/**
* Reallocate renderbuffer storage for back color buffer.
* Called via gl_renderbuffer::AllocStorage()
*/
static GLboolean
xmesa_alloc_back_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
GLenum internalFormat, GLuint width, GLuint height)
{
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
/* reallocate the back buffer XImage or Pixmap */
assert(xrb->Parent);
alloc_back_buffer(xrb->Parent, width, height);
/* same as front buffer */
/* XXX why is this here? */
(void) xmesa_alloc_front_storage(ctx, rb, internalFormat, width, height);
/* plus... */
if (xrb->ximage) {
/* Needed by PIXELADDR1 macro */
xrb->width1 = xrb->ximage->bytes_per_line;
xrb->origin1 = (GLubyte *) xrb->ximage->data + xrb->width1 * (height - 1);
/* Needed by PIXELADDR2 macro */
xrb->width2 = xrb->ximage->bytes_per_line / 2;
xrb->origin2 = (GLushort *) xrb->ximage->data + xrb->width2 * (height - 1);
/* Needed by PIXELADDR3 macro */
xrb->width3 = xrb->ximage->bytes_per_line;
xrb->origin3 = (GLubyte *) xrb->ximage->data + xrb->width3 * (height - 1);
/* Needed by PIXELADDR4 macro */
xrb->width4 = xrb->ximage->width;
xrb->origin4 = (GLuint *) xrb->ximage->data + xrb->width4 * (height - 1);
}
else {
/* out of memory or buffer size is 0 x 0 */
xrb->width1 = xrb->width2 = xrb->width3 = xrb->width4 = 0;
xrb->origin1 = NULL;
xrb->origin2 = NULL;
xrb->origin3 = NULL;
xrb->origin4 = NULL;
}
return GL_TRUE;
}
/**
* Reallocate renderbuffer storage for front color buffer.
* Called via gl_renderbuffer::AllocStorage()
*/
static GLboolean
xmesa_alloc_front_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
GLenum internalFormat, GLuint width, GLuint height)
{
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
/* just clear these to be sure we don't accidentally use them */
xrb->origin2 = NULL;
xrb->origin3 = NULL;
xrb->origin4 = NULL;
/* for the FLIP macro: */
xrb->bottom = height - 1;
rb->Width = width;
rb->Height = height;
rb->InternalFormat = internalFormat;
return GL_TRUE;
}
/**
* Called via ctx->Driver.UnmapRenderbuffer()
*/
void
xmesa_UnmapRenderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
{
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
if (xrb->Base.Base.ClassID == XMESA_RENDERBUFFER) {
XImage *ximage = xrb->ximage;
if (!ximage) {
/* this must be a pixmap/window renderbuffer */
assert(xrb->pixmap);
assert(xrb->map_ximage);
if (xrb->map_ximage) {
if (xrb->map_mode & GL_MAP_WRITE_BIT) {
/* put modified ximage data back into the pixmap/window */
int y2 = rb->Height - xrb->map_y - xrb->map_h;
GC gc = XCreateGC(xrb->Parent->display, xrb->pixmap, 0, NULL);
XPutImage(xrb->Parent->display,
xrb->pixmap, /* dest */
gc,
xrb->map_ximage, /* source */
0, 0, /* src x, y */
xrb->map_x, y2, /* dest x, y */
xrb->map_w, xrb->map_h); /* size */
XFreeGC(xrb->Parent->display, gc);
}
XMesaDestroyImage(xrb->map_ximage);
xrb->map_ximage = NULL;
}
}
xrb->map_mode = 0x0;
return;
}
/* otherwise, this is an ordinary malloc-based renderbuffer */
_swrast_unmap_soft_renderbuffer(ctx, rb);
}
/*
* Return the depth buffer associated with an XMesaBuffer.
* Input: b - the XMesa buffer handle
* Output: width, height - size of buffer in pixels
* bytesPerValue - bytes per depth value (2 or 4)
* buffer - pointer to depth buffer values
* Return: GL_TRUE or GL_FALSE to indicate success or failure.
