stbtt text testing succesful

engine.xcodeproj/project.pbxproj

@@ -22,6 +22,8 @@
 		AD58E0761E3421F2006ACC15 /* YGNodeList.c in Sources */ = {isa = PBXBuildFile; fileRef = AD58E0741E3421F2006ACC15 /* YGNodeList.c */; };
 		AD58E0771E3421F2006ACC15 /* Yoga.c in Sources */ = {isa = PBXBuildFile; fileRef = AD58E0751E3421F2006ACC15 /* Yoga.c */; };
 		AD58E0791E342205006ACC15 /* tinyxml2.cpp in Sources */ = {isa = PBXBuildFile; fileRef = AD58E0781E342205006ACC15 /* tinyxml2.cpp */; };
+		AD95AEC61E41EDEC002DD03A /* font.cpp in Sources */ = {isa = PBXBuildFile; fileRef = AD95AEC31E41EDEC002DD03A /* font.cpp */; };
+		AD95AEC71E41EDEC002DD03A /* pch.cpp in Sources */ = {isa = PBXBuildFile; fileRef = AD95AEC51E41EDEC002DD03A /* pch.cpp */; };
 		ADB61C821E3D38450093280F /* util.cpp in Sources */ = {isa = PBXBuildFile; fileRef = ADB61C801E3D38450093280F /* util.cpp */; };
 /* End PBXBuildFile section */
 
@@ -62,6 +64,9 @@
 		AD58E0741E3421F2006ACC15 /* YGNodeList.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = YGNodeList.c; path = libs/yoga/yoga/YGNodeList.c; sourceTree = "<group>"; };
 		AD58E0751E3421F2006ACC15 /* Yoga.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = Yoga.c; path = libs/yoga/yoga/Yoga.c; sourceTree = "<group>"; };
 		AD58E0781E342205006ACC15 /* tinyxml2.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = tinyxml2.cpp; path = libs/tinyxml2/tinyxml2.cpp; sourceTree = "<group>"; };
+		AD95AEC31E41EDEC002DD03A /* font.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = font.cpp; sourceTree = "<group>"; };
+		AD95AEC41E41EDEC002DD03A /* font.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = font.h; sourceTree = "<group>"; };
+		AD95AEC51E41EDEC002DD03A /* pch.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = pch.cpp; sourceTree = "<group>"; };
 		ADB61C801E3D38450093280F /* util.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = util.cpp; sourceTree = "<group>"; };
 		ADB61C811E3D38450093280F /* util.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = util.h; sourceTree = "<group>"; };
 /* End PBXFileReference section */
@@ -106,6 +111,9 @@
 		AD58E0511E107411006ACC15 /* engine */ = {
 			isa = PBXGroup;
 			children = (
+				AD95AEC31E41EDEC002DD03A /* font.cpp */,
+				AD95AEC41E41EDEC002DD03A /* font.h */,
+				AD95AEC51E41EDEC002DD03A /* pch.cpp */,
 				AD3B1EBE1E3B8B7600E918E3 /* layout.cpp */,
 				AD3B1EBF1E3B8B7600E918E3 /* layout.h */,
 				AD58E0631E2A76FD006ACC15 /* shader.cpp */,
@@ -200,9 +208,11 @@
 				AD58E06B1E2A774F006ACC15 /* texture.cpp in Sources */,
 				AD3B1EC01E3B8B7600E918E3 /* layout.cpp in Sources */,
 				AD58E0721E2A90EF006ACC15 /* app.cpp in Sources */,
+				AD95AEC61E41EDEC002DD03A /* font.cpp in Sources */,
 				AD58E0531E107411006ACC15 /* main.cpp in Sources */,
 				AD58E0681E2A7741006ACC15 /* image.cpp in Sources */,
 				AD58E0771E3421F2006ACC15 /* Yoga.c in Sources */,
+				AD95AEC71E41EDEC002DD03A /* pch.cpp in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

