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Diffstat (limited to 'src/mesa/pipe/xlib/xm_buffer.c')
-rw-r--r--src/mesa/pipe/xlib/xm_buffer.c503
1 files changed, 503 insertions, 0 deletions
diff --git a/src/mesa/pipe/xlib/xm_buffer.c b/src/mesa/pipe/xlib/xm_buffer.c
new file mode 100644
index 0000000000..09356c7329
--- /dev/null
+++ b/src/mesa/pipe/xlib/xm_buffer.c
@@ -0,0 +1,503 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * \file xm_buffer.h
+ * Framebuffer and renderbuffer-related functions.
+ */
+
+
+#include "glxheader.h"
+#include "GL/xmesa.h"
+#include "xmesaP.h"
+#include "imports.h"
+#include "framebuffer.h"
+#include "renderbuffer.h"
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_winsys.h"
+#include "state_tracker/st_context.h"
+
+
+#if defined(USE_XSHM) && !defined(XFree86Server)
+static volatile int mesaXErrorFlag = 0;
+
+/**
+ * Catches potential Xlib errors.
+ */
+static int
+mesaHandleXError(XMesaDisplay *dpy, XErrorEvent *event)
+{
+ (void) dpy;
+ (void) event;
+ mesaXErrorFlag = 1;
+ return 0;
+}
+
+/**
+ * Allocate a shared memory XImage back buffer for the given XMesaBuffer.
+ * Return: GL_TRUE if success, GL_FALSE if error
+ */
+static GLboolean
+alloc_back_shm_ximage(XMesaBuffer b, GLuint width, GLuint height)
+{
+ /*
+ * We have to do a _lot_ of error checking here to be sure we can
+ * really use the XSHM extension. It seems different servers trigger
+ * errors at different points if the extension won't work. Therefore
+ * we have to be very careful...
+ */
+ GC gc;
+ int (*old_handler)(XMesaDisplay *, XErrorEvent *);
+
+ if (width == 0 || height == 0) {
+ /* this will be true the first time we're called on 'b' */
+ return GL_FALSE;
+ }
+
+ b->backxrb->ximage = XShmCreateImage(b->xm_visual->display,
+ b->xm_visual->visinfo->visual,
+ b->xm_visual->visinfo->depth,
+ ZPixmap, NULL, &b->shminfo,
+ width, height);
+ if (b->backxrb->ximage == NULL) {
+ _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (XShmCreateImage), disabling.\n");
+ b->shm = 0;
+ return GL_FALSE;
+ }
+
+ b->shminfo.shmid = shmget(IPC_PRIVATE, b->backxrb->ximage->bytes_per_line
+ * b->backxrb->ximage->height, IPC_CREAT|0777);
+ if (b->shminfo.shmid < 0) {
+ _mesa_warning(NULL, "shmget failed while allocating back buffer.\n");
+ XDestroyImage(b->backxrb->ximage);
+ b->backxrb->ximage = NULL;
+ _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmget), disabling.\n");
+ b->shm = 0;
+ return GL_FALSE;
+ }
+
+ b->shminfo.shmaddr = b->backxrb->ximage->data
+ = (char*)shmat(b->shminfo.shmid, 0, 0);
+ if (b->shminfo.shmaddr == (char *) -1) {
+ _mesa_warning(NULL, "shmat() failed while allocating back buffer.\n");
+ XDestroyImage(b->backxrb->ximage);
+ shmctl(b->shminfo.shmid, IPC_RMID, 0);
+ b->backxrb->ximage = NULL;
+ _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmat), disabling.\n");
+ b->shm = 0;
+ return GL_FALSE;
+ }
+
+ b->shminfo.readOnly = False;
+ mesaXErrorFlag = 0;
+ old_handler = XSetErrorHandler(mesaHandleXError);
+ /* This may trigger the X protocol error we're ready to catch: */
+ XShmAttach(b->xm_visual->display, &b->shminfo);
+ XSync(b->xm_visual->display, False);
+
+ if (mesaXErrorFlag) {
+ /* we are on a remote display, this error is normal, don't print it */
+ XFlush(b->xm_visual->display);
+ mesaXErrorFlag = 0;
+ XDestroyImage(b->backxrb->ximage);
+ shmdt(b->shminfo.shmaddr);
+ shmctl(b->shminfo.shmid, IPC_RMID, 0);
+ b->backxrb->ximage = NULL;
+ b->shm = 0;
+ (void) XSetErrorHandler(old_handler);
+ return GL_FALSE;
+ }
+
+ shmctl(b->shminfo.shmid, IPC_RMID, 0); /* nobody else needs it */
+
+ /* Finally, try an XShmPutImage to be really sure the extension works */
+ gc = XCreateGC(b->xm_visual->display, b->frontxrb->drawable, 0, NULL);
+ XShmPutImage(b->xm_visual->display, b->frontxrb->drawable, gc,
+ b->backxrb->ximage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False);
+ XSync(b->xm_visual->display, False);
+ XFreeGC(b->xm_visual->display, gc);
+ (void) XSetErrorHandler(old_handler);
+ if (mesaXErrorFlag) {
+ XFlush(b->xm_visual->display);
+ mesaXErrorFlag = 0;
+ XDestroyImage(b->backxrb->ximage);
+ shmdt(b->shminfo.shmaddr);
+ shmctl(b->shminfo.shmid, IPC_RMID, 0);
+ b->backxrb->ximage = NULL;
+ b->shm = 0;
+ return GL_FALSE;
+ }
+
+ return GL_TRUE;
+}
+#else
+static GLboolean
+alloc_back_shm_ximage(XMesaBuffer b, GLuint width, GLuint height)
+{
+ /* Can't compile XSHM support */
+ return GL_FALSE;
+}
+#endif
+
+
+
+/**
+ * Setup an off-screen pixmap or Ximage to use as the back buffer.
