Zoomed DrawPixels of packed depth/stencil works now.
if (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) {
drawRb->PutRow(ctx, drawRb, width, destx, dy, span.array->rgba, NULL);
}
- else if (zoom) {
- span.x = destx;
- span.y = dy;
- span.end = width;
- _swrast_write_zoomed_rgba_span(ctx, &span,
- (CONST GLchan (*)[4])span.array->rgba,
- desty, 0);
- }
else {
span.x = destx;
span.y = dy;
span.end = width;
- _swrast_write_rgba_span(ctx, &span);
+ 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 (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) {
drawRb->PutRow(ctx, drawRb, width, destx, dy, span.array->rgba, NULL);
}
- else if (zoom) {
- span.x = destx;
- span.y = dy;
- span.end = width;
- _swrast_write_zoomed_rgba_span(ctx, &span,
- (CONST GLchan (*)[4]) span.array->rgba,
- desty, 0);
- }
else {
span.x = destx;
span.y = dy;
span.end = width;
- _swrast_write_rgba_span(ctx, &span);
+ if (zoom) {
+ _swrast_write_zoomed_rgba_span(ctx, destx, desty, &span,
+ (CONST GLchan (*)[4]) span.array->rgba);
+ }
+ else {
+ _swrast_write_rgba_span(ctx, &span);
+ }
}
}
span.y = dy;
span.end = width;
if (zoom)
- _swrast_write_zoomed_index_span(ctx, &span, desty, 0);
+ _swrast_write_zoomed_index_span(ctx, destx, desty, &span);
else
_swrast_write_index_span(ctx, &span);
}
span.end = width;
if (fb->Visual.rgbMode) {
if (zoom)
- _swrast_write_zoomed_rgba_span( ctx, &span,
- (const GLchan (*)[4])span.array->rgba, desty, 0 );
+ _swrast_write_zoomed_rgba_span(ctx, destx, desty, &span,
+ (const GLchan (*)[4]) span.array->rgba);
else
_swrast_write_rgba_span(ctx, &span);
}
else {
if (zoom)
- _swrast_write_zoomed_index_span( ctx, &span, desty, 0 );
+ _swrast_write_zoomed_index_span(ctx, destx, desty, &span);
else
_swrast_write_index_span(ctx, &span);
}
/* Write stencil values */
if (zoom) {
- _swrast_write_zoomed_stencil_span( ctx, width, destx, dy,
- stencil, desty, 0 );
+ _swrast_write_zoomed_stencil_span(ctx, destx, desty, width,
+ destx, dy, stencil);
}
else {
_swrast_write_stencil_span( ctx, width, destx, dy, stencil );
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels)
{
+ const GLint imgX = x, imgY = y;
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
SWcontext *swrast = SWRAST_CONTEXT(ctx);
struct sw_span span;
&& !unpack->SwapBytes
&& !unpack->LsbFirst) {
+ /* XXX there's a lot of clipping code here that should be replaced
+ * by a call to _mesa_clip_drawpixels().
