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Genesis-Plus-GX/source/gx/gx_video.c

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/****************************************************************************
* gx_video.c
*
* Genesis Plus GX video & rendering support
*
* Copyright Eke-Eke (2007-2011), based on original work from Softdev (2006)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:
*
* - Redistributions may not be sold, nor may they be used in a commercial
* product or activity.
*
* - Redistributions that are modified from the original source must include the
* complete source code, including the source code for all components used by a
* binary built from the modified sources. However, as a special exception, the
* source code distributed need not include anything that is normally distributed
* (in either source or binary form) with the major components (compiler, kernel,
* and so on) of the operating system on which the executable runs, unless that
* component itself accompanies the executable.
*
* - Redistributions must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************************/
#include "shared.h"
#include "font.h"
#include "md_ntsc.h"
#include "sms_ntsc.h"
#include "gx_input.h"
#include <png.h>
#define TEX_WIDTH 720
#define TEX_HEIGHT 576
#define TEX_SIZE (TEX_WIDTH * TEX_HEIGHT * 2)
#define DEFAULT_FIFO_SIZE 256 * 1024
#define HASPECT 320
#define VASPECT 240
/* libpng wrapper */
typedef struct
{
u8 *buffer;
u32 offset;
} png_image;
extern const u8 Crosshair_p1_png[];
extern const u8 Crosshair_p2_png[];
/*** VI ***/
GXRModeObj *vmode; /* Default Video Mode */
u8 *texturemem; /* Texture Data */
u8 *screenshot; /* Texture Data */
/*** 50/60hz flag ***/
u32 gc_pal;
/*** NTSC Filters ***/
sms_ntsc_t *sms_ntsc;
md_ntsc_t *md_ntsc;
/*** GX FIFO ***/
static u8 gp_fifo[DEFAULT_FIFO_SIZE] ATTRIBUTE_ALIGN (32);
/*** GX Textures ***/
static u32 vwidth,vheight;
static gx_texture *crosshair[2];
/*** Framebuffers ***/
static u32 *xfb[2];
static u32 whichfb = 0;
/***************************************************************************************/
/* Emulation video modes */
/***************************************************************************************/
static GXRModeObj *rmode;
/* 288 lines progressive (PAL 50Hz) */
static GXRModeObj TV50hz_288p =
{
VI_TVMODE_PAL_DS, // viDisplayMode
640, // fbWidth
286, // efbHeight
286, // xfbHeight
0, // viXOrigin
(VI_MAX_HEIGHT_PAL - 572)/2, // viYOrigin
VI_MAX_WIDTH_PAL, // viWidth
572, // 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
}
};
/* 288 lines interlaced (PAL 50Hz) */
static GXRModeObj TV50hz_288i =
{
VI_TVMODE_PAL_INT, // viDisplayMode
640, // fbWidth
286, // efbHeight
286, // xfbHeight
0, // viXOrigin
(VI_MAX_HEIGHT_PAL - 572)/2, // viYOrigin
VI_MAX_WIDTH_PAL, // viWidth
572, // viHeight
VI_XFBMODE_SF, // xFBmode
GX_TRUE, // 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
}
};
/* 576 lines interlaced (PAL 50Hz, scaled) */
static GXRModeObj TV50hz_576i =
{
VI_TVMODE_PAL_INT, // viDisplayMode
640, // fbWidth
480, // efbHeight
VI_MAX_HEIGHT_PAL, // xfbHeight
0, // viXOrigin
0, // viYOrigin
VI_MAX_WIDTH_PAL, // viWidth
VI_MAX_HEIGHT_PAL, // 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
}
};
/* 240 lines progressive (NTSC or PAL 60Hz) */
static GXRModeObj TV60hz_240p =
{
VI_TVMODE_EURGB60_DS, // viDisplayMode
640, // fbWidth
VI_MAX_HEIGHT_NTSC/2, // efbHeight
VI_MAX_HEIGHT_NTSC/2, // xfbHeight
0, // viXOrigin
0, // viYOrigin
VI_MAX_WIDTH_NTSC, // viWidth
VI_MAX_HEIGHT_NTSC, // 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
}
};
/* 240 lines interlaced (NTSC or PAL 60Hz) */
static GXRModeObj TV60hz_240i =
{
VI_TVMODE_EURGB60_INT, // viDisplayMode
640, // fbWidth
VI_MAX_HEIGHT_NTSC/2, // efbHeight
VI_MAX_HEIGHT_NTSC/2, // xfbHeight
0, // viXOrigin
0, // viYOrigin
VI_MAX_WIDTH_NTSC, // viWidth
VI_MAX_HEIGHT_NTSC, // viHeight
VI_XFBMODE_SF, // xFBmode
GX_TRUE, // field_rendering
GX_FALSE, // aa
// sample points arranged in increasing Y order
{
{3,2},{9,6},{3,10}, // pix 0, 3 sample points, 1/12 units, 4 bits each
{3,2},{9,6},{3,10}, // pix 1
{9,2},{3,6},{9,10}, // pix 2
{9,2},{3,6},{9,10} // 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
}
};
/* 480 lines interlaced (NTSC or PAL 60Hz) */
static GXRModeObj TV60hz_480i =
{
VI_TVMODE_EURGB60_INT,// viDisplayMode
640, // fbWidth
VI_MAX_HEIGHT_NTSC, // efbHeight
VI_MAX_HEIGHT_NTSC, // xfbHeight
0, // viXOrigin
0, // viYOrigin
VI_MAX_WIDTH_NTSC, // viWidth
VI_MAX_HEIGHT_NTSC, // 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 pointer table */
static GXRModeObj *tvmodes[6] =
{
/* 60hz modes */
&TV60hz_240p,
&TV60hz_240i,
&TV60hz_480i,
/* 50Hz modes */
&TV50hz_288p,
&TV50hz_288i,
&TV50hz_576i
};
/***************************************************************************************/
/* GX rendering engine */
/***************************************************************************************/
typedef struct tagcamera
{
guVector pos;
guVector up;
guVector 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.
