/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2006 Brian Paul 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, 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 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.
*/
/**
* \file xm_dd.h
* General device driver functions for Xlib driver.
*/
#include "glxheader.h"
#include "main/bufferobj.h"
#include "main/context.h"
#include "main/colormac.h"
#include "main/fbobject.h"
#include "main/macros.h"
#include "main/mipmap.h"
#include "main/image.h"
#include "main/imports.h"
#include "main/mtypes.h"
#include "main/pbo.h"
#include "main/texformat.h"
#include "swrast/swrast.h"
#include "swrast/s_context.h"
#include "swrast_setup/swrast_setup.h"
#include "tnl/tnl.h"
#include "tnl/t_context.h"
#include "drivers/common/meta.h"
#include "xmesaP.h"
static void
finish_or_flush( struct gl_context *ctx )
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
if (xmesa) {
mtx_lock(&_xmesa_lock);
XSync( xmesa->display, False );
mtx_unlock(&_xmesa_lock);
}
}
/* Implements glColorMask() */
static void
color_mask(struct gl_context *ctx,
GLboolean rmask, GLboolean gmask, GLboolean bmask, GLboolean amask)
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaBuffer xmbuf;
const int xclass = xmesa->xm_visual->visualType;
(void) amask;
if (_mesa_is_user_fbo(ctx->DrawBuffer))
return;
xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
unsigned long m;
if (rmask && gmask && bmask) {
m = ((unsigned long)~0L);
}
else {
m = 0;
if (rmask) m |= GET_REDMASK(xmesa->xm_visual);
if (gmask) m |= GET_GREENMASK(xmesa->xm_visual);
if (bmask) m |= GET_BLUEMASK(xmesa->xm_visual);
}
XMesaSetPlaneMask( xmesa->display, xmbuf->cleargc, m );
}
}
/**********************************************************************/
/*** glClear implementations ***/
/**********************************************************************/
/**
* Clear the front or back color buffer, if it's implemented with a pixmap.
*/
static void
clear_pixmap(struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
GLint x, GLint y, GLint width, GLint height)
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
XMesaFillRectangle( xmesa->display, xrb->pixmap, xmbuf->cleargc,
x, xrb->Base.Base.Height - y - height,
width, height );
}
static void
clear_16bit_ximage( struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
GLint x, GLint y, GLint width, GLint height)
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
GLuint pixel = (GLuint) xmesa->clearpixel;
GLint i, j;
if (xmesa->swapbytes) {
pixel = ((pixel >> 8) & 0x00ff) | ((pixel << 8) & 0xff00);
}
for (j = 0; j < height; j++) {
GLushort *ptr2 = PIXEL_ADDR2(xrb, x, y + j);
for (i = 0; i < width; i++) {
ptr2[i] = pixel;
}
}
}
/* Optimized code provided by Nozomi Ytow <noz@xfree86.org> */
static void
clear_24bit_ximage(struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
GLint x, GLint y, GLint width, GLint height)
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
const GLubyte r = xmesa->clearcolor[0];
const GLubyte g = xmesa->clearcolor[1];
const GLubyte b = xmesa->clearcolor[2];
if (r == g && g == b) {
/* same value for all three components (gray) */
GLint j;
for (j = 0; j < height; j++) {
bgr_t *ptr3 = PIXEL_ADDR3(xrb, x, y + j);
}
}
else {
/* non-gray clear color */
GLint i, j;
for (j = 0; j < height; j++) {
bgr_t *ptr3 = PIXEL_ADDR3(xrb, x, y + j);
for (i = 0; i < width; i++) {
ptr3->r = r;
ptr3->g = g;
ptr3->b = b;
ptr3++;
}
}
}
}
static void
clear_32bit_ximage(struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
GLint x, GLint y, GLint width, GLint height)
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
register GLuint pixel = (GLuint) xmesa->clearpixel;
if (!xrb->ximage)
return;
if (xmesa->swapbytes) {
pixel = ((pixel >> 24) & 0x000000ff)
| ((pixel >> 8) & 0x0000ff00)
| ((pixel << 8) & 0x00ff0000)
