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Diffstat (limited to 'backends/platform/wii/gx_supp.cpp')
| -rw-r--r-- | backends/platform/wii/gx_supp.cpp | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/backends/platform/wii/gx_supp.cpp b/backends/platform/wii/gx_supp.cpp new file mode 100644 index 0000000000..4c7b8ed58a --- /dev/null +++ b/backends/platform/wii/gx_supp.cpp @@ -0,0 +1,264 @@ +/**************************************************************************** +* Generic GX Support for Emulators +* softdev 2007 +* +* 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., +* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +* +* NGC GX Video Functions +* +* These are pretty standard functions to setup and use GX scaling. +****************************************************************************/ + +#include <gccore.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <malloc.h> + +#define DEFAULT_FIFO_SIZE (256 * 1024) + +#define HASPECT 320 +#define VASPECT 240 + +#ifdef __cplusplus +extern "C" { +#endif + +/*** 2D ***/ +static u32 whichfb; +static u32 *xfb[2]; +static GXRModeObj *vmode; + +/*** 3D GX ***/ +static u8 *gp_fifo; + +/*** Texture memory ***/ +static u8 *texturemem; +static u32 texturesize; + +GXTexObj texobj; +static Mtx view; +static u16 vwidth, vheight, oldvwidth, oldvheight; + +/* New texture based scaler */ +typedef struct tagcamera { + Vector pos; + Vector up; + Vector view; +} camera; + +static s16 square[] ATTRIBUTE_ALIGN(32) = { + -HASPECT, VASPECT, 0, + HASPECT, VASPECT, 0, + HASPECT, -VASPECT, 0, + -HASPECT, -VASPECT, 0, +}; + +static camera cam = { + { 0.0f, 0.0f, 370.0f }, + { 0.0f, 0.5f, 0.0f }, + { 0.0f, 0.0f, -0.5f } +}; + +void GX_InitVideo() { + vmode = VIDEO_GetPreferredMode(NULL); + VIDEO_Configure(vmode); + + xfb[0] = (u32 *) MEM_K0_TO_K1 (SYS_AllocateFramebuffer(vmode)); + xfb[1] = (u32 *) MEM_K0_TO_K1 (SYS_AllocateFramebuffer(vmode)); + gp_fifo = (u8 *) memalign(32, DEFAULT_FIFO_SIZE); + + VIDEO_ClearFrameBuffer(vmode, xfb[0], COLOR_BLACK); + VIDEO_ClearFrameBuffer(vmode, xfb[1], COLOR_BLACK); + + whichfb = 0; + VIDEO_SetNextFramebuffer(xfb[whichfb]); + VIDEO_SetBlack(FALSE); + VIDEO_Flush(); + VIDEO_WaitVSync(); + + if (vmode->viTVMode & VI_NON_INTERLACE) + VIDEO_WaitVSync(); +} + +/**************************************************************************** + * Scaler Support Functions + ****************************************************************************/ +static void draw_init(void) { + GX_ClearVtxDesc(); + GX_SetVtxDesc(GX_VA_POS, GX_INDEX8); + GX_SetVtxDesc(GX_VA_CLR0, GX_INDEX8); + GX_SetVtxDesc(GX_VA_TEX0, GX_DIRECT); + + GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_POS, GX_POS_XYZ, GX_S16, 0); + GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_CLR0, GX_CLR_RGBA, GX_RGBA8, 0); + GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_TEX0, GX_TEX_ST, GX_F32, 0); + + GX_SetArray(GX_VA_POS, square, 3 * sizeof(s16)); + + GX_SetNumTexGens(1); + GX_SetTexCoordGen(GX_TEXCOORD0, GX_TG_MTX2x4, GX_TG_TEX0, GX_IDENTITY); + + GX_InvalidateTexAll(); + + GX_InitTexObj(&texobj, texturemem, vwidth, vheight, GX_TF_RGB565, + GX_CLAMP, GX_CLAMP, GX_FALSE); +} + +static void draw_vert(u8 pos, u8 c, f32 s, f32 t) { + GX_Position1x8(pos); + GX_Color1x8(c); + GX_TexCoord2f32(s, t); +} + +static void draw_square(Mtx v) { + Mtx m; + Mtx mv; + + guMtxIdentity(m); + guMtxTransApply(m, m, 0, 0, -100); + guMtxConcat(v, m, mv); + + GX_LoadPosMtxImm(mv, GX_PNMTX0); + GX_Begin(GX_QUADS, GX_VTXFMT0, 