GL-related refactor

src/assets/assetload_funcs.cpp

@@ -136,7 +136,7 @@ bool assetload::font(
         }
         pages.push_back(std::move(texture));
     }
-    int res = pages[0]->height / 16;
+    int res = pages[0]->getHeight() / 16;
     assets->store(new Font(std::move(pages), res, 4), name);
     return true;
 }
@@ -270,13 +270,19 @@ static bool animation(
         Frame frame;
         UVRegion region = dstAtlas->get(name);
 
-        frame.dstPos = glm::ivec2(region.u1 * dstTex->width, region.v1 * dstTex->height);
+        uint dstWidth = dstTex->getWidth();
-        frame.size = glm::ivec2(region.u2 * dstTex->width, region.v2 * dstTex->height) - frame.dstPos;
+        uint dstHeight = dstTex->getHeight();
+
+        uint srcWidth = srcTex->getWidth();
+        uint srcHeight = srcTex->getHeight();
+
+        frame.dstPos = glm::ivec2(region.u1 * dstWidth, region.v1 * dstHeight);
+        frame.size = glm::ivec2(region.u2 * dstWidth, region.v2 * dstHeight) - frame.dstPos;
 
         if (frameList.empty()) {
             for (const auto& elem : builder.getNames()) {
                 region = srcAtlas->get(elem);
-                frame.srcPos = glm::ivec2(region.u1 * srcTex->width, srcTex->height - region.v2 * srcTex->height);
+                frame.srcPos = glm::ivec2(region.u1 * srcWidth, srcHeight - region.v2 * srcHeight);
                 animation.addFrame(frame);
             }
         }
@@ -288,7 +294,7 @@ static bool animation(
                 }
                 region = srcAtlas->get(elem.first);
                 frame.duration = elem.second;
-                frame.srcPos = glm::ivec2(region.u1 * srcTex->width, srcTex->height - region.v2 * srcTex->height);
+                frame.srcPos = glm::ivec2(region.u1 * srcWidth, srcHeight - region.v2 * srcHeight);
                 animation.addFrame(frame);
             }
         }

src/frontend/BlocksPreview.cpp

@@ -95,7 +95,7 @@ ImageData* BlocksPreview::draw(
             break;
         }
     }
-    return fbo->texture->readData();
+    return fbo->getTexture()->readData();
 }
 
 std::unique_ptr<Atlas> BlocksPreview::build(
@@ -113,8 +113,8 @@ std::unique_ptr<Atlas> BlocksPreview::build(
     Viewport viewport(iconSize, iconSize);
     GfxContext pctx(nullptr, viewport, nullptr);
     GfxContext ctx = pctx.sub();
-    ctx.cullFace(true);
+    ctx.setCullFace(true);
-    ctx.depthTest(true);
+    ctx.setDepthTest(true);
 
     Framebuffer fbo(iconSize, iconSize, true);
     Batch3D batch(1024);

src/frontend/WorldRenderer.cpp

@@ -159,8 +159,8 @@ void WorldRenderer::draw(const GfxContext& pctx, Camera* camera, bool hudVisible
     Shader* linesShader = assets->getShader("lines");
     {
         GfxContext ctx = pctx.sub();
-        ctx.depthTest(true);
+        ctx.setDepthTest(true);
-        ctx.cullFace(true);
+        ctx.setCullFace(true);
 
         float fogFactor = 15.0f / ((float)settings.chunks.loadDistance-2);
 
@@ -224,7 +224,7 @@ void WorldRenderer::draw(const GfxContext& pctx, Camera* camera, bool hudVisible
 
     if (hudVisible && player->debug) {
         GfxContext ctx = pctx.sub();
-        ctx.depthTest(true);
+        ctx.setDepthTest(true);
 
         linesShader->use();
 
@@ -248,14 +248,14 @@ void WorldRenderer::draw(const GfxContext& pctx, Camera* camera, bool hudVisible
                 0.f, (float)displayHeight,
                 -length, length) * model * glm::inverse(camera->rotation));
 
