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snes9xgx/source/ngc/video.cpp

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/****************************************************************************
* Snes9x 1.51 Nintendo Wii/Gamecube Port
*
* softdev July 2006
* crunchy2 May 2007
* Michniewski 2008
* Tantric October 2008
*
* video.cpp
*
* Video routines
***************************************************************************/
#include <gccore.h>
#include <ogcsys.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wiiuse/wpad.h>
#include "snes9x.h"
#include "memmap.h"
#include "aram.h"
#include "snes9xGX.h"
#include "gui.h"
/*** Snes9x GFX Buffer ***/
static unsigned char snes9xgfx[1024 * 512 * 2];
/*** 2D Video ***/
unsigned int *xfb[2] = { NULL, NULL }; // Double buffered
int whichfb = 0; // Switch
GXRModeObj *vmode; // Menu video mode
int screenheight;
extern u32* backdrop;
/*** GX ***/
#define TEX_WIDTH 512
#define TEX_HEIGHT 512
#define DEFAULT_FIFO_SIZE 256 * 1024
unsigned int copynow = GX_FALSE;
static unsigned char gp_fifo[DEFAULT_FIFO_SIZE] ATTRIBUTE_ALIGN (32);
static unsigned char texturemem[TEX_WIDTH * (TEX_HEIGHT + 8)] ATTRIBUTE_ALIGN (32);
GXTexObj texobj;
Mtx view;
static int vwidth, vheight, oldvwidth, oldvheight;
static int zoom_xshift = 0;
static int zoom_yshift = 0;
u32 FrameTimer = 0;
u8 vmode_60hz = 0;
bool progressive = 0;
#define HASPECT 320
#define VASPECT 240
/* New texture based scaler */
typedef struct tagcamera
{
Vector pos;
Vector up;
Vector view;
}
camera;
/*** Square Matrix
This structure controls the size of the image on the screen.
Think of the output as a -80 x 80 by -60 x 60 graph.
***/
s16 square[] ATTRIBUTE_ALIGN (32) =
{
/*
* X, Y, Z
* Values set are for roughly 4:3 aspect
*/
-HASPECT, VASPECT, 0, // 0
HASPECT, VASPECT, 0, // 1
HASPECT, -VASPECT, 0, // 2
-HASPECT, -VASPECT, 0 // 3
};
static camera cam = {
{0.0F, 0.0F, 0.0F},
{0.0F, 0.5F, 0.0F},
{0.0F, 0.0F, -0.5F}
};
/***
*** Custom Video modes (used to emulate original console video modes)
***/
/** Original SNES PAL Resolutions: **/
/* 239 lines progressive (PAL 50Hz) */
GXRModeObj TV_239p =
{
VI_TVMODE_PAL_DS, // viDisplayMode
512, // fbWidth
239, // efbHeight
239, // xfbHeight
(VI_MAX_WIDTH_PAL - 640)/2, // viXOrigin
(VI_MAX_HEIGHT_PAL/2 - 478/2)/2, // viYOrigin
640, // viWidth
478, // viHeight
VI_XFBMODE_SF, // xFBmode
GX_FALSE, // field_rendering
GX_FALSE, // aa
// sample points arranged in increasing Y order
{
{6,6},{6,6},{6,6}, // pix 0, 3 sample points, 1/12 units, 4 bits each
{6,6},{6,6},{6,6}, // pix 1
{6,6},{6,6},{6,6}, // pix 2
{6,6},{6,6},{6,6} // pix 3
},
// vertical filter[7], 1/64 units, 6 bits each
{
0, // line n-1
0, // line n-1
21, // line n
22, // line n
21, // line n
0, // line n+1
0 // line n+1
}
};
/* 478 lines interlaced (PAL 50Hz, Deflicker) */
GXRModeObj TV_478i =
{
VI_TVMODE_PAL_INT, // viDisplayMode
512, // fbWidth
478, // efbHeight
478, // xfbHeight
(VI_MAX_WIDTH_PAL - 640)/2, // viXOrigin
(VI_MAX_HEIGHT_PAL - 478)/2, // viYOrigin
640, // viWidth
478, // viHeight
VI_XFBMODE_DF, // xFBmode
GX_FALSE, // field_rendering
GX_FALSE, // aa
// sample points arranged in increasing Y order
{
{6,6},{6,6},{6,6}, // pix 0, 3 sample points, 1/12 units, 4 bits each
