diff --git a/src/modules/graphics/graphics.c b/src/modules/graphics/graphics.c
index e07e9dc6..4f49ec5b 100644
--- a/src/modules/graphics/graphics.c
+++ b/src/modules/graphics/graphics.c
@@ -956,7 +956,7 @@ Buffer* lovrGraphicsGetBuffer(BufferInfo* info, void** data) {
   return buffer;
 }
 
-Buffer* lovrBufferCreate(BufferInfo* info, void** data) {
+Buffer* lovrBufferCreate(const BufferInfo* info, void** data) {
   uint32_t size = info->length * info->stride;
   lovrCheck(size > 0, "Buffer size can not be zero");
   lovrCheck(size <= 1 << 30, "Max buffer size is 1GB");
@@ -1048,7 +1048,7 @@ Texture* lovrGraphicsGetWindowTexture() {
   return state.window;
 }
 
-Texture* lovrTextureCreate(TextureInfo* info) {
+Texture* lovrTextureCreate(const TextureInfo* info) {
   uint32_t limits[] = {
     [TEXTURE_2D] = state.limits.textureSize2D,
     [TEXTURE_3D] = state.limits.textureSize3D,
@@ -1183,7 +1183,7 @@ Texture* lovrTextureCreate(TextureInfo* info) {
   return texture;
 }
 
-Texture* lovrTextureCreateView(TextureViewInfo* view) {
+Texture* lovrTextureCreateView(const TextureViewInfo* view) {
   const TextureInfo* info = &view->parent->info;
   uint32_t maxDepth = info->type == TEXTURE_3D ? MAX(info->depth >> view->levelIndex, 1) : info->depth;
   lovrCheck(!info->parent, "Can't nest texture views");
@@ -1262,7 +1262,7 @@ Sampler* lovrGraphicsGetDefaultSampler(FilterMode mode) {
   return state.defaultSamplers[mode];
 }
 
-Sampler* lovrSamplerCreate(SamplerInfo* info) {
+Sampler* lovrSamplerCreate(const SamplerInfo* info) {
   lovrCheck(info->range[1] < 0.f || info->range[1] >= info->range[0], "Invalid Sampler mipmap range");
   lovrCheck(info->anisotropy <= state.limits.anisotropy, "Sampler anisotropy (%f) exceeds anisotropy limit (%f)", info->anisotropy, state.limits.anisotropy);
 
@@ -1490,7 +1490,7 @@ Shader* lovrGraphicsGetDefaultShader(DefaultShader type) {
   return state.defaultShaders[type] = lovrShaderCreate(&info);
 }
 
-Shader* lovrShaderCreate(ShaderInfo* info) {
+Shader* lovrShaderCreate(const ShaderInfo* info) {
   Shader* shader = calloc(1, sizeof(Shader) + gpu_sizeof_shader());
   lovrAssert(shader, "Out of memory");
 
@@ -1786,7 +1786,7 @@ void lovrShaderGetLocalWorkgroupSize(Shader* shader, uint32_t size[3]) {
 
 // Material
 
-Material* lovrMaterialCreate(MaterialInfo* info) {
+Material* lovrMaterialCreate(const MaterialInfo* info) {
   MaterialBlock* block = &state.materialBlocks.data[state.materialBlock];
 
   if (!block || block->head == ~0u || !gpu_finished(block->list[block->head].tick)) {
@@ -1919,7 +1919,7 @@ const MaterialInfo* lovrMaterialGetInfo(Material* material) {
 
 // Font
 
-Font* lovrFontCreate(FontInfo* info) {
+Font* lovrFontCreate(const FontInfo* info) {
   Font* font = calloc(1, sizeof(Font));
   lovrAssert(font, "Out of memory");
   font->ref = 1;
@@ -2262,7 +2262,7 @@ void lovrFontGetLines(Font* font, ColoredString* strings, uint32_t count, float
 
 // Model
 
-Model* lovrModelCreate(ModelInfo* info) {
+Model* lovrModelCreate(const ModelInfo* info) {
   ModelData* data = info->data;
   Model* model = calloc(1, sizeof(Model));
   lovrAssert(model, "Out of memory");
@@ -2701,9 +2701,15 @@ static void lovrModelReskin(Model* model) {
   state.hasReskin = true;
 }
 
+// Readback
+
+Readback* lovrReadbackCreate(const ReadbackInfo* info) {
+
+}
+
 // Tally
 
