renderer: introduce text rendering

15 files changed, 302 insertions, 170 deletions

diff --git a/src/common/Font.cpp b/src/common/Font.cpp
index 82f6ad8..8f058ca 100644
--- a/src/common/Font.cpp
+++ b/src/common/Font.cpp
@@ -12,30 +12,24 @@ is_ch_ascii(char32_t ch)
     return result;
 }
 
-Font::~Font()
-{
-    delete[] m_file_content;
-}
-
-bool
-Font::Init(const char* path, int font_size)
+Font::Font(const char *path, int font_size)
 {
     if (!ReadFile(path)) {
-        return false;
+        return;
     }
 
 
-    // set font info
+    // init m_file_content, m_font_info
     if (!stbtt_InitFont(&m_font_info, (unsigned char*)m_file_content, 0))
     {
         std::cout << "stbtt_InitFont failed.\n";
         delete[] m_file_content;
         m_file_content = nullptr;
-        return false;
+        return;
     }
 
 
-    // set font settings (scale + vmetrics)
+    // init font settings
     float scale = stbtt_ScaleForPixelHeight(&m_font_info, (float)font_size);
     int baseline, ascent, descent, line_gap;
     stbtt_GetFontVMetrics(&m_font_info, &ascent, &descent, &line_gap);
@@ -44,8 +38,6 @@ Font::Init(const char* path, int font_size)
     descent  = int(scale * (float)descent);
     line_gap = int(scale * (float)line_gap);
 
-
-    // init members
     m_font_scale = scale;
     m_font_baseline = baseline;
     m_font_yadvance = ascent - descent + line_gap;
@@ -53,12 +45,14 @@ Font::Init(const char* path, int font_size)
 
     // load glyphs
     for (char c = first_ascii_ch; c <= last_ascii_ch; ++c) {
-        LoadGlyph(m_glyphs[c-first_ascii_ch], static_cast<char32_t>(c));
+        InitGlyph(m_glyphs[c-first_ascii_ch], static_cast<char32_t>(c));
     }
     memset((void*)&m_fail_glyph, 0, sizeof(m_fail_glyph));
+}
 
-
-    return true;
+Font::~Font()
+{
+    delete[] m_file_content;
 }
 
 bool
@@ -83,7 +77,7 @@ Font::ReadFile(const char* path)
 }
 
 void
-Font::LoadGlyph(Glyph& glyph, char32_t c)
+Font::InitGlyph(Glyph& glyph, char32_t c)
 {
     int bbx0, bby0, bbx1, bby1;
     stbtt_GetCodepointBitmapBox(&m_font_info, (int)c, m_font_scale, m_font_scale, &bbx0, &bby0, &bbx1, &bby1);
@@ -130,8 +124,10 @@ Font::LoadGlyph(Glyph& glyph, char32_t c)
 AlphaBitmap&
 Font::GetAlphaBitmap(char32_t c)
 {
-    if (is_ch_ascii(c)) {
-        return m_glyphs[c - first_ascii_ch].bitmap;
+    if (m_file_content) {
+        if (is_ch_ascii(c)) {
+            return m_glyphs[c - first_ascii_ch].bitmap;
+        }
     }
 
     return m_fail_glyph.bitmap;
@@ -140,8 +136,10 @@ Font::GetAlphaBitmap(char32_t c)
 Glyph&
 Font::GetGlyph(char32_t c)
 {
-    if (is_ch_ascii(c)) {
-        return m_glyphs[c - first_ascii_ch];
+    if (m_file_content) {
+        if (is_ch_ascii(c)) {
+            return m_glyphs[c - first_ascii_ch];
+        }
     }
     
     return m_fail_glyph;
diff --git a/src/common/Font.hpp b/src/common/Font.hpp
index af4ddb5..876b03a 100644
--- a/src/common/Font.hpp
+++ b/src/common/Font.hpp
@@ -23,9 +23,9 @@ struct Glyph {
 
 class Font {
 public:
+    explicit Font(const char* path, int size);
     ~Font();
 
-    bool Init(const char* path, int font_size);
     AlphaBitmap& GetAlphaBitmap(char32_t c);
     Glyph& GetGlyph(char32_t c);
 
@@ -33,7 +33,7 @@ public:
 
 private:
     bool ReadFile(const char* path);
-    void LoadGlyph(Glyph& glyph, char32_t c);
+    void InitGlyph(Glyph& glyph, char32_t c);
 
 
 private:
@@ -43,12 +43,12 @@ private:
 
 
     const char* m_file_content = nullptr;
+    stbtt_fontinfo m_font_info;
 
     float m_font_scale;
     int m_font_baseline;
     int m_font_yadvance;
 
