Merge branch 'blackmagic'

BAHAHAHHAHAHAHAAHAHAHAHHH

HARK HARK HARK HARK HA-*~

8 files changed, 294 insertions, 16 deletions

diff --git a/src/libui_sdl/libui/ui.h b/src/libui_sdl/libui/ui.h
index 5f40aff..d2e9960 100644
--- a/src/libui_sdl/libui/ui.h
+++ b/src/libui_sdl/libui/ui.h
@@ -108,6 +108,8 @@ typedef struct uiWindow uiWindow;
 #define uiWindow(this) ((uiWindow *) (this))
 _UI_EXTERN char *uiWindowTitle(uiWindow *w);
 _UI_EXTERN void uiWindowSetTitle(uiWindow *w, const char *title);
+_UI_EXTERN void uiWindowPosition(uiWindow *w, int *x, int *y);
+_UI_EXTERN void uiWindowSetPosition(uiWindow *w, int x, int y);
 _UI_EXTERN void uiWindowContentSize(uiWindow *w, int *width, int *height);
 _UI_EXTERN void uiWindowSetContentSize(uiWindow *w, int width, int height);
 _UI_EXTERN int uiWindowMinimized(uiWindow *w);
@@ -326,6 +328,10 @@ _UI_ENUM(uiWindowResizeEdge) {
 	// TODO way to bring up the system menu instead?
 };
 
+#define uiGLVersion(major, minor)  ((major) | ((minor)<<16))
+#define uiGLVerMajor(ver)          ((ver) & 0xFFFF)
+#define uiGLVerMinor(ver)          ((ver) >> 16)
+
 #define uiArea(this) ((uiArea *) (this))
 // TODO give a better name
 // TODO document the types of width and height
@@ -342,6 +348,7 @@ _UI_EXTERN void uiAreaBeginUserWindowMove(uiArea *a);
 _UI_EXTERN void uiAreaBeginUserWindowResize(uiArea *a, uiWindowResizeEdge edge);
 _UI_EXTERN void uiAreaSetBackgroundColor(uiArea *a, int r, int g, int b);
 _UI_EXTERN uiArea *uiNewArea(uiAreaHandler *ah);
+_UI_EXTERN uiArea *uiNewGLArea(uiAreaHandler *ah, const unsigned int* req_versions);
 _UI_EXTERN uiArea *uiNewScrollingArea(uiAreaHandler *ah, int width, int height);
 
 struct uiAreaDrawParams {
@@ -599,6 +606,18 @@ _UI_EXTERN void uiDrawTextLayoutSetColor(uiDrawTextLayout *layout, int startChar
 
 _UI_EXTERN void uiDrawText(uiDrawContext *c, double x, double y, uiDrawTextLayout *layout);
 
+
+// OpenGL support
+
+typedef struct uiGLContext uiGLContext;
+
+_UI_EXTERN uiGLContext *uiAreaGetGLContext(uiArea* a);
+_UI_EXTERN void uiGLMakeContextCurrent(uiGLContext* ctx);
+_UI_EXTERN unsigned int uiGLGetVersion(uiGLContext* ctx);
+_UI_EXTERN void *uiGLGetProcAddress(const char* proc);
+_UI_EXTERN void uiGLSwapBuffers(uiGLContext* ctx);
+
+
 _UI_ENUM(uiModifiers) {
 	uiModifierCtrl = 1 << 0,
 	uiModifierAlt = 1 << 1,
diff --git a/src/libui_sdl/libui/windows/area.cpp b/src/libui_sdl/libui/windows/area.cpp
index 2185f25..72d5145 100644
--- a/src/libui_sdl/libui/windows/area.cpp
+++ b/src/libui_sdl/libui/windows/area.cpp
@@ -25,8 +25,11 @@ static LRESULT CALLBACK areaWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM
 	}
 
