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Genesis-Plus-GX/gx/gx_video.c

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/****************************************************************************
* gx_video.c
*
* Genesis Plus GX video & rendering support
*
* Copyright Eke-Eke (2007-2014), 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 <ogc/lwp_watchdog.h>
#include <png.h>
/* libpng wrapper */
typedef struct
{
u8 *buffer;
u32 offset;
} png_image;
extern const u8 Crosshair_p1_png[];
extern const u8 Crosshair_p2_png[];
extern const u8 CD_access_off_png[];
extern const u8 CD_access_on_png[];
extern const u8 CD_ready_off_png[];
extern const u8 CD_ready_on_png[];
/*** VI Mode ***/
GXRModeObj *vmode;
/*** 50/60hz flag ***/
u32 gc_pal;
/*** NTSC Filters ***/
sms_ntsc_t *sms_ntsc;
md_ntsc_t *md_ntsc;
/*** GX FIFO ***/
static u8 gp_fifo[GX_FIFO_MINSIZE] ATTRIBUTE_ALIGN(32);
/*** GX Textures ***/
static u32 vwidth, vheight;
static gx_texture *crosshair[2];
static gx_texture *cd_leds[2][2];
/*** Framebuffers ***/
static u32 *xfb;
static u32 drawDone;
/*** Frame Sync ***/
u32 videoSync;
static u32 videoWait;
static u32 frameCount;
static u64 starttime;
/*** OSD ***/
static u32 osd;
static char msg[16];
/***************************************************************************************/
/* Emulation video modes */
/***************************************************************************************/
static GXRModeObj *rmode;
/* 288 lines progressive (PAL 50Hz) */
static GXRModeObj TV50hz_288p =
{
VI_TVMODE_PAL_DS, // viDisplayMode
640, // fbWidth
VI_MAX_HEIGHT_PAL/2, // efbHeight
VI_MAX_HEIGHT_PAL/2, // xfbHeight
0, // viXOrigin
0, // viYOrigin
VI_MAX_WIDTH_PAL, // viWidth
VI_MAX_HEIGHT_PAL, // 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
VI_MAX_HEIGHT_PAL/2, // efbHeight
VI_MAX_HEIGHT_PAL/2, // xfbHeight
0, // viXOrigin
0, // viYOrigin
VI_MAX_WIDTH_PAL, // viWidth
VI_MAX_HEIGHT_PAL, // 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;
static s16 square[8] ATTRIBUTE_ALIGN (32);
static camera cam =
{
{0.0F, 0.0F, -100.0F},
{0.0F, -1.0F, 0.0F},
{0.0F, 0.0F, 0.0F}
};
/*** GX Display List ***/
static u8 d_list[32] ATTRIBUTE_ALIGN(32) =
{
GX_QUADS | GX_VTXFMT0, /* textured quad rendering (Vertex Format 0) */
0x00, 0x04, /* one quad = 4x vertex */
0x03, 0x00, 0x00, 0x00, 0x00, /* top left corner */
0x02, 0x00, 0x01, 0x00, 0x00, /* top right corner */
0x01, 0x00, 0x01, 0x00, 0x01, /* bottom right corner */
0x00, 0x00, 0x00, 0x00, 0x01, /* bottom left corner */
0x00, 0x00, 0x00, 0x00, 0x00, /* padding */
0x00, 0x00, 0x00, 0x00
};
/* VSYNC callback */
static void vi_callback(u32 cnt)
{
/* get audio DMA remaining length */
vu16* const _dspReg = (u16*)0xCC005000;
u16 remain = _dspReg[29];
/* adjust desired output samplerate if audio playback is not perfectly in sync with video */
if (remain > 0)
{
int samplerate;
/* check current audio DMA position (from testing, delta keeps limited to +/- one 32-bit block i.e 8 samples) */
if (remain < 5)
{
/* previous frame DMA is not yet finished (real output rate is slightly slower than expected value) */
samplerate = 47950;
}
else
{
/* current frame DMA is already started (real output rate is slightly faster than expected value) */
samplerate = 48050;
}
/* update resampler ratios if output samplerate has changed */
if (samplerate != snd.sample_rate)
{
