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;
}
/**
* Apply the current logic operator to a span of RGBA pixels.
* We can handle horizontal runs of pixels (spans) or arrays of x/y
* pixel coordinates.
*/
void
_swrast_logicop_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb,
const struct sw_span *span, GLchan rgba[][4])
{
GLchan dest[MAX_WIDTH][4];
ASSERT(span->end < MAX_WIDTH);
ASSERT(span->arrayMask & SPAN_RGBA);
ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
if (span->arrayMask & SPAN_XY) {
_swrast_get_values(ctx, rb, span->end, span->array->x, span->array->y,
dest, 4 * sizeof(GLchan));
}
else {
_swrast_read_rgba_span(ctx, rb, span->end, span->x, span->y, dest);
}
/* XXX make this a runtime test */
#if CHAN_TYPE == GL_UNSIGNED_BYTE
/* treat 4*GLubyte as GLuint */
logicop_uint(ctx, span->end, (GLuint *) rgba,
(const GLuint *) dest, span->array->mask);
#elif CHAN_TYPE == GL_UNSIGNED_SHORT
logicop_ushort(ctx, 4 * span->end, (GLushort *) rgba,
(const GLushort *) dest, span->array->mask);
#elif CHAN_TYPE == GL_FLOAT
logicop_uint(ctx, 4 * span->end, (GLuint *) rgba,
(const GLuint *) dest, span->array->mask);
#endif
(void) logicop_ubyte;
(void) logicop_ushort;
(void) logicop_uint;
}
/*
* Apply the current logic operator to a span of RGBA pixels.
* We can handle horizontal runs of pixels (spans) or arrays of x/y
* pixel coordinates.
*/
void
_swrast_logicop_rgba_span( GLcontext *ctx, const struct sw_span *span,
GLchan rgba[][4] )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLchan dest[MAX_WIDTH][4];
ASSERT(span->end < MAX_WIDTH);
ASSERT(span->arrayMask & SPAN_RGBA);
if (span->arrayMask & SPAN_XY) {
(*swrast->Driver.ReadRGBAPixels)(ctx, span->end,
span->array->x, span->array->y,
dest, span->array->mask);
if (SWRAST_CONTEXT(ctx)->_RasterMask & ALPHABUF_BIT) {
_swrast_read_alpha_pixels(ctx, span->end,
span->array->x, span->array->y,
dest, span->array->mask);
}
}
else {
_swrast_read_rgba_span(ctx, ctx->DrawBuffer, span->end,
span->x, span->y, dest);
}
if (sizeof(GLchan) * 4 == sizeof(GLuint)) {
rgba_logicop_ui(ctx, span->end, span->array->mask,
(GLuint *) rgba, (const GLuint *) dest);
}
else {
rgba_logicop_chan(ctx, 4 * span->end, span->array->mask,
(GLchan *) rgba, (const GLchan *) dest);
}
}
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;
}
static void
accum_load(GLcontext *ctx, GLfloat value,
GLint xpos, GLint ypos, GLint width, GLint height )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
struct gl_renderbuffer *rb
= ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
assert(rb);
if (!ctx->ReadBuffer->_ColorReadBuffer) {
/* no read buffer - OK */
return;
}
/* This is a change to go into optimized accum buffer mode */
if (value > 0.0 && value <= 1.0) {
#if USE_OPTIMIZED_ACCUM
swrast->_IntegerAccumMode = GL_TRUE;
#else
swrast->_IntegerAccumMode = GL_FALSE;
#endif
swrast->_IntegerAccumScaler = value;
}
else {
swrast->_IntegerAccumMode = GL_FALSE;
swrast->_IntegerAccumScaler = 0.0;
}
if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
GLshort accumRow[4 * MAX_WIDTH];
GLchan rgba[MAX_WIDTH][4];
GLint i;
for (i = 0; i < height; i++) {
GLshort *acc;
if (directAccess) {
acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
}
else {
rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
acc = accumRow;
}
/* read colors from color buffer */
_swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
xpos, ypos + i, CHAN_TYPE, rgba);
/* do load */
if (swrast->_IntegerAccumMode) {
/* just copy values in */
GLint j;
assert(swrast->_IntegerAccumScaler > 0.0);
assert(swrast->_IntegerAccumScaler <= 1.0);
for (j = 0; j < width; j++) {
acc[j * 4 + 0] = rgba[j][RCOMP];
acc[j * 4 + 1] = rgba[j][GCOMP];
acc[j * 4 + 2] = rgba[j][BCOMP];
acc[j * 4 + 3] = rgba[j][ACOMP];
}
}
else {
/* scaled integer (or float) accum buffer */
GLint j;
for (j = 0; j < width; j++) {
acc[j * 4 + 0] = (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
acc[j * 4 + 1] = (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
