Add Drawlist

- Add Pool iterator support
- Add Pool Expandability
- Add Pool::Push
- Add Lithium Maths API
- Remove InitPools
- update spirv-helper

CMakeLists.txt

@@ -43,6 +43,8 @@ set(PD_SOURCES
 
     # Lithium
     source/lithium/pools.cpp
+    source/lithium/math.cpp
+    source/lithium/drawlist.cpp
 )
 
 if(${PD_BUILD_SHARED})

include/pd/core/pool.hpp

@@ -8,7 +8,7 @@ class Pool {
  public:
   using value_type = T;
   using iterator = T*;
-  using const_iterator = const iterator*;
+  using const_iterator = const T*;
 
   Pool() = default;
   ~Pool() {
@@ -36,21 +36,34 @@ class Pool {
   Pool& operator=(Pool&&) = delete;
 
   T* Allocate(size_t num = 1) {
-    if (CheckLimits(num)) return nullptr;
+    ExpandIf(num);
     T* ret = &pData[pPos];
     pPos += num;
     return ret;
   }
 
-  bool CheckLimits(size_t num) {
-    if ((pPos + num) >= pCap) {
-      throw std::runtime_error(
-          std::format("[PD::Pool]: Trying to allocate {} elements but this is "
-                      "going out of range ({}/{})",
-                      num, pPos + num, pCap));
-      return true;
+  void Push(const T& elem) {
+    T* e = Allocate(1);
+    *e = elem;
   }
-    return false;
+
+  void ExpandIf(size_t req) {
+    if ((pPos + req) <= pCap) return;
+    size_t ncap = std::max(pCap * 2, pPos + req);
+    T* nu = pAlloc.allocate(ncap);
+    if (pData) {
+      for (size_t i = 0; i < pPos; i++) {
+        std::allocator_traits<Alloc>::construct(
+            pAlloc, &nu[i], std::move_if_noexcept(pData[i]));
+      }
+      pAlloc.deallocate(pData, pCap);
+    }
+    for (size_t i = pPos; i < ncap; i++) {
+        std::allocator_traits<Alloc>::construct(pAlloc, &nu[i]);
+      }
+    PDLOG("Pool::ExpandIf({}): {} -> {}", req, pCap, ncap);
+    pData = nu;
+    pCap = ncap;
   }
 
   void Reset() {
@@ -67,6 +80,10 @@ class Pool {
   size_t capacity() const { return pCap; }
   T& at(size_t idx) { return pData[idx]; }
   const T& at(size_t idx) const { return pData[idx]; }
+  iterator begin() { return pData; }
+  iterator end() { return pData + pPos; }
+  const_iterator begin() const { return pData; }
+  const_iterator end() const { return pData + pPos; }
 
   T& operator[](size_t idx) { return at(idx); }
   const T& operator[](size_t idx) const { return at(idx); }

include/pd/drivers/gfx.hpp

@@ -34,6 +34,7 @@ class PD_API GfxDriver : public DriverInterface {
   }
   virtual void DeleteTexture(const Li::Texture& tex) {}
   virtual void Draw(const Pool<Li::Command>& commands) {}
+  Li::Texture::Ptr GetWhiteTexture() { return &pWhite; }
 
  protected:
   virtual void SysDeinit() {}
@@ -55,6 +56,7 @@ class PD_API GfxDriver : public DriverInterface {
   Mat4 Projection;
   ivec2 ViewPort;
   std::unordered_map<TextureID, Li::Texture> pTextureRegestry;
+  Li::Texture pWhite;
 };
 
 struct DefaultGfxConfig {
@@ -79,9 +81,11 @@ class GfxDriverBase : public GfxDriver {
   virtual ~GfxDriverBase() {}
 
   void Init() override {
-    pVtxPool.Init(Config::NumVertices);
-    pIdxPool.Init(Config::NumIndices);
+    // pVtxPool.Init(Config::NumVertices);
+    // pIdxPool.Init(Config::NumIndices);
     SysInit();
+    std::vector<u8> img(16 * 16 * 4, 0xff);
+    pWhite = LoadTexture(img, 16, 16);
   }
 