/* this will adjust the number of samples returned on next frame(s) */
audio_set_rate(samplerate, snd.frame_rate);
}
}
/* clear VSYNC flag */
videoWait = 0;
}
/* XFB update */
static void xfb_update(u32 cnt)
{
/* check if EFB rendering is finished */
if (drawDone)
{
/* clear GX draw end flag */
drawDone = 0;
/* copy EFB to XFB */
GX_CopyDisp(xfb, GX_FALSE);
GX_Flush();
}
}
/* GX draw callback */
static void gx_callback(void)
{
/* set GX draw end flag */
drawDone = 1;
}
/* Initialize GX */
static void gxStart(void)
{
/*** Clear out FIFO area ***/
memset(&gp_fifo, 0, sizeof(gp_fifo));
/*** GX default ***/
GX_Init(&gp_fifo, sizeof(gp_fifo));
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();
/* GX rendering callback */
GX_SetDrawDoneCallback(gx_callback);
}
/* 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_XY, GX_S16, 0);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_TEX0, GX_TEX_ST, GX_S16, 0);
GX_SetVtxDesc(GX_VA_POS, GX_INDEX8);
GX_SetVtxDesc(GX_VA_TEX0, GX_DIRECT);
GX_SetArray(GX_VA_POS, square, 2 * 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, int vfilter_enabled)
{
Mtx44 p;
f32 yScale = GX_GetYScaleFactor(tvmode->efbHeight, tvmode->xfbHeight);
u16 xfbHeight = GX_SetDispCopyYScale(yScale);
u16 xfbWidth = VIDEO_PadFramebufferWidth(tvmode->fbWidth);
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 : vfilter_enabled, 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();
}
/* Update Aspect Ratio */
static void gxSetAspectRatio(int *xscale, int *yscale)
{
/* Vertical Scaling is disabled by default */
*yscale = (bitmap.viewport.h + (2 * bitmap.viewport.y)) / 2;
/* Original aspect ratio */
if (config.aspect)
{
/* Adjust vertical scaling when input & output video heights are different */
if (vdp_pal && (!gc_pal || config.render))
{
*yscale = *yscale * VI_MAX_HEIGHT_NTSC / VI_MAX_HEIGHT_PAL;
}
else if (!vdp_pal && gc_pal && !config.render)
{
*yscale = *yscale * VI_MAX_HEIGHT_PAL / VI_MAX_HEIGHT_NTSC;
}
/* Horizontal Scaling */
/* Wii/Gamecube pixel clock = 13.5 Mhz */
/* "H32" pixel clock = Master Clock / 10 = 5.3693175 Mhz (NTSC) or 5.3203424 Mhz (PAL) */
/* "H40" pixel clock = Master Clock / 8 = 6.711646875 Mhz (NTSC) or 6.650428 Mhz (PAL) */
if (config.overscan & 2)
{
/* Horizontal borders are emulated */
if (reg[12] & 1)
{
/* 348 "H40" pixels = 348 * Wii/GC pixel clock / "H40" pixel clock = approx. 700 (NTSC) or 707 (PAL) Wii/GC pixels */
*xscale = (system_clock == MCLOCK_NTSC) ? 350 : 354;
}
else
{
/* 284 "H32" pixels = 284 * Wii/GC pixel clock / "H32" pixel clock = approx. 714 (NTSC) or 721 (PAL) Wii/GC pixels */
*xscale = (system_clock == MCLOCK_NTSC) ? 357 : 361;
}
}
else
{
/* Horizontal borders are simulated */
if ((system_hw == SYSTEM_GG) && !config.gg_extra)
{
/* 160 "H32" pixels = 160 * Wii/GC pixel clock / "H32" pixel clock = approx. 403 Wii/GC pixels (NTSC only) */
*xscale = 202;
}
else
{
/* 320 "H40" pixels = 256 "H32" pixels = 256 * Wii/GC pixel clock / "H32" pixel clock = approx. 644 (NTSC) or 650 (PAL) Wii/GC pixels */
*xscale = (system_clock == MCLOCK_NTSC) ? 322 : 325;
}
}
/* Aspect correction for widescreen TV */
if (config.aspect & 2)
{
/* Keep 4:3 aspect ratio on 16:9 output */
*xscale = (*xscale * 3) / 4;
}
}
/* Manual aspect ratio */
else
{
/* By default, disable horizontal scaling */
*xscale = bitmap.viewport.w + (2 * bitmap.viewport.x);
/* Keep original aspect ratio in H32 modes */