***/
static 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, -100.0F},
{0.0F, -1.0F, 0.0F},
{0.0F, 0.0F, 0.0F}
};
/* VSYNC callback */
static void vi_callback(u32 cnt)
{
frameticker ++;
}
/* Vertex Rendering */
static inline void draw_vert(u8 pos, f32 s, f32 t)
{
GX_Position1x8(pos);
GX_TexCoord2f32(s, t);
}
/* textured quad rendering */
static inline void draw_square(void)
{
GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
draw_vert(3, 0.0, 0.0);
draw_vert(2, 1.0, 0.0);
draw_vert(1, 1.0, 1.0);
draw_vert(0, 0.0, 1.0);
GX_End();
}
/* Initialize GX */
static void gxStart(void)
{
/*** Clear out FIFO area ***/
memset(&gp_fifo, 0, DEFAULT_FIFO_SIZE);
/*** GX default ***/
GX_Init(&gp_fifo, DEFAULT_FIFO_SIZE);
GX_SetPixelFmt(GX_PF_RGB8_Z24, GX_ZC_LINEAR);
GX_SetCullMode(GX_CULL_NONE);
GX_SetClipMode(GX_CLIP_DISABLE);
GX_SetDispCopyGamma(GX_GM_1_0);
GX_SetZMode(GX_FALSE, GX_ALWAYS, GX_FALSE);
GX_SetColorUpdate(GX_TRUE);
GX_SetAlphaUpdate(GX_FALSE);
/* Modelview */
Mtx view;
memset (&view, 0, sizeof (Mtx));
guLookAt(view, &cam.pos, &cam.up, &cam.view);
GX_LoadPosMtxImm(view, GX_PNMTX0);
GX_Flush();
}
/* Reset GX rendering */
static void gxResetRendering(u8 type)
{
GX_ClearVtxDesc();
if (type)
{
/* uses direct positionning, alpha blending & color channel (menu rendering) */
GX_SetBlendMode(GX_BM_BLEND,GX_BL_SRCALPHA,GX_BL_INVSRCALPHA,GX_LO_CLEAR);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_POS, GX_POS_XY, 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_SetVtxDesc(GX_VA_POS, GX_DIRECT);
GX_SetVtxDesc(GX_VA_TEX0, GX_DIRECT);
GX_SetVtxDesc (GX_VA_CLR0, GX_DIRECT);
/*
Color.out = Color.rasterized*Color.texture
Alpha.out = Alpha.rasterized*Alpha.texture
*/
GX_SetTevOp (GX_TEVSTAGE0, GX_MODULATE);
GX_SetTevOrder(GX_TEVSTAGE0, GX_TEXCOORD0, GX_TEXMAP0, GX_COLOR0A0);
GX_SetNumTexGens(1);
GX_SetNumChans(1);
}
else
{
/* uses array positionning, no alpha blending, no color channel (video emulation) */
GX_SetBlendMode(GX_BM_NONE,GX_BL_SRCALPHA,GX_BL_INVSRCALPHA,GX_LO_CLEAR);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_POS, GX_POS_XYZ, GX_S16, 0);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_TEX0, GX_TEX_ST, GX_F32, 0);
GX_SetVtxDesc(GX_VA_POS, GX_INDEX8);
GX_SetVtxDesc(GX_VA_TEX0, GX_DIRECT);
GX_SetArray(GX_VA_POS, square, 3 * sizeof (s16));
/*
Color.out = Color.texture
Alpha.out = Alpha.texture
*/
GX_SetTevOp (GX_TEVSTAGE0, GX_REPLACE);
GX_SetTevOrder(GX_TEVSTAGE0, GX_TEXCOORD0, GX_TEXMAP0, GX_COLORNULL);
GX_SetNumTexGens(1);
GX_SetNumChans(0);
}
GX_Flush();
}
/* Reset GX rendering mode */
static void gxResetMode(GXRModeObj *tvmode)
{
Mtx44 p;
f32 yScale = GX_GetYScaleFactor(tvmode->efbHeight, tvmode->xfbHeight);
u16 xfbHeight = GX_SetDispCopyYScale(yScale);
u16 xfbWidth = tvmode->fbWidth;
if (xfbWidth & 15) // xfb width is 16 pixels aligned
xfbWidth = (xfbWidth & ~15) + 16;
GX_SetCopyClear((GXColor)BLACK,0x00ffffff);
GX_SetViewport(0.0F, 0.0F, tvmode->fbWidth, tvmode->efbHeight, 0.0F, 1.0F);
GX_SetScissor(0, 0, tvmode->fbWidth, tvmode->efbHeight);
GX_SetDispCopySrc(0, 0, tvmode->fbWidth, tvmode->efbHeight);
GX_SetDispCopyDst(xfbWidth, xfbHeight);
GX_SetCopyFilter(tvmode->aa, tvmode->sample_pattern, (tvmode->xfbMode == VI_XFBMODE_SF) ? GX_FALSE : GX_TRUE, tvmode->vfilter);
GX_SetFieldMode(tvmode->field_rendering, ((tvmode->viHeight == 2 * tvmode->xfbHeight) ? GX_ENABLE : GX_DISABLE));
guOrtho(p, tvmode->efbHeight/2, -(tvmode->efbHeight/2), -(tvmode->fbWidth/2), tvmode->fbWidth/2, 100, 1000);
GX_LoadProjectionMtx(p, GX_ORTHOGRAPHIC);
GX_Flush();
}
/* Manage Aspect Ratio */
static void gxSetAspectRatio(int *xscale, int *yscale)
{
/* original aspect ratio */
/* the following values have been deducted from comparison with a real 50/60hz Mega Drive */
if (config.aspect)
{
/* vertical borders */
if (config.overscan & 1)
{
/* Genesis outputs 288(PAL) or 243(NTSC) lines */
/* Wii & Game Cube output 286/574(PAL50) or 240/480 (PAL60 & NTSC) lines */
*yscale = vdp_pal + ((gc_pal && !config.render) ? 143 : 120);
}
else
{
/* overscan is simulated (black) */
*yscale = vheight / 2;
/* adjust when Genesis & Wii/GC video height does not match */
if (vdp_pal && (!gc_pal || config.render))
{
*yscale = *yscale * 240 / 288;
}
else if (!vdp_pal && gc_pal && !config.render)
{
*yscale = *yscale * 288 / 240;
}
}
/* horizontal borders */
if (config.overscan & 2)
{
/* max visible range is ~712 pixels (= 348 'H40' pixels) */
*xscale = (reg[12] & 1) ? 356 : 363;
}
else
{
/* overscan is simulated (black) */
*xscale = (system_hw == SYSTEM_GG) ? 204 : 327;
}
/* aspect correction for 16:9 screens */
if (config.aspect & 2)
