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lity3d/Engine/UI/ui.c
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shuiyu1123 0669d102ce feat: major engine overhaul - scene demo with lighting, sphere, ground 
- Scene Demo: cube + sphere + ground plane with proper lighting
- Audio: XAudio2 dynamic loading + WAV playback
- Physics: expanded collision system
- Renderer: improved pipeline with materials
- UI: extended widget system
- VisualScript: enhanced serializer + block interactions
- ASM: optimized math/memory/profiling routines
- Window: mouse input + scroll support
2026-07-12 08:21:07 +08:00

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#include "ui.h"
#include <stdlib.h>
#include <string.h>
#include <d3dcompiler.h>
#include <windows.h>
// 为 MinGW 提供 COM 助手宏（MSVC 已内联提供）
#ifndef _MSC_VER
#define ID3D11Device_CreateBuffer(p,a,b,c) (p)->lpVtbl->CreateBuffer(p,a,b,c)
#define ID3D11Device_CreateVertexShader(p,a,b,c,d) (p)->lpVtbl->CreateVertexShader(p,a,b,c,d)
#define ID3D11Device_CreatePixelShader(p,a,b,c,d) (p)->lpVtbl->CreatePixelShader(p,a,b,c,d)
#define ID3D11Device_CreateInputLayout(p,a,b,c,d,e) (p)->lpVtbl->CreateInputLayout(p,a,b,c,d,e)
#define ID3D11Device_CreateBlendState(p,a,b) (p)->lpVtbl->CreateBlendState(p,a,b)
#define ID3D11Device_CreateRasterizerState(p,a,b) (p)->lpVtbl->CreateRasterizerState(p,a,b)
#define ID3D11Device_CreateTexture2D(p,a,b,c) (p)->lpVtbl->CreateTexture2D(p,a,b,c)
#define ID3D11Device_CreateShaderResourceView(p,a,b,c) (p)->lpVtbl->CreateShaderResourceView(p,a,b,c)
#define ID3D11Device_CreateSamplerState(p,a,b) (p)->lpVtbl->CreateSamplerState(p,a,b)
#define ID3D11RasterizerState_Release(p) (p)->lpVtbl->Release(p)
#define ID3D11BlendState_Release(p) (p)->lpVtbl->Release(p)
#define ID3D11InputLayout_Release(p) (p)->lpVtbl->Release(p)
#define ID3D11PixelShader_Release(p) (p)->lpVtbl->Release(p)
#define ID3D11VertexShader_Release(p) (p)->lpVtbl->Release(p)
#define ID3D11Buffer_Release(p) (p)->lpVtbl->Release(p)
#define ID3D11Texture2D_Release(p) (p)->lpVtbl->Release(p)
#define ID3D11ShaderResourceView_Release(p) (p)->lpVtbl->Release(p)
#define ID3D11SamplerState_Release(p) (p)->lpVtbl->Release(p)
#define ID3D10Blob_Release(p) (p)->lpVtbl->Release(p)
#define ID3D10Blob_GetBufferPointer(p) (p)->lpVtbl->GetBufferPointer(p)
#define ID3D10Blob_GetBufferSize(p) (p)->lpVtbl->GetBufferSize(p)
#define ID3D11DeviceContext_Map(p,a,b,c,d,e) (p)->lpVtbl->Map(p,a,b,c,d,e)
#define ID3D11DeviceContext_Unmap(p,a,b) (p)->lpVtbl->Unmap(p,a,b)
#define ID3D11DeviceContext_IASetVertexBuffers(p,a,b,c,d,e) (p)->lpVtbl->IASetVertexBuffers(p,a,b,c,d,e)
#define ID3D11DeviceContext_IASetIndexBuffer(p,a,b,c) (p)->lpVtbl->IASetIndexBuffer(p,a,b,c)
