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|
/*
* Copyright 2000 Compaq Computer Inc. and VA Linux Systems, Inc.
* 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
* on 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
* VA LINUX SYSTEMS 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.
*/
/**
* \file mgapixel.c
* Implement framebuffer pixel operations for MGA.
*
* \todo
* Someday the accelerated \c glReadPixels and \c glDrawPixels paths need to
* be resurrected. They are currently ifdef'ed out because they don't seem
* to work and they only get activated some very rare circumstances.
*
* \author Keith Whitwell <keith@tungstengraphics.com>
* \author Gareth Hughes <gareth@valinux.com>
*/
#include "main/mtypes.h"
#include "main/macros.h"
#include "mgadd.h"
#include "mgacontext.h"
#include "mgaioctl.h"
#include "mgapixel.h"
#include "mgastate.h"
#include "swrast/swrast.h"
#include "main/imports.h"
#if 0
#define IS_AGP_MEM( mmesa, p ) \
((unsigned long)mmesa->mgaScreen->buffers.map <= ((unsigned long)p) && \
(unsigned long)mmesa->mgaScreen->buffers.map + \
(unsigned long)mmesa->mgaScreen->buffers.size > ((unsigned long)p))
#define AGP_OFFSET( mmesa, p ) \
(((unsigned long)p) - (unsigned long)mmesa->mgaScreen->buffers.map)
#if defined(MESA_packed_depth_stencil)
static GLboolean
check_depth_stencil_24_8( const GLcontext *ctx, GLenum type,
const struct gl_pixelstore_attrib *packing,
const void *pixels, GLint sz,
GLint pitch )
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
return ( type == GL_UNSIGNED_INT_24_8_MESA &&
ctx->Visual->DepthBits == 24 &&
ctx->Visual->StencilBits == 8 &&
mmesa->mgaScreen->cpp == 4 &&
mmesa->hw_stencil &&
!ctx->Pixel.IndexShift &&
!ctx->Pixel.IndexOffset &&
!ctx->Pixel.MapStencilFlag &&
ctx->Pixel.DepthBias == 0.0 &&
ctx->Pixel.DepthScale == 1.0 &&
!packing->SwapBytes &&
pitch % 32 == 0 &&
pitch < 4096 );
}
#endif
static GLboolean
check_depth( const GLcontext *ctx, GLenum type,
const struct gl_pixelstore_attrib *packing,
const void *pixels, GLint sz, GLint pitch )
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
if ( IS_AGP_MEM( mmesa, pixels ) &&
!( ( type == GL_UNSIGNED_INT && mmesa->mgaScreen->cpp == 4 ) ||
( type == GL_UNSIGNED_SHORT && mmesa->mgaScreen->cpp == 2 ) ) )
return GL_FALSE;
return ( ctx->Pixel.DepthBias == 0.0 &&
ctx->Pixel.DepthScale == 1.0 &&
!packing->SwapBytes &&
pitch % 32 == 0 &&
pitch < 4096 );
}
static GLboolean
check_color( const GLcontext *ctx, GLenum type, GLenum format,
const struct gl_pixelstore_attrib *packing,
const void *pixels, GLint sz, GLint pitch )
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
GLuint cpp = mmesa->mgaScreen->cpp;
/* Can't do conversions on agp reads/draws.
