usbloadergx/source/video.cpp

/****************************************************************************
 * libwiigui Template
 * Tantric 2009
 *
 * video.cpp
 * Video routines
 ***************************************************************************/

#include <gccore.h>
#include <ogcsys.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wiiuse/wpad.h>

#include "input.h"
#include "libwiigui/gui.h"

#include "settings/cfg.h"

#define DEFAULT_FIFO_SIZE 256 * 1024
static unsigned int *xfb[2] = { NULL, NULL }; // Double buffered
static int whichfb = 0; // Switch
static GXRModeObj *vmode; // Menu video mode
static unsigned char gp_fifo[DEFAULT_FIFO_SIZE] ATTRIBUTE_ALIGN (32);
static Mtx GXmodelView2D;
int screenheight;
int screenwidth;
u32 frameCount = 0;

/****************************************************************************
 * UpdatePadsCB
 *
 * called by postRetraceCallback in InitGCVideo - scans gcpad and wpad
 ***************************************************************************/
static void
UpdatePadsCB () {
    frameCount++;
#ifdef HW_RVL
    WPAD_ScanPads();
#endif
    PAD_ScanPads();

    for (int i=3; i >= 0; i--) {
#ifdef HW_RVL
        memcpy(&userInput[i].wpad, WPAD_Data(i), sizeof(WPADData));
#endif

        userInput[i].chan = i;
        userInput[i].pad.btns_d = PAD_ButtonsDown(i);
        userInput[i].pad.btns_u = PAD_ButtonsUp(i);
        userInput[i].pad.btns_h = PAD_ButtonsHeld(i);
        userInput[i].pad.stickX = PAD_StickX(i);
        userInput[i].pad.stickY = PAD_StickY(i);
        userInput[i].pad.substickX = PAD_SubStickX(i);
        userInput[i].pad.substickY = PAD_SubStickY(i);
        userInput[i].pad.triggerL = PAD_TriggerL(i);
        userInput[i].pad.triggerR = PAD_TriggerR(i);
    }
}

/****************************************************************************
 * StartGX
 *
 * Initialises GX and sets it up for use
 ***************************************************************************/
static void
StartGX () {
    GXColor background = { 0, 0, 0, 0xff };

    /*** Clear out FIFO area ***/
    memset (&gp_fifo, 0, DEFAULT_FIFO_SIZE);

    /*** Initialise GX ***/
    GX_Init (&gp_fifo, DEFAULT_FIFO_SIZE);
    GX_SetCopyClear (background, 0x00ffffff);

    GX_SetDispCopyGamma (GX_GM_1_0);
    GX_SetCullMode (GX_CULL_NONE);
}

/****************************************************************************
 * ResetVideo_Menu
 *
 * Reset the video/rendering mode for the menu
****************************************************************************/
void
ResetVideo_Menu() {
    Mtx44 p;
    f32 yscale;
    u32 xfbHeight;

    VIDEO_Configure (vmode);
    VIDEO_Flush();
    VIDEO_WaitVSync();
    if (vmode->viTVMode & VI_NON_INTERLACE)
        VIDEO_WaitVSync();
    else
        while (VIDEO_GetNextField())
            VIDEO_WaitVSync();

    // clears the bg to color and clears the z buffer
    GXColor background = {0, 0, 0, 255};
    GX_SetCopyClear (background, 0x00ffffff);

    yscale = GX_GetYScaleFactor(vmode->efbHeight,vmode->xfbHeight);
    xfbHeight = GX_SetDispCopyYScale(yscale);
    GX_SetScissor(0,0,vmode->fbWidth,vmode->efbHeight);
    GX_SetDispCopySrc(0,0,vmode->fbWidth,vmode->efbHeight);
    GX_SetDispCopyDst(vmode->fbWidth,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));

    if (vmode->aa)
        GX_SetPixelFmt(GX_PF_RGB565_Z16, GX_ZC_LINEAR);
    else
        GX_SetPixelFmt(GX_PF_RGB8_Z24, GX_ZC_LINEAR);

    // setup the vertex descriptor
    // tells the flipper to expect direct data
    GX_ClearVtxDesc();
    GX_InvVtxCache ();
    GX_InvalidateTexAll();

    GX_SetVtxDesc(GX_VA_TEX0, GX_NONE);
    GX_SetVtxDesc(GX_VA_POS, GX_DIRECT);
    GX_SetVtxDesc (GX_VA_CLR0, GX_DIRECT);

    GX_SetVtxAttrFmt (GX_VTXFMT0, GX_VA_POS, GX_POS_XYZ, GX_F32, 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_SetZMode (GX_FALSE, GX_LEQUAL, GX_TRUE);