4); + draw_vert(0, 0, 0.0, 0.0); + draw_vert(1, 0, 1.0, 0.0); + draw_vert(2, 0, 1.0, 1.0); + draw_vert(3, 0, 0.0, 1.0); + GX_End(); +} + +/**************************************************************************** + * StartGX + ****************************************************************************/ +void GX_Start(u16 width, u16 height, s16 haspect, s16 vaspect) { + Mtx p; + + GX_AbortFrame(); + + /*** Set new aspect ***/ + square[0] = square[9] = -haspect; + square[3] = square[6] = haspect; + square[1] = square[4] = vaspect; + square[7] = square[10] = -vaspect; + + /*** Allocate 32byte aligned texture memory ***/ + texturesize = (width * height) * 2; + texturemem = (u8 *) memalign(32, texturesize); + + GXColor gxbackground = { 0, 0, 0, 0xff }; + + /*** Clear out FIFO area ***/ + memset(gp_fifo, 0, DEFAULT_FIFO_SIZE); + + /*** Initialise GX ***/ + GX_Init(gp_fifo, DEFAULT_FIFO_SIZE); + GX_SetCopyClear(gxbackground, 0x00ffffff); + + GX_SetViewport(0, 0, vmode->fbWidth, vmode->efbHeight, 0, 1); + GX_SetDispCopyYScale((f32) vmode->xfbHeight / (f32) vmode->efbHeight); + GX_SetScissor(0, 0, vmode->fbWidth, vmode->efbHeight); + GX_SetDispCopySrc(0, 0, vmode->fbWidth, vmode->efbHeight); + GX_SetDispCopyDst(vmode->fbWidth, vmode->xfbHeight); + GX_SetCopyFilter(vmode->aa, vmode->sample_pattern, GX_TRUE, + vmode->vfilter); + GX_SetFieldMode(vmode->field_rendering, + ((vmode->viHeight == 2 * vmode->xfbHeight) ? + GX_ENABLE : GX_DISABLE)); + GX_SetPixelFmt(GX_PF_RGB8_Z24, GX_ZC_LINEAR); + GX_SetCullMode(GX_CULL_NONE); + GX_CopyDisp(xfb[whichfb ^ 1], GX_TRUE); + GX_SetDispCopyGamma(GX_GM_1_0); + + guPerspective(p, 60, 1.33f, 10.0f, 1000.0f); + GX_LoadProjectionMtx(p, GX_PERSPECTIVE); + memset(texturemem, 0, texturesize); + + GX_Flush(); + + /*** Setup for first call to scaler ***/ + vwidth = vheight = -1; +} + +/**************************************************************************** +* GX_Render +* +* Pass in a buffer, width and height to update as a tiled RGB565 texture +****************************************************************************/ +void GX_Render(u16 width, u16 height, u8 *buffer, u16 pitch) { + u16 h, w; + u64 *dst = (u64 *) texturemem; + u64 *src1 = (u64 *) buffer; + u64 *src2 = (u64 *) (buffer + pitch); + u64 *src3 = (u64 *) (buffer + (pitch * 2)); + u64 *src4 = (u64 *) (buffer + (pitch * 3)); + u16 rowpitch = (pitch >> 3) * 3 + pitch % 8; + + vwidth = width; + vheight = height; + + whichfb ^= 1; + + if ((oldvheight != vheight) || (oldvwidth != vwidth)) { + /** Update scaling **/ + oldvwidth = vwidth; + oldvheight = vheight; + draw_init(); + memset(&view, 0, sizeof(Mtx)); + guLookAt(view, &cam.pos, &cam.up, &cam.view); + GX_SetViewport(0, 0, vmode->fbWidth, vmode->efbHeight, 0, 1); + } + + GX_InvVtxCache(); + GX_InvalidateTexAll(); + GX_SetTevOp(GX_TEVSTAGE0, GX_DECAL); + GX_SetTevOrder(GX_TEVSTAGE0, GX_TEXCOORD0, GX_TEXMAP0, GX_COLOR0A0); + + for (h = 0; h < vheight; h += 4) { + for (w = 0; w < (vwidth >> 2); w++) { + *dst++ = *src1++; + *dst++ = *src2++; + *dst++ = *src3++; + *dst++ = *src4++; + } + + src1 += rowpitch; + src2 += rowpitch; + src3 += rowpitch; + src4 += rowpitch; + } + + DCFlushRange(texturemem, texturesize); + + GX_SetNumChans(1); + GX_LoadTexObj(&texobj, GX_TEXMAP0); + + draw_square(view); + + GX_DrawDone(); + + GX_SetZMode(GX_TRUE, GX_LEQUAL, GX_TRUE); + GX_SetColorUpdate(GX_TRUE); + GX_CopyDisp(xfb[whichfb], GX_TRUE); + GX_Flush(); + + VIDEO_SetNextFramebuffer(xfb[whichfb]); + VIDEO_Flush(); +} + +#ifdef __cplusplus +} +#endif + |