*/
GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
GLint *bytesPerValue, void **buffer )
{
struct gl_renderbuffer *rb
= b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer;
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
if (!xrb || !xrb->Base.Buffer) {
*width = 0;
*height = 0;
*bytesPerValue = 0;
*buffer = 0;
return GL_FALSE;
}
else {
*width = b->mesa_buffer.Width;
*height = b->mesa_buffer.Height;
*bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16
? sizeof(GLushort) : sizeof(GLuint);
*buffer = (void *) xrb->Base.Buffer;
return GL_TRUE;
}
}
/**
* Return pointer to line drawing function, or NULL if we should use a
* swrast fallback.
*/
static swrast_tri_func
get_triangle_func(struct gl_context *ctx)
{
#if CHAN_BITS == 8
SWcontext *swrast = SWRAST_CONTEXT(ctx);
XMesaContext xmesa = XMESA_CONTEXT(ctx);
const struct xmesa_renderbuffer *xrb;
#ifdef DEBUG
triFuncName = NULL;
#endif
/* trivial fallback tests */
if ((ctx->DrawBuffer->_ColorDrawBufferIndexes[0] != BUFFER_BIT_FRONT_LEFT) &&
(ctx->DrawBuffer->_ColorDrawBufferIndexes[0] != BUFFER_BIT_BACK_LEFT))
return (swrast_tri_func) NULL;
if (ctx->RenderMode != GL_RENDER)
return (swrast_tri_func) NULL;
if (ctx->Polygon.SmoothFlag)
return (swrast_tri_func) NULL;
if (ctx->Texture._EnabledUnits)
return (swrast_tri_func) NULL;
if (swrast->_RasterMask & MULTI_DRAW_BIT)
return (swrast_tri_func) NULL;
if (ctx->Polygon.CullFlag &&
ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
return (swrast_tri_func) NULL;
xrb = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
if (xrb->ximage) {
if ( ctx->Light.ShadeModel==GL_SMOOTH
&& swrast->_RasterMask==DEPTH_BIT
&& ctx->Depth.Func==GL_LESS
&& ctx->Depth.Mask==GL_TRUE
&& ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS
&& ctx->Polygon.StippleFlag==GL_FALSE) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
USE(smooth_TRUECOLOR_z_triangle);
case PF_8A8B8G8R:
USE(smooth_8A8B8G8R_z_triangle);
case PF_8A8R8G8B:
USE(smooth_8A8R8G8B_z_triangle);
case PF_8R8G8B:
USE(smooth_8R8G8B_z_triangle);
case PF_8R8G8B24:
USE(smooth_8R8G8B24_z_triangle);
case PF_Dither_True:
USE(smooth_TRUEDITHER_z_triangle);
case PF_5R6G5B:
USE(smooth_5R6G5B_z_triangle);
case PF_Dither_5R6G5B:
USE(smooth_DITHER_5R6G5B_z_triangle);
default:
return (swrast_tri_func) NULL;
}
}
if ( ctx->Light.ShadeModel==GL_FLAT
&& swrast->_RasterMask==DEPTH_BIT
&& ctx->Depth.Func==GL_LESS
&& ctx->Depth.Mask==GL_TRUE
&& ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS
&& ctx->Polygon.StippleFlag==GL_FALSE) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
USE(flat_TRUECOLOR_z_triangle);
case PF_8A8B8G8R:
USE(flat_8A8B8G8R_z_triangle);
case PF_8A8R8G8B:
USE(flat_8A8R8G8B_z_triangle);
case PF_8R8G8B:
USE(flat_8R8G8B_z_triangle);
case PF_8R8G8B24:
USE(flat_8R8G8B24_z_triangle);
case PF_Dither_True:
USE(flat_TRUEDITHER_z_triangle);
case PF_5R6G5B:
USE(flat_5R6G5B_z_triangle);
case PF_Dither_5R6G5B:
USE(flat_DITHER_5R6G5B_z_triangle);
default:
return (swrast_tri_func) NULL;
}
}
if ( swrast->_RasterMask==0 /* no depth test */
&& ctx->Light.ShadeModel==GL_SMOOTH
&& ctx->Polygon.StippleFlag==GL_FALSE) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
USE(smooth_TRUECOLOR_triangle);
case PF_8A8B8G8R:
USE(smooth_8A8B8G8R_triangle);
case PF_8A8R8G8B:
USE(smooth_8A8R8G8B_triangle);
case PF_8R8G8B:
USE(smooth_8R8G8B_triangle);
case PF_8R8G8B24:
USE(smooth_8R8G8B24_triangle);
case PF_Dither_True:
USE(smooth_TRUEDITHER_triangle);
case PF_5R6G5B:
USE(smooth_5R6G5B_triangle);
case PF_Dither_5R6G5B:
USE(smooth_DITHER_5R6G5B_triangle);
default:
return (swrast_tri_func) NULL;
}
}
if ( swrast->_RasterMask==0 /* no depth test */
&& ctx->Light.ShadeModel==GL_FLAT
&& ctx->Polygon.StippleFlag==GL_FALSE) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
USE(flat_TRUECOLOR_triangle);
case PF_Dither_True:
USE(flat_TRUEDITHER_triangle);
case PF_8A8B8G8R:
USE(flat_8A8B8G8R_triangle);
case PF_8A8R8G8B:
USE(flat_8A8R8G8B_triangle);
case PF_8R8G8B:
USE(flat_8R8G8B_triangle);
case PF_8R8G8B24:
USE(flat_8R8G8B24_triangle);
case PF_5R6G5B:
USE(flat_5R6G5B_triangle);
case PF_Dither_5R6G5B:
USE(flat_DITHER_5R6G5B_triangle);
default:
return (swrast_tri_func) NULL;
}
}
}
#endif /* CHAN_BITS == 8 */
return (swrast_tri_func) NULL;
}
/**
* Return pointer to line drawing function, or NULL if we should use a
* swrast fallback.
*/
static swrast_line_func
get_line_func(struct gl_context *ctx)
{
#if CHAN_BITS == 8
SWcontext *swrast = SWRAST_CONTEXT(ctx);
XMesaContext xmesa = XMESA_CONTEXT(ctx);
const struct xmesa_renderbuffer *xrb;
if ((ctx->DrawBuffer->_ColorDrawBufferIndexes[0] != BUFFER_BIT_FRONT_LEFT) &&
(ctx->DrawBuffer->_ColorDrawBufferIndexes[0] != BUFFER_BIT_BACK_LEFT))
return (swrast_line_func) NULL;
if (ctx->RenderMode != GL_RENDER) return (swrast_line_func) NULL;
if (ctx->Line.SmoothFlag) return (swrast_line_func) NULL;
if (ctx->Texture._MaxEnabledTexImageUnit != -1) return (swrast_line_func) NULL;
if (ctx->Light.ShadeModel != GL_FLAT) return (swrast_line_func) NULL;
if (ctx->Line.StippleFlag) return (swrast_line_func) NULL;
if (swrast->_RasterMask & MULTI_DRAW_BIT) return (swrast_line_func) NULL;
xrb = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
if (xrb->ximage
&& swrast->_RasterMask==DEPTH_BIT
&& ctx->Depth.Func==GL_LESS
&& ctx->Depth.Mask==GL_TRUE
&& ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS
&& ctx->Line.Width==1.0F) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
return flat_TRUECOLOR_z_line;
case PF_8A8B8G8R:
return flat_8A8B8G8R_z_line;
case PF_8A8R8G8B:
return flat_8A8R8G8B_z_line;
case PF_8R8G8B:
return flat_8R8G8B_z_line;
case PF_8R8G8B24:
return flat_8R8G8B24_z_line;
case PF_5R6G5B:
return flat_5R6G5B_z_line;
case PF_Dither_5R6G5B:
return flat_DITHER_5R6G5B_z_line;
default:
return (swrast_line_func)NULL;
}
}
if (xrb->ximage
&& swrast->_RasterMask==0
&& ctx->Line.Width==1.0F) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
return flat_TRUECOLOR_line;
case PF_8A8B8G8R:
return flat_8A8B8G8R_line;
case PF_8A8R8G8B:
return flat_8A8R8G8B_line;
case PF_8R8G8B:
return flat_8R8G8B_line;
case PF_8R8G8B24:
return flat_8R8G8B24_line;
case PF_5R6G5B:
return flat_5R6G5B_line;
case PF_Dither_5R6G5B:
return flat_DITHER_5R6G5B_line;
default:
return (swrast_line_func)NULL;
}
}
if (ctx->DrawBuffer->_NumColorDrawBuffers == 1
&& ctx->DrawBuffer->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT
&& swrast->_RasterMask == LOGIC_OP_BIT
&& ctx->Color.LogicOp == GL_XOR
&& !ctx->Line.StippleFlag
&& !ctx->Line.SmoothFlag) {
return xor_line;
}
#endif /* CHAN_BITS == 8 */
return (swrast_line_func) NULL;
}
/**
* Called via ctx->Driver.MapRenderbuffer()
*/
void
xmesa_MapRenderbuffer(struct gl_context *ctx,
struct gl_renderbuffer *rb,
GLuint x, GLuint y, GLuint w, GLuint h,
GLbitfield mode,
GLubyte **mapOut, GLint *rowStrideOut)
{
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
if (xrb->Base.Base.ClassID == XMESA_RENDERBUFFER) {
XImage *ximage = xrb->ximage;
assert(!xrb->map_mode); /* only a single mapping allowed */
xrb->map_mode = mode;
xrb->map_x = x;
xrb->map_y = y;
xrb->map_w = w;
xrb->map_h = h;
if (ximage) {
int y2 = rb->Height - y - 1;
*mapOut = (GLubyte *) ximage->data
+ y2 * ximage->bytes_per_line
+ x * ximage->bits_per_pixel / 8;
}
else {
/* this must be a pixmap/window renderbuffer */
int (*old_handler)(XMesaDisplay *, XErrorEvent *);
int y2 = rb->Height - y - h;
assert(xrb->pixmap);
/* Install error handler for XGetImage() in case the the window
* isn't mapped. If we fail we'll create a temporary XImage.
*/
mesaXErrorFlag = 0;
old_handler = XSetErrorHandler(mesaHandleXError);
/* read pixel data out of the pixmap/window into an XImage */
ximage = XGetImage(xrb->Parent->display,
xrb->pixmap, x, y2, w, h,
AllPlanes, ZPixmap);
XSetErrorHandler(old_handler);
if (mesaXErrorFlag) {
/* create new, temporary XImage */
int bytes_per_line =
_mesa_format_row_stride(xrb->Base.Base.Format,
xrb->Base.Base.Width);
char *image = (char *) malloc(bytes_per_line *
xrb->Base.Base.Height);
ximage = XCreateImage(xrb->Parent->display,
xrb->Parent->xm_visual->visinfo->visual,
xrb->Parent->xm_visual->visinfo->depth,
ZPixmap, /* format */
0, /* offset */
image, /* data */
xrb->Base.Base.Width,
xrb->Base.Base.Height,
8, /* pad */
bytes_per_line);
}
if (!ximage) {
*mapOut = NULL;
*rowStrideOut = 0;
return;
}
xrb->map_ximage = ximage;
/* the first row of the OpenGL image is last row of the XImage */
*mapOut = (GLubyte *) ximage->data
+ (h - 1) * ximage->bytes_per_line;
}
/* We return a negative stride here since XImage data is upside down
* with respect to OpenGL images.