-    stbtt_fontinfo m_font_info;
     Glyph m_glyphs[ascii_glyph_count];
     Glyph m_fail_glyph;
 };
diff --git a/src/games/Game.cpp b/src/games/Game.cpp
index 0e6af1c..c403a40 100644
--- a/src/games/Game.cpp
+++ b/src/games/Game.cpp
@@ -50,7 +50,7 @@ Game::ProcessDt()
 }
 
 void
-Game::DrawGameOverMenu()
+Game::DrawDefaultGameOverMenu()
 {
     ImGui::Begin("DefaultGameOverMenu", nullptr, s_imgui_window_flags_menu);
     ImGui::Text("Game Over.");
@@ -64,7 +64,7 @@ Game::DrawGameOverMenu()
 }
 
 void
-Game::DrawGamePausedMenu()
+Game::DrawDefaultGamePausedMenu()
 {
     ImGui::Begin("DefaultGamePauseMenu", nullptr, s_imgui_window_flags_menu);
     if (ImGui::Button("Resume")) {
diff --git a/src/games/Game.hpp b/src/games/Game.hpp
index 7de3b66..a020012 100644
--- a/src/games/Game.hpp
+++ b/src/games/Game.hpp
@@ -35,8 +35,8 @@ public:
 
 
 protected:
-    void DrawGameOverMenu();
-    void DrawGamePausedMenu();
+    void DrawDefaultGameOverMenu();
+    void DrawDefaultGamePausedMenu();
 
     float ProcessDt();
 
@@ -46,6 +46,9 @@ protected:
 
 
 protected:
+    static constexpr const char* s_dejavu_sans_filepath = "./fonts/dejavu_ttf/DejaVuSans.ttf";
+    static constexpr const char* s_dejavu_sans_mono_filepath = "./fonts/dejavu_ttf/DejaVuSansMono.ttf";
+
     static constexpr ImGuiWindowFlags s_imgui_window_flags_menu = ImGuiWindowFlags_NoFocusOnAppearing | ImGuiWindowFlags_AlwaysAutoResize;
     static constexpr ImGuiWindowFlags s_imgui_window_flags_default = ImGuiWindowFlags_NoNav | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoInputs | ImGuiWindowFlags_NoScrollbar;
 };
diff --git a/src/games/minesweeper/Minesweeper.cpp b/src/games/minesweeper/Minesweeper.cpp
index 2a69e4d..a091491 100644
--- a/src/games/minesweeper/Minesweeper.cpp
+++ b/src/games/minesweeper/Minesweeper.cpp
@@ -1,4 +1,3 @@
-#include "games/Game.hpp"
 #include <games/minesweeper/Minesweeper.hpp>
 #include <renderer/Renderer.hpp>
 
@@ -6,10 +5,15 @@
 
 #include <algorithm>
 #include <random>
-#include <cstdio>
 
 
-// Todo: winning condition (maybe: total_cells - uncovered_cells = mine_count)
+// Todo: 
+// - First click may not be a mine!
+// - Show current time spent
+// - Show current flags/mines left
+// - Permit uncovering of flagged cell
+// - Game Over: Winning Condition (maybe: total_cells - uncovered_cells == mine_count)
+// - Game Over: Show Highscore for selected difficulty
 
 
 static constexpr Color s_mine_count_colors[8] = {
@@ -25,11 +29,8 @@ static constexpr Color s_mine_count_colors[8] = {
 
 
 Minesweeper::Minesweeper()
+    : m_font{s_dejavu_sans_filepath, 22}
 {
-    bool font_init = m_font.Init(s_font_filepath, 22);
-    if (!font_init) {
-        printf("m_font.Init(...) failed\n");
-    }
 }
 
 void
@@ -148,7 +149,7 @@ Minesweeper::Update(std::vector<SDL_Event>& events)
 
     if (m_game_status == game_paused) {
         DrawBoard();
-        DrawGamePausedMenu();
+        DrawDefaultGamePausedMenu();
     }
     else if (m_game_status == game_starting) {
         DrawStartMenu();
@@ -158,7 +159,7 @@ Minesweeper::Update(std::vector<SDL_Event>& events)
     }
     else if (m_game_status == game_over) {
         DrawBoard();
-        DrawGameOverMenu();
+        DrawDefaultGameOverMenu();
     }
 
     return true;
@@ -370,7 +371,7 @@ Minesweeper::DrawBoard()
             bool is_mine = IsMine(x, y);
 
             if (is_covered) {
-                g_renderer.PushRectangle(cell_rect, 0.0f, covered_cell_color);
+                g_renderer.PushRectangle(cell_rect, covered_cell_color, 0.0f);
 
 
                 if (is_flagged) {
@@ -385,7 +386,7 @@ Minesweeper::DrawBoard()
                         flag_pos.x + flag_size.x,
                         flag_pos.y + flag_size.y,
                     };
-                    g_renderer.PushRectangle(flag_rect, flag_pos.z, flag_color);
+                    g_renderer.PushRectangle(flag_rect, flag_color, flag_pos.z);
                 }
             }
             else {
@@ -401,26 +402,21 @@ Minesweeper::DrawBoard()
                         mine_pos.x + m_cell_inner_size.x,
                         mine_pos.y + m_cell_inner_size.y,
                     };
-                    g_renderer.PushRectangle(mine_rect, mine_pos.z, mine_color);
+                    g_renderer.PushRectangle(mine_rect, mine_color, mine_pos.z);
                 }
                 else {
-                    g_renderer.PushRectangle(cell_rect, 0.0f, uncovered_cell_color);
+                    g_renderer.PushRectangle(cell_rect, uncovered_cell_color, 0.0f);
 