 	// always recreate the render target if necessary
-	if (a->rt == NULL)
-		a->rt = makeHWNDRenderTarget(a->hwnd);
+	if (!a->openGL)
+    {
+        if (a->rt == NULL)
+            a->rt = makeHWNDRenderTarget(a->hwnd);
+    }
 
 	if (areaDoDraw(a, uMsg, wParam, lParam, &lResult) != FALSE)
 		return lResult;
@@ -34,12 +37,14 @@ static LRESULT CALLBACK areaWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM
 	if (uMsg == WM_WINDOWPOSCHANGED) {
 		if ((wp->flags & SWP_NOSIZE) != 0)
 			return DefWindowProcW(hwnd, uMsg, wParam, lParam);
+        a->width = -1;
+        a->height = -1;
 		uiWindowsEnsureGetClientRect(a->hwnd, &client);
 		areaDrawOnResize(a, &client);
 		areaScrollOnResize(a, &client);
 		{
 		    double w, h;
-		    loadAreaSize(a, a->rt, &w, &h);
+		    loadAreaSize(a, &w, &h);
 		    a->ah->Resize(a->ah, a, (int)w, (int)h);
 		}
 		return 0;
@@ -56,7 +61,15 @@ static LRESULT CALLBACK areaWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM
 
 // control implementation
 
-uiWindowsControlAllDefaults(uiArea)
+uiWindowsControlAllDefaultsExceptDestroy(uiArea)
+
+static void uiAreaDestroy(uiControl *c)
+{
+    uiArea* a = uiArea(c);
+    if (a->openGL && a->glcontext) freeGLContext(a->glcontext);
+    uiWindowsEnsureDestroyWindow(a->hwnd);
+    uiFreeControl(c);
+}
 
 static void uiAreaMinimumSize(uiWindowsControl *c, int *width, int *height)
 {
@@ -182,6 +195,9 @@ uiArea *uiNewArea(uiAreaHandler *ah)
 
 	uiWindowsNewControl(uiArea, a);
 
+	a->width = -1;
+	a->height = -1;
+
 	a->ah = ah;
 	a->scrolling = FALSE;
 	clickCounterReset(&(a->cc));
@@ -195,6 +211,50 @@ uiArea *uiNewArea(uiAreaHandler *ah)
 
     uiAreaSetBackgroundColor(a, -1, -1, -1);
 
+    a->openGL = 0;
+
+	return a;
+}
+
+uiGLContext *uiAreaGetGLContext(uiArea* a)
+{
+    if (!a->openGL) userbug("trying to get GL context from non-GL area");
+
+    return a->glcontext;
+}
+
+uiArea *uiNewGLArea(uiAreaHandler *ah, const unsigned int* req_versions)
+{
+	uiArea *a;
+
+	uiWindowsNewControl(uiArea, a);
+
+	a->width = -1;
+	a->height = -1;
+
+	a->ah = ah;
+	a->scrolling = FALSE;
+	clickCounterReset(&(a->cc));
+
+	// a->hwnd is assigned in areaWndProc()
+	uiWindowsEnsureCreateControlHWND(0,
+		areaClass, L"",
+		0,
+		hInstance, a,
+		FALSE);
+
+    uiAreaSetBackgroundColor(a, -1, -1, -1);
+
+    a->openGL = 1;
+
+    for (int i = 0; req_versions[i]; i++)
+    {
+        int major = uiGLVerMajor(req_versions[i]);
+        int minor = uiGLVerMinor(req_versions[i]);
+        a->glcontext = createGLContext(a, major, minor);
+        if (a->glcontext) break;
+    }
+
 	return a;
 }
 
@@ -204,6 +264,9 @@ uiArea *uiNewScrollingArea(uiAreaHandler *ah, int width, int height)
 
 	uiWindowsNewControl(uiArea, a);
 
+	a->width = -1;
+	a->height = -1;
+
 	a->ah = ah;
 	a->scrolling = TRUE;
 	a->scrollWidth = width;
@@ -219,6 +282,8 @@ uiArea *uiNewScrollingArea(uiAreaHandler *ah, int width, int height)
 
     uiAreaSetBackgroundColor(a, -1, -1, -1);
 