#define ID3D11DeviceContext_IASetPrimitiveTopology(p,a) (p)->lpVtbl->IASetPrimitiveTopology(p,a)
#define ID3D11DeviceContext_IASetInputLayout(p,a) (p)->lpVtbl->IASetInputLayout(p,a)
#define ID3D11DeviceContext_VSSetShader(p,a,b,c) (p)->lpVtbl->VSSetShader(p,a,b,c)
#define ID3D11DeviceContext_PSSetShader(p,a,b,c) (p)->lpVtbl->PSSetShader(p,a,b,c)
#define ID3D11DeviceContext_PSSetShaderResources(p,a,b,c) (p)->lpVtbl->PSSetShaderResources(p,a,b,c)
#define ID3D11DeviceContext_PSSetSamplers(p,a,b,c) (p)->lpVtbl->PSSetSamplers(p,a,b,c)
#define ID3D11DeviceContext_OMSetBlendState(p,a,b,c) (p)->lpVtbl->OMSetBlendState(p,a,b,c)
#define ID3D11DeviceContext_RSSetState(p,a) (p)->lpVtbl->RSSetState(p,a)
#define ID3D11DeviceContext_DrawIndexed(p,a,b,c) (p)->lpVtbl->DrawIndexed(p,a,b,c)
#endif
static const char* ui_vs = R"(
struct VS_INPUT { float2 Pos : POSITION; float2 UV : TEXCOORD0; uint Color : COLOR0; };
struct VS_OUTPUT { float4 Pos : SV_POSITION; float2 UV : TEXCOORD0; float4 Color : COLOR0; };
VS_OUTPUT main(VS_INPUT input) {
VS_OUTPUT output;
output.Pos = float4(input.Pos.x, input.Pos.y, 0, 1);
output.UV = input.UV;
output.Color = float4((input.Color & 0xFF) / 255.0, ((input.Color >> 8) & 0xFF) / 255.0,
((input.Color >> 16) & 0xFF) / 255.0, ((input.Color >> 24) & 0xFF) / 255.0);
return output;
}
)";
static const char* ui_ps = R"(
struct PS_INPUT { float4 Pos : SV_POSITION; float2 UV : TEXCOORD0; float4 Color : COLOR0; };
Texture2D tex : register(t0);
SamplerState samp : register(s0);
float4 main(PS_INPUT input) : SV_TARGET { return input.Color * tex.Sample(samp, input.UV); }
)";
#define UI_FONT_COLS 16
#define UI_FONT_ROWS 8
#define UI_FONT_CELL_W 16
#define UI_FONT_CELL_H 16
#define UI_FONT_ATLAS_W (UI_FONT_COLS * UI_FONT_CELL_W)
#define UI_FONT_ATLAS_H (UI_FONT_ROWS * UI_FONT_CELL_H)
static int ui_create_font_texture(UI* ui, ID3D11Device* device) {
BITMAPINFO bmi = {0};
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth = UI_FONT_ATLAS_W;
bmi.bmiHeader.biHeight = -UI_FONT_ATLAS_H;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 32;
bmi.bmiHeader.biCompression = BI_RGB;
HDC hdc = GetDC(NULL);
HDC memdc = CreateCompatibleDC(hdc);
void* bits = NULL;
HBITMAP bmp = CreateDIBSection(memdc, &bmi, DIB_RGB_COLORS, &bits, NULL, 0);
if (!bmp) {
DeleteDC(memdc);
ReleaseDC(NULL, hdc);
return 0;
}
SelectObject(memdc, bmp);
PatBlt(memdc, 0, 0, UI_FONT_ATLAS_W, UI_FONT_ATLAS_H, BLACKNESS);
SetBkColor(memdc, RGB(0, 0, 0));
SetTextColor(memdc, RGB(255, 255, 255));
HFONT font = CreateFont(UI_FONT_CELL_H - 2, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE,
DEFAULT_CHARSET, OUT_OUTLINE_PRECIS, CLIP_DEFAULT_PRECIS,
CLEARTYPE_QUALITY, FIXED_PITCH | FF_MODERN, "Consolas");
if (font) SelectObject(memdc, font);
for (int i = 32; i < 128; i++) {