{
*xscale = (*xscale * 3) / 4;
}
}
/* manual aspect ratio (default is full screen & not scaled if possible) */
else
{
/* vertical borders */
if (config.overscan & 1)
{
*yscale = (gc_pal && !config.render) ? (vdp_pal ? (268*144 / bitmap.viewport.h):143) : (vdp_pal ? (224*144 / bitmap.viewport.h):120);
}
else
{
*yscale = (vheight == 192) ? 96 : 112;
if (gc_pal && !config.render)
{
*yscale = (*yscale * 134) / 112;
}
}
/* horizontal borders */
if (config.overscan & 2)
{
*xscale = (reg[12] & 1) ? 348 : 355;
}
else
{
*xscale = 320;
}
/* add user scaling */
*xscale += config.xscale;
*yscale += config.yscale;
}
}
/* Reset GX/VI hardware scaler */
static void gxResetScaler(u32 width)
{
int xscale = 0;
int yscale = 0;
int offset = 0;
/* retrieve screen aspect ratio */
gxSetAspectRatio(&xscale, &yscale);
/* default EFB width */
rmode->fbWidth = 640;
/* no filtering, disable GX horizontal scaling */
if (!config.bilinear && !config.ntsc)
{
if ((width * 2) <= 640)
rmode->fbWidth = width * 2;
else if (width <= 640)
rmode->fbWidth = width;
}
/* configure VI width */
if ((xscale * 2) > rmode->fbWidth)
{
/* max width = 720 pixels */
if (xscale > 360)
{
/* save offset for later */
offset = ((xscale - 360) * rmode->fbWidth) / rmode->viWidth;
/* maximal width */
xscale = 360;
}
/* enable VI upscaling */
rmode->viWidth = xscale * 2;
rmode->viXOrigin = (720 - (xscale * 2)) / 2;
/* default GX horizontal scaling */
xscale = (rmode->fbWidth / 2);
/* handle additional upscaling */
if (offset)
{
/* no filtering, reduce EFB width to increase VI upscaling */
if (!config.bilinear && !config.ntsc)
rmode->fbWidth -= (offset * 2);
/* increase GX horizontal scaling */
else
xscale += offset;
}
}
else
{
/* VI horizontal scaling is disabled */
rmode->viWidth = rmode->fbWidth;
rmode->viXOrigin = (720 - rmode->fbWidth) / 2;
}
/* Adjust screen position */
int xshift = (config.xshift * rmode->fbWidth) / rmode->viWidth;
int yshift = (config.yshift * rmode->efbHeight) / rmode->viHeight;
/* Double Resolution modes (480i/576i/480p) */
if (config.render)
{
yscale = yscale * 2;
}
/* Set GX scaler (Vertex Position matrix) */
square[6] = square[3] = xshift + xscale;
square[0] = square[9] = xshift - xscale;
square[4] = square[1] = yshift + yscale;
square[7] = square[10] = yshift - yscale;
DCFlushRange(square, 32);
GX_InvVtxCache();
}
static void gxDrawCrosshair(gx_texture *texture, int x, int y)
{
if (texture->data)
{
/* load texture object */
GXTexObj texObj;
GX_InitTexObj(&texObj, texture->data, texture->width, texture->height, GX_TF_RGBA8, GX_CLAMP, GX_CLAMP, GX_FALSE);
GX_InitTexObjLOD(&texObj,GX_LINEAR,GX_LIN_MIP_LIN,0.0,10.0,0.0,GX_FALSE,GX_TRUE,GX_ANISO_4);
GX_LoadTexObj(&texObj, GX_TEXMAP0);
GX_InvalidateTexAll();
/* reset GX rendering */
gxResetRendering(1);
/* adjust texture dimensions to XFB->VI scaling */
int w = (texture->width * rmode->fbWidth) / (rmode->viWidth);
int h = (texture->height * rmode->efbHeight) / (rmode->viHeight);
/* adjust texture coordinates to EFB */
int fb_w = square[3] - square[9];
int fb_h = square[4] - square[10];
x = (((x + bitmap.viewport.x) * fb_w) / (bitmap.viewport.w + 2*bitmap.viewport.x)) - w/2 - (fb_w/2);
y = (((y + bitmap.viewport.y) * fb_h) / (bitmap.viewport.h + 2*bitmap.viewport.y)) - h/2 - (fb_h/2);
/* Draw textured quad */
GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
GX_Position2s16(x,y+h);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(0.0, 1.0);
GX_Position2s16(x+w,y+h);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(1.0, 1.0);
GX_Position2s16(x+w,y);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(1.0, 0.0);
GX_Position2s16(x,y);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(0.0, 0.0);
GX_End();
/* restore GX rendering */
gxResetRendering(0);
/* restore texture object */
GXTexObj texobj;
GX_InitTexObj(&texobj, texturemem, vwidth, vheight, GX_TF_RGB565, GX_CLAMP, GX_CLAMP, GX_FALSE);
if (!config.bilinear) GX_InitTexObjLOD(&texobj,GX_NEAR,GX_NEAR_MIP_NEAR,0.0,10.0,0.0,GX_FALSE,GX_FALSE,GX_ANISO_1);
GX_LoadTexObj(&texobj, GX_TEXMAP0);
GX_InvalidateTexAll();
}
}
void gxDrawRectangle(s32 x, s32 y, s32 w, s32 h, u8 alpha, GXColor color)
{
/* GX only use Color channel for rendering */
GX_SetTevOp (GX_TEVSTAGE0, GX_PASSCLR);
GX_SetVtxDesc (GX_VA_TEX0, GX_NONE);
GX_Flush();
/* vertex coordinate */
x -= (vmode->fbWidth/2);
y -= (vmode->efbHeight/2);
/* draw colored quad */
GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
GX_Position2s16(x,y+h);
GX_Color4u8(color.r,color.g,color.b,alpha);
GX_Position2s16(x+w,y+h);
GX_Color4u8(color.r,color.g,color.b,alpha);
GX_Position2s16(x+w,y);
