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Genesis-Plus-GX/source/gx/gx_video.c
ekeeke31 3e82e4f058 + improved menu navigation 
+ improved menu transitions
+ GX code cleanup
2009-04-23 23:24:40 +00:00

1270 lines
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/****************************************************************************
* gx_video.c
*
* Genesis Plus GX video & rendering support
*
* code by Softdev (2006), Eke-Eke (2007,2009)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
***************************************************************************/
#include "shared.h"
#include "font.h"
#include "sms_ntsc.h"
#include "aram.h"
#include "md_ntsc.h"
#include "sms_ntsc.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_file;
extern const u8 Crosshair_p1_png[];
extern const u8 Crosshair_p2_png[];
/*** VI ***/
unsigned int *xfb[2]; /* External Framebuffers */
int whichfb = 0; /* Current Framebuffer */
GXRModeObj *vmode; /* Default Video Mode */
u8 *texturemem; /* Texture Data */
/* 50/60hz flag */
u8 gc_pal = 0;
/*** NTSC Filters ***/
sms_ntsc_t sms_ntsc;
md_ntsc_t md_ntsc;
static sms_ntsc_setup_t sms_setup;
static md_ntsc_setup_t md_setup;
/*** GX FIFO ***/
static u8 gp_fifo[DEFAULT_FIFO_SIZE] ATTRIBUTE_ALIGN (32);
/*** custom Video modes ***/
static GXRModeObj *rmode;
/*** GX Textures ***/
static u32 vwidth,vheight;
static gx_texture *crosshair[2];
/* 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
};
typedef struct tagcamera
{
Vector pos;
Vector up;
Vector view;
} camera;
/*** Square Matrix
This structure controls the size of the image on the screen.
Think of the output as a -80 x 80 by -60 x 60 graph.
***/
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}
};
static void updateFrameCount(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 renderer */
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_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 2D rendering */
static void gxResetView(GXRModeObj *tvmode)
{
Mtx44 p;
f32 yScale = GX_GetYScaleFactor(tvmode->efbHeight, tvmode->xfbHeight);
u16 xfbHeight = GX_SetDispCopyYScale(yScale);
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(tvmode->fbWidth, 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();
}
/* Reset GX/VI scaler */
static void gxResetScale(u32 width, u32 height)
{
int temp = 0;
int xscale, yscale, xshift, yshift;
/* aspect Ratio (depends on current configuration) */
if (config.aspect)
{
/* original aspect ratio */
/* the following values have been detected from comparison with a real 50/60hz Mega Drive */
if (config.overscan)
{
/* borders are emulated */
xscale = 358 + ((reg[12] & 1)*2) - gc_pal;
yscale = vdp_pal + ((gc_pal && !config.render) ? 143 : 120);
}
else
{
/* borders are simulated (black) */
xscale = 325 + ((reg[12] & 1)*2) - gc_pal;
yscale = bitmap.viewport.h / 2;
if (vdp_pal && (!gc_pal || config.render)) yscale = yscale * 240 / 288;
else if (!vdp_pal && gc_pal && !config.render) yscale = yscale * 288 / 240;
}
xshift = config.xshift;
yshift = 2 - vdp_pal + 2*(gc_pal & !config.render) + config.yshift;
}
else
{
/* manual aspect ratio (default is fullscreen) */
if (config.overscan)
{
/* borders are emulated */
xscale = 352;