*/
if ( IS_AGP_MEM( mmesa, pixels ) &&
!( pitch % 32 == 0 && pitch < 4096 &&
( ( type == GL_UNSIGNED_BYTE &&
cpp == 4 && format == GL_BGRA ) ||
( type == GL_UNSIGNED_INT_8_8_8_8 &&
cpp == 4 && format == GL_BGRA ) ||
( type == GL_UNSIGNED_SHORT_5_6_5_REV &&
cpp == 2 && format == GL_RGB ) ) ) )
return GL_FALSE;
return (!ctx->_ImageTransferState &&
!packing->SwapBytes &&
!packing->LsbFirst);
}
static GLboolean
check_color_per_fragment_ops( const GLcontext *ctx )
{
return (!( ctx->Color.AlphaEnabled ||
ctx->Depth.Test ||
ctx->Fog.Enabled ||
ctx->Scissor.Enabled ||
ctx->Stencil._Enabled ||
!ctx->Color.ColorMask[0] ||
!ctx->Color.ColorMask[1] ||
!ctx->Color.ColorMask[2] ||
!ctx->Color.ColorMask[3] ||
ctx->Color.ColorLogicOpEnabled ||
ctx->Texture._EnabledUnits
) &&
ctx->Current.RasterPosValid &&
ctx->Pixel.ZoomX == 1.0F &&
(ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F));
}
static GLboolean
check_depth_per_fragment_ops( const GLcontext *ctx )
{
return ( ctx->Current.RasterPosValid &&
ctx->Color.ColorMask[RCOMP] == 0 &&
ctx->Color.ColorMask[BCOMP] == 0 &&
ctx->Color.ColorMask[GCOMP] == 0 &&
ctx->Color.ColorMask[ACOMP] == 0 &&
ctx->Pixel.ZoomX == 1.0F &&
( ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F ) );
}
/* In addition to the requirements for depth:
*/
#if defined(MESA_packed_depth_stencil)
static GLboolean
check_stencil_per_fragment_ops( const GLcontext *ctx )
{
return ( !ctx->Pixel.IndexShift &&
!ctx->Pixel.IndexOffset );
}
#endif
static GLboolean
clip_pixelrect( const GLcontext *ctx,
const GLframebuffer *buffer,
GLint *x, GLint *y,
GLsizei *width, GLsizei *height,
GLint *skipPixels, GLint *skipRows,
GLint *size )
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
*width = MIN2(*width, MAX_WIDTH); /* redundant? */
/* left clipping */
if (*x < buffer->_Xmin) {
*skipPixels += (buffer->_Xmin - *x);
*width -= (buffer->_Xmin - *x);
*x = buffer->_Xmin;
}
/* right clipping */
if (*x + *width > buffer->_Xmax)
*width -= (*x + *width - buffer->_Xmax - 1);
if (*width <= 0)
return GL_FALSE;
/* bottom clipping */
if (*y < buffer->_Ymin) {
*skipRows += (buffer->_Ymin - *y);
*height -= (buffer->_Ymin - *y);
*y = buffer->_Ymin;
}
/* top clipping */
if (*y + *height > buffer->_Ymax)
*height -= (*y + *height - buffer->_Ymax - 1);
if (*height <= 0)
return GL_FALSE;
*size = ((*y + *height - 1) * mmesa->mgaScreen->frontPitch +
(*x + *width - 1) * mmesa->mgaScreen->cpp);
return GL_TRUE;
}
static GLboolean
mgaTryReadPixels( GLcontext *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *pack,
GLvoid *pixels )
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
GLint size, skipPixels, skipRows;
GLint pitch = pack->RowLength ? pack->RowLength : width;
GLboolean ok;
GLuint planemask;
GLuint source;
#if 0
drmMGABlit blit;
GLuint dest;
GLint source_pitch, dest_pitch;
GLint delta_sx, delta_sy;
GLint delta_dx, delta_dy;
GLint blit_height, ydir;
#endif
if (!clip_pixelrect(ctx, ctx->ReadBuffer,
&x, &y, &width, &height,
&skipPixels, &skipRows, &size)) {
return GL_TRUE;
}
/* Only accelerate reading to agp buffers.
*/
if ( !IS_AGP_MEM(mmesa, (char *)pixels) ||
!IS_AGP_MEM(mmesa, (char *)pixels + size) )
return GL_FALSE;
switch (format) {
#if defined(MESA_packed_depth_stencil)
case GL_DEPTH_STENCIL_MESA:
ok = check_depth_stencil_24_8(ctx, type, pack, pixels, size, pitch);
planemask = ~0;
source = mmesa->mgaScreen->depthOffset;
break;
#endif
case GL_DEPTH_COMPONENT:
ok = check_depth(ctx, type, pack, pixels, size, pitch);
/* Can't accelerate at this depth -- planemask does the wrong
* thing; it doesn't clear the low order bits in the
* destination, instead it leaves them untouched.