-        ctx.depthTest(false);
+        ctx.setDepthTest(false);
         lineBatch->lineWidth(4.0f);
         lineBatch->line(0.f, 0.f, 0.f, length, 0.f, 0.f, 0.f, 0.f, 0.f, 1.f);
         lineBatch->line(0.f, 0.f, 0.f, 0.f, length, 0.f, 0.f, 0.f, 0.f, 1.f);
         lineBatch->line(0.f, 0.f, 0.f, 0.f, 0.f, length, 0.f, 0.f, 0.f, 1.f);
         lineBatch->render();
 
-        ctx.depthTest(true);
+        ctx.setDepthTest(true);
         lineBatch->lineWidth(2.0f);
         lineBatch->line(0.f, 0.f, 0.f, length, 0.f, 0.f, 1.f, 0.f, 0.f, 1.f);
         lineBatch->line(0.f, 0.f, 0.f, 0.f, length, 0.f, 0.f, 1.f, 0.f, 1.f);

src/frontend/graphics/Skybox.cpp

@@ -8,6 +8,8 @@
 #include "../../graphics/Shader.h"
 #include "../../graphics/Mesh.h"
 #include "../../graphics/Batch3D.h"
+#include "../../graphics/Texture.h"
+#include "../../graphics/Framebuffer.h"
 #include "../../window/Window.h"
 #include "../../window/Camera.h"
 
@@ -19,9 +21,9 @@ const int STARS_COUNT = 3000;
 const int STARS_SEED = 632;
 
 Skybox::Skybox(uint size, Shader* shader) 
-    : size(size), 
+  : size(size), 
-      shader(shader), 
+    shader(shader), 
-      batch3d(new Batch3D(4096)) 
+    batch3d(std::make_unique<Batch3D>(4096)) 
 {
     glGenTextures(1, &cubemap);
     glBindTexture(GL_TEXTURE_CUBE_MAP, cubemap);
@@ -33,7 +35,10 @@ Skybox::Skybox(uint size, Shader* shader)
     for (uint face = 0; face < 6; face++) {
         glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, 0, GL_RGB, size, size, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
     }
-    glGenFramebuffers(1, &fbo);
+
+    uint fboid;
+    glGenFramebuffers(1, &fboid);
+    fbo = std::make_unique<Framebuffer>(fboid, 0, (std::unique_ptr<Texture>)nullptr);
 
     float vertices[] {
         -1.0f, -1.0f, -1.0f, 1.0f, 1.0f, 1.0f,
@@ -59,7 +64,6 @@ Skybox::Skybox(uint size, Shader* shader)
 
 Skybox::~Skybox() {
     glDeleteTextures(1, &cubemap);
-    glDeleteFramebuffers(1, &fbo);
 }
 
 void Skybox::drawBackground(Camera* camera, Assets* assets, int width, int height) {
@@ -109,7 +113,7 @@ void Skybox::draw(
     drawBackground(camera, assets, width, height);
 
     GfxContext ctx = pctx.sub();
-    ctx.blendMode(blendmode::addition);
+    ctx.setBlendMode(blendmode::addition);
 
     Shader* shader = assets->getShader("ui3d");
     shader->use();
@@ -141,15 +145,15 @@ void Skybox::draw(
 
 void Skybox::refresh(const GfxContext& pctx, float t, float mie, uint quality) {
     GfxContext ctx = pctx.sub();
-    ctx.depthMask(false);
+    ctx.setDepthMask(false);
-    ctx.depthTest(false);
+    ctx.setDepthTest(false);
+    ctx.setFramebuffer(fbo.get());
+    ctx.setViewport(Viewport(size, size));
 
     ready = true;
-    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
     glActiveTexture(GL_TEXTURE1);
     glBindTexture(GL_TEXTURE_CUBE_MAP, cubemap);
     shader->use();
-    Window::viewport(0,0, size, size);
 
     const glm::vec3 xaxs[] = {
         {0.0f, 0.0f, -1.0f},
@@ -194,8 +198,6 @@ void Skybox::refresh(const GfxContext& pctx, float t, float mie, uint quality) {
     }
     glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
     glActiveTexture(GL_TEXTURE0);
-    glBindFramebuffer(GL_FRAMEBUFFER, 0);
-    Window::viewport(0, 0, Window::width, Window::height);
 }
 