yscale = (gc_pal && !config.render) ? (vdp_pal ? (268*144 / bitmap.viewport.h):143) : (vdp_pal ? (224*144 / bitmap.viewport.h):120);
}
else
{
/* borders are simulated (black) */
xscale = 320;
yscale = (gc_pal && !config.render) ? 134 : 112;
}
/* user scaling */
xscale += config.xscale;
yscale += config.yscale;
xshift = config.xshift;
yshift = config.yshift;
}
/* double resolution modes */
if (config.render)
{
yscale *= 2;
yshift *= 2;
}
/* GX scaler (by default, use EFB maximal width) */
rmode->fbWidth = 640;
if (!config.bilinear && !config.ntsc)
{
/* filtering (soft or hard) is disabled, let VI handles horizontal scaling */
/* if possible, let GX simply doubles the width, otherwise disable GX stretching completely */
if ((width * 2) <= 640) rmode->fbWidth = width * 2;
else if (width <= 640) rmode->fbWidth = width;
}
/* horizontal scaling (GX/VI) */
if (xscale > (rmode->fbWidth/2))
{
/* max width = 720 pixels */
if (xscale > 360)
{
/* save offset for later */
temp = xscale - 360;
xscale = 360;
}
/* enable VI scaler */
rmode->viWidth = xscale * 2;
rmode->viXOrigin = (720 - (xscale * 2)) / 2;
/* set GX scaling to max EFB width */
xscale = temp + (rmode->fbWidth/2);
}
else
{
/* disable VI scaler */
rmode->viWidth = rmode->fbWidth;
rmode->viXOrigin = (720 - rmode->fbWidth) / 2;
}
/* update GX scaler (Vertex Position Matrix) */
square[6] = square[3] = xscale + xshift;
square[0] = square[9] = -xscale + xshift;
square[4] = square[1] = yscale + yshift;
square[7] = square[10] = -yscale + yshift;
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 coordinate system */
x = ((x * rmode->fbWidth) / bitmap.viewport.w) - (texture->width/2) - (rmode->fbWidth/2) + (rmode->viWidth-rmode->fbWidth)/2;
y = ((y * rmode->efbHeight) / bitmap.viewport.h) - (config.render ? (texture->height/2) : (texture->height/4)) - (rmode->efbHeight/2) + (rmode->xfbHeight-rmode->efbHeight)/2;;
int w = texture->width - (rmode->viWidth-rmode->fbWidth);
int h = (config.render ? texture->height : (texture->height/2)) - (rmode->xfbHeight-rmode->efbHeight);
/* 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 ();
GX_DrawDone();
/* 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();
}
}
/* libpng read callback function */
static void png_read_from_mem (png_structp png_ptr, png_bytep data, png_size_t length)
{
png_file *file = (png_file *)png_get_io_ptr (png_ptr);
/* copy data from image buffer */
memcpy (data, file->buffer + file->offset, length);
/* advance in the file */
file->offset += length;
}
/* convert a png file into RGBA8 texture */
gx_texture *gxTextureOpenPNG(const u8 *buffer)
{
int i;
png_file file;
/* init PNG file structure */
file.buffer = (u8 *) buffer;
file.offset = 0;
/* check for valid magic number */
/*if (!png_check_sig (file.buffer, 8)) return;*/
/* 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;
}
/* set callback for the read function */
png_set_read_fn (png_ptr, (png_voidp *)(&file), png_read_from_mem);
/* 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);
#if 0
/* ensure PNG images are in the supported format */
u32 bit_depth = png_get_bit_depth(png_ptr, info_ptr);
u32 color_type = png_get_color_type(png_ptr, info_ptr);
/* 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;
}
/* 4x4 tiles are required */
if ((width%4) || (height%4))
{
