mirror of
https://github.com/dborth/snes9xgx.git
synced 2024-11-01 08:25:18 +01:00
554 lines
14 KiB
C++
554 lines
14 KiB
C++
/****************************************************************************
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* Snes9x 1.50
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*
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* Nintendo Gamecube Video
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*
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* This is a modified renderer from the Genesis Plus Project.
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* Well - you didn't expect me to write another one did ya ? -;)
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*
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* softdev July 2006
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* crunchy2 May 2007
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****************************************************************************/
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#include <gccore.h>
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#include <ogcsys.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <wiiuse/wpad.h>
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#include "snes9x.h"
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#include "memmap.h"
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#include "aram.h"
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#include "snes9xGX.h"
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/*** Snes9x GFX Buffer ***/
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static unsigned char snes9xgfx[1024 * 512 * 2];
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/*** Memory ROM Loading ***/
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extern unsigned long ARAM_ROMSIZE;
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extern unsigned int SMBTimer;
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/*** 2D Video ***/
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unsigned int *xfb[2] = { NULL, NULL }; /*** Double buffered ***/
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int whichfb = 0; /*** Switch ***/
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GXRModeObj *vmode; /*** General video mode ***/
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int screenheight;
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extern u32* backdrop;
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/*** GX ***/
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#define TEX_WIDTH 512
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#define TEX_HEIGHT 512
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#define DEFAULT_FIFO_SIZE 256 * 1024
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unsigned int copynow = GX_FALSE;
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static unsigned char gp_fifo[DEFAULT_FIFO_SIZE] ATTRIBUTE_ALIGN (32);
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static unsigned char texturemem[TEX_WIDTH * (TEX_HEIGHT + 8)] ATTRIBUTE_ALIGN (32);
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GXTexObj texobj;
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static Mtx view;
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int vwidth, vheight, oldvwidth, oldvheight;
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u32 FrameTimer = 0;
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u8 vmode_60hz = 0;
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#define HASPECT 76
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#define VASPECT 54
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/* New texture based scaler */
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typedef struct tagcamera
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{
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Vector pos;
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Vector up;
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Vector view;
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}
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camera;
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/*** Square Matrix
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This structure controls the size of the image on the screen.
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Think of the output as a -80 x 80 by -60 x 60 graph.
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***/
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s16 square[] ATTRIBUTE_ALIGN (32) =
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{
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/*
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* X, Y, Z
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* Values set are for roughly 4:3 aspect
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*/
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-HASPECT, VASPECT, 0, // 0
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HASPECT, VASPECT, 0, // 1
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HASPECT, -VASPECT, 0, // 2
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-HASPECT, -VASPECT, 0, // 3
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};
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static camera cam = { {0.0F, 0.0F, 0.0F},
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{0.0F, 0.5F, 0.0F},
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{0.0F, 0.0F, -0.5F}
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};
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#ifdef VIDEO_THREADING
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/****************************************************************************
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* VideoThreading
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****************************************************************************/
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#define TSTACK 16384
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lwpq_t videoblankqueue;
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lwp_t vbthread;
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static unsigned char vbstack[TSTACK];
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/****************************************************************************
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* vbgetback
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*
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* This callback enables the emulator to keep running while waiting for a
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* vertical blank.
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*
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* Putting LWP to good use :)
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****************************************************************************/
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static void *
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vbgetback (void *arg)
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{
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while (1)
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{
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VIDEO_WaitVSync (); /**< Wait for video vertical blank */
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LWP_SuspendThread (vbthread);
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}
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return NULL;
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}
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/****************************************************************************
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* InitVideoThread
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*
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* libOGC provides a nice wrapper for LWP access.
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* This function sets up a new local queue and attaches the thread to it.
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****************************************************************************/
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void
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InitVideoThread ()
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{
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/*** Initialise a new queue ***/
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LWP_InitQueue (&videoblankqueue);
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/*** Create the thread on this queue ***/
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LWP_CreateThread (&vbthread, vbgetback, NULL, vbstack, TSTACK, 80);
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}
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#endif
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/****************************************************************************
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* copy_to_xfb
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*
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* Stock code to copy the GX buffer to the current display mode.
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* Also increments the frameticker, as it's called for each vb.
