1 files changed, 171 insertions, 0 deletions
diff --git a/src/gwin/gwin_gl3d.c b/src/gwin/gwin_gl3d.c
new file mode 100644
index 00000000..e04875c0
--- /dev/null
+++ b/src/gwin/gwin_gl3d.c
@@ -0,0 +1,171 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/**
+ * @file    src/gwin/gwin_gl3d.c
+ * @brief   GWIN sub-system button code
+ */
+
+#include "gfx.h"
+
+#if GFX_USE_GWIN && GWIN_NEED_GL3D
+
+#if GDISP_PIXELFORMAT != GDISP_PIXELFORMAT_RGB565
+	#error "GWIN: GL3D only support GDISP_PIXELFORMAT_RGB565 color format (TinyGL limitation)"
+#endif
+
+#include "src/gwin/class_gwin.h"
+
+#include "3rdparty/tinygl-0.4-ugfx/src/zgl.h"
+
+// Forward definitions
+static void gl3dDestroy(GWindowObject *gh);
+static void gl3dRedraw(GWindowObject *gh);
+static int gl3dResizeGLViewport(GLContext *c, int *xsize_ptr, int *ysize_ptr);
+
+static const gwinVMT gl3dVMT = {
+		"GL3D",					// The classname
+		sizeof(GGL3DObject),	// The object size
+		gl3dDestroy,			// The destroy routine
+		gl3dRedraw,				// The redraw routine
+		0,						// The after-clear routine
+};
+
+static bool_t	haveGLwindow = FALSE;
+
+GHandle gwinGGL3DCreate(GDisplay *g, GGL3DObject *gl, const GWindowInit *pInit) {
+	ZBuffer *	zb;
+	GLContext *	glcxt;
+
+	// Only one GL3D window allowed at a time (TinyGL limitation)
+	if (haveGLwindow)
+		return 0;
+
+	if (!(gl = (GGL3DObject *)_gwindowCreate(g, &gl->g, pInit, &gl3dVMT, 0)))
+		return 0;
+
+	// Must be a multiple of 4 bytes
+	gl->g.width &= ~3;
+	gl->g.height &= ~3;
+
+    zb = ZB_open(gl->g.width, gl->g.height, ZB_MODE_5R6G5B, 0, NULL, NULL, NULL);
+    if (!zb) {
+		if ((gl->g.flags & GWIN_FLG_DYNAMIC))
+			gfxFree(gl);
+		return 0;
+    }
+
+    /* initialisation of the TinyGL interpreter */
+    glInit(zb);
+    gl->glcxt = glcxt = gl_get_context();
+    glcxt->opaque = gl;
+    glcxt->gl_resize_viewport = gl3dResizeGLViewport;
+
+    /* set the viewport : we force a call to the viewport resize routine */
+    glcxt->viewport.xsize=-1;
+    glcxt->viewport.ysize=-1;
+
+    glViewport(0, 0, gl->g.width, gl->g.height);
+
+    haveGLwindow = TRUE;
+	gwinSetVisible((GHandle)gl, pInit->show);
+	return (GHandle)gl;
+}
+
+static void gl3dDestroy(GWindowObject *gh) {
+	(void) gh;
+    glClose();
+    haveGLwindow = FALSE;
+}
+
+static void gl3dRedraw(GWindowObject *gh) {
+	ZBuffer *	zb;
+
+	zb = ((GGL3DObject *)gh)->glcxt->zb;
+	gdispGBlitArea(gh->display, gh->x, gh->y, zb->xsize, zb->ysize, 0, 0, zb->linesize/sizeof(color_t), (const pixel_t *)zb->pbuf);
+}
+
+static int gl3dResizeGLViewport(GLContext *c, int *xsize_ptr, int *ysize_ptr) {
+	int		cx, cy;
+
+	cx = *xsize_ptr;
+	cy = *ysize_ptr;
+
+	// We ensure that cx and cy are multiples of 4 for the zbuffer. TODO: find a better solution
+	cx &= ~3;
+	cy &= ~3;
+
+	if (cx <= 0 || cy <= 0)
+		return -1;
+
+	*xsize_ptr = cx;
+	*ysize_ptr = cy;
+
+	// Resize the GWIN???
+
+	// Resize the Z buffer
+	ZB_resize(c->zb, NULL, cx, cy);
+	return 0;
+}
+
+/**
+ * TinyGL support routines
+ */
+
+#include <string.h>
+
+#define NO_CLIBRARY
+
+void tgl_warning(const char *format, ...)	{ (void)format; }
+void tgl_trace(const char *format, ...)		{ (void)format; }
+void tgl_fixme(const char *format, ...)		{ (void)format; }
+void gl_fatal_error(char *format, ...)		{ gfxHalt(format); }
+void gl_assert(int test)					{ if (!test) gfxHalt("TinyGL Assert"); }
+
+void gl_free(void *p)						{ gfxFree(p); }
+void *gl_malloc(int size)					{ return gfxAlloc(size); }
+
+void *gl_zalloc(int size) {
+	void	*p;
+
+	p = gfxAlloc(size);
+	if (p)
+		memset(p, 0, size);
+    return p;
+}
+
+
+/**
+ * Pre-load TinyGL headers
+ */
+
+/**
+ * TinyGL wrapper code
+ */
+
+#include "3rdparty/tinygl-0.4-ugfx/src/api.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/list.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/vertex.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/init.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/matrix.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/texture.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/misc.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/clear.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/light.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/clip.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/select.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/get.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/zbuffer.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/zline.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/zdither.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/ztriangle.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/zmath.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/image_util.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/arrays.c"
+#include "3rdparty/tinygl-0.4-ugfx/src/specbuf.c"
+
+#endif /* GFX_USE_GWIN && GWIN_NEED_GL3D */