Zack Buhman
30092b9b15
I might later question this decision. I liked how each "hardware" example was roughly one self-contained file. In the "input_keyboard" case, this is no longer true.
42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
#include "vdp1.h"
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#include "font.hpp"
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#include "copy.hpp"
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#include "draw_font.hpp"
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uint32_t pixel_data(const uint32_t top, const uint8_t * glyph_bitmaps, const uint32_t size)
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{
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const uint32_t table_size = (size + 0x20 - 1) & (-0x20);
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const uint32_t table_address = top - table_size;
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uint32_t * table = &vdp1.vram.u32[(table_address / 4)];
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const uint32_t * buf = reinterpret_cast<const uint32_t *>(&glyph_bitmaps[0]);
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copy<uint32_t>(table, buf, size);
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return table_address;
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}
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namespace draw_font {
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uint32_t font_data(void * buf, uint32_t top, state& state)
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{
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uint8_t * data = reinterpret_cast<uint8_t*>(buf);
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font * font = reinterpret_cast<struct font*>(&data[0]);
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glyph * glyphs = reinterpret_cast<struct glyph*>(&data[(sizeof (struct font))]);
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// there are three 32-bit fields before the start of `glyphs`
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const uint8_t * glyph_bitmaps = &data[(sizeof (struct font)) + ((sizeof (struct glyph)) * font->glyph_index)];
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top = pixel_data(top, glyph_bitmaps, font->bitmap_offset);
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state.character_address = top;
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state._font = font;
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state._glyphs = glyphs;
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return top;
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}
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}
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