   void Draw(const Pool<Li::Command>& commands) override {
@@ -90,11 +94,12 @@ class GfxDriverBase : public GfxDriver {
     while (index < commands.size()) {
       CurrentTex = commands[index].Tex;
       if (!CurrentTex) {
-        index++;
-        continue;
+        CurrentTex = pWhite.GetID();
       }
       size_t startidx = CurrentIndex;
-      while (index < commands.size() && CurrentTex == commands[index].Tex) {
+      while (index < commands.size() &&
+             (CurrentTex == commands[index].Tex ||
+              (CurrentTex == pWhite.GetID() && commands[index].Tex == 0))) {
         const auto& c = commands[index];
         CountVertices += c.VertexCount;
         CountIndices += c.IndexCount;
@@ -155,6 +160,9 @@ class PD_API Gfx {
   static void DeleteTexture(const Li::Texture& tex) {
     driver->DeleteTexture(tex);
   }
+  static Li::Texture::Ptr GetWhiteTexture() {
+    return driver->GetWhiteTexture();
+  }
 
   static const char* GetDriverName() { return driver->GetName(); }
 

include/pd/lithium/drawlist.hpp

@@ -0,0 +1,116 @@
+#pragma once
+
+#include <pd/lithium/command.hpp>
+#include <pd/lithium/texture.hpp>
+
+using LiPathRectFlags = PD::u32;
+
+enum LiPathRectFlags_ : PD::u32 {
+  LiPathRectFlags_None = 0,
+  LiPathRectFlags_KeepTopLeft = 1 << 0,
+  LiPathRectFlags_KeepTopRight = 1 << 1,
+  LiPathRectFlags_KeepBotRight = 1 << 2,
+  LiPathRectFlags_KeepBotLeft = 1 << 3,
+  LiPathRectFlags_KeepTop =
+      LiPathRectFlags_KeepTopLeft | LiPathRectFlags_KeepTopRight,
+  LiPathRectFlags_KeepBot =
+      LiPathRectFlags_KeepBotLeft | LiPathRectFlags_KeepBotRight,
+  LiPathRectFlags_KeepLeft =
+      LiPathRectFlags_KeepTopLeft | LiPathRectFlags_KeepBotLeft,
+  LiPathRectFlags_KeepRight =
+      LiPathRectFlags_KeepTopRight | LiPathRectFlags_KeepBotRight,
+};
+
+using LiDrawFlags = PD::u32;
+enum LiDrawFlags_ : PD::u32 {
+  LiDrawFlags_None = 0,
+  LiDrawFlags_Close = 1 << 0,
+};
+
+using LiTextFlags = PD::u32;
+enum LiTextFlags_ : PD::u32 {
+  LiTextFlags_None = 0,             ///< Do nothing
+  LiTextFlags_AlignRight = 1 << 0,  ///< Align Right of position
+  LiTextFlags_AlignMid = 1 << 1,    ///< Align in the middle of pos and box
+  LiTextFlags_Shaddow = 1 << 2,     ///< Draws the text twice to create shaddow
+  LiTextFlags_Wrap = 1 << 3,        ///< Wrap Text: May be runs better with TMS
+  LiTextFlags_Short = 1 << 4,       ///< Short Text: May be runs better with TMS
+  LiTextFlags_Scroll = 1 << 5,      ///< Not implemented [scoll text if to long]
+  LiTextFlags_NoOOS = 1 << 6,       ///< No Out of Screen Rendering
+};
+
+namespace PD {
+namespace Li {
+class PD_API Drawlist {
+ public:
+  Drawlist();
+  ~Drawlist();
+
+  /** Baisc */
+
+  void Merge(Drawlist& other);
+  void Copy(Drawlist& other);
+  void Optimize();
+  void Clear();
+
+  /** Command Allocation */
+  Command& NewCommand();
+
+  /** Path API */
+  void PathAdd(const fvec2& point) { pPath.Push(point); }
+  void PathAdd(float x, float y) { pPath.Push(fvec2(x, y)); }
+  void PathClear() { pPath.Reset(); }
+  /**
+   * @brief Reserve memory for the next PathAdd uses
+   * @note As path will autoexpant and keep the size this func is