GX_Color4u8(color.r,color.g,color.b,alpha);
GX_Position2s16(x,y);
GX_Color4u8(color.r,color.g,color.b,alpha);
GX_End();
GX_DrawDone();
/* restore GX rendering */
GX_SetVtxDesc(GX_VA_TEX0, GX_DIRECT);
GX_SetTevOp (GX_TEVSTAGE0, GX_MODULATE);
GX_Flush();
}
void gxDrawTexture(gx_texture *texture, s32 x, s32 y, s32 w, s32 h, u8 alpha)
{
if (!texture) return;
if (texture->data)
{
/* load texture object */
GXTexObj texObj;
GX_InitTexObj(&texObj, texture->data, texture->width, texture->height, GX_TF_RGBA8, GX_CLAMP, GX_CLAMP, GX_FALSE);
GX_InitTexObjLOD(&texObj,GX_LINEAR,GX_LIN_MIP_LIN,0.0,10.0,0.0,GX_FALSE,GX_TRUE,GX_ANISO_4); /* does this really change anything ? */
GX_LoadTexObj(&texObj, GX_TEXMAP0);
GX_InvalidateTexAll();
/* vertex coordinate */
x -= (vmode->fbWidth/2);
y -= (vmode->efbHeight/2);
/* draw textured quad */
GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
GX_Position2s16(x,y+h);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(0.0, 1.0);
GX_Position2s16(x+w,y+h);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(1.0, 1.0);
GX_Position2s16(x+w,y);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(1.0, 0.0);
GX_Position2s16(x,y);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(0.0, 0.0);
GX_End();
GX_DrawDone();
}
}
void gxDrawTextureRotate(gx_texture *texture, s32 x, s32 y, s32 w, s32 h, f32 angle, u8 alpha)
{
if (!texture) return;
if (texture->data)
{
/* load texture object */
GXTexObj texObj;
GX_InitTexObj(&texObj, texture->data, texture->width, texture->height, GX_TF_RGBA8, GX_CLAMP, GX_CLAMP, GX_FALSE);
GX_InitTexObjLOD(&texObj,GX_LINEAR,GX_LIN_MIP_LIN,0.0,10.0,0.0,GX_FALSE,GX_TRUE,GX_ANISO_4);
GX_LoadTexObj(&texObj, GX_TEXMAP0);
GX_InvalidateTexAll();
/* vertex coordinate */
x -= (vmode->fbWidth/2);
y -= (vmode->efbHeight/2);
/* Modelview rotation */
Mtx m,mv;
guVector axis = (guVector) {0,0,1};
guLookAt(mv, &cam.pos, &cam.up, &cam.view);
guMtxRotAxisDeg (m, &axis, angle);
guMtxTransApply(m,m, x+w/2,y+h/2,0);
guMtxConcat(mv,m,mv);
GX_LoadPosMtxImm(mv, GX_PNMTX0);
GX_Flush();
/* draw textured quad */
GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
GX_Position2s16(-w/2,-h/2);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(0.0, 0.0);
GX_Position2s16(w/2,-h/2);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(1.0, 0.0);
GX_Position2s16(w/2,h/2);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(1.0, 1.0);
GX_Position2s16(-w/2,h/2);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(0.0, 1.0);
GX_End();
GX_DrawDone();
/* restore default Modelview */
guLookAt(mv, &cam.pos, &cam.up, &cam.view);
GX_LoadPosMtxImm(mv, GX_PNMTX0);
GX_Flush();
}
}
void gxDrawTextureRepeat(gx_texture *texture, s32 x, s32 y, s32 w, s32 h, u8 alpha)
{
if (!texture) return;
if (texture->data)
{
/* load texture object */
GXTexObj texObj;
GX_InitTexObj(&texObj, texture->data, texture->width, texture->height, GX_TF_RGBA8, GX_REPEAT, GX_REPEAT, GX_FALSE);
GX_LoadTexObj(&texObj, GX_TEXMAP0);
GX_InvalidateTexAll();
/* vertex coordinate */
x -= (vmode->fbWidth/2);
y -= (vmode->efbHeight/2);
/* texture coordinates */
f32 s = (f32)w / (f32)texture->width;
f32 t = (f32)h / (f32)texture->height;
/* draw textured quad */
GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
GX_Position2s16(x,y+h);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(0.0, t);
GX_Position2s16(x+w,y+h);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(s, t);
GX_Position2s16(x+w,y);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(s, 0.0);
GX_Position2s16(x,y);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(0.0, 0.0);
GX_End();
GX_DrawDone();
}
}
void gxDrawScreenshot(u8 alpha)
{
if (!rmode) return;
/* get current game screen texture */
GXTexObj texobj;
GX_InitTexObj(&texobj, texturemem, vwidth, vheight, GX_TF_RGB565, GX_CLAMP, GX_CLAMP, GX_FALSE);
GX_LoadTexObj(&texobj, GX_TEXMAP0);
GX_InvalidateTexAll();
/* get current aspect ratio */
int xscale,yscale;
gxSetAspectRatio(&xscale, &yscale);
/* adjust horizontal scaling */
xscale = (xscale * vmode->fbWidth) / vmode->viWidth;
/* adjust screen position */
int xshift = (config.xshift * vmode->fbWidth) / vmode->viWidth;
int yshift = (config.yshift * vmode->efbHeight) / vmode->viHeight;
/* set vertices position & size */
s32 x = xshift - xscale;
s32 y = yshift - (yscale * 2);
s32 w = xscale * 2;
s32 h = yscale * 4;
/* black out surrounding area if necessary (Game Gear without borders) */
if ((w < 640) || (h < 480))
{
gxDrawRectangle(0, 0, 640, 480, 255, (GXColor)BLACK);
}
/* draw textured quad */
GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
