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Examples: OpenGL: skip rendering and calling glViewport() if we have a zero-fixed buffer (#486)

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This commit is contained in:
ocornut
2016-02-16 09:14:38 +01:00
parent 9e86d0e225
commit 2813a44dcc
4 changed files with 10 additions and 2 deletions
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4
examples/opengl3_example/imgui_impl_glfw_gl3.cpp
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@@ -62,6 +62,8 @@ void ImGui_ImplGlfwGL3_RenderDrawLists(ImDrawData* draw_data)
ImGuiIO& io = ImGui::GetIO();
int fb_width = (int)(io.DisplaySize.x * io.DisplayFramebufferScale.x);
int fb_height = (int)(io.DisplaySize.y * io.DisplayFramebufferScale.y);
if (fb_width == 0 || fb_height == 0)
return;
draw_data->ScaleClipRects(io.DisplayFramebufferScale);
// Setup viewport, orthographic projection matrix
@@ -353,7 +355,7 @@ void ImGui_ImplGlfwGL3_NewFrame()
glfwGetWindowSize(g_Window, &w, &h);
glfwGetFramebufferSize(g_Window, &display_w, &display_h);
io.DisplaySize = ImVec2((float)w, (float)h);
io.DisplayFramebufferScale = ImVec2((float)display_w / w, (float)display_h / h);
io.DisplayFramebufferScale = ImVec2(w > 0 ? ((float)display_w / w) : 0, h > 0 ? ((float)display_h / h) : 0);
// Setup time step
double current_time = glfwGetTime();

4
examples/opengl_example/imgui_impl_glfw.cpp
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@@ -48,6 +48,8 @@ void ImGui_ImplGlfw_RenderDrawLists(ImDrawData* draw_data)
ImGuiIO& io = ImGui::GetIO();
int fb_width = (int)(io.DisplaySize.x * io.DisplayFramebufferScale.x);
int fb_height = (int)(io.DisplaySize.y * io.DisplayFramebufferScale.y);
if (fb_width == 0 || fb_height == 0)
return;
draw_data->ScaleClipRects(io.DisplayFramebufferScale);
// Setup viewport, orthographic projection matrix
@@ -242,7 +244,7 @@ void ImGui_ImplGlfw_NewFrame()
glfwGetWindowSize(g_Window, &w, &h);
glfwGetFramebufferSize(g_Window, &display_w, &display_h);
io.DisplaySize = ImVec2((float)w, (float)h);
io.DisplayFramebufferScale = ImVec2((float)display_w / w, (float)display_h / h);
io.DisplayFramebufferScale = ImVec2(w > 0 ? ((float)display_w / w) : 0, h > 0 ? ((float)display_h / h) : 0);
// Setup time step
double current_time = glfwGetTime();

2
examples/sdl_opengl3_example/imgui_impl_sdl_gl3.cpp
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@@ -57,6 +57,8 @@ void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data)
ImGuiIO& io = ImGui::GetIO();
int fb_width = (int)(io.DisplaySize.x * io.DisplayFramebufferScale.x);
int fb_height = (int)(io.DisplaySize.y * io.DisplayFramebufferScale.y);
if (fb_width == 0 || fb_height == 0)
return;
draw_data->ScaleClipRects(io.DisplayFramebufferScale);
// Setup orthographic projection matrix

2
examples/sdl_opengl_example/imgui_impl_sdl.cpp
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@@ -41,6 +41,8 @@ void ImGui_ImplSdl_RenderDrawLists(ImDrawData* draw_data)
ImGuiIO& io = ImGui::GetIO();
int fb_width = (int)(io.DisplaySize.x * io.DisplayFramebufferScale.x);
int fb_height = (int)(io.DisplaySize.y * io.DisplayFramebufferScale.y);
if (fb_width == 0 || fb_height == 0)
return;
draw_data->ScaleClipRects(io.DisplayFramebufferScale);
// Setup viewport, orthographic projection matrix