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#define STB_IMAGE_IMPLEMENTATION
#include "stb/stb_image.h"
#include "../common/exception.h"
#include "../filesystem/asset_database.h"
#include "../math/math.h"
#include "bitmap.h"
using namespace JinEngine::Filesystem;
using namespace JinEngine::Math;
namespace JinEngine
{
namespace Graphics
{
Bitmap* Bitmap::clone()
{
Bitmap* b = new Bitmap(this);
return b;
}
Bitmap::Bitmap()
: width(0)
, height(0)
, pixels(nullptr)
{
}
Bitmap::Bitmap(unsigned w, unsigned h)
{
width = w;
height = h;
pixels = new Color[w*h];
if (pixels == nullptr)
throw Exception("No enough memory.");
}
Bitmap::Bitmap(const char* path)
{
AssetDatabase* ad = AssetDatabase::get();
Buffer buffer;
ad->read(path, buffer);
new (this) Bitmap(&buffer, buffer.size());
}
Bitmap::Bitmap(const void* pix, unsigned w, unsigned h)
{
new (this) Bitmap(w, h);
memcpy(pixels, pix, w * h * sizeof(Color));
}
Bitmap::Bitmap(const void* imgData, size_t size)
{
if (imgData == nullptr)
return;
int w, h;
void* data = stbi_load_from_memory((unsigned char *)imgData, size, &w, &h, NULL, STBI_rgb_alpha);
if (data == nullptr)
{
throw Exception("Could not create bitmap from image data.");
return;
}
new (this) Bitmap();
pixels = (Color*)data;
width = w;
height = h;
}
Bitmap::Bitmap(int w, int h, Color color)
{
new (this) Bitmap(w, h);
if (color != Color::BLACK)
setPixels(color);
}
Bitmap::Bitmap(int w, int h, std::function<Color(int, int, int, int)> drawer)
{
new (this) Bitmap(w, h);
for (int y = 0; y < height; ++y)
{
for (int x = 0; x < width; ++x)
{
Color c = drawer(width, height, x, y);
setPixel(c, x, y);
}
}
}
Bitmap::Bitmap(const Bitmap* bitmap)
{
new (this) Bitmap();
int w = bitmap->getWidth();
int h = bitmap->getHeight();
resetPixels(bitmap->getPixels(), w, h);
}
Bitmap::~Bitmap()
{
stbi_image_free(pixels);
}
void Bitmap::bind(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];
if (pixels == nullptr)
throw Exception("Not enough memory.");
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)
throw Exception("Bitmap don't have pixel space.");
if (without<int>(x, 0, width - 1) || without<int>(y, 0, height - 1))
return;
if (x + y * width >= width * height)
throw Exception("Pixel <%d, %d> of bitmap is out of range.", x, y);
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];
if (pixels == nullptr)
throw Exception("Not enough memory.");
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, int count)
{
if (count > width * height)
throw Exception("Pixels are out of range.");
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;
}
} // namespace Graphics
} // namespace JinEngine
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