engine/app.cpp

@@ -55,14 +55,12 @@ void App::init()
     static const char* shader_font_v =
         "#version 150\n"
         "uniform mat4 mvp;"
-        "uniform vec2 texoff;"
-        "uniform vec2 texsz;"
-        "in vec4 pos;"
+        "in vec2 pos;"
         "in vec2 uvs;"
         "out vec2 uv;"
         "void main(){"
-        "   uv = texoff + uvs * texsz;"
-        "   gl_Position = mvp * vec4(pos.xyz, 1.f);"
+        "   uv = uvs;"
+        "   gl_Position = mvp * vec4(pos, 0, 1);"
         "}";
     static const char* shader_font_f =
         "#version 150\n"
@@ -70,7 +68,8 @@ void App::init()
         "in vec2 uv;"
         "out vec4 frag;"
         "void main(){"
-        "   frag = texture(tex, uv.xy);"
+        //"   frag = vec4(1,0,0,1);"
+        "   frag = texture(tex, uv);"
         "}";
 
 #ifdef _WIN32
@@ -107,21 +106,35 @@ void App::init()
     if (!tex.load("data/uvs.jpg"))
         printf("error loading image\n");
 
+#if _WIN32
     FILE* font_file = fopen("C:\\Windows\\Fonts\\arial.ttf", "rb");
+#else
+    FILE* font_file = fopen("/Library/Fonts/Arial.ttf", "rb");
+#endif
     if (font_file)
     {
         fseek(font_file, 0, SEEK_END);
         long sz = ftell(font_file);
         auto data = std::make_unique<uint8_t[]>(sz);
         fseek(font_file, 0, SEEK_SET);
-        int bytes = fread(data.get(), 1, sz, font_file);
-        int w = 512;
-        int h = 512;
-        int num_chars = 96;
+        auto bytes = fread(data.get(), 1, sz, font_file);
+        assert(bytes==sz);
         auto bitmap = std::make_unique<uint8_t[]>(w*h);
         chars.resize(num_chars);
-        int ret = stbtt_BakeFontBitmap(data.get(), 0, 50, bitmap.get(), w, h, 32, num_chars, chars.data());
+        int ret = stbtt_BakeFontBitmap(data.get(), 0, 50, bitmap.get(), w, h, start_char, num_chars, chars.data());
         font_tex.create(w, h, GL_RED, bitmap.get());
+        
+        glGenBuffers(2, font_buffers);
+        glGenVertexArrays(1, &font_array);
+        
+        glBindVertexArray(font_array);
+        glEnableVertexAttribArray(0);
+        glEnableVertexAttribArray(1);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, font_buffers[1]);
+        glBindBuffer(GL_ARRAY_BUFFER, font_buffers[0]);
+        glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(glm::vec4), (GLvoid*)0);
+        glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(glm::vec4), (GLvoid*)(sizeof(float)*2));
+        glBindVertexArray(0);
     }
     plane.create<1>(400, 400);
     
@@ -159,6 +172,7 @@ void App::update(float dt)
         layout[main_id].update(width, height);
     }
 
+    /*
     glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
     glEnable(GL_SCISSOR_TEST);
     for (auto& n : layout[main_id])
@@ -171,10 +185,65 @@ void App::update(float dt)
         }
     }
     glDisable(GL_SCISSOR_TEST); 
-
+*/
     glm::mat4 proj = glm::ortho(0.f, width, height, 0.f, -1.f, 1.f);
     glm::mat4 tran = glm::translate(glm::vec3(200, 200, 0));
 
