Got GPU rendering of rects working

client/include/command.h

@@ -14,6 +14,8 @@ VkCommandBuffer command_begin_single(VkDevice device, VkCommandPool transfer_poo
 
 VkResult command_end_single(VkDevice device, VkCommandBuffer command_buffer, VkCommandPool transfer_pool, Queue transfer_queue);
 
+void command_copy_buffer(VkCommandBuffer command_buffer, VkBuffer src, VkBuffer dst, VkDeviceSize src_offset, VkDeviceSize dst_offset, VkDeviceSize size);
+
 VkResult command_transition_image_layout(VkDevice device, VkCommandPool transfer_pool, Queue transfer_queue, VkImageLayout old_layout, VkImageLayout new_layout, VkImage image, VkAccessFlags src_mask, VkAccessFlags dst_mask, VkPipelineStageFlags source, VkPipelineStageFlags dest, uint32_t source_family, uint32_t dest_family, VkImageAspectFlags aspect_flags);
 
 #endif

client/include/render.h

@@ -27,6 +27,13 @@
 #include "ui.h"
 #include "command.h"
 
+#define VK_RESULT(x) {\
+ result = x;\
+ if(result != VK_SUCCESS) {\
+    return x;\
+ }\
+}
+
 extern const uint32_t MAX_FRAMES_IN_FLIGHT;
 
 typedef struct SwapchainDetailsStruct {
@@ -97,10 +104,26 @@ VkResult draw_frame(
     uint32_t ui_layer_count);
 
 VkResult create_transfer_buffer(
-    VkDeviceSize size,
     VmaAllocator allocator,
+    VkDeviceSize size,
     VkBuffer* buffer,
     VmaAllocation* memory,
     void** mapped);
 
+void destroy_transfer_buffer(
+    VmaAllocator allocator,
+    VkBuffer buffer,
+    VmaAllocation memory);
+
+VkResult create_storage_buffer(
+    VmaAllocator allocator,
+    VkBufferUsageFlags usage,
+    VkDeviceSize size,
+    VkBuffer* buffer,
+    VmaAllocation* memory);
+
+VkDeviceAddress buffer_address(
+    VkDevice device,
+    VkBuffer buffer);
+
 #endif

client/include/ui.h

@@ -19,22 +19,6 @@ typedef struct GraphicsPipelineStruct {
   VkPipeline             pipeline;
 } GraphicsPipeline;
 
-typedef struct UIRectStruct {
-  vec3 pos;
-  float pad0;
-  vec2 size;
-  vec4 color;
-} UIRect;
-
-typedef struct StringStruct {
-  vec3 pos;
-  float pad0;
-  vec4 color;
-  float size;
-  uint32_t offset;
-  uint32_t length;
-} String;
-
 typedef struct DrawCommandStruct {
   uint32_t vertex_count;
   uint32_t instance_count;
@@ -48,14 +32,6 @@ typedef struct DispatchCommandStruct {
   uint32_t z;
 } DispatchCommand;
 
-typedef struct CharacterStruct {
-  vec3     pos;
-  float    pad0;
-  vec4     color;
-  float    size;
-  uint32_t code;
-} Character;
-
 typedef struct FontStruct {
   uint32_t num_symbols;
   uint32_t width;
@@ -78,33 +54,42 @@ typedef struct FontStorageStruct {
   VkImage       image;
   VkImageView   view;
   VkSampler     sampler;
+  uint32_t*     charmap;
+  uint32_t      num_symbols;
   uint32_t      index;
 } FontStorage;
 
-typedef struct TextPointersMemoryStruct {
+typedef struct UIRectStruct {
-  VmaAllocation pointers_memory;
+  vec2 pos;
-  VmaAllocation draw_memory;
+  vec2 size;
-  VmaAllocation strings_memory;
+  vec4 color;
-  VmaAllocation codes_memory;
+} UIRect;
-  VmaAllocation characters_memory;
 