int col = i % UI_FONT_COLS;
int row = i / UI_FONT_COLS;
char c = (char)i;
TextOutA(memdc, col * UI_FONT_CELL_W + 1, row * UI_FONT_CELL_H + 1, &c, 1);
ui->char_uvs[i][0] = (float)(col * UI_FONT_CELL_W) / UI_FONT_ATLAS_W;
ui->char_uvs[i][1] = (float)(row * UI_FONT_CELL_H) / UI_FONT_ATLAS_H;
ui->char_uvs[i][2] = (float)((col + 1) * UI_FONT_CELL_W) / UI_FONT_ATLAS_W;
ui->char_uvs[i][3] = (float)((row + 1) * UI_FONT_CELL_H) / UI_FONT_ATLAS_H;
}
// 将亮度转为 alpha，文字存储为白色
uint32_t* pixels = (uint32_t*)bits;
for (int i = 0; i < UI_FONT_ATLAS_W * UI_FONT_ATLAS_H; i++) {
uint32_t p = pixels[i];
uint8_t b = (uint8_t)(p & 0xFF);
uint8_t g = (uint8_t)((p >> 8) & 0xFF);
uint8_t r = (uint8_t)((p >> 16) & 0xFF);
uint8_t lum = (uint8_t)((r * 77 + g * 150 + b * 29) >> 8);
pixels[i] = 0x00FFFFFF | ((uint32_t)lum << 24);
}
// 左上角像素保留为纯白，供纯色矩形采样
pixels[0] = 0xFFFFFFFF;
D3D11_TEXTURE2D_DESC desc = {0};
desc.Width = UI_FONT_ATLAS_W;
desc.Height = UI_FONT_ATLAS_H;
desc.MipLevels = 1;
desc.ArraySize = 1;
desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
desc.SampleDesc.Count = 1;
desc.Usage = D3D11_USAGE_IMMUTABLE;
desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
D3D11_SUBRESOURCE_DATA init = {0};
init.pSysMem = bits;
init.SysMemPitch = UI_FONT_ATLAS_W * 4;
ID3D11Texture2D* tex = NULL;
HRESULT hr = ID3D11Device_CreateTexture2D(device, &desc, &init, &tex);
if (SUCCEEDED(hr) && tex) {
ID3D11Device_CreateShaderResourceView(device, (ID3D11Resource*)tex, NULL, &ui->font_srv);
ID3D11Texture2D_Release(tex);
}
D3D11_SAMPLER_DESC sd = {0};
sd.Filter = D3D11_FILTER_MIN_MAG_MIP_POINT;
sd.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
sd.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
sd.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
ID3D11Device_CreateSamplerState(device, &sd, &ui->font_sampler);
if (font) DeleteObject(font);
DeleteObject(bmp);
DeleteDC(memdc);
ReleaseDC(NULL, hdc);
return ui->font_srv != NULL && ui->font_sampler != NULL;
}
UI* ui_create(ID3D11Device* device) {
UI* ui = (UI*)calloc(1, sizeof(UI));
ui->font_size = 14.0f;
ui->text_color = 0xFFFFFFFF;
ui->bg_color = 0xFF333333;
ui->border_color = 0xFF666666;
ui->padding = 4.0f;
D3D11_BUFFER_DESC vbd = {0};
vbd.ByteWidth = sizeof(UIVertex) * UI_MAX_VERTICES;
vbd.Usage = D3D11_USAGE_DYNAMIC;
vbd.BindFlags = D3D11_BIND_VERTEX_BUFFER;
vbd.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
ID3D11Device_CreateBuffer(device, &vbd, NULL, &ui->vertex_buffer);
D3D11_BUFFER_DESC ibd = {0};
ibd.ByteWidth = sizeof(uint32_t) * UI_MAX_INDICES;
ibd.Usage = D3D11_USAGE_DYNAMIC;
ibd.BindFlags = D3D11_BIND_INDEX_BUFFER;
ibd.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
ID3D11Device_CreateBuffer(device, &ibd, NULL, &ui->index_buffer);
// 编译着色器
