/**
* Update the framebuffer's _DepthBuffer field using the renderbuffer
* found at the given attachment index.
*
* If that attachment points to a combined GL_DEPTH_STENCIL renderbuffer,
* create and install a depth wrapper/adaptor.
*
* \param fb the framebuffer whose _DepthBuffer field to update
* \param attIndex indicates the renderbuffer to possibly wrap
*/
void
_mesa_update_depth_buffer(struct gl_context *ctx,
struct gl_framebuffer *fb,
GLuint attIndex)
{
struct gl_renderbuffer *depthRb;
/* only one possiblity for now */
ASSERT(attIndex == BUFFER_DEPTH);
depthRb = fb->Attachment[attIndex].Renderbuffer;
if (depthRb && _mesa_is_format_packed_depth_stencil(depthRb->Format)) {
/* The attached depth buffer is a GL_DEPTH_STENCIL renderbuffer */
if (!fb->_DepthBuffer
|| fb->_DepthBuffer->Wrapped != depthRb
|| _mesa_get_format_base_format(fb->_DepthBuffer->Format) != GL_DEPTH_COMPONENT) {
/* need to update wrapper */
struct gl_renderbuffer *wrapper
= _mesa_new_z24_renderbuffer_wrapper(ctx, depthRb);
_mesa_reference_renderbuffer(&fb->_DepthBuffer, wrapper);
ASSERT(fb->_DepthBuffer->Wrapped == depthRb);
}
}
else {
/* depthRb may be null */
_mesa_reference_renderbuffer(&fb->_DepthBuffer, depthRb);
}
}
/**
* Update the framebuffer's _StencilBuffer field using the renderbuffer
* found at the given attachment index.
*
* If that attachment points to a combined GL_DEPTH_STENCIL renderbuffer,
* create and install a stencil wrapper/adaptor.
*
* \param fb the framebuffer whose _StencilBuffer field to update
* \param attIndex indicates the renderbuffer to possibly wrap
*/
void
_mesa_update_stencil_buffer(struct gl_context *ctx,
struct gl_framebuffer *fb,
GLuint attIndex)
{
struct gl_renderbuffer *stencilRb;
ASSERT(attIndex == BUFFER_DEPTH ||
attIndex == BUFFER_STENCIL);
stencilRb = fb->Attachment[attIndex].Renderbuffer;
if (stencilRb && _mesa_is_format_packed_depth_stencil(stencilRb->Format)) {
/* The attached stencil buffer is a GL_DEPTH_STENCIL renderbuffer */
if (!fb->_StencilBuffer
|| fb->_StencilBuffer->Wrapped != stencilRb
|| _mesa_get_format_base_format(fb->_StencilBuffer->Format) != GL_STENCIL_INDEX) {
/* need to update wrapper */
struct gl_renderbuffer *wrapper
= _mesa_new_s8_renderbuffer_wrapper(ctx, stencilRb);
_mesa_reference_renderbuffer(&fb->_StencilBuffer, wrapper);
ASSERT(fb->_StencilBuffer->Wrapped == stencilRb);
}
}
else {
/* stencilRb may be null */
_mesa_reference_renderbuffer(&fb->_StencilBuffer, stencilRb);
}
}
void
brw_emit_depthbuffer(struct brw_context *brw)
{
struct intel_context *intel = &brw->intel;
struct gl_context *ctx = &intel->ctx;
struct gl_framebuffer *fb = ctx->DrawBuffer;
/* _NEW_BUFFERS */
struct intel_renderbuffer *depth_irb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
struct intel_renderbuffer *stencil_irb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
struct intel_mipmap_tree *depth_mt = brw->depthstencil.depth_mt;
struct intel_mipmap_tree *stencil_mt = brw->depthstencil.stencil_mt;
struct intel_mipmap_tree *hiz_mt = brw->depthstencil.hiz_mt;
uint32_t tile_x = brw->depthstencil.tile_x;
uint32_t tile_y = brw->depthstencil.tile_y;
bool separate_stencil = false;
uint32_t depth_surface_type = BRW_SURFACE_NULL;
uint32_t depthbuffer_format = BRW_DEPTHFORMAT_D32_FLOAT;
uint32_t depth_offset = 0;
uint32_t width = 1, height = 1;
if (stencil_mt) {
separate_stencil = stencil_mt->format == MESA_FORMAT_S8;
/* Gen7 supports only separate stencil */
assert(separate_stencil || intel->gen < 7);
}
/* If there's a packed depth/stencil bound to stencil only, we need to
* emit the packed depth/stencil buffer packet.
