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uint16_t x, y; |
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}; |
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|
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struct array_t |
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: std::vector<uint8_t> |
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{ |
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using std::vector<uint8_t>::vector; |
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|
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template<typename T> |
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T &append () |
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{ |
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auto ofs = size (); |
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resize (ofs + sizeof (T)); |
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return *(T *)(data () + ofs); |
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} |
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|
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void v2f (float x, float y) |
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{ |
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auto &vec = append<float[2]> (); |
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vec[0] = x / 2; |
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vec[1] = y / 2; |
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} |
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|
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void t2f_v3f (float u, float v, float x, float y, float z) |
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{ |
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auto &vec = append<float[5]> (); |
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vec[0] = u; |
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vec[1] = v; |
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vec[2] = x; |
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vec[3] = y; |
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vec[4] = z; |
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} |
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|
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void glyph (int u, int v, int w, int h, int x, int y) |
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{ |
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if (w && h) |
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{ |
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auto &c = append<glyph_data> (); |
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|
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c.u = u; |
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c.v = v; |
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c.w = w; |
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c.h = h; |
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c.x = x + w; |
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c.y = y + h; |
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} |
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} |
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}; |
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|
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int drawcount = 0; |
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ska::flat_hash_map<rc_key_t, array_t> h; |
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|
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void clear () |
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{ |
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drawcount = 0; |
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h.clear (); |
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} |
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|
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array_t &array (const rc_key_t &k) |
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{ |
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return h[k]; |
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} |
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|
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void draw () |
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{ |
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for (auto &&it = h.begin (); it != h.end (); ++it) |
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{ |
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rc_key_t &key = it->first; |
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array_t &arr = it->second; |
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GLsizei stride; |
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|
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if (key.texname) |
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{ |
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glBindTexture (GL_TEXTURE_2D, key.texname); |
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glEnable (GL_TEXTURE_2D); |
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} |
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else |
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glDisable (GL_TEXTURE_2D); |
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|
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glColor4ub (key.r, key.g, key.b, key.a); |
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|
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if (key.format) |
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{ |
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stride = key.format == GL_T2F_V3F ? sizeof (float) * 5 |
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: key.format == GL_V2F ? sizeof (float) * 2 |
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: 65536; |
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|
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glInterleavedArrays (key.format, 0, (void *)arr.data ()); |
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//glLockArraysEXT (0, len / stride); |
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glDrawArrays (key.mode, 0, arr.size () / stride); |
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//glUnlockArraysEXT (); |
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} |
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else |
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{ |
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// optimised character quad storage. slower but nice on memory. |
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// reduces storage requirements from 80 bytes/char to 8 |
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auto *c = (glyph_data *) arr.data (); |
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auto *e = (glyph_data *)(arr.data () + arr.size ()); |
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|
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glBegin (key.mode); // practically must be quads |
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|
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while (c < e) |
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{ |
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glTexCoord2f ( c->u * (1.f / TC_WIDTH), c->v * (1.f / TC_HEIGHT)); glVertex2i (c->x - c->w, c->y - c->h); |
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glTexCoord2f ((c->u + c->w) * (1.f / TC_WIDTH), c->v * (1.f / TC_HEIGHT)); glVertex2i (c->x , c->y - c->h); |
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glTexCoord2f ((c->u + c->w) * (1.f / TC_WIDTH), (c->v + c->h) * (1.f / TC_HEIGHT)); glVertex2i (c->x , c->y ); |
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glTexCoord2f ( c->u * (1.f / TC_WIDTH), (c->v + c->h) * (1.f / TC_HEIGHT)); glVertex2i (c->x - c->w, c->y ); |
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|
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++c; |
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} |
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|
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glEnd (); |
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} |
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} |
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|
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glDisable (GL_TEXTURE_2D); |
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|
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if (ecb_expect_false (++drawcount == 16)) |
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for (auto &&it = h.begin (); it != h.end (); ++it) |
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it->second.shrink_to_fit (); |
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} |
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}; |
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