*/
*rowStrideOut = -ximage->bytes_per_line;
return;
}
/* otherwise, this is an ordinary malloc-based renderbuffer */
_swrast_map_soft_renderbuffer(ctx, rb, x, y, w, h, mode,
mapOut, rowStrideOut);
}
/**
* Called via ctx->Driver.MapRenderbuffer()
*/
void
xmesa_MapRenderbuffer(struct gl_context *ctx,
struct gl_renderbuffer *rb,
GLuint x, GLuint y, GLuint w, GLuint h,
GLbitfield mode,
GLubyte **mapOut, GLint *rowStrideOut)
{
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
if (xrb->Base.Base.ClassID == XMESA_RENDERBUFFER) {
XImage *ximage = xrb->ximage;
assert(!xrb->map_mode); /* only a single mapping allowed */
xrb->map_mode = mode;
xrb->map_x = x;
xrb->map_y = y;
xrb->map_w = w;
xrb->map_h = h;
if (ximage) {
int y2 = rb->Height - y - 1;
*mapOut = (GLubyte *) ximage->data
+ y2 * ximage->bytes_per_line
+ x * ximage->bits_per_pixel / 8;
}
else {
/* this must be a pixmap/window renderbuffer */
int y2 = rb->Height - y - h;
assert(xrb->pixmap);
/* read pixel data out of the pixmap/window into an XImage */
ximage = XGetImage(xrb->Parent->display,
xrb->pixmap, x, y2, w, h,
AllPlanes, ZPixmap);
if (!ximage) {
*mapOut = NULL;
*rowStrideOut = 0;
return;
}
xrb->map_ximage = ximage;
/* the first row of the OpenGL image is last row of the XImage */
*mapOut = (GLubyte *) ximage->data
+ (h - 1) * ximage->bytes_per_line;
}
/* We return a negative stride here since XImage data is upside down
* with respect to OpenGL images.
*/
*rowStrideOut = -ximage->bytes_per_line;
return;
}
/* otherwise, this is an ordinary malloc-based renderbuffer */
_swrast_map_soft_renderbuffer(ctx, rb, x, y, w, h, mode,
mapOut, rowStrideOut);
}
PUBLIC void
XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer,
const int *attrib_list)
{
#if 0
GET_CURRENT_CONTEXT(ctx);
const GLuint unit = ctx->Texture.CurrentUnit;
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
struct gl_texture_object *texObj;
#endif
struct gl_renderbuffer *rb;
struct xmesa_renderbuffer *xrb;
GLint b;
XMesaImage *img = NULL;
GLboolean freeImg = GL_FALSE;
b = xbuffer_to_renderbuffer(buffer);
if (b < 0)
return;
if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT)
return; /* BadMatch error */
rb = drawable->mesa_buffer.Attachment[b].Renderbuffer;
if (!rb) {
/* invalid buffer */
return;
}
xrb = xmesa_renderbuffer(rb);
#if 0
switch (drawable->TextureTarget) {
case GLX_TEXTURE_1D_EXT:
texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX];
break;
case GLX_TEXTURE_2D_EXT:
texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX];
break;
case GLX_TEXTURE_RECTANGLE_EXT:
texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX];
break;
default:
return; /* BadMatch error */
}
#endif
/*
* The following is a quick and simple way to implement
* BindTexImage. The better way is to write some new FetchTexel()
* functions which would extract texels from XImages. We'd still
* need to use GetImage when texturing from a Pixmap (front buffer)
* but texturing from a back buffer (XImage) would avoid an image
* copy.
*/
/* get XImage */
if (xrb->pixmap) {
img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L,
ZPixmap);
freeImg = GL_TRUE;
}
else if (xrb->ximage) {
img = xrb->ximage;
}
/* store the XImage as a new texture image */
if (img) {
GLenum format, type, intFormat;
if (img->bits_per_pixel == 32) {
format = GL_BGRA;
type = GL_UNSIGNED_BYTE;
intFormat = GL_RGBA;
}
else if (img->bits_per_pixel == 24) {
format = GL_BGR;
type = GL_UNSIGNED_BYTE;
intFormat = GL_RGB;
}
else if (img->bits_per_pixel == 16) {
format = GL_BGR;
type = GL_UNSIGNED_SHORT_5_6_5;
intFormat = GL_RGB;
}
else {
_mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage");
return;
}
if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) {
intFormat = GL_RGBA;
}
else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) {
intFormat = GL_RGB;
}
_mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0,
format, type, img->data);
if (freeImg) {
XMesaDestroyImage(img);
}
}
}