+ * Input: b - the X/Mesa buffer
+ */
+static void
+alloc_back_buffer(XMesaBuffer b, GLuint width, GLuint height)
+{
+ if (b->db_mode == BACK_XIMAGE) {
+ /* Deallocate the old backxrb->ximage, if any */
+ if (b->backxrb->ximage) {
+#if defined(USE_XSHM) && !defined(XFree86Server)
+ if (b->shm) {
+ XShmDetach(b->xm_visual->display, &b->shminfo);
+ XDestroyImage(b->backxrb->ximage);
+ shmdt(b->shminfo.shmaddr);
+ }
+ else
+#endif
+ XMesaDestroyImage(b->backxrb->ximage);
+ b->backxrb->ximage = NULL;
+ }
+
+ if (width == 0 || height == 0)
+ return;
+
+ /* Allocate new back buffer */
+ if (b->shm == 0 || !alloc_back_shm_ximage(b, width, height)) {
+ /* Allocate a regular XImage for the back buffer. */
+#ifdef XFree86Server
+ b->backxrb->ximage = XMesaCreateImage(b->xm_visual->BitsPerPixel,
+ width, height, NULL);
+#else
+ b->backxrb->ximage = XCreateImage(b->xm_visual->display,
+ b->xm_visual->visinfo->visual,
+ GET_VISUAL_DEPTH(b->xm_visual),
+ ZPixmap, 0, /* format, offset */
+ NULL,
+ width, height,
+ 8, 0); /* pad, bytes_per_line */
+#endif
+ if (!b->backxrb->ximage) {
+ _mesa_warning(NULL, "alloc_back_buffer: XCreateImage failed.\n");
+ return;
+ }
+ b->backxrb->ximage->data = (char *) MALLOC(b->backxrb->ximage->height
+ * b->backxrb->ximage->bytes_per_line);
+ if (!b->backxrb->ximage->data) {
+ _mesa_warning(NULL, "alloc_back_buffer: MALLOC failed.\n");
+ XMesaDestroyImage(b->backxrb->ximage);
+ b->backxrb->ximage = NULL;
+ }
+ }
+ b->backxrb->pixmap = None;
+ }
+ else if (b->db_mode == BACK_PIXMAP) {
+ /* Free the old back pixmap */
+ if (b->backxrb->pixmap) {
+ XMesaFreePixmap(b->xm_visual->display, b->backxrb->pixmap);
+ b->backxrb->pixmap = 0;
+ }
+
+ if (width > 0 && height > 0) {
+ /* Allocate new back pixmap */
+ b->backxrb->pixmap = XMesaCreatePixmap(b->xm_visual->display,
+ b->frontxrb->drawable,
+ width, height,
+ GET_VISUAL_DEPTH(b->xm_visual));
+ }
+
+ b->backxrb->ximage = NULL;
+ }
+}
+
+
+static void
+xmesa_delete_renderbuffer(struct gl_renderbuffer *rb)
+{
+ /* XXX Note: the ximage or Pixmap attached to this renderbuffer
+ * should probably get freed here, but that's currently done in
+ * XMesaDestroyBuffer().
+ */
+ _mesa_free(rb);
+}
+
+
+static void
+finish_surface_init(GLcontext *ctx, struct xmesa_renderbuffer *xrb)
+{
+ struct pipe_context *pipe = ctx->st->pipe;
+ if (!xrb->St.surface->region) {
+ int w = 1, h = 1;
+ xrb->St.surface->region = pipe->winsys->region_alloc(pipe->winsys,
+ 1, w, h, 0x0);
+ }
+}
+
+
+/**
+ * Reallocate renderbuffer storage for front color buffer.