+ */
GLint destX = x;
GLint destY = y;
GLint drawWidth = width; /* actual width drawn */
GLint skipPixels = unpack->SkipPixels;
GLint skipRows = unpack->SkipRows;
GLint rowLength;
- GLint zoomY0 = 0;
if (unpack->RowLength > 0)
rowLength = unpack->RowLength;
else {
if (drawWidth > MAX_WIDTH)
return GL_FALSE; /* fall back to general case path */
-
- /* save Y value of first row */
- zoomY0 = IROUND(ctx->Current.RasterPos[1]);
}
GLint row;
for (row=0; row<drawHeight; row++) {
span.x = destX;
- span.y = destY;
+ span.y = destY + row;
span.end = drawWidth;
- _swrast_write_zoomed_rgba_span(ctx, &span,
- (CONST GLchan (*)[4]) src, zoomY0, 0);
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
+ (CONST GLchan (*)[4]) src);
src += rowLength * 4;
- destY++;
}
}
}
span.x = destX;
span.y = destY;
span.end = drawWidth;
- _swrast_write_zoomed_rgb_span(ctx, &span,
- (CONST GLchan (*)[3]) src, zoomY0, 0);
+ _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span,
+ (CONST GLchan (*)[3]) src);
src += rowLength * 3;
destY++;
}
span.x = destX;
span.y = destY;
span.end = drawWidth;
- _swrast_write_zoomed_rgb_span(ctx, &span,
- (CONST GLchan (*)[3]) span.array->rgb, zoomY0, 0);
+ _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span,
+ (CONST GLchan (*)[3]) span.array->rgb);
src += rowLength;
destY++;
}
span.x = destX;
span.y = destY;
span.end = drawWidth;
- _swrast_write_zoomed_rgba_span(ctx, &span,
- (CONST GLchan (*)[4]) span.array->rgba, zoomY0, 0);
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
+ (CONST GLchan (*)[4]) span.array->rgba);
src += rowLength*2;
destY++;
}
span.x = destX;
span.y = destY;
span.end = drawWidth;
- _swrast_write_zoomed_rgba_span(ctx, &span,
- (CONST GLchan (*)[4]) span.array->rgba, zoomY0, 0);
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
+ (CONST GLchan (*)[4]) span.array->rgba);
src += rowLength;
destY++;
}
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
+ const GLint imgX = x, imgY = y;
const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
GLint row, skipPixels;
struct sw_span span;
*/
skipPixels = 0;
while (skipPixels < width) {
- const GLint spanX = x + (zoom ? 0 : skipPixels);
- GLint spanY = y;
- const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
- ? MAX_WIDTH : (width - skipPixels);
- ASSERT(spanEnd <= MAX_WIDTH);
- for (row = 0; row < height; row++, spanY++) {
+ const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
+ ASSERT(spanWidth <= MAX_WIDTH);
+ for (row = 0; row < height; row++) {
const GLvoid *source = _mesa_image_address2d(unpack, pixels,
width, height,
GL_COLOR_INDEX, type,
row, skipPixels);
- _mesa_unpack_index_span(ctx, spanEnd, GL_UNSIGNED_INT,
+ _mesa_unpack_index_span(ctx, spanWidth, GL_UNSIGNED_INT,
span.array->index, type, source, unpack,
ctx->_ImageTransferState);
/* These may get changed during writing/clipping */
- span.x = spanX;
- span.y = spanY;
- span.end = spanEnd;
+ span.x = x + skipPixels;
+ span.y = y + row;
+ span.end = spanWidth;
if (zoom)
- _swrast_write_zoomed_index_span(ctx, &span, y, skipPixels);
+ _swrast_write_zoomed_index_span(ctx, imgX, imgY, &span);
else
_swrast_write_index_span(ctx, &span);
}
- skipPixels += spanEnd;
+ skipPixels += spanWidth;
}
}
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
- const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
- const GLint desty = y;
- GLint row, skipPixels;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
+ GLint skipPixels;
/* if width > MAX_WIDTH, have to process image in chunks */
skipPixels = 0;
while (skipPixels < width) {
- const GLint spanX = x;
- GLint spanY = y;
- const GLint spanWidth = (width - skipPixels > MAX_WIDTH)
- ? MAX_WIDTH : (width - skipPixels);
-
- for (row = 0; row < height; row++, spanY++) {
+ const GLint spanX = x + skipPixels;
+ const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
+ GLint row;
+ for (row = 0; row < height; row++) {
+ const GLint spanY = y + row;
GLstencil values[MAX_WIDTH];
GLenum destType = (sizeof(GLstencil) == sizeof(GLubyte))
? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
}
if (zoom) {
- _swrast_write_zoomed_stencil_span(ctx, (GLuint) spanWidth,
- spanX, spanY, values, desty, 0);
+ _swrast_write_zoomed_stencil_span(ctx, x, y, spanWidth,
+ spanX, spanY, values);
}
else {
_swrast_write_stencil_span(ctx, spanWidth, spanX, spanY, values);