png_destroy_read_struct (&png_ptr, &info_ptr, NULL);
return;
}
#endif
/* 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;
}
void gxTextureClose(gx_texture **p_texture)
{
gx_texture *texture = *p_texture;
if (texture)
{
if (texture->data) free(texture->data);
free(texture);
*p_texture = NULL;
}
}
void gxDrawScreenshot(u8 alpha)
{
if (rmode)
{
GXTexObj texobj;
GX_InitTexObj(&texobj, texturemem, vwidth, vheight, GX_TF_RGB565, GX_CLAMP, GX_CLAMP, GX_FALSE);
GX_LoadTexObj(&texobj, GX_TEXMAP0);
GX_InvalidateTexAll();
/* retrieve current xscale/xshift values */
s32 xscale = (rmode->viWidth + square[6] - square[0] - rmode->fbWidth) / 2 - (vmode->viWidth - 640)/2;
s32 xshift = (square[6] + square[0]) / 2;
/* apply current position/size */
s32 x = xshift - xscale;
s32 y = square[7];
s32 w = xscale * 2;
s32 h = square[4] - square[7];
if (rmode->efbHeight < 480)
{
y = y * 2;
h = h * 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 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 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_MIRROR, GX_MIRROR, 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 gxResetAngle(f32 angle)
{
Mtx view;
if (angle)
{
Mtx m,m1;
Vector axis = (Vector) {0,0,1};
guLookAt(m, &cam.pos, &cam.up, &cam.view);
guMtxRotAxisDeg (m1, &axis, angle);
guMtxConcat(m,m1,view);
}
else
{
guLookAt(view, &cam.pos, &cam.up, &cam.view);
}
GX_LoadPosMtxImm(view, GX_PNMTX0);
GX_Flush();
}
void gxSetScreen ()
{
GX_CopyDisp(xfb[whichfb], GX_FALSE);
GX_Flush();
VIDEO_SetNextFramebuffer (xfb[whichfb]);
VIDEO_Flush ();
VIDEO_WaitVSync ();
}
void gxClearScreen (GXColor color)
{
whichfb ^= 1;
GX_SetCopyClear(color,0x00ffffff);
GX_CopyDisp(xfb[whichfb], GX_TRUE);
GX_Flush();
}
/* Restore Menu Video mode */
void gx_video_Stop(void)
{
/* lightgun textures */
if (crosshair[0])
{
if (crosshair[0]->data) free(crosshair[0]->data);
free(crosshair[0]);
crosshair[0] = NULL;
}
if (crosshair[1])
{
if (crosshair[1]->data) free(crosshair[1]->data);
free(crosshair[1]);
crosshair[1] = NULL;
}
/* reset GX */
gxResetRendering(1);
gxResetView(vmode);
/* reset VI */
gxDrawScreenshot(0xff);
VIDEO_Configure(vmode);
VIDEO_SetPreRetraceCallback(NULL);
VIDEO_SetPostRetraceCallback(gx_input_UpdateMenu);
gxSetScreen ();
}
/* Update Video settings */
void gx_video_Start(void)
{
/* 50Hz/60Hz mode */
if ((config.tv_mode == 1) || ((config.tv_mode == 2) && vdp_pal)) gc_pal = 1;
else gc_pal = 0;
/* Video Interrupt synchronization */
VIDEO_SetPostRetraceCallback(NULL);
if (!gc_pal && !vdp_pal) VIDEO_SetPreRetraceCallback(updateFrameCount);
VIDEO_Flush();
/* interlaced/progressive 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;
}
/* software NTSC filters */
if (config.ntsc == 1)
{
sms_setup = sms_ntsc_composite;
md_setup = md_ntsc_composite;
sms_ntsc_init( &sms_ntsc, &sms_setup );
md_ntsc_init( &md_ntsc, &md_setup );
}
else if (config.ntsc == 2)
{
sms_setup = sms_ntsc_svideo;
md_setup = md_ntsc_svideo;
sms_ntsc_init( &sms_ntsc, &sms_setup );
md_ntsc_init( &md_ntsc, &md_setup );
}
else if (config.ntsc == 3)
{
sms_setup = sms_ntsc_rgb;
md_setup = md_ntsc_rgb;
sms_ntsc_init( &sms_ntsc, &sms_setup );
md_ntsc_init( &md_ntsc, &md_setup );
}
/* lightgun textures */
if ((input.system[1] == SYSTEM_MENACER) || (input.system[1] == SYSTEM_JUSTIFIER))
{
