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Diffstat (limited to 'src/egl/main/eglscreen.c')
| -rw-r--r-- | src/egl/main/eglscreen.c | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/src/egl/main/eglscreen.c b/src/egl/main/eglscreen.c new file mode 100644 index 000000000..e213e9a84 --- /dev/null +++ b/src/egl/main/eglscreen.c @@ -0,0 +1,334 @@ +/* + * Ideas for screen management extension to EGL. + * + * Each EGLDisplay has one or more screens (CRTs, Flat Panels, etc). + * The screens' handles can be obtained with eglGetScreensMESA(). + * + * A new kind of EGLSurface is possible- one which can be directly scanned + * out on a screen. Such a surface is created with eglCreateScreenSurface(). + * + * To actually display a screen surface on a screen, the eglShowSurface() + * function is called. + */ + +#include <assert.h> +#include <stdlib.h> +#include <string.h> + +#include "egldisplay.h" +#include "eglglobals.h" +#include "eglmode.h" +#include "eglconfig.h" +#include "eglsurface.h" +#include "eglscreen.h" + + +/** + * Initialize an _EGLScreen object to default values. + */ +void +_eglInitScreen(_EGLScreen *screen) +{ + /* just init to zero for now */ + memset(screen, 0, sizeof(_EGLScreen)); +} + + +/** + * Given a public screen handle, return the internal _EGLScreen object. + */ +_EGLScreen * +_eglLookupScreen(EGLDisplay dpy, EGLScreenMESA screen) +{ + EGLint i; + _EGLDisplay *display = _eglLookupDisplay(dpy); + + if (!display) + return NULL; + + for (i = 0; i < display->NumScreens; i++) { + if (display->Screens[i]->Handle == screen) + return display->Screens[i]; + } + return NULL; +} + + +/** + * Add the given _EGLScreen to the display's list of screens. + */ +void +_eglAddScreen(_EGLDisplay *display, _EGLScreen *screen) +{ + EGLint n; + + assert(display); + assert(screen); + + screen->Handle = _eglAllocScreenHandle(); + n = display->NumScreens; + display->Screens = realloc(display->Screens, (n+1) * sizeof(_EGLScreen *)); + display->Screens[n] = screen; + display->NumScreens++; +} + + + +EGLBoolean +_eglGetScreensMESA(_EGLDriver *drv, EGLDisplay dpy, EGLScreenMESA *screens, + EGLint max_screens, EGLint *num_screens) +{ + _EGLDisplay *display = _eglLookupDisplay(dpy); + EGLint n; + + if (!display) { + _eglError(EGL_BAD_DISPLAY, "eglGetScreensMESA"); + return EGL_FALSE; + } + + if (display->NumScreens > max_screens) { + n = max_screens; + } + else { + n = display->NumScreens; + } + + if (screens) { + EGLint i; + for (i = 0; i < n; i++) + screens[i] = display->Screens[i]->Handle; + } + if (num_screens) + *num_screens = n; + + return EGL_TRUE; +} + + +/** + * Initialize the given _EGLSurface object. Do error checking. + * Assign it an EGLSurface handle and insert into hash table. + * \return EGLSurface handle or EGL_NO_SURFACE if error. + */ +EGLSurface +_eglInitScreenSurface(_EGLSurface *surf, _EGLDriver *drv, EGLDisplay dpy, + EGLConfig config, const EGLint *attrib_list) +{ + EGLint width = 0, height = 0; + EGLint i; + + for (i = 0; attrib_list && attrib_list[i] != EGL_NONE; i++) { + switch (attrib_list[i]) { + case EGL_WIDTH: + width = attrib_list[++i]; + break; + case EGL_HEIGHT: + height = attrib_list[++i]; + break; + default: + _eglError(EGL_BAD_ATTRIBUTE, "eglCreateScreenSurfaceMESA"); + return EGL_NO_SURFACE; + } + } + + if (width <= 0 || height <= 0) { + _eglError(EGL_BAD_ATTRIBUTE, + "eglCreateScreenSurfaceMESA(width or height)"); + return EGL_NO_SURFACE; + } + + _eglInitSurface(surf); + surf->Width = width; + surf->Height = height; + surf->Type = EGL_SCREEN_BIT_MESA; + surf->Config = _eglLookupConfig(drv, dpy, config); + + /* insert into hash table */ + _eglSaveSurface(surf); + assert(surf->Handle); + + return surf->Handle; +} + + +/** + * Create a drawing surface which can be directly displayed on a screen. + */ +EGLSurface +_eglCreateScreenSurfaceMESA(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config, + const