mirror of
https://github.com/ocornut/imgui.git
synced 2024-11-12 02:00:58 +01:00
Backends: OpenGL3: Fix building with pre-3.2 GL bindings which do not expose glDrawElementsBaseVertex(), using runtime GL version to decide if we set ImGuiBackendFlags_RendererHasVtxOffset. (#2866, #2852) [@dpilawa]
This commit is contained in:
parent
4d0c88e9e6
commit
f002a11898
@ -73,6 +73,8 @@ Other Changes:
|
||||
- Demo: Added simple item reordering demo in Widgets -> Drag and Drop section. (#2823, #143) [@rokups]
|
||||
- Examples: DX12: Using IDXGIDebug1::ReportLiveObjects() when DX12_ENABLE_DEBUG_LAYER is enabled.
|
||||
- Examples: Emscripten: Removed NO_FILESYSTEM from Makefile, seems to fail on some setup. (#2734) [@Funto]
|
||||
- Backends: OpenGL3: Fix building with pre-3.2 GL loaders which do not expose glDrawElementsBaseVertex(),
|
||||
using runtime GL version to decide if we set ImGuiBackendFlags_RendererHasVtxOffset. (#2866, #2852) [@dpilawa]
|
||||
- Backends: OSX: Fix using Backspace key. (#2578, #2817, #2818) [@DiligentGraphics]
|
||||
- Backends: GLFW: Previously installed user callbacks are now restored on shutdown. (#2836) [@malte-v]
|
||||
- CI: Set up a bunch of continuous-integration tests using GitHub Actions. We now compile many of the example
|
||||
|
@ -13,6 +13,7 @@
|
||||
|
||||
// CHANGELOG
|
||||
// (minor and older changes stripped away, please see git history for details)
|
||||
// 2019-10-25: OpenGL: Using a combination of GL define and runtime GL version to decide whether to use glDrawElementsBaseVertex(). Fix building with pre-3.2 GL loaders.
|
||||
// 2019-09-22: OpenGL: Detect default GL loader using __has_include compiler facility.
|
||||
// 2019-09-16: OpenGL: Tweak initialization code to allow application calling ImGui_ImplOpenGL3_CreateFontsTexture() before the first NewFrame() call.
|
||||
// 2019-05-29: OpenGL: Desktop GL only: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
|
||||
@ -77,7 +78,7 @@
|
||||
#include "TargetConditionals.h"
|
||||
#endif
|
||||
|
||||
// Auto-detect GL version
|
||||
// Auto-enable GLES on matching platforms
|
||||
#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3)
|
||||
#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV)) || (defined(__ANDROID__))
|
||||
#define IMGUI_IMPL_OPENGL_ES3 // iOS, Android -> GL ES 3, "#version 300 es"
|
||||
@ -99,9 +100,9 @@
|
||||
#include <GLES2/gl2.h>
|
||||
#elif defined(IMGUI_IMPL_OPENGL_ES3)
|
||||
#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV))
|
||||
#include <OpenGLES/ES3/gl.h> // Use GL ES 3
|
||||
#include <OpenGLES/ES3/gl.h> // Use GL ES 3
|
||||
#else
|
||||
#include <GLES3/gl3.h> // Use GL ES 3
|
||||
#include <GLES3/gl3.h> // Use GL ES 3
|
||||
#endif
|
||||
#else
|
||||
// About Desktop OpenGL function loaders:
|
||||
@ -119,16 +120,16 @@
|
||||
#endif
|
||||
#endif
|
||||
|
||||
// Desktop GL has glDrawElementsBaseVertex() which GL ES and WebGL don't have.
|
||||
// Desktop GL 3.2+ has glDrawElementsBaseVertex() which GL ES and WebGL don't have.
|
||||
#if defined(IMGUI_IMPL_OPENGL_ES2) || defined(IMGUI_IMPL_OPENGL_ES3) || !defined(GL_VERSION_3_2)
|
||||
#define IMGUI_IMPL_OPENGL_MAY_HAVE_DRAW_WITH_BASE_VERTEX 0
|
||||
#define IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET 0
|
||||
#else
|
||||
#define IMGUI_IMPL_OPENGL_MAY_HAVE_DRAW_WITH_BASE_VERTEX 1
|
||||
#define IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET 1
|
||||
#endif
|
||||
|
||||
// OpenGL Data
|
||||
static char g_GlslVersionString[32] = "";
|
||||
static GLuint g_GlVersion = 0;
|
||||
static GLuint g_GlVersion = 0; // Extracted at runtime using GL_MAJOR_VERSION, GL_MINOR_VERSION queries.
|
||||
static char g_GlslVersionString[32] = ""; // Specified by user or detected based on compile time GL settings.
|
||||
static GLuint g_FontTexture = 0;
|
||||
static GLuint g_ShaderHandle = 0, g_VertHandle = 0, g_FragHandle = 0;
|
||||
static int g_AttribLocationTex = 0, g_AttribLocationProjMtx = 0; // Uniforms location
|
||||
@ -138,11 +139,11 @@ static unsigned int g_VboHandle = 0, g_ElementsHandle = 0;
|
||||
// Functions
|
||||
bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
|
||||
{
|
||||
// query for GL version
|
||||
// Query for GL version
|
||||
#if !defined(IMGUI_IMPL_OPENGL_ES2)
|
||||
GLint major, minor;
|
||||
glGetIntegerv (GL_MAJOR_VERSION, &major);
|
||||
glGetIntegerv (GL_MINOR_VERSION, &minor);
|
||||
glGetIntegerv(GL_MAJOR_VERSION, &major);
|
||||
glGetIntegerv(GL_MINOR_VERSION, &minor);
|
||||
g_GlVersion = major * 1000 + minor;
|
||||
#else
|
||||
g_GlVersion = 2000; // GLES 2
|
||||
@ -151,12 +152,13 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
|
||||
// Setup back-end capabilities flags
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
io.BackendRendererName = "imgui_impl_opengl3";
|
||||
#if IMGUI_IMPL_OPENGL_MAY_HAVE_DRAW_WITH_BASE_VERTEX
|
||||
#if IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
|
||||
if (g_GlVersion >= 3200)
|
||||
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
|
||||
#endif
|
||||
|
||||
// Store GLSL version string so we can refer to it later in case we recreate shaders. Note: GLSL version is NOT the same as GL version. Leave this to NULL if unsure.
|
||||
// Store GLSL version string so we can refer to it later in case we recreate shaders.
|
||||
// Note: GLSL version is NOT the same as GL version. Leave this to NULL if unsure.
|
||||
#if defined(IMGUI_IMPL_OPENGL_ES2)
|
||||
if (glsl_version == NULL)
|
||||
glsl_version = "#version 100";
|
||||
@ -356,14 +358,12 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
||||
|
||||
// Bind texture, Draw
|
||||
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->TextureId);
|
||||
#if IMGUI_IMPL_OPENGL_MAY_HAVE_DRAW_WITH_BASE_VERTEX
|
||||
#if IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
|
||||
if (g_GlVersion >= 3200)
|
||||
glDrawElementsBaseVertex(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)), (GLint)pcmd->VtxOffset);
|
||||
else
|
||||
glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)));
|
||||
#else
|
||||
glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)));
|
||||
#endif
|
||||
glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user