if (!(reg[12] & 1))
{
*xscale = (*xscale * 320) / 256;
}
/* Game Gear specific: if borders are disabled, upscale to fullscreen */
if ((system_hw == SYSTEM_GG) && !config.gg_extra)
{
if (!(config.overscan & 1))
{
/* Active area height = approx. 224 non-interlaced lines (60hz) */
*yscale = 112;
}
if (!(config.overscan & 2))
{
/* Active area width = approx. 640 pixels */
*xscale = 320;
}
}
/* By default, keep NTSC aspect ratio */
if (gc_pal && !config.render)
{
/* Upscale PAL output */
*yscale = *yscale * VI_MAX_HEIGHT_PAL / VI_MAX_HEIGHT_NTSC;
}
/* 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 <= 320) && (width <= xscale))
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[0] = square[6] = xshift - xscale;
square[2] = square[4] = xshift + xscale;
square[1] = square[3] = yshift + yscale;
square[5] = square[7] = yshift - yscale;
DCFlushRange(square, 32);
GX_InvVtxCache();
}
static void gxDrawCrosshair(gx_texture *texture, int x, int y)
{
/* adjust texture dimensions to XFB->VI scaling */
int w = (texture->width * rmode->fbWidth) / (rmode->viWidth);
int h = (texture->height * rmode->efbHeight) / (rmode->viHeight);
/* Aspect correction for widescreen TV */
if (config.aspect & 2) w = (w * 3) / 4;
/* EFB scale & shift */
int xwidth = square[2] - square[6];
int ywidth = square[3] - square[7];
/* adjust texture coordinates to EFB */
x = (((x + bitmap.viewport.x) * xwidth) / (bitmap.viewport.w+2*bitmap.viewport.x)) + square[6] - w/2;
y = (((y + bitmap.viewport.y) * ywidth) / (bitmap.viewport.h+2*bitmap.viewport.y)) + square[7] - h/2;
/* 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();
/* 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();
}
static void gxDrawCdLeds(gx_texture *texture_l, gx_texture *texture_r)
{
/* adjust texture dimensions to XFB->VI scaling */
int w = (texture_l->width * rmode->fbWidth) / (rmode->viWidth);
int h = (texture_l->height * rmode->efbHeight) / (rmode->viHeight);
/* Aspect correction for widescreen TV */
if (config.aspect & 2) w = (w * 3) / 4;
/* EFB scale & shift */
int xwidth = square[2] - square[6];
int ywidth = square[3] - square[7];
/* adjust texture coordinates to EFB */
int xl = ((bitmap.viewport.x * xwidth) / vwidth) + square[6] + 8;
int xr = (((bitmap.viewport.x + bitmap.viewport.w) * xwidth) / vwidth) + square[6] - 8 - w;
int y = (((bitmap.viewport.y + bitmap.viewport.h - 4) * ywidth) / vheight) + square[7] - h;
/* load left screen texture */
GXTexObj texObj;
GX_InitTexObj(&texObj, texture_l->data, texture_l->width, texture_l->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();
/* Draw textured quad */
GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
GX_Position2s16(xl,y+h);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(0.0, 1.0);
GX_Position2s16(xl+w,y+h);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(1.0, 1.0);
GX_Position2s16(xl+w,y);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(1.0, 0.0);
GX_Position2s16(xl,y);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(0.0, 0.0);
GX_End();
/* load right screen texture */
GX_InitTexObj(&texObj, texture_r->data, texture_r->width, texture_r->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();
/* Draw textured quad */
GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
GX_Position2s16(xr,y+h);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(0.0, 1.0);
