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Examples: OpenGL3: Saving/restoring the Enable state, better than nothing (#347)

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This commit is contained in:
ocornut 2015-09-23 09:14:27 +02:00
parent 98465d401b
commit d5502cdd6d
1 changed files with 8 additions and 1 deletions
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9
examples/opengl3_example/imgui_impl_glfw_gl3.cpp
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@ -37,6 +37,10 @@ void ImGui_ImplGlfwGL3_RenderDrawLists(ImDrawData* draw_data)
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &last_element_array_buffer);
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
GLboolean last_enable_blend = glIsEnabled(GL_BLEND);
GLboolean last_enable_cull_face = glIsEnabled(GL_CULL_FACE);
GLboolean last_enable_depth_test = glIsEnabled(GL_DEPTH_TEST);
GLboolean last_enable_scissor_test = glIsEnabled(GL_SCISSOR_TEST);
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled
glEnable(GL_BLEND);
@ -98,7 +102,10 @@ void ImGui_ImplGlfwGL3_RenderDrawLists(ImDrawData* draw_data)
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, last_element_array_buffer);
glBindVertexArray(last_vertex_array);
glDisable(GL_SCISSOR_TEST);
if (last_enable_blend) glEnable(GL_BLEND); else glDisable(GL_BLEND);
if (last_enable_cull_face) glEnable(GL_CULL_FACE); else glDisable(GL_CULL_FACE);
if (last_enable_depth_test) glEnable(GL_DEPTH_TEST); else glDisable(GL_DEPTH_TEST);
if (last_enable_scissor_test) glEnable(GL_SCISSOR_TEST); else glDisable(GL_SCISSOR_TEST);
}
static const char* ImGui_ImplGlfwGL3_GetClipboardText()