*
* Could get the acclerator to solid fill the destination with
* zeros first... Or get the cpu to do it...
*/
if (ctx->Visual.depthBits == 24)
return GL_FALSE;
planemask = ~0;
source = mmesa->mgaScreen->depthOffset;
break;
case GL_RGB:
case GL_BGRA:
ok = check_color(ctx, type, format, pack, pixels, size, pitch);
planemask = ~0;
source = (mmesa->draw_buffer == MGA_FRONT ?
mmesa->mgaScreen->frontOffset :
mmesa->mgaScreen->backOffset);
break;
default:
return GL_FALSE;
}
if (!ok) {
return GL_FALSE;
}
LOCK_HARDWARE( mmesa );
#if 0
{
__DRIdrawablePrivate *dPriv = mmesa->driDrawable;
int nbox, retcode, i;
UPDATE_LOCK( mmesa, DRM_LOCK_FLUSH | DRM_LOCK_QUIESCENT );
if (mmesa->dirty_cliprects & MGA_FRONT)
mgaUpdateRects( mmesa, MGA_FRONT );
nbox = dPriv->numClipRects;
y = dPriv->h - y - height;
x += mmesa->drawX;
y += mmesa->drawY;
dest = ((mmesa->mgaScreen->agp.handle + AGP_OFFSET(mmesa, pixels)) |
DO_dstmap_sys | DO_dstacc_agp);
source_pitch = mmesa->mgaScreen->frontPitch / mmesa->mgaScreen->cpp;
dest_pitch = pitch;
delta_sx = 0;
delta_sy = 0;
delta_dx = -x;
delta_dy = -y;
blit_height = 2*y + height;
ydir = -1;
if (0) fprintf(stderr, "XX doing readpixel blit src_pitch %d dst_pitch %d\n",
source_pitch, dest_pitch);
for (i = 0 ; i < nbox ; )
{
int nr = MIN2(i + MGA_NR_SAREA_CLIPRECTS, dPriv->numClipRects);
drm_clip_rect_t *box = dPriv->pClipRects;
drm_clip_rect_t *b = mmesa->sarea->boxes;
int n = 0;
for ( ; i < nr ; i++) {
GLint bx = box[i].x1;
GLint by = box[i].y1;
GLint bw = box[i].x2 - bx;
GLint bh = box[i].y2 - by;
if (bx < x) bw -= x - bx, bx = x;
if (by < y) bh -= y - by, by = y;
if (bx + bw > x + width) bw = x + width - bx;
if (by + bh > y + height) bh = y + height - by;
if (bw <= 0) continue;
if (bh <= 0) continue;
b->x1 = bx;
b->y1 = by;
b->x2 = bx + bw;
b->y2 = by + bh;
b++;
n++;
}
mmesa->sarea->nbox = n;
if (n && (retcode = drmCommandWrite( mmesa->driFd, DRM_MGA_BLIT,
&blit, sizeof(drmMGABlit)))) {
fprintf(stderr, "blit ioctl failed, retcode = %d\n", retcode);
UNLOCK_HARDWARE( mmesa );
exit(1);
}
}
UPDATE_LOCK( mmesa, DRM_LOCK_FLUSH | DRM_LOCK_QUIESCENT );
}
#endif
UNLOCK_HARDWARE( mmesa );
return GL_TRUE;
}
static void
mgaDDReadPixels( GLcontext *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *pack,
GLvoid *pixels )
{
if (!mgaTryReadPixels( ctx, x, y, width, height, format, type, pack, pixels))
_swrast_ReadPixels( ctx, x, y, width, height, format, type, pack, pixels);
}
static void do_draw_pix( GLcontext *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLint pitch,
const void *pixels,
GLuint dest, GLuint planemask)
{
#if 0
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
drmMGABlit blit;
