src/graphics moved to src/graphics/core

src/graphics/core/Texture.cpp

@@ -0,0 +1,82 @@
+#include "Texture.h"
+#include <GL/glew.h>
+#include <stdexcept>
+#include <memory>
+
+#include "ImageData.h"
+#include "gl_util.h"
+
+Texture::Texture(uint id, uint width, uint height) 
+    : id(id), width(width), height(height) {
+}
+
+Texture::Texture(ubyte* data, uint width, uint height, ImageFormat imageFormat) 
+    : width(width), height(height) {
+    glGenTextures(1, &id);
+    glBindTexture(GL_TEXTURE_2D, id);
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+    GLenum format = gl::to_gl_format(imageFormat);
+    glTexImage2D(
+        GL_TEXTURE_2D, 0, format, width, height, 0,
+        format, GL_UNSIGNED_BYTE, (GLvoid *) data
+    );
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glGenerateMipmap(GL_TEXTURE_2D);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1);
+    glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+Texture::~Texture() {
+    glDeleteTextures(1, &id);
+}
+
+void Texture::bind(){
+    glBindTexture(GL_TEXTURE_2D, id);
+}
+
+void Texture::unbind() {
+    glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+void Texture::reload(ubyte* data){
+    glBindTexture(GL_TEXTURE_2D, id);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
+        GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *) data);
+    glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+ImageData* Texture::readData() {
+    std::unique_ptr<ubyte[]> data (new ubyte[width * height * 4]);
+    glBindTexture(GL_TEXTURE_2D, id);
+    glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, data.get());
+    glBindTexture(GL_TEXTURE_2D, 0);
+    return new ImageData(ImageFormat::rgba8888, width, height, data.release());
+}
+
+void Texture::setNearestFilter() {
+    bind();
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+Texture* Texture::from(const ImageData* image) {
+    uint width = image->getWidth();
+    uint height = image->getHeight();
+    const void* data = image->getData();
+    return new Texture((ubyte*)data, width, height, image->getFormat());
+}
+
+uint Texture::getWidth() const {
+    return width;
+}
+
+uint Texture::getHeight() const {
+    return height;
+}
+
+uint Texture::getId() const {
+    return id;
+}