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
- struct gl_framebuffer *fb = ctx->DrawBuffer;
- const GLboolean bias_or_scale = ctx->Pixel.DepthBias!=0.0 || ctx->Pixel.DepthScale!=1.0;
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+ const GLboolean scaleOrBias
+ = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
- const GLint desty = y;
struct sw_span span;
INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_Z);
_swrast_span_default_texcoords(ctx, &span);
if (type == GL_UNSIGNED_SHORT
- && fb->Visual.depthBits == 16
- && !bias_or_scale
+ && rb->DepthBits == 16
+ && !scaleOrBias
&& !zoom
&& ctx->Visual.rgbMode
&& width <= MAX_WIDTH) {
/* Special case: directly write 16-bit depth values */
- GLint row, spanY = y;
- for (row = 0; row < height; row++, spanY++) {
+ GLint row;
+ for (row = 0; row < height; row++) {
const GLushort *zSrc = (const GLushort *)
_mesa_image_address2d(unpack, pixels, width, height,
GL_DEPTH_COMPONENT, type, row, 0);
for (i = 0; i < width; i++)
span.array->z[i] = zSrc[i];
span.x = x;
- span.y = spanY;
+ span.y = y + row;
span.end = width;
_swrast_write_rgba_span(ctx, &span);
}
}
else if (type == GL_UNSIGNED_INT
- && !bias_or_scale
+ && !scaleOrBias
&& !zoom
&& ctx->Visual.rgbMode
&& width <= MAX_WIDTH) {
/* Special case: shift 32-bit values down to Visual.depthBits */
- const GLint shift = 32 - fb->Visual.depthBits;
- GLint row, spanY = y;
- for (row = 0; row < height; row++, spanY++) {
+ const GLint shift = 32 - rb->DepthBits;
+ GLint row;
+ for (row = 0; row < height; row++) {
const GLuint *zSrc = (const GLuint *)
_mesa_image_address2d(unpack, pixels, width, height,
GL_DEPTH_COMPONENT, type, row, 0);
span.array->z[col] = zSrc[col] >> shift;
}
span.x = x;
- span.y = spanY;
+ span.y = y + row;
span.end = width;
_swrast_write_rgba_span(ctx, &span);
}
else {
/* General case */
const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
- GLint row, skipPixels = 0;
+ GLint skipPixels = 0;
/* in case width > MAX_WIDTH do the copy in chunks */
while (skipPixels < width) {
- const GLint spanX = x + (zoom ? 0 : skipPixels);
- GLint spanY = y;
- const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
- ? MAX_WIDTH : (width - skipPixels);
+ const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
+ GLint row;
ASSERT(span.end <= MAX_WIDTH);
- for (row = 0; row < height; row++, spanY++) {
+ for (row = 0; row < height; row++) {
const GLvoid *zSrc = _mesa_image_address2d(unpack,
pixels, width, height,
GL_DEPTH_COMPONENT, type,
/* Set these for each row since the _swrast_write_* function may
* change them while clipping.
*/
- span.x = spanX;
- span.y = spanY;
- span.end = spanEnd;
+ span.x = x + skipPixels;
+ span.y = y + row;
+ span.end = spanWidth;
- _mesa_unpack_depth_span(ctx, span.end,
+ _mesa_unpack_depth_span(ctx, spanWidth,
GL_UNSIGNED_INT, span.array->z, depthMax,
type, zSrc, unpack);
if (zoom) {
- _swrast_write_zoomed_depth_span(ctx, &span, desty, skipPixels);
+ _swrast_write_zoomed_depth_span(ctx, x, y, &span);
}
else if (ctx->Visual.rgbMode) {
_swrast_write_rgba_span(ctx, &span);
_swrast_write_index_span(ctx, &span);
}
}
- skipPixels += spanEnd;
+ skipPixels += spanWidth;
}
}
}
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
+ const GLint imgX = x, imgY = y;
struct gl_renderbuffer *rb = NULL; /* only used for quickDraw path */
const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
- const GLint desty = y;
GLboolean quickDraw;
GLfloat *convImage = NULL;
GLuint transferOps = ctx->_ImageTransferState;
{
const GLbitfield interpMask = span.interpMask;
const GLbitfield arrayMask = span.arrayMask;
- GLint row, skipPixels = 0;
+ GLint skipPixels = 0;
/* if the span is wider than MAX_WIDTH we have to do it in chunks */
while (skipPixels < width) {
- const GLint spanX = x + (zoom ? 0 : skipPixels);
- GLint spanY = y;
- const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
- ? MAX_WIDTH : (width - skipPixels);
+ const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
+ GLint row;
+
ASSERT(span.end <= MAX_WIDTH);
- for (row = 0; row < height; row++, spanY++) {
+ for (row = 0; row < height; row++) {
const GLvoid *source = _mesa_image_address2d(unpack,
pixels, width, height, format, type, row, skipPixels);
/* Set these for each row since the _swrast_write_* function may
* change them while clipping.