+    a->openGL = 0; // TODO, eventually???
+
 	// set initial scrolling parameters
 	areaUpdateScroll(a);
 
diff --git a/src/libui_sdl/libui/windows/area.hpp b/src/libui_sdl/libui/windows/area.hpp
index add62dd..cfc45a4 100644
--- a/src/libui_sdl/libui/windows/area.hpp
+++ b/src/libui_sdl/libui/windows/area.hpp
@@ -10,6 +10,8 @@ struct uiArea {
 	HWND hwnd;
 	uiAreaHandler *ah;
 
+	int width, height;
+
 	BOOL scrolling;
 	int scrollWidth;
 	int scrollHeight;
@@ -26,6 +28,9 @@ struct uiArea {
 
 	int bgR, bgG, bgB;
 
+	int openGL;
+	uiGLContext* glcontext;
+
 	ID2D1HwndRenderTarget *rt;
 };
 
@@ -42,6 +47,10 @@ extern void areaUpdateScroll(uiArea *a);
 extern BOOL areaDoEvents(uiArea *a, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *lResult);
 
 // areautil.cpp
-extern void loadAreaSize(uiArea *a, ID2D1RenderTarget *rt, double *width, double *height);
+extern void loadAreaSize(uiArea *a, double *width, double *height);
 extern void pixelsToDIP(uiArea *a, double *x, double *y);
 extern void dipToPixels(uiArea *a, double *x, double *y);
+
+// gl.cpp
+extern uiGLContext* createGLContext(uiArea* a, int vermajor, int verminor);
+extern void freeGLContext(uiGLContext* c);
diff --git a/src/libui_sdl/libui/windows/areadraw.cpp b/src/libui_sdl/libui/windows/areadraw.cpp
index a9ad477..f369255 100644
--- a/src/libui_sdl/libui/windows/areadraw.cpp
+++ b/src/libui_sdl/libui/windows/areadraw.cpp
@@ -6,6 +6,13 @@ static HRESULT doPaint(uiArea *a, ID2D1RenderTarget *rt, RECT *clip)
 {
 	uiAreaHandler *ah = a->ah;
 	uiAreaDrawParams dp;
+
+	if (a->openGL)
+    {
+        //(*(ah->Draw))(ah, a, &dp);
+        return S_OK;
+    }
+
 	COLORREF bgcolorref;
 	D2D1_COLOR_F bgcolor;
 	D2D1_MATRIX_3X2_F scrollTransform;
@@ -13,7 +20,7 @@ static HRESULT doPaint(uiArea *a, ID2D1RenderTarget *rt, RECT *clip)
 	// no need to save or restore the graphics state to reset transformations;  it's handled by resetTarget() in draw.c, called during the following
 	dp.Context = newContext(rt);
 
-	loadAreaSize(a, rt, &(dp.AreaWidth), &(dp.AreaHeight));
+	loadAreaSize(a, &(dp.AreaWidth), &(dp.AreaHeight));
 
 	dp.ClipX = clip->left;
 	dp.ClipY = clip->top;
@@ -113,6 +120,9 @@ static void onWM_PAINT(uiArea *a)
 
 static void onWM_PRINTCLIENT(uiArea *a, HDC dc)
 {
+    // TODO????
+    if (a->openGL) return;
+
 	ID2D1DCRenderTarget *rt;
 	RECT client;
 	HRESULT hr;
@@ -143,13 +153,16 @@ BOOL areaDoDraw(uiArea *a, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *lRe
 // TODO only if the render target wasn't just created?
 void areaDrawOnResize(uiArea *a, RECT *newClient)
 {
-	D2D1_SIZE_U size;
+    if (!a->openGL)
+    {
+        D2D1_SIZE_U size;
 
-	size.width = newClient->right - newClient->left;
-	size.height = newClient->bottom - newClient->top;
-	// don't track the error; we'll get that in EndDraw()
-	// see https://msdn.microsoft.com/en-us/library/windows/desktop/dd370994%28v=vs.85%29.aspx
-	a->rt->Resize(&size);
+        size.width = newClient->right - newClient->left;
+        size.height = newClient->bottom - newClient->top;
+        // don't track the error; we'll get that in EndDraw()
+        // see https://msdn.microsoft.com/en-us/library/windows/desktop/dd370994%28v=vs.85%29.aspx
+        a->rt->Resize(&size);
+    }
 
