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Texture-based round corners: Use separate textures for square corners and fix a bunch of corner-case issues

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This commit is contained in:
Ben Carter
2020-06-08 15:24:15 +09:00
committed by ocornut
parent 5820a7e248
commit 75f5aaaa1c
5 changed files with 404 additions and 369 deletions
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30
imgui_demo.cpp
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@ -265,8 +265,16 @@ static void TestTextureBasedRender()
ImGui::Begin("tex_round_corners");
style.RoundCornersUseTex = io.KeyShift;
ImGui::Checkbox("style.RoundCornersUseTex (hold SHIFT to toggle)", &style.RoundCornersUseTex);
bool old_round_corners_use_tex = style.RoundCornersUseTex;
style.RoundCornersUseTex ^= io.KeyShift;
if (ImGui::Checkbox("style.RoundCornersUseTex (hold SHIFT to toggle)", &style.RoundCornersUseTex))
old_round_corners_use_tex = !old_round_corners_use_tex;
if (style.RoundCornersUseTex)
ImGui::GetWindowDrawList()->Flags |= ImDrawListFlags_RoundCornersUseTex;
else
ImGui::GetWindowDrawList()->Flags &= ~ImDrawListFlags_RoundCornersUseTex;
static float radius = 16.0f; // ImFontAtlasRoundCornersMaxSize * 0.5f;
static int segments = 20;
@ -274,6 +282,11 @@ static void TestTextureBasedRender()
ImGui::SliderFloat("radius", &radius, 0.0f, 64.0f /*(float)ImFontAtlasRoundCornersMaxSize*/, "%.0f");
static int width = 180;
static int height = 180;
ImGui::SliderInt("width", &width, 1, 200);
ImGui::SliderInt("height", &height, 1, 200);
static float stroke_width = 1.0f;
ImGui::SliderFloat("stroke_width", &stroke_width, 1.0f, 10.0f, "%.0f");
@ -326,8 +339,9 @@ static void TestTextureBasedRender()
{
ImGui::Button("##3", ImVec2(200, 200));
ImVec2 r_min = ImGui::GetItemRectMin();
ImVec2 r_max = ImGui::GetItemRectMax();
ImVec2 size = ImGui::GetItemRectSize();
ImVec2 r_min = ImVec2(ImGui::GetItemRectMin().x + ((size.x - width) * 0.5f), ImGui::GetItemRectMin().y + ((size.y - height) * 0.5f));
ImVec2 r_max = ImVec2(r_min.x + width, r_min.y + height);
GetVtxIdxDelta(draw_list, &vtx_n, &idx_n);
draw_list->AddRectFilled(r_min, r_max, IM_COL32(255,0,255,255), radius, corner_flags ? corner_flags : ImDrawFlags_RoundCornersNone);
@ -336,8 +350,10 @@ static void TestTextureBasedRender()
}
{
ImGui::Button("##4", ImVec2(200, 200));
ImVec2 r_min = ImGui::GetItemRectMin();
ImVec2 r_max = ImGui::GetItemRectMax();
ImVec2 size = ImGui::GetItemRectSize();
ImVec2 r_min = ImVec2(ImGui::GetItemRectMin().x + ((size.x - width) * 0.5f), ImGui::GetItemRectMin().y + ((size.y - height) * 0.5f));
ImVec2 r_max = ImVec2(r_min.x + width, r_min.y + height);
GetVtxIdxDelta(draw_list, &vtx_n, &idx_n);
draw_list->AddRect(r_min, r_max, IM_COL32(255,0,255,255), radius, corner_flags, stroke_width);
@ -390,6 +406,8 @@ static void TestTextureBasedRender()
ImFontAtlas* atlas = ImGui::GetIO().Fonts;
ImGui::Image(atlas->TexID, ImVec2((float)atlas->TexWidth, (float)atlas->TexHeight), ImVec2(0, 0), ImVec2(1, 1), ImColor(255, 255, 255, 255), ImColor(255, 255, 255, 128));
style.RoundCornersUseTex = old_round_corners_use_tex;
ImGui::End();
}