+   *       only for special use cases
+   */
+  void PathReserve(size_t num) { pPath.ExpandIf(num); }
+  void PathStroke(u32 color, int t = 1, LiDrawFlags flags = LiDrawFlags_None);
+  void PathFill(u32 color);
+  void PathArcToN(const fvec2& c, float r, float amin, float amax, int s);
+  void PathFastArcToN(const fvec2& c, float r, float amin, float amax, int s);
+  void PathRect(const fvec2& tl, const fvec2& br, float r = 0.f);
+  void PathRectEx(const fvec2& tl, const fvec2& br, float r = 0.f,
+                  LiPathRectFlags flags = LiPathRectFlags_None);
+
+  /** Texture Handling */
+  void BindTexture(const Texture& tex);
+  void UnbindTexture() { pCurrentTexture = Texture(); }
+
+  /** Data geters */
+  const Pool<Command>& Data() const { return pCommands; }
+  operator const Pool<Command>&() const { return pCommands; }
+
+  /** Drawing functions */
+  void DrawRect(const fvec2& pos, const fvec2& size, u32 color, int t = 1);
+  void DrawRectFilled(const fvec2& pos, const fvec2& size, u32 color);
+  void DrawTriangle(const fvec2& a, const fvec2& b, const fvec2& c, u32 color,
+                    int t = 1);
+  void DrawTriangleFilled(const fvec2& a, const fvec2& b, const fvec2& c,
+                          u32 color);
+  void DrawCircle(const fvec2& center, float rad, u32 color, int num_segments,
+                  int t = 1);
+  void DrawCircleFilled(const fvec2& center, float rad, u32 color,
+                        int num_segments);
+  void DrawText(const fvec2& p, const char* text, u32 color);
+  void DrawTextEx(const fvec2& p, const char* text, u32 color,
+                  LiTextFlags flags, const fvec2& box = fvec2(0.f));
+
+  void DrawPolyLine(const Pool<fvec2>& points, u32 color,
+                    LiDrawFlags flags = LiDrawFlags_None, int t = 1);
+  void DrawConvexPolyFilled(const Pool<fvec2>& points, u32 color);
+
+  void PrimQuad(Command& cmd, const Rect& quad, const Rect& uv, u32 color);
+  void PrimTriangle(Command& cmd, const fvec2& a, const fvec2& b,
+                    const fvec2& c, u32 color);
+
+ private:
+  Texture pCurrentTexture;
+  Pool<Command> pCommands;
+  Pool<fvec2> pPath;
+  Pool<Vertex> pVertices;
+  Pool<u16> pIndices;
+};
+}  // namespace Li
+}  // namespace PD

include/pd/lithium/lithium.hpp

@@ -1,5 +1,7 @@
 #pragma once
 
 #include <pd/lithium/command.hpp>
+#include <pd/lithium/drawlist.hpp>
+#include <pd/lithium/math.hpp>
 #include <pd/lithium/pools.hpp>
 #include <pd/lithium/vertex.hpp>

include/pd/lithium/math.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <pd/core/core.hpp>
+#include <pd/lithium/rect.hpp>
+
+namespace PD {
+namespace Li {
+namespace Math {
+PD_API bool InBounds(const fvec2& pos, const fvec2& size, const fvec4& rect);
+PD_API bool InBounds(const fvec2& pos, const fvec4& rect);
+PD_API bool InBounds(const fvec2& a, const fvec2& b, const fvec2& c,
+                     const fvec4& rect);
+PD_API void RotateCorner(fvec2& pos, float sinus, float cosinus);
+PD_API Rect PrimRect(const fvec2& pos, const fvec2& size, float angle = 0.f);
+PD_API Rect PrimLine(const fvec2& a, const fvec2& b, int t = 1);
+}  // namespace Math
+}  // namespace Li
+}  // namespace PD