{6,6},{6,6},{6,6}, // pix 1
{6,6},{6,6},{6,6}, // pix 2
{6,6},{6,6},{6,6} // pix 3
},
// vertical filter[7], 1/64 units, 6 bits each
{
8, // line n-1
8, // line n-1
10, // line n
12, // line n
10, // line n
8, // line n+1
8 // line n+1
}
};
/** Original SNES NTSC Resolutions: **/
/* 224 lines progressive (NTSC or PAL 60Hz) */
GXRModeObj TV_224p =
{
VI_TVMODE_EURGB60_DS, // viDisplayMode
512, // fbWidth
224, // efbHeight
224, // xfbHeight
(VI_MAX_WIDTH_NTSC - 640)/2, // viXOrigin
(VI_MAX_HEIGHT_NTSC/2 - 448/2)/2, // viYOrigin
640, // viWidth
448, // viHeight
VI_XFBMODE_SF, // xFBmode
GX_FALSE, // field_rendering
GX_FALSE, // aa
// sample points arranged in increasing Y order
{
{6,6},{6,6},{6,6}, // pix 0, 3 sample points, 1/12 units, 4 bits each
{6,6},{6,6},{6,6}, // pix 1
{6,6},{6,6},{6,6}, // pix 2
{6,6},{6,6},{6,6} // pix 3
},
// vertical filter[7], 1/64 units, 6 bits each
{
0, // line n-1
0, // line n-1
21, // line n
22, // line n
21, // line n
0, // line n+1
0 // line n+1
}
};
/* 448 lines interlaced (NTSC or PAL 60Hz, Deflicker) */
GXRModeObj TV_448i =
{
VI_TVMODE_EURGB60_INT, // viDisplayMode
512, // fbWidth
448, // efbHeight
448, // xfbHeight
(VI_MAX_WIDTH_NTSC - 640)/2, // viXOrigin
(VI_MAX_HEIGHT_NTSC - 448)/2, // viYOrigin
640, // viWidth
448, // viHeight
VI_XFBMODE_DF, // xFBmode
GX_FALSE, // field_rendering
GX_FALSE, // aa
// sample points arranged in increasing Y order
{
{6,6},{6,6},{6,6}, // pix 0, 3 sample points, 1/12 units, 4 bits each
{6,6},{6,6},{6,6}, // pix 1
{6,6},{6,6},{6,6}, // pix 2
{6,6},{6,6},{6,6} // pix 3
},
// vertical filter[7], 1/64 units, 6 bits each
{
8, // line n-1
8, // line n-1
10, // line n
12, // line n
10, // line n
8, // line n+1
8 // line n+1
}
};
/* TV Modes table */
GXRModeObj *tvmodes[4] = {
&TV_239p, &TV_478i, /* Snes PAL video modes */
&TV_224p, &TV_448i, /* Snes NTSC video modes */
};
/****************************************************************************
* VideoThreading
***************************************************************************/
#define TSTACK 16384
static lwpq_t videoblankqueue;
static lwp_t vbthread;
static unsigned char vbstack[TSTACK];
/****************************************************************************
* vbgetback
*
* This callback enables the emulator to keep running while waiting for a
* vertical blank.
*
* Putting LWP to good use :)
***************************************************************************/
static void *
vbgetback (void *arg)
{
while (1)
{
VIDEO_WaitVSync (); /**< Wait for video vertical blank */
LWP_SuspendThread (vbthread);
}
return NULL;
}
/****************************************************************************
* InitVideoThread
*
* libOGC provides a nice wrapper for LWP access.
* This function sets up a new local queue and attaches the thread to it.
***************************************************************************/
void
InitVideoThread ()
{
/*** Initialise a new queue ***/
LWP_InitQueue (&videoblankqueue);
/*** Create the thread on this queue ***/
LWP_CreateThread (&vbthread, vbgetback, NULL, vbstack, TSTACK, 150);
}
/****************************************************************************
* copy_to_xfb
*
* Stock code to copy the GX buffer to the current display mode.
