Setup project skeleton

1 files changed, 126 insertions, 0 deletions

diff --git a/src/gfx/ps1/include/gfx/port.h b/src/gfx/ps1/include/gfx/port.h
new file mode 100644
index 0000000..faf9a50
--- /dev/null
+++ b/src/gfx/ps1/include/gfx/port.h
@@ -0,0 +1,126 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef GFX_PS1_H
+#define GFX_PS1_H
+
+#include <stdint.h>
+
+union gfx_common
+{
+    struct
+    {
+        uint32_t tpagex :4, tpagey :1, stp :2, bpp :2, dither :1,
+            draw_to_disp :1, disable :1, xflip :1, yflip :1, :10;
+        uint8_t cmd;
+    } f;
+
+    uint32_t mask;
+};
+
+union gfx_sznext
+{
+    struct
+    {
+        uint32_t next :24, sz :8;
+    } f;
+
+    uint32_t cmd_next;
+};
+
+struct gfx_sprite
+{
+    union gfx_sznext sznext;
+    union gfx_common common;
+    uint8_t r, g, b;
+    uint8_t cmd;
+    int16_t x, y;
+    uint8_t u, v;
+    uint16_t clutid;
+    uint16_t w, h;
+};
+
+struct quad
+{
+    union gfx_sznext sznext;
+    uint8_t r, g, b;
+    uint8_t cmd;
+    int16_t x0, y0;
+    uint8_t u0, v0;
+    uint16_t clutid;
+    int16_t x1, y1;
+    uint8_t u1, v1;
+
+    union
+    {
+        struct
+        {
+            /* 0-8 Same as GP0(E1h).Bit0-8. */
+            uint16_t lb :9;
+            uint16_t :2;
+            /* 11 Same as GP0(E1h).Bit11. */
+            uint16_t hb :1;
+            uint16_t :4;
+        } bit;
+
+        uint16_t mask;
+    } tpage;
+
+    int16_t x2, y2;
+    uint8_t u2, v2;
+    uint16_t :16;
+    int16_t x3, y3;
+    uint8_t u3, v3;
+    uint16_t :16;
+};
+
+struct gfx_rect
+{
+    union gfx_sznext sznext;
+    union gfx_common common;
+    uint8_t r, g, b;
+    uint8_t cmd;
+    int16_t x, y;
+    uint16_t w, h;
+};
+
+struct stp_4line
+{
+    union gfx_sznext sznext;
+    union gfx_common common;
+    uint8_t r, g, b;
+    uint8_t cmd;
+    int16_t x, y;
+
+    struct stp_4line_vtx
+    {
+        uint32_t r :8, g :8, b :8, :8;
+        int16_t x, y;
+    } vertices[4];
+
+    uint32_t end;
+};
+
+void gfx_add_to_list(union gfx_sznext *p);
+void *gfx_heap_top(void);
+struct gfx_sprite *gfx_sprite_get(void);
+struct quad *quad_get(void);
+struct gfx_rect *gfx_rect_get(void);
+struct stp_4line *stp_4line_get(void);
+
+#endif