Got text and rects rendering from same pipeline

client/include/ui.h

@@ -59,12 +59,6 @@ typedef struct FontStorageStruct {
   uint32_t      index;
 } FontStorage;
 
-typedef struct UIRectStruct {
-  vec2 pos;
-  vec2 size;
-  vec4 color;
-} UIRect;
-
 typedef struct UIStringStruct {
   vec2 pos;
   vec4 color;
@@ -73,44 +67,44 @@ typedef struct UIStringStruct {
   uint32_t length;
 } UIString;
 
-typedef struct UIGlyphStruct {
-  vec2     pos;
-  vec4     color;
-  float    size;
-  uint32_t code;
-} UIGlyph;
-
 typedef struct UIlayerStorageStruct {
   VkBuffer        strings;
-  VkBuffer        glyphs;
   VkBuffer        codes;
-  VkBuffer        rects; 
+  VkBuffer        drawables; 
   VkBuffer        layer;
 
   VmaAllocation strings_memory;
-  VmaAllocation rects_memory;
-  VmaAllocation glyphs_memory;
+  VmaAllocation drawables_memory;
   VmaAllocation codes_memory;
   VmaAllocation layer_memory;
 
   VkDeviceAddress address;
 
-  uint32_t max_glyphs;
-  uint32_t max_string;
-  uint32_t max_rects;
+  uint32_t max_strings;
+  uint32_t max_codes;
+  uint32_t max_drawables;
+  uint32_t drawable_count;
 } UILayerStorage;
 
+typedef struct UIDrawableStruct {
+  vec2     pos;
+  vec2     size;
+  vec4     color;
+  uint32_t type;
+  uint32_t code;
+} UIDrawable;
+
 typedef struct UILayerStruct {
   VkDeviceAddress strings;
   VkDeviceAddress codes;
 
-  VkDeviceAddress rects;
-  VkDeviceAddress glyphs;
+  VkDeviceAddress drawables;
 
-  DrawCommand     draw_glyphs;
-  DrawCommand     draw_rects;
+  DrawCommand     draw;
   DispatchCommand dispatch_strings;
+
   uint32_t font_index;
+  uint32_t drawable_count;
 } UILayer;
 
 typedef struct UIContextStruct {
@@ -133,8 +127,7 @@ typedef struct UIContextStorageStruct {
   VkDescriptorSetLayout font_textures_layout;
   VkDescriptorPool fonts_pool;
  
-  GraphicsPipeline rect_pipeline;
-  GraphicsPipeline char_pipeline;
+  GraphicsPipeline pipeline;
   ComputePipeline string_pipeline;
 } UIContextStorage;
 
@@ -164,8 +157,8 @@ VkResult load_font(
 
 VkResult create_layer(
     uint32_t max_strings,
-    uint32_t max_characters,
-    uint32_t max_rects,
+    uint32_t max_codes,
+    uint32_t max_drawables,
     uint32_t font_index,
     VkDevice device,
     VmaAllocator allocator,

client/shader_src/string.comp

@@ -13,25 +13,16 @@ 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 {
+struct Drawable {
   vec2 pos;
   vec2 size;
   vec4 color;
+  uint type;
+  uint code;
 };
 
-layout(std430, buffer_reference) readonly buffer RectList {
-  Rect r[];
+layout(std430, buffer_reference) writeonly buffer DrawableList {
+  Drawable d[];
 };
 
 layout(std430, buffer_reference) readonly buffer CodeList {
@@ -55,15 +46,13 @@ layout(std430, buffer_reference) buffer UILayer {
   StringList strings;
   CodeList codes;
 
-  RectList rects;
-  GlyphList glyphs;
-
-  DrawCommand draw_glyphs;
-  DrawCommand draw_rects;
+  DrawableList drawables;
 
-  DispatchCommand dispatch_strings;
+  DrawCommand draw;
+  DispatchCommand dispatch;
 
   uint font_index;
+  uint drawable_count;
 };
 
 struct Symbol {
@@ -108,14 +97,16 @@ void main() {
   String string = pc.layer.strings.s[gID];
   Font font = pc.context.fonts.f[pc.layer.font_index];
 
-  uint buffer_pos = atomicAdd(pc.layer.draw_glyphs.instance_count, string.len);
+  uint buffer_pos = atomicAdd(pc.layer.draw.instance_count, string.len);
   float x = 0;
   for(uint i = 0; i < string.len; i++) {
-    Symbol symbol = font.symbols.s[pc.layer.codes.c[string.offset + i]];
-    pc.layer.glyphs.g[buffer_pos + i].pos = string.pos + vec2(x, 0);
+    uint code = pc.layer.codes.c[string.offset + i];
+    Symbol symbol = font.symbols.s[code];
+    pc.layer.drawables.d[buffer_pos + i].pos = string.pos + vec2(x, 0);
     x += string.size*symbol.advance/font.width;
-    pc.layer.glyphs.g[buffer_pos + i].size = string.size;
-    pc.layer.glyphs.g[buffer_pos + i].color = string.color;
-    pc.layer.glyphs.g[buffer_pos + i].code = pc.layer.codes.c[string.offset + i];
+    pc.layer.drawables.d[buffer_pos + i].size = vec2(string.size, string.size);
+    pc.layer.drawables.d[buffer_pos + i].color = string.color;
+    pc.layer.drawables.d[buffer_pos + i].code = pc.layer.codes.c[string.offset + i];
+    pc.layer.drawables.d[buffer_pos + i].type = 1;
   }
 }