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****************************************************************************/
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static void
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copy_to_xfb (u32 arg)
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{
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if (copynow == GX_TRUE)
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{
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GX_SetZMode (GX_TRUE, GX_LEQUAL, GX_TRUE);
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GX_SetColorUpdate (GX_TRUE);
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GX_CopyDisp (xfb[whichfb], GX_TRUE);
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GX_Flush ();
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copynow = GX_FALSE;
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}
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FrameTimer++;
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SMBTimer++;
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}
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/****************************************************************************
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* WIP3 - Scaler Support Functions
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****************************************************************************/
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static void
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draw_init ()
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{
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GX_ClearVtxDesc ();
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GX_SetVtxDesc (GX_VA_POS, GX_INDEX8);
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GX_SetVtxDesc (GX_VA_CLR0, GX_INDEX8);
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GX_SetVtxDesc (GX_VA_TEX0, GX_DIRECT);
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GX_SetVtxAttrFmt (GX_VTXFMT0, GX_VA_POS, GX_POS_XYZ, GX_S16, 0);
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GX_SetVtxAttrFmt (GX_VTXFMT0, GX_VA_CLR0, GX_CLR_RGBA, GX_RGBA8, 0);
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GX_SetVtxAttrFmt (GX_VTXFMT0, GX_VA_TEX0, GX_TEX_ST, GX_F32, 0);
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GX_SetArray (GX_VA_POS, square, 3 * sizeof (s16));
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GX_SetNumTexGens (1);
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GX_SetTexCoordGen (GX_TEXCOORD0, GX_TG_MTX2x4, GX_TG_TEX0, GX_IDENTITY);
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GX_InvalidateTexAll ();
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GX_InitTexObj (&texobj, texturemem, vwidth, vheight, GX_TF_RGB565,
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GX_CLAMP, GX_CLAMP, GX_FALSE);
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}
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static void
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draw_vert (u8 pos, u8 c, f32 s, f32 t)
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{
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GX_Position1x8 (pos);
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GX_Color1x8 (c);
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GX_TexCoord2f32 (s, t);
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}
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static void
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draw_square (Mtx v)
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{
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Mtx m; // model matrix.
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Mtx mv; // modelview matrix.
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/*
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* Use C functions!
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* Calling the faster asm ones cause reboot!
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*/
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guMtxIdentity (m);
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guMtxTransApply (m, m, 0, 0, -100);
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guMtxConcat (v, m, mv);
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GX_LoadPosMtxImm (mv, GX_PNMTX0);
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GX_Begin (GX_QUADS, GX_VTXFMT0, 4);
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draw_vert (0, 0, 0.0, 0.0);
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draw_vert (1, 0, 1.0, 0.0);
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draw_vert (2, 0, 1.0, 1.0);
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draw_vert (3, 0, 0.0, 1.0);
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GX_End ();
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}
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/****************************************************************************
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* StartGX
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*
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* This function initialises the GX.
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* WIP3 - Based on texturetest from libOGC examples.
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****************************************************************************/
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static void
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StartGX ()
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{
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Mtx p;
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GXColor background = { 0, 0, 0, 0xff };
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/*** Clear out FIFO area ***/
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memset (&gp_fifo, 0, DEFAULT_FIFO_SIZE);
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/*** Initialise GX ***/
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GX_Init (&gp_fifo, DEFAULT_FIFO_SIZE);
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GX_SetCopyClear (background, 0x00ffffff);
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GX_SetViewport (0, 0, vmode->fbWidth, vmode->efbHeight, 0, 1);
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GX_SetDispCopyYScale ((f32) vmode->xfbHeight / (f32) vmode->efbHeight);
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GX_SetScissor (0, 0, vmode->fbWidth, vmode->efbHeight);
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GX_SetDispCopySrc (0, 0, vmode->fbWidth, vmode->efbHeight);
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GX_SetDispCopyDst (vmode->fbWidth, vmode->xfbHeight);
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GX_SetCopyFilter (vmode->aa, vmode->sample_pattern, GX_TRUE,
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vmode->vfilter);
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GX_SetFieldMode (vmode->field_rendering,
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((vmode->viHeight ==
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2 * vmode->xfbHeight) ? GX_ENABLE : GX_DISABLE));
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GX_SetPixelFmt (GX_PF_RGB8_Z24, GX_ZC_LINEAR);
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GX_SetCullMode (GX_CULL_NONE);
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GX_CopyDisp (xfb[whichfb], GX_TRUE);
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GX_SetDispCopyGamma (GX_GM_1_0);
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guPerspective (p, 60, 1.33F, 10.0F, 1000.0F);
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GX_LoadProjectionMtx (p, GX_PERSPECTIVE);
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vwidth = 100;
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vheight = 100;
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}
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/****************************************************************************
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* UpdatePads
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*
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* called by postRetraceCallback in InitGCVideo - scans gcpad and wpad
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****************************************************************************/
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void UpdatePadsCB()
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{
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#ifdef HW_RVL
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WPAD_ScanPads();
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#endif
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PAD_ScanPads();
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}
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/****************************************************************************
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* InitGCVideo
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*
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* This function MUST be called at startup.