| ((pixel << 24) & 0xff000000);
}
if (width == xrb->Base.Base.Width && height == xrb->Base.Base.Height) {
/* clearing whole buffer */
const GLuint n = xrb->Base.Base.Width * xrb->Base.Base.Height;
GLuint *ptr4 = (GLuint *) xrb->ximage->data;
if (pixel == 0) {
/* common case */
}
else {
GLuint i;
for (i = 0; i < n; i++)
ptr4[i] = pixel;
}
}
else {
/* clearing scissored region */
GLint i, j;
for (j = 0; j < height; j++) {
GLuint *ptr4 = PIXEL_ADDR4(xrb, x, y + j);
for (i = 0; i < width; i++) {
ptr4[i] = pixel;
}
}
}
}
static void
clear_nbit_ximage(struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
GLint x, GLint y, GLint width, GLint height)
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaImage *img = xrb->ximage;
GLint i, j;
/* TODO: optimize this */
y = YFLIP(xrb, y);
for (j = 0; j < height; j++) {
for (i = 0; i < width; i++) {
XMesaPutPixel(img, x+i, y-j, xmesa->clearpixel);
}
}
}
static void
clear_buffers(struct gl_context *ctx, GLbitfield buffers)
{
if (_mesa_is_winsys_fbo(ctx->DrawBuffer)) {
/* this is a window system framebuffer */
const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask[0];
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaBuffer b = XMESA_BUFFER(ctx->DrawBuffer);
const GLint x = ctx->DrawBuffer->_Xmin;
const GLint y = ctx->DrawBuffer->_Ymin;
const GLint width = ctx->DrawBuffer->_Xmax - x;
const GLint height = ctx->DrawBuffer->_Ymax - y;
_mesa_unclamped_float_rgba_to_ubyte(xmesa->clearcolor,
ctx->Color.ClearColor.f);
xmesa->clearpixel = xmesa_color_to_pixel(ctx,
xmesa->clearcolor[0],
xmesa->clearcolor[1],
xmesa->clearcolor[2],
xmesa->clearcolor[3],
xmesa->xm_visual->undithered_pf);
XMesaSetForeground(xmesa->display, b->cleargc, xmesa->clearpixel);
/* we can't handle color or index masking */
if (*colorMask == 0xffffffff && ctx->Color.IndexMask == 0xffffffff) {
if (buffers & BUFFER_BIT_FRONT_LEFT) {
/* clear front color buffer */
struct gl_renderbuffer *frontRb
= ctx->DrawBuffer->Attachment[BUFFER_FRONT_LEFT].Renderbuffer;
if (b->frontxrb == xmesa_renderbuffer(frontRb)) {
/* renderbuffer is not wrapped - great! */
b->frontxrb->clearFunc(ctx, b->frontxrb, x, y, width, height);
buffers &= ~BUFFER_BIT_FRONT_LEFT;
}
else {
/* we can't directly clear an alpha-wrapped color buffer */
}
}
if (buffers & BUFFER_BIT_BACK_LEFT) {
/* clear back color buffer */
struct gl_renderbuffer *backRb
= ctx->DrawBuffer->Attachment[BUFFER_BACK_LEFT].Renderbuffer;
if (b->backxrb == xmesa_renderbuffer(backRb)) {
/* renderbuffer is not wrapped - great! */
b->backxrb->clearFunc(ctx, b->backxrb, x, y, width, height);
buffers &= ~BUFFER_BIT_BACK_LEFT;
}
}
}
}
if (buffers)
_swrast_Clear(ctx, buffers);
}
/* XXX these functions haven't been tested in the Xserver environment */
/**
* Check if we can do an optimized glDrawPixels into an 8R8G8B visual.
*/
static GLboolean
can_do_DrawPixels_8R8G8B(struct gl_context *ctx, GLenum format, GLenum type)
{
if (format == GL_BGRA &&
type == GL_UNSIGNED_BYTE &&
ctx->DrawBuffer &&
_mesa_is_winsys_fbo(ctx->DrawBuffer) &&
ctx->Pixel.ZoomX == 1.0 && /* no zooming */
ctx->Pixel.ZoomY == 1.0 &&
ctx->_ImageTransferState == 0 /* no color tables, scale/bias, etc */) {
const SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (swrast->NewState)
_swrast_validate_derived( ctx );
if ((swrast->_RasterMask & ~CLIP_BIT) == 0) /* no blend, z-test, etc */ {
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
if (rb) {
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
if (xrb &&
xrb->pixmap && /* drawing to pixmap or window */
_mesa_get_format_bits(xrb->Base.Base.Format, GL_ALPHA_BITS) == 0) {
return GL_TRUE;
}
}
}
}
return GL_FALSE;
}
/**
* This function implements glDrawPixels() with an XPutImage call when
* drawing to the front buffer (X Window drawable).
* The image format must be GL_BGRA to match the PF_8R8G8B pixel format.