acc[j * 4 + 2] = (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
acc[j * 4 + 3] = (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
}
}
if (!directAccess) {
rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
}
}
}
}
static void
accum_accum(GLcontext *ctx, GLfloat value,
GLint xpos, GLint ypos, GLint width, GLint height )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
struct gl_renderbuffer *rb
= ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
assert(rb);
if (!ctx->ReadBuffer->_ColorReadBuffer) {
/* no read buffer - OK */
return;
}
/* May have to leave optimized accum buffer mode */
if (swrast->_IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0)
swrast->_IntegerAccumScaler = value;
if (swrast->_IntegerAccumMode && value != swrast->_IntegerAccumScaler)
rescale_accum(ctx);
if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
GLshort accumRow[4 * MAX_WIDTH];
GLchan rgba[MAX_WIDTH][4];
GLint i;
for (i = 0; i < height; i++) {
GLshort *acc;
if (directAccess) {
acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
}
else {
rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
acc = accumRow;
}
/* read colors from color buffer */
_swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
xpos, ypos + i, CHAN_TYPE, rgba);
/* do accumulation */
if (swrast->_IntegerAccumMode) {
/* simply add integer color values into accum buffer */
GLint j;
for (j = 0; j < width; j++) {
acc[j * 4 + 0] += rgba[j][RCOMP];
acc[j * 4 + 1] += rgba[j][GCOMP];
acc[j * 4 + 2] += rgba[j][BCOMP];
acc[j * 4 + 3] += rgba[j][ACOMP];
}
}
else {
/* scaled integer (or float) accum buffer */
GLint j;
for (j = 0; j < width; j++) {
acc[j * 4 + 0] += (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
acc[j * 4 + 1] += (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
acc[j * 4 + 2] += (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
acc[j * 4 + 3] += (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
}
}
if (!directAccess) {
rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
}
}
}
else {
/* other types someday */
}
}
/*
* RGBA copypixels
*/
static void
copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
GLint width, GLint height, GLint destx, GLint desty)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
struct gl_renderbuffer *drawRb;
GLchan *tmpImage,*p;
GLboolean quick_draw;
GLint sy, dy, stepy, j;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
GLint overlapping;
const GLuint transferOps = ctx->_ImageTransferState;
struct sw_span span;
if (!ctx->ReadBuffer->_ColorReadBuffer) {
/* no readbuffer - OK */
return;
}
INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
copy_conv_rgba_pixels(ctx, srcx, srcy, width, height, destx, desty);
return;
}
/* Determine if copy should be done bottom-to-top or top-to-bottom */
if (srcy < desty) {
/* top-down max-to-min */
sy = srcy + height - 1;
dy = desty + height - 1;
stepy = -1;
}
else {
/* bottom-up min-to-max */
sy = srcy;
dy = desty;
stepy = 1;
}
if (ctx->DrawBuffer == ctx->ReadBuffer) {
overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
}
else {
overlapping = GL_FALSE;
}
if (ctx->Depth.Test)
_swrast_span_default_z(ctx, &span);
if (swrast->_FogEnabled)
_swrast_span_default_fog(ctx, &span);
if (SWRAST_CONTEXT(ctx)->_RasterMask == 0
&& !zoom
&& destx >= 0
&& destx + width <= (GLint) ctx->DrawBuffer->Width) {
quick_draw = GL_TRUE;
drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
}
else {
quick_draw = GL_FALSE;
drawRb = NULL;
}
if (overlapping) {
GLint ssy = sy;
tmpImage = (GLchan *) _mesa_malloc(width * height * sizeof(GLchan) * 4);
if (!tmpImage) {
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
}
/* read the source image */
p = tmpImage;
for (j = 0; j < height; j++, ssy += stepy) {
_swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
width, srcx, ssy, (GLchan (*)[4]) p );
p += width * 4;
}
p = tmpImage;
}
else {
tmpImage = NULL; /* silence compiler warnings */
p = NULL;
}
for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
/* Get source pixels */
if (overlapping) {
/* get from buffered image */