-  VkBuffer pointers_buffer;
+typedef struct UIStringStruct {
-  VkBuffer draw_buffer;
+  vec2 pos;
-  VkBuffer strings_buffer;
+  vec4 color;
-  VkBuffer codes_buffer;
+  float size;
-  VkBuffer characters_buffer;
+  uint32_t offset;
-} TextPointersMemory;
+  uint32_t length;
+} UIString;
+
+typedef struct UIGlyphStruct {
+  vec2     pos;
+  vec4     color;
+  float    size;
+  uint32_t code;
+} UIGlyph;
 
 typedef struct UIlayerStorageStruct {
   VkBuffer        strings;
-  VkBuffer        chars;
+  VkBuffer        glyphs;
   VkBuffer        codes;
   VkBuffer        rects; 
   VkBuffer        layer;
 
   VmaAllocation strings_memory;
   VmaAllocation rects_memory;
-  VmaAllocation chars_memory;
+  VmaAllocation glyphs_memory;
   VmaAllocation codes_memory;
   VmaAllocation layer_memory;
 
@@ -112,13 +97,13 @@ typedef struct UIlayerStorageStruct {
 } UILayerStorage;
 
 typedef struct UILayerStruct {
-  VkDeviceAddress rects;
-  uint32_t        rect_count;
-
   VkDeviceAddress strings;
-  uint32_t        font_index;
+  VkDeviceAddress codes;
 
-  DrawCommand     draw_chars;
+  VkDeviceAddress rects;
+  VkDeviceAddress glyphs;
+
+  DrawCommand     draw_glyphs;
   DrawCommand     draw_rects;
   DispatchCommand dispatch_strings;
 } UILayer;
@@ -152,6 +137,11 @@ VkResult create_ui_context(
     VkDevice device,
     VmaAllocator allocator,
     VkRenderPass render_pass,
+    uint32_t max_fonts,
+    VkExtent2D swapchain_extent,
+    vec2 window_scale,
+    VkCommandPool transfer_pool,
+    Queue transfer_queue,
     UIContextStorage* memory);
 
 VkResult load_font(
@@ -167,7 +157,6 @@ VkResult load_font(
     const char* ttf_file,
     uint32_t size,
     VkBool32 antialias,
-    uint32_t** charmap,
     FontStorage* memory);
 
 VkResult create_layer(
@@ -178,6 +167,5 @@ VkResult create_layer(
     VmaAllocator allocator,
     VkCommandPool transfer_pool,
     Queue transfer_queue,
-    UILayerStorage* memory,
+    UILayerStorage* memory);
-    VkDeviceAddress* address);
 #endif

client/shader_src/ui_rect.vert

@@ -1,8 +1,30 @@
 #version 450
 #extension GL_EXT_buffer_reference : require
 
+struct String {
+  vec2 pos;
+  vec4 color;
+  float size;
+  uint code;
+};
+
+layout(std430, buffer_reference) readonly buffer StringList {
+  String s[];
+};
+
+struct Glyph {
+  vec2 pos;
+  vec4 color;
+  float size;
+  uint code;
+};
+
+layout(std430, buffer_reference) readonly buffer GlyphList {
+  Glyph g[];
+};
+
 struct Rect {
-  vec3 pos;
+  vec2 pos;
   vec2 size;
   vec4 color;
 };
@@ -11,13 +33,69 @@ layout(std430, buffer_reference) readonly buffer RectList {
   Rect r[];
 };
 
-layout(std430, buffer_reference) readonly buffer ScreenInfo {
+layout(std430, buffer_reference) readonly buffer CodeList {
-  mat4 bounds;
+  uint c[];
 };
 
-layout(std430, push_constant) uniform PushConstant {
+struct DrawCommand {
-  ScreenInfo screen;
+  uint vertex_count;
+  uint instance_count;
+  uint fist_vertex;
+  uint first_instance;
+};
+
+struct DispatchCommand {
+  uint x;
+  uint y;
+  uint z;
+};
+
+layout(std430, buffer_reference) buffer UILayer {
+  StringList strings;
+  CodeList codes;
+
   RectList rects;
+  GlyphList glyphs;
+
+  DrawCommand draw_glyphs;
+  DrawCommand draw_rects;
+
+  DispatchCommand dispatch_strings;
+};
+
+struct Symbol {
+  int top;
+  uint left;
+  uint width;
+  uint height;
+  uint advance;
+};
+
+layout(std430, buffer_reference) buffer SymbolList {
+  Symbol s[];
+};
+
+
+struct Font {
+  uint num_symbols;
+  uint width;
+  uint height;
+  SymbolList symbols;
+};
+
+
+layout(std430, buffer_reference) buffer FontList {
+  Font f[];
+};
+
+layout(std430, buffer_reference) buffer UIContext {
+  mat4 screen;
+  FontList fonts;
+};
+
+layout(std430, push_constant) uniform PushConstant {
+  UIContext context;
+  UILayer   layer;
 } pc;
 