-                    // Todo: Figure out how to scale this properly.
-                    //       256.0f is a random number that just works for now.
                     V3F32 mine_count_pos = {
-                        256.0f * cell_pos.x,
-                        256.0f * cell_pos.y,
-                        256.0f
+                        cell_pos.x,
+                        cell_pos.y,
+                        1.0f
                     };
                     int32_t mine_count = m_adjacent_mine_counts[y*m_grid_width + x];
                     if (mine_count > 0) {
                         Color color = s_mine_count_colors[mine_count-1];
                         Glyph& glyph = m_font.GetGlyph('0' + (char32_t)mine_count);
-                        g_renderer.PushAlphaBitmap(
-                                                   glyph.bitmap,
-                                                   mine_count_pos,
-                                                   color);
+                        g_renderer.PushAlphaBitmap(glyph.bitmap, mine_count_pos, color);
                     }
                 }
             }
diff --git a/src/games/minesweeper/Minesweeper.hpp b/src/games/minesweeper/Minesweeper.hpp
index 24672f0..fbdcb30 100644
--- a/src/games/minesweeper/Minesweeper.hpp
+++ b/src/games/minesweeper/Minesweeper.hpp
@@ -4,8 +4,6 @@
 #include <common/math.hpp>
 #include <common/Font.hpp>
 
-#include <array>
-
 
 class Minesweeper : public Game {
 public:
@@ -21,11 +19,11 @@ public:
 
     bool Update(std::vector<SDL_Event>& events) override;
 
+
+private:
     void ProcessEventDuringPause(SDL_Event& event);
     void ProcessEventDuringResume(SDL_Event& event);
 
-
-private:
     void Reset(Difficulty Difficulty);
     void InitIsMineBitmap(int32_t mine_count);
     void InitAdjacentMineCounters();
@@ -50,7 +48,6 @@ private:
 private:
     static constexpr int32_t max_map_height = 32;
     static constexpr int32_t max_map_width = 32;
-    static constexpr const char* s_font_filepath = "./fonts/dejavu_ttf/DejaVuSans.ttf";
 
 
 private:
diff --git a/src/games/snake/Snake.cpp b/src/games/snake/Snake.cpp
index 7969616..542122e 100644
--- a/src/games/snake/Snake.cpp
+++ b/src/games/snake/Snake.cpp
@@ -1,10 +1,13 @@
-#include "common/defs.hpp"
-#include <chrono>
 #include <games/snake/Snake.hpp>
 #include <renderer/Renderer.hpp>
 #include <imgui.h>
 
 
+// Todo:
+// - gradiant from head to tail
+// - reduce thickness from head to tail
+
+
 std::mt19937 Snake::s_rng{std::random_device{}()};
 
 
@@ -77,10 +80,10 @@ Snake::Update(std::vector<SDL_Event> &events)
         MaybeMoveSnake(dt);
     } break;
     case game_over: {
-        DrawGameOverMenu();
+        DrawDefaultGameOverMenu();
     } break;
     case game_paused: {
-        DrawGamePausedMenu();
+        DrawDefaultGamePausedMenu();
     } break;
     case game_exit: {
         return false;
@@ -303,7 +306,7 @@ Snake::Draw()
         map_world_pos.y + map_world_dim.y
     };
     Color bg_color = {0.0f, 0.0f, 0.0f, 1.0f};
-    g_renderer.PushRectangle(map_world_rect, map_world_pos.z, bg_color);
+    g_renderer.PushRectangle(map_world_rect, bg_color, map_world_pos.z);
 
 
     /* draw snake */
@@ -332,7 +335,7 @@ Snake::Draw()
             };
 
             Color color = {0.3f, 0.3f, 0.3f, 1.0f};
-            g_renderer.PushRectangle(world_rect, world_pos.z, color);
+            g_renderer.PushRectangle(world_rect, color, world_pos.z);
             tail++;
         }
         tail = 0;
@@ -360,7 +363,7 @@ Snake::Draw()
         };
 
         Color color = {0.3f, 0.3f, 0.3f, 1.0f};
-        g_renderer.PushRectangle(world_rect, world_pos.z, color);
+        g_renderer.PushRectangle(world_rect, color, world_pos.z);
         tail++;
     }
 
@@ -379,6 +382,6 @@ Snake::Draw()
         pos.y + dim.y
     };
     Color color = {0.3f, 0.6f, 0.4f, 1.0f};
-    g_renderer.PushRectangle(rect, pos.z, color);
+    g_renderer.PushRectangle(rect, color, pos.z);
 }
 
diff --git a/src/games/tetris/Board.cpp b/src/games/tetris/Board.cpp
index 1344d5b..7f391b4 100644
--- a/src/games/tetris/Board.cpp
+++ b/src/games/tetris/Board.cpp
@@ -115,7 +115,7 @@ Board::Draw(int32_t level)
         bg_world_pos.y + bg_world_dim.y,
     };
     Color bg_color = {0.0f, 0.0f, 0.0f, 1.0f};
-    g_renderer.PushRectangle(bg_world_rect, bg_world_pos.z, bg_color);
+    g_renderer.PushRectangle(bg_world_rect, bg_color, bg_world_pos.z);
 
 
     // tetromino parts
@@ -145,7 +145,7 @@ Board::Draw(int32_t level)
 
