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- Setup Contexts to pull more info from the GPU

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- Started outlining OpenGL implementation
This commit is contained in:
Medusa Slockbower
2025-07-28 21:06:52 -04:00
parent 7aafa4c9aa
commit 3d4ea4398a
11 changed files with 217 additions and 46 deletions
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73
source/platform/opengl/egl/context.cpp
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@@ -16,11 +16,14 @@
// along with this program. If not, see <https://www.gnu.org/licenses/>.
// =====================================================================================================================
#include <fennec/fproc/filesystem/file.h>
#include <fennec/lang/startup.h>
#include <fennec/platform/interface/display.h>
#include <fennec/platform/interface/platform.h>
#include <fennec/platform/opengl/egl/context.h>
#include <GL/gl.h>
namespace fennec
{
@@ -39,22 +42,15 @@ STATIC_CONSTRUCTOR(_egl_init) {
eglcontext::eglcontext(display* display)
: gfxcontext(display, "EGL", this) {
// Get the display format
const display::pixel_format& fmt = _display->get_color_format();
// Currently empty
EGLint context_attrs[] = {
#if FENNEC_GRAPHICS_OPENGL
EGL_CONTEXT_MAJOR_VERSION, 4,
EGL_CONTEXT_MINOR_VERSION, 3,
#elif FENNEC_GRAPHICS_GLES3
EGL_CONTEXT_MAJOR_VERSION, 3,
EGL_CONTEXT_MINOR_VERSION, 2,
#elif FENNEC_GRAPHICS_GLES2
EGL_CONTEXT_MAJOR_VERSION, 2,
EGL_CONTEXT_MINOR_VERSION, 0,
#endif
EGL_NONE
};
// Configure the depth and rgb bit-depth
EGLint config_attrs[] = {
EGL_SURFACE_TYPE,
EGL_WINDOW_BIT,
@@ -62,50 +58,59 @@ eglcontext::eglcontext(display* display)
EGL_RED_SIZE, fmt.r,
EGL_RED_SIZE, fmt.g,
EGL_RED_SIZE, fmt.b,
EGL_RENDERABLE_TYPE,
#if FENNEC_GRAPHICS_OPENGL
EGL_OPENGL_BIT,
#elif FENNEC_GRAPHICS_GLES3
EGL_OPENGL_ES3_BIT,
#elif FENNEC_GRAPHICS_GLES2
EGL_OPENGL_ES2_BIT,
#endif
EGL_RENDERABLE_TYPE,
EGL_OPENGL_BIT, // 7
EGL_NONE
};
// Attempt to retrieve an egl display from the native display
_egldisplay = eglGetDisplay(_display->get_native_handle());
if (_egldisplay == nullptr) {
cleanup();
return;
}
if (not eglInitialize(_egldisplay, &_eglvmajor, &_eglvminor)) {
// Attempt to initialize egl
if (not eglInitialize(_egldisplay, nullptr, nullptr)) {
cleanup();
return;
}
#if FENNEC_GRAPHICS_OPENGL
// Attempt to bind to Core OpenGL, otherwise OpenGL ES
if (not eglBindAPI(EGL_OPENGL_API)) {
#elif FENNEC_GRAPHICS_GLES3 or FENNEC_GRAPHICS_GLES2
if (not eglBindAPI(EGL_OPENGL_ES_API)) {
#endif
cleanup();
return;
if (not eglBindAPI(EGL_OPENGL_ES_API)) {
cleanup();
return;
}
config_attrs[7] = EGL_OPENGL_ES_BIT; // Change the support bit to OpenGL ES
}
// Select a configuration
EGLint n;
if (not eglChooseConfig(_egldisplay, config_attrs, &_eglconfig, 1, &n)) {
cleanup();
return;
}
// Create the context
_eglcontext = eglCreateContext(_egldisplay, _eglconfig, EGL_NO_CONTEXT, context_attrs);
if (_eglcontext == nullptr) {
cleanup();
return;
}
// make this the current context so we can retrieve the information below
eglMakeCurrent(_egldisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, _eglcontext);
// Query available extensions
const char* ptr = eglQueryString(_egldisplay, EGL_EXTENSIONS);
_extensions = { ptr, strlen(ptr) + 1 };
// Query the context and version
eglQueryContext(_egldisplay, _eglcontext, EGL_CONTEXT_CLIENT_TYPE, &_eglctype);
glGetIntegerv(GL_MAJOR_VERSION, &_eglvmajor);
glGetIntegerv(GL_MINOR_VERSION, &_eglvminor);
}
eglcontext::~eglcontext() {
@@ -116,6 +121,22 @@ bool eglcontext::connected() {
return _eglcontext != nullptr;
}
const cstring& eglcontext::get_context_name() {
static constexpr cstring opengl = "OpenGL";
static constexpr cstring gles = "GLES";
static constexpr cstring openvg = "OpenVG"; // this should never be used
switch (_eglctype) {
default:
case EGL_OPENGL_API: return opengl;
case EGL_OPENGL_ES_API: return gles;
case EGL_OPENVG_API: return openvg;
}
}
bool eglcontext::check_extension(const cstring& ext) {
return _extensions.find(ext) != _extensions.size();
}
void eglcontext::make_current(gfxsurface*) {
}