ID3DBlob* vs_blob = NULL, *ps_blob = NULL, *err = NULL;
D3DCompile(ui_vs, strlen(ui_vs), NULL, NULL, NULL, "main", "vs_5_0", 0, 0, &vs_blob, &err);
D3DCompile(ui_ps, strlen(ui_ps), NULL, NULL, NULL, "main", "ps_5_0", 0, 0, &ps_blob, &err);
if (vs_blob && ps_blob) {
ID3D11Device_CreateVertexShader(device, ID3D10Blob_GetBufferPointer(vs_blob),
ID3D10Blob_GetBufferSize(vs_blob), NULL, &ui->vertex_shader);
ID3D11Device_CreatePixelShader(device, ID3D10Blob_GetBufferPointer(ps_blob),
ID3D10Blob_GetBufferSize(ps_blob), NULL, &ui->pixel_shader);
D3D11_INPUT_ELEMENT_DESC layout[] = {
{"POSITION", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0},
{"TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 8, D3D11_INPUT_PER_VERTEX_DATA, 0},
{"COLOR", 0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, 16, D3D11_INPUT_PER_VERTEX_DATA, 0},
};
ID3D11Device_CreateInputLayout(device, layout, 3,
ID3D10Blob_GetBufferPointer(vs_blob), ID3D10Blob_GetBufferSize(vs_blob), &ui->input_layout);
ID3D10Blob_Release(vs_blob);
ID3D10Blob_Release(ps_blob);
}
D3D11_BLEND_DESC bd = {0};
bd.RenderTarget[0].BlendEnable = TRUE;
bd.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA;
bd.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
bd.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
bd.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ONE;
bd.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
bd.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
ID3D11Device_CreateBlendState(device, &bd, &ui->blend_state);
D3D11_RASTERIZER_DESC rd = {0};
rd.FillMode = D3D11_FILL_SOLID;
rd.CullMode = D3D11_CULL_NONE;
rd.ScissorEnable = TRUE;
ID3D11Device_CreateRasterizerState(device, &rd, &ui->rasterizer);
ui_create_font_texture(ui, device);
return ui;
}
void ui_destroy(UI* ui) {
if (!ui) return;
if (ui->font_sampler) ID3D11SamplerState_Release(ui->font_sampler);
if (ui->font_srv) ID3D11ShaderResourceView_Release(ui->font_srv);
if (ui->rasterizer) ID3D11RasterizerState_Release(ui->rasterizer);
if (ui->blend_state) ID3D11BlendState_Release(ui->blend_state);
if (ui->input_layout) ID3D11InputLayout_Release(ui->input_layout);
if (ui->pixel_shader) ID3D11PixelShader_Release(ui->pixel_shader);
if (ui->vertex_shader) ID3D11VertexShader_Release(ui->vertex_shader);
if (ui->index_buffer) ID3D11Buffer_Release(ui->index_buffer);
if (ui->vertex_buffer) ID3D11Buffer_Release(ui->vertex_buffer);
free(ui);
}
void ui_begin(UI* ui, float mx, float my, int md, int mp, int mr) {
ui->mouse_x = mx;
ui->mouse_y = my;
ui->mouse_down = md;
ui->mouse_pressed = mp;
ui->mouse_released = mr;
ui->vertex_count = 0;
ui->index_count = 0;
}
void ui_end(UI* ui) {
(void)ui;
}
void ui_draw_rect(UI* ui, float x, float y, float w, float h, uint32_t color) {
uint32_t base = ui->vertex_count;