GX_Position2s16(xr+w,y+h);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(1.0, 1.0);
GX_Position2s16(xr+w,y);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(1.0, 0.0);
GX_Position2s16(xr,y);
GX_Color4u8(0xff,0xff,0xff,0xff);
GX_TexCoord2f32(0.0, 0.0);
GX_End();
}
static void gxDrawOnScreenText(char *msg)
{
GXRModeObj *temp = vmode;
int y = (40 * rmode->efbHeight) / 480;
int x = (bitmap.viewport.x > 0) ? (24 + bitmap.viewport.x) : 24;
x = (x * rmode->fbWidth) / rmode->viWidth;
vmode = rmode;
FONT_write(msg, 20, x, y, rmode->fbWidth, (GXColor)WHITE);
vmode = temp;
}
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, bitmap.data, 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, bitmap.data, 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 */
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;
texture.format = GX_TF_RGBA8;
texture.width = 320;
texture.height = bitmap.viewport.h;
texture.data = memalign(32, texture.width*texture.height*4);
if (texture.data)
{
gxCopyScreenshot(&texture);
/* open PNG file */
FILE *f = fopen(filename,"wb");
if (f)
{
/* encode screenshot into PNG file */
gxTextureWritePNG(&texture,f);
fclose(f);
}
free(texture.data);
}
}
void gxSetScreen(void)
{
VIDEO_WaitVSync();
GX_CopyDisp(xfb, GX_FALSE);
GX_Flush();
gx_input_UpdateMenu();
}
void gxClearScreen(GXColor color)
{
gxDrawRectangle(0, 0, vmode->fbWidth, vmode->efbHeight, 255, color);
}
/***************************************************************************************/
/* 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)
{
/* disable VSYNC callbacks */
VIDEO_SetPostRetraceCallback(NULL);
VIDEO_SetPreRetraceCallback(NULL);
/* wait for next even field */
/* this prevents screen artefacts when switching between interlaced & non-interlaced modes */
do VIDEO_WaitVSync();
while (!VIDEO_GetNextField());
/* adjust TV width */
vmode->viWidth = config.screen_w;
vmode->viXOrigin = (VI_MAX_WIDTH_NTSC - vmode->viWidth)/2;
/* 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]);
/* CD leds textures */
gxTextureClose(&cd_leds[0][0]);
gxTextureClose(&cd_leds[0][1]);
gxTextureClose(&cd_leds[1][0]);
gxTextureClose(&cd_leds[1][1]);
/* GX menu rendering */
gxResetRendering(1);
gxResetMode(vmode, GX_TRUE);
/* render game snapshot */
gxClearScreen((GXColor)BLACK);
gxDrawScreenshot(0xff);
#ifdef HW_RVL
/* default VI settings */
VIDEO_SetTrapFilter(1);
VIDEO_SetGamma(VI_GM_1_0);
#endif
/* reset default TV mode */
VIDEO_Configure(vmode);
VIDEO_Flush();
/* display next frame */
gxSetScreen();
}
/* Menu mode -> Emulation mode */
void gx_video_Start(void)
{
/* TV mode */
if ((config.tv_mode == 1) || ((config.tv_mode == 2) && vdp_pal))
{
/* 50 Hz */
gc_pal = 1;
}
else
{
/* 60 Hz */
gc_pal = 0;
}
/* Enable progressive or interlaced video mode */
if (config.render == 2)
{
/* 480p */
tvmodes[2]->viTVMode = (tvmodes[2]->viTVMode & ~3) | VI_PROGRESSIVE;
tvmodes[2]->xfbMode = VI_XFBMODE_SF;
/* 576p */
tvmodes[5]->viTVMode = VI_TVMODE_PAL_PROG;
tvmodes[5]->xfbMode = VI_XFBMODE_SF;
}
else if (config.render == 1)
{
/* 480i */
tvmodes[2]->viTVMode = (tvmodes[2]->viTVMode & ~3) | VI_INTERLACE;
tvmodes[2]->xfbMode = VI_XFBMODE_DF;
/* 576i */
tvmodes[5]->viTVMode = VI_TVMODE_PAL_INT;
tvmodes[5]->xfbMode = VI_XFBMODE_DF;
}
/* update horizontal border width */
if ((system_hw == SYSTEM_GG) && !config.gg_extra)
{
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);
}
case 4:
{
