Merge pull request #36 from spicyjpeg/dynlink

Dynamic linker, gp-relative addressing, ldscripts and more

1 files changed, 70 insertions, 0 deletions

diff --git a/examples/system/dynlink/display.c b/examples/system/dynlink/display.c
new file mode 100644
index 0000000..d8ad3ed
--- /dev/null
+++ b/examples/system/dynlink/display.c
@@ -0,0 +1,70 @@
+/*
+ * PSn00bSDK dynamic linker example (utilities)
+ * (C) 2021 spicyjpeg - MPL licensed
+ */
+
+#include <psxgpu.h>
+
+#include "library/dll_common.h"
+
+#define SCREEN_XRES 320
+#define SCREEN_YRES 240
+
+/* Display/GPU context utilities */
+
+void init_context(CONTEXT *ctx) {
+	DB *db;
+
+	ResetGraph(0);
+	ctx->xres      = SCREEN_XRES;
+	ctx->yres      = SCREEN_YRES;
+	ctx->db_active = 0;
+
+	db = &(ctx->db[0]);
+	SetDefDispEnv(&(db->disp),           0, 0, SCREEN_XRES, SCREEN_YRES);
+	SetDefDrawEnv(&(db->draw), SCREEN_XRES, 0, SCREEN_XRES, SCREEN_YRES);
+	setRGB0(&(db->draw), 63, 0, 127);
+	db->draw.isbg = 1;
+	db->draw.dtd  = 1;
+
+	db = &(ctx->db[1]);
+	SetDefDispEnv(&(db->disp), SCREEN_XRES, 0, SCREEN_XRES, SCREEN_YRES);
+	SetDefDrawEnv(&(db->draw),           0, 0, SCREEN_XRES, SCREEN_YRES);
+	setRGB0(&(db->draw), 63, 0, 127);
+	db->draw.isbg = 1;
+	db->draw.dtd  = 1;
+
+	// Set up the ordering tables and primitive buffers.
+	db = &(ctx->db[0]);
+	ctx->db_nextpri = db->p;
+	ClearOTagR((u_long *) db->ot, OT_LEN);
+
+	PutDrawEnv(&(db->draw));
+	//PutDispEnv(&(db->disp));
+
+	db = &(ctx->db[1]);
+	ClearOTagR((u_long *) db->ot, OT_LEN);
+
+	// Create a text stream at the top of the screen.
+	FntLoad(960, 0);
+	FntOpen(4, 12, 312, 32, 2, 256);
+}
+
+void display(CONTEXT *ctx) {
+	DB *db;
+
+	DrawSync(0);
+	VSync(0);
+	ctx->db_active ^= 1;
+
+	db = &(ctx->db[ctx->db_active]);
+	ctx->db_nextpri = db->p;
+	ClearOTagR((u_long *) db->ot, OT_LEN);
+
+	PutDrawEnv(&(db->draw));
+	PutDispEnv(&(db->disp));
+	SetDispMask(1);
+
+	db = &(ctx->db[!ctx->db_active]);
+	DrawOTag((u_long *) &(db->ot[OT_LEN - 1]));
+}