    GX_SetNumChans(1);
    GX_SetNumTexGens(1);
    GX_SetTevOp (GX_TEVSTAGE0, GX_PASSCLR);
    GX_SetTevOrder(GX_TEVSTAGE0, GX_TEXCOORD0, GX_TEXMAP0, GX_COLOR0A0);
    GX_SetTexCoordGen(GX_TEXCOORD0, GX_TG_MTX2x4, GX_TG_TEX0, GX_IDENTITY);

    guMtxIdentity(GXmodelView2D);
    guMtxTransApply (GXmodelView2D, GXmodelView2D, 0.0F, 0.0F, -200.0F);
    GX_LoadPosMtxImm(GXmodelView2D,GX_PNMTX0);

    guOrtho(p,0,479,0,639,0,300);
    GX_LoadProjectionMtx(p, GX_ORTHOGRAPHIC);

    GX_SetViewport(0,0,vmode->fbWidth,vmode->efbHeight,0,1);
    GX_SetBlendMode(GX_BM_BLEND, GX_BL_SRCALPHA, GX_BL_INVSRCALPHA, GX_LO_CLEAR);
    GX_SetAlphaUpdate(GX_TRUE);
}

/****************************************************************************
 * InitVideo
 *
 * This function MUST be called at startup.
 * - also sets up menu video mode
 ***************************************************************************/

void
InitVideo () {
    VIDEO_Init();
    vmode = VIDEO_GetPreferredMode(NULL); // get default video mode

    // widescreen fix
    if (CFG.widescreen) {
        vmode->viWidth = VI_MAX_WIDTH_PAL-12;
        vmode->viXOrigin = ((VI_MAX_WIDTH_PAL - vmode->viWidth) / 2) + 2;
    }

    VIDEO_Configure (vmode);

    screenheight = 480;
    screenwidth = vmode->fbWidth;

    // Allocate the video buffers
    xfb[0] = (u32 *) MEM_K0_TO_K1 (SYS_AllocateFramebuffer (vmode));
    xfb[1] = (u32 *) MEM_K0_TO_K1 (SYS_AllocateFramebuffer (vmode));

    // A console is always useful while debugging
    console_init (xfb[0], 20, 64, vmode->fbWidth, vmode->xfbHeight, vmode->fbWidth * 2);

    // Clear framebuffers etc.
    VIDEO_ClearFrameBuffer (vmode, xfb[0], COLOR_BLACK);
    VIDEO_ClearFrameBuffer (vmode, xfb[1], COLOR_BLACK);
    VIDEO_SetNextFramebuffer (xfb[0]);

    // video callback
    VIDEO_SetPostRetraceCallback ((VIRetraceCallback)UpdatePadsCB);

    VIDEO_SetBlack (FALSE);
    VIDEO_Flush ();
    VIDEO_WaitVSync ();
    if (vmode->viTVMode & VI_NON_INTERLACE)
        VIDEO_WaitVSync ();

    StartGX();
    ResetVideo_Menu();
    // Finally, the video is up and ready for use :)
}

/****************************************************************************
 * StopGX
 *
 * Stops GX (when exiting)
 ***************************************************************************/
void StopGX() {
    GX_AbortFrame();
    GX_Flush();

    VIDEO_SetBlack(TRUE);
    VIDEO_Flush();
}

/****************************************************************************
 * Menu_Render
 *
 * Renders everything current sent to GX, and flushes video
 ***************************************************************************/
void Menu_Render() {
    GX_DrawDone ();

    whichfb ^= 1; // flip framebuffer
    GX_SetZMode(GX_TRUE, GX_LEQUAL, GX_TRUE);
    GX_SetColorUpdate(GX_TRUE);
    GX_CopyDisp(xfb[whichfb],GX_TRUE);
    VIDEO_SetNextFramebuffer(xfb[whichfb]);
    VIDEO_Flush();
    VIDEO_WaitVSync();
}

/****************************************************************************
 * Menu_DrawImg
 *
 * Draws the specified image on screen using GX
 ***************************************************************************/
void Menu_DrawImg(f32 xpos, f32 ypos, f32 zpos, f32 width, f32 height, u8 data[],
                  f32 degrees, f32 scaleX, f32 scaleY, u8 alpha, int XX1, int YY1,int XX2, int YY2,int XX3, int YY3,int XX4, int YY4) {
    if (data == NULL)
        return;

    GXTexObj texObj;

    GX_InitTexObj(&texObj, data, width,height, GX_TF_RGBA8,GX_CLAMP, GX_CLAMP,GX_FALSE);
    GX_LoadTexObj(&texObj, GX_TEXMAP0);
    GX_InvalidateTexAll();