md_ntsc_setup_t ntsc_custom = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
ntsc_custom.sharpness = config.ntsc_sharpness;
ntsc_custom.resolution = config.ntsc_resolution;
ntsc_custom.artifacts = config.ntsc_artifacts;
ntsc_custom.fringing = config.ntsc_fringing;
ntsc_custom.bleed = config.ntsc_bleed;
sms_ntsc_init(sms_ntsc, (sms_ntsc_setup_t *)&ntsc_custom);
md_ntsc_init(md_ntsc, &ntsc_custom);
break;
}
}
}
/* on-screen display enable flag */
osd = config.fps;
/* clear any on-screen text */
memset(msg, 0, sizeof(msg));
/* 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);
osd = 1;
}
}
else
{
/* Lightgun #2 */
if (config.gun_cursor[1])
{
crosshair[1] = gxTextureOpenPNG(Crosshair_p2_png,0);
osd = 1;
}
}
}
}
/* Check for any emulated device */
if (input.dev[i] != NO_DEVICE)
{
/* increment player index */
player++;
}
}
/* CD leds textures */
if (system_hw == SYSTEM_MCD)
{
if (config.cd_leds)
{
cd_leds[0][0] = gxTextureOpenPNG(CD_access_off_png,0);
cd_leds[0][1] = gxTextureOpenPNG(CD_access_on_png,0);
cd_leds[1][0] = gxTextureOpenPNG(CD_ready_off_png,0);
cd_leds[1][1] = gxTextureOpenPNG(CD_ready_on_png,0);
osd = 1;
}
}
/* GX emulation rendering */
gxClearScreen((GXColor)BLACK);
gxResetRendering(0);
/* resynchronize emulation with VSYNC */
do VIDEO_WaitVSync();
while (!VIDEO_GetNextField());
#ifdef HW_RVL
VIDEO_SetTrapFilter(config.trap);
VIDEO_SetGamma((int)(config.gamma * 10.0));
#endif
/* XFB update is done during VBLANK */
VIDEO_SetPreRetraceCallback(xfb_update);
/* Emulation is synchronized with video hardware if VSYNC is set to AUTO & TV mode matches emulated video mode */
if (config.vsync && (gc_pal == vdp_pal))
{
VIDEO_SetPostRetraceCallback(vi_callback);
videoSync = VIDEO_WAIT;
}
else
{
videoSync = 0;
}
/* restart frame sync */
videoWait = 0;
frameCount = 0;
starttime = gettime();
}
/* GX render update */
int gx_video_Update(int status)
{
/* make sure current video frame has not already been updated */
if (status & VIDEO_UPDATE)
{
/* set video wait flag if VSYNC is enabled */
videoWait = videoSync;
/* check if display has changed during frame */
if (bitmap.viewport.changed & 1)
{
/* 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);
/* texel width must remain multiple of 4 */
vwidth = (vwidth >> 2) << 2;
}
/* initialize texture object */
GXTexObj texobj;
GX_InitTexObj(&texobj, bitmap.data, 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, config.vfilter);
/* update VI mode */
VIDEO_Configure(rmode);
VIDEO_Flush();
}
/* texture is now directly mapped by the line renderer */
/* force texture cache update */
DCFlushRange(bitmap.data, vwidth*vheight*2);
GX_InvalidateTexAll();
/* disable EFB copy until rendering is done */
drawDone = 0;
/* render textured quad */
GX_CallDispList(d_list, 32);
/* on-screen display */
if (osd)
{
/* reset GX rendering */
gxResetRendering(1);
/* 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]);
}
}
/* CD LEDS */
if (cd_leds[1][1])
{
/* CD LEDS status */
u8 mode = scd.regs[0x06 >> 1].byte.h;
gxDrawCdLeds(cd_leds[1][(mode >> 1) & 1], cd_leds[0][mode & 1]);
}
/* FPS counter */
if (config.fps)
{
u32 delta = diff_usec(starttime, gettime());
frameCount++;
if (delta > 1000000)
{
sprintf(msg,"%3.2f FPS", (float)frameCount * 1000000.0 / (float)delta);
frameCount = 0;
starttime = gettime();
}
/* disable EFB alpha blending for text background */
GX_SetBlendMode(GX_BM_NONE,GX_BL_SRCALPHA,GX_BL_INVSRCALPHA,GX_LO_CLEAR);