include/pd/lithium/pools.hpp

@@ -5,8 +5,8 @@
 
 namespace PD {
 namespace Li {
-PD_API void InitPools(size_t max_vertices = 32768);
 PD_API Vertex* AllocateVertices(size_t count);
 PD_API u16* AllocateIndices(size_t count);
+PD_API void ResetPools();
 }  // namespace Li
 }  // namespace PD

include/pd/lithium/texture.hpp

@@ -18,6 +18,7 @@ enum class TextureFormat {
 namespace Li {
 class Texture {
  public:
+  using Ptr = Texture*;
   Texture() : pID(0), pSize(0, 0), pUV(fvec4(0, 0, 1, 1)) {}
   Texture(TextureID id, ivec2 size)
       : pID(id), pSize(size), pUV(fvec4(0, 0, 1, 1)) {}

source/lithium/drawlist.cpp

@@ -0,0 +1,285 @@
+#include <pd/drivers/gfx.hpp>
+#include <pd/lithium/drawlist.hpp>
+#include <pd/lithium/math.hpp>
+
+namespace PD {
+namespace Li {
+PD_API Drawlist::Drawlist() { Clear(); }
+
+PD_API Drawlist::~Drawlist() { Clear(); }
+
+PD_API void Drawlist::Merge(Drawlist& other) {}
+
+PD_API void Drawlist::Copy(Drawlist& other) {}
+
+PD_API void Drawlist::Optimize() {}
+
+PD_API void Drawlist::Clear() {
+  UnbindTexture();
+  pPath.Reset();
+  pVertices.Reset();
+  pIndices.Reset();
+}
+
+/** Command Allocation */
+PD_API Command& Drawlist::NewCommand() {
+  auto cmd = pCommands.Allocate(1);
+  cmd->Tex = pCurrentTexture.GetID();
+  return *cmd;
+}
+
+PD_API void Drawlist::BindTexture(const Texture& tex) { pCurrentTexture = tex; }
+
+/** Path API */
+PD_API void Drawlist::PathStroke(u32 color, int t, LiDrawFlags flags) {
+  DrawPolyLine(pPath, color, flags, t);
+  PathClear();
+}
+
+PD_API void Drawlist::PathFill(u32 color) {
+  DrawConvexPolyFilled(pPath, color);
+  PathClear();
+}
+
+PD_API void Drawlist::PathArcToN(const fvec2& c, float r, float amin,
+                                 float amax, int s) {
+  // Path.push_back(c);
+  PathReserve(s + 1);
+  for (int i = 0; i < s; i++) {
+    float a = amin + ((float)i / (float)s) * (amax - amin);
+    PathAdd(vec2(c.x + std::cos(a) * r, c.y + std::sin(a) * r));
+  }
+}
+
+PD_API void Drawlist::PathFastArcToN(const fvec2& c, float r, float amin,
+                                     float amax, int s) {
+  /**
+   * Funcion with less division overhead
+   * Usefull for stuff where a lot of calculations are required
+   */
+  float d = (amax - amin) / s;
+  PathReserve(s + 1);
+  for (int i = 0; i <= s; i++) {
+    float a = amin + i * d;
+    PathAdd(fvec2(c.x + std::cos(a) * r, c.y + std::sin(a) * r));
+  }
+}
+
+PD_API void Drawlist::PathRect(const fvec2& tl, const fvec2& br, float r) {
+  if (r == 0.f) {
+    PathAdd(tl);
+    PathAdd(vec2(br.x, tl.y));
+    PathAdd(br);
+    PathAdd(vec2(tl.x, br.y));
+  } else {
+    float r = std::min({r, (br.x - tl.x) * 0.5f, (br.y - tl.y) * 0.5f});
+    /** Calculate Optimal segment count automatically */
+    float corner = M_PI * 0.5f;
+    int segments = std::max(3, int(std::ceil(corner / (6.0f * M_PI / 180.0f))));
+
+    /**
+     * To Correctly render filled shapes with Paths API
+     * The Commands need to be setup clockwise
+     */
+    /** Top Left */
+    PathAdd(vec2(tl.x + r, tl.y));
+    PathFastArcToN(vec2(br.x - r, tl.y + r), r, -M_PI / 2.0f, 0.0f, segments);
+    /** Top Right */
+    PathAdd(vec2(br.x, br.y - r));
+    PathFastArcToN(vec2(br.x - r, br.y - r), r, 0.0f, M_PI / 2.0f, segments);
+    /** Bottom Right */