    GX_SetTevOp (GX_TEVSTAGE0, GX_MODULATE);
    GX_SetVtxDesc (GX_VA_TEX0, GX_DIRECT);

    Mtx m,m1,m2, mv;
    width *=.5;
    height*=.5;
    guMtxIdentity (m1);
    guMtxScaleApply(m1,m1,scaleX,scaleY,1.0);
    guVector axis = (guVector) {
        0 , 0, 1
    };
    guMtxRotAxisDeg (m2, &axis, degrees);
//	guMtxConcat(m2,m1,m);
    guMtxConcat(m1,m2,m);

    guMtxTransApply(m,m, xpos+width+0.5,ypos+height+0.5,zpos);
    guMtxConcat (GXmodelView2D, m, mv);
    GX_LoadPosMtxImm (mv, GX_PNMTX0);
//

    GX_Begin(GX_QUADS, GX_VTXFMT0,4);
    GX_Position3f32(-width+XX1 , -height+YY1,  0);
    GX_Color4u8(0xFF,0xFF,0xFF,alpha);
    GX_TexCoord2f32(0, 0);

    GX_Position3f32(width+XX2, -height+YY2,  0);
    GX_Color4u8(0xFF,0xFF,0xFF,alpha);
    GX_TexCoord2f32(1, 0);

    GX_Position3f32(width+XX3, height+YY3,  0);
    GX_Color4u8(0xFF,0xFF,0xFF,alpha);
    GX_TexCoord2f32(1, 1);

    GX_Position3f32(-width+XX4, height+YY4,  0);
    GX_Color4u8(0xFF,0xFF,0xFF,alpha);
    GX_TexCoord2f32(0, 1);

//

    GX_End();
    GX_LoadPosMtxImm (GXmodelView2D, GX_PNMTX0);

    GX_SetTevOp (GX_TEVSTAGE0, GX_PASSCLR);
    GX_SetVtxDesc (GX_VA_TEX0, GX_NONE);
}


/****************************************************************************
 * Menu_DrawRectangle
 *
 * Draws a rectangle at the specified coordinates using GX
 ***************************************************************************/
void Menu_DrawRectangle(f32 x, f32 y, f32 width, f32 height, GXColor color, u8 filled) {
    u8 fmt;
    long n;
    int i;
    f32 x2 = x+width;
    f32 y2 = y+height;
    guVector v[] = {{x,y,0.0f}, {x2,y,0.0f}, {x2,y2,0.0f}, {x,y2,0.0f}, {x,y,0.0f}};

    if (!filled) {
        fmt = GX_LINESTRIP;
        n = 5;
    } else {
        fmt = GX_TRIANGLEFAN;
        n = 4;
    }

    GX_Begin(fmt, GX_VTXFMT0, n);
    for (i=0; i<n; i++) {
        GX_Position3f32(v[i].x, v[i].y,  v[i].z);
        GX_Color4u8(color.r, color.g, color.b, color.a);
    }
    GX_End();
}

void Menu_DrawDiskCover(f32 xpos, f32 ypos, f32 zpos, u16 width, u16 height, u16 distance,u8 data[],
                        f32 deg_alpha, f32 deg_beta, f32 scaleX, f32 scaleY, u8 alpha, bool shadow) {
    if (data == NULL)
        return;

    GXTexObj texObj;

    GX_InitTexObj(&texObj, data, width,height, GX_TF_RGBA8,GX_CLAMP, GX_CLAMP,GX_FALSE);
    GX_LoadTexObj(&texObj, GX_TEXMAP0);
    GX_InvalidateTexAll();

    GX_SetTevOp (GX_TEVSTAGE0, GX_MODULATE);
    GX_SetVtxDesc (GX_VA_TEX0, GX_DIRECT);


    f32 cos_beta = cos(DegToRad(deg_beta));
    f32 s_offset_y = (zpos + (cos_beta * distance)) * tan(DegToRad(5));
    f32 s_offset_x = (cos_beta<0?-cos_beta:cos_beta) * s_offset_y;
    f32 s_offset_z = (s_offset_y<0 ? 0 : s_offset_y)*2;

