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Diffstat (limited to 'src/gallium/drivers/i965simple/brw_tex_layout.c')
-rw-r--r--src/gallium/drivers/i965simple/brw_tex_layout.c353
1 files changed, 353 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965simple/brw_tex_layout.c b/src/gallium/drivers/i965simple/brw_tex_layout.c
new file mode 100644
index 0000000000..90561f1307
--- /dev/null
+++ b/src/gallium/drivers/i965simple/brw_tex_layout.c
@@ -0,0 +1,353 @@
+/*
+ Copyright (C) Intel Corp. 2006. All Rights Reserved.
+ Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
+ develop this 3D driver.
+
+ 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 (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 NONINFRINGEMENT.
+ IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
+
+ **********************************************************************/
+ /*
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+
+/* Code to layout images in a mipmap tree for i965.
+ */
+
+#include "brw_tex_layout.h"
+
+#include "pipe/p_state.h"
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_util.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_winsys.h"
+
+#include "brw_context.h"
+
+#define FILE_DEBUG_FLAG DEBUG_TEXTURE
+
+#if 0
+unsigned intel_compressed_alignment(unsigned internalFormat)
+{
+ unsigned alignment = 4;
+
+ switch (internalFormat) {
+ case GL_COMPRESSED_RGB_FXT1_3DFX:
+ case GL_COMPRESSED_RGBA_FXT1_3DFX:
+ alignment = 8;
+ break;
+
+ default:
+ break;
+ }
+
+ return alignment;
+}
+#endif
+
+static unsigned minify( unsigned d )
+{
+ return MAX2(1, d>>1);
+}
+
+
+static boolean brw_miptree_layout(struct pipe_context *, struct brw_texture *);
+
+static void intel_miptree_set_image_offset(struct brw_texture *tex,
+ unsigned level,
+ unsigned img,
+ unsigned x, unsigned y)
+{
+ struct pipe_texture *pt = &tex->base;
+ if (img == 0 && level == 0)
+ assert(x == 0 && y == 0);
+ assert(img < tex->nr_images[level]);
+
+ tex->image_offset[level][img] = (x + y * tex->pitch) * pt->cpp;
+}
+
+static void intel_miptree_set_level_info(struct brw_texture *tex,
+ unsigned level,
+ unsigned nr_images,
+ unsigned x, unsigned y,
+ unsigned w, unsigned h, unsigned d)
+{
+ struct pipe_texture *pt = &tex->base;
+
+ assert(level < PIPE_MAX_TEXTURE_LEVELS);
+
+ pt->width[level] = w;
+ pt->height[level] = h;
+ pt->depth[level] = d;
+
+ tex->level_offset[level] = (x + y * tex->pitch) * pt->cpp;
+ tex->nr_images[level] = nr_images;
+
+ /*
+ DBG("%s level %d size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
+ level, w, h, d, x, y, tex->level_offset[level]);
+ */
+
+ /* Not sure when this would happen, but anyway:
+ */
+ if (tex->image_offset[level]) {
+ FREE(tex->image_offset[level]);
+ tex->image_offset[level] = NULL;
+ }
+
+ assert(nr_images);
+ assert(!tex->image_offset[level]);
+
+ tex->image_offset[level] = (unsigned *) MALLOC(nr_images * sizeof(unsigned));
+ tex->image_offset[level][0] = 0;
+}
+
+static void i945_miptree_layout_2d(struct brw_texture *tex)
+{
+ struct pipe_texture *pt = &tex->base;
+ unsigned align_h = 2, align_w = 4;
+ unsigned level;
+ unsigned x = 0;
+ unsigned y = 0;
+ unsigned width = pt->width[0];
+ unsigned height = pt->height[0];
+
+ tex->pitch = pt->width[0];
+
+#if 0
+ if (pt->compressed) {
+ align_w = intel_compressed_alignment(pt->internal_format);
+ tex->pitch = ALIGN(pt->width[0], align_w);
+ }
+#endif
+
+ /* May need to adjust pitch to accomodate the placement of
+ * the 2nd mipmap. This occurs when the alignment
+ * constraints of mipmap placement push the right edge of the
+ * 2nd mipmap out past the width of its parent.
+ */
+ if (pt->last_level > 0) {
+ unsigned mip1_width;
+
+ if (pt->compressed) {
+ mip1_width = align(minify(pt->width[0]), align_w)
+ + align(minify(minify(pt->width[0])), align_w);
+ } else {
+ mip1_width = align(minify(pt->width[0]), align_w)
+ + minify(minify(pt->width[0]));
+ }
+
+ if (mip1_width > tex->pitch) {
+ tex->pitch = mip1_width;
+ }
+ }
+
+ /* Pitch must be a whole number of dwords, even though we
+ * express it in texels.
+ */
+ tex->pitch = align(tex->pitch * pt->cpp, 4) / pt->cpp;
+ tex->total_height = 0;
+
+ for (level = 0; level <= pt->last_level; level++) {
+ unsigned img_height;
+
+ intel_miptree_set_level_info(tex, level, 1, x, y, width,
+ height, 1);
+
+ if (pt->compressed)
+ img_height = MAX2(1, height/4);
+ else
+ img_height = align(height, align_h);
+
+
+ /* Because the images are packed better, the final offset
+ * might not be the maximal one:
+ */
+ tex->total_height = MAX2(tex->total_height, y + img_height);
+
+ /* Layout_below: step right after second mipmap.