GX_Flush();
/* display on-screen message */
gxDrawOnScreenText(msg);
}
/* restore texture object */
GXTexObj texobj;
GX_InitTexObj(&texobj, bitmap.data, 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();
/* restore GX rendering */
gxResetRendering(0);
}
/* Do not wait for EFB rendering, GX draw interrupt will be triggered when it is finished */
GX_SetDrawDone();
/* check interlaced mode change */
if (bitmap.viewport.changed & 4)
{
/* "original" mode */
if (!config.render && config.vsync && (gc_pal == vdp_pal))
{
/* framerate has changed, reinitialize audio timings */
audio_set_rate(snd.sample_rate, get_framerate());
}
/* clear flag */
bitmap.viewport.changed &= ~4;
}
/* Check if video mode has changed */
if (bitmap.viewport.changed & 1)
{
/* clear viewport update flags */
bitmap.viewport.changed &= ~1;
/* field synchronization */
do VIDEO_WaitVSync();
while (VIDEO_GetNextField() != odd_frame);
/* resynchronize audio playback with video */
AUDIO_StopDMA();
AUDIO_StartDMA();
}
}
/* wait until current video frame starts before emulating next frame */
return ((status & ~(VIDEO_WAIT|VIDEO_UPDATE)) | videoWait);
}
/* 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/576p/480i/576i)
- set emulator rendering 60hz TV modes (MPAL/NTSC/EURGB60)
*/
vmode = VIDEO_GetPreferredMode(NULL);
/* Adjust display settings */
switch (vmode->viTVMode >> 2)
{
case VI_PAL: /* 576 lines scaled (PAL 50Hz) */
TV60hz_240p.viTVMode = VI_TVMODE_EURGB60_DS;
TV60hz_240i.viTVMode = VI_TVMODE_EURGB60_INT;
TV60hz_480i.viTVMode = VI_TVMODE_EURGB60_INT;
break;
default: /* 480 lines (NTSC, MPAL or 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);
break;
}
/* Configure VI */
VIDEO_Configure(vmode);
/* Allocate framebuffer */
xfb = (u32 *) MEM_K0_TO_K1((u32 *) SYS_AllocateFramebuffer(&TV50hz_576i));
/* Define a console */
console_init(xfb, 20, 64, 640, 574, 574 * 2);
/* Clear framebuffer to black */
VIDEO_ClearFrameBuffer(vmode, xfb, COLOR_BLACK);
/* Set the framebuffer to be displayed at next VBlank */
VIDEO_SetNextFramebuffer(xfb);
/* 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, GX_TRUE);
/* Initialize FONT */
FONT_Init();
}
void gx_video_Shutdown(void)
{
FONT_Shutdown();
VIDEO_ClearFrameBuffer(vmode, xfb, COLOR_BLACK);
VIDEO_Flush();
VIDEO_WaitVSync();
}
/* Custom NTSC blitters */
typedef unsigned short sms_ntsc_out_t;
typedef unsigned short md_ntsc_out_t;
void sms_ntsc_blit( sms_ntsc_t const* ntsc, SMS_NTSC_IN_T const* table, unsigned char* input,
int in_width, int vline)
{
int const chunk_count = in_width / sms_ntsc_in_chunk;
/* handle extra 0, 1, or 2 pixels by placing them at beginning of row */
int const in_extra = in_width - chunk_count * sms_ntsc_in_chunk;
unsigned const extra2 = (unsigned) -(in_extra >> 1 & 1); /* (unsigned) -1 = ~0 */
unsigned const extra1 = (unsigned) -(in_extra & 1) | extra2;
/* use palette entry 0 for unused pixels */
SMS_NTSC_IN_T border = table[0];
SMS_NTSC_BEGIN_ROW( ntsc, border,
(SMS_NTSC_ADJ_IN( table[input[0]] )) & extra2,
(SMS_NTSC_ADJ_IN( table[input[extra2 & 1]] )) & extra1 );
/* directly fill the RGB565 texture */
/* one tile is 32 byte = 4x4 pixels */
/* tiles are stored continuously in texture memory */
in_width = SMS_NTSC_OUT_WIDTH(in_width) / 4;
int offset = ((in_width * 32) * (vline / 4)) + ((vline & 3) * 8);
sms_ntsc_out_t* __restrict__ line_out = (sms_ntsc_out_t*)(bitmap.data + offset);