* Also increments the frameticker, as it's called for each vb.
***************************************************************************/
static void
copy_to_xfb (u32 arg)
{
if (copynow == GX_TRUE)
{
GX_CopyDisp (xfb[whichfb], GX_TRUE);
GX_Flush ();
copynow = GX_FALSE;
}
FrameTimer++;
}
/****************************************************************************
* Scaler Support Functions
***************************************************************************/
static void
draw_init ()
{
GX_ClearVtxDesc ();
GX_SetVtxDesc (GX_VA_POS, GX_INDEX8);
GX_SetVtxDesc (GX_VA_CLR0, GX_INDEX8);
GX_SetVtxDesc (GX_VA_TEX0, GX_DIRECT);
GX_SetVtxAttrFmt (GX_VTXFMT0, GX_VA_POS, GX_POS_XYZ, GX_S16, 0);
GX_SetVtxAttrFmt (GX_VTXFMT0, GX_VA_CLR0, GX_CLR_RGBA, GX_RGBA8, 0);
GX_SetVtxAttrFmt (GX_VTXFMT0, GX_VA_TEX0, GX_TEX_ST, GX_F32, 0);
GX_SetArray (GX_VA_POS, square, 3 * sizeof (s16));
GX_SetNumTexGens (1);
GX_SetNumChans (0);
GX_SetTexCoordGen (GX_TEXCOORD0, GX_TG_MTX2x4, GX_TG_TEX0, GX_IDENTITY);
GX_SetTevOp (GX_TEVSTAGE0, GX_REPLACE);
GX_SetTevOrder (GX_TEVSTAGE0, GX_TEXCOORD0, GX_TEXMAP0, GX_COLORNULL);
memset (&view, 0, sizeof (Mtx));
guLookAt(view, &cam.pos, &cam.up, &cam.view);
GX_LoadPosMtxImm (view, GX_PNMTX0);
GX_InvVtxCache (); // update vertex cache
}
static void
draw_vert (u8 pos, u8 c, f32 s, f32 t)
{
GX_Position1x8 (pos);
GX_Color1x8 (c);
GX_TexCoord2f32 (s, t);
}
static void
draw_square (Mtx v)
{
Mtx m; // model matrix.
Mtx mv; // modelview matrix.
guMtxIdentity (m);
guMtxTransApply (m, m, 0, 0, -100);
guMtxConcat (v, m, mv);
GX_LoadPosMtxImm (mv, GX_PNMTX0);
GX_Begin (GX_QUADS, GX_VTXFMT0, 4);
draw_vert (0, 0, 0.0, 0.0);
draw_vert (1, 0, 1.0, 0.0);
draw_vert (2, 0, 1.0, 1.0);
draw_vert (3, 0, 0.0, 1.0);
GX_End ();
}
/****************************************************************************
* StartGX
*
* This function initialises the GX.
***************************************************************************/
static void
StartGX ()
{
Mtx p;
GXColor background = { 0, 0, 0, 0xff };
/*** Clear out FIFO area ***/
memset (&gp_fifo, 0, DEFAULT_FIFO_SIZE);
/*** Initialise GX ***/
GX_Init (&gp_fifo, DEFAULT_FIFO_SIZE);
GX_SetCopyClear (background, 0x00ffffff);
GX_SetViewport (0, 0, vmode->fbWidth, vmode->efbHeight, 0, 1);
GX_SetDispCopyYScale ((f32) vmode->xfbHeight / (f32) vmode->efbHeight);
GX_SetScissor (0, 0, vmode->fbWidth, vmode->efbHeight);
GX_SetDispCopySrc (0, 0, vmode->fbWidth, vmode->efbHeight);
GX_SetDispCopyDst (vmode->fbWidth, vmode->xfbHeight);
GX_SetCopyFilter (vmode->aa, vmode->sample_pattern, GX_TRUE, vmode->vfilter);
GX_SetFieldMode (vmode->field_rendering, ((vmode->viHeight == 2 * vmode->xfbHeight) ? GX_ENABLE : GX_DISABLE));
GX_SetPixelFmt (GX_PF_RGB8_Z24, GX_ZC_LINEAR);
GX_SetCullMode (GX_CULL_NONE);
GX_SetDispCopyGamma (GX_GM_1_0);
GX_SetZMode (GX_TRUE, GX_LEQUAL, GX_TRUE);
GX_SetColorUpdate (GX_TRUE);
gui_alphasetup ();
guOrtho(p, vmode->efbHeight/2, -(vmode->efbHeight/2), -(vmode->fbWidth/2), vmode->fbWidth/2, 10, 1000); // matrix, t, b, l, r, n, f
GX_LoadProjectionMtx (p, GX_ORTHOGRAPHIC);
GX_CopyDisp (xfb[whichfb], GX_TRUE); // reset xfb
vwidth = 100;
vheight = 100;
}
/****************************************************************************
* UpdatePadsCB
*
* called by postRetraceCallback in InitGCVideo - scans gcpad and wpad
***************************************************************************/
void
UpdatePadsCB ()
{
#ifdef HW_RVL
WPAD_ScanPads();
#endif
PAD_ScanPads();
}
/****************************************************************************
* InitGCVideo
*
* This function MUST be called at startup.
