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Simple UI for frame seeking.

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This commit is contained in:
Ben Vanik
2015-02-21 11:19:00 -08:00
parent 5227fe72b5
commit 07c592942f
14 changed files with 795 additions and 202 deletions
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596
src/xenia/gpu/trace_viewer_main.cc
View File

@@ -8,8 +8,11 @@
*/
#include <gflags/gflags.h>
#include "poly/main.h"
#include "poly/mapped_memory.h"
#include "third_party/imgui/imgui.h"
#include "xenia/gpu/gl4/gl_context.h"
#include "xenia/gpu/graphics_system.h"
#include "xenia/gpu/tracing.h"
#include "xenia/emulator.h"
@@ -20,6 +23,271 @@ DEFINE_string(target_trace_file, "", "Specifies the trace file to load.");
namespace xe {
namespace gpu {
// TODO(benvanik): move to tracing.h/cc
class TraceReader {
public:
struct Frame {
const uint8_t* start_ptr;
const uint8_t* end_ptr;
int command_count;
};
TraceReader() : trace_data_(nullptr), trace_size_(0) {}
~TraceReader() = default;
const Frame* frame(int n) const { return &frames_[n]; }
int frame_count() const { return int(frames_.size()); }
bool Open(const std::wstring& path) {
Close();
mmap_ = poly::MappedMemory::Open(path, poly::MappedMemory::Mode::kRead);
if (!mmap_) {
return false;
}
trace_data_ = reinterpret_cast<const uint8_t*>(mmap_->data());
trace_size_ = mmap_->size();
ParseTrace();
return true;
}
void Close() {
mmap_.reset();
trace_data_ = nullptr;
trace_size_ = 0;
}
// void Foo() {
// auto trace_ptr = trace_data;
// while (trace_ptr < trace_data + trace_size) {
// auto cmd_type = *reinterpret_cast<const TraceCommandType*>(trace_ptr);
// switch (cmd_type) {
// case TraceCommandType::kPrimaryBufferStart:
// break;
// case TraceCommandType::kPrimaryBufferEnd:
// break;
// case TraceCommandType::kIndirectBufferStart:
// break;
// case TraceCommandType::kIndirectBufferEnd:
// break;
// case TraceCommandType::kPacketStart:
// break;
// case TraceCommandType::kPacketEnd:
// break;
// case TraceCommandType::kMemoryRead:
// break;
// case TraceCommandType::kMemoryWrite:
// break;
// case TraceCommandType::kEvent:
// break;
// }
// /*trace_ptr = graphics_system->PlayTrace(
// trace_ptr, trace_size - (trace_ptr - trace_data),
// GraphicsSystem::TracePlaybackMode::kBreakOnSwap);*/
// }
//}
protected:
void ParseTrace() {
auto trace_ptr = trace_data_;
Frame current_frame = {
trace_ptr, nullptr, 0,
};
bool pending_break = false;
while (trace_ptr < trace_data_ + trace_size_) {
++current_frame.command_count;
auto type =
static_cast<TraceCommandType>(poly::load<uint32_t>(trace_ptr));
switch (type) {
case TraceCommandType::kPrimaryBufferStart: {
auto cmd =
reinterpret_cast<const PrimaryBufferStartCommand*>(trace_ptr);
trace_ptr += sizeof(*cmd) + cmd->count * 4;
break;
}
case TraceCommandType::kPrimaryBufferEnd: {
auto cmd =
reinterpret_cast<const PrimaryBufferEndCommand*>(trace_ptr);
trace_ptr += sizeof(*cmd);
break;
}
case TraceCommandType::kIndirectBufferStart: {
auto cmd =
reinterpret_cast<const IndirectBufferStartCommand*>(trace_ptr);
trace_ptr += sizeof(*cmd) + cmd->count * 4;
break;
}
case TraceCommandType::kIndirectBufferEnd: {
auto cmd =
reinterpret_cast<const IndirectBufferEndCommand*>(trace_ptr);
trace_ptr += sizeof(*cmd);
break;
}
case TraceCommandType::kPacketStart: {
auto cmd = reinterpret_cast<const PacketStartCommand*>(trace_ptr);
trace_ptr += sizeof(*cmd) + cmd->count * 4;
break;
}
case TraceCommandType::kPacketEnd: {
auto cmd = reinterpret_cast<const PacketEndCommand*>(trace_ptr);
trace_ptr += sizeof(*cmd);
if (pending_break) {
current_frame.end_ptr = trace_ptr;
frames_.push_back(std::move(current_frame));
current_frame.start_ptr = trace_ptr;
current_frame.end_ptr = nullptr;
