bool
disk_super_block::IsValid() const
{
if (Magic1() != (int32)SUPER_BLOCK_MAGIC1
|| Magic2() != (int32)SUPER_BLOCK_MAGIC2
|| Magic3() != (int32)SUPER_BLOCK_MAGIC3
|| (int32)block_size != inode_size
|| ByteOrder() != SUPER_BLOCK_FS_LENDIAN
|| (1UL << BlockShift()) != BlockSize()
|| AllocationGroups() < 1
|| AllocationGroupShift() < 1
|| BlocksPerAllocationGroup() < 1
|| NumBlocks() < 10
|| AllocationGroups() != divide_roundup(NumBlocks(),
1L << AllocationGroupShift()))
return false;
return true;
}
void Printer::Print(const mtlChars &str)
{
line_height = mmlMax(line_height, size);
for (int i = 0; i < str.GetSize(); ++i) {
char ch = str[i];
if (mtlChars::IsNewline(ch)) {
y += line_height;
line_height = size;
x = x_margin;
continue;
}
if (!mtlChars::IsWhitespace(ch)) {
mglDrawCharSmall(ch, (mtlByte*)video->pixels, video->format->BytesPerPixel, ByteOrder(), video->w, video->h, x, y, r, g, b, size);
}
x += mglFontSmall_CharWidthPx * size;
}
}
ByteOrder getByteOrder() const { return ByteOrder(TAO_BYTE_ORDER); }
int InteractiveDemo( void )
{
if (SDL_Init(SDL_INIT_VIDEO) == -1) {
std::cout << SDL_GetError() << std::endl;
return 1;
}
atexit(SDL_Quit);
if (SDL_SetVideoMode(512, 512, 24, SDL_SWSURFACE|SDL_DOUBLEBUF) == NULL) {
std::cout << SDL_GetError() << std::endl;
return 1;
}
SDL_WM_SetCaption("SWSL test", NULL);
const float side_len = 300.0f;
const float base_len = side_len * sin(mmlPI / 3.0f);
mmlVector<2> a_pos = mmlVector<2>(side_len * 0.5f, 0.0f);
mmlVector<2> b_pos = mmlVector<2>(side_len, base_len);
mmlVector<2> c_pos = mmlVector<2>( 0.0f, base_len);
mmlVector<2> center = (a_pos + b_pos + c_pos) / 3.0f;
a_pos -= center;
b_pos -= center;
c_pos -= center;
SDL_Event event;
swsl::Shader shader;
bool quit = false;
bool reload_shader = true;
bool shader_status = false;
swsl::Rasterizer raster;
Printer p;
p.SetColor(0, 255, 0);
raster.CreateBuffers(video->w, video->h);
raster.SetShader(&shader);
while (!quit) {
Uint32 frame_start = SDL_GetTicks();
if (reload_shader) {
reload_shader = false;
shader_status = LoadShader("../swsl_samples/interactive.swsl", shader);
}
while (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_KEYDOWN:
if (event.key.keysym.sym == SDLK_r) {
reload_shader = true;
}
break;
case SDL_QUIT: quit = true; break;
}
}
Vertex<3> a, b, c;
//mmlMatrix<2,2> rmat = mml2DRotationMatrix((float)SDL_GetTicks() / 1000.0f);
mmlMatrix<2,2> rmat = mmlMatrix<2,2>::IdentityMatrix();
mmlVector<2> at = a_pos * rmat;
mmlVector<2> bt = b_pos * rmat;
mmlVector<2> ct = c_pos * rmat;
a.coord.x = round(at[0]) + video->w / 2;
a.coord.y = round(at[1]) + video->h / 2;
b.coord.x = round(bt[0]) + video->w / 2;
b.coord.y = round(bt[1]) + video->h / 2;
c.coord.x = round(ct[0]) + video->w / 2;
c.coord.y = round(ct[1]) + video->h / 2;
a.attributes[0] = 1.0f;
a.attributes[1] = 0.0f;
a.attributes[2] = 0.0f;
b.attributes[0] = 0.0f;
b.attributes[1] = 1.0f;
b.attributes[2] = 0.0f;
c.attributes[0] = 0.0f;
c.attributes[1] = 0.0f;
c.attributes[2] = 1.0f;
//float rgb[] = { 1.0f, 1.0f, 1.0f };
//raster.ClearBuffers(rgb);
raster.ClearBuffers();
Uint32 render_start = SDL_GetTicks();
raster.FillTriangle(a.coord, b.coord, c.coord, a.attributes, b.attributes, c.attributes);
Uint32 render_end = SDL_GetTicks();
Uint32 render_time = render_end - render_start;
raster.WriteColorBuffer((mtlByte*)video->pixels, video->format->BytesPerPixel, ByteOrder());
if (!shader_status) {
p.SetColor(255, 0, 0);
p.Print("Shader execution failed");
p.Newline();
} else {
p.SetColor(0, 255, 0);
}
p.Print("Press \'r\' to reload shader");
p.Newline();
p.Print("Render time: ");
p.Print((int)render_time);
p.Print("/");
Uint32 frame_end = SDL_GetTicks();
Uint32 frame_time = frame_end - frame_start;
p.Print((int)frame_time);
p.Print(" ms");
p.ResetCaret();
SDL_Flip(video);
if ((int)(25 - render_time) > 0) {
SDL_Delay(25 - render_time);
}
}
SDL_Quit();
return 0;
}