+    PathAdd(vec2(tl.x + r, br.y));
+    PathFastArcToN(vec2(tl.x + r, br.y - r), r, M_PI / 2.0f, M_PI, segments);
+    /** Bottom Left */
+    PathAdd(vec2(tl.x, tl.y + r));
+    PathFastArcToN(vec2(tl.x + r, tl.y + r), r, M_PI, 3.0f * M_PI / 2.0f,
+                   segments);
+  }
+}
+
+PD_API void Drawlist::PathRectEx(const fvec2& tl, const fvec2& br, float r,
+                                 LiPathRectFlags flags) {
+  if (r == 0.f) {
+    PathAdd(tl);
+    PathAdd(vec2(br.x, tl.y));
+    PathAdd(br);
+    PathAdd(vec2(tl.x, br.y));
+  } else {
+    float r = std::min({r, (br.x - tl.x) * 0.5f, (br.y - tl.y) * 0.5f});
+    /** Calculate Optimal segment count automatically */
+    float corner = M_PI * 0.5f;
+    int segments = std::max(3, int(std::ceil(corner / (6.0f * M_PI / 180.0f))));
+
+    /**
+     * To Correctly render filled shapes with Paths API
+     * The Commands need to be setup clockwise
+     */
+    /** Top Left */
+    if (flags & LiPathRectFlags_KeepTopLeft) {
+      PathAdd(tl);
+    } else {
+      PathAdd(vec2(tl.x + r, tl.y));
+      PathFastArcToN(vec2(br.x - r, tl.y + r), r, -M_PI / 2.0f, 0.0f, segments);
+    }
+
+    /** Top Right */
+    if (flags & LiPathRectFlags_KeepTopRight) {
+      PathAdd(vec2(br.x, tl.y));
+    } else {
+      PathAdd(vec2(br.x, br.y - r));
+      PathFastArcToN(vec2(br.x - r, br.y - r), r, 0.0f, M_PI / 2.0f, segments);
+    }
+    /** Bottom Right */
+    if (flags & LiPathRectFlags_KeepBotRight) {
+      PathAdd(br);
+    } else {
+      PathAdd(vec2(tl.x + r, br.y));
+      PathFastArcToN(vec2(tl.x + r, br.y - r), r, M_PI / 2.0f, M_PI, segments);
+    }
+    /** Bottom Left */
+    if (flags & LiPathRectFlags_KeepBotLeft) {
+      PathAdd(vec2(tl.x, br.y));
+    } else {
+      PathAdd(vec2(tl.x, tl.y + r));
+      PathFastArcToN(vec2(tl.x + r, tl.y + r), r, M_PI, 3.0f * M_PI / 2.0f,
+                     segments);
+    }
+  }
+}
+
+/** Drawing functions */
+PD_API void Drawlist::DrawRect(const fvec2& pos, const fvec2& size, u32 color,
+                               int t) {
+  PathRect(pos, pos + size);
+  PathStroke(color, t, LiDrawFlags_Close);
+}
+
+PD_API void Drawlist::DrawRectFilled(const fvec2& pos, const fvec2& size,
+                                     u32 color) {
+  PathRect(pos, pos + size);
+  PathFill(color);
+}
+
+PD_API void Drawlist::DrawTriangle(const fvec2& a, const fvec2& b,
+                                   const fvec2& c, u32 color, int t) {
+  PathAdd(a);
+  PathAdd(b);
+  PathAdd(c);
+  PathStroke(color, t, LiDrawFlags_Close);
+}
+
+PD_API void Drawlist::DrawTriangleFilled(const fvec2& a, const fvec2& b,
+                                         const fvec2& c, u32 color) {
+  PathAdd(a);
+  PathAdd(b);
+  PathAdd(c);
+  PathFill(color);
+}
+
+PD_API void Drawlist::DrawCircle(const fvec2& center, float rad, u32 color,
+                                 int num_segments, int t) {
+  if (num_segments <= 0) {
+    // Auto Segment
+  } else {
+    float am = (M_PI * 2.0f) * ((float)num_segments) / (float)num_segments;
+    PathArcToN(center, rad, 0.f, am, num_segments);
+  }
+  UnbindTexture();  // Only Solid Color Supported
+  PathStroke(color, t, LiDrawFlags_Close);
+}
+
+PD_API void Drawlist::DrawCircleFilled(const fvec2& center, float rad,
+                                       u32 color, int num_segments) {