*/
if (!depth_irb && stencil_irb && !separate_stencil) {
depth_irb = stencil_irb;
depth_mt = stencil_mt;
}
if (depth_irb && depth_mt) {
struct intel_region *region = depth_mt->region;
/* When 3DSTATE_DEPTH_BUFFER.Separate_Stencil_Enable is set, then
* 3DSTATE_DEPTH_BUFFER.Surface_Format is not permitted to be a packed
* depthstencil format.
*
* Gens prior to 7 require that HiZ_Enable and Separate_Stencil_Enable be
* set to the same value. Gens after 7 implicitly always set
* Separate_Stencil_Enable; software cannot disable it.
*/
if ((intel->gen < 7 && depth_mt->hiz_mt) || intel->gen >= 7) {
assert(!_mesa_is_format_packed_depth_stencil(depth_mt->format));
}
/* Prior to Gen7, if using separate stencil, hiz must be enabled. */
assert(intel->gen >= 7 || !separate_stencil || hiz_mt);
assert(intel->gen < 6 || region->tiling == I915_TILING_Y);
assert(!hiz_mt || region->tiling == I915_TILING_Y);
depthbuffer_format = brw_depthbuffer_format(brw);
depth_surface_type = BRW_SURFACE_2D;
depth_offset = brw->depthstencil.depth_offset;
width = depth_irb->Base.Base.Width;
height = depth_irb->Base.Base.Height;
} else if (separate_stencil) {
/*
* There exists a separate stencil buffer but no depth buffer.
*
* The stencil buffer inherits most of its fields from
* 3DSTATE_DEPTH_BUFFER: namely the tile walk, surface type, width, and
* height.
*
* The tiled bit must be set. From the Sandybridge PRM, Volume 2, Part 1,
* Section 7.5.5.1.1 3DSTATE_DEPTH_BUFFER, Bit 1.27 Tiled Surface:
* [DevGT+]: This field must be set to TRUE.
*/
assert(intel->has_separate_stencil);
depth_surface_type = BRW_SURFACE_2D;
width = stencil_irb->Base.Base.Width;
height = stencil_irb->Base.Base.Height;
}
intel->vtbl.emit_depth_stencil_hiz(brw, depth_mt, depth_offset,
depthbuffer_format, depth_surface_type,
stencil_mt, hiz_mt, separate_stencil,
width, height, tile_x, tile_y);
}
/**
* Try to do a fast 1:1 blit with memcpy.
* \return GL_TRUE if successful, GL_FALSE otherwise.
