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Expand all graphics retrieval with bitmap and vram

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This commit is contained in:
Justin Scofield
2022-07-17 18:09:12 -04:00
parent 5a62497110
commit 67e1e7ea0c
12 changed files with 165 additions and 115 deletions
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102
src/gui/canvas.cc
View File

@@ -10,8 +10,10 @@ namespace gui {
void Canvas::Update() {
ImVec2 canvas_p0 = ImGui::GetCursorScreenPos();
ImVec2 canvas_sz = ImGui::GetContentRegionAvail();
auto canvas_p1 = ImVec2(canvas_p0.x + canvas_sz.x, canvas_p0.y + canvas_sz.y);
if (!custom_canvas_size_) canvas_sz_ = ImGui::GetContentRegionAvail();
auto canvas_p1 =
ImVec2(canvas_p0.x + canvas_sz_.x, canvas_p0.y + canvas_sz_.y);
// Draw border and background color
const ImGuiIO &io = ImGui::GetIO();
@@ -21,7 +23,7 @@ void Canvas::Update() {
// This will catch our interactions
ImGui::InvisibleButton(
"canvas", canvas_sz,
"canvas", canvas_sz_,
ImGuiButtonFlags_MouseButtonLeft | ImGuiButtonFlags_MouseButtonRight);
const bool is_hovered = ImGui::IsItemHovered(); // Hovered
const bool is_active = ImGui::IsItemActive(); // Held
@@ -67,12 +69,12 @@ void Canvas::Update() {
draw_list->PushClipRect(canvas_p0, canvas_p1, true);
if (enable_grid_) {
const float GRID_STEP = 64.0f;
for (float x = fmodf(scrolling_.x, GRID_STEP); x < canvas_sz.x;
for (float x = fmodf(scrolling_.x, GRID_STEP); x < canvas_sz_.x;
x += GRID_STEP)
draw_list->AddLine(ImVec2(canvas_p0.x + x, canvas_p0.y),
ImVec2(canvas_p0.x + x, canvas_p1.y),
IM_COL32(200, 200, 200, 40));
for (float y = fmodf(scrolling_.y, GRID_STEP); y < canvas_sz.y;
for (float y = fmodf(scrolling_.y, GRID_STEP); y < canvas_sz_.y;
y += GRID_STEP)
draw_list->AddLine(ImVec2(canvas_p0.x, canvas_p0.y + y),
ImVec2(canvas_p1.x, canvas_p0.y + y),
@@ -89,5 +91,95 @@ void Canvas::Update() {
draw_list->PopClipRect();
}
void Canvas::DrawBackground() {
canvas_p0_ = ImGui::GetCursorScreenPos();
if (!custom_canvas_size_) canvas_sz_ = ImGui::GetContentRegionAvail();
canvas_p1_ = ImVec2(canvas_p0_.x + canvas_sz_.x, canvas_p0_.y + canvas_sz_.y);
// Draw border and background color
draw_list_ = ImGui::GetWindowDrawList();
draw_list_->AddRectFilled(canvas_p0_, canvas_p1_, IM_COL32(32, 32, 32, 255));
draw_list_->AddRect(canvas_p0_, canvas_p1_, IM_COL32(255, 255, 255, 255));
}
void Canvas::UpdateContext() {
// This will catch our interactions
const ImGuiIO &io = ImGui::GetIO();
ImGui::InvisibleButton(
"canvas", canvas_sz_,
ImGuiButtonFlags_MouseButtonLeft | ImGuiButtonFlags_MouseButtonRight);
const bool is_hovered = ImGui::IsItemHovered(); // Hovered
const bool is_active = ImGui::IsItemActive(); // Held
const ImVec2 origin(canvas_p0_.x + scrolling_.x,
canvas_p0_.y + scrolling_.y); // Lock scrolled origin
const ImVec2 mouse_pos_in_canvas(io.MousePos.x - origin.x,
io.MousePos.y - origin.y);
