TexCubeDX9.cpp

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/*  Project nGenEx
        Destroyer Studios LLC
        Copyright © 1997-2004. All Rights Reserved.

        SUBSYSTEM:    nGenEx.lib
        FILE:         TexDX9.cpp
        AUTHOR:       John DiCamillo


        OVERVIEW
        ========
        Direct3D Texture Cache
*/

#include "MemDebug.h"
#include "TexCubeDX9.h"
#include "VideoDX9.h"
#include "Bitmap.h"
#include "Color.h"

// +--------------------------------------------------------------------+

void  Print(const char* fmt, ...);
void  VideoDX9Error(const char* msg, HRESULT err);

#ifndef RELEASE
#define RELEASE(x) if (x) { x->Release(); x=NULL; }
#endif

// +--------------------------------------------------------------------+

TexCubeDX9::TexCubeDX9(VideoDX9* v)
: video(v), texture(0)
{
        d3d       = video->Direct3D();
        d3ddevice = video->D3DDevice();

        for (int i = 0; i < 6; i++) {
                faces[i] = 0;
                last_modified[i] = 0;
        }
}

TexCubeDX9::~TexCubeDX9()
{
        RELEASE(texture);
}

// +--------------------------------------------------------------------+

bool
TexCubeDX9::LoadTexture(Bitmap* bmp, int face_index)
{
        if (!d3ddevice) return false;

        if (faces[face_index] == bmp && last_modified[face_index] >= bmp->LastModified())
        return true; // already loaded and hasn't been modified

        HRESULT hr = D3D_OK;

        // create the texture, if necessary
        if (!texture) {
                hr = d3ddevice->CreateCubeTexture(bmp->Width(),
                1,                // one mip level
                0,                // no specific usage
                D3DFMT_A8R8G8B8,  // format matching Color::rgba
                D3DPOOL_MANAGED,
                &texture,
                0);

                if (FAILED(hr) || !texture) {
                        VideoDX9Error("LoadTexture - could not create cube texture", hr);
                        return false;
                }
        }

        // lock the surface for writing
        D3DLOCKED_RECT    locked_rect;
        D3DCUBEMAP_FACES  face = (D3DCUBEMAP_FACES) face_index;
        hr = texture->LockRect(face, 0, &locked_rect, 0, 0);

        if (FAILED(hr)) {
                VideoDX9Error("LoadTexture - could not lock texture surface", hr);
                RELEASE(texture);
                return false;
        }

        // load the bitmap into the texture surface
        for (int i = 0; i < bmp->Height(); i++) {
                BYTE* src = (BYTE*) (bmp->HiPixels()  + i * bmp->Width());
                BYTE* dst = (BYTE*) locked_rect.pBits + i * locked_rect.Pitch;

                CopyMemory(dst, src, bmp->Width() * sizeof(Color));
        }

        // unlock the surface
        texture->UnlockRect(face, 0);

        faces[face_index]         = bmp;
        last_modified[face_index] = bmp->LastModified();

        return true;
}

// +--------------------------------------------------------------------+

IDirect3DCubeTexture9*
TexCubeDX9::GetTexture()
{
        if (texture) {
                // need to refresh anything?
                for (int i = 0; i < 6; i++) {
                        if (faces[i] && last_modified[i] < faces[i]->LastModified()) {
                                LoadTexture(faces[i], i);
                        }
                }
        }

        return texture;
}