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save and restore sampler in GL 3 examples

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This commit is contained in:
Nicolas Guillemot
2017-05-16 16:43:59 -07:00
parent 0828a1fd6c
commit ad3c1e68ab
2 changed files with 6 additions and 0 deletions
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3
examples/sdl_opengl3_example/imgui_impl_sdl_gl3.cpp
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@@ -42,6 +42,7 @@ void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data)
glActiveTexture(GL_TEXTURE0);
GLint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, &last_program);
GLint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
GLint last_sampler; glGetIntegerv(GL_SAMPLER_BINDING, &last_sampler);
GLint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
GLint last_element_array_buffer; glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &last_element_array_buffer);
GLint last_vertex_array; glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
@@ -101,6 +102,7 @@ void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data)
else
{
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->TextureId);
glBindSampler(0, 0); // rely on combined texture/sampler state.
glScissor((int)pcmd->ClipRect.x, (int)(fb_height - pcmd->ClipRect.w), (int)(pcmd->ClipRect.z - pcmd->ClipRect.x), (int)(pcmd->ClipRect.w - pcmd->ClipRect.y));
glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, idx_buffer_offset);
}
@@ -111,6 +113,7 @@ void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data)
// Restore modified GL state
glUseProgram(last_program);
glBindTexture(GL_TEXTURE_2D, last_texture);
glBindSampler(0, last_sampler);
glActiveTexture(last_active_texture);
glBindVertexArray(last_vertex_array);
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);