client/shader_src/ui.frag

@@ -7,11 +7,16 @@ layout(set = 1, binding = 0) uniform texture2DArray font_textures[];
 layout(location = 0) in vec4 fragColor;
 layout(location = 1) in vec2 fragUV;
 layout(location = 2) flat in uint code;
-layout(location = 3) flat in uint font;
+layout(location = 3) flat in uint index;
+layout(location = 4) flat in uint type;
 
 layout(location = 0) out vec4 outColor;
 
 void main() {
-    outColor = fragColor * texture(sampler2DArray(font_textures[font], font_samplers[0]), vec3(fragUV, code));
+    if(type == 0) {
+      outColor = fragColor;
+    } else if(type == 1) {
+      outColor = fragColor * texture(sampler2DArray(font_textures[index], font_samplers[index]), vec3(fragUV, code));
+    }
 }
 

client/shader_src/ui.vert

@@ -13,25 +13,16 @@ 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 {
+struct Drawable {
   vec2 pos;
   vec2 size;
   vec4 color;
+  uint type;
+  uint code;
 };
 
-layout(std430, buffer_reference) readonly buffer RectList {
-  Rect r[];
+layout(std430, buffer_reference) readonly buffer DrawableList {
+  Drawable d[];
 };
 
 layout(std430, buffer_reference) readonly buffer CodeList {
@@ -55,15 +46,13 @@ layout(std430, buffer_reference) buffer UILayer {
   StringList strings;
   CodeList codes;
 
-  RectList rects;
-  GlyphList glyphs;
+  DrawableList drawables;
 
-  DrawCommand draw_glyphs;
-  DrawCommand draw_rects;
-
-  DispatchCommand dispatch_strings;
+  DrawCommand draw;
+  DispatchCommand dispatch;
 
   uint font_index;
+  uint drawable_count;
 };
 
 struct Symbol {
@@ -78,7 +67,6 @@ layout(std430, buffer_reference) buffer SymbolList {
   Symbol s[];
 };
 
-
 struct Font {
   SymbolList symbols;
   uint num_symbols;
@@ -86,7 +74,6 @@ struct Font {
   uint height;
 };
 
-
 layout(std430, buffer_reference) buffer FontList {
   Font f[];
 };
@@ -104,7 +91,8 @@ layout(std430, push_constant) uniform PushConstant {
 layout(location = 0) out vec4 fragColor;
 layout(location = 1) out vec2 fragUV;
 layout(location = 2) out uint code;
-layout(location = 3) out uint font_index;
+layout(location = 3) out uint index;
+layout(location = 4) out uint type;
 
 const vec2 square[6] = {
   vec2(0.0, 0.0),
@@ -116,19 +104,27 @@ const vec2 square[6] = {
 };
 
 void main() {
-  Glyph glyph = pc.layer.glyphs.g[gl_InstanceIndex];
-  Font font = pc.context.fonts.f[pc.layer.font_index];
-  Symbol symbol = font.symbols.s[glyph.code];
-
-  float fragU = square[gl_VertexIndex].x * symbol.width/font.width;
-  float fragV = square[gl_VertexIndex].y * symbol.height/font.height;
-  float x = (square[gl_VertexIndex].x * symbol.width + symbol.left) * glyph.size / font.width;
-  float y = (square[gl_VertexIndex].y * symbol.height - symbol.top) * glyph.size / font.height;
-
-  fragUV = vec2(fragU, fragV);
-  fragColor = glyph.color;
-  gl_Position = pc.context.screen * vec4(vec2(x, y) + glyph.pos, 0.0, 1.0);
-  code = glyph.code;
-  font_index = pc.layer.font_index;
+  Drawable drawable = pc.layer.drawables.d[gl_InstanceIndex];
+  
+  if(drawable.type == 0) {
+    // Rect
+    gl_Position = pc.context.screen * vec4(square[gl_VertexIndex] * drawable.size + drawable.pos, 0.0, 1.0);
+  } else if(drawable.type == 1){
+    // Glyph
+    Font font = pc.context.fonts.f[pc.layer.font_index];
+    Symbol symbol = font.symbols.s[drawable.code];
+    float fragU = square[gl_VertexIndex].x * symbol.width/font.width;
+    float fragV = square[gl_VertexIndex].y * symbol.height/font.height;
+    float x = (square[gl_VertexIndex].x * symbol.width + symbol.left) * drawable.size.x / font.width;
+    float y = (square[gl_VertexIndex].y * symbol.height - symbol.top) * drawable.size.x / font.height;
+
+    fragUV = vec2(fragU, fragV);
+    gl_Position = pc.context.screen * vec4(vec2(x, y) + drawable.pos, 0.0, 1.0);
+  }
+
+  fragColor = drawable.color;
+  code = drawable.code;
+  type = drawable.type;
+  index = pc.layer.font_index;
 }
 

