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Examples: GLFW+OpenGL3, SDL3+OpenGL3: Provide ES3 context creation code + failure handling. (#8197)

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Untested for GLFW example.
This commit is contained in:
ocornut
2024-12-09 12:55:33 +01:00
parent 6b348622bb
commit 921c22f5ad
2 changed files with 21 additions and 2 deletions
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8
examples/example_glfw_opengl3/main.cpp
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@@ -43,11 +43,17 @@ int main(int, char**)
// Decide GL+GLSL versions // Decide GL+GLSL versions
#if defined(IMGUI_IMPL_OPENGL_ES2) #if defined(IMGUI_IMPL_OPENGL_ES2)
// GL ES 2.0 + GLSL 100 // GL ES 2.0 + GLSL 100 (WebGL 1.0)
const char* glsl_version = "#version 100"; const char* glsl_version = "#version 100";
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2); glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0); glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API); glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
#elif defined(IMGUI_IMPL_OPENGL_ES3)
// GL ES 3.0 + GLSL 300 es (WebGL 2.0)
const char* glsl_version = "#version 300 es";
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
#elif defined(__APPLE__) #elif defined(__APPLE__)
// GL 3.2 + GLSL 150 // GL 3.2 + GLSL 150
const char* glsl_version = "#version 150"; const char* glsl_version = "#version 150";

15
examples/example_sdl3_opengl3/main.cpp
View File

@@ -35,12 +35,19 @@ int main(int, char**)
// Decide GL+GLSL versions // Decide GL+GLSL versions
#if defined(IMGUI_IMPL_OPENGL_ES2) #if defined(IMGUI_IMPL_OPENGL_ES2)
// GL ES 2.0 + GLSL 100 // GL ES 2.0 + GLSL 100 (WebGL 1.0)
const char* glsl_version = "#version 100"; const char* glsl_version = "#version 100";
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0); SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES); SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2); SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0); SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
#elif defined(IMGUI_IMPL_OPENGL_ES3)
// GL ES 3.0 + GLSL 300 es (WebGL 2.0)
const char* glsl_version = "#version 300 es";
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
#elif defined(__APPLE__) #elif defined(__APPLE__)
// GL 3.2 Core + GLSL 150 // GL 3.2 Core + GLSL 150
const char* glsl_version = "#version 150"; const char* glsl_version = "#version 150";
@@ -70,6 +77,12 @@ int main(int, char**)
} }
SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED); SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
SDL_GLContext gl_context = SDL_GL_CreateContext(window); SDL_GLContext gl_context = SDL_GL_CreateContext(window);
if (gl_context == nullptr)
{
printf("Error: SDL_GL_CreateContext(): %s\n", SDL_GetError());
return -1;
}
SDL_GL_MakeCurrent(window, gl_context); SDL_GL_MakeCurrent(window, gl_context);
SDL_GL_SetSwapInterval(1); // Enable vsync SDL_GL_SetSwapInterval(1); // Enable vsync
SDL_ShowWindow(window); SDL_ShowWindow(window);