ASSERT(width < MAX_WIDTH);
_mesa_memcpy(span.array->rgba, p, width * sizeof(GLchan) * 4);
p += width * 4;
}
else {
/* get from framebuffer */
ASSERT(width < MAX_WIDTH);
_swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
width, srcx, sy, span.array->rgba );
}
if (transferOps) {
GLfloat rgbaFloat[MAX_WIDTH][4];
/* convert to float, transfer, convert back to chan */
chan_span_to_float(width, (CONST GLchan (*)[4]) span.array->rgba,
rgbaFloat);
_mesa_apply_rgba_transfer_ops(ctx, transferOps, width, rgbaFloat);
float_span_to_chan(width, (CONST GLfloat (*)[4]) rgbaFloat,
span.array->rgba);
}
/* Write color span */
if (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) {
drawRb->PutRow(ctx, drawRb, width, destx, dy, span.array->rgba, NULL);
}
else {
span.x = destx;
span.y = dy;
span.end = width;
if (zoom) {
_swrast_write_zoomed_rgba_span(ctx, destx, desty, &span,
(CONST GLchan (*)[4]) span.array->rgba);
}
else {
_swrast_write_rgba_span(ctx, &span);
}
}
}
if (overlapping)
_mesa_free(tmpImage);
}
/*
* RGBA copypixels with convolution.
*/
static void
copy_conv_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
GLint width, GLint height, GLint destx, GLint desty)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
struct gl_renderbuffer *drawRb = NULL;
GLboolean quick_draw;
GLint row;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
const GLuint transferOps = ctx->_ImageTransferState;
GLfloat *dest, *tmpImage, *convImage;
struct sw_span span;
INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
if (ctx->Depth.Test)
_swrast_span_default_z(ctx, &span);
if (swrast->_FogEnabled)
_swrast_span_default_fog(ctx, &span);
if (SWRAST_CONTEXT(ctx)->_RasterMask == 0
&& !zoom
&& destx >= 0
&& destx + width <= (GLint) ctx->DrawBuffer->Width) {
quick_draw = GL_TRUE;
drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
}
else {
quick_draw = GL_FALSE;
}
/* allocate space for GLfloat image */
tmpImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
if (!tmpImage) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
return;
}
convImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
if (!convImage) {
_mesa_free(tmpImage);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
return;
}
/* read source image */
dest = tmpImage;
for (row = 0; row < height; row++) {
GLchan rgba[MAX_WIDTH][4];
/* Read GLchan and convert to GLfloat */
_swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer,
width, srcx, srcy + row, rgba);
chan_span_to_float(width, (CONST GLchan (*)[4]) rgba,
(GLfloat (*)[4]) dest);
dest += 4 * width;
}
/* do the image transfer ops which preceed convolution */
for (row = 0; row < height; row++) {
GLfloat (*rgba)[4] = (GLfloat (*)[4]) (tmpImage + row * width * 4);
_mesa_apply_rgba_transfer_ops(ctx,
transferOps & IMAGE_PRE_CONVOLUTION_BITS,
width, rgba);
}
/* do convolution */
if (ctx->Pixel.Convolution2DEnabled) {
_mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage);
}
else {
ASSERT(ctx->Pixel.Separable2DEnabled);
_mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage);
}
_mesa_free(tmpImage);
/* do remaining post-convolution image transfer ops */
for (row = 0; row < height; row++) {
GLfloat (*rgba)[4] = (GLfloat (*)[4]) (convImage + row * width * 4);
_mesa_apply_rgba_transfer_ops(ctx,
transferOps & IMAGE_POST_CONVOLUTION_BITS,
width, rgba);
}
/* write the new image */
for (row = 0; row < height; row++) {
const GLfloat *src = convImage + row * width * 4;
GLint dy;
/* convert floats back to chan */
float_span_to_chan(width, (const GLfloat (*)[4]) src, span.array->rgba);
/* write row to framebuffer */
dy = desty + row;
if (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) {
drawRb->PutRow(ctx, drawRb, width, destx, dy, span.array->rgba, NULL);
}
else {
span.x = destx;
span.y = dy;
span.end = width;
if (zoom) {
_swrast_write_zoomed_rgba_span(ctx, destx, desty, &span,
(CONST GLchan (*)[4])span.array->rgba);
}
else {
_swrast_write_rgba_span(ctx, &span);
}
}
}
_mesa_free(convImage);
}
/**
* RGBA copypixels with convolution.
