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/**************************************************************************
*
* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
* Copyright 2011 Intel Corporation
* 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.
*
* Authors:
* Chad Versace <chad@chad-versace.us>
*
**************************************************************************/
#include <stdbool.h>
#include <stdint.h>
#include "main/glheader.h"
#include "main/macros.h"
#include "main/mtypes.h"
#include "main/colormac.h"
#include "main/renderbuffer.h"
#include "intel_buffers.h"
#include "intel_fbo.h"
#include "intel_mipmap_tree.h"
#include "intel_screen.h"
#include "intel_span.h"
#include "intel_regions.h"
#include "intel_tex.h"
#include "swrast/swrast.h"
#include "swrast/s_renderbuffer.h"
/**
* \brief Get pointer offset into stencil buffer.
*
* The stencil buffer is W tiled. Since the GTT is incapable of W fencing, we
* must decode the tile's layout in software.
*
* See
* - PRM, 2011 Sandy Bridge, Volume 1, Part 2, Section 4.5.2.1 W-Major Tile
* Format.
* - PRM, 2011 Sandy Bridge, Volume 1, Part 2, Section 4.5.3 Tiling Algorithm
*
* Even though the returned offset is always positive, the return type is
* signed due to
* commit e8b1c6d6f55f5be3bef25084fdd8b6127517e137
* mesa: Fix return type of _mesa_get_format_bytes() (#37351)
*/
intptr_t
intel_offset_S8(uint32_t stride, uint32_t x, uint32_t y, bool swizzled)
{
uint32_t tile_size = 4096;
uint32_t tile_width = 64;
uint32_t tile_height = 64;
uint32_t row_size = 64 * stride;
uint32_t tile_x = x / tile_width;
uint32_t tile_y = y / tile_height;
/* The byte's address relative to the tile's base addres. */
uint32_t byte_x = x % tile_width;
uint32_t byte_y = y % tile_height;
uintptr_t u = tile_y * row_size
+ tile_x * tile_size
+ 512 * (byte_x / 8)
+ 64 * (byte_y / 8)
+ 32 * ((byte_y / 4) % 2)
+ 16 * ((byte_x / 4) % 2)
+ 8 * ((byte_y / 2) % 2)
+ 4 * ((byte_x / 2) % 2)
+ 2 * (byte_y % 2)
+ 1 * (byte_x % 2);
if (swizzled) {
/* adjust for bit6 swizzling */
if (((byte_x / 8) % 2) == 1) {
if (((byte_y / 8) % 2) == 0) {
u += 64;
} else {
u -= 64;
}
}
}
return u;
}
/**
* Map the regions needed by intelSpanRenderStart().
*/
static void
intel_span_map_buffers(struct intel_context *intel)
{
struct gl_context *ctx = &intel->ctx;
struct intel_texture_object *tex_obj;
for (int i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
if (!ctx->Texture.Unit[i]._ReallyEnabled)
continue;
tex_obj = intel_texture_object(ctx->Texture.Unit[i]._Current);
intel_finalize_mipmap_tree(intel, i);
intel_tex_map_images(intel, tex_obj,
GL_MAP_READ_BIT | GL_MAP_WRITE_BIT);
}
_swrast_map_renderbuffers(ctx);
}
/**
* Prepare for software rendering. Map current read/draw framebuffers'
* renderbuffes and all currently bound texture objects.
*
* Old note: Moved locking out to get reasonable span performance.
*/
void
intelSpanRenderStart(struct gl_context * ctx)
{
struct intel_context *intel = intel_context(ctx);
intel_flush(ctx);
intel_prepare_render(intel);
intel_flush(ctx);
intel_span_map_buffers(intel);
}
/**
* Called when done software rendering. Unmap the buffers we mapped in
* the above function.
*/
void
intelSpanRenderFinish(struct gl_context * ctx)
{
struct intel_context *intel = intel_context(ctx);
GLuint i;
_swrast_flush(ctx);
for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
if (ctx->Texture.Unit[i]._ReallyEnabled) {
struct gl_texture_object *texObj = ctx->Texture.Unit[i]._Current;
intel_tex_unmap_images(intel, intel_texture_object(texObj));
}
}
_swrast_unmap_renderbuffers(ctx);
}
void
intelInitSpanFuncs(struct gl_context * ctx)
{
struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);
if (swdd) {
swdd->SpanRenderStart = intelSpanRenderStart;
swdd->SpanRenderFinish = intelSpanRenderFinish;
}
}
void
intel_map_vertex_shader_textures(struct gl_context *ctx)
{
struct intel_context *intel = intel_context(ctx);
int i;
if (ctx->VertexProgram._Current == NULL)
return;
for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
if (ctx->Texture.Unit[i]._ReallyEnabled &&
ctx->VertexProgram._Current->Base.TexturesUsed[i] != 0) {
struct gl_texture_object *texObj = ctx->Texture.Unit[i]._Current;
intel_tex_map_images(intel, intel_texture_object(texObj),
GL_MAP_READ_BIT | GL_MAP_WRITE_BIT);
}
}
}
void
intel_unmap_vertex_shader_textures(struct gl_context *ctx)
{
struct intel_context *intel = intel_context(ctx);
int i;
if (ctx->VertexProgram._Current == NULL)
return;
for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
if (ctx->Texture.Unit[i]._ReallyEnabled &&
ctx->VertexProgram._Current->Base.TexturesUsed[i] != 0) {
struct gl_texture_object *texObj = ctx->Texture.Unit[i]._Current;
intel_tex_unmap_images(intel, intel_texture_object(texObj));
}
}
}
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