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-rw-r--r--src/mesa/pipe/i915simple/i915_regions.c304
1 files changed, 304 insertions, 0 deletions
diff --git a/src/mesa/pipe/i915simple/i915_regions.c b/src/mesa/pipe/i915simple/i915_regions.c
new file mode 100644
index 00000000000..52181cf9f47
--- /dev/null
+++ b/src/mesa/pipe/i915simple/i915_regions.c
@@ -0,0 +1,304 @@
+/**************************************************************************
+ *
+ * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ *
+ **************************************************************************/
+
+/* Provide additional functionality on top of bufmgr buffers:
+ * - 2d semantics and blit operations (XXX: remove/simplify blits??)
+ * - refcounting of buffers for multiple images in a buffer.
+ * - refcounting of buffer mappings.
+ */
+
+#include "i915_context.h"
+#include "i915_winsys.h"
+#include "i915_blit.h"
+
+
+static void
+i915_region_idle(struct pipe_context *pipe, struct pipe_region *region)
+{
+
+}
+
+
+static GLubyte *
+i915_region_map(struct pipe_context *pipe, struct pipe_region *region)
+{
+ struct i915_context *i915 = i915_context( pipe );
+
+ if (!region->map_refcount++) {
+ region->map = i915->winsys->buffer_map( i915->winsys,
+ region->buffer );
+ }
+
+ return region->map;
+}
+
+static void
+i915_region_unmap(struct pipe_context *pipe, struct pipe_region *region)
+{
+ struct i915_context *i915 = i915_context( pipe );
+
+ if (!--region->map_refcount) {
+ i915->winsys->buffer_unmap( i915->winsys,
+ region->buffer );
+ region->map = NULL;
+ }
+}
+
+static struct pipe_region *
+i915_region_alloc(struct pipe_context *pipe,
+ GLuint cpp, GLuint width, GLuint height)
+{
+ struct i915_context *i915 = i915_context( pipe );
+ struct pipe_region *region = calloc(sizeof(*region), 1);
+
+ /* Choose a pitch to match hardware requirements - requires 64 byte
+ * alignment of render targets.
+ *
+ * XXX: is this ok for textures??
+ * clearly want to be able to render to textures under some
+ * circumstances, but maybe not always a requirement.
+ */
+ unsigned pitch = ((cpp * width + 63) & ~63) / cpp;
+
+ region->cpp = cpp;
+ region->pitch = pitch;
+ region->height = height; /* needed? */
+ region->refcount = 1;
+
+ region->buffer = i915->winsys->create_buffer( i915->winsys, 64 );
+
+ i915->winsys->buffer_data( i915->winsys,
+ region->buffer,
+ pitch * cpp * height,
+ NULL );
+
+ return region;
+}
+
+static void
+i915_region_release(struct pipe_context *pipe, struct pipe_region **region)
+{
+ struct i915_context *i915 = i915_context( pipe );
+
+ if (!*region)
+ return;
+
+ ASSERT((*region)->refcount > 0);
+ (*region)->refcount--;
+
+ if ((*region)->refcount == 0) {
+ assert((*region)->map_refcount == 0);
+
+ i915->winsys->buffer_unreference( i915->winsys,
+ (*region)->buffer );
+ free(*region);
+ }
+ *region = NULL;
+}
+
+
+/*
+ * XXX Move this into core Mesa?
+ */
+static void
+_mesa_copy_rect(GLubyte * dst,
+ GLuint cpp,
+ GLuint dst_pitch,
+ GLuint dst_x,
+ GLuint dst_y,
+ GLuint width,
+ GLuint height,
+ const GLubyte * src,
+ GLuint src_pitch,
+ GLuint src_x,
+ GLuint src_y)
+{
+ GLuint i;
+
+ dst_pitch *= cpp;
+ src_pitch *= cpp;
+ dst += dst_x * cpp;
+ src += src_x * cpp;
+ dst += dst_y * dst_pitch;
+ src += src_y * dst_pitch;
+ width *= cpp;
+
+ if (width == dst_pitch && width == src_pitch)
+ memcpy(dst, src, height * width);
+ else {
+ for (i = 0; i < height; i++) {
+ memcpy(dst, src, width);
+ dst += dst_pitch;
+ src += src_pitch;
+ }
+ }
+}
+
+
+/* Upload data to a rectangular sub-region. Lots of choices how to do this:
+ *
+ * - memcpy by span to current destination
+ * - upload data as new buffer and blit
+ *
+ * Currently always memcpy.