*/
GLboolean
swrast_fast_copy_pixels(struct gl_context *ctx,
GLint srcX, GLint srcY, GLsizei width, GLsizei height,
GLint dstX, GLint dstY, GLenum type)
{
struct gl_framebuffer *srcFb = ctx->ReadBuffer;
struct gl_framebuffer *dstFb = ctx->DrawBuffer;
struct gl_renderbuffer *srcRb, *dstRb;
GLint row;
GLuint pixelBytes, widthInBytes;
GLubyte *srcMap, *dstMap;
GLint srcRowStride, dstRowStride;
if (type == GL_COLOR) {
if (dstFb->_NumColorDrawBuffers != 1)
return GL_FALSE;
srcRb = srcFb->_ColorReadBuffer;
dstRb = dstFb->_ColorDrawBuffers[0];
}
else if (type == GL_STENCIL) {
srcRb = srcFb->Attachment[BUFFER_STENCIL].Renderbuffer;
dstRb = dstFb->Attachment[BUFFER_STENCIL].Renderbuffer;
}
else if (type == GL_DEPTH) {
srcRb = srcFb->Attachment[BUFFER_DEPTH].Renderbuffer;
dstRb = dstFb->Attachment[BUFFER_DEPTH].Renderbuffer;
}
else {
ASSERT(type == GL_DEPTH_STENCIL_EXT);
/* XXX correct? */
srcRb = srcFb->Attachment[BUFFER_DEPTH].Renderbuffer;
dstRb = dstFb->Attachment[BUFFER_DEPTH].Renderbuffer;
}
/* src and dst renderbuffers must be same format */
if (!srcRb || !dstRb || srcRb->Format != dstRb->Format) {
return GL_FALSE;
}
if (type == GL_STENCIL || type == GL_DEPTH_COMPONENT) {
/* can't handle packed depth+stencil here */
if (_mesa_is_format_packed_depth_stencil(srcRb->Format) ||
_mesa_is_format_packed_depth_stencil(dstRb->Format))
return GL_FALSE;
}
else if (type == GL_DEPTH_STENCIL) {
/* can't handle separate depth/stencil buffers */
if (srcRb != srcFb->Attachment[BUFFER_STENCIL].Renderbuffer ||
dstRb != dstFb->Attachment[BUFFER_STENCIL].Renderbuffer)
return GL_FALSE;
}
/* clipping not supported */
if (srcX < 0 || srcX + width > (GLint) srcFb->Width ||
srcY < 0 || srcY + height > (GLint) srcFb->Height ||
dstX < dstFb->_Xmin || dstX + width > dstFb->_Xmax ||
dstY < dstFb->_Ymin || dstY + height > dstFb->_Ymax) {
return GL_FALSE;
}
pixelBytes = _mesa_get_format_bytes(srcRb->Format);
widthInBytes = width * pixelBytes;
if (srcRb == dstRb) {
/* map whole buffer for read/write */
/* XXX we could be clever and just map the union region of the
* source and dest rects.
*/
GLubyte *map;
GLint rowStride;
ctx->Driver.MapRenderbuffer(ctx, srcRb, 0, 0,
srcRb->Width, srcRb->Height,
GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
&map, &rowStride);
if (!map) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
return GL_TRUE; /* don't retry with slow path */
}
srcMap = map + srcY * rowStride + srcX * pixelBytes;
dstMap = map + dstY * rowStride + dstX * pixelBytes;
/* this handles overlapping copies */
if (srcY < dstY) {
/* copy in reverse (top->down) order */
srcMap += rowStride * (height - 1);
dstMap += rowStride * (height - 1);
srcRowStride = -rowStride;
dstRowStride = -rowStride;
}
else {
/* copy in normal (bottom->up) order */
srcRowStride = rowStride;
dstRowStride = rowStride;
}
}
else {
/* different src/dst buffers */
ctx->Driver.MapRenderbuffer(ctx, srcRb, srcX, srcY,
width, height,
GL_MAP_READ_BIT, &srcMap, &srcRowStride);
if (!srcMap) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
return GL_TRUE; /* don't retry with slow path */
}
ctx->Driver.MapRenderbuffer(ctx, dstRb, dstX, dstY,
width, height,
GL_MAP_WRITE_BIT, &dstMap, &dstRowStride);
if (!dstMap) {
ctx->Driver.UnmapRenderbuffer(ctx, srcRb);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
return GL_TRUE; /* don't retry with slow path */
}
}
for (row = 0; row < height; row++) {
/* memmove() in case of overlap */
memmove(dstMap, srcMap, widthInBytes);
dstMap += dstRowStride;
srcMap += srcRowStride;
}
ctx->Driver.UnmapRenderbuffer(ctx, srcRb);
if (dstRb != srcRb) {
ctx->Driver.UnmapRenderbuffer(ctx, dstRb);
}
return GL_TRUE;
}
