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-rw-r--r--src/mesa/drivers/x11/xm_surface.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/src/mesa/drivers/x11/xm_surface.c b/src/mesa/drivers/x11/xm_surface.c
new file mode 100644
index 00000000000..a3f2fe7d685
--- /dev/null
+++ b/src/mesa/drivers/x11/xm_surface.c
@@ -0,0 +1,251 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2007 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_surface.c
+ * Code to allow the softpipe code to write to X windows/buffers.
+ * This is a bit of a hack for now. We've basically got two different
+ * abstractions for color buffers: gl_renderbuffer and pipe_surface.
+ * They'll need to get merged someday...
+ * For now, they're separate things that point to each other.
+ */
+
+
+#include "glxheader.h"
+#include "GL/xmesa.h"
+#include "xmesaP.h"
+#include "context.h"
+#include "imports.h"
+#include "macros.h"
+#include "framebuffer.h"
+#include "renderbuffer.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_winsys.h"
+#include "softpipe/sp_context.h"
+#include "softpipe/sp_clear.h"
+#include "softpipe/sp_tile_cache.h"
+#include "softpipe/sp_surface.h"
+#include "state_tracker/st_context.h"
+
+
+#define CLIP_TILE \
+ do { \
+ if (x + w > ps->width) \
+ w = ps->width - x; \
+ if (y + h > ps->height) \
+ h = ps->height -y; \
+ } while(0)
+
+
+static INLINE struct xmesa_surface *
+xmesa_surface(struct pipe_surface *ps)
+{
+ return (struct xmesa_surface *) ps;
+}
+
+
+static INLINE struct xmesa_renderbuffer *
+xmesa_rb(struct pipe_surface *ps)
+{
+ struct xmesa_surface *xms = xmesa_surface(ps);
+ return xms->xrb;
+}
+
+
+#define FLIP(Y) Y = xrb->St.Base.Height - (Y) - 1;
+
+
+void
+xmesa_get_tile_rgba(struct pipe_context *pipe, struct pipe_surface *ps,
+ uint x, uint y, uint w, uint h, float *p)
+{
+ struct xmesa_surface *xms = xmesa_surface(ps);
+ struct xmesa_renderbuffer *xrb = xms->xrb;
+
+ if (xrb) {
+ /* this is a front/back color buffer */
+ GLubyte tmp[MAX_WIDTH * 4];
+ GLuint i, j;
+ uint w0 = w;
+ GET_CURRENT_CONTEXT(ctx);
+
+ CLIP_TILE;
+
+ FLIP(y);
+ for (i = 0; i < h; i++) {
+ xrb->St.Base.GetRow(ctx, &xrb->St.Base, w, x, y - i, tmp);
+ for (j = 0; j < w * 4; j++) {
+ p[j] = UBYTE_TO_FLOAT(tmp[j]);
+ }
+ p += w0 * 4;
+ }
+ }
+ else {
+ /* other softpipe surface */
+ softpipe_get_tile_rgba(ps, x, y, w, h, p);
+ }
+}
+
+
+void
+xmesa_put_tile_rgba(struct pipe_context *pipe, struct pipe_surface *ps,
+ uint x, uint y, uint w, uint h, const float *p)
+{
+ struct xmesa_surface *xms = xmesa_surface(ps);
+ struct xmesa_renderbuffer *xrb = xms->xrb;
+
+ if (xrb) {
+ /* this is a front/back color buffer */
+ GLubyte tmp[MAX_WIDTH * 4];
+ GLuint i, j;
+ uint w0 = w;
+ GET_CURRENT_CONTEXT(ctx);
+ CLIP_TILE;
+ FLIP(y);
+ for (i = 0; i < h; i++) {
+ for (j = 0; j < w * 4; j++) {
+ UNCLAMPED_FLOAT_TO_UBYTE(tmp[j], p[j]);
+ }
+ xrb->St.Base.PutRow(ctx, &xrb->St.Base, w, x, y - i, tmp, NULL);
+ p += w0 * 4;
+ }
+#if 0 /* debug: flush */
+ {
+ XMesaContext xm = XMESA_CONTEXT(ctx);
+ XSync(xm->display, 0);
+ }
+#endif
+ }
+ else {
+ /* other softpipe surface */
+ softpipe_put_tile_rgba(ps, x, y, w, h, p);
+ }
+}
+
+
+
+/**
+ * Called to create a pipe_surface for each X renderbuffer.