 
                 Color color = Tetromino::GetColor(tetromino_id);
-                g_renderer.PushRectangle(world_rect, world_pos.z, color);
+                g_renderer.PushRectangle(world_rect, color, world_pos.z);
             }
         }
     }
diff --git a/src/games/tetris/Tetris.cpp b/src/games/tetris/Tetris.cpp
index aefdb41..aeb0c99 100644
--- a/src/games/tetris/Tetris.cpp
+++ b/src/games/tetris/Tetris.cpp
@@ -8,11 +8,23 @@
 #include <imgui.h>
 
 #include <fstream>
+#include <iostream>
+
+
+static 
+std::u32string
+int32_to_u32string(int32_t value)
+{
+    std::string str = std::to_string(value);
+    return std::u32string(str.begin(), str.end());
+}
+
 
 Tetris::Tetris()
-    : m_font{}
+    : m_font{s_dejavu_sans_mono_filepath, 22}
     , m_active_tetromino{m_board.m_bitmap}
 {
+    m_frame_strings.reserve(s_frame_strings_capcity);
 }
 
 void
@@ -42,6 +54,8 @@ Tetris::Update(std::vector<SDL_Event>& events)
     g_renderer.SetCameraSize(4.0f, 3.0f);
     g_renderer.Clear(clear_color);
 
+    m_frame_strings.clear();
+
 
     if (m_game_status == game_starting) {
         Start();
@@ -52,7 +66,7 @@ Tetris::Update(std::vector<SDL_Event>& events)
 
 
     if (m_game_status == game_resuming) {
-        uint32_t softdrop_count = GetSoftdropCount(dt); // side-effect: m_dt_remaining_seconds
+        uint32_t softdrop_count = GetSoftdropCount(dt);
         for (uint32_t i{0}; i < softdrop_count; i++) {
             bool moved_down = m_active_tetromino.MaybeMoveDown();
             if (!moved_down) {
@@ -70,6 +84,7 @@ Tetris::Update(std::vector<SDL_Event>& events)
         }
     }
 
+    assert(m_frame_strings.capacity() == s_frame_strings_capcity);
 
     if (m_game_status == game_exit) {
         return false;
@@ -232,7 +247,7 @@ Tetris::Draw()
     DrawScore();
 
     if (m_game_status  == game_paused) {
-        DrawGamePausedMenu();
+        DrawDefaultGamePausedMenu();
     }
     else if (m_game_status == game_over) {
         DrawGameOverMenu();
@@ -257,77 +272,87 @@ Tetris::DrawGameOverMenu()
 void
 Tetris::DrawLineCounter()
 {
-    V2F32 view_pos = {0.5f, 2.6f};
-    ImVec2 screen_pos = g_renderer.ViewPosToScreenPosImGui(view_pos);
+    static std::u32string text = U"Lines: xxx";
+    V3F32 pos = {0.5f, 2.6f, 4.0f};
+    Color color = {0.9f, 0.9f, 0.9f, 1.0f};
 
-    ImGui::SetNextWindowPos(screen_pos);
-    ImGui::Begin("TetrisLines", nullptr, s_imgui_window_flags_default);
-    ImGui::Text("LINES - %d", m_line_counter);
-    ImGui::End();
+    int line_count = std::min(m_line_counter, 999);
+
+    text[9] = U'0' + char32_t(line_count % 10);
+    line_count /= 10;
+    text[8] = U'0' + char32_t(line_count % 10);
+    line_count /= 10;
+    text[7] = U'0' + char32_t(line_count % 10);
+    line_count /= 10;
+
+
+    g_renderer.PushText(text, m_font, pos, color);
+    pos.x += 0.2f;
 }
 
 void
 Tetris::DrawStatistics()
 {
-    V2F32 view_tetrominoes_pos = {0.4f, 1.8f};
-    V2F32 view_advance = {0.0f, 0.2f};
+    V2F32 pos = {0.4f, 0.5f};
 
-    V2F32 view_text_title_pos = view_tetrominoes_pos + V2F32(0.02f, 0.4f);
-    ImVec2 screen_text_title_pos = g_renderer.ViewPosToScreenPosImGui(view_text_title_pos);
 
-    V2F32 view_text_pos = view_tetrominoes_pos + V2F32(0.4f, 0.16f);
-    V2F32 view_text_gap = {0.0f, 0.124f};
-    ImVec2 screen_text_pos = g_renderer.ViewPosToScreenPosImGui(view_text_pos);
-    ImVec2 screen_text_gap = g_renderer.ViewSizeToScreenSizeImGui(view_text_gap);
+    static std::u32string title_text = U"Statistics";
+    V3F32 title_pos = {pos.x + 0.02f, pos.y + 1.64f, s_text_z};
+    g_renderer.PushText(title_text, m_font, title_pos, s_text_color);
 
 
-    Tetromino::Draw(Tetromino::t_piece, 0, view_tetrominoes_pos, 0.5f);
-    view_tetrominoes_pos.y -= view_advance.y;
+    float yadvance = -0.2f;
+    float tetrominoes_x0 = pos.x;
+    float tetrominoes_y0 = pos.y - (float)Tetromino::id_count * yadvance;
+    V2F32 tetromino_pos = {tetrominoes_x0, tetrominoes_y0};
 