 void Skybox::bind() const {

src/frontend/graphics/Skybox.h

@@ -13,6 +13,7 @@ class Shader;
 class Assets;
 class Camera;
 class Batch3D;
+class Framebuffer;
 
 struct skysprite {
     std::string texture;
@@ -22,7 +23,7 @@ struct skysprite {
 };
 
 class Skybox {
-    uint fbo;
+    std::unique_ptr<Framebuffer> fbo;
     uint cubemap;
     uint size;
     Shader* shader;
@@ -44,7 +45,8 @@ public:
         Camera* camera, 
         Assets* assets, 
         float daytime,
-        float fog);
+        float fog
+    );
 
     void refresh(const GfxContext& pctx, float t, float mie, uint quality);
     void bind() const;

src/frontend/gui/containers.cpp

@@ -88,12 +88,11 @@ void Container::draw(const GfxContext* pctx, Assets* assets) {
     batch->flush();
     {
         GfxContext ctx = pctx->sub();
-        ctx.scissors(glm::vec4(pos.x, pos.y, size.x, size.y));
+        ctx.setScissors(glm::vec4(pos.x, pos.y, size.x, size.y));
         for (auto node : nodes) {
             if (node->isVisible())
                 node->draw(pctx, assets);
         }
-        batch->flush();
     }
 }
 

src/frontend/gui/controls.cpp

@@ -204,7 +204,7 @@ void Image::draw(const GfxContext* pctx, Assets* assets) {
     
     auto texture = assets->getTexture(this->texture);
     if (texture && autoresize) {
-        setSize(glm::vec2(texture->width, texture->height));
+        setSize(glm::vec2(texture->getWidth(), texture->getHeight()));
     }
     batch->texture(texture);
     batch->setColor(color);
@@ -383,7 +383,7 @@ void TextBox::draw(const GfxContext* pctx, Assets* assets) {
     glm::vec2 size = getSize();
 
     auto subctx = pctx->sub();
-    subctx.scissors(glm::vec4(pos.x, pos.y, size.x, size.y));
+    subctx.setScissors(glm::vec4(pos.x, pos.y, size.x, size.y));
 
     const int lineHeight = font->getLineHeight() * label->getLineInterval();
     glm::vec2 lcoord = label->calcPos();
@@ -418,7 +418,6 @@ void TextBox::draw(const GfxContext* pctx, Assets* assets) {
             batch->rect(lcoord.x, lcoord.y+label->getLineYOffset(endLine), end, lineHeight);
         }
     }
-    batch->flush();
 }
 
 void TextBox::drawBackground(const GfxContext* pctx, Assets* assets) {

src/frontend/hud.cpp

@@ -481,18 +481,16 @@ void Hud::draw(const GfxContext& ctx){
     // Crosshair
     if (!pause && !inventoryOpen && !player->debug) {
         GfxContext chctx = ctx.sub();
-        chctx.blendMode(blendmode::inversion);
+        chctx.setBlendMode(blendmode::inversion);
         auto texture = assets->getTexture("gui/crosshair");
         batch->texture(texture);
-        int chsizex = texture != nullptr ? texture->width : 16;
+        int chsizex = texture != nullptr ? texture->getWidth() : 16;
-        int chsizey = texture != nullptr ? texture->height : 16;
+        int chsizey = texture != nullptr ? texture->getHeight() : 16;
         batch->rect(
             (width-chsizex)/2, (height-chsizey)/2, 
             chsizex, chsizey, 0,0, 1,1, 1,1,1,1
         );
-        batch->flush();
     }
-    batch->flush();
 }
 
 void Hud::updateElementsPosition(const Viewport& viewport) {

src/graphics/Framebuffer.cpp

@@ -3,38 +3,66 @@
 #include <GL/glew.h>
 #include "Texture.h"
 