*/
- span.x = spanX;
- span.y = spanY;
- span.end = spanEnd;
+ span.x = x + skipPixels;
+ span.y = y + row;
+ span.end = spanWidth;
span.arrayMask = arrayMask;
span.interpMask = interpMask;
- _mesa_unpack_color_span_chan(ctx, span.end, GL_RGBA,
+ _mesa_unpack_color_span_chan(ctx, spanWidth, GL_RGBA,
(GLchan *) span.array->rgba,
format, type, source, unpack,
transferOps);
span.array->rgba, NULL);
}
else if (zoom) {
- _swrast_write_zoomed_rgba_span(ctx, &span,
- (CONST GLchan (*)[4]) span.array->rgba, desty, skipPixels);
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
+ (CONST GLchan (*)[4]) span.array->rgba);
}
else {
_swrast_write_rgba_span(ctx, &span);
}
}
- skipPixels += spanEnd;
+ skipPixels += spanWidth;
}
}
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels)
{
+ const GLint imgX = x, imgY = y;
const GLfloat depthScale = ctx->DrawBuffer->_DepthMaxF;
const GLuint stencilMask = ctx->Stencil.WriteMask[0];
const GLuint stencilType = (STENCIL_BITS == 8) ?
}
}
- /* XXX need to do pixelzoom! */
+ /* XXX need to handle very wide images (skippixels) */
for (i = 0; i < height; i++) {
const GLuint *depthStencilSrc = (const GLuint *)
zValues[j] = depthStencilSrc[j] >> 8;
}
if (zoom)
- ;
+ _swrast_write_zoomed_z_span(ctx, imgX, imgY, width,
+ x, y + i, zValues);
else
depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues, NULL);
}
zValues[j] = depthStencilSrc[j] >> 16;
}
if (zoom)
- ;
+ _swrast_write_zoomed_z_span(ctx, imgX, imgY, width,
+ x, y + i, zValues);
else
depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues, NULL);
}
else {
/* general case */
- GLuint zValues[MAX_WIDTH];
+ GLuint zValues[MAX_WIDTH]; /* 16 or 32-bit Z value storage */
_mesa_unpack_depth_span(ctx, width,
depthRb->DataType, zValues, depthScale,
type, depthStencilSrc, &clippedUnpack);
- if (zoom)
- ;
- else
+ if (zoom) {
+ _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, x,
+ y + i, zValues);
+ }
+ else {
depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues, NULL);
+ }
}
}
type, depthStencilSrc, &clippedUnpack,
ctx->_ImageTransferState);
if (zoom)
- ;
+ _swrast_write_zoomed_stencil_span(ctx, imgX, imgY, width,
+ x, y + i, stencilValues);
else
_swrast_write_stencil_span(ctx, width, x, y + i, stencilValues);
}
struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
GLint i;
- if (!rb) {
- return; /* no readbuffer OK */
- }
+ ASSERT(rb);
/* width should never be > MAX_WIDTH since we did clipping earlier */
ASSERT(width <= MAX_WIDTH);
/* width should never be > MAX_WIDTH since we did clipping earlier */
ASSERT(width <= MAX_WIDTH);
- if (!rb) {
- return; /* no readbuffer OK */
- }
+ ASSERT(rb);
bias_or_scale = ctx->Pixel.DepthBias != 0.0 || ctx->Pixel.DepthScale != 1.0;
struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
GLint j;
- if (!rb) {
- /* no readbuffer - OK */
- return;
- }
+ ASSERT(rb);
/* width should never be > MAX_WIDTH since we did clipping earlier */
ASSERT(width <= MAX_WIDTH);
struct gl_framebuffer *fb = ctx->ReadBuffer;
struct gl_renderbuffer *rb = fb->_ColorReadBuffer;
- if (!rb) {
- /* No readbuffer is OK with GL_EXT_framebuffer_object */
- return;
- }
+ ASSERT(rb);
/* Try optimized path first */
if (read_fast_rgba_pixels( ctx, x, y, width, height,
#include "s_zoom.h"
-/*
- * Helper function called from _swrast_write_zoomed_rgba/rgb/index_span().