 	// according to Rick Brewster, we must always redraw the entire client area after calling ID2D1RenderTarget::Resize() (see http://stackoverflow.com/a/33222983/3408572)
 	// we used to have a uiAreaHandler.RedrawOnResize() method to decide this; now you know why we don't anymore
diff --git a/src/libui_sdl/libui/windows/areaevents.cpp b/src/libui_sdl/libui/windows/areaevents.cpp
index 3ff7a47..46d6ab9 100644
--- a/src/libui_sdl/libui/windows/areaevents.cpp
+++ b/src/libui_sdl/libui/windows/areaevents.cpp
@@ -109,7 +109,7 @@ static void areaMouseEvent(uiArea *a, int down, int  up, WPARAM wParam, LPARAM l
 		me.Y += a->vscrollpos;
 	}
 
-	loadAreaSize(a, NULL, &(me.AreaWidth), &(me.AreaHeight));
+	loadAreaSize(a, &(me.AreaWidth), &(me.AreaHeight));
 
 	me.Down = down;
 	me.Up = up;
diff --git a/src/libui_sdl/libui/windows/areautil.cpp b/src/libui_sdl/libui/windows/areautil.cpp
index 212ea42..ea13221 100644
--- a/src/libui_sdl/libui/windows/areautil.cpp
+++ b/src/libui_sdl/libui/windows/areautil.cpp
@@ -2,20 +2,35 @@
 #include "uipriv_windows.hpp"
 #include "area.hpp"
 
-void loadAreaSize(uiArea *a, ID2D1RenderTarget *rt, double *width, double *height)
+// TODO: make those int rather than double
+void loadAreaSize(uiArea *a, double *width, double *height)
 {
 	D2D1_SIZE_F size;
 
+	if (a->width != -1)
+    {
+        *width = (double)a->width;
+        *height = (double)a->height;
+        return;
+    }
+
 	*width = 0;
 	*height = 0;
 	if (!a->scrolling) {
-		if (rt == NULL)
+		/*if (rt == NULL)
 			rt = a->rt;
 		size = realGetSize(rt);
 		*width = size.width;
 		*height = size.height;
-		dipToPixels(a, width, height);
+		dipToPixels(a, width, height);*/
+		RECT rect;
+        GetWindowRect(a->hwnd, &rect);
+        *width = (double)(rect.right - rect.left);
+        *height = (double)(rect.bottom - rect.top);
 	}
+
+	a->width = (int)*width;
+	a->height = (int)*height;
 }
 
 void pixelsToDIP(uiArea *a, double *x, double *y)
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);
+}
diff --git a/src/libui_sdl/libui/windows/window.cpp b/src/libui_sdl/libui/windows/window.cpp
index f52e2f6..18d1171 100644
--- a/src/libui_sdl/libui/windows/window.cpp
+++ b/src/libui_sdl/libui/windows/window.cpp
@@ -363,6 +363,21 @@ static void windowMonitorRect(HWND hwnd, RECT *r)
 	*r = mi.rcMonitor;
 }
 
+void uiWindowPosition(uiWindow *w, int *x, int *y)
+{
+    RECT rect;
+    if (GetWindowRect(w->hwnd, &rect) == 0)
+        logLastError(L"error getting window position");
+    *x = rect.left;
+    *y = rect.top;
+}
+
+void uiWindowSetPosition(uiWindow *w, int x, int y)
+{
+    if (SetWindowPos(w->hwnd, NULL, x, y, 0, 0, SWP_NOACTIVATE | SWP_NOSIZE | SWP_NOOWNERZORDER | SWP_NOZORDER) == 0)
+        logLastError(L"error moving window");
+}
+
 void uiWindowContentSize(uiWindow *w, int *width, int *height)
 {
 	RECT r;