void
_swrast_CopyColorSubTable( GLcontext *ctx,GLenum target, GLsizei start,
GLint x, GLint y, GLsizei width)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLchan data[MAX_WIDTH][4];
struct gl_buffer_object *bufferSave;
if (!ctx->ReadBuffer->_ColorReadBuffer) {
/* no readbuffer - OK */
return;
}
if (width > MAX_WIDTH)
width = MAX_WIDTH;
RENDER_START( swrast, ctx );
/* read the data from framebuffer */
_swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
width, x, y, CHAN_TYPE, data );
RENDER_FINISH(swrast,ctx);
/* save PBO binding */
bufferSave = ctx->Unpack.BufferObj;
ctx->Unpack.BufferObj = ctx->Array.NullBufferObj;
_mesa_ColorSubTable(target, start, width, GL_RGBA, CHAN_TYPE, data);
/* restore PBO binding */
ctx->Unpack.BufferObj = bufferSave;
}
void
_swrast_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target,
GLenum internalFormat,
GLint x, GLint y, GLsizei width)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLchan rgba[MAX_CONVOLUTION_WIDTH][4];
struct gl_buffer_object *bufferSave;
if (!ctx->ReadBuffer->_ColorReadBuffer) {
/* no readbuffer - OK */
return;
}
RENDER_START( swrast, ctx );
/* read the data from framebuffer */
_swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
width, x, y, CHAN_TYPE, rgba );
RENDER_FINISH( swrast, ctx );
/* save PBO binding */
bufferSave = ctx->Unpack.BufferObj;
ctx->Unpack.BufferObj = ctx->Array.NullBufferObj;
/* store as convolution filter */
_mesa_ConvolutionFilter1D(target, internalFormat, width,
GL_RGBA, CHAN_TYPE, rgba);
/* restore PBO binding */
ctx->Unpack.BufferObj = bufferSave;
}
/**
* Do software-based glCopyPixels.
* By time we get here, all parameters will have been error-checked.
*/
void
_swrast_CopyPixels( GLcontext *ctx,
GLint srcx, GLint srcy, GLsizei width, GLsizei height,
GLint destx, GLint desty, GLenum type )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
RENDER_START(swrast,ctx);
if (swrast->NewState)
_swrast_validate_derived( ctx );
switch (type) {
case GL_COLOR:
if (ctx->Visual.rgbMode) {
copy_rgba_pixels( ctx, srcx, srcy, width, height, destx, desty );
}
else {
copy_ci_pixels( ctx, srcx, srcy, width, height, destx, desty );
}
break;
case GL_DEPTH:
copy_depth_pixels( ctx, srcx, srcy, width, height, destx, desty );
break;
case GL_STENCIL:
copy_stencil_pixels( ctx, srcx, srcy, width, height, destx, desty );
break;
case GL_DEPTH_STENCIL_EXT:
copy_depth_stencil_pixels(ctx, srcx, srcy, width, height, destx, desty);
break;
default:
_mesa_problem(ctx, "unexpected type in _swrast_CopyPixels");
}
RENDER_FINISH(swrast,ctx);
}
void
_swrast_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target,
GLenum internalFormat,
GLint x, GLint y, GLsizei width)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLchan rgba[MAX_CONVOLUTION_WIDTH][4];
/* Select buffer to read from */
_swrast_use_read_buffer(ctx);
RENDER_START( swrast, ctx );
/* read the data from framebuffer */
_mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y,
(GLchan (*)[4]) rgba );
RENDER_FINISH( swrast, ctx );
/* Restore reading from draw buffer (the default) */
_swrast_use_draw_buffer(ctx);
/* store as convolution filter */
glConvolutionFilter1D(target, internalFormat, width,
GL_RGBA, CHAN_TYPE, rgba);
}
void
_swrast_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target,
GLenum internalFormat,
GLint x, GLint y, GLsizei width, GLsizei height)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
struct gl_pixelstore_attrib packSave;
GLchan rgba[MAX_CONVOLUTION_HEIGHT][MAX_CONVOLUTION_WIDTH][4];
GLint i;
struct gl_buffer_object *bufferSave;
if (!ctx->ReadBuffer->_ColorReadBuffer) {
/* no readbuffer - OK */
return;
}
RENDER_START(swrast,ctx);
/* read pixels from framebuffer */
for (i = 0; i < height; i++) {
_swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
width, x, y + i, CHAN_TYPE, rgba[i] );
}
RENDER_FINISH(swrast,ctx);
/*
* HACK: save & restore context state so we can store this as a
* convolution filter via the GL api. Doesn't call any callbacks
* hanging off ctx->Unpack statechanges.