 layout(location = 0) out vec4 fragColor;
@@ -32,8 +110,8 @@ const vec2 square[6] = {
 };
 
 void main() {
-  Rect rect = pc.rects.r[gl_InstanceIndex];
+  Rect rect = pc.layer.rects.r[gl_InstanceIndex];
-  gl_Position = pc.screen.bounds * vec4(vec3(square[gl_VertexIndex] * rect.size, 0.0) + rect.pos.xyz, 1.0);
+  gl_Position = pc.context.screen * vec4(square[gl_VertexIndex] * rect.size + rect.pos, 0.0, 1.0);
   fragColor = rect.color;
 }
 

client/shader_src/ui_text.frag

@@ -1,8 +1,8 @@
 #version 450
 #extension GL_EXT_nonuniform_qualifier : enable
 
-layout(set = 0, binding = 0) uniform sampler font_samplers[];
+//layout(set = 0, binding = 0) uniform sampler font_samplers[];
-layout(set = 1, binding = 0) uniform texture2DArray font_textures[];
+//layout(set = 1, binding = 0) uniform texture2DArray font_textures[];
 
 layout(location = 0) in vec4 fragColor;
 layout(location = 1) in vec2 fragUV;
@@ -11,6 +11,7 @@ layout(location = 2) flat in uint code;
 layout(location = 0) out vec4 outColor;
 
 void main() {
-    outColor = fragColor * texture(sampler2DArray(font_textures[0], font_samplers[0]), vec3(fragUV, code));
+    //outColor = fragColor * texture(sampler2DArray(font_textures[0], font_samplers[0]), vec3(fragUV, code));
+    outColor = vec4(1.0, 1.0, 1.0, 1.0);
 }
 

client/src/command.c

@@ -52,6 +52,15 @@ VkResult command_end_single(VkDevice device, VkCommandBuffer command_buffer, VkC
   return result;
 }
 
+void command_copy_buffer(VkCommandBuffer command_buffer, VkBuffer src, VkBuffer dst, VkDeviceSize src_offset, VkDeviceSize dst_offset, VkDeviceSize size) {
+  VkBufferCopy copy = {
+    .srcOffset = src_offset,
+    .dstOffset = dst_offset,
+    .size = size,
+  };
+  vkCmdCopyBuffer(command_buffer, src, dst, 1, &copy);
+}
+
 VkResult command_transition_image_layout(VkDevice device, VkCommandPool transfer_pool, Queue transfer_queue, VkImageLayout old_layout, VkImageLayout new_layout, VkImage image, VkAccessFlags src_mask, VkAccessFlags dst_mask, VkPipelineStageFlags source, VkPipelineStageFlags dest, uint32_t source_family, uint32_t dest_family, VkImageAspectFlags aspect_flags) {
   VkCommandBuffer command_buffer = command_begin_single(device, transfer_pool);
 

client/src/main.c

@@ -1,3 +1,4 @@
+#include "command.h"
 #include "render.h"
 #include "arpa/inet.h"
 #include "ui.h"
@@ -9,38 +10,61 @@
 #include FT_FREETYPE_H
 
 VkResult render_thread(GLFWwindow* window, RenderContext* render_context) {
-  VkResult result;
-  UIContextStorage ui;
   FT_Library library;
+
+  UIContextStorage ui;
+  UILayerStorage layer;
+
   FontStorage font;
-  uint32_t* charmap;
+
-  VkBuffer temp_buffer;
+  VkBuffer transfer;
-  VmaAllocation temp_memory;
+  VmaAllocation transfer_memory;
   void* mapped;
-  UILayerStorage layer = {};
 
