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/**************************************************************************
*
* Copyright © 2010 Jakob Bornecrantz
*
* 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*
**************************************************************************/
#include "i915_reg.h"
#include "i915_context.h"
#include "i915_state.h"
#include "i915_resource.h"
/***********************************************************************
* Update framebuffer state
*/
static unsigned translate_format(enum pipe_format format)
{
switch (format) {
case PIPE_FORMAT_B8G8R8A8_UNORM:
return COLOR_BUF_ARGB8888;
case PIPE_FORMAT_B5G6R5_UNORM:
return COLOR_BUF_RGB565;
default:
assert(0);
return 0;
}
}
static unsigned translate_depth_format(enum pipe_format zformat)
{
switch (zformat) {
case PIPE_FORMAT_Z24X8_UNORM:
case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
return DEPTH_FRMT_24_FIXED_8_OTHER;
case PIPE_FORMAT_Z16_UNORM:
return DEPTH_FRMT_16_FIXED;
default:
assert(0);
return 0;
}
}
static inline uint32_t
buf_3d_tiling_bits(enum i915_winsys_buffer_tile tiling)
{
uint32_t tiling_bits = 0;
switch (tiling) {
case I915_TILE_Y:
tiling_bits |= BUF_3D_TILE_WALK_Y;
case I915_TILE_X:
tiling_bits |= BUF_3D_TILED_SURFACE;
case I915_TILE_NONE:
break;
}
return tiling_bits;
}
/**
* Examine framebuffer state to determine width, height.
*/
static boolean
framebuffer_size(const struct pipe_framebuffer_state *fb,
uint *width, uint *height)
{
if (fb->cbufs[0]) {
*width = fb->cbufs[0]->width;
*height = fb->cbufs[0]->height;
return TRUE;
}
else if (fb->zsbuf) {
*width = fb->zsbuf->width;
*height = fb->zsbuf->height;
return TRUE;
}
else {
*width = *height = 0;
return FALSE;
}
}
static void update_framebuffer(struct i915_context *i915)
{
struct pipe_surface *cbuf_surface = i915->framebuffer.cbufs[0];
struct pipe_surface *depth_surface = i915->framebuffer.zsbuf;
unsigned cformat, zformat;
unsigned x, y, w, h;
int layer;
uint32_t draw_offset;
boolean ret;
if (cbuf_surface) {
struct i915_texture *tex = i915_texture(cbuf_surface->texture);
assert(tex);
i915->current.cbuf_bo = tex->buffer;
i915->current.cbuf_flags = BUF_3D_ID_COLOR_BACK |
BUF_3D_PITCH(tex->stride) | /* pitch in bytes */
buf_3d_tiling_bits(tex->tiling);
cformat = cbuf_surface->format;
layer = cbuf_surface->u.tex.first_layer;
x = tex->image_offset[cbuf_surface->u.tex.level][layer].nblocksx;
y = tex->image_offset[cbuf_surface->u.tex.level][layer].nblocksy;
} else {
i915->current.cbuf_bo = NULL;
cformat = PIPE_FORMAT_B8G8R8A8_UNORM; /* arbitrary */
x = y = 0;
}
cformat = translate_format(cformat);
/* What happens if no zbuf??
*/
if (depth_surface) {
struct i915_texture *tex = i915_texture(depth_surface->texture);
unsigned offset = i915_texture_offset(tex, depth_surface->u.tex.level,
depth_surface->u.tex.first_layer);
assert(tex);
assert(offset == 0);
i915->current.depth_bo = tex->buffer;
i915->current.depth_flags = BUF_3D_ID_DEPTH |
BUF_3D_PITCH(tex->stride) | /* pitch in bytes */
buf_3d_tiling_bits(tex->tiling);
zformat = translate_depth_format(depth_surface->format);
} else {
i915->current.depth_bo = NULL;
zformat = 0;
}
i915->current.dst_buf_vars = DSTORG_HORT_BIAS(0x8) | /* .5 */
DSTORG_VERT_BIAS(0x8) | /* .5 */
LOD_PRECLAMP_OGL |
TEX_DEFAULT_COLOR_OGL |
cformat |
zformat;
/* drawing rect calculations */
draw_offset = x | (y << 16);
ret = framebuffer_size(&i915->framebuffer, &w, &h);
assert(ret);
if (i915->current.draw_offset != draw_offset) {
i915->current.draw_offset = draw_offset;
/* XXX: only emit flush on change and not always in emit */
}
i915->current.draw_size = (w - 1 + x) | ((h - 1 + y) << 16);
i915->hardware_dirty |= I915_HW_STATIC;
/* flush the cache in case we sample from the old renderbuffers */
i915_set_flush_dirty(i915, I915_FLUSH_CACHE);
}
struct i915_tracked_state i915_hw_framebuffer = {
"framebuffer",
update_framebuffer,
I915_NEW_FRAMEBUFFER
};
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