client/shader_src/ui_rect.frag

@@ -1,10 +0,0 @@
-#version 450
-
-layout(location = 0) in vec4 fragColor;
-
-layout(location = 0) out vec4 outColor;
-
-void main() {
-    outColor = fragColor;
-}
-

client/shader_src/ui_rect.vert

@@ -1,120 +0,0 @@
-#version 450
-#extension GL_EXT_buffer_reference : require
-
-struct String {
-  vec2 pos;
-  vec4 color;
-  float size;
-  uint offset;
-  uint length;
-};
-
-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 {
-  vec2 pos;
-  vec2 size;
-  vec4 color;
-};
-
-layout(std430, buffer_reference) readonly buffer RectList {
-  Rect r[];
-};
-
-layout(std430, buffer_reference) readonly buffer CodeList {
-  uint c[];
-};
-
-struct DrawCommand {
-  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;
-
-  uint font_index;
-};
-
-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 {
-  FontList fonts;
-  mat4 screen;
-};
-
-layout(std430, push_constant) uniform PushConstant {
-  UIContext context;
-  UILayer   layer;
-} pc;
-
-layout(location = 0) out vec4 fragColor;
-
-const vec2 square[6] = {
-  vec2(0.0, 0.0),
-  vec2(1.0, 0.0),
-  vec2(0.0, 1.0),
-  vec2(1.0, 0.0),
-  vec2(1.0, 1.0),
-  vec2(0.0, 1.0),
-};
-
-void main() {
-  Rect rect = pc.layer.rects.r[gl_InstanceIndex];
-  gl_Position = pc.context.screen * vec4(square[gl_VertexIndex] * rect.size + rect.pos, 0.0, 1.0);
-  fragColor = rect.color;
-}
-

client/src/main.c

@@ -40,33 +40,36 @@ VkResult render_thread(GLFWwindow* window, RenderContext* render) {
 
   VK_RESULT(load_font(render->device, render->allocator, &ui, 0, render->transfer_pool, render->transfer_queue, library, "test.ttf", 16, VK_TRUE, &font));
 
-  VK_RESULT(create_layer(10, 100, 10, 0, render->device, render->allocator, render->transfer_pool, render->transfer_queue, &layers[0]));
-  VK_RESULT(create_layer(10, 100, 10, 0, render->device, render->allocator, render->transfer_pool, render->transfer_queue, &layers[1]));
+  VK_RESULT(create_layer(10, 100, 200, 0, render->device, render->allocator, render->transfer_pool, render->transfer_queue, &layers[0]));
+  VK_RESULT(create_layer(10, 100, 200, 0, render->device, render->allocator, render->transfer_pool, render->transfer_queue, &layers[1]));
 
-  VK_RESULT(create_transfer_buffer(render->allocator, sizeof(uint32_t) + 2*sizeof(UIRect) + sizeof(UIString) + 100*sizeof(uint32_t), &transfer, &transfer_memory, &mapped));
+  VK_RESULT(create_transfer_buffer(render->allocator, 2*sizeof(uint32_t) + 2*sizeof(UIDrawable) + sizeof(UIString) + 100*sizeof(uint32_t), &transfer, &transfer_memory, &mapped));
 
