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Kernel V3.0.0

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boreddevnl
2026-02-25 22:59:50 +01:00
parent ca997072ce
commit 73a34edd0e
81 changed files with 272886 additions and 13685 deletions
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25
src/kernel/graphics.c
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@@ -283,7 +283,7 @@ void draw_char(int x, int y, char c, uint32_t color) {
if (uc > 127) return;
// Fast rejection: if the character is entirely outside the clipping/dirty rect, skip it
if (g_clip_enabled) {
if (g_clip_enabled && !g_render_target) {
if (x + 8 <= g_clip_x || x >= g_clip_x + g_clip_w ||
y + 8 <= g_clip_y || y >= g_clip_y + g_clip_h) {
return;
@@ -460,3 +460,26 @@ void graphics_set_clipping(int x, int y, int w, int h) {
void graphics_clear_clipping(void) {
g_clip_enabled = false;
}
void graphics_blit_buffer(uint32_t *src, int dst_x, int dst_y, int w, int h) {
if (!g_fb || !src) return;
int sw = get_screen_width();
int sh = get_screen_height();
for (int y = 0; y < h; y++) {
int vy = dst_y + y;
if (vy < 0 || vy >= sh) continue;
for (int x = 0; x < w; x++) {
int vx = dst_x + x;
if (vx < 0 || vx >= sw) continue;
uint32_t pcol = src[y * w + x];
// Alpha blending support:
// If the alpha byte is 0, we treat it as transparent ONLY if the color is also 0.
// This handles common 0xRRGGBB as opaque.
if ((pcol & 0xFF000000) != 0 || (pcol & 0xFFFFFF) != 0) {
g_back_buffer[vy * sw + vx] = pcol;
}
}
}
}