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image display, two columns

This commit is contained in:
Sebastien Bourdeauducq 2023-08-23 13:12:28 +08:00
parent afa0145241
commit fb2bafb215
1 changed files with 49 additions and 7 deletions
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56
main.cpp
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@ -10,7 +10,7 @@ int main(int, char**)
return 1;
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
GLFWwindow* window = glfwCreateWindow(1280, 720, "microsa", nullptr, nullptr);
GLFWwindow* window = glfwCreateWindow(1900, 720, "microsa", nullptr, nullptr);
if (window == nullptr) {
glfwTerminate();
return 1;
@ -18,29 +18,71 @@ int main(int, char**)
glfwMakeContextCurrent(window);
glfwSwapInterval(1);
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
ImGuiIO& io = ImGui::GetIO();
io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
ImGui::StyleColorsDark();
ImGui_ImplGlfw_InitForOpenGL(window, true);
ImGui_ImplOpenGL3_Init("#version 130");
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
while (!glfwWindowShouldClose(window)) {
int waterfall_width = 1600;
int waterfall_height = 700;
unsigned int waterfall_data[1600*700];
GLuint waterfall;
glGenTextures(1, &waterfall);
glBindTexture(GL_TEXTURE_2D, waterfall);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
int t = 0;
bool exit = false;
while (!exit && !glfwWindowShouldClose(window)) {
glfwPollEvents();
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
t++;
for(int y=0;y<waterfall_height;y++)
for(int x=0;x<waterfall_width;x++)
waterfall_data[y*waterfall_width+x] = (x+y+t) | 0xff000000;
glBindTexture(GL_TEXTURE_2D, waterfall);
#if defined(GL_UNPACK_ROW_LENGTH) && !defined(__EMSCRIPTEN__)
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
#endif
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, waterfall_width, waterfall_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, waterfall_data);
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
ImGui::SetNextWindowPos(ImVec2(0.0f, 0.0f));
ImGui::SetNextWindowSize(io.DisplaySize);
ImGui::PushStyleVar(ImGuiStyleVar_WindowRounding, 0.0f);
ImGui::Begin("microsa", nullptr, ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoResize);
ImGui::BeginTable("microsa", 2, ImGuiTableFlags_SizingStretchSame | ImGuiTableFlags_Resizable);
ImGui::TableSetupColumn("", 0, 280.0);
ImGui::TableSetupColumn("", 0, 1600.0);
ImGui::TableNextColumn();
if(ImGui::Button("Exit"))
exit = true;
ImGui::TableNextColumn();
ImGui::Image((void*)(intptr_t)waterfall, ImVec2(waterfall_width, waterfall_height));
ImGui::EndTable();
ImGui::End();
ImGui::PopStyleVar(1);
// Rendering
ImGui::Render();
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
int display_w, display_h;
glfwGetFramebufferSize(window, &display_w, &display_h);
glViewport(0, 0, display_w, display_h);
glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
glClear(GL_COLOR_BUFFER_BIT);
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
glfwSwapBuffers(window);
}