+/**
+ * Compute the bounds of the region resulting from zooming a pixel span.
+ * The resulting region will be entirely inside the window/scissor bounds
+ * so no additional clipping is needed.
+ * \param imageX, imageY position of the overall image being drawn
+ * \param spanX, spanY position of span being drawing
+ * \param x0, x1 returned X bounds of zoomed region [x0, x1)
+ * \param y0, y1 returned Y bounds of zoomed region [y0, y1)
+ * \return GL_TRUE if any zoomed pixels visible, GL_FALSE if totally clipped
+ */
+static GLboolean
+compute_zoomed_bounds(GLcontext *ctx, GLint imageX, GLint imageY,
+ GLint spanX, GLint spanY, GLint width,
+ GLint *x0, GLint *x1, GLint *y0, GLint *y1)
+{
+ const struct gl_framebuffer *fb = ctx->DrawBuffer;
+ GLint c0, c1, r0, r1;
+
+ ASSERT(spanX >= imageX);
+ ASSERT(spanY >= imageY);
+
+ /*
+ * Compute destination columns: [c0, c1)
+ */
+ c0 = imageX + (GLint) ((spanX - imageX) * ctx->Pixel.ZoomX);
+ c1 = imageX + (GLint) ((spanX + width - imageX) * ctx->Pixel.ZoomX);
+ if (c1 < c0) {
+ /* swap */
+ GLint tmp = c1;
+ c1 = c0;
+ c0 = tmp;
+ }
+ c0 = CLAMP(c0, fb->_Xmin, fb->_Xmax);
+ c1 = CLAMP(c1, fb->_Xmin, fb->_Xmax);
+ if (c0 == c1) {
+ return GL_FALSE; /* no width */
+ }
+
+ /*
+ * Compute destination rows: [r0, r1)
+ */
+ r0 = imageY + (GLint) ((spanY - imageY) * ctx->Pixel.ZoomY);
+ r1 = imageY + (GLint) ((spanY + 1 - imageY) * ctx->Pixel.ZoomY);
+ if (r1 < r0) {
+ /* swap */
+ GLint tmp = r1;
+ r1 = r0;
+ r0 = tmp;
+ }
+ r0 = CLAMP(r0, fb->_Ymin, fb->_Ymax);
+ r1 = CLAMP(r1, fb->_Ymin, fb->_Ymax);
+ if (r0 == r1) {
+ return GL_FALSE; /* no height */
+ }
+
+ *x0 = c0;
+ *x1 = c1;
+ *y0 = r0;
+ *y1 = r1;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Can use this for unzooming X or Y values.
+ */
+static INLINE GLint
+unzoom_x(GLfloat zoomX, GLint imageX, GLint zx)
+{
+ /*
+ zx = imageX + (x - imageX) * zoomX;
+ zx - imageX = (x - imageX) * zoomX;
+ (zx - imageX) / zoomX = x - imageX;
+ */
+ GLint x = imageX + (GLint) ((zx - imageX) / zoomX);
+ return x;
+}
+
+
+
+/**
+ * Helper function called from _swrast_write_zoomed_rgba/rgb/
+ * index/depth_span().
