- First commit to gitea

texture.cpp

@@ -0,0 +1,71 @@
+#include "texture.h"
+#define STB_IMAGE_IMPLEMENTATION
+#define STBI_NO_FAILURE_STRINGS
+#include "stb_image.h"
+#include <SDL2/SDL_opengl.h>
+
+namespace Texture
+{
+	unsigned texture = 0;
+
+	unsigned Create(const int w, const int h)
+	{
+		unsigned texture;
+		glGenTextures(1, &texture);
+		glBindTexture(GL_TEXTURE_2D, texture);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		if (w != -1) glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
+		return texture;
+	}
+
+	const bool Load(const unsigned& texture, const char* filename)
+	{
+		int x,y,n;
+		char name[400]; strcpy(name, filename);
+		if (strrchr(filename, '.') == nullptr) strcat(name, ".png");
+		unsigned char *data = stbi_load(name, &x, &y, &n, 4);
+		if (data == nullptr) return false;
+
+		glBindTexture(GL_TEXTURE_2D, texture);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, x, y, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
+
+		stbi_image_free(data);
+
+		return true;
+	}
+
+	uint8_t* Load(const char* filename)
+	{
+		int x,y,n;
+		char name[400]; strcpy(name, filename);
+		if (strrchr(filename, '.') == nullptr) strcat(name, ".png");
+		unsigned char *data = stbi_load(name, &x, &y, &n, 4);
+		return data;
+	}
+
+	void Update(const unsigned& texture, const int w, const int h, const uint8_t* data)
+	{
+		glBindTexture(GL_TEXTURE_2D, texture);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
+	}
+}
+
+namespace Bitmap
+{
+	void PutPixel(uint8_t* data, const int x, const int y, const Color& color)
+	{
+		memcpy(&data[x+y*128], &color, 4);
+	}
+
+	const Color GetPixel(uint8_t* data, const int x, const int y)
+	{
+		Color color;
+		data += (x+y*128);
+		color.r = *(data++);
+		color.g = *(data++);
+		color.b = *(data++);
+		color.a = *(data++);
+		return color;
+	}
+}