-  result = create_ui_context(render_context->device, render_context->allocator, render_context->render_pass, &ui);
+  VkResult result;
-  if(result != VK_SUCCESS) {
+
-    return result;
+  VK_RESULT(create_ui_context(
-  }
+        render_context->device,
+        render_context->allocator,
+        render_context->render_pass,
+        10,
+        render_context->swapchain_extent,
+        render_context->window_scale,
+        render_context->transfer_pool,
+        render_context->transfer_queue,
+        &ui));
 
   if(FT_Init_FreeType(&library) != FT_Err_Ok) {
     return VK_ERROR_UNKNOWN;
   }
 
-  result = load_font(render_context->device, render_context->allocator, ui.font_infos, ui.font_samplers, ui.font_textures, 0, render_context->transfer_pool, render_context->transfer_queue, library, "test.ttf", 16, VK_TRUE, &charmap, &font);
+  VK_RESULT(load_font(render_context->device, render_context->allocator, ui.font_infos, ui.font_samplers, ui.font_textures, 0, render_context->transfer_pool, render_context->transfer_queue, library, "test.ttf", 16, VK_TRUE, &font));
-  if(result != VK_SUCCESS) {
-    return result;
-  }
 
-  result = create_transfer_buffer(2*sizeof(String) + 100*sizeof(uint32_t), render_context->allocator, &temp_buffer, &temp_memory, (void**)&mapped);
+  VK_RESULT(create_layer(10, 100, 10, render_context->device, render_context->allocator, render_context->transfer_pool, render_context->transfer_queue, &layer));
-  if(result != VK_SUCCESS) {
+
-    return result;
+  VK_RESULT(create_transfer_buffer(render_context->allocator, sizeof(uint32_t) + sizeof(UIRect), &transfer, &transfer_memory, &mapped));
-  }
 
+  uint32_t* mapped_count = (uint32_t*)(mapped);
+  *mapped_count = 1;
+  UIRect* mapped_rect = (UIRect*)(mapped + sizeof(uint32_t));
+  mapped_rect->pos[0] = 0.0;
+  mapped_rect->pos[1] = 0.0;
+  mapped_rect->size[0] = 200.0;
+  mapped_rect->size[1] = 200.0;
+  mapped_rect->color[0] = 1.0;
+  mapped_rect->color[1] = 0.0;
+  mapped_rect->color[2] = 0.0;
+  mapped_rect->color[3] = 1.0;
+
+  VkCommandBuffer command_buffer = command_begin_single(render_context->device, render_context->transfer_pool);
+  command_copy_buffer(command_buffer, transfer, layer.layer, 0, offsetof(UILayer, draw_rects) + offsetof(DrawCommand, instance_count), sizeof(uint32_t));
+  command_copy_buffer(command_buffer, transfer, layer.rects, sizeof(uint32_t), 0, sizeof(UIRect));
+  VK_RESULT(command_end_single(render_context->device, command_buffer, render_context->transfer_pool, render_context->transfer_queue));
   vkQueueWaitIdle(render_context->transfer_queue.handle);
-  vmaUnmapMemory(render_context->allocator, temp_memory);
+  destroy_transfer_buffer(render_context->allocator, transfer, transfer_memory);
-  vmaDestroyBuffer(render_context->allocator, temp_buffer, temp_memory);
+
+  fprintf(stderr, "%ld\n", sizeof(UILayer));
+  fprintf(stderr, "%ld\n", sizeof(UIRect));
 
   while(glfwWindowShouldClose(window) == 0) {
     glfwPollEvents();