    Mtx m,m1,m2,m3,m4, mv;
    width *=.5;
    height*=.5;
    guMtxIdentity (m4);
    guMtxTransApply(m4,m4, 0, 0, distance);

    guMtxIdentity (m1);
    guMtxScaleApply(m1,m1,scaleX,scaleY,1.0);
    guVector axis2 = (guVector) {
        0 , 1, 0
    };
    guMtxRotAxisDeg (m2, &axis2, deg_beta);
    guVector axis = (guVector) {
        0 , 0, 1
    };
    guMtxRotAxisDeg (m3, &axis, deg_alpha);
//	guMtxConcat(m2,m1,m);
    guMtxConcat(m3,m4,m3); // move distance then rotate z-axis
    guMtxConcat(m2,m3,m2); // rotate y-axis
    guMtxConcat(m1,m2,m); // scale

    if (shadow)
        guMtxTransApply(m,m, xpos+width+0.5+s_offset_x,ypos+height+0.5+s_offset_y,zpos-s_offset_z);
    else
        guMtxTransApply(m,m, xpos+width+0.5,ypos+height+0.5,zpos);



    guMtxConcat (GXmodelView2D, m, mv);
    GX_LoadPosMtxImm (mv, GX_PNMTX0);

    if (shadow) {
        GX_Begin(GX_QUADS, GX_VTXFMT0,4);
        GX_Position3f32(-width, -height,  0);
        GX_Color4u8(0,0,0,alpha);
        GX_TexCoord2f32(0, 0);

        GX_Position3f32(width, -height,  0);
        GX_Color4u8(0,0,0,alpha);
        GX_TexCoord2f32(1, 0);

        GX_Position3f32(width, height,  0);
        GX_Color4u8(0,0,0,alpha);
        GX_TexCoord2f32(1, 1);

        GX_Position3f32(-width, height,  0);
        GX_Color4u8(0,0,0,alpha);
        GX_TexCoord2f32(0, 1);
    } else {
        GX_Begin(GX_QUADS, GX_VTXFMT0,4);
        GX_Position3f32(-width, -height,  0);
        GX_Color4u8(0xFF,0xFF,0xFF,alpha);
        GX_TexCoord2f32(0, 0);

        GX_Position3f32(width, -height,  0);
        GX_Color4u8(0xFF,0xFF,0xFF,alpha);
        GX_TexCoord2f32(1, 0);

        GX_Position3f32(width, height,  0);
        GX_Color4u8(0xFF,0xFF,0xFF,alpha);
        GX_TexCoord2f32(1, 1);

        GX_Position3f32(-width, height,  0);
        GX_Color4u8(0xFF,0xFF,0xFF,alpha);
        GX_TexCoord2f32(0, 1);
    }

    GX_End();
    GX_LoadPosMtxImm (GXmodelView2D, GX_PNMTX0);

    GX_SetTevOp (GX_TEVSTAGE0, GX_PASSCLR);
    GX_SetVtxDesc (GX_VA_TEX0, GX_NONE);
}

void Menu_DrawTPLImg(f32 xpos, f32 ypos, f32 zpos, f32 width, f32 height, GXTexObj *texObj,
                     f32 degrees, f32 scaleX, f32 scaleY, u8 alpha, int XX1, int YY1,int XX2, int YY2,int XX3, int YY3,int XX4, int YY4) {
    GX_LoadTexObj(texObj, GX_TEXMAP0);
    GX_InvalidateTexAll();

    GX_SetTevOp (GX_TEVSTAGE0, GX_REPLACE);
    GX_SetVtxDesc (GX_VA_TEX0, GX_DIRECT);

    Mtx m,m1,m2, mv;
    width *=.5;
    height*=.5;
    guMtxIdentity (m1);
    guMtxScaleApply(m1,m1,scaleX,scaleY,1.0);
    guVector axis = (guVector) {
        0 , 0, 1
    };
    guMtxRotAxisDeg (m2, &axis, degrees);
    guMtxConcat(m1,m2,m);

    guMtxTransApply(m,m, xpos+width+0.5,ypos+height+0.5,zpos);
    guMtxConcat (GXmodelView2D, m, mv);
    GX_LoadPosMtxImm (mv, GX_PNMTX0);

    GX_Begin(GX_QUADS, GX_VTXFMT0,4);
    GX_Position3f32(-width+XX1 , -height+YY1,  0);
    GX_Color4u8(0xFF,0xFF,0xFF,alpha);
    GX_TexCoord2f32(0, 0);

    GX_Position3f32(width+XX2, -height+YY2,  0);
    GX_Color4u8(0xFF,0xFF,0xFF,alpha);
    GX_TexCoord2f32(1, 0);

    GX_Position3f32(width+XX3, height+YY3,  0);
    GX_Color4u8(0xFF,0xFF,0xFF,alpha);
    GX_TexCoord2f32(1, 1);

    GX_Position3f32(-width+XX4, height+YY4,  0);
    GX_Color4u8(0xFF,0xFF,0xFF,alpha);
    GX_TexCoord2f32(0, 1);

    GX_End();
    GX_LoadPosMtxImm (GXmodelView2D, GX_PNMTX0);

    GX_SetTevOp (GX_TEVSTAGE0, GX_PASSCLR);
    GX_SetVtxDesc (GX_VA_TEX0, GX_NONE);
}