*/
packSave = ctx->Unpack; /* save pixel packing params */
ctx->Unpack.Alignment = 1;
ctx->Unpack.RowLength = MAX_CONVOLUTION_WIDTH;
ctx->Unpack.SkipPixels = 0;
ctx->Unpack.SkipRows = 0;
ctx->Unpack.ImageHeight = 0;
ctx->Unpack.SkipImages = 0;
ctx->Unpack.SwapBytes = GL_FALSE;
ctx->Unpack.LsbFirst = GL_FALSE;
ctx->Unpack.BufferObj = ctx->Array.NullBufferObj;
ctx->NewState |= _NEW_PACKUNPACK;
/* save PBO binding */
bufferSave = ctx->Unpack.BufferObj;
ctx->Unpack.BufferObj = ctx->Array.NullBufferObj;
_mesa_ConvolutionFilter2D(target, internalFormat, width, height,
GL_RGBA, CHAN_TYPE, rgba);
/* restore PBO binding */
ctx->Unpack.BufferObj = bufferSave;
ctx->Unpack = packSave; /* restore pixel packing params */
ctx->NewState |= _NEW_PACKUNPACK;
}
/**
* Software fallback for glAccum.
*/
void
_swrast_Accum(GLcontext *ctx, GLenum op, GLfloat value)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLint xpos, ypos, width, height;
if (SWRAST_CONTEXT(ctx)->NewState)
_swrast_validate_derived( ctx );
if (!ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer) {
_mesa_warning(ctx, "Calling glAccum() without an accumulation buffer");
return;
}
RENDER_START(swrast, ctx);
/* Compute region after calling RENDER_START so that we know the
* drawbuffer's size/bounds are up to date.
*/
xpos = ctx->DrawBuffer->_Xmin;
ypos = ctx->DrawBuffer->_Ymin;
width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
switch (op) {
case GL_ADD:
if (value != 0.0F) {
accum_add(ctx, value, xpos, ypos, width, height);
}
break;
case GL_MULT:
if (value != 1.0F) {
accum_mult(ctx, value, xpos, ypos, width, height);
}
break;
case GL_ACCUM:
if (value != 0.0F) {
accum_accum(ctx, value, xpos, ypos, width, height);
}
break;
case GL_LOAD:
accum_load(ctx, value, xpos, ypos, width, height);
break;
case GL_RETURN:
accum_return(ctx, value, xpos, ypos, width, height);
break;
default:
_mesa_problem(ctx, "invalid mode in _swrast_Accum()");
break;
}
RENDER_FINISH(swrast, ctx);
}
/**
* Called via the device driver's ctx->Driver.Clear() function if the
* device driver can't clear one or more of the buffers itself.
* \param mask bitfield of BUFER_BIT_* values indicating which renderbuffers
* are to be cleared.
* \param all if GL_TRUE, clear whole buffer, else clear specified region.
*/
void
_swrast_Clear(GLcontext *ctx, GLbitfield mask,
GLboolean all, GLint x, GLint y, GLint width, GLint height)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
(void) all;
(void) x;
(void) y;
(void) width;
(void) height;
#ifdef DEBUG_FOO
{
const GLbitfield legalBits =
BUFFER_BIT_FRONT_LEFT |
BUFFER_BIT_FRONT_RIGHT |
BUFFER_BIT_BACK_LEFT |
BUFFER_BIT_BACK_RIGHT |
BUFFER_BIT_DEPTH |
BUFFER_BIT_STENCIL |
BUFFER_BIT_ACCUM |
BUFFER_BIT_AUX0 |
BUFFER_BIT_AUX1 |
BUFFER_BIT_AUX2 |
BUFFER_BIT_AUX3;
assert((mask & (~legalBits)) == 0);
}
#endif
RENDER_START(swrast,ctx);
/* do software clearing here */
if (mask) {
if (mask & ctx->DrawBuffer->_ColorDrawBufferMask[0]) {
clear_color_buffers(ctx);
}
if (mask & BUFFER_BIT_DEPTH) {
_swrast_clear_depth_buffer(ctx, ctx->DrawBuffer->_DepthBuffer);
}
if (mask & BUFFER_BIT_ACCUM) {
_swrast_clear_accum_buffer(ctx,
ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer);
}
if (mask & BUFFER_BIT_STENCIL) {
_swrast_clear_stencil_buffer(ctx, ctx->DrawBuffer->_StencilBuffer);
}
}
RENDER_FINISH(swrast,ctx);
}
void
_swrast_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target,
GLenum internalFormat,
GLint x, GLint y, GLsizei width, GLsizei height)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
struct gl_pixelstore_attrib packSave;
GLchan rgba[MAX_CONVOLUTION_HEIGHT][MAX_CONVOLUTION_WIDTH][4];
GLint i;
/* Select buffer to read from */
_swrast_use_read_buffer(ctx);
RENDER_START(swrast,ctx);
/* read pixels from framebuffer */
for (i = 0; i < height; i++) {
_mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y + i,
(GLchan (*)[4]) rgba[i] );
}
RENDER_FINISH(swrast,ctx);
/* Restore reading from draw buffer (the default) */
_swrast_use_draw_buffer(ctx);
/*
* HACK: save & restore context state so we can store this as a
* convolution filter via the GL api. Doesn't call any callbacks
* hanging off ctx->Unpack statechanges.