client/src/render.c

@@ -1051,15 +1051,15 @@ VkResult draw_frame(RenderContext* context, UIContextStorage* ui_context, UILaye
   // World subpass
   vkCmdNextSubpass(command_buffer, VK_SUBPASS_CONTENTS_INLINE);
   // UI subpass
-  vkCmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, ui_context->rect_pipeline.layout, 0, 1, &ui_context->font_samplers, 0, NULL);
+  vkCmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, ui_context->char_pipeline.layout, 0, 1, &ui_context->font_samplers, 0, NULL);
-  vkCmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, ui_context->rect_pipeline.layout, 1, 1, &ui_context->font_textures, 0, NULL);
+  vkCmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, ui_context->char_pipeline.layout, 1, 1, &ui_context->font_textures, 0, NULL);
   for(uint32_t i = 0; i < ui_layer_count; i++) {
     push[1] = ui_layers[i].address;
-    vkCmdPushConstants(command_buffer, ui_context->rect_pipeline.layout, VK_SHADER_STAGE_VERTEX_BIT, 0, 16, push);
+    vkCmdPushConstants(command_buffer, ui_context->rect_pipeline.layout, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0, 16, push);
     vkCmdBindPipeline(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, ui_context->rect_pipeline.pipeline);
     vkCmdDrawIndirect(command_buffer, ui_layers[i].layer, offsetof(UILayer, draw_rects), 1, 0);
     vkCmdBindPipeline(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, ui_context->char_pipeline.pipeline);
-    vkCmdDrawIndirect(command_buffer, ui_layers[i].layer, offsetof(UILayer, draw_chars), 1, 0);
+    vkCmdDrawIndirect(command_buffer, ui_layers[i].layer, offsetof(UILayer, draw_glyphs), 1, 0);
   }
 
   vkCmdEndRenderPass(command_buffer);
@@ -1106,7 +1106,12 @@ VkResult draw_frame(RenderContext* context, UIContextStorage* ui_context, UILaye
   return VK_SUCCESS;
 }
 
-VkResult create_transfer_buffer(VkDeviceSize size, VmaAllocator allocator, VkBuffer* buffer, VmaAllocation* memory, void** mapped) {
+VkResult create_transfer_buffer(
+    VmaAllocator allocator,
+    VkDeviceSize size,
+    VkBuffer* buffer,
+    VmaAllocation* memory,
+    void** mapped) {
   VkBufferCreateInfo buffer_info = {
     .sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
     .usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
@@ -1130,3 +1135,39 @@ VkResult create_transfer_buffer(VkDeviceSize size, VmaAllocator allocator, VkBuf
 
   return VK_SUCCESS;
 }
+
+
+VkResult create_storage_buffer(
+    VmaAllocator allocator,
+    VkBufferUsageFlags usage,
+    VkDeviceSize size,
+    VkBuffer* buffer,
+    VmaAllocation* memory) {
+  VkBufferCreateInfo buffer_info = {
+    .sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
+    .size = size,
+    .usage = usage | VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT | VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT,
+  };
+
+  VmaAllocationCreateInfo memory_info = {
+    .usage = VMA_MEMORY_USAGE_GPU_ONLY,
+  };
+
+  return vmaCreateBuffer(allocator, &buffer_info, &memory_info, buffer, memory, NULL);
+};
+
+void destroy_transfer_buffer(
+    VmaAllocator allocator,
+    VkBuffer buffer,
+    VmaAllocation memory) {
+  vmaUnmapMemory(allocator, memory);
+  vmaDestroyBuffer(allocator, buffer, memory);
+}
+
+VkDeviceAddress buffer_address(VkDevice device, VkBuffer buffer) {
+  VkBufferDeviceAddressInfo info = {
+    .sType = VK_STRUCTURE_TYPE_BUFFER_DEVICE_ADDRESS_INFO,
+    .buffer = buffer,
+  };
+  return vkGetBufferDeviceAddress(device, &info);
+}

client/src/ui.c

@@ -2,6 +2,7 @@
 #include "cglm/affine.h"
 #include "cglm/mat4.h"
 #include "command.h"
+#include "render.h"
 #include "stdio.h"
 #include "stdlib.h"
 #include "string.h"
@@ -338,16 +339,58 @@ VkResult create_ui_text_pipeline(VkDevice device, VkRenderPass render_pass, VkDe
 
 VkResult create_layer(
     uint32_t max_strings,
-    uint32_t max_characters,
+    uint32_t max_glyphs,
     uint32_t max_rects,
     VkDevice device,
     VmaAllocator allocator,
     VkCommandPool transfer_pool,
     Queue transfer_queue,
-    UILayerStorage* memory,
+    UILayerStorage* memory) {
-    VkDeviceAddress* address) {
   VkResult result;
 
