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Backends: OpenGL3: Backup and restore GL_PIXEL_UNPACK_BUFFER. (#7253)

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Amended with (bd->GlVersion >= 210) checks.
This commit is contained in:
Clément Gallet 2024-01-22 17:51:24 +01:00 committed by ocornut
parent 81e0be856a
commit 1ce41f6218
3 changed files with 15 additions and 0 deletions
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12
backends/imgui_impl_opengl3.cpp
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@ -191,6 +191,11 @@
#define IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
#endif
// Desktop GL and GL ES 3.0+ have glBindBuffer() with GL_PIXEL_UNPACK_BUFFER target.
#if !defined(IMGUI_IMPL_OPENGL_ES2)
#define IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_BUFFER_PIXEL_UNPACK
#endif
// Desktop GL 3.1+ has GL_PRIMITIVE_RESTART state
#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && defined(GL_VERSION_3_1)
#define IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
@ -747,6 +752,10 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
GLint last_texture, last_array_buffer;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_BUFFER_PIXEL_UNPACK
GLint last_pixel_unpack_buffer;
if (bd->GlVersion >= 210) { glGetIntegerv(GL_PIXEL_UNPACK_BUFFER_BINDING, &last_pixel_unpack_buffer); glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0); }
#endif
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
GLint last_vertex_array;
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
@ -920,6 +929,9 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
// Restore modified GL state
glBindTexture(GL_TEXTURE_2D, last_texture);
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_BUFFER_PIXEL_UNPACK
if (bd->GlVersion >= 210) { glBindBuffer(GL_PIXEL_UNPACK_BUFFER, last_pixel_unpack_buffer); }
#endif
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
glBindVertexArray(last_vertex_array);
#endif

2
backends/imgui_impl_opengl3_loader.h
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@ -260,6 +260,8 @@ typedef khronos_intptr_t GLintptr;
#define GL_ARRAY_BUFFER_BINDING 0x8894
#define GL_ELEMENT_ARRAY_BUFFER_BINDING 0x8895
#define GL_STREAM_DRAW 0x88E0
#define GL_PIXEL_UNPACK_BUFFER 0x88EC
#define GL_PIXEL_UNPACK_BUFFER_BINDING 0x88EF
typedef void (APIENTRYP PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
typedef void (APIENTRYP PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint *buffers);
typedef void (APIENTRYP PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);

1
docs/CHANGELOG.txt
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@ -64,6 +64,7 @@ Other changes:
- Backends: WebGPU: Filling all WGPUDepthStencilState fields explicitly as a recent Dawn
update stopped setting default values. (#7232) [@GrigoryGraborenko]
- Backends: WebGPU: Fixed pipeline layout leak. (#7245) [@rajveermalviya]
- Backends: OpenGL3: Backup and restore GL_PIXEL_UNPACK_BUFFER. (#7253)
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