+Framebuffer::Framebuffer(uint fbo, uint depth, std::unique_ptr<Texture> texture)
+  : fbo(fbo), depth(depth), texture(std::move(texture)) 
+{
+    if (texture) {
+        width = texture->getWidth();
+        height = texture->getHeight();
+    } else {
+        width = 0;
+        height = 0;
+    }
+} 
+
 Framebuffer::Framebuffer(uint width, uint height, bool alpha) 
-    : width(width), height(height) {
+  : width(width), height(height)
-	glGenFramebuffers(1, &fbo);
+{
-	bind();
+    glGenFramebuffers(1, &fbo);
-	GLuint tex;
+    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
-	glGenTextures(1, &tex);
+
-	glBindTexture(GL_TEXTURE_2D, tex);
+    // Setup color attachment (texture)
+    GLuint tex;
     GLuint format = alpha ? GL_RGBA : GL_RGB;
-	glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, nullptr);
+    glGenTextures(1, &tex);
+    glBindTexture(GL_TEXTURE_2D, tex);
+    glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, nullptr);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex, 0);
-    texture = new Texture(tex, width, height);
+    texture = std::make_unique<Texture>(tex, width, height);
+    
+    // Setup depth attachment
     glGenRenderbuffers(1, &depth);
     glBindRenderbuffer(GL_RENDERBUFFER, depth);
     glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height);
     glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth);
-    unbind();
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 
 Framebuffer::~Framebuffer() {
-	delete texture;
+    glDeleteFramebuffers(1, &fbo);
-	glDeleteFramebuffers(1, &fbo);
     glDeleteRenderbuffers(1, &depth);
 }
 
 void Framebuffer::bind() {
-	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 }
 
 void Framebuffer::unbind() {
-	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
+Texture* Framebuffer::getTexture() const {
+    return texture.get();
+}
+
+uint Framebuffer::getWidth() const {
+    return width;
+}
+
+uint Framebuffer::getHeight() const {
+    return height;
 }

src/graphics/Framebuffer.h

@@ -3,20 +3,27 @@
 
 #include "../typedefs.h"
 
+#include <memory>
+
 class Texture;
 
 class Framebuffer {
 	uint fbo;
 	uint depth;
-public:
 	uint width;
 	uint height;
-	Texture* texture;
+	std::unique_ptr<Texture> texture;
+public:
+	Framebuffer(uint fbo, uint depth, std::unique_ptr<Texture> texture);
 	Framebuffer(uint width, uint height, bool alpha=false);
 	~Framebuffer();
 
 	void bind();
 	void unbind();
+
+	Texture* getTexture() const;
+	uint getWidth() const;
+	uint getHeight() const;
 };
 
 #endif /* SRC_GRAPHICS_FRAMEBUFFER_H_ */

src/graphics/GfxContext.cpp

@@ -3,10 +3,16 @@
 #include <GL/glew.h>
 
 #include "Batch2D.h"
+#include "Framebuffer.h"
 
-GfxContext::GfxContext(const GfxContext* parent, Viewport& viewport, Batch2D* g2d)
+GfxContext::GfxContext(
-    : parent(parent), viewport(viewport), g2d(g2d) {
+    const GfxContext* parent, 
-}
+    const Viewport& viewport, 
+    Batch2D* g2d
+) : parent(parent), 
+    viewport(viewport), 
+    g2d(g2d) 
+{}
 
 GfxContext::~GfxContext() {
     while (scissorsCount--) {
@@ -16,19 +22,38 @@ GfxContext::~GfxContext() {
     if (parent == nullptr)
         return;
     
-    if (depthMask_ != parent->depthMask_) {
+    if (g2d) {
-        glDepthMask(parent->depthMask_);
+        g2d->flush();
     }
-    if (depthTest_ != parent->depthTest_) {
+
-        if (depthTest_) glDisable(GL_DEPTH_TEST);
+    if (fbo != parent->fbo) {
+        if (fbo) {
+            fbo->unbind();
+        }
+        if (parent->fbo) {
+            fbo->bind();
+        }
+    }
+
+    Window::viewport(
+        0, 0,
+        parent->viewport.getWidth(), 
+        parent->viewport.getHeight()
+    );
+
+    if (depthMask != parent->depthMask) {
+        glDepthMask(parent->depthMask);
+    }
+    if (depthTest != parent->depthTest) {
+        if (depthTest) glDisable(GL_DEPTH_TEST);
         else glEnable(GL_DEPTH_TEST);
     }
-    if (cullFace_ != parent->cullFace_) {
+    if (cullFace != parent->cullFace) {
-        if (cullFace_) glDisable(GL_CULL_FACE);
+        if (cullFace) glDisable(GL_CULL_FACE);
         else glEnable(GL_CULL_FACE);
     }
-    if (blendMode_ != parent->blendMode_) {
+    if (blendMode != parent->blendMode) {
-        Window::setBlendMode(parent->blendMode_);
+        Window::setBlendMode(parent->blendMode);
     }
 }
 