+ * Called via gl_renderbuffer::AllocStorage()
+ */
+static GLboolean
+xmesa_alloc_front_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLenum internalFormat, GLuint width, GLuint height)
+{
+ struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
+
+ /* just clear these to be sure we don't accidentally use them */
+ xrb->origin1 = NULL;
+ xrb->origin2 = NULL;
+ xrb->origin3 = NULL;
+ xrb->origin4 = NULL;
+
+ /* for the FLIP macro: */
+ xrb->bottom = height - 1;
+
+ rb->Width = width;
+ rb->Height = height;
+ rb->InternalFormat = internalFormat;
+
+ if (!xrb->St.surface || !xrb->St.surface->region)
+ finish_surface_init(ctx, xrb);
+
+ xrb->St.surface->width = width;
+ xrb->St.surface->height = height;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Reallocate renderbuffer storage for back color buffer.
+ * Called via gl_renderbuffer::AllocStorage()
+ */
+static GLboolean
+xmesa_alloc_back_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLenum internalFormat, GLuint width, GLuint height)
+{
+ struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
+
+ /* reallocate the back buffer XImage or Pixmap */
+ assert(xrb->Parent);
+ alloc_back_buffer(xrb->Parent, width, height);
+
+ /* same as front buffer */
+ /* XXX why is this here? */
+ (void) xmesa_alloc_front_storage(ctx, rb, internalFormat, width, height);
+
+ /* plus... */
+ if (xrb->ximage) {
+ /* Needed by PIXELADDR1 macro */
+ xrb->width1 = xrb->ximage->bytes_per_line;
+ xrb->origin1 = (GLubyte *) xrb->ximage->data + xrb->width1 * (height - 1);
+
+ /* Needed by PIXELADDR2 macro */
+ xrb->width2 = xrb->ximage->bytes_per_line / 2;
+ xrb->origin2 = (GLushort *) xrb->ximage->data + xrb->width2 * (height - 1);
+
+ /* Needed by PIXELADDR3 macro */
+ xrb->width3 = xrb->ximage->bytes_per_line;
+ xrb->origin3 = (GLubyte *) xrb->ximage->data + xrb->width3 * (height - 1);
+
+ /* Needed by PIXELADDR4 macro */
+ xrb->width4 = xrb->ximage->width;
+ xrb->origin4 = (GLuint *) xrb->ximage->data + xrb->width4 * (height - 1);
+ }
+ else {
+ /* out of memory or buffer size is 0 x 0 */
+ xrb->width1 = xrb->width2 = xrb->width3 = xrb->width4 = 0;
+ xrb->origin1 = NULL;
+ xrb->origin2 = NULL;
+ xrb->origin3 = NULL;
+ xrb->origin4 = NULL;
+ }
+
+ if (!xrb->St.surface || !xrb->St.surface->region)
+ finish_surface_init(ctx, xrb);
+
+ xrb->St.surface->width = width;
+ xrb->St.surface->height = height;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Called to create the front/back color renderbuffers, not user-created
+ * renderbuffers.
+ */
+struct xmesa_renderbuffer *
+xmesa_create_renderbuffer(GLcontext *ctx, GLuint name, const GLvisual *visual,
+ GLboolean backBuffer)
+{
+ struct xmesa_renderbuffer *xrb = CALLOC_STRUCT(xmesa_renderbuffer);
+ struct pipe_context *pipe = NULL;/*ctx->st->pipe;*/
+ if (xrb) {
+ GLuint name = 0;
+ GLuint pipeFormat = 0;
+ struct xmesa_surface *xms;
+
+ _mesa_init_renderbuffer(&xrb->St.Base, name);
+
+ xrb->St.Base.Delete = xmesa_delete_renderbuffer;
+ if (backBuffer)
+ xrb->St.Base.AllocStorage = xmesa_alloc_back_storage;
+ else
+ xrb->St.Base.AllocStorage = xmesa_alloc_front_storage;
+
+ if (visual->rgbMode) {
+ xrb->St.Base.InternalFormat = GL_RGBA;
+ xrb->St.Base._BaseFormat = GL_RGBA;
+ xrb->St.Base.DataType = GL_UNSIGNED_BYTE;
+ xrb->St.Base.RedBits = visual->redBits;
+ xrb->St.Base.GreenBits = visual->greenBits;