// UV 指向字体图集左上角纯白像素，使纯色矩形不受纹理内容影响
ui->vertices[ui->vertex_count++] = (UIVertex){x, y, 0.0f, 0.0f, color};
ui->vertices[ui->vertex_count++] = (UIVertex){x + w, y, 0.0f, 0.0f, color};
ui->vertices[ui->vertex_count++] = (UIVertex){x + w, y + h, 0.0f, 0.0f, color};
ui->vertices[ui->vertex_count++] = (UIVertex){x, y + h, 0.0f, 0.0f, color};
ui->indices[ui->index_count++] = base;
ui->indices[ui->index_count++] = base + 1;
ui->indices[ui->index_count++] = base + 2;
ui->indices[ui->index_count++] = base;
ui->indices[ui->index_count++] = base + 2;
ui->indices[ui->index_count++] = base + 3;
}
void ui_draw_text(UI* ui, float x, float y, const char* text, uint32_t color) {
if (!text) return;
float px = x;
float py = y;
const float cw = (float)UI_FONT_CELL_W;
const float ch = (float)UI_FONT_CELL_H;
while (*text) {
unsigned char c = (unsigned char)*text++;
if (c < 32 || c >= 128) c = '?';
float u1 = ui->char_uvs[c][0];
float v1 = ui->char_uvs[c][1];
float u2 = ui->char_uvs[c][2];
float v2 = ui->char_uvs[c][3];
uint32_t base = ui->vertex_count;
ui->vertices[ui->vertex_count++] = (UIVertex){px, py, u1, v1, color};
ui->vertices[ui->vertex_count++] = (UIVertex){px + cw, py, u2, v1, color};
ui->vertices[ui->vertex_count++] = (UIVertex){px + cw, py + ch, u2, v2, color};
ui->vertices[ui->vertex_count++] = (UIVertex){px, py + ch, u1, v2, color};
ui->indices[ui->index_count++] = base;
ui->indices[ui->index_count++] = base + 1;
ui->indices[ui->index_count++] = base + 2;
ui->indices[ui->index_count++] = base;
ui->indices[ui->index_count++] = base + 2;
ui->indices[ui->index_count++] = base + 3;
px += cw;
}
}
void ui_draw_rect_border(UI* ui, float x, float y, float w, float h,
uint32_t fill, uint32_t border, float thickness) {
ui_draw_rect(ui, x, y, w, h, fill);
ui_draw_rect(ui, x, y, w, thickness, border);
ui_draw_rect(ui, x, y + h - thickness, w, thickness, border);
ui_draw_rect(ui, x, y, thickness, h, border);
ui_draw_rect(ui, x + w - thickness, y, thickness, h, border);
}
int ui_button(UI* ui, float x, float y, float w, float h, const char* text) {
int hover = ui->mouse_x >= x && ui->mouse_x <= x + w &&
ui->mouse_y >= y && ui->mouse_y <= y + h;
uint32_t color = hover ? 0xFF555555 : 0xFF444444;
if (hover && ui->mouse_pressed) color = 0xFF666666;
ui_draw_rect_border(ui, x, y, w, h, color, 0xFF888888, 1);
if (text) {
float tx = x + ui->padding;
float ty = y + (h - UI_FONT_CELL_H) * 0.5f;
ui_draw_text(ui, tx, ty, text, ui->text_color);
}
return hover && ui->mouse_pressed;
}
float ui_slider(UI* ui, float x, float y, float w, float h, float value, float min_val, float max_val) {
ui_draw_rect_border(ui, x, y, w, h, 0xFF333333, 0xFF666666, 1);
int hover = ui->mouse_x >= x && ui->mouse_x <= x + w &&
ui->mouse_y >= y && ui->mouse_y <= y + h;