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****************************************************************************/
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void
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InitGCVideo ()
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{
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/*
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* Before doing anything else under libogc,
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* Call VIDEO_Init
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*/
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int *romptr = (int *) 0x81000000;
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VIDEO_Init ();
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PAD_Init ();
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AUDIO_Init (NULL);
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AR_Init (NULL, 0);
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/* Before going any further, let's copy any attached ROM image ** */
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if (memcmp ((char *) romptr, "SNESROM0", 8) == 0)
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{
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ARAM_ROMSIZE = romptr[2];
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romptr = (int *) 0x81000020;
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ARAMPut ((char *) romptr, (char *) AR_SNESROM, ARAM_ROMSIZE);
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}
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/*
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* Always use NTSC mode - this works on NTSC and PAL, GC and Wii
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vmode = &TVNtsc480IntDf;
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*/
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vmode = VIDEO_GetPreferredMode(NULL);
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switch(vmode->viTVMode)
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{
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case VI_TVMODE_PAL_DS:
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case VI_TVMODE_PAL_INT:
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vmode_60hz = 0;
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break;
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case VI_TVMODE_EURGB60_PROG:
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case VI_TVMODE_EURGB60_DS:
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case VI_TVMODE_NTSC_DS:
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case VI_TVMODE_NTSC_INT:
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case VI_TVMODE_NTSC_PROG:
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case VI_TVMODE_MPAL_INT:
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default:
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vmode_60hz = 1;
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break;
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}
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VIDEO_Configure (vmode);
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screenheight = vmode->xfbHeight;
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/*
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* Allocate the video buffers
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*/
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xfb[0] = (u32 *) MEM_K0_TO_K1 (SYS_AllocateFramebuffer (vmode));
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xfb[1] = (u32 *) MEM_K0_TO_K1 (SYS_AllocateFramebuffer (vmode));
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/*
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* A console is always useful while debugging.
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*/
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console_init (xfb[0], 20, 64, vmode->fbWidth, vmode->xfbHeight, vmode->fbWidth * 2);
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/*
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* Clear framebuffers etc.
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*/
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VIDEO_ClearFrameBuffer (vmode, xfb[0], COLOR_BLACK);
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VIDEO_ClearFrameBuffer (vmode, xfb[1], COLOR_BLACK);
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VIDEO_SetNextFramebuffer (xfb[0]);
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/*
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* Let libogc populate manage the PADs for us
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*/
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//VIDEO_SetPostRetraceCallback ((VIRetraceCallback)PAD_ScanPads);
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VIDEO_SetPostRetraceCallback ((VIRetraceCallback)UpdatePadsCB);
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VIDEO_SetPreRetraceCallback ((VIRetraceCallback)copy_to_xfb);
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VIDEO_SetBlack (FALSE);
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VIDEO_Flush ();
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VIDEO_WaitVSync ();
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if (vmode->viTVMode & VI_NON_INTERLACE)
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VIDEO_WaitVSync ();
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copynow = GX_FALSE;
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StartGX ();
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#ifdef VIDEO_THREADING
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InitVideoThread ();
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#endif
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/*
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* Finally, the video is up and ready for use :)
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*/
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}
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void ReInitGCVideo()
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{
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Mtx p;
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GX_SetViewport (0, 0, vmode->fbWidth, vmode->efbHeight, 0, 1);
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GX_SetDispCopyYScale ((f32) vmode->xfbHeight / (f32) vmode->efbHeight);
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GX_SetScissor (0, 0, vmode->fbWidth, vmode->efbHeight);
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GX_SetDispCopySrc (0, 0, vmode->fbWidth, vmode->efbHeight);
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GX_SetDispCopyDst (vmode->fbWidth, vmode->xfbHeight);
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GX_SetCopyFilter (vmode->aa, vmode->sample_pattern, GCSettings.render ? GX_TRUE : GX_FALSE,
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vmode->vfilter);
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GX_SetFieldMode (vmode->field_rendering,
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((vmode->viHeight ==
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2 * vmode->xfbHeight) ? GX_ENABLE : GX_DISABLE));
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GX_SetPixelFmt (GX_PF_RGB8_Z24, GX_ZC_LINEAR);
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// GX_CopyDisp (xfb[whichfb], GX_TRUE);
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guPerspective (p, 60, 1.33F, 10.0F, 1000.0F);
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GX_LoadProjectionMtx (p, GX_PERSPECTIVE);
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}
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/****************************************************************************
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* Drawing screen
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****************************************************************************/
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void
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clearscreen (int colour)
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{
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whichfb ^= 1;
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VIDEO_ClearFrameBuffer (vmode, xfb[whichfb], colour);
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#ifdef HW_RVL
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// on wii copy from memory
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memcpy ((char *) xfb[whichfb], (char *) backdrop, 640 * screenheight * 2);
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#else
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// on gc copy from aram
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ARAMFetch ((char *) xfb[whichfb], (char *) AR_BACKDROP, 640 * screenheight * 2); // FIX
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#endif
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}
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void
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showscreen ()
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{
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copynow = GX_FALSE;
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VIDEO_SetNextFramebuffer (xfb[whichfb]);
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VIDEO_Flush ();
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VIDEO_WaitVSync ();
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}
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/****************************************************************************
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* setGFX
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*
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* Setup the global GFX information for Snes9x
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****************************************************************************/
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void
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setGFX ()
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{
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GFX.Screen = (unsigned short *) snes9xgfx;
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GFX.Pitch = 1024;
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}
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/****************************************************************************
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* MakeTexture
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*
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* Proper GNU Asm rendition of the above, converted by shagkur. - Thanks!