+  if (num_segments <= 0) {
+    // Auto Segment
+  } else {
+    float am = (M_PI * 2.0f) * ((float)num_segments) / (float)num_segments;
+    PathArcToN(center, rad, 0.f, am, num_segments);
+  }
+  PathFill(color);
+}
+
+PD_API void Drawlist::DrawText(const fvec2& p, const char* text, u32 color) {}
+
+PD_API void Drawlist::DrawTextEx(const fvec2& p, const char* text, u32 color,
+                                 LiTextFlags flags, const fvec2& box) {}
+
+PD_API void Drawlist::DrawPolyLine(const Pool<fvec2>& points, u32 color,
+                                   LiDrawFlags flags, int t) {
+  if (points.size() < 2) {
+    return;
+  }
+  UnbindTexture();
+  auto& cmd = NewCommand();
+  bool close = (flags & (1 << 0));
+  int num_points = close ? (int)points.size() : (int)points.size() - 1;
+  if (flags & (1 << 1)) {
+    // TODO: Find a way to draw less garbage looking lines
+  } else {
+    // Non antialiased lines look awful when rendering with thickness != 1
+    for (int i = 0; i < num_points; i++) {
+      int j = (i + 1) == (int)points.size() ? 0 : (i + 1);
+      auto line = Math::PrimLine(points[i], points[j], t);
+      this->PrimQuad(cmd, line, vec4(0.f, 1.f, 1.f, 0.f), color);
+    }
+  }
+}
+
+PD_API void Drawlist::DrawConvexPolyFilled(const Pool<fvec2>& points,
+                                           u32 color) {
+  if (points.size() < 3) {
+    return;  // Need at least three points
+  }
+
+  // Support for Custom Textures (UV calculation)
+  float minX = points[0].x, minY = points[0].y;
+  float maxX = minX, maxY = minY;
+  // Check for the max and min Positions
+  for (const auto& it : points) {
+    if (it.x < minX) minX = it.x;
+    if (it.y < minY) minY = it.y;
+    if (it.x > maxX) maxX = it.x;
+    if (it.y > maxY) maxY = it.y;
+  }
+  // Get Short defines for UV
+  // (Bottom Right is not required)
+  auto uv_tl = pCurrentTexture.GetUV().TopLeft();
+  auto uv_tr = pCurrentTexture.GetUV().TopRight();
+  auto uv_bl = pCurrentTexture.GetUV().BotLeft();
+
+  auto& cmd = NewCommand();
+  cmd.Reserve(points.size(), (points.size() - 2) * 3);
+  // Render
+  for (int i = 2; i < (int)points.size(); i++) {
+    cmd.Add(0, i, i - 1);
+  }
+
+  for (int i = 0; i < (int)points.size(); i++) {
+    // Calculate U and V coords
+    float u =
+        uv_tl.x + ((points[i].x - minX) / (maxX - minX)) * (uv_tr.x - uv_tl.x);
+    float v =
+        uv_tl.y + ((points[i].y - minY) / (maxY - minY)) * (uv_bl.y - uv_tl.y);
+    cmd.Add(Vertex(points[i], fvec2(u, v), color));
+  }
+}
+
+PD_API void Drawlist::PrimQuad(Command& cmd, const Rect& quad, const Rect& uv,
+                               u32 color) {
+  cmd.Add(2, 1, 0);
+  cmd.Add(3, 2, 0);
+  cmd.Add(Vertex(quad.TopLeft(), uv.TopLeft(), color));
+  cmd.Add(Vertex(quad.TopRight(), uv.TopRight(), color));
+  cmd.Add(Vertex(quad.BotRight(), uv.BotRight(), color));
+  cmd.Add(Vertex(quad.BotLeft(), uv.BotLeft(), color));
+}
+
+PD_API void Drawlist::PrimTriangle(Command& cmd, const fvec2& a, const fvec2& b,
+                                   const fvec2& c, u32 color) {
+  cmd.Add(2, 1, 0);
+  cmd.Add(Vertex(a, vec2(0.f, 1.f), color));
+  cmd.Add(Vertex(b, vec2(1.f, 1.f), color));
+  cmd.Add(Vertex(c, vec2(1.f, 0.f), color));
+}
+}  // namespace Li
+}  // namespace PD