*/
static void
xmesa_DrawPixels_8R8G8B( struct gl_context *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
if (can_do_DrawPixels_8R8G8B(ctx, format, type)) {
const SWcontext *swrast = SWRAST_CONTEXT( ctx );
struct gl_pixelstore_attrib clippedUnpack = *unpack;
int dstX = x;
int dstY = y;
int w = width;
int h = height;
if (swrast->NewState)
_swrast_validate_derived( ctx );
if (_mesa_is_bufferobj(unpack->BufferObj)) {
/* unpack from PBO */
GLubyte *buf;
if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
format, type, INT_MAX, pixels)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glDrawPixels(invalid PBO access)");
return;
}
buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0,
unpack->BufferObj->Size,
GL_MAP_READ_BIT,
unpack->BufferObj,
MAP_INTERNAL);
if (!buf) {
return; /* error */
}
pixels = ADD_POINTERS(buf, pixels);
}
if (_mesa_clip_drawpixels(ctx, &dstX, &dstY, &w, &h, &clippedUnpack)) {
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
struct xmesa_renderbuffer *xrb
= xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
const int srcX = clippedUnpack.SkipPixels;
const int srcY = clippedUnpack.SkipRows;
const int rowLength = clippedUnpack.RowLength;
XMesaImage ximage;
assert(xmesa
->xm_visual
->dithered_pf
== PF_8R8G8B
); assert(xmesa
->xm_visual
->undithered_pf
== PF_8R8G8B
);
/* This is a little tricky since all coordinates up to now have
* been in the OpenGL bottom-to-top orientation. X is top-to-bottom
* so we have to carefully compute the Y coordinates/addresses here.
*/
memset(&ximage
, 0, sizeof(XMesaImage
)); ximage.width = width;
ximage.height = height;
ximage.format = ZPixmap;
ximage.data = (char *) pixels
+ ((srcY + h - 1) * rowLength + srcX) * 4;
ximage.byte_order = LSBFirst;
ximage.bitmap_unit = 32;
ximage.bitmap_bit_order = LSBFirst;
ximage.bitmap_pad = 32;
ximage.depth = 32;
ximage.bits_per_pixel = 32;
ximage.bytes_per_line = -rowLength * 4; /* negative to flip image */
/* it seems we don't need to set the ximage.red/green/blue_mask fields */
/* flip Y axis for dest position */
dstY = YFLIP(xrb, dstY) - h + 1;
XPutImage(dpy, xrb->pixmap, gc, &ximage, 0, 0, dstX, dstY, w, h);
}
if (_mesa_is_bufferobj(unpack->BufferObj)) {
ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL);
}
}
else {
/* software fallback */
_swrast_DrawPixels(ctx, x, y, width, height,
format, type, unpack, pixels);
}
}
/**
* Check if we can do an optimized glDrawPixels into an 5R6G5B visual.
*/
static GLboolean
can_do_DrawPixels_5R6G5B(struct gl_context *ctx, GLenum format, GLenum type)
{
if (format == GL_RGB &&
type == GL_UNSIGNED_SHORT_5_6_5 &&
!ctx->Color.DitherFlag && /* no dithering */
ctx->DrawBuffer &&
_mesa_is_winsys_fbo(ctx->DrawBuffer) &&
ctx->Pixel.ZoomX == 1.0 && /* no zooming */
ctx->Pixel.ZoomY == 1.0 &&
ctx->_ImageTransferState == 0 /* no color tables, scale/bias, etc */) {
const SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (swrast->NewState)
_swrast_validate_derived( ctx );
if ((swrast->_RasterMask & ~CLIP_BIT) == 0) /* no blend, z-test, etc */ {
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
if (rb) {
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
if (xrb &&
xrb->pixmap && /* drawing to pixmap or window */
_mesa_get_format_bits(xrb->Base.Base.Format, GL_ALPHA_BITS) == 0) {
return GL_TRUE;
}
}
}
}
return GL_FALSE;
}
/**
* This function implements glDrawPixels() with an XPutImage call when
* drawing to the front buffer (X Window drawable). The image format
* must be GL_RGB and image type must be GL_UNSIGNED_SHORT_5_6_5 to
* match the PF_5R6G5B pixel format.