-Tally* lovrTallyCreate(TallyInfo* info) {
+Tally* lovrTallyCreate(const TallyInfo* info) {
   lovrCheck(info->count > 0, "Tally count must be greater than zero");
   lovrCheck(info->count <= 4096, "Maximum Tally count is 4096");
   lovrCheck(info->views <= state.limits.renderSize[2], "Tally view count can not exceed the maximum view count");
diff --git a/src/modules/graphics/graphics.h b/src/modules/graphics/graphics.h
index 626884ed..1bea3684 100644
--- a/src/modules/graphics/graphics.h
+++ b/src/modules/graphics/graphics.h
@@ -166,7 +166,7 @@ typedef struct {
 } BufferInfo;
 
 Buffer* lovrGraphicsGetBuffer(BufferInfo* info, void** data);
-Buffer* lovrBufferCreate(BufferInfo* info, void** data);
+Buffer* lovrBufferCreate(const BufferInfo* info, void** data);
 void lovrBufferDestroy(void* ref);
 const BufferInfo* lovrBufferGetInfo(Buffer* buffer);
 bool lovrBufferIsTemporary(Buffer* buffer);
@@ -216,8 +216,8 @@ typedef struct {
 } TextureInfo;
 
 Texture* lovrGraphicsGetWindowTexture(void);
-Texture* lovrTextureCreate(TextureInfo* info);
-Texture* lovrTextureCreateView(TextureViewInfo* view);
+Texture* lovrTextureCreate(const TextureInfo* info);
+Texture* lovrTextureCreateView(const TextureViewInfo* view);
 void lovrTextureDestroy(void* ref);
 const TextureInfo* lovrTextureGetInfo(Texture* texture);
 
@@ -253,7 +253,7 @@ typedef struct {
 } SamplerInfo;
 
 Sampler* lovrGraphicsGetDefaultSampler(FilterMode mode);
-Sampler* lovrSamplerCreate(SamplerInfo* info);
+Sampler* lovrSamplerCreate(const SamplerInfo* info);
 void lovrSamplerDestroy(void* ref);
 const SamplerInfo* lovrSamplerGetInfo(Sampler* sampler);
 
@@ -300,7 +300,7 @@ typedef struct {
 
 ShaderSource lovrGraphicsCompileShader(ShaderStage stage, ShaderSource* source);
 Shader* lovrGraphicsGetDefaultShader(DefaultShader type);
-Shader* lovrShaderCreate(ShaderInfo* info);
+Shader* lovrShaderCreate(const ShaderInfo* info);
 Shader* lovrShaderClone(Shader* parent, ShaderFlag* flags, uint32_t count);
 void lovrShaderDestroy(void* ref);
 const ShaderInfo* lovrShaderGetInfo(Shader* shader);
@@ -338,7 +338,7 @@ typedef struct {
   Texture* normalTexture;
 } MaterialInfo;
 
-Material* lovrMaterialCreate(MaterialInfo* info);
+Material* lovrMaterialCreate(const MaterialInfo* info);
 void lovrMaterialDestroy(void* ref);
 const MaterialInfo* lovrMaterialGetInfo(Material* material);
 
@@ -373,7 +373,7 @@ typedef struct {
   struct { uint8_t r, g, b, a; } color;
 } GlyphVertex;
 
-Font* lovrFontCreate(FontInfo* info);
+Font* lovrFontCreate(const FontInfo* info);
 void lovrFontDestroy(void* ref);
 const FontInfo* lovrFontGetInfo(Font* font);
 float lovrFontGetPixelDensity(Font* font);
@@ -412,7 +412,7 @@ typedef struct {
   bool indexed;
 } ModelDraw;
 
-Model* lovrModelCreate(ModelInfo* info);
+Model* lovrModelCreate(const ModelInfo* info);
 void lovrModelDestroy(void* ref);
 const ModelInfo* lovrModelGetInfo(Model* model);
 uint32_t lovrModelGetNodeDrawCount(Model* model, uint32_t node);
@@ -440,7 +440,7 @@ typedef struct {
   uint32_t views;
 } TallyInfo;
 
-Tally* lovrTallyCreate(TallyInfo* info);
+Tally* lovrTallyCreate(const TallyInfo* info);
 void lovrTallyDestroy(void* ref);
 const TallyInfo* lovrTallyGetInfo(Tally* tally);