GX_Position2s16(x,y+h);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(0.0, 1.0);
GX_Position2s16(x+w,y+h);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(1.0, 1.0);
GX_Position2s16(x+w,y);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(1.0, 0.0);
GX_Position2s16(x,y);
GX_Color4u8(0xff,0xff,0xff,alpha);
GX_TexCoord2f32(0.0, 0.0);
GX_End();
GX_DrawDone();
}
void gxCopyScreenshot(gx_texture *texture)
{
/* retrieve gamescreen texture */
GXTexObj texobj;
GX_InitTexObj(&texobj, texturemem, vwidth, vheight, GX_TF_RGB565, GX_CLAMP, GX_CLAMP, GX_FALSE);
GX_LoadTexObj(&texobj, GX_TEXMAP0);
GX_InvalidateTexAll();
/* scale texture to EFB width */
s32 w = ((bitmap.viewport.w + 2*bitmap.viewport.x) * 640) / bitmap.viewport.w;
s32 h = (bitmap.viewport.h + 2*bitmap.viewport.y) * 2;
s32 x = -w/2;
s32 y = -(240+ 2*bitmap.viewport.y);
/* black out surrounding area if necessary (Game Gear without borders) */
if ((w < 640) || (h < 480))
{
gxDrawRectangle(0, 0, 640, 480, 255, (GXColor)BLACK);
}
/* draw textured quad */
GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
GX_Position2s16(x,y+h);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(0.0, 1.0);
GX_Position2s16(x+w,y+h);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(1.0, 1.0);
GX_Position2s16(x+w,y);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(1.0, 0.0);
GX_Position2s16(x,y);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(0.0, 0.0);
GX_End();
/* copy EFB to texture */
texture->format = GX_TF_RGBA8;
texture->width = 320;
texture->height = bitmap.viewport.h;
texture->data = screenshot;
GX_SetTexCopySrc(0, 0, texture->width * 2, texture->height * 2);
GX_SetTexCopyDst(texture->width, texture->height, texture->format, GX_TRUE);
GX_DrawDone();
GX_CopyTex(texture->data, GX_TRUE);
GX_Flush();
/* wait for copy operation to finish */
/* GX_PixModeSync is only useful if GX_ command follows */
/* we use dummy GX commands to stall CPU execution */
GX_PixModeSync();
GX_LoadTexObj(&texobj, GX_TEXMAP0);
GX_InvalidateTexAll();
GX_Flush();
DCFlushRange(texture->data, texture->width * texture->height * 4);
}
/* Take Screenshot */
void gxSaveScreenshot(char *filename)
{
/* capture screenshot into a texture */
gx_texture texture;
gxCopyScreenshot(&texture);
/* open PNG file */
FILE *f = fopen(filename,"wb");
if (f)
{
/* encode screenshot into PNG file */
gxTextureWritePNG(&texture,f);
fclose(f);
}
}
void gxSetScreen(void)
{
GX_DrawDone();
GX_CopyDisp(xfb[whichfb], GX_FALSE);
GX_Flush();
VIDEO_SetNextFramebuffer (xfb[whichfb]);
VIDEO_Flush ();
VIDEO_WaitVSync ();
gx_input_UpdateMenu();
}
void gxClearScreen(GXColor color)
{
whichfb ^= 1;
GX_SetCopyClear(color,0x00ffffff);
GX_CopyDisp(xfb[whichfb], GX_TRUE);
GX_Flush();
}
/***************************************************************************************/
/* GX Texture <-> LibPNG routines */
/***************************************************************************************/
/* libpng read callback function */
static void png_read_from_mem (png_structp png_ptr, png_bytep data, png_size_t length)
{
png_image *image = (png_image *)png_get_io_ptr(png_ptr);
/* copy data from image buffer */
memcpy (data, image->buffer + image->offset, length);
/* advance in the file */
image->offset += length;
}
/* convert PNG image (from file or data buffer) into RGBA8 texture */
gx_texture *gxTextureOpenPNG(const u8 *png_data, FILE *png_file)
{
int i;
/* create a png read struct */
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
if (!png_ptr) return NULL;
/* create a png info struct */
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_read_struct(&png_ptr,NULL,NULL);
return NULL;
}
if (png_data)
{
/* init PNG image structure */
png_image image;
image.buffer = (u8 *) png_data;
image.offset = 0;
/* set callback for the read function */
png_set_read_fn(png_ptr,(png_voidp *)(&image),png_read_from_mem);
}
else if (png_file)
{
/* check for valid magic number */
png_byte magic[8];
if (fread (magic, 1, 8, png_file) != 8)
{
png_destroy_read_struct(&png_ptr,&info_ptr,NULL);
return NULL;
}
if (png_sig_cmp (magic, 0, 8))
{
png_destroy_read_struct(&png_ptr,&info_ptr,NULL);
return NULL;
}
/* set IO callback for read function */
png_init_io (png_ptr, png_file);
png_set_sig_bytes (png_ptr, 8);
}
else
{
png_destroy_read_struct(&png_ptr,&info_ptr,NULL);
return NULL;
}
/* read png info */
png_read_info(png_ptr,info_ptr);
/* retrieve image information */
u32 width = png_get_image_width(png_ptr,info_ptr);
u32 height = png_get_image_height(png_ptr,info_ptr);
u32 bit_depth = png_get_bit_depth(png_ptr,info_ptr);
