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/**************************************************************************
*
* Copyright 2007 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.
*
**************************************************************************/
/**
* Surface-related functions for intel drivers.
* \author Brian Paul
*/
#include "glheader.h"
#include "main/macros.h"
#include "intel_screen.h"
#include "intel_context.h"
#include "intel_buffers.h"
#include "intel_surface.h"
#include "pipe/p_state.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "pipe/softpipe/sp_surface.h"
/**
* Note: the arithmetic/addressing in these functions is a little
* tricky since we need to invert the Y axis.
*/
static void
read_quad_f_swz(struct softpipe_surface *sps, GLint x, GLint y,
GLfloat (*rrrr)[QUAD_SIZE])
{
const GLint bytesPerRow = sps->surface.region->pitch * sps->surface.region->cpp;
const GLint invY = sps->surface.height - y - 1;
const GLubyte *src = sps->surface.region->map + invY * bytesPerRow + x * sps->surface.region->cpp;
GLfloat *dst = (GLfloat *) rrrr;
GLubyte temp[16];
GLuint j;
assert(sps->surface.format == PIPE_FORMAT_U_A8_R8_G8_B8);
assert(x < sps->surface.width - 1);
assert(y < sps->surface.height - 1);
memcpy(temp + 8, src, 8);
memcpy(temp + 0, src + bytesPerRow, 8);
for (j = 0; j < 4; j++) {
dst[0 * 4 + j] = UBYTE_TO_FLOAT(temp[j * 4 + 2]); /*R*/
dst[1 * 4 + j] = UBYTE_TO_FLOAT(temp[j * 4 + 1]); /*G*/
dst[2 * 4 + j] = UBYTE_TO_FLOAT(temp[j * 4 + 0]); /*B*/
dst[3 * 4 + j] = UBYTE_TO_FLOAT(temp[j * 4 + 3]); /*A*/
}
}
static void
write_quad_f_swz(struct softpipe_surface *sps, GLint x, GLint y,
GLfloat (*rrrr)[QUAD_SIZE])
{
const GLfloat *src = (const GLfloat *) rrrr;
const GLint bytesPerRow = sps->surface.region->pitch * sps->surface.region->cpp;
const GLint invY = sps->surface.height - y - 1;
GLubyte *dst = sps->surface.region->map + invY * bytesPerRow + x * sps->surface.region->cpp;
GLubyte temp[16];
GLuint j;
assert(sps->surface.format == PIPE_FORMAT_U_A8_R8_G8_B8);
for (j = 0; j < 4; j++) {
UNCLAMPED_FLOAT_TO_UBYTE(temp[j * 4 + 2], src[0 * 4 + j]); /*R*/
UNCLAMPED_FLOAT_TO_UBYTE(temp[j * 4 + 1], src[1 * 4 + j]); /*G*/
UNCLAMPED_FLOAT_TO_UBYTE(temp[j * 4 + 0], src[2 * 4 + j]); /*B*/
UNCLAMPED_FLOAT_TO_UBYTE(temp[j * 4 + 3], src[3 * 4 + j]); /*A*/
}
memcpy(dst, temp + 8, 8);
memcpy(dst + bytesPerRow, temp + 0, 8);
}
static void
read_quad_z24(struct softpipe_surface *sps,
GLint x, GLint y, GLuint zzzz[QUAD_SIZE])
{
static const GLuint mask = 0xffffff;
const GLint invY = sps->surface.height - y - 1;
const GLuint *src
= (GLuint *) (sps->surface.region->map
+ (invY * sps->surface.region->pitch + x) * sps->surface.region->cpp);
assert(sps->surface.format == PIPE_FORMAT_S8_Z24);
/* extract lower three bytes */
zzzz[0] = src[0] & mask;
zzzz[1] = src[1] & mask;
zzzz[2] = src[-sps->surface.region->pitch] & mask;
zzzz[3] = src[-sps->surface.region->pitch + 1] & mask;
}
static void
write_quad_z24(struct softpipe_surface *sps,
GLint x, GLint y, const GLuint zzzz[QUAD_SIZE])
{
static const GLuint mask = 0xff000000;
const GLint invY = sps->surface.height - y - 1;
GLuint *dst
= (GLuint *) (sps->surface.region->map