+ xrb->St.Base.BlueBits = visual->blueBits;
+ xrb->St.Base.AlphaBits = visual->alphaBits;
+ pipeFormat = PIPE_FORMAT_U_A8_R8_G8_B8;
+ }
+ else {
+ xrb->St.Base.InternalFormat = GL_COLOR_INDEX;
+ xrb->St.Base._BaseFormat = GL_COLOR_INDEX;
+ xrb->St.Base.DataType = GL_UNSIGNED_INT;
+ xrb->St.Base.IndexBits = visual->indexBits;
+ }
+ /* only need to set Red/Green/EtcBits fields for user-created RBs */
+
+ xrb->St.surface = xmesa_new_color_surface(pipe, pipeFormat);
+ xms = (struct xmesa_surface *) xrb->St.surface;
+ xms->xrb = xrb;
+ }
+ return xrb;
+}
+
+
+#if 0
+struct gl_renderbuffer *
+xmesa_new_renderbuffer(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLenum internalFormat, GLuint width, GLuint height)
+{
+ struct xmesa_renderbuffer *xrb = CALLOC_STRUCT(xmesa_renderbuffer);
+ if (xrb) {
+ GLuint name = 0;
+ _mesa_init_renderbuffer(&xrb->St.Base, name);
+
+ xrb->St.Base.Delete = xmesa_delete_renderbuffer;
+ if (backBuffer)
+ xrb->St.Base.AllocStorage = xmesa_alloc_back_storage;
+ else
+ xrb->St.Base.AllocStorage = xmesa_alloc_front_storage;
+
+ if (visual->rgbMode) {
+ xrb->St.Base.InternalFormat = GL_RGBA;
+ xrb->St.Base._BaseFormat = GL_RGBA;
+ xrb->St.Base.DataType = GL_UNSIGNED_BYTE;
+ xrb->St.Base.RedBits = visual->redBits;
+ xrb->St.Base.GreenBits = visual->greenBits;
+ xrb->St.Base.BlueBits = visual->blueBits;
+ xrb->St.Base.AlphaBits = visual->alphaBits;
+ }
+ else {
+ xrb->St.Base.InternalFormat = GL_COLOR_INDEX;
+ xrb->St.Base._BaseFormat = GL_COLOR_INDEX;
+ xrb->St.Base.DataType = GL_UNSIGNED_INT;
+ xrb->St.Base.IndexBits = visual->indexBits;
+ }
+ /* only need to set Red/Green/EtcBits fields for user-created RBs */
+ }
+ return xrb;
+}
+#endif
+
+
+/**
+ * Called via gl_framebuffer::Delete() method when this buffer
+ * is _really_ being deleted.
+ */
+void
+xmesa_delete_framebuffer(struct gl_framebuffer *fb)
+{
+ XMesaBuffer b = XMESA_BUFFER(fb);
+
+ if (b->num_alloced > 0) {
+ /* If no other buffer uses this X colormap then free the colors. */
+ if (!xmesa_find_buffer(b->display, b->cmap, b)) {
+#ifdef XFree86Server
+ int client = 0;
+ if (b->frontxrb->drawable)
+ client = CLIENT_ID(b->frontxrb->drawable->id);
+ (void)FreeColors(b->cmap, client,
+ b->num_alloced, b->alloced_colors, 0);
+#else
+ XFreeColors(b->display, b->cmap,
+ b->alloced_colors, b->num_alloced, 0);
+#endif
+ }
+ }
+
+ if (b->gc)
+ XMesaFreeGC(b->display, b->gc);
+ if (b->cleargc)
+ XMesaFreeGC(b->display, b->cleargc);
+ if (b->swapgc)
+ XMesaFreeGC(b->display, b->swapgc);
+
+ if (fb->Visual.doubleBufferMode) {
+ /* free back ximage/pixmap/shmregion */
+ if (b->backxrb->ximage) {
+#if defined(USE_XSHM) && !defined(XFree86Server)
+ if (b->shm) {
+ XShmDetach( b->display, &b->shminfo );
+ XDestroyImage( b->backxrb->ximage );
+ shmdt( b->shminfo.shmaddr );
+ }
+ else
+#endif
+ XMesaDestroyImage( b->backxrb->ximage );
+ b->backxrb->ximage = NULL;
+ }
+ if (b->backxrb->pixmap) {
+ XMesaFreePixmap( b->display, b->backxrb->pixmap );
+ if (b->xm_visual->hpcr_clear_flag) {
+ XMesaFreePixmap( b->display,
+ b->xm_visual->hpcr_clear_pixmap );
+ XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage );
+ }
+ }
+ }
+
+ if (b->rowimage) {
+ _mesa_free( b->rowimage->data );
+ b->rowimage->data = NULL;
+ XMesaDestroyImage( b->rowimage );
+ }
+
+ _mesa_free_framebuffer_data(fb);
+ _mesa_free(fb);
+}
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