+ */
+static void
+i915_region_data(struct pipe_context *pipe,
+ struct pipe_region *dst,
+ GLuint dst_offset,
+ GLuint dstx, GLuint dsty,
+ const void *src, GLuint src_pitch,
+ GLuint srcx, GLuint srcy, GLuint width, GLuint height)
+{
+ _mesa_copy_rect(pipe->region_map(pipe, dst) + dst_offset,
+ dst->cpp,
+ dst->pitch,
+ dstx, dsty, width, height, src, src_pitch, srcx, srcy);
+
+ pipe->region_unmap(pipe, dst);
+}
+
+
+/* Assumes all values are within bounds -- no checking at this level -
+ * do it higher up if required.
+ */
+static void
+i915_region_copy(struct pipe_context *pipe,
+ struct pipe_region *dst,
+ GLuint dst_offset,
+ GLuint dstx, GLuint dsty,
+ struct pipe_region *src,
+ GLuint src_offset,
+ GLuint srcx, GLuint srcy, GLuint width, GLuint height)
+{
+ assert( dst != src );
+ assert( dst->cpp == src->cpp );
+
+ if (0) {
+ _mesa_copy_rect(pipe->region_map(pipe, dst) + dst_offset,
+ dst->cpp,
+ dst->pitch,
+ dstx, dsty,
+ width, height,
+ pipe->region_map(pipe, src) + src_offset,
+ src->pitch,
+ srcx, srcy);
+
+ pipe->region_unmap(pipe, src);
+ pipe->region_unmap(pipe, dst);
+ }
+ else {
+ i915_copy_blit( i915_context(pipe),
+ dst->cpp,
+ src->pitch, src->buffer, src_offset,
+ dst->pitch, dst->buffer, dst_offset,
+ srcx, srcy, dstx, dsty, width, height );
+ }
+}
+
+/* Fill a rectangular sub-region. Need better logic about when to
+ * push buffers into AGP - will currently do so whenever possible.
+ */
+static GLubyte *
+get_pointer(struct pipe_region *dst, GLuint x, GLuint y)
+{
+ return dst->map + (y * dst->pitch + x) * dst->cpp;
+}
+
+
+static void
+i915_region_fill(struct pipe_context *pipe,
+ struct pipe_region *dst,
+ GLuint dst_offset,
+ GLuint dstx, GLuint dsty,
+ GLuint width, GLuint height, GLuint value)
+{
+ if (0) {
+ GLuint i, j;
+
+ (void)pipe->region_map(pipe, dst);
+
+ switch (dst->cpp) {
+ case 1: {
+ GLubyte *row = get_pointer(dst, dstx, dsty);
+ for (i = 0; i < height; i++) {
+ memset(row, value, width);
+ row += dst->pitch;
+ }
+ }
+ break;
+ case 2: {
+ GLushort *row = (GLushort *) get_pointer(dst, dstx, dsty);
+ for (i = 0; i < height; i++) {
+ for (j = 0; j < width; j++)
+ row[j] = value;
+ row += dst->pitch;
+ }
+ }
+ break;
+ case 4: {
+ GLuint *row = (GLuint *) get_pointer(dst, dstx, dsty);
+ for (i = 0; i < height; i++) {
+ for (j = 0; j < width; j++)
+ row[j] = value;
+ row += dst->pitch;
+ }
+ }
+ break;
+ default:
+ assert(0);
+ break;
+ }
+ }
+ else {
+ i915_fill_blit( i915_context(pipe),
+ dst->cpp,
+ dst->pitch,
+ dst->buffer, dst_offset,
+ dstx, dsty,
+ width, height,
+ value );
+ }
+}
+
+
+
+
+
+void
+i915_init_region_functions(struct i915_context *i915)
+{
+ i915->pipe.region_idle = i915_region_idle;
+ i915->pipe.region_map = i915_region_map;
+ i915->pipe.region_unmap = i915_region_unmap;
+ i915->pipe.region_alloc = i915_region_alloc;
+ i915->pipe.region_release = i915_region_release;
+ i915->pipe.region_data = i915_region_data;
+ i915->pipe.region_copy = i915_region_copy;
+ i915->pipe.region_fill = i915_region_fill;
+}
+
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