+ */
+ if (level == 1) {
+ x += align(width, align_w);
+ }
+ else {
+ y += img_height;
+ }
+
+ width = minify(width);
+ height = minify(height);
+ }
+}
+
+static boolean brw_miptree_layout(struct pipe_context *pipe, struct brw_texture *tex)
+{
+ struct pipe_texture *pt = &tex->base;
+ /* XXX: these vary depending on image format:
+ */
+/* int align_w = 4; */
+
+ switch (pt->target) {
+ case PIPE_TEXTURE_CUBE:
+ case PIPE_TEXTURE_3D: {
+ unsigned width = pt->width[0];
+ unsigned height = pt->height[0];
+ unsigned depth = pt->depth[0];
+ unsigned pack_x_pitch, pack_x_nr;
+ unsigned pack_y_pitch;
+ unsigned level;
+ unsigned align_h = 2;
+ unsigned align_w = 4;
+
+ tex->total_height = 0;
+#if 0
+ if (pt->compressed) {
+ align_w = intel_compressed_alignment(pt->internal_format);
+ pt->pitch = align(width, align_w);
+ pack_y_pitch = (height + 3) / 4;
+ } else
+#endif
+ {
+ tex->pitch = align(pt->width[0] * pt->cpp, 4) / pt->cpp;
+ pack_y_pitch = align(pt->height[0], align_h);
+ }
+
+ pack_x_pitch = tex->pitch;
+ pack_x_nr = 1;
+
+ for (level = 0; level <= pt->last_level; level++) {
+ unsigned nr_images = pt->target == PIPE_TEXTURE_3D ? depth : 6;
+ int x = 0;
+ int y = 0;
+ uint q, j;
+
+ intel_miptree_set_level_info(tex, level, nr_images,
+ 0, tex->total_height,
+ width, height, depth);
+
+ for (q = 0; q < nr_images;) {
+ for (j = 0; j < pack_x_nr && q < nr_images; j++, q++) {
+ intel_miptree_set_image_offset(tex, level, q, x, y);
+ x += pack_x_pitch;
+ }
+
+ x = 0;
+ y += pack_y_pitch;
+ }
+
+
+ tex->total_height += y;
+ width = minify(width);
+ height = minify(height);
+ depth = minify(depth);
+
+ if (pt->compressed) {
+ pack_y_pitch = (height + 3) / 4;
+
+ if (pack_x_pitch > align(width, align_w)) {
+ pack_x_pitch = align(width, align_w);
+ pack_x_nr <<= 1;
+ }
+ } else {
+ if (pack_x_pitch > 4) {
+ pack_x_pitch >>= 1;
+ pack_x_nr <<= 1;
+ assert(pack_x_pitch * pack_x_nr <= tex->pitch);
+ }
+
+ if (pack_y_pitch > 2) {
+ pack_y_pitch >>= 1;
+ pack_y_pitch = align(pack_y_pitch, align_h);
+ }
+ }
+
+ }
+ break;
+ }
+
+ default:
+ i945_miptree_layout_2d(tex);
+ break;
+ }
+#if 0
+ PRINT("%s: %dx%dx%d - sz 0x%x\n", __FUNCTION__,
+ pt->pitch,
+ pt->total_height,
+ pt->cpp,
+ pt->pitch * pt->total_height * pt->cpp );
+#endif
+
+ return TRUE;
+}
+
+
+struct pipe_texture *
+brw_texture_create(struct pipe_context *pipe, const struct pipe_texture *templat)
+{
+ struct brw_texture *tex = CALLOC_STRUCT(brw_texture);
+
+ if (tex) {
+ tex->base = *templat;
+
+ if (brw_miptree_layout(pipe, tex))
+ tex->buffer = pipe->winsys->buffer_create(pipe->winsys, 64,
+ PIPE_BUFFER_USAGE_PIXEL,
+ tex->pitch * tex->base.cpp *
+ tex->total_height);
+
+ if (!tex->buffer) {
+ FREE(tex);
+ return NULL;
+ }
+ }
+
+ return &tex->base;
+}
+
+void
+brw_texture_release(struct pipe_context *pipe, struct pipe_texture **pt)
+{
+ if (!*pt)
+ return;
+
+ /*
+ DBG("%s %p refcount will be %d\n",
+ __FUNCTION__, (void *) *pt, (*pt)->refcount - 1);
+ */
+ if (--(*pt)->refcount <= 0) {
+ struct brw_texture *tex = (struct brw_texture *)*pt;
+ uint i;
+
+ /*
+ DBG("%s deleting %p\n", __FUNCTION__, (void *) tex);
+ */
+
+ pipe_buffer_reference(pipe->winsys, &tex->buffer, NULL);
+
+ for (i = 0; i < PIPE_MAX_TEXTURE_LEVELS; i++)
+ if (tex->image_offset[i])
+ free(tex->image_offset[i]);
+
+ free(tex);
+ }
+ *pt = NULL;
+}
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