   uint32_t* mapped_count = (uint32_t*)(mapped);
   mapped_count[0] = 1;
-  UIRect* mapped_rect = (UIRect*)(mapped + sizeof(uint32_t));
-  mapped_rect[0].pos[0] = 0.0;
-  mapped_rect[0].pos[1] = 0.0;
-  mapped_rect[0].size[0] = 200.0;
-  mapped_rect[0].size[1] = 200.0;
-  mapped_rect[0].color[0] = 1.0;
-  mapped_rect[0].color[1] = 0.0;
-  mapped_rect[0].color[2] = 0.0;
-  mapped_rect[0].color[3] = 1.0;
-
-  mapped_rect[1].pos[0] = 200.0;
-  mapped_rect[1].pos[1] = 0.0;
-  mapped_rect[1].size[0] = 200.0;
-  mapped_rect[1].size[1] = 200.0;
-  mapped_rect[1].color[0] = 0.0;
-  mapped_rect[1].color[1] = 1.0;
-  mapped_rect[1].color[2] = 0.0;
-  mapped_rect[1].color[3] = 1.0;
-
-  UIString* mapped_string = (UIString*)(mapped + sizeof(uint32_t) + 2*sizeof(UIRect));
+  mapped_count[1] = 1;
+  UIDrawable* mapped_drawable = (UIDrawable*)(mapped + 2*sizeof(uint32_t));
+  mapped_drawable[0].pos[0] = 0.0;
+  mapped_drawable[0].pos[1] = 0.0;
+  mapped_drawable[0].size[0] = 200.0;
+  mapped_drawable[0].size[1] = 200.0;
+  mapped_drawable[0].color[0] = 1.0;
+  mapped_drawable[0].color[1] = 0.0;
+  mapped_drawable[0].color[2] = 0.0;
+  mapped_drawable[0].color[3] = 1.0;
+  mapped_drawable[0].type = 0;
+
+  mapped_drawable[1].pos[0] = 200.0;
+  mapped_drawable[1].pos[1] = 0.0;
+  mapped_drawable[1].size[0] = 200.0;
+  mapped_drawable[1].size[1] = 200.0;
+  mapped_drawable[1].color[0] = 0.0;
+  mapped_drawable[1].color[1] = 1.0;
+  mapped_drawable[1].color[2] = 0.0;
+  mapped_drawable[1].color[3] = 1.0;
+  mapped_drawable[1].type = 0;
+
+  UIString* mapped_string = (UIString*)(mapped + 2*sizeof(uint32_t) + 2*sizeof(UIDrawable));
   mapped_string->pos[0] = 0.0;
   mapped_string->pos[1] = 200.0;
   mapped_string->size = 100.0;
@@ -76,21 +79,21 @@ VkResult render_thread(GLFWwindow* window, RenderContext* render) {
   mapped_string->color[3] = 1.0;
   mapped_string->length = 100;
   mapped_string->offset = 0;
-  uint32_t* mapped_codes = (uint32_t*)(mapped + sizeof(uint32_t) + 2*sizeof(UIRect) + sizeof(UIString));
+  uint32_t* mapped_codes = (uint32_t*)(mapped + 2*sizeof(uint32_t) + 2*sizeof(UIDrawable) + sizeof(UIString));
   for(uint32_t i = 0; i < 100; i++) {
     mapped_codes[i] = i;
   }
 
   VkCommandBuffer command_buffer = command_begin_single(render->device, render->transfer_pool);
-  command_copy_buffer(command_buffer, transfer, layers[0].layer, 0, offsetof(UILayer, draw_rects) + offsetof(DrawCommand, instance_count), sizeof(uint32_t));
-  command_copy_buffer(command_buffer, transfer, layers[1].layer, 0, offsetof(UILayer, draw_rects) + offsetof(DrawCommand, instance_count), sizeof(uint32_t));
-  command_copy_buffer(command_buffer, transfer, layers[1].layer, 0, offsetof(UILayer, dispatch_strings) + offsetof(DispatchCommand, x), sizeof(uint32_t));
+  command_copy_buffer(command_buffer, transfer, layers[0].layer, 0, offsetof(UILayer, drawable_count), sizeof(uint32_t));
+  command_copy_buffer(command_buffer, transfer, layers[1].layer, 0, offsetof(UILayer, drawable_count), sizeof(uint32_t));
+  command_copy_buffer(command_buffer, transfer, layers[1].layer, sizeof(uint32_t), offsetof(UILayer, dispatch_strings) + offsetof(DispatchCommand, x), sizeof(uint32_t));
 
-  command_copy_buffer(command_buffer, transfer, layers[0].rects, sizeof(uint32_t), 0, sizeof(UIRect));
-  command_copy_buffer(command_buffer, transfer, layers[1].rects, sizeof(uint32_t) + sizeof(UIRect), 0, sizeof(UIRect));
+  command_copy_buffer(command_buffer, transfer, layers[0].drawables, 2*sizeof(uint32_t), 0, sizeof(UIDrawable));
+  command_copy_buffer(command_buffer, transfer, layers[1].drawables, 2*sizeof(uint32_t) + sizeof(UIDrawable), 0, sizeof(UIDrawable));
 
-  command_copy_buffer(command_buffer, transfer, layers[1].strings, sizeof(uint32_t) + 2*sizeof(UIRect), 0, sizeof(UIString));
-  command_copy_buffer(command_buffer, transfer, layers[1].codes, sizeof(uint32_t) + 2*sizeof(UIRect) + sizeof(UIString), 0, 100*sizeof(uint32_t));
+  command_copy_buffer(command_buffer, transfer, layers[1].strings, 2*sizeof(uint32_t) + 2*sizeof(UIDrawable), 0, sizeof(UIString));
+  command_copy_buffer(command_buffer, transfer, layers[1].codes, 2*sizeof(uint32_t) + 2*sizeof(UIDrawable) + sizeof(UIString), 0, 100*sizeof(uint32_t));
   VK_RESULT(command_end_single(render->device, command_buffer, render->transfer_pool, render->transfer_queue));
   vkQueueWaitIdle(render->transfer_queue.handle);
   destroy_transfer_buffer(render->allocator, transfer, transfer_memory);

client/src/render.c

@@ -55,6 +55,7 @@ GLFWwindow* init_window() {
 
   glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
   glfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);
+
   GLFWwindow* window = glfwCreateWindow(800, 500, "roleplay", 0, 0);
 
   return window;
@@ -977,7 +978,7 @@ VkResult init_vulkan(GLFWwindow* window, RenderContext* context) {
   return VK_SUCCESS;
 }
 