current_frame.command_count = 0;
pending_break = false;
}
break;
}
case TraceCommandType::kMemoryRead: {
auto cmd = reinterpret_cast<const MemoryReadCommand*>(trace_ptr);
trace_ptr += sizeof(*cmd) + cmd->length;
break;
}
case TraceCommandType::kMemoryWrite: {
auto cmd = reinterpret_cast<const MemoryWriteCommand*>(trace_ptr);
trace_ptr += sizeof(*cmd) + cmd->length;
break;
}
case TraceCommandType::kEvent: {
auto cmd = reinterpret_cast<const EventCommand*>(trace_ptr);
trace_ptr += sizeof(*cmd);
switch (cmd->event_type) {
case EventType::kSwap: {
pending_break = true;
break;
}
}
break;
}
}
}
if (pending_break) {
current_frame.end_ptr = trace_ptr;
frames_.push_back(std::move(current_frame));
}
}
std::unique_ptr<poly::MappedMemory> mmap_;
const uint8_t* trace_data_;
size_t trace_size_;
std::vector<Frame> frames_;
};
class TracePlayer : public TraceReader {
public:
TracePlayer(poly::ui::Loop* loop, GraphicsSystem* graphics_system)
: loop_(loop),
graphics_system_(graphics_system),
current_frame_index_(0),
current_command_index_(-1) {}
~TracePlayer() = default;
int current_frame_index() const { return current_frame_index_; }
const Frame* current_frame() const {
if (current_frame_index_ > frame_count()) {
return nullptr;
}
return frame(current_frame_index_);
}
void SeekFrame(int target_frame) {
if (current_frame_index_ == target_frame) {
return;
}
current_frame_index_ = target_frame;
auto frame = current_frame();
current_command_index_ = frame->command_count - 1;
graphics_system_->PlayTrace(
frame->start_ptr, frame->end_ptr - frame->start_ptr,
GraphicsSystem::TracePlaybackMode::kBreakOnSwap);
}
int current_command_index() const { return current_command_index_; }
void SeekCommand(int target_command) {
current_command_index_ = target_command;
}
private:
poly::ui::Loop* loop_;
GraphicsSystem* graphics_system_;
int current_frame_index_;
int current_command_index_;
};
void DrawUI(xe::ui::MainWindow* window, TracePlayer& player) {
ImGui::ShowTestWindow();
ImGui::SetNextWindowPos(ImVec2(5, 5), ImGuiSetCondition_FirstUseEver);
if (ImGui::Begin("Controller", nullptr, ImVec2(0, 0), -1.0f,
ImGuiWindowFlags_AlwaysAutoResize)) {
int target_frame = player.current_frame_index();
if (ImGui::Button("|<<")) {
target_frame = 0;
}
ImGui::SameLine();
if (ImGui::Button(">>", ImVec2(0, 0), true)) {
if (target_frame + 1 < player.frame_count()) {
++target_frame;
}
}
ImGui::SameLine();
if (ImGui::Button(">>|")) {
target_frame = player.frame_count() - 1;
}
ImGui::SameLine();
ImGui::SliderInt("", &target_frame, 0, player.frame_count() - 1);
if (target_frame != player.current_frame_index()) {
player.SeekFrame(target_frame);
}
}
ImGui::End();
ImGui::SetNextWindowPos(ImVec2(float(window->width()) - 500 - 5, 5),
ImGuiSetCondition_FirstUseEver);
if (ImGui::Begin("Frame Inspector", nullptr, ImVec2(500, 300))) {
ImGui::Columns(2, "frame_inspector");
ImGui::Text("Frame #%d", player.current_frame_index());
ImGui::Separator();
ImGui::BeginChild("Sub1");
ImGui::PushID(-1);
bool is_selected = player.current_command_index() == -1;
if (ImGui::Selectable("<start>", &is_selected)) {
player.SeekCommand(-1);
}
ImGui::PopID();
int column_width = int(ImGui::GetContentRegionMax().x);
auto frame = player.current_frame();
for (int i = 0; i < frame->command_count; ++i) {
ImGui::PushID(i);
is_selected = i == player.current_command_index();
if (ImGui::Selectable("command", &is_selected)) {
player.SeekCommand(i);
}
ImGui::SameLine(column_width - 30);
ImGui::Text("bar");
ImGui::PopID();
}
ImGui::EndChild();
ImGui::NextColumn();
ImGui::Text("right side");
ImGui::Columns(1);
}
ImGui::End();
}
void ImImpl_Setup();
void ImImpl_Shutdown();
int trace_viewer_main(std::vector<std::wstring>& args) {
// Create the emulator.