@@ -42,22 +67,40 @@ Batch2D* GfxContext::getBatch2D() const {
 
 GfxContext GfxContext::sub() const {
     auto ctx = GfxContext(this, viewport, g2d);
-    ctx.depthTest_ = depthTest_;
+    ctx.depthTest = depthTest;
-    ctx.cullFace_ = cullFace_;
+    ctx.cullFace = cullFace;
     return ctx;
 }
 
-void GfxContext::depthMask(bool flag) {
+void GfxContext::setViewport(const Viewport& viewport) {
-    if (depthMask_ == flag)
+    this->viewport = viewport;
+    Window::viewport(
+        0, 0,
+        viewport.getWidth(),
+        viewport.getHeight()
+    );
+}
+
+void GfxContext::setFramebuffer(Framebuffer* fbo) {
+    if (this->fbo == fbo)
         return;
-    depthMask_ = flag;
+    this->fbo = fbo;
+    if (fbo) {
+        fbo->bind();
+    }
+}
+
+void GfxContext::setDepthMask(bool flag) {
+    if (depthMask == flag)
+        return;
+    depthMask = flag;
     glDepthMask(GL_FALSE + flag);
 }
 
-void GfxContext::depthTest(bool flag) {
+void GfxContext::setDepthTest(bool flag) {
-    if (depthTest_ == flag)
+    if (depthTest == flag)
         return;
-    depthTest_ = flag;
+    depthTest = flag;
     if (flag) {
         glEnable(GL_DEPTH_TEST);
     } else {
@@ -65,10 +108,10 @@ void GfxContext::depthTest(bool flag) {
     }
 }
 
-void GfxContext::cullFace(bool flag) {
+void GfxContext::setCullFace(bool flag) {
-    if (cullFace_ == flag)
+    if (cullFace == flag)
         return;
-    cullFace_ = flag;
+    cullFace = flag;
     if (flag) {
         glEnable(GL_CULL_FACE);
     } else {
@@ -76,14 +119,14 @@ void GfxContext::cullFace(bool flag) {
     }
 }
 
-void GfxContext::blendMode(blendmode mode) {
+void GfxContext::setBlendMode(blendmode mode) {
-    if (blendMode_ == mode)
+    if (blendMode == mode)
         return;
-    blendMode_ = mode;
+    blendMode = mode;
     Window::setBlendMode(mode);
 }
 
-void GfxContext::scissors(glm::vec4 area) {
+void GfxContext::setScissors(glm::vec4 area) {
     Window::pushScissor(area);
     scissorsCount++;
 }

src/graphics/GfxContext.h

@@ -6,29 +6,33 @@
 #include "../window/Window.h"
 
 class Batch2D;
+class Framebuffer;
 
 class GfxContext {
     const GfxContext* parent;
-    Viewport& viewport;
+    Viewport viewport;
     Batch2D* const g2d;
-    bool depthMask_ = true;
+    Framebuffer* fbo = nullptr;
-    bool depthTest_ = false;
+    bool depthMask = true;
-    bool cullFace_ = false;
+    bool depthTest = false;
-    blendmode blendMode_ = blendmode::normal;
+    bool cullFace = false;
+    blendmode blendMode = blendmode::normal;
     int scissorsCount = 0;
 public:
-    GfxContext(const GfxContext* parent, Viewport& viewport, Batch2D* g2d);
+    GfxContext(const GfxContext* parent, const Viewport& viewport, Batch2D* g2d);
     ~GfxContext();
     
     Batch2D* getBatch2D() const;
     const Viewport& getViewport() const;
     GfxContext sub() const;
 