*/
packSave = ctx->Unpack; /* save pixel packing params */
ctx->Unpack.Alignment = 1;
ctx->Unpack.RowLength = MAX_CONVOLUTION_WIDTH;
ctx->Unpack.SkipPixels = 0;
ctx->Unpack.SkipRows = 0;
ctx->Unpack.ImageHeight = 0;
ctx->Unpack.SkipImages = 0;
ctx->Unpack.SwapBytes = GL_FALSE;
ctx->Unpack.LsbFirst = GL_FALSE;
ctx->NewState |= _NEW_PACKUNPACK;
glConvolutionFilter2D(target, internalFormat, width, height,
GL_RGBA, CHAN_TYPE, rgba);
ctx->Unpack = packSave; /* restore pixel packing params */
ctx->NewState |= _NEW_PACKUNPACK;
}
void
_swrast_Clear( GLcontext *ctx, GLbitfield mask,
GLboolean all,
GLint x, GLint y, GLint width, GLint height )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
#ifdef DEBUG
{
GLbitfield legalBits = DD_FRONT_LEFT_BIT |
DD_FRONT_RIGHT_BIT |
DD_BACK_LEFT_BIT |
DD_BACK_RIGHT_BIT |
DD_DEPTH_BIT |
DD_STENCIL_BIT |
DD_ACCUM_BIT;
assert((mask & (~legalBits)) == 0);
}
#endif
RENDER_START(swrast,ctx);
/* do software clearing here */
if (mask) {
if (mask & ctx->Color._DrawDestMask) clear_color_buffers(ctx);
if (mask & GL_DEPTH_BUFFER_BIT) _swrast_clear_depth_buffer(ctx);
if (mask & GL_ACCUM_BUFFER_BIT) _swarst_clear_accum_buffer(ctx);
if (mask & GL_STENCIL_BUFFER_BIT) _swrast_clear_stencil_buffer(ctx);
}
/* clear software-based alpha buffer(s) */
if ( (mask & GL_COLOR_BUFFER_BIT)
&& ctx->DrawBuffer->UseSoftwareAlphaBuffers
&& ctx->Color.ColorMask[ACOMP]) {
_swrast_clear_alpha_buffers( ctx );
}
RENDER_FINISH(swrast,ctx);
}
/*
* Render a bitmap.
*/
void
_swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
GLsizei width, GLsizei height,
const struct gl_pixelstore_attrib *unpack,
const GLubyte *bitmap )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLint row, col;
GLuint count = 0;
struct sw_span span;
ASSERT(ctx->RenderMode == GL_RENDER);
ASSERT(bitmap);
RENDER_START(swrast,ctx);
if (SWRAST_CONTEXT(ctx)->NewState)
_swrast_validate_derived( ctx );
INIT_SPAN(span, GL_BITMAP, width, 0, SPAN_XY);
if (ctx->Visual.rgbMode) {
span.interpMask |= SPAN_RGBA;
span.red = FloatToFixed(ctx->Current.RasterColor[0] * CHAN_MAXF);
span.green = FloatToFixed(ctx->Current.RasterColor[1] * CHAN_MAXF);
span.blue = FloatToFixed(ctx->Current.RasterColor[2] * CHAN_MAXF);
span.alpha = FloatToFixed(ctx->Current.RasterColor[3] * CHAN_MAXF);
span.redStep = span.greenStep = span.blueStep = span.alphaStep = 0;
}
else {
span.interpMask |= SPAN_INDEX;
span.index = ChanToFixed(ctx->Current.RasterIndex);
span.indexStep = 0;
}
if (ctx->Depth.Test)
_mesa_span_default_z(ctx, &span);
if (ctx->Fog.Enabled)
_mesa_span_default_fog(ctx, &span);
if (ctx->Texture._EnabledUnits)
_mesa_span_default_texcoords(ctx, &span);
for (row = 0; row < height; row++, span.y++) {
const GLubyte *src = (const GLubyte *) _mesa_image_address( unpack,
bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, 0, row, 0 );
if (unpack->LsbFirst) {
/* Lsb first */
GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
for (col = 0; col < width; col++) {
if (*src & mask) {
span.array->x[count] = px + col;
span.array->y[count] = py + row;
count++;
}
if (mask == 128U) {
src++;
mask = 1U;
}
else {
mask = mask << 1;
}
}
/* get ready for next row */
if (mask != 1)
src++;
}
else {
/* Msb first */
GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
for (col = 0; col < width; col++) {
if (*src & mask) {
span.array->x[count] = px + col;
span.array->y[count] = py + row;
count++;
}
if (mask == 1U) {
src++;
mask = 128U;
}
else {
mask = mask >> 1;
}
}
/* get ready for next row */
if (mask != 128)
src++;
}
if (count + width >= MAX_WIDTH || row + 1 == height) {
/* flush the span */
span.end = count;
if (ctx->Visual.rgbMode)
_mesa_write_rgba_span(ctx, &span);
else
_mesa_write_index_span(ctx, &span);
span.end = 0;
count = 0;
}
}
RENDER_FINISH(swrast,ctx);
}
/**
* Render a bitmap.