source/lithium/math.cpp

@@ -0,0 +1,65 @@
+#include <pd/lithium/math.hpp>
+
+namespace PD {
+namespace Li {
+namespace Math {
+PD_API bool InBounds(const fvec2& pos, const fvec2& size, const fvec4& rect) {
+  return (pos.x + size.x >= rect.x && pos.y + size.y >= rect.y &&
+          pos.x <= rect.z && pos.y <= rect.w);
+}
+
+PD_API bool InBounds(const fvec2& pos, const fvec4& rect) {
+  return (pos.x > rect.x && pos.x < rect.x + rect.z && pos.y > rect.y &&
+          pos.y < rect.y + rect.w);
+}
+
+PD_API bool InBounds(const fvec2& a, const fvec2& b, const fvec2& c,
+                     const fvec4& rect) {
+  return ((a.x < rect.z && b.x < rect.z && c.x < rect.z) ||
+          (a.y < rect.w && b.y < rect.w && c.y < rect.w) ||
+          (a.x > 0 && b.x > 0 && c.x > 0) || (a.y > 0 && b.y > 0 && c.y > 0));
+}
+
+PD_API void RotateCorner(fvec2& pos, float sinus, float cosinus) {
+  float x = pos.x * cosinus - pos.y * sinus;
+  float y = pos.y * cosinus - pos.x * sinus;
+  pos = fvec2(x, y);
+}
+
+PD_API Rect PrimRect(const fvec2& pos, const fvec2& size, float a) {
+  fvec2 c = size * 0.5f;  // Center
+  fvec2 corner[4] = {
+      fvec2(-c.x, -c.y),
+      fvec2(-c.x + size.x, -c.y),
+      fvec2(-c.x, -c.y + size.y),
+      fvec2(-c.x + size.x, -c.y + size.y),
+  };
+
+  // Only rotate if required
+  if (a != 0.f) {
+    float s = std::sin(a);
+    float co = std::cos(a);
+    for (int i = 0; i < 4; i++) {
+      RotateCorner(corner[i], s, co);
+    }
+  }
+
+  // Return Result
+  return Rect(corner[0] + pos + c, corner[1] + pos + c, corner[2] + pos + c,
+              corner[3] + pos + c);
+}
+
+PD_API Rect PrimLine(const fvec2& a, const fvec2& b, int t) {
+  // Using the vec maths api makes the code as short as it is
+  vec2 dir = a - b;
+  float len = dir.Len();
+  vec2 unit_dir = dir / len;
+  vec2 perpendicular(-unit_dir.y, unit_dir.x);
+  vec2 off = perpendicular * ((float)t * 0.5f);
+
+  return Rect(a + off, b + off, a - off, b - off);
+}
+
+}  // namespace Math
+}  // namespace Li
+}  // namespace PD

source/lithium/pools.cpp

@@ -6,11 +6,6 @@ namespace Li {
 PD::Pool<Vertex> pVtxPool;
 PD::Pool<u16> pIdxPool;
 