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****************************************************************************/
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void
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MakeTexture (const void *src, void *dst, s32 width, s32 height)
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{
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register u32 tmp0 = 0, tmp1 = 0, tmp2 = 0, tmp3 = 0;
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__asm__ __volatile__ (" srwi %6,%6,2\n"
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" srwi %7,%7,2\n"
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" subi %3,%4,4\n"
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" mr %4,%3\n"
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" subi %4,%4,4\n"
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"2: mtctr %6\n"
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" mr %0,%5\n"
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//
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"1: lwz %1,0(%5)\n"
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" stwu %1,8(%4)\n"
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" lwz %2,4(%5)\n"
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" stwu %2,8(%3)\n"
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" lwz %1,1024(%5)\n"
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" stwu %1,8(%4)\n"
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" lwz %2,1028(%5)\n"
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" stwu %2,8(%3)\n"
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" lwz %1,2048(%5)\n"
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" stwu %1,8(%4)\n"
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" lwz %2,2052(%5)\n"
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" stwu %2,8(%3)\n"
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" lwz %1,3072(%5)\n"
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" stwu %1,8(%4)\n"
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" lwz %2,3076(%5)\n"
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" stwu %2,8(%3)\n"
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" addi %5,%5,8\n"
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" bdnz 1b\n"
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" addi %5,%0,4096\n"
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" subic. %7,%7,1\n"
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" bne 2b"
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// 0 1 2 3 4 5 6 7
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:"=&r" (tmp0), "=&r" (tmp1), "=&r" (tmp2),
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"=&r" (tmp3), "+r" (dst):"r" (src), "r" (width),
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"r" (height));
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}
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/****************************************************************************
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* Update Video
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****************************************************************************/
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void
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update_video (int width, int height)
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{
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vwidth = width;
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vheight = height;
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#ifdef VIDEO_THREADING
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/* Ensure previous vb has complete */
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while ((LWP_ThreadIsSuspended (vbthread) == 0) || (copynow == GX_TRUE))
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#else
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while (copynow == GX_TRUE)
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#endif
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{
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usleep (50);
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}
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whichfb ^= 1;
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if ((oldvheight != vheight) || (oldvwidth != vwidth))
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{
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/** Update scaling **/
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oldvwidth = vwidth;
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oldvheight = vheight;
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draw_init ();
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memset (&view, 0, sizeof (Mtx));
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guLookAt(view, &cam.pos, &cam.up, &cam.view);
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GX_SetViewport (0, 0, vmode->fbWidth, vmode->efbHeight, 0, 1);
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}
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GX_InvVtxCache ();
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GX_InvalidateTexAll ();
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GX_SetTevOp (GX_TEVSTAGE0, GX_DECAL);
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GX_SetTevOrder (GX_TEVSTAGE0, GX_TEXCOORD0, GX_TEXMAP0, GX_COLOR0A0);
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MakeTexture ((char *) GFX.Screen, (char *) texturemem, vwidth, vheight);
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|
|
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|
DCFlushRange (texturemem, TEX_WIDTH * TEX_HEIGHT * 2);
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|
|
|
GX_SetNumChans (1);
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|
|
|
GX_LoadTexObj (&texobj, GX_TEXMAP0);
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|
|
|
draw_square (view);
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|
|
|
GX_DrawDone ();
|
|
VIDEO_SetNextFramebuffer (xfb[whichfb]);
|
|
VIDEO_Flush ();
|
|
copynow = GX_TRUE;
|
|
|
|
#ifdef VIDEO_THREADING
|
|
/* Return to caller, don't waste time waiting for vb */
|
|
LWP_ResumeThread (vbthread);
|
|
#endif
|
|
|
|
}
|
|
|
|
void
|
|
zoom (float speed)
|
|
{
|
|
Vector v;
|
|
|
|
v.x = cam.view.x - cam.pos.x;
|
|
v.y = cam.view.y - cam.pos.y;
|
|
v.z = cam.view.z - cam.pos.z;
|
|
|
|
cam.pos.x += v.x * speed;
|
|
cam.pos.z += v.z * speed;
|
|
cam.view.x += v.x * speed;
|
|
cam.view.z += v.z * speed;
|
|
|
|
oldvheight = 0;
|
|
}
|