offset = 0;
int n;
input += in_extra;
for ( n = chunk_count; n; --n )
{
/* order of input and output pixels must not be altered */
SMS_NTSC_COLOR_IN( 0, ntsc, SMS_NTSC_ADJ_IN( table[*input++] ) );
SMS_NTSC_RGB_OUT( 0, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_RGB_OUT( 1, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_COLOR_IN( 1, ntsc, SMS_NTSC_ADJ_IN( table[*input++] ) );
SMS_NTSC_RGB_OUT( 2, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_RGB_OUT( 3, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_COLOR_IN( 2, ntsc, SMS_NTSC_ADJ_IN( table[*input++] ) );
SMS_NTSC_RGB_OUT( 4, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_RGB_OUT( 5, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_RGB_OUT( 6, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
}
/* finish final pixels */
SMS_NTSC_COLOR_IN( 0, ntsc, border );
SMS_NTSC_RGB_OUT( 0, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_RGB_OUT( 1, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_COLOR_IN( 1, ntsc, border );
SMS_NTSC_RGB_OUT( 2, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_RGB_OUT( 3, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_COLOR_IN( 2, ntsc, border );
SMS_NTSC_RGB_OUT( 4, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_RGB_OUT( 5, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
SMS_NTSC_RGB_OUT( 6, line_out[offset++] );
if ((offset % 4) == 0) offset += 12;
}
void md_ntsc_blit( md_ntsc_t const* ntsc, MD_NTSC_IN_T const* table, unsigned char* input,
int in_width, int vline)
{
int const chunk_count = in_width / md_ntsc_in_chunk - 1;
/* use palette entry 0 for unused pixels */
MD_NTSC_IN_T border = table[0];
MD_NTSC_BEGIN_ROW( ntsc, border,
MD_NTSC_ADJ_IN( table[*input++] ),
MD_NTSC_ADJ_IN( table[*input++] ),
MD_NTSC_ADJ_IN( table[*input++] ) );
/* directly fill the RGB565 texture */
/* one tile is 32 byte = 4x4 pixels */
/* tiles are stored continuously in texture memory */
in_width = MD_NTSC_OUT_WIDTH(in_width) >> 2;
int offset = ((in_width << 5) * (vline >> 2)) + ((vline & 3) * 8);
md_ntsc_out_t* __restrict__ line_out = (md_ntsc_out_t*)(bitmap.data + offset);
int n;
for ( n = chunk_count; n; --n )
{
/* order of input and output pixels must not be altered */
MD_NTSC_COLOR_IN( 0, ntsc, MD_NTSC_ADJ_IN( table[*input++] ) );
MD_NTSC_RGB_OUT( 0, *line_out++ );
MD_NTSC_RGB_OUT( 1, *line_out++ );
MD_NTSC_COLOR_IN( 1, ntsc, MD_NTSC_ADJ_IN( table[*input++] ) );
MD_NTSC_RGB_OUT( 2, *line_out++ );
MD_NTSC_RGB_OUT( 3, *line_out++ );
line_out += 12;
MD_NTSC_COLOR_IN( 2, ntsc, MD_NTSC_ADJ_IN( table[*input++] ) );
MD_NTSC_RGB_OUT( 4, *line_out++ );
MD_NTSC_RGB_OUT( 5, *line_out++ );
MD_NTSC_COLOR_IN( 3, ntsc, MD_NTSC_ADJ_IN( table[*input++] ) );
MD_NTSC_RGB_OUT( 6, *line_out++ );
MD_NTSC_RGB_OUT( 7, *line_out++ );
line_out += 12;
}
/* finish final pixels */
MD_NTSC_COLOR_IN( 0, ntsc, MD_NTSC_ADJ_IN( table[*input++] ) );
MD_NTSC_RGB_OUT( 0, *line_out++ );
MD_NTSC_RGB_OUT( 1, *line_out++ );
MD_NTSC_COLOR_IN( 1, ntsc, border );
MD_NTSC_RGB_OUT( 2, *line_out++ );
MD_NTSC_RGB_OUT( 3, *line_out++ );
line_out += 12;
MD_NTSC_COLOR_IN( 2, ntsc, border );
MD_NTSC_RGB_OUT( 4, *line_out++ );
MD_NTSC_RGB_OUT( 5, *line_out++ );
MD_NTSC_COLOR_IN( 3, ntsc, border );
MD_NTSC_RGB_OUT( 6, *line_out++ );
MD_NTSC_RGB_OUT( 7, *line_out++ );
}
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