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#include "RendererWidget.hpp"
const GLfloat vertices[] = {
0.0f,0.0f,0.0f,
1.0f,1.0f,0.0f,
0.0f,1.0f,0.0f,
0.0f,0.0f,0.0f,
1.0f,0.0f,0.0f,
1.0f,1.0f,0.0f,
};
const GLfloat uvs[] = {
0.0f,0.0f,
1.0f,1.0f,
0.0f,1.0f,
0.0f,0.0f,
1.0f,0.0f,
1.0f,1.0f,
};
static GLuint VboVertices, VboUvs, Vao;
static Shader* guiShader = nullptr;
RendererWidget::RendererWidget(RootWidget *widget) {
this->tree = widget;
if (guiShader == nullptr) {
guiShader = new Shader("./shaders/gui.vs", "./shaders/gui.fs");
guiShader->Use();
glUniform1i(glGetUniformLocation(guiShader->Program, "textureAtlas"), 0);
glGenBuffers(1, &VboVertices);
glBindBuffer(GL_ARRAY_BUFFER, VboVertices);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glGenBuffers(1, &VboUvs);
glBindBuffer(GL_ARRAY_BUFFER, VboUvs);
glBufferData(GL_ARRAY_BUFFER, sizeof(uvs), uvs, GL_STATIC_DRAW);
glGenVertexArrays(1, &Vao);
glBindVertexArray(Vao);
{
glBindBuffer(GL_ARRAY_BUFFER, VboVertices);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, VboUvs);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(1);
}
glBindVertexArray(0);
}
}
RendererWidget::~RendererWidget() {
}
void RendererWidget::Render(RenderState &state) {
state.SetActiveVao(Vao);
state.SetActiveShader(guiShader->Program);
auto toRender = tree->GetRenderList();
for (auto& it : toRender) {
auto[x, y, w, h] = it->GetTexture();
glUniform4f(glGetUniformLocation(guiShader->Program, "widgetTexture"), x, y, w, h);
glUniform4f(glGetUniformLocation(guiShader->Program, "transform"), it->x, it->y, it->w, it->h);
glDrawArrays(GL_TRIANGLES, 0, 36);
}
glCheckError();
}
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