Complete port over to C, replace glm math lib

src/Texture.c

@@ -0,0 +1,81 @@
+#include <Dengine\Texture.h>
+
+enum BytesPerPixel
+{
+	Greyscale      = 1,
+	GreyscaleAlpha = 2,
+	RGB            = 3,
+	RGBA           = 4,
+};
+
+INTERNAL GLint getGLFormat(i32 bytesPerPixel, b32 srgb)
+{
+	switch (bytesPerPixel)
+	{
+	case Greyscale:
+		return GL_LUMINANCE;
+	case GreyscaleAlpha:
+		return GL_LUMINANCE_ALPHA;
+	case RGB:
+		return (srgb ? GL_SRGB : GL_RGB);
+	case RGBA:
+		return (srgb ? GL_SRGB_ALPHA : GL_RGBA);
+	default:
+		// TODO(doyle): Invalid
+		// std::cout << "getGLFormat() invalid bytesPerPixel: "
+		//          << bytesPerPixel << std::endl;
+		return GL_LUMINANCE;
+	}
+}
+
+Texture genTexture(const GLuint width, const GLuint height,
+                   const GLint bytesPerPixel, const u8 *const image)
+{
+	// TODO(doyle): Let us set the parameters gl params as well
+	glCheckError();
+	Texture tex = {0};
+	tex.width  = width;
+	tex.height = height;
+	tex.internalFormat = GL_RGBA;
+	tex.wrapS = GL_REPEAT;
+	tex.wrapT = GL_REPEAT;
+	tex.filterMinification = GL_LINEAR;
+	tex.filterMagnification = GL_LINEAR;
+
+	glGenTextures(1, &tex.id);
+	glCheckError();
+
+
+	glBindTexture(GL_TEXTURE_2D, tex.id);
+	glCheckError();
+
+	/* Load image into texture */
+	// TODO(doyle) Figure out the gl format
+	tex.imageFormat = getGLFormat(bytesPerPixel, FALSE);
+	glCheckError();
+
+	glTexImage2D(GL_TEXTURE_2D, 0, tex.internalFormat, tex.width, tex.height, 0,
+	             tex.imageFormat, GL_UNSIGNED_BYTE, image);
+	glCheckError();
+	glActiveTexture(GL_TEXTURE0);
+	// TODO(doyle): Don't forget about thsi!
+	glTexSubImage2D(GL_TEXTURE_2D, 0, 3, 3, 55, 55, GL_RGBA, GL_UNSIGNED_BYTE,
+	                image);
+	glCheckError();
+	glGenerateMipmap(GL_TEXTURE_2D);
+
+	/* Set parameter of currently bound texture */
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, tex.wrapS);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, tex.wrapT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+	                tex.filterMinification);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
+	                tex.filterMagnification);
+	glCheckError();
+
+	/* Unbind and clean up */
+	glBindTexture(GL_TEXTURE_2D, 0);
+	glCheckError();
+
+	return tex;
+}