* Called via ctx->Driver.Bitmap()
* All parameter error checking will have been done before this is called.
*/
void
_swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
GLsizei width, GLsizei height,
const struct gl_pixelstore_attrib *unpack,
const GLubyte *bitmap )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLint row, col;
GLuint count = 0;
SWspan span;
ASSERT(ctx->RenderMode == GL_RENDER);
bitmap = _mesa_map_bitmap_pbo(ctx, unpack, bitmap);
if (!bitmap)
return;
RENDER_START(swrast,ctx);
if (SWRAST_CONTEXT(ctx)->NewState)
_swrast_validate_derived( ctx );
INIT_SPAN(span, GL_BITMAP);
span.end = width;
span.arrayMask = SPAN_XY;
_swrast_span_default_attribs(ctx, &span);
for (row = 0; row < height; row++) {
const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
if (unpack->LsbFirst) {
/* Lsb first */
GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
for (col = 0; col < width; col++) {
if (*src & mask) {
span.array->x[count] = px + col;
span.array->y[count] = py + row;
count++;
}
if (mask == 128U) {
src++;
mask = 1U;
}
else {
mask = mask << 1;
}
}
/* get ready for next row */
if (mask != 1)
src++;
}
else {
/* Msb first */
GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
for (col = 0; col < width; col++) {
if (*src & mask) {
span.array->x[count] = px + col;
span.array->y[count] = py + row;
count++;
}
if (mask == 1U) {
src++;
mask = 128U;
}
else {
mask = mask >> 1;
}
}
/* get ready for next row */
if (mask != 128)
src++;
}
if (count + width >= MAX_WIDTH || row + 1 == height) {
/* flush the span */
span.end = count;
if (ctx->Visual.rgbMode)
_swrast_write_rgba_span(ctx, &span);
else
_swrast_write_index_span(ctx, &span);
span.end = 0;
count = 0;
}
}
RENDER_FINISH(swrast,ctx);
_mesa_unmap_bitmap_pbo(ctx, unpack);
}
/*
* XXX this is another way to implement Bitmap. Use horizontal runs of
* fragments, initializing the mask array to indicate which fragments to
* draw or skip.
*/
void
_swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
GLsizei width, GLsizei height,
const struct gl_pixelstore_attrib *unpack,
const GLubyte *bitmap )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLint row, col;
SWspan span;
ASSERT(ctx->RenderMode == GL_RENDER);
ASSERT(bitmap);
RENDER_START(swrast,ctx);
if (SWRAST_CONTEXT(ctx)->NewState)
_swrast_validate_derived( ctx );
INIT_SPAN(span, GL_BITMAP);
span.end = width;
span.arrayMask = SPAN_MASK;
_swrast_span_default_attribs(ctx, &span);
/*span.arrayMask |= SPAN_MASK;*/ /* we'll init span.mask[] */
span.x = px;
span.y = py;
/*span.end = width;*/
for (row=0; row<height; row++, span.y++) {
const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
if (unpack->LsbFirst) {
/* Lsb first */
GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
for (col=0; col<width; col++) {
span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
if (mask == 128U) {
src++;
mask = 1U;
}
else {
mask = mask << 1;
}
}
if (ctx->Visual.rgbMode)
_swrast_write_rgba_span(ctx, &span);
else
_swrast_write_index_span(ctx, &span);
/* get ready for next row */
if (mask != 1)
src++;
}
else {
/* Msb first */
GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
for (col=0; col<width; col++) {
span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
if (mask == 1U) {
src++;
mask = 128U;
}
else {
mask = mask >> 1;
}
}
if (ctx->Visual.rgbMode)
_swrast_write_rgba_span(ctx, &span);
else
_swrast_write_index_span(ctx, &span);
/* get ready for next row */
if (mask != 128)
src++;
}
}
RENDER_FINISH(swrast,ctx);
}