__DRIdrawablePrivate *dPriv = mmesa->driDrawable;
drm_clip_rect_t pbox = dPriv->pClipRects;
int nbox = dPriv->numClipRects;
int retcode, i;
y = dPriv->h - y - height;
x += mmesa->drawX;
y += mmesa->drawY;
blit.dest = dest;
blit.planemask = planemask;
blit.source = ((mmesa->mgaScreen->agp.handle + AGP_OFFSET(mmesa, pixels))
| SO_srcmap_sys | SO_srcacc_agp);
blit.dest_pitch = mmesa->mgaScreen->frontPitch / mmesa->mgaScreen->cpp;
blit.source_pitch = pitch;
blit.delta_sx = -x;
blit.delta_sy = -y;
blit.delta_dx = 0;
blit.delta_dy = 0;
if (ctx->Pixel.ZoomY == -1) {
blit.height = height;
blit.ydir = 1;
} else {
blit.height = height;
blit.ydir = -1;
}
if (0) fprintf(stderr,
"doing drawpixel blit src_pitch %d dst_pitch %d\n",
blit.source_pitch, blit.dest_pitch);
for (i = 0 ; i < nbox ; )
{
int nr = MIN2(i + MGA_NR_SAREA_CLIPRECTS, dPriv->numClipRects);
drm_clip_rect_t *box = mmesa->pClipRects;
drm_clip_rect_t *b = mmesa->sarea->boxes;
int n = 0;
for ( ; i < nr ; i++) {
GLint bx = box[i].x1;
GLint by = box[i].y1;
GLint bw = box[i].x2 - bx;
GLint bh = box[i].y2 - by;
if (bx < x) bw -= x - bx, bx = x;
if (by < y) bh -= y - by, by = y;
if (bx + bw > x + width) bw = x + width - bx;
if (by + bh > y + height) bh = y + height - by;
if (bw <= 0) continue;
if (bh <= 0) continue;
b->x1 = bx;
b->y1 = by;
b->x2 = bx + bw;
b->y2 = by + bh;
b++;
n++;
}
mmesa->sarea->nbox = n;
if (n && (retcode = drmCommandWrite( mmesa->driFd, DRM_MGA_BLIT,
&blit, sizeof(drmMGABlit)))) {
fprintf(stderr, "blit ioctl failed, retcode = %d\n", retcode);
UNLOCK_HARDWARE( mmesa );
exit(1);
}
}
#endif
}
static GLboolean
mgaTryDrawPixels( GLcontext *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
mgaContextPtr mmesa = MGA_CONTEXT(ctx);
GLint size, skipPixels, skipRows;
GLint pitch = unpack->RowLength ? unpack->RowLength : width;
GLuint dest, planemask;
GLuint cpp = mmesa->mgaScreen->cpp;
if (!clip_pixelrect(ctx, ctx->DrawBuffer,
&x, &y, &width, &height,
&skipPixels, &skipRows, &size)) {
return GL_TRUE;
}
switch (format) {
#if defined(MESA_packed_depth_stencil)
case GL_DEPTH_STENCIL_MESA:
dest = mmesa->mgaScreen->depthOffset;
planemask = ~0;
if (!check_depth_stencil_24_8(ctx, type, unpack, pixels, size, pitch) ||
!check_depth_per_fragment_ops(ctx) ||
!check_stencil_per_fragment_ops(ctx))
return GL_FALSE;
break;
#endif
case GL_DEPTH_COMPONENT:
dest = mmesa->mgaScreen->depthOffset;
if (ctx->Visual.depthBits == 24)
planemask = ~0xff;
else
planemask = ~0;
if (!check_depth(ctx, type, unpack, pixels, size, pitch) ||
!check_depth_per_fragment_ops(ctx))
return GL_FALSE;
break;
case GL_RGB:
case GL_BGRA:
dest = (mmesa->draw_buffer == MGA_FRONT ?