*/
static void
xmesa_DrawPixels_5R6G5B( struct gl_context *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
if (can_do_DrawPixels_5R6G5B(ctx, format, type)) {
const SWcontext *swrast = SWRAST_CONTEXT( ctx );
struct gl_pixelstore_attrib clippedUnpack = *unpack;
int dstX = x;
int dstY = y;
int w = width;
int h = height;
if (swrast->NewState)
_swrast_validate_derived( ctx );
if (_mesa_is_bufferobj(unpack->BufferObj)) {
/* unpack from PBO */
GLubyte *buf;
if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
format, type, INT_MAX, pixels)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glDrawPixels(invalid PBO access)");
return;
}
buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0,
unpack->BufferObj->Size,
GL_MAP_READ_BIT,
unpack->BufferObj,
MAP_INTERNAL);
if (!buf) {
return; /* error */
}
pixels = ADD_POINTERS(buf, pixels);
}
if (_mesa_clip_drawpixels(ctx, &dstX, &dstY, &w, &h, &clippedUnpack)) {
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
struct xmesa_renderbuffer *xrb
= xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
const int srcX = clippedUnpack.SkipPixels;
const int srcY = clippedUnpack.SkipRows;
const int rowLength = clippedUnpack.RowLength;
XMesaImage ximage;
assert(xmesa
->xm_visual
->undithered_pf
== PF_5R6G5B
);
/* This is a little tricky since all coordinates up to now have
* been in the OpenGL bottom-to-top orientation. X is top-to-bottom
* so we have to carefully compute the Y coordinates/addresses here.
*/
memset(&ximage
, 0, sizeof(XMesaImage
)); ximage.width = width;
ximage.height = height;
ximage.format = ZPixmap;
ximage.data = (char *) pixels
+ ((srcY + h - 1) * rowLength + srcX) * 2;
ximage.byte_order = LSBFirst;
ximage.bitmap_unit = 16;
ximage.bitmap_bit_order = LSBFirst;
ximage.bitmap_pad = 16;
ximage.depth = 16;
ximage.bits_per_pixel = 16;
ximage.bytes_per_line = -rowLength * 2; /* negative to flip image */
/* it seems we don't need to set the ximage.red/green/blue_mask fields */
/* flip Y axis for dest position */
dstY = YFLIP(xrb, dstY) - h + 1;
XPutImage(dpy, xrb->pixmap, gc, &ximage, 0, 0, dstX, dstY, w, h);
}
if (unpack->BufferObj->Name) {
ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL);
}
}
else {
/* software fallback */
_swrast_DrawPixels(ctx, x, y, width, height,
format, type, unpack, pixels);
}
}
/**
* Determine if we can do an optimized glCopyPixels.
*/
static GLboolean
can_do_CopyPixels(struct gl_context *ctx, GLenum type)
{
if (type == GL_COLOR &&
ctx->_ImageTransferState == 0 && /* no color tables, scale/bias, etc */
ctx->Pixel.ZoomX == 1.0 && /* no zooming */
ctx->Pixel.ZoomY == 1.0 &&
ctx->Color.DrawBuffer[0] == GL_FRONT && /* copy to front buf */
ctx->Pixel.ReadBuffer == GL_FRONT && /* copy from front buf */
ctx->ReadBuffer->_ColorReadBuffer &&
ctx->DrawBuffer->_ColorDrawBuffers[0]) {
const SWcontext *swrast = SWRAST_CONTEXT( ctx );
if (swrast->NewState)
_swrast_validate_derived( ctx );
if ((swrast->_RasterMask & ~CLIP_BIT) == 0x0 &&
ctx->ReadBuffer &&
ctx->ReadBuffer->_ColorReadBuffer &&
ctx->DrawBuffer &&
ctx->DrawBuffer->_ColorDrawBuffers[0]) {
struct xmesa_renderbuffer *srcXrb
= xmesa_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
struct xmesa_renderbuffer *dstXrb
= xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
if (srcXrb->pixmap && dstXrb->pixmap) {
return GL_TRUE;
}
}
}
return GL_FALSE;
}
/**
* Implement glCopyPixels for the front color buffer (or back buffer Pixmap)
* for the color buffer. Don't support zooming, pixel transfer, etc.
* We do support copying from one window to another, ala glXMakeCurrentRead.
*/
static void
xmesa_CopyPixels( struct gl_context *ctx,
GLint srcx, GLint srcy, GLsizei width, GLsizei height,
GLint destx, GLint desty, GLenum type )
{
if (can_do_CopyPixels(ctx, type)) {
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
struct xmesa_renderbuffer *srcXrb
= xmesa_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
struct xmesa_renderbuffer *dstXrb
= xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
/* Note: we don't do any special clipping work here. We could,
* but X will do it for us.