auto emulator = std::make_unique<Emulator>(L"");
@@ -42,30 +310,336 @@ int trace_viewer_main(std::vector<std::wstring>& args) {
path = args[1];
}
// Normalize the path and make absolute.
std::wstring abs_path = poly::to_absolute_path(path);
auto abs_path = poly::to_absolute_path(path);
auto window = emulator->main_window();
auto loop = window->loop();
auto file_name = poly::find_name_from_path(path);
window->set_title(std::wstring(L"Xenia GPU Trace Viewer: ") + file_name);
// TODO(benvanik): UI? replay control on graphics system?
auto graphics_system = emulator->graphics_system();
auto mmap =
poly::MappedMemory::Open(abs_path, poly::MappedMemory::Mode::kRead);
auto trace_data = reinterpret_cast<const uint8_t*>(mmap->data());
auto trace_size = mmap->size();
auto trace_ptr = trace_data;
while (trace_ptr < trace_data + trace_size) {
trace_ptr = graphics_system->PlayTrace(
trace_ptr, trace_size - (trace_ptr - trace_data),
GraphicsSystem::TracePlaybackMode::kBreakOnSwap);
TracePlayer player(loop, emulator->graphics_system());
if (!player.Open(abs_path)) {
XELOGE("Could not load trace file");
return 1;
}
auto control = window->child(0);
control->on_key_down.AddListener([](poly::ui::KeyEvent& e) {});
control->on_key_up.AddListener([](poly::ui::KeyEvent& e) {});
control->on_mouse_down.AddListener([](poly::ui::MouseEvent& e) {
auto& io = ImGui::GetIO();
io.MousePos = ImVec2(float(e.x()), float(e.y()));
switch (e.button()) {
case poly::ui::MouseEvent::Button::kLeft:
io.MouseDown[0] = true;
break;
case poly::ui::MouseEvent::Button::kRight:
io.MouseDown[1] = true;
break;
}
});
control->on_mouse_move.AddListener([](poly::ui::MouseEvent& e) {
auto& io = ImGui::GetIO();
io.MousePos = ImVec2(float(e.x()), float(e.y()));
});
control->on_mouse_up.AddListener([](poly::ui::MouseEvent& e) {
auto& io = ImGui::GetIO();
io.MousePos = ImVec2(float(e.x()), float(e.y()));
switch (e.button()) {
case poly::ui::MouseEvent::Button::kLeft:
io.MouseDown[0] = false;
break;
case poly::ui::MouseEvent::Button::kRight:
io.MouseDown[1] = false;
break;
}
});
control->on_mouse_wheel.AddListener([](poly::ui::MouseEvent& e) {
auto& io = ImGui::GetIO();
io.MousePos = ImVec2(float(e.x()), float(e.y()));
io.MouseWheel += float(e.dy() / 120.0f);
});
control->on_paint.AddListener([&](poly::ui::UIEvent& e) {
static bool imgui_setup = false;
if (!imgui_setup) {
ImImpl_Setup();
imgui_setup = true;
}
auto& io = ImGui::GetIO();
auto current_ticks = poly::threading::ticks();
static uint64_t last_ticks = 0;
io.DeltaTime = (current_ticks - last_ticks) /
float(poly::threading::ticks_per_second());
last_ticks = current_ticks;
io.DisplaySize =
ImVec2(float(e.control()->width()), float(e.control()->height()));
ImGui::NewFrame();
DrawUI(window, player);
glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
ImGui::Render();
graphics_system->RequestSwap();
});
graphics_system->RequestSwap();
// Wait until we are exited.