-    Tetromino::Draw(Tetromino::j_piece, 0, view_tetrominoes_pos, 0.5f);
-    view_tetrominoes_pos.y -= view_advance.y;
+    Tetromino::Draw(Tetromino::t_piece, 0, tetromino_pos, 0.5f);
+    tetromino_pos.y += yadvance;
 
-    Tetromino::Draw(Tetromino::z_piece, 0, view_tetrominoes_pos, 0.5f);
-    view_tetrominoes_pos.y -= view_advance.y;
+    Tetromino::Draw(Tetromino::j_piece, 0, tetromino_pos, 0.5f);
+    tetromino_pos.y += yadvance;
 
-    Tetromino::Draw(Tetromino::o_piece, 0, view_tetrominoes_pos, 0.5f);
-    view_tetrominoes_pos.y -= view_advance.y;
+    Tetromino::Draw(Tetromino::z_piece, 0, tetromino_pos, 0.5f);
+    tetromino_pos.y += yadvance;
 
-    Tetromino::Draw(Tetromino::s_piece, 0, view_tetrominoes_pos, 0.5f);
-    view_tetrominoes_pos.y -= view_advance.y;
+    Tetromino::Draw(Tetromino::o_piece, 0, tetromino_pos, 0.5f);
+    tetromino_pos.y += yadvance;
 
-    Tetromino::Draw(Tetromino::l_piece, 0, view_tetrominoes_pos, 0.5f);
-    view_tetrominoes_pos.y -= view_advance.y;
+    Tetromino::Draw(Tetromino::s_piece, 0, tetromino_pos, 0.5f);
+    tetromino_pos.y += yadvance;
 
-    Tetromino::Draw(Tetromino::i_piece, 0, view_tetrominoes_pos, 0.5f);
-    view_tetrominoes_pos.y -= view_advance.y;
+    Tetromino::Draw(Tetromino::l_piece, 0, tetromino_pos, 0.5f);
+    tetromino_pos.y += yadvance;
 
+    Tetromino::Draw(Tetromino::i_piece, 0, tetromino_pos, 0.5f);
+    tetromino_pos.y += yadvance;
 
-    ImGui::SetNextWindowPos(screen_text_title_pos);
-    ImGui::Begin("TetrisStatisticsTitle", nullptr, s_imgui_window_flags_default);
-    ImGui::Text("STATISTICS");
-    ImGui::End();
 
+    float counters_x0 = pos.x + 0.4f;
+    float counters_y0 = pos.y + 0.05f - yadvance * (float)Tetromino::id_count;
+    V3F32 counters_pos = {counters_x0, counters_y0, s_text_z};
 
-    ImGui::SetNextWindowPos(screen_text_pos);
-    ImGui::Begin("TetrisStatistics", nullptr, s_imgui_window_flags_default);
-
-    ImGui::Text("%d", m_tetromino_counters[Tetromino::t_piece]);
-    ImGui::Dummy(screen_text_gap);
-    ImGui::Text("%d", m_tetromino_counters[Tetromino::j_piece]);
-    ImGui::Dummy(screen_text_gap);
-    ImGui::Text("%d", m_tetromino_counters[Tetromino::z_piece]);
-    ImGui::Dummy(screen_text_gap);
-    ImGui::Text("%d", m_tetromino_counters[Tetromino::o_piece]);
-    ImGui::Dummy(screen_text_gap);
-    ImGui::Text("%d", m_tetromino_counters[Tetromino::s_piece]);
-    ImGui::Dummy(screen_text_gap);
-    ImGui::Text("%d", m_tetromino_counters[Tetromino::l_piece]);
-    ImGui::Dummy(screen_text_gap);
-    ImGui::Text("%d", m_tetromino_counters[Tetromino::i_piece]);
-    ImGui::Dummy(screen_text_gap);
+    std::u32string& t_count = m_frame_strings.emplace_back(int32_to_u32string(m_tetromino_counters[Tetromino::t_piece]));
+    std::u32string& j_count = m_frame_strings.emplace_back(int32_to_u32string(m_tetromino_counters[Tetromino::j_piece]));
+    std::u32string& z_count = m_frame_strings.emplace_back(int32_to_u32string(m_tetromino_counters[Tetromino::z_piece]));
+    std::u32string& o_count = m_frame_strings.emplace_back(int32_to_u32string(m_tetromino_counters[Tetromino::o_piece]));
+    std::u32string& s_count = m_frame_strings.emplace_back(int32_to_u32string(m_tetromino_counters[Tetromino::s_piece]));
+    std::u32string& l_count = m_frame_strings.emplace_back(int32_to_u32string(m_tetromino_counters[Tetromino::l_piece]));
+    std::u32string& i_count = m_frame_strings.emplace_back(int32_to_u32string(m_tetromino_counters[Tetromino::i_piece]));
 
