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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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17
examples/imgui_impl_opengl3.cpp
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@@ -263,8 +263,10 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_wid
glUseProgram(g_ShaderHandle); glUseProgram(g_ShaderHandle);
glUniform1i(g_AttribLocationTex, 0); glUniform1i(g_AttribLocationTex, 0);
glUniformMatrix4fv(g_AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]); glUniformMatrix4fv(g_AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
#ifdef GL_SAMPLER_BINDING
glBindSampler(0, 0); // We use combined texture/sampler state. Applications using GL 3.3 may set that otherwise. #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 #endif
(void)vertex_array_object; (void)vertex_array_object;
@@ -299,8 +301,10 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
glActiveTexture(GL_TEXTURE0); glActiveTexture(GL_TEXTURE0);
GLuint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, (GLint*)&last_program); GLuint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, (GLint*)&last_program);
GLuint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*)&last_texture); GLuint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*)&last_texture);
#ifdef GL_SAMPLER_BINDING #if (!defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3))
GLuint last_sampler; glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler); GLuint last_sampler;
if(g_GlVersion > 320)
glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler);
#endif #endif
GLuint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, (GLint*)&last_array_buffer); GLuint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, (GLint*)&last_array_buffer);
#ifndef IMGUI_IMPL_OPENGL_ES2 #ifndef IMGUI_IMPL_OPENGL_ES2
@@ -391,8 +395,9 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
// Restore modified GL state // Restore modified GL state
glUseProgram(last_program); glUseProgram(last_program);
glBindTexture(GL_TEXTURE_2D, last_texture); glBindTexture(GL_TEXTURE_2D, last_texture);
#ifdef GL_SAMPLER_BINDING #if (!defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3))
glBindSampler(0, last_sampler); if(g_GlVersion > 320)
glBindSampler(0, last_sampler);
#endif #endif
glActiveTexture(last_active_texture); glActiveTexture(last_active_texture);
#ifndef IMGUI_IMPL_OPENGL_ES2 #ifndef IMGUI_IMPL_OPENGL_ES2