*/
static void
copy_conv_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
GLint width, GLint height, GLint destx, GLint desty)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLint row;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
const GLbitfield transferOps = ctx->_ImageTransferState;
const GLboolean sink = (ctx->Pixel.MinMaxEnabled && ctx->MinMax.Sink)
|| (ctx->Pixel.HistogramEnabled && ctx->Histogram.Sink);
GLfloat *dest, *tmpImage, *convImage;
SWspan span;
INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
if (ctx->Depth.Test)
_swrast_span_default_z(ctx, &span);
if (swrast->_FogEnabled)
_swrast_span_default_fog(ctx, &span);
_swrast_span_default_secondary_color(ctx, &span);
/* allocate space for GLfloat image */
tmpImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
if (!tmpImage) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
return;
}
convImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
if (!convImage) {
_mesa_free(tmpImage);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
return;
}
/* read source image as float/RGBA */
dest = tmpImage;
for (row = 0; row < height; row++) {
_swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer,
width, srcx, srcy + row, GL_FLOAT, dest);
dest += 4 * width;
}
/* do the image transfer ops which preceed convolution */
for (row = 0; row < height; row++) {
GLfloat (*rgba)[4] = (GLfloat (*)[4]) (tmpImage + row * width * 4);
_mesa_apply_rgba_transfer_ops(ctx,
transferOps & IMAGE_PRE_CONVOLUTION_BITS,
width, rgba);
}
/* do convolution */
if (ctx->Pixel.Convolution2DEnabled) {
_mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage);
}
else {
ASSERT(ctx->Pixel.Separable2DEnabled);
_mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage);
}
_mesa_free(tmpImage);
/* do remaining post-convolution image transfer ops */
for (row = 0; row < height; row++) {
GLfloat (*rgba)[4] = (GLfloat (*)[4]) (convImage + row * width * 4);
_mesa_apply_rgba_transfer_ops(ctx,
transferOps & IMAGE_POST_CONVOLUTION_BITS,
width, rgba);
}
if (!sink) {
/* write the new image */
for (row = 0; row < height; row++) {
const GLfloat *src = convImage + row * width * 4;
GLvoid *rgba = (GLvoid *) span.array->attribs[FRAG_ATTRIB_COL0];
/* copy convolved colors into span array */
_mesa_memcpy(rgba, src, width * 4 * sizeof(GLfloat));
/* write span */
span.x = destx;
span.y = desty + row;
span.end = width;
span.array->ChanType = GL_FLOAT;
if (zoom) {
_swrast_write_zoomed_rgba_span(ctx, destx, desty, &span, rgba);
}
else {
_swrast_write_rgba_span(ctx, &span);
}
}
/* restore this */
span.array->ChanType = CHAN_TYPE;
}
_mesa_free(convImage);
}
/**
* RGBA copypixels
*/
static void
copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
GLint width, GLint height, GLint destx, GLint desty)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLfloat *tmpImage, *p;
GLint sy, dy, stepy, row;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
GLint overlapping;
GLuint transferOps = ctx->_ImageTransferState;
SWspan span;
if (!ctx->ReadBuffer->_ColorReadBuffer) {
/* no readbuffer - OK */
return;
}
if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
copy_conv_rgba_pixels(ctx, srcx, srcy, width, height, destx, desty);
return;
}
else if (ctx->Pixel.Convolution1DEnabled) {
/* make sure we don't apply 1D convolution */
transferOps &= ~(IMAGE_CONVOLUTION_BIT |
IMAGE_POST_CONVOLUTION_SCALE_BIAS);
}
if (ctx->DrawBuffer == ctx->ReadBuffer) {
overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
}
else {
overlapping = GL_FALSE;
}
/* Determine if copy should be done bottom-to-top or top-to-bottom */
if (!overlapping && srcy < desty) {
/* top-down max-to-min */
sy = srcy + height - 1;
dy = desty + height - 1;
stepy = -1;
}
else {
/* bottom-up min-to-max */
sy = srcy;
dy = desty;
stepy = 1;