-VkResult draw_frame(RenderContext* context, UIContextStorage* ui_context, UILayerStorage* ui_layers, uint32_t ui_layer_count) {
+VkResult draw_frame(RenderContext* context, UIContextStorage* ui_context, UILayerStorage* layers, uint32_t layer_count) {
   VkResult result;
 
   result = vkWaitForFences(context->device, 1, &context->in_flight_fences[context->current_frame], VK_TRUE, UINT64_MAX);
@@ -1023,7 +1024,7 @@ VkResult draw_frame(RenderContext* context, UIContextStorage* ui_context, UILaye
   };
   vkCmdSetScissor(command_buffer, 0, 1, &scissor);
 
-  VkClearValue clear_values[2] = {{.color={{0.0f, 0.0f, 0.0f, 1.0f}}}, {.depthStencil={1.0f, 0.0f}}};
+  VkClearValue clear_values[2] = {{.color={{0.0f, 0.0f, 0.0f, 0.0f}}}, {.depthStencil={1.0f, 0.0f}}};
 
   VkRenderPassBeginInfo render_pass_begin = {
     .sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO,
@@ -1039,48 +1040,48 @@ VkResult draw_frame(RenderContext* context, UIContextStorage* ui_context, UILaye
   
   // Compute Pass
   vkCmdBindPipeline(command_buffer, VK_PIPELINE_BIND_POINT_COMPUTE, ui_context->string_pipeline.pipeline);
-  for(uint32_t i = 0; i < ui_layer_count; i++) {
-    push[1] = ui_layers[i].address;
+  for(uint32_t i = 0; i < layer_count; i++) {
+    push[1] = layers[i].address;
     VkBufferMemoryBarrier draw_command_barrier_1 = {
       .sType = VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER,
-      .buffer = ui_layers[i].layer,
-      .offset = offsetof(UILayer, draw_glyphs),
+      .buffer = layers[i].layer,
+      .offset = offsetof(UILayer, draw),
       .size = sizeof(DrawCommand),
       .srcAccessMask = VK_ACCESS_INDIRECT_COMMAND_READ_BIT,
       .dstAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT,
     };
     vkCmdPipelineBarrier(command_buffer, VK_PIPELINE_STAGE_DRAW_INDIRECT_BIT, VK_PIPELINE_STAGE_TRANSFER_BIT, 0, 0, NULL, 1, &draw_command_barrier_1, 0, NULL);
-    vkCmdFillBuffer(command_buffer, ui_layers[i].layer, offsetof(UILayer, draw_glyphs) + offsetof(DrawCommand, instance_count), sizeof(uint32_t), 0x00000000);
+    command_copy_buffer(command_buffer, layers[i].layer, layers[i].layer, offsetof(UILayer, drawable_count), offsetof(UILayer, draw) + offsetof(DrawCommand, instance_count), sizeof(uint32_t));
     VkBufferMemoryBarrier draw_command_barrier_2 = {
       .sType = VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER,
-      .buffer = ui_layers[i].layer,
-      .offset = offsetof(UILayer, draw_glyphs),
+      .buffer = layers[i].layer,
+      .offset = offsetof(UILayer, draw),
       .size = sizeof(DrawCommand),
       .srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT,
       .dstAccessMask = VK_ACCESS_SHADER_WRITE_BIT,
     };
     vkCmdPipelineBarrier(command_buffer, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT, 0, 0, NULL, 1, &draw_command_barrier_2, 0, NULL);
     vkCmdPushConstants(command_buffer, ui_context->string_pipeline.layout, VK_SHADER_STAGE_COMPUTE_BIT, 0, 16, push);
-    vkCmdDispatchIndirect(command_buffer, ui_layers[i].layer, offsetof(UILayer, dispatch_strings));
+    vkCmdDispatchIndirect(command_buffer, layers[i].layer, offsetof(UILayer, dispatch_strings));
     VkBufferMemoryBarrier draw_command_barrier_3 = {
       .sType = VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER,
-      .buffer = ui_layers[i].layer,
-      .offset = offsetof(UILayer, draw_glyphs),
+      .buffer = layers[i].layer,
+      .offset = offsetof(UILayer, draw),
       .size = sizeof(DrawCommand),
       .srcAccessMask = VK_ACCESS_SHADER_WRITE_BIT,
       .dstAccessMask = VK_ACCESS_INDIRECT_COMMAND_READ_BIT,
     };
     vkCmdPipelineBarrier(command_buffer, VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT, VK_PIPELINE_STAGE_DRAW_INDIRECT_BIT, 0, 0, NULL, 1, &draw_command_barrier_3, 0, NULL);
 
