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Backends: OpenGL2, OpenGL3: fixed DrawCallback_ResetRenderState handler not reseting all states in the glTexParameter() path. (#9378)

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+ made OpenGL3 SetSamplerLinear/SetSamplerNearest check UseBindSampler for consistency.
This commit is contained in:
ocornut 2026-09-17 19:17:41 +02:00
parent b5135f270f
commit 333f5186e3
4 changed files with 14 additions and 11 deletions
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2
backends/imgui_impl_opengl2.cpp
View file

@ -132,6 +132,8 @@ static void ImGui_ImplOpenGL2_SetupRenderState(ImDrawData* draw_data, int fb_wid
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glShadeModel(GL_SMOOTH);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
bd->UseTexParameterToSetSampler = false;
bd->NextSampler = GL_LINEAR;
// If you are using this code with non-legacy OpenGL header/contexts (which you should not, prefer using imgui_impl_opengl3.cpp!!),

17
backends/imgui_impl_opengl3.cpp
View file

@ -387,9 +387,12 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, ImGui_Impl
glUniform1i(bd->AttribLocationTex, 0);
glUniformMatrix4fv(bd->AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
(void)render_state;
render_state->UseBindSampler = bd->HasBindSampler;
render_state->UseTexParameterFilter = false;
render_state->CurrentSampler = 0;
render_state->CurrentTexParameterFilter = 0;
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
if (render_state->UseBindSampler)
if (bd->HasBindSampler && render_state->UseBindSampler)
{
render_state->CurrentSampler = bd->TexSamplers[0];
glBindSampler(0, render_state->CurrentSampler); // We use combined texture/sampler state. Applications using GL 3.3 and GL ES 3.0 may set that otherwise.
@ -419,7 +422,7 @@ static void ImGui_ImplOpenGL3_DrawCallback_SetSamplerLinear(const ImDrawList*, c
ImGui_ImplOpenGL3_RenderState* render_state = ImGui_ImplOpenGL3_GetRenderState();
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
if (bd->HasBindSampler)
if (bd->HasBindSampler && render_state->UseBindSampler)
{
render_state->CurrentSampler = bd->TexSamplers[0];
render_state->UseTexParameterFilter = false;
@ -437,7 +440,7 @@ static void ImGui_ImplOpenGL3_DrawCallback_SetSamplerNearest(const ImDrawList*,
ImGui_ImplOpenGL3_RenderState* render_state = ImGui_ImplOpenGL3_GetRenderState();
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
if (bd->HasBindSampler)
if (bd->HasBindSampler && render_state->UseBindSampler)
{
render_state->CurrentSampler = bd->TexSamplers[1];
render_state->UseTexParameterFilter = false;
@ -522,11 +525,7 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
// Setup render state structure (for callbacks and custom texture bindings)
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
ImGui_ImplOpenGL3_RenderState render_state;
render_state.UseBindSampler = bd->HasBindSampler;
render_state.UseTexParameterFilter = false;
render_state.CurrentSampler = 0;
render_state.CurrentTexParameterFilter = 0;
ImGui_ImplOpenGL3_RenderState render_state = {};
platform_io.Renderer_RenderState = &render_state;
ImGui_ImplOpenGL3_SetupRenderState(draw_data, &render_state, fb_width, fb_height, vertex_array_object);

4
backends/imgui_impl_opengl3.h
View file

@ -73,8 +73,8 @@ struct ImGui_ImplOpenGL3_RenderState
{
bool UseBindSampler;
bool UseTexParameterFilter;
unsigned int CurrentSampler; // (GLuint) Used if UseBindSampler == true, otherwise always 0
unsigned int CurrentTexParameterFilter; // (GLuint) Used if UseTexParameterToSetSampler == true
unsigned int CurrentSampler; // (GLuint) Used if UseBindSampler == true (and are available), otherwise always 0
unsigned int CurrentTexParameterFilter; // (GLuint) Used if UseTexParameterFilter == true
};
static inline ImGui_ImplOpenGL3_RenderState* ImGui_ImplOpenGL3_GetRenderState() { return (ImGui_ImplOpenGL3_RenderState*)ImGui::GetPlatformIO().Renderer_RenderState; }

2
docs/CHANGELOG.txt
View file

@ -107,6 +107,8 @@ Other Changes:
- Added `Widgets->Mixed Values` section. (#5518, #5677, #6865)
- Backends:
- QNX: added QNX Screen backend. (#9492) [@mgorchak-blackberry]
- OpenGL2, OpenGL3: fixed `DrawCallback_ResetRenderState` handler not reseting all states
in the glTexParameter() path. (#9378)
- SDL2: fixed querying framebuffer scale/density when using Metal without
going through a SDL_Renderer. (#5592) [@lailoken]
- SDLRenderer3: restore any temporarily modified texture scale modes at the of `RenderDrawData()`. (#9378)