*/
static void
-zoom_span( GLcontext *ctx, const struct sw_span *span,
- const GLvoid *src, GLint y0, GLenum format, GLint skipPixels )
+zoom_span( GLcontext *ctx, GLint imgX, GLint imgY, const struct sw_span *span,
+ const GLvoid *src, GLenum format )
{
- GLint r0, r1, row;
- GLint c0, c1, skipCol;
- GLint i, j;
- const GLuint maxWidth = MIN2( ctx->DrawBuffer->Width, MAX_WIDTH );
struct sw_span zoomed;
struct span_arrays zoomed_arrays; /* this is big! */
+ GLint x0, x1, y0, y1;
+ GLint zoomedWidth;
+
+ if (!compute_zoomed_bounds(ctx, imgX, imgY, span->x, span->y, span->end,
+ &x0, &x1, &y0, &y1)) {
+ return; /* totally clipped */
+ }
+
+ zoomedWidth = x1 - x0;
+ ASSERT(zoomedWidth > 0);
+ ASSERT(zoomedWidth <= MAX_WIDTH);
/* no pixel arrays! must be horizontal spans. */
ASSERT((span->arrayMask & SPAN_XY) == 0);
ASSERT(span->primitive == GL_BITMAP);
INIT_SPAN(zoomed, GL_BITMAP, 0, 0, 0);
+ zoomed.x = x0;
+ zoomed.end = zoomedWidth;
zoomed.array = &zoomed_arrays;
/* copy fog interp info */
/* we'll generate an array of colorss */
zoomed.interpMask = span->interpMask & ~SPAN_RGBA;
zoomed.arrayMask |= SPAN_RGBA;
+ ASSERT(span->arrayMask & SPAN_RGBA);
}
else if (format == GL_COLOR_INDEX) {
/* copy Z info */
/* we'll generate an array of color indexes */
zoomed.interpMask = span->interpMask & ~SPAN_INDEX;
zoomed.arrayMask |= SPAN_INDEX;
+ ASSERT(span->arrayMask & SPAN_INDEX);
}
else if (format == GL_DEPTH_COMPONENT) {
/* Copy color info */
/* we'll generate an array of depth values */
zoomed.interpMask = span->interpMask & ~SPAN_Z;
zoomed.arrayMask |= SPAN_Z;
- }
- else if (format == GL_DEPTH_COMPONENT16 ||
- format == GL_DEPTH_COMPONENT32) {
- /* writing Z values directly to depth buffer, bypassing fragment ops */
+ ASSERT(span->arrayMask & SPAN_Z);
}
else {
_mesa_problem(ctx, "Bad format in zoom_span");
return;
}
- /*
- * Compute which columns to draw: [c0, c1)
- */
- c0 = (GLint) (span->x + skipPixels * ctx->Pixel.ZoomX);
- c1 = (GLint) (span->x + (skipPixels + span->end) * ctx->Pixel.ZoomX);
- if (c0 == c1) {
- return;
- }
- else if (c1 < c0) {
- /* swap */
- GLint ctmp = c1;
- c1 = c0;
- c0 = ctmp;
- }
- if (c0 < 0) {
- zoomed.x = 0;
- zoomed.start = 0;
- zoomed.end = c1;
- skipCol = -c0;
- }
- else {
- zoomed.x = c0;
- zoomed.start = 0;
- zoomed.end = c1 - c0;
- skipCol = 0;
- }
- if (zoomed.end > maxWidth)
- zoomed.end = maxWidth;
-
- /*
- * Compute which rows to draw: [r0, r1)
- */
- row = span->y - y0;
- r0 = y0 + (GLint) (row * ctx->Pixel.ZoomY);
- r1 = y0 + (GLint) ((row+1) * ctx->Pixel.ZoomY);
- if (r0 == r1) {
- return;
- }
- else if (r1 < r0) {
- /* swap */
- GLint rtmp = r1;
- r1 = r0;
- r0 = rtmp;
- }
-
- ASSERT(r0 < r1);
- ASSERT(c0 < c1);
-
- /*
- * Trivial clip rejection testing.