* - also sets up menu video mode
***************************************************************************/
void
InitGCVideo ()
{
// init video
VIDEO_Init ();
// get default video mode
vmode = VIDEO_GetPreferredMode(NULL);
switch (vmode->viTVMode >> 2)
{
case VI_PAL:
// 576 lines (PAL 50Hz)
// display should be centered vertically (borders)
vmode = &TVPal574IntDfScale;
vmode->xfbHeight = 480;
vmode->viYOrigin = (VI_MAX_HEIGHT_PAL - 480)/2;
vmode->viHeight = 480;
vmode_60hz = 0;
// Original Video modes (forced to PAL 50hz)
// set video signal mode
TV_224p.viTVMode = VI_TVMODE_PAL_DS;
TV_448i.viTVMode = VI_TVMODE_PAL_INT;
// set VI position
TV_224p.viYOrigin = (VI_MAX_HEIGHT_PAL/2 - 448/2)/2;
TV_448i.viYOrigin = (VI_MAX_HEIGHT_PAL - 448)/2;
break;
case VI_NTSC:
// 480 lines (NTSC 60hz)
vmode_60hz = 1;
// Original Video modes (forced to NTSC 60hz)
// set video signal mode
TV_239p.viTVMode = VI_TVMODE_NTSC_DS;
TV_478i.viTVMode = VI_TVMODE_NTSC_INT;
TV_224p.viTVMode = VI_TVMODE_NTSC_DS;
TV_448i.viTVMode = VI_TVMODE_NTSC_INT;
// set VI position
TV_239p.viYOrigin = (VI_MAX_HEIGHT_NTSC/2 - 478/2)/2;
TV_478i.viYOrigin = (VI_MAX_HEIGHT_NTSC - 478)/2;
TV_224p.viYOrigin = (VI_MAX_HEIGHT_NTSC/2 - 448/2)/2;
TV_448i.viYOrigin = (VI_MAX_HEIGHT_NTSC - 448)/2;
break;
default:
// 480 lines (PAL 60Hz)
vmode_60hz = 1;
// Original Video modes (forced to PAL 60hz)
// set video signal mode
TV_239p.viTVMode = VI_TVMODE(vmode->viTVMode >> 2, VI_NON_INTERLACE);
TV_478i.viTVMode = VI_TVMODE(vmode->viTVMode >> 2, VI_INTERLACE);
TV_224p.viTVMode = VI_TVMODE(vmode->viTVMode >> 2, VI_NON_INTERLACE);
TV_448i.viTVMode = VI_TVMODE(vmode->viTVMode >> 2, VI_INTERLACE);
// set VI position
TV_239p.viYOrigin = (VI_MAX_HEIGHT_NTSC/2 - 478/2)/2;
TV_478i.viYOrigin = (VI_MAX_HEIGHT_NTSC - 478)/2;
TV_224p.viYOrigin = (VI_MAX_HEIGHT_NTSC/2 - 448/2)/2;
TV_448i.viYOrigin = (VI_MAX_HEIGHT_NTSC - 448)/2;
break;
}
#ifdef HW_DOL
/* we have component cables, but the preferred mode is interlaced
* why don't we switch into progressive?
