Merge branch 'blackmagic'

BAHAHAHHAHAHAHAAHAHAHAHHH

HARK HARK HARK HARK HA-*~

1 files changed, 142 insertions, 0 deletions

diff --git a/src/libui_sdl/libui/windows/gl.cpp b/src/libui_sdl/libui/windows/gl.cpp
new file mode 100644
index 0000000..1e3732c
--- /dev/null
+++ b/src/libui_sdl/libui/windows/gl.cpp
@@ -0,0 +1,142 @@
+// 31 march 2019
+#include "uipriv_windows.hpp"
+#include "area.hpp"
+
+#include <GL/gl.h>
+#include <GL/wglext.h>
+
+struct uiGLContext
+{
+    uiArea* a;
+
+    HWND hwnd;
+    HDC dc;
+    HGLRC rc;
+
+    unsigned int version;
+};
+
+
+uiGLContext* createGLContext(uiArea* a, int vermajor, int verminor)
+{
+    uiGLContext* ctx;
+    BOOL res;
+
+    ctx = uiNew(uiGLContext);
+
+    ctx->a = a;
+    ctx->hwnd = a->hwnd;
+
+    PIXELFORMATDESCRIPTOR pfd;
+    memset(&pfd, 0, sizeof(pfd));
+    pfd.nSize = sizeof(pfd);
+    pfd.nVersion = 1;
+    pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
+    pfd.iPixelType = PFD_TYPE_RGBA;
+    pfd.cColorBits = 24;
+    pfd.cAlphaBits = 8;
+    pfd.cDepthBits = 24;
+    pfd.cStencilBits = 8;
+    pfd.iLayerType = PFD_MAIN_PLANE;
+
+    ctx->dc = GetDC(ctx->hwnd);
+    if (!ctx->dc)
+    {
+        uiFree(ctx);
+        return NULL;
+    }
+
+    int pixelformat = ChoosePixelFormat(ctx->dc, &pfd);
+    res = SetPixelFormat(ctx->dc, pixelformat, &pfd);
+    if (!res)
+    {
+        ReleaseDC(ctx->hwnd, ctx->dc);
+        uiFree(ctx);
+        return NULL;
+    }
+
+    ctx->rc = wglCreateContext(ctx->dc);
+    if (!ctx->rc)
+    {
+        ReleaseDC(ctx->hwnd, ctx->dc);
+        uiFree(ctx);
+        return NULL;
+    }
+
+    wglMakeCurrent(ctx->dc, ctx->rc);
+
+    if (vermajor >= 3)
+    {
+        HGLRC (*wglCreateContextAttribsARB)(HDC,HGLRC,const int*);
+        HGLRC rc_better = NULL;
+
+        wglCreateContextAttribsARB = (HGLRC(*)(HDC,HGLRC,const int*))wglGetProcAddress("wglCreateContextAttribsARB");
+        if (wglCreateContextAttribsARB)
+        {
+            int attribs[15];
+            int i = 0;
+
+            attribs[i++] = WGL_CONTEXT_MAJOR_VERSION_ARB;
+            attribs[i++] = vermajor;
+            attribs[i++] = WGL_CONTEXT_MINOR_VERSION_ARB;
+            attribs[i++] = verminor;
+
+            attribs[i] = 0;
+            rc_better = wglCreateContextAttribsARB(ctx->dc, NULL, attribs);
+        }
+
+        wglMakeCurrent(NULL, NULL);
+        wglDeleteContext(ctx->rc);
+
+        if (!rc_better)
+        {
+            ReleaseDC(ctx->hwnd, ctx->dc);
+            uiFree(ctx);
+            return NULL;
+        }
+
+        ctx->version = uiGLVersion(vermajor, verminor);
+        ctx->rc = rc_better;
+        wglMakeCurrent(ctx->dc, ctx->rc);
+    }
+
+    return ctx;
+}
+
+void freeGLContext(uiGLContext* ctx)
+{
+    if (ctx == NULL) return;
+    wglMakeCurrent(NULL, NULL);
+    wglDeleteContext(ctx->rc);
+    ReleaseDC(ctx->hwnd, ctx->dc);
+    uiFree(ctx);
+}
+
+void uiGLMakeContextCurrent(uiGLContext* ctx)
+{
+    if (ctx == NULL)
+    {
+        wglMakeCurrent(NULL, NULL);
+        return;
+    }
+
+    if (wglGetCurrentContext() == ctx->rc) return;
+    int res = wglMakeCurrent(ctx->dc, ctx->rc);
+}
+
+unsigned int uiGLGetVersion(uiGLContext* ctx)
+{
+    if (ctx == NULL) return 0;
+    return ctx->version;
+}
+
+void *uiGLGetProcAddress(const char* proc)
+{
+    return (void*)wglGetProcAddress(proc);
+}
+
+void uiGLSwapBuffers(uiGLContext* ctx)
+{
+    if (ctx == NULL) return;
+    SwapBuffers(ctx->dc);
+}