EGLint *attrib_list) +{ + _EGLSurface *surf; + EGLSurface surface; + + surf = (_EGLSurface *) malloc(sizeof(_EGLSurface)); + surface = _eglInitScreenSurface(surf, drv, dpy, config, attrib_list); + if (surface == EGL_NO_SURFACE) + free(surf); + + return surface; +} + + +/** + * Show the given surface on the named screen. + * If surface is EGL_NO_SURFACE, disable the screen's output. + * + * This is just a placeholder function; drivers will always override + * this with code that _really_ shows the surface. + */ +EGLBoolean +_eglShowSurfaceMESA(_EGLDriver *drv, EGLDisplay dpy, EGLScreenMESA screen, + EGLSurface surface, EGLModeMESA m) +{ + _EGLScreen *scrn = _eglLookupScreen(dpy, screen); + _EGLMode *mode = _eglLookupMode(dpy, m); + + if (!scrn) { + _eglError(EGL_BAD_SCREEN_MESA, "eglShowSurfaceMESA"); + return EGL_FALSE; + } + if (!mode && (m != EGL_NO_MODE_MESA )) { + _eglError(EGL_BAD_MODE_MESA, "eglShowSurfaceMESA"); + return EGL_FALSE; + } + + if (surface == EGL_NO_SURFACE) { + scrn->CurrentSurface = NULL; + } else { + _EGLSurface *surf = _eglLookupSurface(surface); + if (!surf || surf->Type != EGL_SCREEN_BIT_MESA) { + _eglError(EGL_BAD_SURFACE, "eglShowSurfaceMESA"); + return EGL_FALSE; + } + if (surf->Width < mode->Width || surf->Height < mode->Height) { + _eglError(EGL_BAD_SURFACE, + "eglShowSurfaceMESA(surface smaller than screen size)"); + return EGL_FALSE; + } + + scrn->CurrentSurface = surf; + scrn->CurrentMode = mode; + } + return EGL_TRUE; +} + + +/** + * Set a screen's current display mode. + * Note: mode = EGL_NO_MODE is valid (turns off the screen) + * + * This is just a placeholder function; drivers will always override + * this with code that _really_ sets the mode. + */ +EGLBoolean +_eglScreenModeMESA(_EGLDriver *drv, EGLDisplay dpy, EGLScreenMESA screen, + EGLModeMESA mode) +{ + _EGLScreen *scrn = _eglLookupScreen(dpy, screen); + + if (!scrn) { + _eglError(EGL_BAD_SCREEN_MESA, "eglScreenModeMESA"); + return EGL_FALSE; + } + + scrn->CurrentMode = _eglLookupMode(dpy, mode); + + return EGL_TRUE; +} + + +/** + * Set a screen's surface origin. + */ +EGLBoolean +_eglScreenPositionMESA(_EGLDriver *drv, EGLDisplay dpy, + EGLScreenMESA screen, EGLint x, EGLint y) +{ + _EGLScreen *scrn = _eglLookupScreen(dpy, screen); + if (!scrn) { + _eglError(EGL_BAD_SCREEN_MESA, "eglScreenPositionMESA"); + return EGL_FALSE; + } + + scrn->OriginX = x; + scrn->OriginY = y; + + return EGL_TRUE; +} + + +/** + * Query a screen's current surface. + */ +EGLBoolean +_eglQueryScreenSurfaceMESA(_EGLDriver *drv, EGLDisplay dpy, + EGLScreenMESA screen, EGLSurface *surface) +{ + const _EGLScreen *scrn = _eglLookupScreen(dpy, screen); + if (scrn->CurrentSurface) + *surface = scrn->CurrentSurface->Handle; + else + *surface = EGL_NO_SURFACE; + return EGL_TRUE; +} + + +/** + * Query a screen's current mode. + */ +EGLBoolean +_eglQueryScreenModeMESA(_EGLDriver *drv, EGLDisplay dpy, EGLScreenMESA screen, + EGLModeMESA *mode) +{ + const _EGLScreen *scrn = _eglLookupScreen(dpy, screen); + if (scrn->CurrentMode) + *mode = scrn->CurrentMode->Handle; + else + *mode = EGL_NO_MODE_MESA; + return EGL_TRUE; +} + + +EGLBoolean +_eglQueryScreenMESA(_EGLDriver *drv, EGLDisplay dpy, EGLScreenMESA screen, + EGLint attribute, EGLint *value) +{ + const _EGLScreen *scrn = _eglLookupScreen(dpy, screen); + + if (!scrn) { + _eglError(EGL_BAD_SCREEN_MESA, "eglQueryScreenMESA"); + return EGL_FALSE; + } + + switch (attribute) { + case EGL_SCREEN_POSITION_MESA: + value[0] = scrn->OriginX; + value[1] = scrn->OriginY; + break; + default: + _eglError(EGL_BAD_ATTRIBUTE, "eglQueryScreenMESA"); + return EGL_FALSE; + } + + return EGL_TRUE; +} + + +void +_eglDestroyScreenModes(_EGLScreen *scrn) +{ + free(scrn->Modes); +} + + +/** + * Default fallback routine - drivers should usually override this. + */ +void +_eglDestroyScreen(_EGLScreen *scrn) +{ + _eglDestroyScreenModes(scrn); + free(scrn); +} + |