[libpicofe.git] / gl_platform.c

#include <stdio.h>
#include <stdlib.h>
#include <EGL/egl.h>
#include <GLES/gl.h>

#include "gl.h"
#include "gl_platform.h"

#ifdef VCOS_VERSION

/*
 * hacks for Broadcom VideoCore / Raspberry Pi..
 * Why do I have to do this proprietary API stuff,
 * couldn't they implement EGL properly? D:
 */
#include <bcm_host.h>
#include <X11/Xlib.h>

static Display *x11display;
static Window x11window;
static DISPMANX_DISPLAY_HANDLE_T m_dispmanDisplay;
static EGL_DISPMANX_WINDOW_T m_nativeWindow;

static void get_window_rect(VC_RECT_T *rect)
{
	XWindowAttributes xattrs_root;
	uint32_t disp_w = 0, disp_h = 0;
	int dx = 0, dy = 0;
	unsigned int dw = 0, dh = 0, dummy;
	Window root, dummyw;

	graphics_get_display_size(0, &disp_w, &disp_h);
	if (disp_w == 0 || disp_h == 0)
		fprintf(stderr, "ERROR: graphics_get_display_size is broken\n");

	// default to fullscreen
	rect->x = rect->y = 0;
	rect->width = disp_w;
	rect->height = disp_h;

	if (x11display == NULL || x11window == 0)
		return; // use fullscreen

	XGetGeometry(x11display, x11window, &root, &dx, &dy, &dw, &dh,
		&dummy, &dummy);
	XGetWindowAttributes(x11display, root, &xattrs_root);

	if (dw == xattrs_root.width && dh == xattrs_root.height)
		return; // use fullscreen

	XTranslateCoordinates(x11display, x11window, root,
		dx, dy, &dx, &dy, &dummyw);

	// how to deal with that weird centering thing?
	// this is not quite right..
	dx += (disp_w - xattrs_root.width) / 2;
	dy += (disp_h - xattrs_root.height) / 2;

	rect->x = dx;
	rect->y = dy;
	rect->width = dw;
	rect->height = dh;
}

static void submit_rect(void)
{
	DISPMANX_UPDATE_HANDLE_T m_dispmanUpdate;
	DISPMANX_ELEMENT_HANDLE_T m_dispmanElement;
	VC_RECT_T srcRect = { 0, }; // unused, but we segfault without passing it??
	VC_RECT_T dstRect;

	get_window_rect(&dstRect);

	m_dispmanDisplay = vc_dispmanx_display_open(0);
	m_dispmanUpdate = vc_dispmanx_update_start(0);

	m_dispmanElement = vc_dispmanx_element_add(m_dispmanUpdate,
		m_dispmanDisplay, 0, &dstRect, 0, &srcRect,
		DISPMANX_PROTECTION_NONE, 0, 0, DISPMANX_NO_ROTATE);

	m_nativeWindow.element = m_dispmanElement;
	m_nativeWindow.width = dstRect.width;
	m_nativeWindow.height = dstRect.height;

	vc_dispmanx_update_submit_sync(m_dispmanUpdate);
}

int gl_platform_init(void **display, void **window, int *quirks)
{
	x11display = *display;
	x11window = (Window)*window;

	bcm_host_init();
	submit_rect();

	*display = EGL_DEFAULT_DISPLAY;
	*window = &m_nativeWindow;
	*quirks |= GL_QUIRK_ACTIVATE_RECREATE;

	return 0;
}

void gl_platform_finish(void)
{
	vc_dispmanx_display_close(m_dispmanDisplay);
	bcm_host_deinit();
}