+  VK_RESULT(create_storage_buffer(allocator, VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT, sizeof(UILayer), &memory->layer, &memory->layer_memory));
+  VK_RESULT(create_storage_buffer(allocator, 0, sizeof(UIRect)*max_rects, &memory->rects, &memory->rects_memory));
+  VK_RESULT(create_storage_buffer(allocator, 0, sizeof(UIString)*max_strings, &memory->strings, &memory->strings_memory))
+  VK_RESULT(create_storage_buffer(allocator, 0, sizeof(UIGlyph)*max_glyphs, &memory->glyphs, &memory->glyphs_memory));
+  VK_RESULT(create_storage_buffer(allocator, 0, sizeof(uint32_t)*max_glyphs, &memory->codes, &memory->codes_memory));
+
+  VkBuffer transfer;
+  VmaAllocation transfer_memory;
+  UILayer* mapped;
+  VK_RESULT(create_transfer_buffer(allocator, sizeof(UILayer), &transfer, &transfer_memory, (void**)&mapped));
+
+  mapped->strings = buffer_address(device, memory->strings);
+  mapped->codes = buffer_address(device, memory->codes);
+
+  mapped->glyphs = buffer_address(device, memory->glyphs);
+  mapped->rects = buffer_address(device, memory->rects);
+
+  mapped->draw_glyphs.first_vertex = 0;
+  mapped->draw_glyphs.vertex_count = 6;
+  mapped->draw_glyphs.first_instance = 0;
+  mapped->draw_glyphs.instance_count = 0;
+
+  mapped->draw_rects.first_vertex = 0;
+  mapped->draw_rects.vertex_count = 6;
+  mapped->draw_rects.first_instance = 0;
+  mapped->draw_rects.instance_count = 0;
+
+  mapped->dispatch_strings.x = 0;
+  mapped->dispatch_strings.y = 0;
+  mapped->dispatch_strings.z = 0;
+
+  VkCommandBuffer command_buffer = command_begin_single(device, transfer_pool);
+  command_copy_buffer(command_buffer, transfer, memory->layer, 0, 0, sizeof(UILayer));
+  vkCmdFillBuffer(command_buffer, memory->rects, 0, sizeof(UIRect)*max_rects, 0x00000000);
+  vkCmdFillBuffer(command_buffer, memory->strings, 0, sizeof(UIString)*max_strings, 0x00000000);
+  vkCmdFillBuffer(command_buffer, memory->glyphs, 0, sizeof(UIGlyph)*max_glyphs, 0x00000000);
+  vkCmdFillBuffer(command_buffer, memory->codes, 0, sizeof(uint32_t)*max_glyphs, 0x00000000);
+  VK_RESULT(command_end_single(device, command_buffer, transfer_pool, transfer_queue));
+  vkQueueWaitIdle(transfer_queue.handle);
+  destroy_transfer_buffer(allocator, transfer, transfer_memory);
+
+  memory->address = buffer_address(device, memory->layer);
+
   return VK_SUCCESS;
 }
 
@@ -364,7 +407,6 @@ VkResult load_font(
     const char* ttf_file,
     uint32_t size,
     VkBool32 antialias,
-    uint32_t** charmap,
     FontStorage* memory) {  
   FT_Face face;
 
@@ -419,15 +461,16 @@ VkResult load_font(
   info.width = max_width;
   info.height = max_height;
   info.num_symbols = symbol_count;
+  memory->num_symbols = symbol_count;
   uint32_t image_size = max_width*max_height*sizeof(uint32_t);
   uint32_t* images = malloc(image_size*symbol_count);
   memset(images, 0x00, image_size*symbol_count);
-  *charmap = malloc(sizeof(uint32_t)*symbol_count);
+  memory->charmap = malloc(sizeof(uint32_t)*symbol_count);
-  memcpy(*charmap, tmp_charmap, sizeof(uint32_t)*symbol_count);
+  memcpy(memory->charmap, tmp_charmap, sizeof(uint32_t)*symbol_count);
   free(tmp_charmap);
 