* on the Wii, the user can do this themselves on their Wii Settings */
if(VIDEO_HaveComponentCable())
vmode = &TVNtsc480Prog;
#endif
// check for progressive scan
if (vmode->viTVMode == VI_TVMODE_NTSC_PROG)
progressive = true;
#ifdef HW_RVL
// widescreen fix
if(CONF_GetAspectRatio())
{
vmode->viWidth = 678;
vmode->viXOrigin = (VI_MAX_WIDTH_PAL - 678) / 2;
}
#endif
VIDEO_Configure (vmode);
screenheight = vmode->xfbHeight;
// Allocate the video buffers
xfb[0] = (u32 *) MEM_K0_TO_K1 (SYS_AllocateFramebuffer (vmode));
xfb[1] = (u32 *) MEM_K0_TO_K1 (SYS_AllocateFramebuffer (vmode));
// A console is always useful while debugging.
console_init (xfb[0], 20, 64, vmode->fbWidth, vmode->xfbHeight, vmode->fbWidth * 2);
// Clear framebuffers etc.
VIDEO_ClearFrameBuffer (vmode, xfb[0], COLOR_BLACK);
VIDEO_ClearFrameBuffer (vmode, xfb[1], COLOR_BLACK);
VIDEO_SetNextFramebuffer (xfb[0]);
// video callbacks
VIDEO_SetPostRetraceCallback ((VIRetraceCallback)UpdatePadsCB);
VIDEO_SetPreRetraceCallback ((VIRetraceCallback)copy_to_xfb);
VIDEO_SetBlack (FALSE);
VIDEO_Flush ();
VIDEO_WaitVSync ();
if (vmode->viTVMode & VI_NON_INTERLACE)
VIDEO_WaitVSync ();
copynow = GX_FALSE;
StartGX ();
draw_init ();
InitVideoThread ();
// Finally, the video is up and ready for use :)
}
/****************************************************************************
* ResetVideo_Emu
*
* Reset the video/rendering mode for the emulator rendering
****************************************************************************/
void
ResetVideo_Emu ()
{
GXRModeObj *rmode;
Mtx p;
int i = -1;
if (GCSettings.render == 0) // original render mode
{
for (i=0; i<4; i++)
{
if (tvmodes[i]->efbHeight == vheight)
break;
}
rmode = tvmodes[i];
}
else
{
rmode = vmode; // same mode as menu
}
VIDEO_Configure (rmode);
VIDEO_Flush();
VIDEO_WaitVSync();
if (rmode->viTVMode & VI_NON_INTERLACE)
VIDEO_WaitVSync();
else
while (VIDEO_GetNextField())
VIDEO_WaitVSync();
GX_SetViewport (0, 0, rmode->fbWidth, rmode->efbHeight, 0, 1);
GX_SetDispCopyYScale ((f32) rmode->xfbHeight / (f32) rmode->efbHeight);
GX_SetScissor (0, 0, rmode->fbWidth, rmode->efbHeight);
GX_SetDispCopySrc (0, 0, rmode->fbWidth, rmode->efbHeight);
GX_SetDispCopyDst (rmode->fbWidth, rmode->xfbHeight);
GX_SetCopyFilter (rmode->aa, rmode->sample_pattern, (GCSettings.render == 1) ? GX_TRUE : GX_FALSE, rmode->vfilter); // deflicker ON only for filtered mode
GX_SetFieldMode (rmode->field_rendering, ((rmode->viHeight == 2 * rmode->xfbHeight) ? GX_ENABLE : GX_DISABLE));
GX_SetPixelFmt (GX_PF_RGB8_Z24, GX_ZC_LINEAR);
guOrtho(p, rmode->efbHeight/2, -(rmode->efbHeight/2), -(rmode->fbWidth/2), rmode->fbWidth/2, 100, 1000); // matrix, t, b, l, r, n, f
GX_LoadProjectionMtx (p, GX_ORTHOGRAPHIC);
#ifdef _DEBUG_VIDEO
// log stuff
fprintf(debughandle, "\n\nrmode = tvmodes[%d], field_rendering: %d", i, (rmode->viHeight == 2 * rmode->xfbHeight));
fprintf(debughandle, "\nInterlaced: %i,\t vwidth: %d, vheight: %d,\t fb_W: %u, efb_H: %u", IPPU.Interlace, vwidth, vheight, rmode->fbWidth, rmode->efbHeight);
#endif
}
/****************************************************************************
* ResetVideo_Menu
*
* Reset the video/rendering mode for the menu