// Add first and second point
if (is_hovered && !dragging_select_ &&
ImGui::IsMouseClicked(ImGuiMouseButton_Left)) {
points_.push_back(mouse_pos_in_canvas);
points_.push_back(mouse_pos_in_canvas);
dragging_select_ = true;
}
if (dragging_select_) {
points_.back() = mouse_pos_in_canvas;
if (!ImGui::IsMouseDown(ImGuiMouseButton_Left)) dragging_select_ = false;
}
// Pan (we use a zero mouse threshold when there's no context menu)
const float mouse_threshold_for_pan = enable_context_menu_ ? -1.0f : 0.0f;
if (is_active &&
ImGui::IsMouseDragging(ImGuiMouseButton_Right, mouse_threshold_for_pan)) {
scrolling_.x += io.MouseDelta.x;
scrolling_.y += io.MouseDelta.y;
}
// Context menu (under default mouse threshold)
ImVec2 drag_delta = ImGui::GetMouseDragDelta(ImGuiMouseButton_Right);
if (enable_context_menu_ && drag_delta.x == 0.0f && drag_delta.y == 0.0f)
ImGui::OpenPopupOnItemClick("context", ImGuiPopupFlags_MouseButtonRight);
if (ImGui::BeginPopup("context")) {
if (dragging_select_) points_.resize(points_.size() - 2);
dragging_select_ = false;
if (ImGui::MenuItem("Remove all", nullptr, false, points_.Size > 0)) {
points_.clear();
}
ImGui::EndPopup();
}
}
void Canvas::DrawGrid() {
// Draw grid + all lines in the canvas
draw_list_->PushClipRect(canvas_p0_, canvas_p1_, true);
if (enable_grid_) {
const float GRID_STEP = 64.0f;
for (float x = fmodf(scrolling_.x, GRID_STEP); x < canvas_sz_.x;
x += GRID_STEP)
draw_list_->AddLine(ImVec2(canvas_p0_.x + x, canvas_p0_.y),
ImVec2(canvas_p0_.x + x, canvas_p1_.y),
IM_COL32(200, 200, 200, 40));
for (float y = fmodf(scrolling_.y, GRID_STEP); y < canvas_sz_.y;
y += GRID_STEP)
draw_list_->AddLine(ImVec2(canvas_p0_.x, canvas_p0_.y + y),
ImVec2(canvas_p1_.x, canvas_p0_.y + y),
IM_COL32(200, 200, 200, 40));
}
}
void Canvas::DrawOverlay() {
const ImVec2 origin(canvas_p0_.x + scrolling_.x,
canvas_p0_.y + scrolling_.y); // Lock scrolled origin
for (int n = 0; n < points_.Size; n += 2) {
draw_list_->AddRect(
ImVec2(origin.x + points_[n].x, origin.y + points_[n].y),
ImVec2(origin.x + points_[n + 1].x, origin.y + points_[n + 1].y),
IM_COL32(255, 255, 255, 255), 1.0f);
}
draw_list_->PopClipRect();
}
} // namespace gui
} // namespace yaze

13
src/gui/canvas.h
View File

@@ -4,6 +4,7 @@
#include <imgui/imgui.h>
#include <cmath>
#include <memory>
#include <string>
namespace yaze {
@@ -11,18 +12,30 @@ namespace gui {
class Canvas {
public:
Canvas() = default;
Canvas(ImVec2 canvas_size)
: canvas_sz_(canvas_size), custom_canvas_size_(true) {}
void Update();
void DrawBackground();
void UpdateContext();
void DrawGrid();
void DrawOverlay(); // last
private:
bool enable_grid_ = true;
bool enable_context_menu_ = true;
bool dragging_select_ = false;
bool custom_canvas_size_ = false;
std::string title_;
ImDrawList* draw_list_;
ImVector<ImVec2> points_;
ImVec2 scrolling_;
ImVec2 canvas_sz_;
ImVec2 canvas_p0_;
ImVec2 canvas_p1_;
};
} // namespace gui
} // namespace yaze