-    ImGui::End();
+    g_renderer.PushText(t_count, m_font, counters_pos, s_text_color);
+    counters_pos.y += yadvance;
+    g_renderer.PushText(j_count, m_font, counters_pos, s_text_color);
+    counters_pos.y += yadvance;
+    g_renderer.PushText(z_count, m_font, counters_pos, s_text_color);
+    counters_pos.y += yadvance;
+    g_renderer.PushText(o_count, m_font, counters_pos, s_text_color);
+    counters_pos.y += yadvance;
+    g_renderer.PushText(s_count, m_font, counters_pos, s_text_color);
+    counters_pos.y += yadvance;
+    g_renderer.PushText(l_count, m_font, counters_pos, s_text_color);
+    counters_pos.y += yadvance;
+    g_renderer.PushText(i_count, m_font, counters_pos, s_text_color);
 }
 
 void
diff --git a/src/games/tetris/Tetris.hpp b/src/games/tetris/Tetris.hpp
index 03966fd..7f48e37 100644
--- a/src/games/tetris/Tetris.hpp
+++ b/src/games/tetris/Tetris.hpp
@@ -31,6 +31,10 @@ private:
 
 
 private:
+    static constexpr Color s_text_color {0.9f, 0.9f, 0.9f, 1.0f};
+    static constexpr float s_text_z {10.0f};
+    static constexpr size_t s_frame_strings_capcity {32};
+
     Font m_font;
     Board m_board;
     Tetromino m_active_tetromino;
@@ -43,6 +47,8 @@ private:
     int32_t m_level = 0;
     int32_t m_softdrop_counter = 0;
     int32_t m_highscore = 0;
+
+    std::vector<std::u32string> m_frame_strings;
 };
 
 
diff --git a/src/games/tetris/Tetromino.cpp b/src/games/tetris/Tetromino.cpp
index 2cde231..416a8df 100644
--- a/src/games/tetris/Tetromino.cpp
+++ b/src/games/tetris/Tetromino.cpp
@@ -233,7 +233,7 @@ Tetromino::Draw(Id id, int32_t ori, V2F32 pos, float scale)
 
 
                 Color color = GetColor(id);
-                g_renderer.PushRectangle(world_rect, world_pos.z, color);
+                g_renderer.PushRectangle(world_rect, color, world_pos.z);
             }
         }
     }
diff --git a/src/renderer/RSoftwareBackend.cpp b/src/renderer/RSoftwareBackend.cpp
index 4d78ec7..d05cee7 100644
--- a/src/renderer/RSoftwareBackend.cpp
+++ b/src/renderer/RSoftwareBackend.cpp
@@ -1,3 +1,4 @@
+#include "imgui.h"
 #include <renderer/RSoftwareBackend.hpp>
 
 #include <SDL3/SDL_video.h>
@@ -8,9 +9,8 @@
 #include <cstdio>
 
 
-RSoftwareBackend::RSoftwareBackend(SDL_Window* window, Renderer& renderer)
-    : m_window {window}
-    , m_renderer {renderer}
+RSoftwareBackend::RSoftwareBackend(Renderer& renderer)
+    : m_renderer {renderer}
 {
     m_canvas.rshift = 0;
     m_canvas.gshift = 8;
@@ -53,21 +53,7 @@ RSoftwareBackend::Draw()
     SortRenderEntities();
 
 
-    REntity_Rectangle clear_rect = {
-        REntityType_Rectangle,
-        {0, 0, (float)(m_canvas.w-1), (float)(m_canvas.h-1)},
-        0.0f,
-        m_renderer.m_clear_color
-    };
-    DrawRectangle(clear_rect);
-
-
-    float z = -1;
     for (RSortEntry sort_entry : m_renderer.m_sort_entries) {
-        if (sort_entry.z >= z) {
-            z = sort_entry.z;
-        }
-
         REntity& entity = m_renderer.m_render_entities[sort_entry.entity_index];
         switch (entity.type) {
         case REntityType_Rectangle: {
@@ -78,6 +64,13 @@ RSoftwareBackend::Draw()
             DrawAlphaBitmap(entity.bitmap);
         } break;
 
+        case REntityType_Text: {
+            DrawText(entity.text);
+        }; break;
+
+        case REntityType_Circle: {
+        }; break;
+
         default:;
         }
     }
@@ -147,10 +140,10 @@ RSoftwareBackend::DrawRectangle(REntity_Rectangle& entity)
 void
 RSoftwareBackend::DrawAlphaBitmap(REntity_AlphaBitmap& entity)
 {
-    int32_t x0 = (int32_t)entity.pos.x;
-    int32_t y0 = (int32_t)entity.pos.y;
-    int32_t x1 = (int32_t)entity.pos.x + entity.bitmap.w - 1;
-    int32_t y1 = (int32_t)entity.pos.y + entity.bitmap.h - 1;
+    int32_t x0 = m_renderer.WorldXToScreenX(entity.pos.x);
+    int32_t y0 = m_renderer.WorldYToScreenY(entity.pos.y);
+    int32_t x1 = x0 + entity.bitmap.w - 1;
+    int32_t y1 = y0 + entity.bitmap.h - 1;
 
     int32_t cut_left = 0;
     int32_t cut_bot = 0;
@@ -171,10 +164,6 @@ RSoftwareBackend::DrawAlphaBitmap(REntity_AlphaBitmap& entity)
     }
 