u32 color_type = png_get_color_type(png_ptr,info_ptr);
/* ensure PNG file is in the supported format */
if (png_file)
{
/* support for RGBA8 textures ONLY !*/
if ((color_type != PNG_COLOR_TYPE_RGB_ALPHA) || (bit_depth != 8))
{
png_destroy_read_struct(&png_ptr, &info_ptr,NULL);
return NULL;
}
/* 4x4 tiles are required */
if ((width%4) || (height%4))
{
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return NULL;
}
}
/* allocate memory to store raw image data */
u32 stride = width << 2;
u8 *img_data = memalign (32, stride * height);
if (!img_data)
{
png_destroy_read_struct(&png_ptr,&info_ptr,NULL);
return NULL;
}
/* allocate row pointer data */
png_bytep *row_pointers = (png_bytep *)memalign (32, sizeof (png_bytep) * height);
if (!row_pointers)
{
free (img_data);
png_destroy_read_struct(&png_ptr,&info_ptr,NULL);
return NULL;
}
/* store raw image data */
for (i = 0; i < height; i++)
{
row_pointers[i] = img_data + (i * stride);
}
/* decode image */
png_read_image(png_ptr, row_pointers);
/* finish decompression and release memory */
png_read_end(png_ptr, NULL);
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
free(row_pointers);
/* initialize texture */
gx_texture *texture = (gx_texture *)memalign(32, sizeof(gx_texture));
if (!texture)
{
free (img_data);
return NULL;
}
/* initialize texture data */
texture->data = memalign(32, stride * height);
if (!texture->data)
{
free (img_data);
free(texture);
return NULL;
}
memset(texture->data, 0, stride * height);
texture->width = width;
texture->height = height;
texture->format = GX_TF_RGBA8;
/* encode to GX_TF_RGBA8 format (4x4 pixels paired titles) */
u16 *dst_ar = (u16 *)(texture->data);
u16 *dst_gb = (u16 *)(texture->data + 32);
u32 *src1 = (u32 *)(img_data);
u32 *src2 = (u32 *)(img_data + stride);
u32 *src3 = (u32 *)(img_data + 2*stride);
u32 *src4 = (u32 *)(img_data + 3*stride);
u32 pixel,h,w;
for (h=0; h<height; h+=4)
{
for (w=0; w<width; w+=4)
{
/* line N (4 pixels) */
for (i=0; i<4; i++)
{
pixel = *src1++;
*dst_ar++= ((pixel << 8) & 0xff00) | ((pixel >> 24) & 0x00ff);
*dst_gb++= (pixel >> 8) & 0xffff;
}
/* line N + 1 (4 pixels) */
for (i=0; i<4; i++)
{
pixel = *src2++;
*dst_ar++= ((pixel << 8) & 0xff00) | ((pixel >> 24) & 0x00ff);
*dst_gb++= (pixel >> 8) & 0xffff;
}
/* line N + 2 (4 pixels) */
for (i=0; i<4; i++)
{
pixel = *src3++;
*dst_ar++= ((pixel << 8) & 0xff00) | ((pixel >> 24) & 0x00ff);
*dst_gb++= (pixel >> 8) & 0xffff;
}
/* line N + 3 (4 pixels) */
for (i=0; i<4; i++)
{
pixel = *src4++;
*dst_ar++= ((pixel << 8) & 0xff00) | ((pixel >> 24) & 0x00ff);
*dst_gb++= (pixel >> 8) & 0xffff;
}
/* next paired tiles */
dst_ar += 16;
dst_gb += 16;
}
/* next 4 lines */
src1 = src4;
src2 = src1 + width;
src3 = src2 + width;
src4 = src3 + width;
}
/* release memory */
free(img_data);
/* flush texture data from cache */
DCFlushRange(texture->data, height * stride);
return texture;
}
/* Write RGBA8 Texture to PNG file */
void gxTextureWritePNG(gx_texture *texture, FILE *png_file)
{
/* allocate PNG data buffer */
u8 *img_data = (u8 *)memalign(32, texture->width * texture->height * 4);
if(!img_data) return;
/* decode GX_TF_RGBA8 format (4x4 pixels paired titles) */
u16 *ar = (u16 *)(texture->data);
u16 *gb = (u16 *)(texture->data + 32);
u32 *dst1 = (u32 *)(img_data);
u32 *dst2 = dst1 + texture->width;
u32 *dst3 = dst2 + texture->width;
u32 *dst4 = dst3 + texture->width;
u32 i,h,w,pixel;
for (h=0; h<texture->height; h+=4)
{
for (w=0; w<texture->width; w+=4)
{
/* line N (4 pixels) */
for (i=0; i<4; i++)
{
pixel = ((*ar & 0xff) << 24) | (*gb << 8) | ((*ar & 0xff00) >> 8);
*dst1++ = pixel;
ar++;
gb++;
}
/* line N + 1 (4 pixels) */
for (i=0; i<4; i++)
{
pixel = ((*ar & 0xff) << 24) | (*gb << 8) | ((*ar & 0xff00) >> 8);
*dst2++ = pixel;
ar++;
gb++;
}
/* line N + 2 (4 pixels) */
for (i=0; i<4; i++)
{
pixel = ((*ar & 0xff) << 24) | (*gb << 8) | ((*ar & 0xff00) >> 8);
*dst3++ = pixel;
ar++;
gb++;
}
/* line N + 3 (4 pixels) */
for (i=0; i<4; i++)
{
pixel = ((*ar & 0xff) << 24) | (*gb << 8) | ((*ar & 0xff00) >> 8);
*dst4++ = pixel;
ar++;
gb++;
}
/* next paired tiles */
ar += 16;
gb += 16;
}
/* next 4 lines */
dst1 = dst4;
dst2 = dst1 + texture->width;
dst3 = dst2 + texture->width;
dst4 = dst3 + texture->width;
}
/* create a png write struct */
png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if(!png_ptr)
{
free(img_data);
return;
}
/* create a png info struct */
png_infop info_ptr = png_create_info_struct (png_ptr);
if (!info_ptr)
{
free(img_data);
png_destroy_write_struct(&png_ptr, NULL);
return;
}
/* set IO callback for the write function */
png_init_io(png_ptr, png_file);
/* set PNG file properties */