-PD_API void InitPools(size_t max_vertices) {
-  pVtxPool.Init(max_vertices);
-  pIdxPool.Init(max_vertices * 2);
-}
-
 PD_API Vertex* AllocateVertices(size_t count) {
   return pVtxPool.Allocate(count);
 }

tests/gfx/source/main.cpp

@@ -96,6 +96,7 @@ class App {
     glfwSwapInterval(1);
 #else
     gfxInitDefault();
+    consoleInit(GFX_BOTTOM, nullptr);
     C3D_Init(C3D_DEFAULT_CMDBUF_SIZE);
     Top =
         C3D_RenderTargetCreate(240, 400, GPU_RB_RGBA8, GPU_RB_DEPTH24_STENCIL8);
@@ -107,29 +108,18 @@ class App {
     PD::Gfx::UseDriver<PD::GfxCitro3D>();
 #endif
     PD::Gfx::Init();
-    PD::Li::InitPools(8192);
 #ifdef __3DS__
     pTex = LoadTex("sdmc:/icon.png");
 #else
     pTex = LoadTex("icon.png");
 #endif
-    /*std::vector<PD::u8> img(16 * 16 * 4, 0xff);
-    pTex = PD::Gfx::LoadTexture(img, 16, 16);*/
+    pList.DrawRectFilled(0, 50, 0xff00ffff);
+    pList.BindTexture(pTex);
+    pList.DrawRectFilled(50, pTex.GetSize(), 0xffffffff);
+    pList.DrawCircleFilled(500, 100, 0xffffffff, 50);
+    // pList.PathRect(300, 700, 40.f);
+    //  pList.PathFill(0xffffffff);
     std::cout << "GfxDriver: " << PD::Gfx::GetDriverName() << std::endl;
-    pPool.Init(10);
-    auto cmd = pPool.Allocate(1);
-    cmd->Reserve(4, 6);
-    cmd->Add(0, 1, 2);
-    cmd->Add(0, 2, 3);
-    cmd->Add(
-        PD::Li::Vertex(PD::fvec2(0, 0), pTex.GetUV().TopLeft(), 0xffffffff));
-    cmd->Add(PD::Li::Vertex(PD::fvec2(pTex.GetSize().x, 0),
-                            pTex.GetUV().TopRight(), 0xffffffff));
-    cmd->Add(PD::Li::Vertex(PD::fvec2(pTex.GetSize().x, pTex.GetSize().y),
-                            pTex.GetUV().BotRight(), 0xffffffff));
-    cmd->Add(PD::Li::Vertex(PD::fvec2(0, pTex.GetSize().y),
-                            pTex.GetUV().BotLeft(), 0xffffffff));
-    cmd->Tex = pTex.GetID();
   }
   ~App() {
     PD::Gfx::DeleteTexture(pTex);
@@ -168,7 +158,7 @@ class App {
 #endif
       PD::Gfx::Reset();
 
-      PD::Gfx::Draw(pPool);
+      PD::Gfx::Draw(pList);
 #ifdef __3DS__
       C3D_FrameEnd(0);
 #else
@@ -194,7 +184,7 @@ class App {
 #else
   GLFWwindow* window = nullptr;
 #endif
-  PD::Pool<PD::Li::Command> pPool;
+  PD::Li::Drawlist pList;
   PD::Li::Texture pTex;
   Driver pDriver;
 #ifdef _WIN32