 
-    uint32_t rshift = m_canvas.rshift;
-    uint32_t gshift = m_canvas.gshift;
-    uint32_t bshift = m_canvas.bshift;
-
     uint8_t* alpha_row = (uint8_t*)entity.bitmap.pixels.get() + (-cut_bot * entity.bitmap.w) + (-cut_left);
     uint32_t* rgba_row = m_canvas.pixels + y0 * m_canvas.w + x0;
     for (int32_t y = y0; y <= y1; y++) {
@@ -193,9 +182,9 @@ RSoftwareBackend::DrawAlphaBitmap(REntity_AlphaBitmap& entity)
             float g1 = entity.color.g * alphaf;
             float b1 = entity.color.b * alphaf;
 
-            uint32_t r2 = uint32_t(r1 * 255.0f) << rshift;
-            uint32_t g2 = uint32_t(g1 * 255.0f) << gshift;
-            uint32_t b2 = uint32_t(b1 * 255.0f) << bshift;
+            uint32_t r2 = uint32_t(r1 * 255.0f) << m_canvas.rshift;
+            uint32_t g2 = uint32_t(g1 * 255.0f) << m_canvas.gshift;
+            uint32_t b2 = uint32_t(b1 * 255.0f) << m_canvas.bshift;
 
             uint32_t rgba_result = r2 | g2 | b2;
             *rgba = rgba_result;
@@ -209,3 +198,81 @@ RSoftwareBackend::DrawAlphaBitmap(REntity_AlphaBitmap& entity)
     }
 }
 
+void
+RSoftwareBackend::DrawText(REntity_Text& entity)
+{
+    int32_t xscreen = m_renderer.WorldXToScreenX(entity.pos.x);
+    int32_t yscreen = m_renderer.WorldYToScreenY(entity.pos.y);
+    for (char32_t ch : entity.text) {
+        Glyph& glyph = entity.font.GetGlyph(ch);
+
+        int32_t x = xscreen + glyph.xoff;
+        int32_t y = yscreen + glyph.yoff;
+        DrawTextGlyph(glyph, entity.color, x, y);
+
+        xscreen += glyph.xadvance;
+    }
+}
+
+void
+RSoftwareBackend::DrawTextGlyph(Glyph& glyph, Color color, int32_t xscreen, int32_t yscreen)
+{
+    int32_t x0 = xscreen;
+    int32_t y0 = yscreen;
+    int32_t x1 = x0 + glyph.bitmap.w - 1;
+    int32_t y1 = y0 + glyph.bitmap.h - 1;
+
+    int32_t cut_left = 0;
+    int32_t cut_bot = 0;
+
+    if (x0 < 0) {
+        cut_left = x0;
+        x0 = 0;
+    }
+    if (y0 < 0) {
+        cut_bot = y0;
+        y0 = 0;
+    }
+    if (x1 >= m_canvas.w) {
+        x1 = m_canvas.w - 1;
+    }
+    if (y1 >= m_canvas.h) {
+        y1 = m_canvas.h - 1;
+    }
+
+
+    uint8_t* alpha_row = (uint8_t*)glyph.bitmap.pixels.get() + (-cut_bot * glyph.bitmap.w) + (-cut_left);
+    uint32_t* rgba_row = m_canvas.pixels + y0 * m_canvas.w + x0;
+
+    for (int32_t y = y0; y <= y1; y++) {
+        uint8_t* alpha = alpha_row;
+        uint32_t* rgba = rgba_row;
+        for (int32_t x = x0; x <= x1; x++) {
+            if (*alpha == 0) {
+                alpha++;
+                rgba++;
+                continue;
+            }
+
+            float alphaf = *alpha / 255.0f;
+
+            float r1 = color.r * alphaf;
+            float g1 = color.g * alphaf;
+            float b1 = color.b * alphaf;
+
+            uint32_t r2 = uint32_t(r1 * 255.0f) << m_canvas.rshift;
+            uint32_t g2 = uint32_t(g1 * 255.0f) << m_canvas.gshift;
+            uint32_t b2 = uint32_t(b1 * 255.0f) << m_canvas.bshift;
+
+            uint32_t rgba_result = r2 | g2 | b2;
+            *rgba = rgba_result;
+
+            alpha++;
+            rgba++;
+        }
+
+        alpha_row += glyph.bitmap.w;
+        rgba_row += m_canvas.w;
+    }
+}
+
diff --git a/src/renderer/RSoftwareBackend.hpp b/src/renderer/RSoftwareBackend.hpp
index 89d6a52..3e5e17d 100644
--- a/src/renderer/RSoftwareBackend.hpp
+++ b/src/renderer/RSoftwareBackend.hpp
@@ -16,11 +16,19 @@ public:
         uint32_t* pixels;
     };
 