#else

int gl_platform_init(void **display, void **window, int *quirks)
{
	return 0;
}

void gl_platform_finish(void)
{
}

#endif
Commit	Line	Data
0d645bc5	1	#include <stdio.h>
	2	#include <stdlib.h>
	3	#include <EGL/egl.h>
	4	#include <GLES/gl.h>
	5
	6	#include "gl.h"
	7	#include "gl_platform.h"
	8
	9	#ifdef VCOS_VERSION
	10
	11	/*
	12	* hacks for Broadcom VideoCore / Raspberry Pi..
	13	* Why do I have to do this proprietary API stuff,
	14	* couldn't they implement EGL properly? D:
	15	*/
	16	#include <bcm_host.h>
	17	#include <X11/Xlib.h>
	18
	19	static Display *x11display;
	20	static Window x11window;
	21	static DISPMANX_DISPLAY_HANDLE_T m_dispmanDisplay;
	22	static EGL_DISPMANX_WINDOW_T m_nativeWindow;
	23
	24	static void get_window_rect(VC_RECT_T *rect)
	25	{
	26	XWindowAttributes xattrs_root;
	27	uint32_t disp_w = 0, disp_h = 0;
	28	int dx = 0, dy = 0;
	29	unsigned int dw = 0, dh = 0, dummy;
	30	Window root, dummyw;
	31
	32	graphics_get_display_size(0, &disp_w, &disp_h);
	33	if (disp_w == 0 \|\| disp_h == 0)
	34	fprintf(stderr, "ERROR: graphics_get_display_size is broken\n");
	35
	36	// default to fullscreen
	37	rect->x = rect->y = 0;
	38	rect->width = disp_w;
	39	rect->height = disp_h;
	40
	41	if (x11display == NULL \|\| x11window == 0)
	42	return; // use fullscreen
	43
	44	XGetGeometry(x11display, x11window, &root, &dx, &dy, &dw, &dh,
	45	&dummy, &dummy);
	46	XGetWindowAttributes(x11display, root, &xattrs_root);
	47
	48	if (dw == xattrs_root.width && dh == xattrs_root.height)
	49	return; // use fullscreen
	50
	51	XTranslateCoordinates(x11display, x11window, root,
	52	dx, dy, &dx, &dy, &dummyw);
	53
	54	// how to deal with that weird centering thing?
	55	// this is not quite right..
	56	dx += (disp_w - xattrs_root.width) / 2;
	57	dy += (disp_h - xattrs_root.height) / 2;
	58
	59	rect->x = dx;
	60	rect->y = dy;
	61	rect->width = dw;
	62	rect->height = dh;
	63	}
	64
65	static void submit_rect(void)
66	{
67	DISPMANX_UPDATE_HANDLE_T m_dispmanUpdate;
68	DISPMANX_ELEMENT_HANDLE_T m_dispmanElement;
69	VC_RECT_T srcRect = { 0, }; // unused, but we segfault without passing it??
70	VC_RECT_T dstRect;
71
72	get_window_rect(&dstRect);
73
74	m_dispmanDisplay = vc_dispmanx_display_open(0);
75	m_dispmanUpdate = vc_dispmanx_update_start(0);
76
77	m_dispmanElement = vc_dispmanx_element_add(m_dispmanUpdate,
78	m_dispmanDisplay, 0, &dstRect, 0, &srcRect,
79	DISPMANX_PROTECTION_NONE, 0, 0, DISPMANX_NO_ROTATE);
80
81	m_nativeWindow.element = m_dispmanElement;
82	m_nativeWindow.width = dstRect.width;
83	m_nativeWindow.height = dstRect.height;
84
85	vc_dispmanx_update_submit_sync(m_dispmanUpdate);
86	}
87
88	int gl_platform_init(void display, void window, int *quirks)
89	{
90	x11display = *display;
91	x11window = (Window)*window;
92
93	bcm_host_init();
94	submit_rect();
95
96	*display = EGL_DEFAULT_DISPLAY;
97	*window = &m_nativeWindow;
98	*quirks \|= GL_QUIRK_ACTIVATE_RECREATE;
99
100	return 0;
101	}
102
103	void gl_platform_finish(void)
104	{
105	vc_dispmanx_display_close(m_dispmanDisplay);
106	bcm_host_deinit();
107	}
108
109	#else
110
111	int gl_platform_init(void display, void window, int *quirks)
112	{
113	return 0;
114	}
115
116	void gl_platform_finish(void)
117	{
118	}
119
120	#endif