png_set_IHDR(png_ptr, info_ptr, texture->width, texture->height, 8, PNG_COLOR_TYPE_RGB_ALPHA,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
/* allocate row pointer data */
png_bytep *row_pointers = (png_bytep *)memalign (32, sizeof (png_bytep) * texture->height);
if (!row_pointers)
{
free (img_data);
png_destroy_write_struct(&png_ptr, &info_ptr);
return;
}
/* store raw image data */
for (i = 0; i < texture->height; i++)
{
row_pointers[i] = img_data + (i * texture->width * 4);
}
/* configure libpng for image data */
png_set_rows(png_ptr,info_ptr,row_pointers);
/* write data to PNG file */
png_write_png(png_ptr,info_ptr,PNG_TRANSFORM_IDENTITY,NULL);
/* finish compression and release memory */
png_write_end(png_ptr, NULL);
free(row_pointers);
free(img_data);
png_destroy_write_struct(&png_ptr, &info_ptr);
}
void gxTextureClose(gx_texture **p_texture)
{
gx_texture *texture = *p_texture;
if (texture)
{
if (texture->data) free(texture->data);
free(texture);
*p_texture = NULL;
}
}
/***************************************************************************************/
/* VIDEO engine */
/***************************************************************************************/
/* Emulation mode -> Menu mode */
void gx_video_Stop(void)
{
/* unallocate NTSC filters */
if (sms_ntsc) free(sms_ntsc);
if (md_ntsc) free(md_ntsc);
sms_ntsc = NULL;
md_ntsc = NULL;
/* lightgun textures */
gxTextureClose(&crosshair[0]);
gxTextureClose(&crosshair[1]);
/* GX menu rendering */
gxResetRendering(1);
gxResetMode(vmode);
/* display game snapshot */
gxClearScreen((GXColor)BLACK);
gxDrawScreenshot(0xff);
/* default VI settings */
VIDEO_SetPreRetraceCallback(NULL);
#ifdef HW_RVL
VIDEO_SetTrapFilter(1);
VIDEO_SetGamma(VI_GM_1_0);
#endif
/* adjust TV width */
vmode->viWidth = config.screen_w;
vmode->viXOrigin = (VI_MAX_WIDTH_NTSC - vmode->viWidth)/2;
VIDEO_Configure(vmode);
/* wait for VSYNC */
gxSetScreen();
}
/* Menu mode -> Emulation mode */
void gx_video_Start(void)
{
#ifdef HW_RVL
VIDEO_SetTrapFilter(config.trap);
VIDEO_SetGamma((int)(config.gamma * 10.0));
#endif
/* TV mode */
if ((config.tv_mode == 1) || ((config.tv_mode == 2) && vdp_pal))
{
/* 50 Hz */
gc_pal = 1;
}
else
{
/* 60 Hz */
gc_pal = 0;
}
/* VSYNC callbacks */
/* If TV mode matches emulated video mode, frame emulation is synchronized with Video Interrupt */
if (gc_pal == vdp_pal)
{
VIDEO_SetPreRetraceCallback(vi_callback);
VIDEO_Flush();
}
/* set interlaced or progressive video mode */
if (config.render == 2)
{
tvmodes[2]->viTVMode = VI_TVMODE_NTSC_PROG;
tvmodes[2]->xfbMode = VI_XFBMODE_SF;
}
else if (config.render == 1)
{
tvmodes[2]->viTVMode = tvmodes[0]->viTVMode & ~3;
tvmodes[2]->xfbMode = VI_XFBMODE_DF;
}
/* update horizontal border width */
if (system_hw == SYSTEM_GG)
{
bitmap.viewport.x = (config.overscan & 2) ? 14 : -48;
}
else
{
bitmap.viewport.x = (config.overscan & 2) * 7;
}
/* force viewport update */
bitmap.viewport.changed = 3;
/* NTSC filter */
if (config.ntsc)
{
/* allocate filters */
if (!sms_ntsc)
{
sms_ntsc = (sms_ntsc_t *)memalign(32,sizeof(sms_ntsc_t));
}
if (!md_ntsc)
{
md_ntsc = (md_ntsc_t *)memalign(32,sizeof(md_ntsc_t));
}
/* setup filters default configuration */
switch (config.ntsc)
{
case 1:
sms_ntsc_init(sms_ntsc, &sms_ntsc_composite);
md_ntsc_init(md_ntsc, &md_ntsc_composite);
break;
case 2:
sms_ntsc_init(sms_ntsc, &sms_ntsc_svideo);
md_ntsc_init(md_ntsc, &md_ntsc_svideo);
break;
case 3:
sms_ntsc_init(sms_ntsc, &sms_ntsc_rgb);
md_ntsc_init(md_ntsc, &md_ntsc_rgb);
break;
}
}
/* lightgun textures */
int i, player = 0;
for (i=0; i<MAX_DEVICES; i++)
{
/* Check for emulated lightguns */
if (input.dev[i] == DEVICE_LIGHTGUN)
{
/* Check if input device is affected to player */
if (config.input[player].device >= 0)
{
if ((i == 0) || ((i == 4) && (input.system[1] != SYSTEM_LIGHTPHASER)))
{
/* Lightgun #1 */
if (config.gun_cursor[0])
{
crosshair[0] = gxTextureOpenPNG(Crosshair_p1_png,0);
}
}
else
{
/* Lightgun #2 */
if (config.gun_cursor[1])
{
crosshair[1] = gxTextureOpenPNG(Crosshair_p2_png,0);
}
}
}
}
/* Check for any emulated device */
if (input.dev[i] != NO_DEVICE)
{
/* increment player index */
player++;
}
}
/* GX emulation rendering */
gxResetRendering(0);
/* resynchronize emulation with VSYNC */
VIDEO_WaitVSync();
}
/* GX render update */
void gx_video_Update(void)
{
int update = bitmap.viewport.changed & 1;
/* check if display has changed during frame */
if (update)
{
/* update texture size */
vwidth = bitmap.viewport.w + (2 * bitmap.viewport.x);
vheight = bitmap.viewport.h + (2 * bitmap.viewport.y);
/* interlaced mode */
if (config.render && interlaced)
