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#include "Bitmap.h"
#include "../3rdparty/stb/stb_image.h"
#include "../Math/math.h"
using namespace jin::math;
namespace jin
{
namespace graphics
{
/*static*/ Bitmap* Bitmap::createBitmap(const void* imgData, size_t size)
{
if (imgData == nullptr)
return nullptr;
int w, h;
void* data = stbi_load_from_memory((unsigned char *)imgData, size, &w, &h, NULL, STBI_rgb_alpha);
if (data == nullptr)
return nullptr;
Bitmap* bitmap = new Bitmap();
bitmap->pixels = (Color*)data;
bitmap->width = w;
bitmap->height = h;
return bitmap;
}
/*static*/ Bitmap* Bitmap::createBitmap(int w, int h, Color color)
{
Bitmap* bitmap = new Bitmap(w, h);
if (color != Color::BLACK)
bitmap->setPixels(color);
return bitmap;
}
/*static */ Bitmap* Bitmap::clone(const Bitmap* bitmap)
{
Bitmap* b = new Bitmap();
int w = bitmap->getWidth();
int h = bitmap->getHeight();
b->resetPixels(bitmap->getPixels(), w, h);
return b;
}
Bitmap::Bitmap()
: width(0)
, height(0)
, pixels(nullptr)
{
}
Bitmap::Bitmap(int w, int h)
{
width = w;
height = h;
pixels = new Color[w*h];
}
Bitmap::~Bitmap()
{
stbi_image_free(pixels);
}
void Bitmap::bindPixels(Color* p, int w, int h)
{
if (pixels != nullptr)
delete[] pixels;
pixels = p;
width = w;
height = h;
}
void Bitmap::resetPixels(const Color* p, int w, int h)
{
if (pixels != nullptr)
delete[] pixels;
pixels = new Color[w*h];
size_t s = w * h * sizeof(Color);
memcpy(pixels, p, s);
width = w;
height = h;
}
void Bitmap::setPixel(const Color& c, int x, int y)
{
if (pixels == nullptr)
return;
if (without<int>(x, 0, width - 1) || without<int>(y, 0, height - 1))
return;
pixels[x + y * width] = c;
}
void Bitmap::resetPixels(const Color& c, int w, int h)
{
if (pixels != nullptr)
delete[] pixels;
pixels = new Color[w*h];
size_t s = w * h * sizeof(Color);
width = w;
height = h;
for (int x = 0; x < w; ++x)
{
for (int y = 0; y < h; ++y)
{
pixels[x + y * w] = c;
}
}
}
void Bitmap::setPixels(Color* p)
{
size_t s = width * height * sizeof(Color);
memcpy(pixels, p, s);
}
void Bitmap::setPixels(Color c)
{
for (int x = 0; x < width; ++x)
{
for (int y = 0; y < height; ++y)
{
pixels[x + y * width] = c;
}
}
}
Color Bitmap::getPixel(int x, int y)
{
if (pixels == nullptr)
return Color::BLACK;
if (without<int>(x, 0, width - 1) || without<int>(y, 0, height - 1))
return Color::BLACK;
return pixels[x + y * width];
}
const Color* Bitmap::getPixels() const
{
return pixels;
}
}
}
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