   for(uint32_t i = 0; i < symbol_count; i++) {
-    glyph_index = FT_Get_Char_Index(face, (*charmap)[i]);
+    glyph_index = FT_Get_Char_Index(face, memory->charmap[i]);
     FT_Load_Glyph(face, glyph_index, load_flags);
     for(uint32_t y = 0; y < face->glyph->bitmap.rows; y++) {
       for(uint32_t x = 0; x < face->glyph->bitmap.width; x++) {
@@ -780,23 +823,49 @@ VkResult create_ui_descriptor(VkDevice device, VmaAllocator allocator, uint32_t
   return VK_SUCCESS;
 }
 
-VkResult create_ui_context(VkDevice device, VmaAllocator allocator, VkRenderPass render_pass, UIContextStorage* memory) {
+VkResult create_ui_context(
+    VkDevice device,
+    VmaAllocator allocator,
+    VkRenderPass render_pass,
+    uint32_t max_fonts,
+    VkExtent2D swapchain_extent,
+    vec2 window_scale,
+    VkCommandPool transfer_pool,
+    Queue transfer_queue,
+    UIContextStorage* memory) {
 
   VkResult result;
-  result = create_ui_descriptor(device, allocator, 10, &memory->font_infos, &memory->font_infos_memory, &memory->font_samplers, &memory->font_textures, &memory->font_samplers_layout, &memory->font_textures_layout, &memory->fonts_pool);
-  if(result != VK_SUCCESS) {
-    return result;
-  }
 
-  result = create_ui_rect_pipeline(device, render_pass, memory->font_samplers_layout, memory->font_textures_layout, &memory->rect_pipeline);
+  VK_RESULT(create_storage_buffer(allocator, 0, sizeof(UIContext), &memory->context, &memory->context_memory)); 
-  if(result != VK_SUCCESS) {
+  VK_RESULT(create_storage_buffer(allocator, 0, sizeof(Font)*max_fonts, &memory->font_infos, &memory->font_infos_memory)); 
-    return result;
-  }
 
-  result = create_ui_text_pipeline(device, render_pass, memory->font_samplers_layout, memory->font_textures_layout, &memory->char_pipeline, &memory->string_pipeline);
+
-  if(result != VK_SUCCESS) {
+  VkBuffer transfer;
-    return result;
+  VmaAllocation transfer_memory;
-  }
+  UIContext* mapped;
+
+  VK_RESULT(create_transfer_buffer(allocator, sizeof(UIContext), &transfer, &transfer_memory, (void**)&mapped));
+
+  mapped->font_infos = buffer_address(device, memory->font_infos);
+  vec3 screen_offset = {-1.0, -1.0, 0.0};
+  vec3 screen_scale = {
+    1.0/(float)swapchain_extent.width*window_scale[0],
+    1.0/(float)swapchain_extent.height*window_scale[1], 1.0};
+  glm_mat4_identity(mapped->screen);
+  glm_translate(mapped->screen, screen_offset);
+  glm_scale(mapped->screen, screen_scale);
+
+  VkCommandBuffer command_buffer = command_begin_single(device, transfer_pool);
+  command_copy_buffer(command_buffer, transfer, memory->context, 0, 0, sizeof(UIContext));
+  VK_RESULT(command_end_single(device, command_buffer, transfer_pool, transfer_queue));
+  destroy_transfer_buffer(allocator, transfer, transfer_memory);
+  memory->address = buffer_address(device, memory->context);
+
+  VK_RESULT(create_ui_descriptor(device, allocator, max_fonts, &memory->font_infos, &memory->font_infos_memory, &memory->font_samplers, &memory->font_textures, &memory->font_samplers_layout, &memory->font_textures_layout, &memory->fonts_pool));
+
+  VK_RESULT(create_ui_rect_pipeline(device, render_pass, memory->font_samplers_layout, memory->font_textures_layout, &memory->rect_pipeline));
+
+  VK_RESULT(create_ui_text_pipeline(device, render_pass, memory->font_samplers_layout, memory->font_textures_layout, &memory->char_pipeline, &memory->string_pipeline));
 
   return VK_SUCCESS;
 }