}
INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
if (ctx->Depth.Test)
_swrast_span_default_z(ctx, &span);
if (swrast->_FogEnabled)
_swrast_span_default_fog(ctx, &span);
_swrast_span_default_secondary_color(ctx, &span);
if (overlapping) {
tmpImage = (GLfloat *) _mesa_malloc(width * height * sizeof(GLfloat) * 4);
if (!tmpImage) {
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
}
/* read the source image as RGBA/float */
p = tmpImage;
for (row = 0; row < height; row++) {
_swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
width, srcx, sy + row, GL_FLOAT, p );
p += width * 4;
}
p = tmpImage;
}
else {
tmpImage = NULL; /* silence compiler warnings */
p = NULL;
}
ASSERT(width < MAX_WIDTH);
for (row = 0; row < height; row++, sy += stepy, dy += stepy) {
GLvoid *rgba = span.array->attribs[FRAG_ATTRIB_COL0];
/* Get row/span of source pixels */
if (overlapping) {
/* get from buffered image */
_mesa_memcpy(rgba, p, width * sizeof(GLfloat) * 4);
p += width * 4;
}
else {
/* get from framebuffer */
_swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
width, srcx, sy, GL_FLOAT, rgba );
}
if (transferOps) {
_mesa_apply_rgba_transfer_ops(ctx, transferOps, width,
(GLfloat (*)[4]) rgba);
}
/* Write color span */
span.x = destx;
span.y = dy;
span.end = width;
span.array->ChanType = GL_FLOAT;
if (zoom) {
_swrast_write_zoomed_rgba_span(ctx, destx, desty, &span, rgba);
}
else {
_swrast_write_rgba_span(ctx, &span);
}
}
span.array->ChanType = CHAN_TYPE; /* restore */
if (overlapping)
_mesa_free(tmpImage);
}
/**
* RGBA copypixels
*/
static void
copy_rgba_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
GLint width, GLint height, GLint destx, GLint desty)
{
GLfloat *tmpImage, *p;
GLint sy, dy, stepy, row;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
GLint overlapping;
GLuint transferOps = ctx->_ImageTransferState;
SWspan span;
if (!ctx->ReadBuffer->_ColorReadBuffer) {
/* no readbuffer - OK */
return;
}
if (ctx->DrawBuffer == ctx->ReadBuffer) {
overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
}
else {
overlapping = GL_FALSE;
}
/* Determine if copy should be done bottom-to-top or top-to-bottom */
if (!overlapping && srcy < desty) {
/* top-down max-to-min */
sy = srcy + height - 1;
dy = desty + height - 1;
stepy = -1;
}
else {
/* bottom-up min-to-max */
sy = srcy;
dy = desty;
stepy = 1;
}
INIT_SPAN(span, GL_BITMAP);
_swrast_span_default_attribs(ctx, &span);
span.arrayMask = SPAN_RGBA;
span.arrayAttribs = VARYING_BIT_COL0; /* we'll fill in COL0 attrib values */
if (overlapping) {
tmpImage = malloc(width * height * sizeof(GLfloat) * 4);
if (!tmpImage) {
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
}
/* read the source image as RGBA/float */
p = tmpImage;
for (row = 0; row < height; row++) {
_swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
width, srcx, sy + row, p );
p += width * 4;
}
p = tmpImage;
}
else {
tmpImage = NULL; /* silence compiler warnings */
p = NULL;
}
ASSERT(width < SWRAST_MAX_WIDTH);
for (row = 0; row < height; row++, sy += stepy, dy += stepy) {
GLvoid *rgba = span.array->attribs[VARYING_SLOT_COL0];
/* Get row/span of source pixels */
if (overlapping) {
/* get from buffered image */
memcpy(rgba, p, width * sizeof(GLfloat) * 4);
p += width * 4;
}
else {
/* get from framebuffer */
_swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
width, srcx, sy, rgba );
}
if (transferOps) {
_mesa_apply_rgba_transfer_ops(ctx, transferOps, width,
(GLfloat (*)[4]) rgba);
}
/* Write color span */
span.x = destx;
span.y = dy;
span.end = width;
span.array->ChanType = GL_FLOAT;
if (zoom) {
_swrast_write_zoomed_rgba_span(ctx, destx, desty, &span, rgba);
}
else {
_swrast_write_rgba_span(ctx, &span);
}
}
span.array->ChanType = CHAN_TYPE; /* restore */
if (overlapping)
free(tmpImage);
}