1 files changed, 162 insertions, 0 deletions
diff --git a/src/libjin/Graphics/je_bitmap.cpp b/src/libjin/Graphics/je_bitmap.cpp
new file mode 100644
index 0000000..0747f0b
--- /dev/null
+++ b/src/libjin/Graphics/je_bitmap.cpp
@@ -0,0 +1,162 @@
+#define STB_IMAGE_IMPLEMENTATION
+#include "../3rdparty/stb/stb_image.h"
+
+#include "../filesystem/je_asset_database.h"
+#include "../math/je_math.h"
+
+#include "je_bitmap.h"
+
+using namespace JinEngine::Filesystem;
+using namespace JinEngine::Math;
+
+namespace JinEngine
+{
+	namespace Graphics
+	{
+
+        Bitmap* Bitmap::createBitmap(const char* path)
+        {
+            AssetDatabase* ad = AssetDatabase::get();
+            Buffer buffer; 
+            ad->read(path, buffer);
+            return createBitmap(&buffer, buffer.size());
+        }
+
+		/* 从pixel创建bitmap */
+		Bitmap* Bitmap::createBitmap(const void* pixel, unsigned width, unsigned height)
+		{
+			Bitmap* bitmap = new Bitmap(width, height);
+			memcpy(bitmap->pixels, pixel, width*height * sizeof(Color));
+			return bitmap;
+		}
+
+		/*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(unsigned w, unsigned h)
+		{
+			width = w; 
+			height = h; 
+			pixels = new Color[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];
+			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;
+		}
+
+	} // namespace Graphics
+} // namespace JinEngine
+\ No newline at end of file