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Drawing text working using Framebuffer.blit_alpha_bitmap()

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This commit is contained in:
Josh Holtrop 2022-03-22 20:01:08 -04:00
parent 7562be585f
commit 2d7bf5197f
3 changed files with 17 additions and 7 deletions
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2
Rsconscript
View File

@ -15,7 +15,7 @@ configure do
end
# Kernel default font size.
KFONT_SIZE = 15
KFONT_SIZE = 18
class HulkBinObj < Builder
def run(options)

12
src/fontgen/fontgen.c
View File

@ -93,28 +93,28 @@ static void generate(const char * d_file_name)
fprintf(fh, "struct CharInfo {\n");
fprintf(fh, " uint width;\n");
fprintf(fh, " uint height;\n");
fprintf(fh, " uint top;\n");
fprintf(fh, " uint left;\n");
fprintf(fh, " int top;\n");
fprintf(fh, " int left;\n");
fprintf(fh, " const ubyte[] bitmap;\n");
fprintf(fh, "};\n");
fprintf(fh, "struct FontInfo {\n");
fprintf(fh, " uint line_height;\n");
fprintf(fh, " uint advance;\n");
fprintf(fh, " uint baseline_offset;\n");
fprintf(fh, " int baseline_offset;\n");
fprintf(fh, " const CharInfo[] chars;\n");
fprintf(fh, "};\n");
fprintf(fh, "__gshared const FontInfo kfont = {\n");
fprintf(fh, " %du,\n", line_height);
fprintf(fh, " %du,\n", max_advance);
fprintf(fh, " %du,\n", baseline_offset);
fprintf(fh, " %d,\n", baseline_offset);
fprintf(fh, " [\n");
for (int i = 0; i < N_CHARS; i++)
{
fprintf(fh, " CharInfo(\n");
fprintf(fh, " %du,\n", char_infos[i].width);
fprintf(fh, " %du,\n", char_infos[i].height);
fprintf(fh, " %du,\n", char_infos[i].top);
fprintf(fh, " %du,\n", char_infos[i].left);
fprintf(fh, " %d,\n", char_infos[i].top);
fprintf(fh, " %d,\n", char_infos[i].left);
if (char_infos[i].width > 0)
{
fprintf(fh, " [\n");

10
src/hulk/hulk.d
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@ -8,6 +8,7 @@ import hulk.bootinfo;
import hulk.framebuffer;
import hos.memory;
import ldc.attributes;
import hulk.kfont;
private __gshared Framebuffer fb;
@ -34,6 +35,15 @@ extern(C) void hulk_start(ulong rdi, ulong rsi, ulong rdx, BootInfo * bootinfo)
memset32(&bootinfo.fb.buffer[y * bootinfo.fb.stride + 20u], 0x001199u, 20u);
}
string message = "Hello, world! 0123456789!@#$%^&*()_-=+[]{};:\"'<>,./";
int x = 100u;
foreach (ch; message)
{
const(CharInfo) * ci = &kfont.chars[ch];
fb.blit_alpha_bitmap(x + ci.left, 100 + ci.top - ci.height, ci.bitmap, ci.width, ci.height, 0x0088CCu);
x += kfont.advance;
}
for (;;)
{
}