*/
srcy = YFLIP(srcXrb, srcy) - height + 1;
desty = YFLIP(dstXrb, desty) - height + 1;
XCopyArea(dpy, srcXrb->pixmap, dstXrb->pixmap, gc,
srcx, srcy, width, height, destx, desty);
}
else {
_swrast_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type );
}
}
/*
* Every driver should implement a GetString function in order to
* return a meaningful GL_RENDERER string.
*/
static const GLubyte *
get_string( struct gl_context *ctx, GLenum name )
{
(void) ctx;
switch (name) {
case GL_RENDERER:
return (const GLubyte *) "Mesa X11";
case GL_VENDOR:
return NULL;
default:
return NULL;
}
}
/*
* We implement the glEnable function only because we care about
* dither enable/disable.
*/
static void
enable( struct gl_context *ctx, GLenum pname, GLboolean state )
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
switch (pname) {
case GL_DITHER:
if (state)
xmesa->pixelformat = xmesa->xm_visual->dithered_pf;
else
xmesa->pixelformat = xmesa->xm_visual->undithered_pf;
break;
default:
; /* silence compiler warning */
}
}
/**
* Called when the driver should update its state, based on the new_state
* flags.
*/
void
xmesa_update_state( struct gl_context *ctx, GLbitfield new_state )
{
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
/* Propagate statechange information to swrast and swrast_setup
* modules. The X11 driver has no internal GL-dependent state.
*/
_swrast_InvalidateState( ctx, new_state );
_tnl_InvalidateState( ctx, new_state );
_vbo_InvalidateState( ctx, new_state );
_swsetup_InvalidateState( ctx, new_state );
if (_mesa_is_user_fbo(ctx->DrawBuffer))
return;
/*
* GL_DITHER, GL_READ/DRAW_BUFFER, buffer binding state, etc. effect
* renderbuffer span/clear funcs.
* Check _NEW_COLOR to detect dither enable/disable.
*/
if (new_state & (_NEW_COLOR | _NEW_BUFFERS)) {
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
struct xmesa_renderbuffer *front_xrb, *back_xrb;
front_xrb = xmbuf->frontxrb;
if (front_xrb) {
front_xrb->clearFunc = clear_pixmap;
}
back_xrb = xmbuf->backxrb;
if (back_xrb) {
if (xmbuf->backxrb->pixmap) {
back_xrb->clearFunc = clear_pixmap;
}
else {
switch (xmesa->xm_visual->BitsPerPixel) {
case 16:
back_xrb->clearFunc = clear_16bit_ximage;
break;
case 24:
back_xrb->clearFunc = clear_24bit_ximage;
break;
case 32:
back_xrb->clearFunc = clear_32bit_ximage;
break;
default:
back_xrb->clearFunc = clear_nbit_ximage;
break;
}
}
}
}
}
/**
* Called by glViewport.
* This is a good time for us to poll the current X window size and adjust
* our renderbuffers to match the current window size.
* Remember, we have no opportunity to respond to conventional
* X Resize/StructureNotify events since the X driver has no event loop.
* Thus, we poll.
* Note that this trick isn't fool-proof. If the application never calls
* glViewport, our notion of the current window size may be incorrect.
* That problem led to the GLX_MESA_resize_buffers extension.
*/
static void
xmesa_viewport(struct gl_context *ctx)
{
XMesaContext xmctx = XMESA_CONTEXT(ctx);
XMesaBuffer xmdrawbuf = XMESA_BUFFER(ctx->WinSysDrawBuffer);
XMesaBuffer xmreadbuf = XMESA_BUFFER(ctx->WinSysReadBuffer);
xmesa_check_and_update_buffer_size(xmctx, xmdrawbuf);
xmesa_check_and_update_buffer_size(xmctx, xmreadbuf);
}
#if ENABLE_EXT_timer_query
/*
* The GL_EXT_timer_query extension is not enabled for the XServer
* indirect renderer. Not sure about how/if wrapping of gettimeofday()
* is done, etc.
*/
struct xmesa_query_object
{
struct gl_query_object Base;
struct timeval StartTime;
};
static struct gl_query_object *
xmesa_new_query_object(struct gl_context *ctx, GLuint id)
{
struct xmesa_query_object *q = CALLOC_STRUCT(xmesa_query_object);
if (q) {
q->Base.Id = id;
q->Base.Ready = GL_TRUE;
}
return &q->Base;
}
static void
xmesa_begin_query(struct gl_context *ctx, struct gl_query_object *q)
{
if (q->Target == GL_TIME_ELAPSED_EXT) {
struct xmesa_query_object *xq = (struct xmesa_query_object *) q;
(void) gettimeofday(&xq->StartTime, NULL);
}
}
/**
* Return the difference between the two given times in microseconds.