-    void depthMask(bool flag);
+    void setViewport(const Viewport& viewport);
-    void depthTest(bool flag);
+    void setFramebuffer(Framebuffer* fbo);
-    void cullFace(bool flag);
+    void setDepthMask(bool flag);
-    void blendMode(blendmode mode);
+    void setDepthTest(bool flag);
-    void scissors(glm::vec4 area);
+    void setCullFace(bool flag);
+    void setBlendMode(blendmode mode);
+    void setScissors(glm::vec4 area);
 };
 
 #endif // GRAPHICS_GFX_CONTEXT_H_

src/graphics/Shader.h

@@ -3,13 +3,14 @@
 
 #include <string>
 #include <glm/glm.hpp>
+#include "../typedefs.h"
 
 class GLSLExtension;
 
 class Shader {
+    uint id;
 public:
     static GLSLExtension* preprocessor;
-    unsigned int id;
 
     Shader(unsigned int id);
     ~Shader();

src/graphics/Texture.cpp

@@ -5,17 +5,19 @@
 
 #include "ImageData.h"
 
-Texture::Texture(uint id, int width, int height) 
+Texture::Texture(uint id, uint width, uint height) 
     : id(id), width(width), height(height) {
 }
 
-Texture::Texture(ubyte* data, int width, int height, uint format) 
+Texture::Texture(ubyte* data, uint width, uint height, uint format) 
     : width(width), height(height) {
     glGenTextures(1, &id);
     glBindTexture(GL_TEXTURE_2D, id);
     glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-    glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0,
+    glTexImage2D(
-        format, GL_UNSIGNED_BYTE, (GLvoid *) data);
+        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);
@@ -66,3 +68,15 @@ Texture* Texture::from(const ImageData* image) {
     }
     return new Texture((ubyte*)data, width, height, format);
 }
+
+uint Texture::getWidth() const {
+    return width;
+}
+
+uint Texture::getHeight() const {
+    return height;
+}
+
+uint Texture::getId() const {
+    return id;
+}

src/graphics/Texture.h

@@ -7,20 +7,26 @@
 class ImageData;
 
 class Texture {
-public:
+protected:
     uint id;
-    int width;
+    uint width;
-    int height;
+    uint height;
-    Texture(uint id, int width, int height);
+public:
-    Texture(ubyte* data, int width, int height, uint format);
+    Texture(uint id, uint width, uint height);
-    ~Texture();
+    Texture(ubyte* data, uint width, uint height, uint format);
+    virtual ~Texture();
 
-    void bind();
+    virtual void bind();
-    void reload(ubyte* data);
+    virtual void reload(ubyte* data);
 
     void setNearestFilter();
 
-    ImageData* readData();
+    virtual ImageData* readData();
+
+    virtual uint getWidth() const;
+    virtual uint getHeight() const;
+
+    virtual uint getId() const;
 
     static Texture* from(const ImageData* image);
 };

src/graphics/TextureAnimation.cpp

@@ -35,19 +35,23 @@ void TextureAnimator::update(float delta) {
             frame = elem.frames[elem.currentFrame];
         }
         if (frameNum != elem.currentFrame){
-            if (changedTextures.find(elem.dstTexture->id) == changedTextures.end()) changedTextures.insert(elem.dstTexture->id);
+            uint elemDstId = elem.dstTexture->getId();
+            uint elemSrcId = elem.srcTexture->getId();
+
+            if (changedTextures.find(elemDstId) == changedTextures.end()) 
+                changedTextures.insert(elemDstId);
 
             glBindFramebuffer(GL_FRAMEBUFFER, fboD);
-            glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, elem.dstTexture->id, 0);
+            glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, elemDstId, 0);
 
             glBindFramebuffer(GL_FRAMEBUFFER, fboR);
-            glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, elem.srcTexture->id, 0);
+            glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, elemSrcId, 0);
             glBindFramebuffer(GL_FRAMEBUFFER, 0);
 
             glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fboD);
             glBindFramebuffer(GL_READ_FRAMEBUFFER, fboR);
 
-            float srcPosY = elem.srcTexture->height - frame.size.y - frame.srcPos.y; // vertical flip
+            float srcPosY = elem.srcTexture->getHeight() - frame.size.y - frame.srcPos.y; // vertical flip
 
             // Extensions
             const int ext = 2;