emulator->main_window()->loop()->AwaitQuit();
ImImpl_Shutdown();
}
emulator.reset();
return 0;
}
// TODO(benvanik): move to another file.
extern "C" GLEWContext* glewGetContext();
extern "C" WGLEWContext* wglewGetContext();
static int shader_handle, vert_handle, frag_handle;
static int texture_location, proj_mtx_location;
static int position_location, uv_location, colour_location;
static size_t vbo_max_size = 20000;
static unsigned int vbo_handle, vao_handle;
void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count);
void ImImpl_Setup() {
ImGuiIO& io = ImGui::GetIO();
const GLchar* vertex_shader =
"#version 330\n"
"uniform mat4 ProjMtx;\n"
"in vec2 Position;\n"
"in vec2 UV;\n"
"in vec4 Color;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* fragment_shader =
"#version 330\n"
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture( Texture, Frag_UV.st);\n"
"}\n";
shader_handle = glCreateProgram();
vert_handle = glCreateShader(GL_VERTEX_SHADER);
frag_handle = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(vert_handle, 1, &vertex_shader, 0);
glShaderSource(frag_handle, 1, &fragment_shader, 0);
glCompileShader(vert_handle);
glCompileShader(frag_handle);
glAttachShader(shader_handle, vert_handle);
glAttachShader(shader_handle, frag_handle);
glLinkProgram(shader_handle);
texture_location = glGetUniformLocation(shader_handle, "Texture");
proj_mtx_location = glGetUniformLocation(shader_handle, "ProjMtx");
position_location = glGetAttribLocation(shader_handle, "Position");
uv_location = glGetAttribLocation(shader_handle, "UV");
colour_location = glGetAttribLocation(shader_handle, "Color");
glGenBuffers(1, &vbo_handle);
glBindBuffer(GL_ARRAY_BUFFER, vbo_handle);
glBufferData(GL_ARRAY_BUFFER, vbo_max_size, NULL, GL_DYNAMIC_DRAW);
glGenVertexArrays(1, &vao_handle);
glBindVertexArray(vao_handle);
glBindBuffer(GL_ARRAY_BUFFER, vbo_handle);
glEnableVertexAttribArray(position_location);
glEnableVertexAttribArray(uv_location);
glEnableVertexAttribArray(colour_location);
glVertexAttribPointer(position_location, 2, GL_FLOAT, GL_FALSE,
sizeof(ImDrawVert), (GLvoid*)offsetof(ImDrawVert, pos));
glVertexAttribPointer(uv_location, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert),
(GLvoid*)offsetof(ImDrawVert, uv));
glVertexAttribPointer(colour_location, 4, GL_UNSIGNED_BYTE, GL_TRUE,
sizeof(ImDrawVert), (GLvoid*)offsetof(ImDrawVert, col));
glBindVertexArray(0);
glDisableVertexAttribArray(position_location);
glDisableVertexAttribArray(uv_location);
glDisableVertexAttribArray(colour_location);
glBindBuffer(GL_ARRAY_BUFFER, 0);
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(
&pixels, &width, &height); // Load as RGBA 32-bits for OpenGL3 demo
// because it is more likely to be compatible
// with user's existing shader.