****************************************************************************/
void
ResetVideo_Menu ()
{
Mtx p;
VIDEO_Configure (vmode);
VIDEO_ClearFrameBuffer (vmode, xfb[whichfb], COLOR_BLACK);
VIDEO_Flush();
VIDEO_WaitVSync();
if (vmode->viTVMode & VI_NON_INTERLACE)
VIDEO_WaitVSync();
else
while (VIDEO_GetNextField())
VIDEO_WaitVSync();
GX_SetViewport (0, 0, vmode->fbWidth, vmode->efbHeight, 0, 1);
GX_SetDispCopyYScale ((f32) vmode->xfbHeight / (f32) vmode->efbHeight);
GX_SetScissor (0, 0, vmode->fbWidth, vmode->efbHeight);
GX_SetDispCopySrc (0, 0, vmode->fbWidth, vmode->efbHeight);
GX_SetDispCopyDst (vmode->fbWidth, vmode->xfbHeight);
GX_SetCopyFilter (vmode->aa, vmode->sample_pattern, GX_TRUE, vmode->vfilter);
GX_SetFieldMode (vmode->field_rendering, ((vmode->viHeight == 2 * vmode->xfbHeight) ? GX_ENABLE : GX_DISABLE));
GX_SetPixelFmt (GX_PF_RGB8_Z24, GX_ZC_LINEAR);
guOrtho(p, vmode->efbHeight/2, -(vmode->efbHeight/2), -(vmode->fbWidth/2), vmode->fbWidth/2, 10, 1000); // matrix, t, b, l, r, n, f
GX_LoadProjectionMtx (p, GX_ORTHOGRAPHIC);
}
/****************************************************************************
* MakeTexture
*
* Proper GNU Asm rendition of the above, converted by shagkur. - Thanks!
***************************************************************************/
static void
MakeTexture (const void *src, void *dst, s32 width, s32 height)
{
register u32 tmp0 = 0, tmp1 = 0, tmp2 = 0, tmp3 = 0;
__asm__ __volatile__ (" srwi %6,%6,2\n"
" srwi %7,%7,2\n"
" subi %3,%4,4\n"
" mr %4,%3\n"
" subi %4,%4,4\n"
"2: mtctr %6\n"
" mr %0,%5\n"
//
"1: lwz %1,0(%5)\n"
" stwu %1,8(%4)\n"
" lwz %2,4(%5)\n"
" stwu %2,8(%3)\n"
" lwz %1,1024(%5)\n"
" stwu %1,8(%4)\n"
" lwz %2,1028(%5)\n"
" stwu %2,8(%3)\n"
" lwz %1,2048(%5)\n"
" stwu %1,8(%4)\n"
" lwz %2,2052(%5)\n"
" stwu %2,8(%3)\n"
" lwz %1,3072(%5)\n"
" stwu %1,8(%4)\n"
" lwz %2,3076(%5)\n"
" stwu %2,8(%3)\n"
" addi %5,%5,8\n"
" bdnz 1b\n"
" addi %5,%0,4096\n"
" subic. %7,%7,1\n"
" bne 2b"
// 0 1 2 3 4 5 6 7
:"=&r" (tmp0), "=&r" (tmp1), "=&r" (tmp2),
"=&r" (tmp3), "+r" (dst):"r" (src), "r" (width),
"r" (height));
}
/****************************************************************************
* Update Video
***************************************************************************/
uint32 prevRenderedFrameCount = 0;
extern bool CheckVideo;
void
update_video (int width, int height)
{
vwidth = width;
vheight = height;
// Ensure previous vb has complete
while ((LWP_ThreadIsSuspended (vbthread) == 0) || (copynow == GX_TRUE))
{
usleep (50);
}
whichfb ^= 1;
if ( oldvheight != vheight || oldvwidth != vwidth ) // if rendered width/height changes, update scaling
CheckVideo = 1;
if ( CheckVideo && (IPPU.RenderedFramesCount != prevRenderedFrameCount) ) // if we get back from the menu, and have rendered at least 1 frame
{
int xscale, yscale;
ResetVideo_Emu (); // reset video to emulator rendering settings
/** Update scaling **/
if (GCSettings.render == 0) // original render mode
{
xscale = 256;
yscale = vheight / 2;
}
else // unfiltered and filtered mode
{
xscale = 320;
yscale = (vheight > (vmode->efbHeight/2)) ? (vheight / 2) : vheight;
}
// aspect ratio scaling (change width scale)
// yes its pretty cheap and ugly, but its easy!