+ (invY * sps->surface.region->pitch + x) * sps->surface.region->cpp);
assert(sps->surface.format == PIPE_FORMAT_S8_Z24);
/* write lower three bytes */
dst[0] = (dst[0] & mask) | zzzz[0];
dst[1] = (dst[1] & mask) | zzzz[1];
dst -= sps->surface.region->pitch;
dst[0] = (dst[0] & mask) | zzzz[2];
dst[1] = (dst[1] & mask) | zzzz[3];
}
static void
read_quad_stencil(struct softpipe_surface *sps,
GLint x, GLint y, GLubyte ssss[QUAD_SIZE])
{
const GLint invY = sps->surface.height - y - 1;
const GLuint *src = (const GLuint *) (sps->surface.region->map
+ (invY * sps->surface.region->pitch + x) * sps->surface.region->cpp);
assert(sps->surface.format == PIPE_FORMAT_S8_Z24);
/* extract high byte */
ssss[0] = src[0] >> 24;
ssss[1] = src[1] >> 24;
src -= sps->surface.region->pitch;
ssss[2] = src[0] >> 24;
ssss[3] = src[1] >> 24;
}
static void
write_quad_stencil(struct softpipe_surface *sps,
GLint x, GLint y, const GLubyte ssss[QUAD_SIZE])
{
static const GLuint mask = 0x00ffffff;
const GLint invY = sps->surface.height - y - 1;
GLuint *dst = (GLuint *) (sps->surface.region->map
+ (invY * sps->surface.region->pitch + x) * sps->surface.region->cpp);
assert(sps->surface.format == PIPE_FORMAT_S8_Z24);
/* write high byte */
dst[0] = (dst[0] & mask) | (ssss[0] << 24);
dst[1] = (dst[1] & mask) | (ssss[1] << 24);
dst -= sps->surface.region->pitch;
dst[0] = (dst[0] & mask) | (ssss[2] << 24);
dst[1] = (dst[1] & mask) | (ssss[3] << 24);
}
static void
a8r8g8b8_get_tile(struct pipe_surface *ps,
GLuint x, GLuint y, GLuint w, GLuint h, GLfloat *p)
{
const GLuint *src
= ((const GLuint *) (ps->region->map + ps->offset))
+ y * ps->region->pitch + x;
GLuint i, j;
#if 0
assert(x + w <= ps->width);
assert(y + h <= ps->height);
#else
/* temp hack */
if (x + w > ps->width)
w = ps->width - x;
if (y + h > ps->height)
h = ps->height -y;
#endif
for (i = 0; i < h; i++) {
for (j = 0; j < w; j++) {
p[0] = UBYTE_TO_FLOAT((src[j] >> 16) & 0xff);
p[1] = UBYTE_TO_FLOAT((src[j] >> 8) & 0xff);
p[2] = UBYTE_TO_FLOAT((src[j] >> 0) & 0xff);
p[3] = UBYTE_TO_FLOAT((src[j] >> 24) & 0xff);
p += 4;
}
src += ps->region->pitch;
}
}
struct pipe_surface *
intel_new_surface(struct pipe_context *pipe, GLuint pipeFormat)
{
struct softpipe_surface *sps = CALLOC_STRUCT(softpipe_surface);
if (!sps)
return NULL;
sps->surface.width = 0; /* set in intel_alloc_renderbuffer_storage() */
sps->surface.height = 0;
sps->surface.refcount = 1;
sps->surface.format = pipeFormat;
switch (pipeFormat) {
case PIPE_FORMAT_U_A8_R8_G8_B8:
sps->read_quad_f_swz = read_quad_f_swz;
sps->write_quad_f_swz = write_quad_f_swz;
sps->surface.get_tile = a8r8g8b8_get_tile;
break;
case PIPE_FORMAT_U_R5_G6_B5:
break;
case PIPE_FORMAT_U_Z16:
break;
case PIPE_FORMAT_S8_Z24:
sps->read_quad_z = read_quad_z24;
sps->write_quad_z = write_quad_z24;
sps->read_quad_stencil = read_quad_stencil;
sps->write_quad_stencil = write_quad_stencil;
break;
}
return &sps->surface;
}
const GLuint *
intel_supported_formats(struct pipe_context *pipe, GLuint *numFormats)
{
static const GLuint formats[] = {
PIPE_FORMAT_U_A8_R8_G8_B8,
PIPE_FORMAT_U_R5_G6_B5,
PIPE_FORMAT_S8_Z24,
};
*numFormats = sizeof(formats) / sizeof(formats[0]);
return formats;
}
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