126 lines
2.8 KiB
C++
126 lines
2.8 KiB
C++
#include "NametableViewer.hpp"
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#include <glad/glad.h>
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#include <imgui/imgui.h>
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#include "../Bus.hpp"
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NametableViewer::NametableViewer(Debugger* debugger, Bus* bus) :
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DebugWindow("Nametable Viewer", debugger), bus(bus), texture(0)
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{
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glCreateTextures(GL_TEXTURE_2D, 1, &texture);
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glTextureStorage2D(texture, 1, GL_R8, 32, 32);
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glTextureParameteri(texture, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTextureParameteri(texture, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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}
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NametableViewer::~NametableViewer()
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{
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glDeleteTextures(1, &texture);
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}
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void NametableViewer::OnRender()
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{
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ImGui::SetNextWindowSize(ImVec2(400, 400), ImGuiCond_FirstUseEver);
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if (!ImGui::Begin(title.c_str(), &isOpen, ImGuiWindowFlags_MenuBar))
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{
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ImGui::End();
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return;
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}
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if (ImGui::BeginMenuBar())
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{
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if (ImGui::BeginMenu("Views"))
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{
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ImGui::MenuItem("Rendered View", NULL, &renderNametable);
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ImGui::EndMenu();
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}
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ImGui::EndMenuBar();
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}
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ImGui::BeginTabBar("Nametables");
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for (uint8_t index = 0; index < 2; index++)
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{
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char baseAddress[12];
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std::sprintf(baseAddress, "Nametable %c", 'A' + index);
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if (ImGui::BeginTabItem(baseAddress))
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{
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DisplayNametable(index);
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if (renderNametable)
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{
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glTextureSubImage2D(texture, 0, 0, 0, 32, 32, GL_RED, GL_UNSIGNED_BYTE, &bus->VRAM[0x400 * index]);
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}
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ImGui::EndTabItem();
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}
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}
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ImGui::EndTabBar();
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if (renderNametable)
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{
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ImGui::SetNextWindowSize(ImVec2(400, 400), ImGuiCond_FirstUseEver);
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if (!ImGui::Begin("Rendered Nametable", &renderNametable))
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{
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ImGui::End();
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return;
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}
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float smallerSize = std::min(ImGui::GetWindowWidth(), ImGui::GetWindowHeight()) - 20.0f;
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if (smallerSize < 40.0f)
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smallerSize = 40.0f;
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ImGui::Image((ImTextureID)texture, ImVec2{smallerSize, smallerSize - 20.0f});
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ImGui::End();
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}
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ImGui::End();
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}
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void NametableViewer::DisplayNametable(uint8_t index)
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{
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Word baseAddr = 0x400 * index;
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Word displayBaseAddr = 0x2000 + baseAddr;
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if (ImGui::BeginTable("memorymap", 17))
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{
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ImGui::TableNextColumn();
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ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(0.7f, 0.7f, 0.7f, 1.0f));
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for (Byte header = 0x0; header < 0x10; header++)
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{
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ImGui::TableNextColumn();
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ImGui::Text("%X", header);
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}
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ImGui::PopStyleColor();
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for (Word hi = 0x0; hi <= 0x3F; hi++)
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{
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Byte hiOffset = hi << 4;
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ImGui::TableNextColumn();
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ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(0.7f, 0.7f, 0.7f, 1.0f));
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ImGui::Text("%04X", displayBaseAddr | hiOffset);
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ImGui::PopStyleColor();
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for (Byte lo = 0x0; lo <= 0xF; lo++)
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{
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ImGui::TableNextColumn();
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Byte entry = bus->VRAM[baseAddr | hiOffset | lo];
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if (entry == 0x00)
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ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(0.7f, 0.7f, 0.7f, 1.0f));
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ImGui::Text("%02X", entry);
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if (entry == 0x00)
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ImGui::PopStyleColor();
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}
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}
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ImGui::EndTable();
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}
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}
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