+    struct DestRect {
+        int32_t x0;
+        int32_t y0;
+        int32_t x1;
+        int32_t y1;
+    };
+
 
 public:
-    RSoftwareBackend(SDL_Window* window, Renderer& renderer);
+    RSoftwareBackend(Renderer& renderer);
 
     void Draw();
+    void Clear(Color color);
 
 
 private:
@@ -29,10 +37,11 @@ private:
 
     void DrawRectangle(REntity_Rectangle& entity);
     void DrawAlphaBitmap(REntity_AlphaBitmap& entity);
+    void DrawText(REntity_Text& entity);
+    void DrawTextGlyph(Glyph& glyph, Color color, int32_t xscreen, int32_t yscreen);
 
 
 private:
-    SDL_Window* m_window{};
     Renderer& m_renderer;
 
     uint32_t m_gltexture_id{};
diff --git a/src/renderer/Renderer.cpp b/src/renderer/Renderer.cpp
index 4e449ba..956c488 100644
--- a/src/renderer/Renderer.cpp
+++ b/src/renderer/Renderer.cpp
@@ -13,16 +13,10 @@ Renderer g_renderer;
 void
 Renderer::Init(SDL_Window* window)
 {
+    m_window = window;
     m_render_entities.reserve(1024);
     m_sort_entries.reserve(1024);
-
-    m_backend = std::make_unique<RSoftwareBackend>(window, *this);
-}
-
-void
-Renderer::Draw()
-{
-    m_backend->Draw();
+    m_backend = std::make_unique<RSoftwareBackend>(*this);
 }
 
 void
@@ -30,12 +24,16 @@ Renderer::Reset()
 {
     m_render_entities.clear();
     m_sort_entries.clear();
-    m_render_entities.reserve(1024);
-    m_sort_entries.reserve(1024);
     SetCameraSize(0.0f, 0.0f);
 }
 
 void
+Renderer::Draw()
+{
+    m_backend->Draw();
+}
+
+void
 Renderer::SetScreenSize(int32_t w, int32_t h)
 {
     m_screen_w = w;
@@ -66,7 +64,13 @@ Renderer::WorldYToScreenY(float world_y)
 void
 Renderer::Clear(Color color)
 {
-    m_clear_color = color;
+    Rectangle rect = {
+        0.0f,
+        0.0f,
+        m_camera_w,
+        m_camera_h
+    };
+    PushRectangle(rect, color, -1.0f);
 }
 
 void
@@ -74,37 +78,48 @@ Renderer::PushAlphaBitmap(AlphaBitmap& bitmap, V3F32 pos, Color color)
 {
     m_render_entities.emplace_back(REntity{.bitmap{
             REntityType_AlphaBitmap,
-            pos,
             bitmap,
+            pos,
             color
     }});
     m_sort_entries.emplace_back(pos.z, m_render_entities.size()-1);
 }
 
 void
-Renderer::PushRectangle(Rectangle rect, float z, Color color)
+Renderer::PushRectangle(Rectangle rect, Color color, float z)
 {
     m_render_entities.emplace_back(REntity{.rect{
             REntityType_Rectangle,
             rect,
-            z,
             color
     }});
     m_sort_entries.emplace_back(z, m_render_entities.size()-1);
 }
 
 void
-Renderer::PushCircle(Circle circle, float z, Color color)
+Renderer::PushCircle(Circle circle, Color color, float z)
 {
     m_render_entities.emplace_back(REntity{.circle{
             REntityType_Circle,
             circle,
-            z,
             color
     }});
     m_sort_entries.emplace_back(z, m_render_entities.size()-1);
 }
 
+void
+Renderer::PushText(std::u32string& text, Font& font, V3F32 pos, Color color)
+{
+    m_render_entities.emplace_back(REntity{.text{
+            REntityType_Text,
+            text,
+            font,
+            pos,
+            color
+    }});
+    m_sort_entries.emplace_back(pos.z, m_render_entities.size()-1);
+}
+
 
 /* temporary helper functions (from old RGroup api) */
 
diff --git a/src/renderer/Renderer.hpp b/src/renderer/Renderer.hpp
index b825681..515e1da 100644
--- a/src/renderer/Renderer.hpp
+++ b/src/renderer/Renderer.hpp
@@ -22,34 +22,44 @@ enum REntityType : int32_t {
     REntityType_Rectangle,
     REntityType_AlphaBitmap,
     REntityType_Circle,
+    REntityType_Text,
 };
 
+
 struct REntity_AlphaBitmap {
     REntityType type;
-    V3F32 pos;
     AlphaBitmap& bitmap;
+    V3F32 pos;
     Color color;
 };
 
 struct REntity_Rectangle {
     REntityType type;
     Rectangle rect;
-    float z;
     Color color;
 };
 
 struct REntity_Circle {
     REntityType type;
     Circle circle;
-    float z;
     Color color;
 };
 
+struct REntity_Text {
+    REntityType type;
+    std::u32string& text;
+    Font& font;
+    V3F32 pos;
+    Color color;
+};
+
+
 union REntity {
     REntityType type;
     REntity_AlphaBitmap bitmap;
     REntity_Rectangle rect;
     REntity_Circle circle;
+    REntity_Text text;
 };
 
 struct RSortEntry {
@@ -69,9 +79,10 @@ public:
     void Reset();
 
     void Clear(Color color);
-    void PushRectangle(Rectangle rect, float z, Color color);
     void PushAlphaBitmap(AlphaBitmap& bitmap, V3F32 pos, Color color);
-    void PushCircle(Circle circle, float z, Color color);
+    void PushRectangle(Rectangle rect, Color color, float z);
+    void PushCircle(Circle circle, Color color, float z);
+    void PushText(std::u32string& text, Font& font, V3F32 pos, Color color);
 
 
     /* helper functions */
@@ -98,6 +109,8 @@ public:
 
 
 public:
+    SDL_Window* m_window;
+
     int32_t m_screen_w;
     int32_t m_screen_h;