if (GCSettings.widescreen)
xscale = (3*xscale)/4;
xscale *= GCSettings.ZoomLevel;
yscale *= GCSettings.ZoomLevel;
square[6] = square[3] = xscale + GCSettings.xshift;
square[0] = square[9] = -xscale + GCSettings.xshift;
square[4] = square[1] = yscale - GCSettings.yshift;
square[7] = square[10] = -yscale - GCSettings.yshift;
DCFlushRange (square, 32); // update memory BEFORE the GPU accesses it!
draw_init ();
GX_InitTexObj (&texobj, texturemem, vwidth, vheight, GX_TF_RGB565, GX_CLAMP, GX_CLAMP, GX_FALSE); // initialize the texture obj we are going to use
if (GCSettings.render == 0 || GCSettings.render == 2)
GX_InitTexObjLOD(&texobj,GX_NEAR,GX_NEAR_MIP_NEAR,2.5,9.0,0.0,GX_FALSE,GX_FALSE,GX_ANISO_1); // original/unfiltered video mode: force texture filtering OFF
GX_LoadTexObj (&texobj, GX_TEXMAP0); // load texture object so its ready to use
#ifdef _DEBUG_VIDEO
// log stuff
fprintf(debughandle, "\nxscale: %d, yscale: %d", xscale, yscale);
#endif
oldvwidth = vwidth;
oldvheight = vheight;
CheckVideo = 0;
}
MakeTexture ((char *) GFX.Screen, (char *) texturemem, vwidth, vheight); // convert image to texture
DCFlushRange (texturemem, TEX_WIDTH * TEX_HEIGHT * 2); // update the texture memory
GX_InvalidateTexAll ();
draw_square (view); // draw the quad
GX_DrawDone ();
VIDEO_SetNextFramebuffer (xfb[whichfb]);
VIDEO_Flush ();
copynow = GX_TRUE;
// Return to caller, don't waste time waiting for vb
LWP_ResumeThread (vbthread);
}
/****************************************************************************
* Zoom Functions
***************************************************************************/
void
zoom (float speed)
{
if (GCSettings.ZoomLevel > 1)
GCSettings.ZoomLevel += (speed / -100.0);
else
GCSettings.ZoomLevel += (speed / -200.0);
if (GCSettings.ZoomLevel < 0.5)
GCSettings.ZoomLevel = 0.5;
else if (GCSettings.ZoomLevel > 2.0)
GCSettings.ZoomLevel = 2.0;
oldvheight = 0; // update video
}
void
zoom_reset ()
{
GCSettings.ZoomLevel = 1.0;
oldvheight = 0; // update video
}
/****************************************************************************
* Drawing screen
***************************************************************************/
void
clearscreen (int colour)
{
whichfb ^= 1;
VIDEO_ClearFrameBuffer (vmode, xfb[whichfb], colour);
#ifdef HW_RVL
// on wii copy from memory
memcpy ((char *) xfb[whichfb], (char *) backdrop, 640 * screenheight * 2);
#else
// on gc copy from aram
ARAMFetch ((char *) xfb[whichfb], (char *) AR_BACKDROP, 640 * screenheight * 2);
#endif
}
void
showscreen ()
{
copynow = GX_FALSE;
VIDEO_SetNextFramebuffer (xfb[whichfb]);
VIDEO_Flush ();
VIDEO_WaitVSync ();
}
/****************************************************************************
* setGFX
*
* Setup the global GFX information for Snes9x
***************************************************************************/
void
setGFX ()
{
GFX.Screen = (unsigned short *) snes9xgfx;
GFX.Pitch = 1024;
}
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