if (config.gun_cursor)
{
if (input.dev[4] == DEVICE_LIGHTGUN) crosshair[0] = gxTextureOpenPNG(Crosshair_p1_png);
if (input.dev[5] == DEVICE_LIGHTGUN) crosshair[1] = gxTextureOpenPNG(Crosshair_p2_png);
}
}
/* apply changes on next video update */
bitmap.viewport.changed = 1;
/* reset GX rendering */
gxResetRendering(0);
}
/* GX render update */
void gx_video_Update(void)
{
/* check if display has changed */
if (bitmap.viewport.changed)
{
/* update texture size */
vwidth = bitmap.viewport.w + 2 * bitmap.viewport.x;
vheight = bitmap.viewport.h + 2 * bitmap.viewport.y;
/* special cases */
if (config.render && interlaced) vheight = vheight << 1;
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);
/* reset TV mode */
if (config.render) rmode = tvmodes[gc_pal*3 + 2];
else rmode = tvmodes[gc_pal*3 + interlaced];
/* reset aspect ratio */
gxResetScale(vwidth,vheight);
/* reset GX */
gxResetView(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();
GX_DrawDone();
/* LightGun marks */
if (crosshair[0]) gxDrawCrosshair(crosshair[0], input.analog[0][0],input.analog[0][1]);
if (crosshair[1]) gxDrawCrosshair(crosshair[1], input.analog[1][0],input.analog[1][1]);
/* swap XFB */
whichfb ^= 1;
/* reconfigure VI */
if (bitmap.viewport.changed)
{
bitmap.viewport.changed = 0;
/* change VI mode */
VIDEO_Configure(rmode);
VIDEO_Flush();
/* copy EFB to XFB */
GX_CopyDisp(xfb[whichfb], GX_TRUE);
GX_Flush();
VIDEO_SetNextFramebuffer(xfb[whichfb]);
VIDEO_Flush();
/* field synchronizations */
VIDEO_WaitVSync();
if (rmode->viTVMode & VI_NON_INTERLACE) VIDEO_WaitVSync();
else while (VIDEO_GetNextField() != odd_frame) VIDEO_WaitVSync();
if (frameticker > 1) frameticker = 1;
}
else
{
/* copy EFB to XFB */
GX_CopyDisp(xfb[whichfb], GX_TRUE);
GX_Flush();
VIDEO_SetNextFramebuffer(xfb[whichfb]);
VIDEO_Flush();
}
}
/* Initialize VIDEO subsystem */
void gx_video_Init(void)
{
/*
* Before doing anything else under libogc,
* Call VIDEO_Init
*/
VIDEO_Init();
/*
* Before any memory is allocated etc.
* Rescue any tagged ROM in data 2
*/
int *romptr = (int *)0x80700000;
StartARAM();
genromsize = 0;
if (memcmp((char *)romptr,"GENPLUSR",8) == 0)
{
genromsize = romptr[2];
ARAMPut((char *) 0x80700000 + 0x20, (char *) 0x8000, genromsize);
}
/* 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;
}
/* adjust overscan */
vmode->viWidth = 658;
vmode->viXOrigin = (VI_MAX_WIDTH_NTSC - 658)/2;
#ifdef HW_RVL
if (CONF_GetAspectRatio())
{
vmode->viWidth = 672;
vmode->viXOrigin = (VI_MAX_WIDTH_NTSC - 672)/2;
}
#endif
/* 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);
gxResetView(vmode);
/* initialize FONT */
if (!FONT_Init())
{
#ifdef HW_RVL
DI_Close();
SYS_ResetSystem(SYS_RESTART,0,0);
#else
SYS_ResetSystem(SYS_HOTRESET,0,0);
#endif
}
/* Initialize texture data */
texturemem = memalign(32, TEX_SIZE);
if (!texturemem)
{
WaitPrompt("Failed to allocate texture buffer... Rebooting");
#ifdef HW_RVL
DI_Close();
SYS_ResetSystem(SYS_RESTART,0,0);
#else
SYS_ResetSystem(SYS_HOTRESET,0,0);
#endif
}
memset (texturemem, 0, TEX_SIZE);
}
void gx_video_Shutdown(void)
{
if (texturemem) free(texturemem);
FONT_Shutdown();
VIDEO_ClearFrameBuffer(vmode, xfb[whichfb], COLOR_BLACK);
VIDEO_Flush();
VIDEO_WaitVSync();
}
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