- */
- if (r1 < 0) /* below window */
- return;
- if (r0 >= (GLint) ctx->DrawBuffer->Height) /* above window */
- return;
- if (c1 < 0) /* left of window */
- return;
- if (c0 >= (GLint) ctx->DrawBuffer->Width) /* right of window */
- return;
-
/* zoom the span horizontally */
if (format == GL_RGBA) {
const GLchan (*rgba)[4] = (const GLchan (*)[4]) src;
- if (ctx->Pixel.ZoomX == -1.0F) {
- /* common case */
- for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
- i = span->end - (j + skipCol) - 1;
- COPY_CHAN4(zoomed.array->rgba[j], rgba[i]);
- }
- }
- else {
- /* general solution */
- const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
- for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
- i = (GLint) ((j + skipCol) * xscale);
- if (ctx->Pixel.ZoomX < 0.0) {
- ASSERT(i <= 0);
- i = span->end + i - 1;
- }
- ASSERT(i >= 0);
- ASSERT(i < (GLint) span->end);
- COPY_CHAN4(zoomed.array->rgba[j], rgba[i]);
- }
+ GLint i;
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x;
+ ASSERT(j >= 0);
+ ASSERT(j < span->end);
+ COPY_CHAN4(zoomed.array->rgba[i], rgba[j]);
}
}
else if (format == GL_RGB) {
const GLchan (*rgb)[3] = (const GLchan (*)[3]) src;
- if (ctx->Pixel.ZoomX == -1.0F) {
- /* common case */
- for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
- i = span->end - (j + skipCol) - 1;
- zoomed.array->rgba[j][0] = rgb[i][0];
- zoomed.array->rgba[j][1] = rgb[i][1];
- zoomed.array->rgba[j][2] = rgb[i][2];
- zoomed.array->rgba[j][3] = CHAN_MAX;
- }
- }
- else {
- /* general solution */
- const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
- for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
- i = (GLint) ((j + skipCol) * xscale);
- if (ctx->Pixel.ZoomX < 0.0) {
- ASSERT(i <= 0);
- i = span->end + i - 1;
- }
- ASSERT(i >= 0);
- ASSERT(i < (GLint) span->end);
- zoomed.array->rgba[j][0] = rgb[i][0];
- zoomed.array->rgba[j][1] = rgb[i][1];
- zoomed.array->rgba[j][2] = rgb[i][2];
- zoomed.array->rgba[j][3] = CHAN_MAX;
- }
+ GLint i;
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x;
+ ASSERT(j >= 0);
+ ASSERT(j < span->end);
+ zoomed.array->rgba[i][0] = rgb[j][0];
+ zoomed.array->rgba[i][1] = rgb[j][1];
+ zoomed.array->rgba[i][2] = rgb[j][2];
+ zoomed.array->rgba[i][3] = CHAN_MAX;
}
}
else if (format == GL_COLOR_INDEX) {
const GLuint *indexes = (const GLuint *) src;
- if (ctx->Pixel.ZoomX == -1.0F) {
- /* common case */
- for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
- i = span->end - (j + skipCol) - 1;
- zoomed.array->index[j] = indexes[i];
- }
- }
- else {
- /* general solution */
- const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
- for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
- i = (GLint) ((j + skipCol) * xscale);
- if (ctx->Pixel.ZoomX < 0.0) {
- ASSERT(i <= 0);
- i = span->end + i - 1;
- }
- ASSERT(i >= 0);
- ASSERT(i < (GLint) span->end);
- zoomed.array->index[j] = indexes[i];
- }
+ GLint i;
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x;
+ ASSERT(j >= 0);
+ ASSERT(j < span->end);
+ zoomed.array->index[i] = indexes[j];
}
}
else if (format == GL_DEPTH_COMPONENT) {
const GLuint *zValues = (const GLuint *) src;
- if (ctx->Pixel.ZoomX == -1.0F) {
- /* common case */
- for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
- i = span->end - (j + skipCol) - 1;
- zoomed.array->z[j] = zValues[i];
- }
- }
- else {
- /* general solution */
- const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
- for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
- i = (GLint) ((j + skipCol) * xscale);
- if (ctx->Pixel.ZoomX < 0.0) {
- ASSERT(i <= 0);
- i = span->end + i - 1;
- }
- ASSERT(i >= 0);