*/
static GLuint64EXT
time_diff(const struct timeval *t0, const struct timeval *t1)
{
GLuint64EXT seconds0 = t0->tv_sec & 0xff; /* 0 .. 255 seconds */
GLuint64EXT seconds1 = t1->tv_sec & 0xff; /* 0 .. 255 seconds */
GLuint64EXT nanosec0 = (seconds0 * 1000000 + t0->tv_usec) * 1000;
GLuint64EXT nanosec1 = (seconds1 * 1000000 + t1->tv_usec) * 1000;
return nanosec1 - nanosec0;
}
static void
xmesa_end_query(struct gl_context *ctx, struct gl_query_object *q)
{
if (q->Target == GL_TIME_ELAPSED_EXT) {
struct xmesa_query_object *xq = (struct xmesa_query_object *) q;
struct timeval endTime;
(void) gettimeofday(&endTime, NULL);
/* result is in nanoseconds! */
q->Result = time_diff(&xq->StartTime, &endTime);
}
q->Ready = GL_TRUE;
}
#endif /* ENABLE_timer_query */
/**
* Initialize the device driver function table with the functions
* we implement in this driver.
*/
void
xmesa_init_driver_functions( XMesaVisual xmvisual,
struct dd_function_table *driver )
{
driver->GetString = get_string;
driver->UpdateState = xmesa_update_state;
driver->Flush = finish_or_flush;
driver->Finish = finish_or_flush;
driver->ColorMask = color_mask;
driver->Enable = enable;
driver->Viewport = xmesa_viewport;
if (TEST_META_FUNCS) {
driver->Clear = _mesa_meta_Clear;
driver->CopyPixels = _mesa_meta_CopyPixels;
driver->BlitFramebuffer = _mesa_meta_and_swrast_BlitFramebuffer;
driver->DrawPixels = _mesa_meta_DrawPixels;
driver->Bitmap = _mesa_meta_Bitmap;
}
else {
driver->Clear = clear_buffers;
driver->CopyPixels = xmesa_CopyPixels;
if (xmvisual->undithered_pf == PF_8R8G8B &&
xmvisual->dithered_pf == PF_8R8G8B &&
xmvisual->BitsPerPixel == 32) {
driver->DrawPixels = xmesa_DrawPixels_8R8G8B;
}
else if (xmvisual->undithered_pf == PF_5R6G5B) {
driver->DrawPixels = xmesa_DrawPixels_5R6G5B;
}
}
driver->MapRenderbuffer = xmesa_MapRenderbuffer;
driver->UnmapRenderbuffer = xmesa_UnmapRenderbuffer;
driver->GenerateMipmap = _mesa_generate_mipmap;
#if ENABLE_EXT_timer_query
driver->NewQueryObject = xmesa_new_query_object;
driver->BeginQuery = xmesa_begin_query;
driver->EndQuery = xmesa_end_query;
#endif
}
#define XMESA_NEW_POINT (_NEW_POINT | \
_NEW_RENDERMODE | \
_SWRAST_NEW_RASTERMASK)
#define XMESA_NEW_LINE (_NEW_LINE | \
_NEW_TEXTURE | \
_NEW_LIGHT | \
_NEW_DEPTH | \
_NEW_RENDERMODE | \
_SWRAST_NEW_RASTERMASK)
#define XMESA_NEW_TRIANGLE (_NEW_POLYGON | \
_NEW_TEXTURE | \
_NEW_LIGHT | \
_NEW_DEPTH | \
_NEW_RENDERMODE | \
_SWRAST_NEW_RASTERMASK)
/**
* Extend the software rasterizer with our line/point/triangle
* functions.
* Called during context creation only.
*/
void xmesa_register_swrast_functions( struct gl_context *ctx )
{
SWcontext *swrast = SWRAST_CONTEXT( ctx );
swrast->choose_point = xmesa_choose_point;
swrast->choose_line = xmesa_choose_line;
swrast->choose_triangle = xmesa_choose_triangle;
/* XXX these lines have no net effect. Remove??? */
swrast->InvalidatePointMask |= XMESA_NEW_POINT;
swrast->InvalidateLineMask |= XMESA_NEW_LINE;
swrast->InvalidateTriangleMask |= XMESA_NEW_TRIANGLE;
}