-    VkBufferMemoryBarrier glyphs_barrier = {
+    VkBufferMemoryBarrier drawables_barrier = {
       .sType = VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER,
-      .buffer = ui_layers[i].glyphs,
+      .buffer = layers[i].drawables,
       .offset = 0,
-      .size = sizeof(UIGlyph)*ui_layers[i].max_glyphs,
+      .size = sizeof(UIDrawable)*layers[i].max_drawables,
       .srcAccessMask = VK_ACCESS_SHADER_WRITE_BIT,
       .dstAccessMask = VK_ACCESS_SHADER_READ_BIT,
     };
-    vkCmdPipelineBarrier(command_buffer, VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT, VK_PIPELINE_STAGE_VERTEX_SHADER_BIT, 0, 0, NULL, 1, &glyphs_barrier, 0, NULL);
+    vkCmdPipelineBarrier(command_buffer, VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT, VK_PIPELINE_STAGE_VERTEX_SHADER_BIT, 0, 0, NULL, 1, &drawables_barrier, 0, NULL);
   }
 
 
@@ -1089,17 +1090,15 @@ VkResult draw_frame(RenderContext* context, UIContextStorage* ui_context, UILaye
   // World subpass
   vkCmdNextSubpass(command_buffer, VK_SUBPASS_CONTENTS_INLINE);
   // UI subpass
-  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 | 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);
+  for(uint32_t i = 0; i < layer_count; i++) {
+    push[1] = layers[i].address;
+    vkCmdPushConstants(command_buffer, ui_context->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->pipeline.pipeline);
     if(i == 0) {
-      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->char_pipeline.layout, 1, 1, &ui_context->font_textures, 0, NULL);
+      vkCmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, ui_context->pipeline.layout, 0, 1, &ui_context->font_samplers, 0, NULL);
+      vkCmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, ui_context->pipeline.layout, 1, 1, &ui_context->font_textures, 0, NULL);
     }
-    vkCmdDrawIndirect(command_buffer, ui_layers[i].layer, offsetof(UILayer, draw_glyphs), 1, 0);
+    vkCmdDrawIndirect(command_buffer, layers[i].layer, offsetof(UILayer, draw), 1, 0);
   }
 
   vkCmdEndRenderPass(command_buffer);

client/src/ui.c

@@ -56,12 +56,88 @@ VkResult create_ui_pipeline(
     VkRenderPass render_pass,
     VkDescriptorSetLayout font_samplers_layout,
     VkDescriptorSetLayout font_textures_layout,
-    VkPipelineShaderStageCreateInfo* shader_stages,
-    uint32_t shader_stage_count,
-    VkPipelineVertexInputStateCreateInfo input_info,
-    VkPipelineInputAssemblyStateCreateInfo input_assembly_info,
-    GraphicsPipeline* pipeline) {
+    GraphicsPipeline* pipeline,
+    ComputePipeline* compute) {
   VkResult result;
+  VkShaderModule compute_shader = load_shader_file("shader_src/string.comp.spv", device);
+  if(compute_shader == VK_NULL_HANDLE) {
+    return VK_ERROR_UNKNOWN;
+  }
+
+  VkPipelineShaderStageCreateInfo compute_shader_stage = {
+    .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
+    .stage = VK_SHADER_STAGE_COMPUTE_BIT,
+    .pName = "main",
+    .module = compute_shader,
+  };
+
+  VkPushConstantRange push_constant = {
+    .stageFlags = VK_SHADER_STAGE_COMPUTE_BIT,
+    .size = 16,
+  };
+
+  VkPipelineLayoutCreateInfo compute_layout_info = {
+    .sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,
+    .pushConstantRangeCount = 1,
+    .pPushConstantRanges = &push_constant,
+  };
+
+  result = vkCreatePipelineLayout(device, &compute_layout_info, NULL, &compute->layout);
+  if(result != VK_SUCCESS) {
+    return result;
+  }
+
+  VkComputePipelineCreateInfo compute_pipeline_info = {
+    .sType = VK_STRUCTURE_TYPE_COMPUTE_PIPELINE_CREATE_INFO,
+    .layout = compute->layout,
+    .stage = compute_shader_stage,
+  };
+
+  result = vkCreateComputePipelines(device, VK_NULL_HANDLE, 1, &compute_pipeline_info, NULL, &compute->pipeline);
+  if(result != VK_SUCCESS) {
+    return result;
+  }
+
+  VkShaderModule vert_shader = load_shader_file("shader_src/ui.vert.spv", device);
+  if(vert_shader == VK_NULL_HANDLE) {
+    return VK_ERROR_UNKNOWN;
+  }
+  VkShaderModule frag_shader = load_shader_file("shader_src/ui.frag.spv", device);
+  if(frag_shader == VK_NULL_HANDLE) {
+    return VK_ERROR_UNKNOWN;
+  }
+  
+  VkPipelineShaderStageCreateInfo shader_stages[] = {
+    {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
+      .stage = VK_SHADER_STAGE_VERTEX_BIT,
+      .module = vert_shader,
+      .pName = "main",
+    },
+    {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
+      .stage = VK_SHADER_STAGE_FRAGMENT_BIT,
+      .module = frag_shader,
+      .pName = "main",
+    },
+  };
+
+  VkVertexInputBindingDescription bindings[] = {};
+  VkVertexInputAttributeDescription attributes[] = {};
+
+  VkPipelineVertexInputStateCreateInfo input_info = {
+    .sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
+    .pVertexBindingDescriptions = bindings,
+    .vertexBindingDescriptionCount = sizeof(bindings)/sizeof(VkVertexInputBindingDescription),
+    .pVertexAttributeDescriptions = attributes,
+    .vertexAttributeDescriptionCount = sizeof(attributes)/sizeof(VkVertexInputAttributeDescription),
+  };
+ 
+  VkPipelineInputAssemblyStateCreateInfo input_assembly_info = {
+    .sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO,
+    .topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,
+    .primitiveRestartEnable = VK_FALSE,
+  };
 