if (hover && ui->mouse_down) {
float t = (ui->mouse_x - x) / w;
value = min_val + t * (max_val - min_val);
if (value < min_val) value = min_val;
if (value > max_val) value = max_val;
}
float knob_x = x + ((value - min_val) / (max_val - min_val)) * (w - h);
ui_draw_rect(ui, knob_x, y, h, h, 0xFF0078D4);
return value;
}
int ui_checkbox(UI* ui, float x, float y, const char* text, int checked) {
float s = 16.0f;
ui_draw_rect_border(ui, x, y, s, s, checked ? 0xFF0078D4 : 0xFF333333, 0xFF666666, 1);
if (checked) {
// 绘制对勾
ui_draw_rect(ui, x + 4, y + 7, 2, 2, 0xFFFFFFFF);
ui_draw_rect(ui, x + 6, y + 9, 2, 2, 0xFFFFFFFF);
ui_draw_rect(ui, x + 8, y + 5, 5, 2, 0xFFFFFFFF);
}
if (text) {
ui_draw_text(ui, x + s + ui->padding, y + (s - UI_FONT_CELL_H) * 0.5f, text, ui->text_color);
}
if (ui->mouse_x >= x && ui->mouse_x <= x + s &&
ui->mouse_y >= y && ui->mouse_y <= y + s && ui->mouse_pressed) {
return !checked;
}
return checked;
}
void ui_label(UI* ui, float x, float y, const char* text) {
if (text) {
ui_draw_text(ui, x, y, text, ui->text_color);
}
}
void ui_render(UI* ui, ID3D11DeviceContext* ctx) {
if (ui->vertex_count == 0) return;
D3D11_MAPPED_SUBRESOURCE mapped;
if (SUCCEEDED(ID3D11DeviceContext_Map(ctx, (ID3D11Resource*)ui->vertex_buffer, 0,
D3D11_MAP_WRITE_DISCARD, 0, &mapped))) {
memcpy(mapped.pData, ui->vertices, sizeof(UIVertex) * ui->vertex_count);
ID3D11DeviceContext_Unmap(ctx, (ID3D11Resource*)ui->vertex_buffer, 0);
}
if (SUCCEEDED(ID3D11DeviceContext_Map(ctx, (ID3D11Resource*)ui->index_buffer, 0,
D3D11_MAP_WRITE_DISCARD, 0, &mapped))) {
memcpy(mapped.pData, ui->indices, sizeof(uint32_t) * ui->index_count);
ID3D11DeviceContext_Unmap(ctx, (ID3D11Resource*)ui->index_buffer, 0);
}
UINT stride = sizeof(UIVertex);
UINT offset = 0;
ID3D11DeviceContext_IASetVertexBuffers(ctx, 0, 1, &ui->vertex_buffer, &stride, &offset);
ID3D11DeviceContext_IASetIndexBuffer(ctx, ui->index_buffer, DXGI_FORMAT_R32_UINT, 0);
ID3D11DeviceContext_IASetPrimitiveTopology(ctx, D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
ID3D11DeviceContext_IASetInputLayout(ctx, ui->input_layout);
ID3D11DeviceContext_VSSetShader(ctx, ui->vertex_shader, NULL, 0);
ID3D11DeviceContext_PSSetShader(ctx, ui->pixel_shader, NULL, 0);
ID3D11DeviceContext_PSSetShaderResources(ctx, 0, 1, &ui->font_srv);
ID3D11DeviceContext_PSSetSamplers(ctx, 0, 1, &ui->font_sampler);
float blend[4] = {1, 1, 1, 1};
ID3D11DeviceContext_OMSetBlendState(ctx, ui->blend_state, blend, 0xFFFFFFFF);
ID3D11DeviceContext_RSSetState(ctx, ui->rasterizer);
ID3D11DeviceContext_DrawIndexed(ctx, ui->index_count, 0, 0);
ID3D11DeviceContext_OMSetBlendState(ctx, NULL, blend, 0xFFFFFFFF);
ID3D11DeviceContext_RSSetState(ctx, NULL);
}
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