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[feat] 低质量ttf render

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pyao12
2026-06-06 09:00:56 +08:00
Unverified
parent 3d47667c2f
commit 500d302ea9
15 changed files with 914 additions and 17 deletions
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graphics/context.cpp
+4 -1
View File
@@ -21,7 +21,10 @@ void gfx_init(EFI_GRAPHICS_OUTPUT_PROTOCOL *GOP) {
void gfx_clear(void) {
EFI_GRAPHICS_OUTPUT_BLT_PIXEL black = {0, 0, 0, 0};
g_gfx.GOP->Blt(g_gfx.GOP, &black, EfiBltVideoFill, 0, 0, 0, 0, g_gfx.hr, g_gfx.vr, 0);
uefi_call_wrapper(g_gfx.GOP->Blt, 10,
g_gfx.GOP, &black, EfiBltVideoFill,
(UINTN)0, (UINTN)0, (UINTN)0, (UINTN)0,
(UINTN)g_gfx.hr, (UINTN)g_gfx.vr, (UINTN)0);
}
void draw_set_target(EFI_GRAPHICS_OUTPUT_BLT_PIXEL *buf, SUINT32 w, SUINT32 h) {
graphics/draw.cpp
+18
View File
@@ -34,3 +34,21 @@ void draw_rect(SUINT32 bx, SUINT32 by, SUINT32 ex, SUINT32 ey,
for (SUINT32 y = by; y <= ey; y++)
draw_pixel(x, y, color);
}
void draw_pixel_alpha(SUINT32 x, SUINT32 y, EFI_GRAPHICS_OUTPUT_BLT_PIXEL color, SUINT8 alpha) {
if (x >= g_draw_target.w || y >= g_draw_target.h) return;
if (alpha == 0) return;
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *p = g_draw_target.buf + (g_draw_target.w * y) + x;
if (alpha == 255) {
p->Blue = color.Blue;
p->Green = color.Green;
p->Red = color.Red;
p->Reserved = color.Reserved;
return;
}
SUINT32 inv = 255 - alpha;
p->Blue = (SUINT8)((color.Blue * alpha + p->Blue * inv) / 255);
p->Green = (SUINT8)((color.Green * alpha + p->Green * inv) / 255);
p->Red = (SUINT8)((color.Red * alpha + p->Red * inv) / 255);
p->Reserved = color.Reserved;
}