{
vheight = vheight << 1;
}
/* ntsc filter */
if (config.ntsc)
{
vwidth = (reg[12] & 1) ? MD_NTSC_OUT_WIDTH(vwidth) : SMS_NTSC_OUT_WIDTH(vwidth);
}
/* texels size must be multiple of 4 */
vwidth = (vwidth >> 2) << 2;
vheight = (vheight >> 2) << 2;
/* initialize texture object */
GXTexObj texobj;
GX_InitTexObj(&texobj, texturemem, vwidth, vheight, GX_TF_RGB565, GX_CLAMP, GX_CLAMP, GX_FALSE);
/* configure texture filtering */
if (!config.bilinear)
{
GX_InitTexObjLOD(&texobj,GX_NEAR,GX_NEAR_MIP_NEAR,0.0,10.0,0.0,GX_FALSE,GX_FALSE,GX_ANISO_1);
}
/* load texture object */
GX_LoadTexObj(&texobj, GX_TEXMAP0);
/* update rendering mode */
if (config.render)
{
rmode = tvmodes[gc_pal*3 + 2];
}
else
{
rmode = tvmodes[gc_pal*3 + interlaced];
}
/* update aspect ratio */
gxResetScaler(vwidth);
/* update GX rendering mode */
gxResetMode(rmode);
/* update VI mode */
VIDEO_Configure(rmode);
}
/* texture is now directly mapped by the line renderer */
/* force texture cache update */
DCFlushRange(texturemem, TEX_SIZE);
GX_InvalidateTexAll();
/* render textured quad */
draw_square();
/* lightgun # 1 screen mark */
if (crosshair[0])
{
if (input.system[0] == SYSTEM_LIGHTPHASER)
{
gxDrawCrosshair(crosshair[0], input.analog[0][0],input.analog[0][1]);
}
else
{
gxDrawCrosshair(crosshair[0], input.analog[4][0],input.analog[4][1]);
}
}
/* lightgun #2 screen mark */
if (crosshair[1])
{
if (input.system[1] == SYSTEM_LIGHTPHASER)
{
gxDrawCrosshair(crosshair[1], input.analog[4][0],input.analog[4][1]);
}
else
{
gxDrawCrosshair(crosshair[1], input.analog[5][0],input.analog[5][1]);
}
}
/* swap XFB */
whichfb ^= 1;
/* copy EFB to XFB */
GX_DrawDone();
GX_CopyDisp(xfb[whichfb], GX_TRUE);
GX_Flush();
/* XFB is ready to be displayed */
VIDEO_SetNextFramebuffer(xfb[whichfb]);
VIDEO_Flush();
if (update)
{
/* clear update flags */
bitmap.viewport.changed &= ~1;
/* field synchronization */
VIDEO_WaitVSync();
if (rmode->viTVMode & VI_NON_INTERLACE)
{
VIDEO_WaitVSync();
}
else while (VIDEO_GetNextField() != odd_frame)
{
VIDEO_WaitVSync();
}
/* audio & video resynchronization */
audioStarted = 0;
}
}
/* Initialize VIDEO subsystem */
void gx_video_Init(void)
{
/*
* Before doing anything else under libogc,
* Call VIDEO_Init
*/
VIDEO_Init();
/* Get the current VIDEO mode then :
- set menu VIDEO mode (480p, 480i or 576i)
- set emulator rendering TV modes (PAL/MPAL/NTSC/EURGB60)
*/
vmode = VIDEO_GetPreferredMode(NULL);
/* Adjust display settings */
switch (vmode->viTVMode >> 2)
{
case VI_PAL: /* 576 lines (PAL 50Hz) */
TV60hz_240p.viTVMode = VI_TVMODE_EURGB60_DS;
TV60hz_240i.viTVMode = VI_TVMODE_EURGB60_INT;
TV60hz_480i.viTVMode = VI_TVMODE_EURGB60_INT;
config.tv_mode = 1;
/* use harwdare vertical scaling to fill screen */
vmode = &TVPal574IntDfScale;
break;
case VI_NTSC: /* 480 lines (NTSC 60hz) */
TV60hz_240p.viTVMode = VI_TVMODE_NTSC_DS;
TV60hz_240i.viTVMode = VI_TVMODE_NTSC_INT;
TV60hz_480i.viTVMode = VI_TVMODE_NTSC_INT;
config.tv_mode = 0;
#ifndef HW_RVL
/* force 480p on NTSC GameCube if the Component Cable is present */
if (VIDEO_HaveComponentCable()) vmode = &TVNtsc480Prog;
#endif
break;
default: /* 480 lines (PAL 60Hz) */
TV60hz_240p.viTVMode = VI_TVMODE(vmode->viTVMode >> 2, VI_NON_INTERLACE);
TV60hz_240i.viTVMode = VI_TVMODE(vmode->viTVMode >> 2, VI_INTERLACE);
TV60hz_480i.viTVMode = VI_TVMODE(vmode->viTVMode >> 2, VI_INTERLACE);
config.tv_mode = 2;
break;
}
/* Configure VI */
VIDEO_Configure (vmode);
/* Configure the framebuffers (double-buffering) */
xfb[0] = (u32 *) MEM_K0_TO_K1((u32 *) SYS_AllocateFramebuffer(&TV50hz_576i));
xfb[1] = (u32 *) MEM_K0_TO_K1((u32 *) SYS_AllocateFramebuffer(&TV50hz_576i));
/* Define a console */
console_init(xfb[0], 20, 64, 640, 574, 574 * 2);
/* Clear framebuffers to black */
VIDEO_ClearFrameBuffer(vmode, xfb[0], COLOR_BLACK);
VIDEO_ClearFrameBuffer(vmode, xfb[1], COLOR_BLACK);
/* Set the framebuffer to be displayed at next VBlank */
VIDEO_SetNextFramebuffer(xfb[0]);
/* Enable Video Interface */
VIDEO_SetBlack(FALSE);
/* Update VIDEO settings for next VBlank */
VIDEO_Flush();
/* Wait for VBlank */
VIDEO_WaitVSync();
VIDEO_WaitVSync();
/* Initialize GX */
gxStart();
gxResetRendering(1);
gxResetMode(vmode);
/* initialize FONT */
FONT_Init();
/* Initialize textures */
texturemem = memalign(32, TEX_SIZE);
screenshot = memalign(32, HASPECT*VASPECT*4);
}
void gx_video_Shutdown(void)
{
if (texturemem) free(texturemem);
if (screenshot) free(screenshot);
FONT_Shutdown();
VIDEO_ClearFrameBuffer(vmode, xfb[whichfb], COLOR_BLACK);
VIDEO_Flush();
VIDEO_WaitVSync();
}
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