   VkPushConstantRange push_constants[] = {
     {
@@ -173,7 +249,7 @@ VkResult create_ui_pipeline(
 
   VkGraphicsPipelineCreateInfo draw_pipeline_info = {
     .sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO,
-    .stageCount = shader_stage_count,
+    .stageCount = sizeof(shader_stages)/sizeof(VkPipelineShaderStageCreateInfo),
     .pStages = shader_stages,
     .pVertexInputState = &input_info,
     .pInputAssemblyState = &input_assembly_info,
@@ -193,154 +269,14 @@ VkResult create_ui_pipeline(
   if(result != VK_SUCCESS) {
     return result;
   }
-  return VK_SUCCESS;
-}
-
-VkResult create_ui_rect_pipeline(VkDevice device, VkRenderPass render_pass, VkDescriptorSetLayout font_samplers_layout, VkDescriptorSetLayout font_textures_layout, GraphicsPipeline* pipeline) {
-  VkShaderModule vert_shader = load_shader_file("shader_src/ui_rect.vert.spv", device);
-  if(vert_shader == VK_NULL_HANDLE) {
-    return VK_ERROR_UNKNOWN;
-  }
-  VkShaderModule frag_shader = load_shader_file("shader_src/ui_rect.frag.spv", device);
-  if(frag_shader == VK_NULL_HANDLE) {
-    return VK_ERROR_UNKNOWN;
-  }
-  VkPipelineShaderStageCreateInfo shader_stages[] = {
-    {
-      .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
-      .stage = VK_SHADER_STAGE_VERTEX_BIT,
-      .module = vert_shader,
-      .pName = "main",
-    },
-    {
-      .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
-      .stage = VK_SHADER_STAGE_FRAGMENT_BIT,
-      .module = frag_shader,
-      .pName = "main",
-    },
-  };
-
-  VkVertexInputBindingDescription bindings[] = {};
-  VkVertexInputAttributeDescription attributes[] = {};
-  VkPipelineVertexInputStateCreateInfo input_info = {
-    .sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
-    .pVertexBindingDescriptions = bindings,
-    .vertexBindingDescriptionCount = sizeof(bindings)/sizeof(VkVertexInputBindingDescription),
-    .pVertexAttributeDescriptions = attributes,
-    .vertexAttributeDescriptionCount = sizeof(attributes)/sizeof(VkVertexInputAttributeDescription),
-  };
-
-  VkPipelineInputAssemblyStateCreateInfo input_assembly_info = {
-    .sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO,
-    .topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,
-    .primitiveRestartEnable = VK_FALSE,
-  };
-
-  VkResult result = create_ui_pipeline(device, render_pass, font_samplers_layout, font_textures_layout, shader_stages, sizeof(shader_stages)/sizeof(VkPipelineShaderStageCreateInfo), input_info, input_assembly_info, pipeline);
-  if(result != VK_SUCCESS) {
-    return result;
-  }
-
-  return VK_SUCCESS;
-}
-
-VkResult create_ui_text_pipeline(VkDevice device, VkRenderPass render_pass, VkDescriptorSetLayout font_samplers_layout, VkDescriptorSetLayout font_textures_layout, GraphicsPipeline* pipeline, ComputePipeline* compute) {
-  VkResult result;
-  VkShaderModule compute_shader = load_shader_file("shader_src/ui_text.comp.spv", device);
-  if(compute_shader == VK_NULL_HANDLE) {
-    return VK_ERROR_UNKNOWN;
-  }
-
-  VkPipelineShaderStageCreateInfo compute_shader_stage = {
-    .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
-    .stage = VK_SHADER_STAGE_COMPUTE_BIT,
-    .pName = "main",
-    .module = compute_shader,
-  };
-
-  VkPushConstantRange push_constant = {
-    .stageFlags = VK_SHADER_STAGE_COMPUTE_BIT,
-    .size = 16,
-  };
-
-  VkPipelineLayoutCreateInfo compute_layout_info = {
-    .sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,
-    .pushConstantRangeCount = 1,
-    .pPushConstantRanges = &push_constant,
-  };
-
-  result = vkCreatePipelineLayout(device, &compute_layout_info, NULL, &compute->layout);
-  if(result != VK_SUCCESS) {
-    return result;
-  }
-
-  VkComputePipelineCreateInfo compute_pipeline_info = {
-    .sType = VK_STRUCTURE_TYPE_COMPUTE_PIPELINE_CREATE_INFO,
-    .layout = compute->layout,
-    .stage = compute_shader_stage,
-  };
-
-  result = vkCreateComputePipelines(device, VK_NULL_HANDLE, 1, &compute_pipeline_info, NULL, &compute->pipeline);
-  if(result != VK_SUCCESS) {
-    return result;
-  }
-
-  VkShaderModule vert_shader = load_shader_file("shader_src/ui_text.vert.spv", device);
-  if(vert_shader == VK_NULL_HANDLE) {
-    return VK_ERROR_UNKNOWN;
-  }
-  VkShaderModule frag_shader = load_shader_file("shader_src/ui_text.frag.spv", device);
-  if(frag_shader == VK_NULL_HANDLE) {
-    return VK_ERROR_UNKNOWN;
-  }
-  
-  // TODO: add a compute stage before the shader stages that sets up the draw buffer and commands for the characters based off of strings + positions
-  // 1. Reserve a buffer for array of draw command params + Char on the GPU
-  // 2. Reserve a buffer for Text on the GPU
-  VkPipelineShaderStageCreateInfo shader_stages[] = {
-    {
-      .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
-      .stage = VK_SHADER_STAGE_VERTEX_BIT,
-      .module = vert_shader,
-      .pName = "main",
-    },
-    {
-      .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
-      .stage = VK_SHADER_STAGE_FRAGMENT_BIT,
-      .module = frag_shader,
-      .pName = "main",
-    },
-  };
-
-  VkVertexInputBindingDescription bindings[] = {};
-  VkVertexInputAttributeDescription attributes[] = {};
-
-  VkPipelineVertexInputStateCreateInfo input_info = {
-    .sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
-    .pVertexBindingDescriptions = bindings,
-    .vertexBindingDescriptionCount = sizeof(bindings)/sizeof(VkVertexInputBindingDescription),
-    .pVertexAttributeDescriptions = attributes,
-    .vertexAttributeDescriptionCount = sizeof(attributes)/sizeof(VkVertexInputAttributeDescription),
-  };
- 
-  VkPipelineInputAssemblyStateCreateInfo input_assembly_info = {
-    .sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO,
-    .topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,
-    .primitiveRestartEnable = VK_FALSE,
-  };
-
-  result = create_ui_pipeline(device, render_pass, font_samplers_layout, font_textures_layout, shader_stages, sizeof(shader_stages)/sizeof(VkPipelineShaderStageCreateInfo), input_info, input_assembly_info, pipeline);
-  if(result != VK_SUCCESS) {
-    return result;
-  }
 
