implemented font redering

[blank.git] / src / model / model.cpp

diff --git a/src/model/model.cpp b/src/model/model.cpp
index 423e00d842150202a6948cc6ec3ad4be879a12b9..4e000806cff56c2812f9aaa42fc459c642cc29ca 100644 (file)
--- a/src/model/model.cpp
+++ b/src/model/model.cpp
@@ -1,6 +1,7 @@
 #include "BlockModel.hpp"
 #include "Model.hpp"
 #include "OutlineModel.hpp"
+#include "SpriteModel.hpp"
 
 #include <iostream>
 
@@ -287,4 +288,114 @@ void OutlineModel::Draw() noexcept {
        );
 }
 
+
+SpriteModel::SpriteModel() noexcept
+: vertices()
+, coords()
+, indices()
+, va(0)
+, handle{}
+, dirty(false) {
+       glGenVertexArrays(1, &va);
+       glGenBuffers(ATTRIB_COUNT, handle);
+}
+
+SpriteModel::~SpriteModel() noexcept {
+       glDeleteBuffers(ATTRIB_COUNT, handle);
+       glDeleteVertexArrays(1, &va);
+}
+
+
+void SpriteModel::Clear() noexcept {
+       vertices.clear();
+       coords.clear();
+       indices.clear();
+       Invalidate();
+}
+
+void SpriteModel::Reserve(int v, int i) {
+       vertices.reserve(v);
+       coords.reserve(v);
+       indices.reserve(i);
+}
+
+
+void SpriteModel::LoadRect(
+       float w, float h,
+       const glm::vec2 &pivot,
+       const glm::vec2 &tex_begin,
+       const glm::vec2 &tex_end
+) {
+       Clear();
+       Reserve(4, 6);
+
+       vertices.emplace_back( -pivot.x,  -pivot.y, 0.0f);
+       vertices.emplace_back(w-pivot.x,  -pivot.y, 0.0f);
+       vertices.emplace_back( -pivot.x, h-pivot.y, 0.0f);
+       vertices.emplace_back(w-pivot.x, h-pivot.y, 0.0f);
+
+       coords.emplace_back(tex_begin.x, tex_begin.y);
+       coords.emplace_back(tex_end.x,   tex_begin.y);
+       coords.emplace_back(tex_begin.x, tex_end.y);
+       coords.emplace_back(tex_end.x,   tex_end.y);
+
+       indices.assign({ 0, 2, 1, 1, 2, 3 });
+
+       Invalidate();
+}
+
+
+void SpriteModel::Update() noexcept {
+       glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_VERTEX]);
+       glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(Position), vertices.data(), GL_STATIC_DRAW);
+       glEnableVertexAttribArray(ATTRIB_VERTEX);
+       glVertexAttribPointer(
+               ATTRIB_VERTEX, // location (for shader)
+               3,             // size
+               GL_FLOAT,      // type
+               GL_FALSE,      // normalized
+               0,             // stride
+               nullptr        // offset
+       );
+
+#ifndef NDEBUG
+       if (coords.size() < vertices.size()) {
+               std::cerr << "SpriteModel: not enough coords!" << std::endl;
+               coords.resize(vertices.size(), { 1, 1 });
+       }
+#endif
+       glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_TEXCOORD]);
+       glBufferData(GL_ARRAY_BUFFER, coords.size() * sizeof(TexCoord), coords.data(), GL_STATIC_DRAW);
+       glEnableVertexAttribArray(ATTRIB_TEXCOORD);
+       glVertexAttribPointer(
+               ATTRIB_TEXCOORD, // location (for shader)
+               2,               // size
+               GL_FLOAT,        // type
+               GL_FALSE,        // normalized
+               0,               // stride
+               nullptr          // offset
+       );
+
+       glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, handle[ATTRIB_INDEX]);
+       glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(Index), indices.data(), GL_STATIC_DRAW);
+
+       dirty = false;
+}
+
+
+void SpriteModel::Draw() noexcept {
+       glBindVertexArray(va);
+
+       if (dirty) {
+               Update();
+       }
+
+       glDrawElements(
+               GL_TRIANGLES,      // how
+               indices.size(),    // count
+               GL_UNSIGNED_SHORT, // type
+               nullptr            // offset
+       );
+}
+
 }