109 lines
2.1 KiB
C
109 lines
2.1 KiB
C
#include <vhex/display/font.h>
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#include <vhex/display/draw/pixel.h>
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#include <vhex/display/color.h>
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#include <vhex/display/stack.h>
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//---
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// Kernel-level render API
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//---
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/* dfont_char_render() : */
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void dfont_char_render(
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dsurface_t *surface,
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int glyph_idx,
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uint32_t *arg
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) {
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uint32_t glyph_bitmap;
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uint32_t glyph_shift;
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int glyph_width;
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int glyph_size;
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font_t *font;
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int counter;
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int sx;
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int x;
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int y;
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x = arg[0];
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y = arg[1];
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/* generate font index / shift information */
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font = dfont_get();
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if (font->shape.prop == 1) {
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glyph_width = font->glyph.prop[glyph_idx].width;
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glyph_shift = font->glyph.prop[glyph_idx].shift;
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glyph_idx = font->glyph.prop[glyph_idx].index;
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glyph_size = glyph_width * font->glyph.height;
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} else {
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glyph_width = font->glyph.mono.width;
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glyph_size = font->glyph.mono.storage_size;
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glyph_shift = glyph_size * glyph_idx;
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glyph_idx = glyph_shift >> 8;
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glyph_shift = glyph_shift & 0xff;
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}
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/* drawing algo */
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//TODO: cache surface data (limit read/write)
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sx = x;
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counter = 0;
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glyph_shift = 0x80000000 >> glyph_shift;
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glyph_bitmap = font->glyph.data[glyph_idx];
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for (int i = 0; i < glyph_size; ++i)
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{
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if (glyph_bitmap & glyph_shift) {
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dpixel_render(surface, x, y, arg[4]);
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} else {
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dpixel_render(surface, x, y, arg[5]);
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}
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/* update font bitmap index / shift */
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glyph_shift >>= 1;
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if (glyph_shift == 0x00000000) {
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glyph_shift = 0x80000000;
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glyph_bitmap = font->glyph.data[++glyph_idx];
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}
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/* update bitmap position */
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x += 1;
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counter += 1;
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if (counter >= glyph_width) {
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counter = 0;
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x = sx;
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y += 1;
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}
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}
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}
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//---
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// Dstack API
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//---
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/* dfont_char_dstack() : dstack wrapper */
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void dfont_char_dstack(dsurface_t *surface, uint32_t *arg)
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{
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font_t *font = dfont_get();
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uint32_t buff[6] = {
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arg[1], arg[2], 0, 0, arg[3], arg[4]
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};
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dfont_char_render(surface, dfont_glyph_index(font, arg[0]), buff);
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}
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//---
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// User-level API
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//---
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/* dfont_char() : display one char */
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void dfont_char(uint32_t n, int x, int y, int fg, int bg)
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{
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dstack_add_action(
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&DSTACK_CALL(
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&dfont_char_dstack,
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n,
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x, y,
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fg, bg
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),
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NULL,
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NULL
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);
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}
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