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Backends: OpenGL3: Fix to avoid calling glBindSampler() with version <= 3.2 (#3467, #1985)

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(nb: GLEW sets the define we previously used)
This commit is contained in:
Julian Webb 2020-09-10 13:02:45 -05:00 committed by ocornut
parent 645a6e0342
commit 2460f2abe3
1 changed files with 12 additions and 7 deletions
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13
examples/imgui_impl_opengl3.cpp
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@ -263,7 +263,9 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_wid
glUseProgram(g_ShaderHandle);
glUniform1i(g_AttribLocationTex, 0);
glUniformMatrix4fv(g_AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
#ifdef GL_SAMPLER_BINDING
#if (!defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3))
if(g_GlVersion > 320)
glBindSampler(0, 0); // We use combined texture/sampler state. Applications using GL 3.3 may set that otherwise.
#endif
@ -299,8 +301,10 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
glActiveTexture(GL_TEXTURE0);
GLuint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, (GLint*)&last_program);
GLuint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*)&last_texture);
#ifdef GL_SAMPLER_BINDING
GLuint last_sampler; glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler);
#if (!defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3))
GLuint last_sampler;
if(g_GlVersion > 320)
glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler);
#endif
GLuint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, (GLint*)&last_array_buffer);
#ifndef IMGUI_IMPL_OPENGL_ES2
@ -391,7 +395,8 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
// Restore modified GL state
glUseProgram(last_program);
glBindTexture(GL_TEXTURE_2D, last_texture);
#ifdef GL_SAMPLER_BINDING
#if (!defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3))
if(g_GlVersion > 320)
glBindSampler(0, last_sampler);
#endif
glActiveTexture(last_active_texture);