mmesa->mgaScreen->frontOffset :
mmesa->mgaScreen->backOffset);
planemask = mgaPackColor(cpp,
ctx->Color.ColorMask[RCOMP],
ctx->Color.ColorMask[GCOMP],
ctx->Color.ColorMask[BCOMP],
ctx->Color.ColorMask[ACOMP]);
if (cpp == 2)
planemask |= planemask << 16;
if (!check_color(ctx, type, format, unpack, pixels, size, pitch)) {
return GL_FALSE;
}
if (!check_color_per_fragment_ops(ctx)) {
return GL_FALSE;
}
break;
default:
return GL_FALSE;
}
LOCK_HARDWARE_QUIESCENT( mmesa );
if (mmesa->dirty_cliprects & MGA_FRONT)
mgaUpdateRects( mmesa, MGA_FRONT );
if ( IS_AGP_MEM(mmesa, (char *)pixels) &&
IS_AGP_MEM(mmesa, (char *)pixels + size) )
{
do_draw_pix( ctx, x, y, width, height, pitch, pixels,
dest, planemask );
UPDATE_LOCK( mmesa, DRM_LOCK_FLUSH | DRM_LOCK_QUIESCENT );
}
else
{
/* Pixels is in regular memory -- get dma buffers and perform
* upload through them.
*/
/* drmBufPtr buf = mgaGetBufferLocked(mmesa); */
GLuint bufferpitch = (width*cpp+31)&~31;
char *address = 0; /* mmesa->mgaScreen->agp.map; */
do {
/* GLuint rows = MIN2( height, MGA_DMA_BUF_SZ / bufferpitch ); */
GLuint rows = height;
if (0) fprintf(stderr, "trying to upload %d rows (pitch %d)\n",
rows, bufferpitch);
/* The texture conversion code is so slow that there is only
* negligble speedup when the buffers/images don't exactly
* match:
*/
#if 0
if (cpp == 2) {
if (!_mesa_convert_texsubimage2d( MESA_FORMAT_RGB565,
0, 0, width, rows,
bufferpitch, format, type,
unpack, pixels, address )) {
/* mgaReleaseBufLocked( mmesa, buf ); */
UNLOCK_HARDWARE(mmesa);
return GL_FALSE;
}
} else {
if (!_mesa_convert_texsubimage2d( MESA_FORMAT_ARGB8888,
0, 0, width, rows,
bufferpitch, format, type,
unpack, pixels, address )) {
/* mgaReleaseBufLocked( mmesa, buf ); */
UNLOCK_HARDWARE(mmesa);
return GL_FALSE;
}
}
#else
MEMCPY( address, pixels, rows*bufferpitch );
#endif
do_draw_pix( ctx, x, y, width, rows,
bufferpitch/cpp, address, dest, planemask );
/* Fix me -- use multiple buffers to avoid flush.
*/
UPDATE_LOCK( mmesa, DRM_LOCK_FLUSH | DRM_LOCK_QUIESCENT );
pixels = (void *)((char *) pixels + rows * pitch);
height -= rows;
y += rows;
} while (height);
/* mgaReleaseBufLocked( mmesa, buf ); */
}
UNLOCK_HARDWARE( mmesa );
mmesa->dirty |= MGA_UPLOAD_CLIPRECTS;
return GL_TRUE;
}
static void
mgaDDDrawPixels( GLcontext *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
if (!mgaTryDrawPixels( ctx, x, y, width, height, format, type,
unpack, pixels ))
_swrast_DrawPixels( ctx, x, y, width, height, format, type,
unpack, pixels );
}
#endif
/* Stub functions - not a real allocator, always returns pointer to
* the same block of agp space which isn't used for anything else at
* present.
*/
void mgaDDInitPixelFuncs( GLcontext *ctx )
{
#if 0
/* evidently, these functions don't always work */
if (getenv("MGA_BLIT_PIXELS")) {
ctx->Driver.ReadPixels = mgaDDReadPixels; /* requires agp dest */
ctx->Driver.DrawPixels = mgaDDDrawPixels; /* works with agp/normal mem */
}
#endif
}
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