   return VK_SUCCESS;
 }
 
 VkResult create_layer(
     uint32_t max_strings,
-    uint32_t max_glyphs,
-    uint32_t max_rects,
+    uint32_t max_codes,
+    uint32_t max_drawables,
     uint32_t font_index,
     VkDevice device,
     VmaAllocator allocator,
@@ -349,15 +285,14 @@ VkResult create_layer(
     UILayerStorage* memory) {
   VkResult result;
 
-  memory->max_string = max_strings;
-  memory->max_glyphs = max_glyphs;
-  memory->max_rects = max_rects;
+  memory->max_strings = max_strings;
+  memory->max_codes = max_codes;
+  memory->max_drawables = max_drawables;
 
-  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, VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_SRC_BIT, sizeof(UILayer), &memory->layer, &memory->layer_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));
+  VK_RESULT(create_storage_buffer(allocator, 0, sizeof(UIDrawable)*max_drawables, &memory->drawables, &memory->drawables_memory));
+  VK_RESULT(create_storage_buffer(allocator, 0, sizeof(uint32_t)*max_codes, &memory->codes, &memory->codes_memory));
 
   VkBuffer transfer;
   VmaAllocation transfer_memory;
@@ -367,31 +302,25 @@ VkResult create_layer(
   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->drawables = buffer_address(device, memory->drawables);
 
-  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->draw.first_vertex = 0;
+  mapped->draw.vertex_count = 6;
+  mapped->draw.first_instance = 0;
+  mapped->draw.instance_count = 0;
 
   mapped->dispatch_strings.x = 0;
   mapped->dispatch_strings.y = 1;
   mapped->dispatch_strings.z = 1;
 
   mapped->font_index = font_index;
+  mapped->drawable_count = 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);
+  vkCmdFillBuffer(command_buffer, memory->drawables, 0, sizeof(UIDrawable)*max_drawables, 0x00000000);
+  vkCmdFillBuffer(command_buffer, memory->codes, 0, sizeof(uint32_t)*max_codes, 0x00000000);
   VK_RESULT(command_end_single(device, command_buffer, transfer_pool, transfer_queue));
   vkQueueWaitIdle(transfer_queue.handle);
   destroy_transfer_buffer(allocator, transfer, transfer_memory);
@@ -805,9 +734,7 @@ VkResult create_ui_context(
 
   VK_RESULT(create_ui_descriptor(device, max_fonts, &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));
+  VK_RESULT(create_ui_pipeline(device, render_pass, memory->font_samplers_layout, memory->font_textures_layout, &memory->pipeline, &memory->string_pipeline));
 
   return VK_SUCCESS;
 }