+ * Note: this is being used instead of pipe->surface_alloc() since we
+ * have special/unique quad read/write functions for X.
+ */
+struct pipe_surface *
+xmesa_new_color_surface(struct pipe_context *pipe, GLuint pipeFormat)
+{
+ struct xmesa_surface *xms = CALLOC_STRUCT(xmesa_surface);
+
+ assert(pipeFormat);
+
+ xms->surface.format = pipeFormat;
+ xms->surface.refcount = 1;
+
+ /* Note, the region we allocate doesn't actually have any storage
+ * since we're drawing into an XImage or Pixmap.
+ * The region's size will get set in the xmesa_alloc_front/back_storage()
+ * functions.
+ */
+ if (pipe)
+ xms->surface.region = pipe->winsys->region_alloc(pipe->winsys,
+ 1, 0, 0, 0x0);
+
+ return &xms->surface;
+}
+
+
+/**
+ * Called via pipe->surface_alloc() to create new surfaces (textures,
+ * renderbuffers, etc.
+ */
+struct pipe_surface *
+xmesa_surface_alloc(struct pipe_context *pipe, GLuint pipeFormat)
+{
+ struct xmesa_surface *xms = CALLOC_STRUCT(xmesa_surface);
+
+ assert(pipe);
+ assert(pipeFormat);
+
+ xms->surface.format = pipeFormat;
+ xms->surface.refcount = 1;
+
+ return &xms->surface;
+}
+
+
+boolean
+xmesa_is_format_supported(struct pipe_context *pipe, uint format)
+{
+ switch( format ) {
+ case PIPE_FORMAT_U_A8_R8_G8_B8:
+ case PIPE_FORMAT_S_R16_G16_B16_A16:
+ case PIPE_FORMAT_S8_Z24:
+ return TRUE;
+ };
+ return FALSE;
+}
+
+
+/**
+ * Called via pipe->clear()
+ */
+void
+xmesa_clear(struct pipe_context *pipe, struct pipe_surface *ps, GLuint value)
+{
+ struct xmesa_renderbuffer *xrb = xmesa_rb(ps);
+
+ /* XXX actually, we should just discard any cached tiles from this
+ * surface since we don't want to accidentally re-use them after clearing.
+ */
+ pipe->flush(pipe, 0);
+
+ {
+ struct softpipe_context *sp = softpipe_context(pipe);
+ if (ps == sp_tile_cache_get_surface(sp->cbuf_cache[0])) {
+ float clear[4];
+ clear[0] = 0.2; /* XXX hack */
+ clear[1] = 0.2;
+ clear[2] = 0.2;
+ clear[3] = 0.2;
+ sp_tile_cache_clear(sp->cbuf_cache[0], clear);
+ }
+ }
+
+ if (xrb && xrb->ximage) {
+ /* clearing back color buffer */
+ GET_CURRENT_CONTEXT(ctx);
+ xmesa_clear_buffers(ctx, BUFFER_BIT_BACK_LEFT);
+ }
+ else if (xrb && xrb->pixmap) {
+ /* clearing front color buffer */
+ GET_CURRENT_CONTEXT(ctx);
+ xmesa_clear_buffers(ctx, BUFFER_BIT_FRONT_LEFT);
+ }
+ else {
+ /* clearing other buffer */
+ softpipe_clear(pipe, ps, value);
+ }
+}
+
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