GLuint tex_id;
glCreateTextures(GL_TEXTURE_2D, 1, &tex_id);
glTextureParameteri(tex_id, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTextureParameteri(tex_id, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTextureStorage2D(tex_id, 1, GL_RGBA8, width, height);
glTextureSubImage2D(tex_id, 0, 0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE,
pixels);
// Store our identifier
io.Fonts->TexID = (void*)(intptr_t)tex_id;
io.DeltaTime = 1.0f / 60.0f;
io.RenderDrawListsFn = ImImpl_RenderDrawLists;
auto& style = ImGui::GetStyle();
style.WindowRounding = 0;
style.Colors[ImGuiCol_Text] = ImVec4(0.89f, 0.90f, 0.90f, 1.00f);
style.Colors[ImGuiCol_WindowBg] = ImVec4(0.00f, 0.00f, 0.00f, 1.00f);
style.Colors[ImGuiCol_ChildWindowBg] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_Border] = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
style.Colors[ImGuiCol_BorderShadow] = ImVec4(0.00f, 0.00f, 0.00f, 0.60f);
style.Colors[ImGuiCol_FrameBg] = ImVec4(0.80f, 0.80f, 0.80f, 0.22f);
style.Colors[ImGuiCol_TitleBg] = ImVec4(0.00f, 1.00f, 0.00f, 0.78f);
style.Colors[ImGuiCol_TitleBgCollapsed] = ImVec4(0.00f, 0.58f, 0.00f, 0.61f);
style.Colors[ImGuiCol_ScrollbarBg] = ImVec4(0.00f, 0.40f, 0.11f, 0.59f);
style.Colors[ImGuiCol_ScrollbarGrab] = ImVec4(0.00f, 0.68f, 0.00f, 0.68f);
style.Colors[ImGuiCol_ScrollbarGrabHovered] =
ImVec4(0.00f, 1.00f, 0.15f, 0.62f);
style.Colors[ImGuiCol_ScrollbarGrabActive] =
ImVec4(0.00f, 0.91f, 0.09f, 0.40f);
style.Colors[ImGuiCol_ComboBg] = ImVec4(0.20f, 0.20f, 0.20f, 0.99f);
style.Colors[ImGuiCol_CheckHovered] = ImVec4(0.23f, 0.64f, 0.13f, 0.45f);
style.Colors[ImGuiCol_CheckActive] = ImVec4(0.21f, 0.93f, 0.13f, 0.55f);
style.Colors[ImGuiCol_CheckMark] = ImVec4(0.74f, 0.90f, 0.72f, 0.50f);
style.Colors[ImGuiCol_SliderGrab] = ImVec4(1.00f, 1.00f, 1.00f, 0.30f);
style.Colors[ImGuiCol_SliderGrabActive] = ImVec4(0.34f, 0.75f, 0.11f, 1.00f);
style.Colors[ImGuiCol_Button] = ImVec4(0.15f, 0.56f, 0.11f, 0.60f);
style.Colors[ImGuiCol_ButtonHovered] = ImVec4(0.19f, 0.72f, 0.09f, 1.00f);
style.Colors[ImGuiCol_ButtonActive] = ImVec4(0.19f, 0.60f, 0.09f, 1.00f);
style.Colors[ImGuiCol_Header] = ImVec4(0.00f, 0.40f, 0.00f, 0.71f);
style.Colors[ImGuiCol_HeaderHovered] = ImVec4(0.00f, 0.60f, 0.26f, 0.80f);
style.Colors[ImGuiCol_HeaderActive] = ImVec4(0.00f, 0.75f, 0.00f, 0.80f);
style.Colors[ImGuiCol_Column] = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
style.Colors[ImGuiCol_ColumnHovered] = ImVec4(0.36f, 0.89f, 0.38f, 1.00f);
style.Colors[ImGuiCol_ColumnActive] = ImVec4(0.13f, 0.50f, 0.11f, 1.00f);
style.Colors[ImGuiCol_ResizeGrip] = ImVec4(1.00f, 1.00f, 1.00f, 0.30f);
style.Colors[ImGuiCol_ResizeGripHovered] = ImVec4(1.00f, 1.00f, 1.00f, 0.60f);
style.Colors[ImGuiCol_ResizeGripActive] = ImVec4(1.00f, 1.00f, 1.00f, 0.90f);
style.Colors[ImGuiCol_CloseButton] = ImVec4(0.00f, 0.72f, 0.00f, 0.96f);
style.Colors[ImGuiCol_CloseButtonHovered] =
ImVec4(0.38f, 1.00f, 0.42f, 0.60f);
style.Colors[ImGuiCol_CloseButtonActive] = ImVec4(0.56f, 1.00f, 0.64f, 1.00f);
style.Colors[ImGuiCol_PlotLines] = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
style.Colors[ImGuiCol_PlotLinesHovered] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
style.Colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
style.Colors[ImGuiCol_PlotHistogramHovered] =
ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TextSelectedBg] = ImVec4(0.00f, 0.00f, 1.00f, 0.35f);
style.Colors[ImGuiCol_TooltipBg] = ImVec4(0.05f, 0.05f, 0.10f, 0.90f);
}
void ImImpl_Shutdown() {
ImGuiIO& io = ImGui::GetIO();
if (vao_handle) glDeleteVertexArrays(1, &vao_handle);
if (vbo_handle) glDeleteBuffers(1, &vbo_handle);
glDetachShader(shader_handle, vert_handle);
glDetachShader(shader_handle, frag_handle);
glDeleteShader(vert_handle);
glDeleteShader(frag_handle);
glDeleteProgram(shader_handle);
auto tex_id = static_cast<GLuint>(intptr_t(io.Fonts->TexID));
glDeleteTextures(1, &tex_id);
ImGui::Shutdown();
}
void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count) {
if (cmd_lists_count == 0) return;
// Setup render state: alpha-blending enabled, no face culling, no depth
// testing, scissor enabled
glEnable(GL_BLEND);
glBlendEquation(GL_FUNC_ADD);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glEnable(GL_SCISSOR_TEST);
glActiveTexture(GL_TEXTURE0);
// Setup orthographic projection matrix
const float width = ImGui::GetIO().DisplaySize.x;
const float height = ImGui::GetIO().DisplaySize.y;
const float ortho_projection[4][4] = {
{2.0f / width, 0.0f, 0.0f, 0.0f},
{0.0f, 2.0f / -height, 0.0f, 0.0f},
{0.0f, 0.0f, -1.0f, 0.0f},
{-1.0f, 1.0f, 0.0f, 1.0f},
};
glProgramUniform1i(shader_handle, texture_location, 0);
glProgramUniformMatrix4fv(shader_handle, proj_mtx_location, 1, GL_FALSE,
&ortho_projection[0][0]);
// Grow our buffer according to what we need
size_t total_vtx_count = 0;
for (int n = 0; n < cmd_lists_count; n++)
total_vtx_count += cmd_lists[n]->vtx_buffer.size();
glBindBuffer(GL_ARRAY_BUFFER, vbo_handle);
size_t neededBufferSize = total_vtx_count * sizeof(ImDrawVert);
if (neededBufferSize > vbo_max_size) {
vbo_max_size = neededBufferSize + 5000; // Grow buffer
glBufferData(GL_ARRAY_BUFFER, vbo_max_size, NULL, GL_STREAM_DRAW);
}
// Copy and convert all vertices into a single contiguous buffer
unsigned char* buffer_data =
(unsigned char*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
if (!buffer_data) return;
for (int n = 0; n < cmd_lists_count; n++) {
const ImDrawList* cmd_list = cmd_lists[n];
memcpy(buffer_data, &cmd_list->vtx_buffer[0],
cmd_list->vtx_buffer.size() * sizeof(ImDrawVert));
buffer_data += cmd_list->vtx_buffer.size() * sizeof(ImDrawVert);
}
glUnmapBuffer(GL_ARRAY_BUFFER);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(vao_handle);
glUseProgram(shader_handle);
int cmd_offset = 0;
ImTextureID prev_texture_id = 0;
for (int n = 0; n < cmd_lists_count; n++) {
const ImDrawList* cmd_list = cmd_lists[n];
int vtx_offset = cmd_offset;
const ImDrawCmd* pcmd_end = cmd_list->commands.end();
for (const ImDrawCmd* pcmd = cmd_list->commands.begin(); pcmd != pcmd_end;
pcmd++) {
if (pcmd->texture_id != prev_texture_id) {
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->texture_id);
prev_texture_id = pcmd->texture_id;
}
glScissor((int)pcmd->clip_rect.x, (int)(height - pcmd->clip_rect.w),
(int)(pcmd->clip_rect.z - pcmd->clip_rect.x),
(int)(pcmd->clip_rect.w - pcmd->clip_rect.y));
glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
vtx_offset += pcmd->vtx_count;
}
cmd_offset = vtx_offset;
}
// Restore modified state
glBindVertexArray(0);
glUseProgram(0);
glDisable(GL_SCISSOR_TEST);
glBindTexture(GL_TEXTURE_2D, 0);
}
} // namespace gpu
} // namespace xe