+
+    if (chars.size())
+    {
+        static char str[64];
+        static int counter = 0;
+        counter++;
+        sprintf(str, "frame %04d", counter);
+        const auto len = strlen(str);
+        float x = 0;
+        float y = 0;
+        std::vector<glm::vec4> v;
+        std::vector<GLushort> idx;
+        for (int i = 0; i < len; i++)
+        {
+            int c = str[i] - start_char;
+            stbtt_aligned_quad q;
+            stbtt_GetBakedQuad(chars.data(), w, h, c, &x, &y, &q, true);
+            auto n = v.size();
+            v.emplace_back(q.x0, q.y1, q.s0, q.t1);
+            v.emplace_back(q.x0, q.y0, q.s0, q.t0);
+            v.emplace_back(q.x1, q.y0, q.s1, q.t0);
+            v.emplace_back(q.x1, q.y1, q.s1, q.t1);
+            idx.push_back(n+0);
+            idx.push_back(n+1);
+            idx.push_back(n+2);
+            idx.push_back(n+0);
+            idx.push_back(n+2);
+            idx.push_back(n+3);
+        }
+        font_array_count = (int)idx.size();
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, font_buffers[1]);
+        glBufferData(GL_ELEMENT_ARRAY_BUFFER, idx.size() * sizeof(GLushort), idx.data(), GL_STATIC_DRAW);
+        glBindBuffer(GL_ARRAY_BUFFER, font_buffers[0]);
+        glBufferData(GL_ARRAY_BUFFER, v.size() * sizeof(glm::vec4), v.data(), GL_STATIC_DRAW);
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+    }
+
+    glActiveTexture(GL_TEXTURE0);
+    font_tex.bind();
+    sampler.bind(0);
+    ShaderManager::use(kShader::Font);
+    ShaderManager::u_int(kShaderUniform::Tex, 0);
+    ShaderManager::u_mat4(kShaderUniform::MVP, proj*tran);
+    
+//    plane.draw_fill();
+    glBindVertexArray(font_array);
+    glDrawElements(GL_TRIANGLES, font_array_count, GL_UNSIGNED_SHORT, 0);
+    glBindVertexArray(0);
+    
+    font_tex.unbind();
+    sampler.unbind();
+
+
+/*
     static int i = 0;
     i = (i + 1) % 32;
     auto c = chars["hgfrr56789opk0876ryuewighfcuisdbn"[i] - 32];
@@ -195,6 +264,7 @@ void App::update(float dt)
     //plane.draw_fill();
     font_tex.unbind();
     sampler.unbind();
+ */
 }
 
 void App::resize(float w, float h)

engine/app.h

@@ -14,6 +14,13 @@ class App
     Texture2D font_tex;
     std::vector<stbtt_bakedchar> chars;
     Plane plane;
+    GLuint font_array;
+    int font_array_count = 0;
+    GLuint font_buffers[2];
+    const int w = 512;
+    const int h = 512;
+    const int num_chars = 96;
+    const int start_char = 32;
 public:
     static App I;
     float width;

engine/layout.cpp

@@ -266,10 +266,10 @@ bool LayoutManager::load(const char* path)
         }
         printf("Parsing layout: %s\n", id_str);
         uint16_t id = const_hash(id_str);
-        auto& p = m_layouts.try_emplace(id);
-        if (p.second)
+        auto p = m_layouts.find(id);
+        if (p == m_layouts.end())
         {
-            auto& node = p.first->second;
+            auto& node = m_layouts[id];
             node.m_manager = this;
             // try to copy the old size values
             if (old.count(id))

engine/layout.h

@@ -87,7 +87,7 @@ public:
         ShaderManager::u_vec4(kShaderUniform::Col, m_border_color);
         m_plane.draw_stroke();
     }
-    virtual void parse_attributes(kAttribute id, const tinyxml2::XMLAttribute* attr)
+    virtual void parse_attributes(kAttribute id, const tinyxml2::XMLAttribute* attr) override
     {
         switch (id)
         {
@@ -114,6 +114,8 @@ public:
         case kAttribute::Thickness:
             m_thinkness = attr->FloatValue();
             break;
+        default:
+            break;
         }
     }
 };
@@ -169,7 +171,7 @@ public:
         ShaderManager::u_vec4(kShaderUniform::Col, m_border_color);
         m_shape->draw_stroke();
     }
-    virtual void parse_attributes(kAttribute id, const tinyxml2::XMLAttribute* attr)
+    virtual void parse_attributes(kAttribute id, const tinyxml2::XMLAttribute* attr) override
     {
         switch (id)
         {
@@ -199,6 +201,8 @@ public:
         case kAttribute::Type:
             m_type = (kShapeType)const_hash(attr->Value());
             break;
+        default:
+            break;
         }
     }
 };

engine/util.cpp

@@ -1,3 +1,3 @@
 #include "pch.h"
-#include "util.hpp"
+#include "util.h"