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 <pngu/pngu.h>

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

u8 * gameScreenTex = NULL; // a GX texture screen capture of the game
u8 * gameScreenTex2 = NULL; // a GX texture screen capture of the game (copy)

/****************************************************************************
 * 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

    if (CONF_GetAspectRatio() == CONF_ASPECT_16_9)
    {
        // widescreen fix
        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 ) );

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

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

	// Initialize GX
	GXColor background = { 0, 0, 0, 0xff };
	memset (&gp_fifo, 0, DEFAULT_FIFO_SIZE);
	GX_Init (&gp_fifo, DEFAULT_FIFO_SIZE);
	GX_SetCopyClear (background, 0x00ffffff);
	GX_SetDispCopyGamma (GX_GM_1_0);
	GX_SetCullMode (GX_CULL_NONE);

    ResetVideo_Menu();

    VIDEO_SetBlack(FALSE);
    // Finally, the video is up and ready for use :)

    // A console is always useful while debugging
    //console_init(xfb[0], 80, 100, 500, 350, vmode->fbWidth * 2);
}

void VIDEO_SetWidescreen(bool widescreen)
{
    if (widescreen)
    {
        // widescreen fix
        vmode->viWidth = VI_MAX_WIDTH_PAL - 12;
        vmode->viXOrigin = ((VI_MAX_WIDTH_PAL - vmode->viWidth) / 2) + 2;
    }
    else
    {
        VIDEO_GetPreferredMode(NULL);
    }

    VIDEO_Configure(vmode);
}
/****************************************************************************
 * 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()
{
    whichfb ^= 1; // flip framebuffer
    GX_SetZMode(GX_TRUE, GX_LEQUAL, GX_TRUE);
    GX_SetColorUpdate(GX_TRUE);
    GX_CopyDisp(xfb[whichfb], GX_TRUE);
    GX_DrawDone();
    VIDEO_SetNextFramebuffer(xfb[whichfb]);
    VIDEO_Flush();
    VIDEO_WaitVSync();
    frameCount++;
}

/****************************************************************************
 * 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);
}
/****************************************************************************
 * TakeScreenshot
 *
 * Copies the current screen into a file "path"
 ***************************************************************************/
s32 TakeScreenshot(const char *path)
{
    gprintf("\nTakeScreenshot(%s)", path);
    IMGCTX ctx = PNGU_SelectImageFromDevice(path);
    s32 ret = PNGU_EncodeFromYCbYCr(ctx, vmode->fbWidth, vmode->efbHeight, xfb[whichfb], 0);
    PNGU_ReleaseImageContext(ctx);
    gprintf(":%d", ret);
    return 1;
}