- ASSERT(i < (GLint) span->end);
- zoomed.array->z[j] = zValues[i];
- }
+ GLint i;
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - span->x;
+ ASSERT(j >= 0);
+ ASSERT(j < span->end);
+ zoomed.array->z[i] = zValues[j];
}
/* Now, fall into either the RGB or COLOR_INDEX path below */
- if (ctx->Visual.rgbMode)
- format = GL_RGBA;
- else
- format = GL_COLOR_INDEX;
- }
- else if (format == GL_DEPTH_COMPONENT32) {
- /* 32-bit Z values */
- struct gl_renderbuffer *rb
- = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
- const GLuint *zSrc32 = (const GLuint *) src;
- GLuint zDst32[MAX_WIDTH];
- const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
- for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
- i = (GLint) ((j + skipCol) * xscale);
- if (ctx->Pixel.ZoomX < 0.0) {
- ASSERT(i <= 0);
- i = span->end + i - 1;
- }
- ASSERT(i >= 0);
- ASSERT(i < (GLint) span->end);
- zDst32[j] = zSrc32[i];
- }
- rb->PutRow(ctx, rb, zoomed.end, zoomed.x, zoomed.y, zDst32, NULL);
- return;
+ format = ctx->Visual.rgbMode ? GL_RGBA : GL_COLOR_INDEX;
}
/* write the span in rows [r0, r1) */
*/
GLchan rgbaSave[MAX_WIDTH][4];
const GLint end = zoomed.end; /* save */
- if (r1 - r0 > 1) {
+ if (y1 - y0 > 1) {
MEMCPY(rgbaSave, zoomed.array->rgba, zoomed.end * 4 * sizeof(GLchan));
}
- for (zoomed.y = r0; zoomed.y < r1; zoomed.y++) {
+ for (zoomed.y = y0; zoomed.y < y1; zoomed.y++) {
_swrast_write_rgba_span(ctx, &zoomed);
zoomed.end = end; /* restore */
- if (r1 - r0 > 1) {
+ if (y1 - y0 > 1) {
/* restore the colors */
MEMCPY(zoomed.array->rgba, rgbaSave, zoomed.end*4 * sizeof(GLchan));
}
else if (format == GL_COLOR_INDEX) {
GLuint indexSave[MAX_WIDTH];
const GLint end = zoomed.end; /* save */
- if (r1 - r0 > 1) {
+ if (y1 - y0 > 1) {
MEMCPY(indexSave, zoomed.array->index, zoomed.end * sizeof(GLuint));
}
- for (zoomed.y = r0; zoomed.y < r1; zoomed.y++) {
+ for (zoomed.y = y0; zoomed.y < y1; zoomed.y++) {
_swrast_write_index_span(ctx, &zoomed);
zoomed.end = end; /* restore */
- if (r1 - r0 > 1) {
+ if (y1 - y0 > 1) {
/* restore the colors */
MEMCPY(zoomed.array->index, indexSave, zoomed.end * sizeof(GLuint));
}
void
-_swrast_write_zoomed_rgba_span( GLcontext *ctx, const struct sw_span *span,
- CONST GLchan rgba[][4], GLint y0,
- GLint skipPixels )
+_swrast_write_zoomed_rgba_span( GLcontext *ctx, GLint imgX, GLint imgY,
+ const struct sw_span *span,
+ CONST GLchan rgba[][4])
{
- zoom_span(ctx, span, (const GLvoid *) rgba, y0, GL_RGBA, skipPixels);
+ zoom_span(ctx, imgX, imgY, span, (const GLvoid *) rgba, GL_RGBA);
}
void
-_swrast_write_zoomed_rgb_span( GLcontext *ctx, const struct sw_span *span,
- CONST GLchan rgb[][3], GLint y0,
- GLint skipPixels )
+_swrast_write_zoomed_rgb_span(GLcontext *ctx, GLint imgX, GLint imgY,
+ const struct sw_span *span,
+ CONST GLchan rgb[][3])
{
- zoom_span(ctx, span, (const GLvoid *) rgb, y0, GL_RGB, skipPixels);
+ zoom_span(ctx, imgX, imgY, span, (const GLvoid *) rgb, GL_RGB);
}
void
-_swrast_write_zoomed_index_span( GLcontext *ctx, const struct sw_span *span,
- GLint y0, GLint skipPixels )
+_swrast_write_zoomed_index_span(GLcontext *ctx, GLint imgX, GLint imgY,
+ const struct sw_span *span)
{
- zoom_span(ctx, span, (const GLvoid *) span->array->index, y0,
- GL_COLOR_INDEX, skipPixels);
+ zoom_span(ctx, imgX, imgY, span,
+ (const GLvoid *) span->array->index, GL_COLOR_INDEX);
}
void
-_swrast_write_zoomed_depth_span( GLcontext *ctx, const struct sw_span *span,
- GLint y0, GLint skipPixels )
+_swrast_write_zoomed_depth_span(GLcontext *ctx, GLint imgX, GLint imgY,
+ const struct sw_span *span)
{
- zoom_span(ctx, span, (const GLvoid *) span->array->z, y0,
- GL_DEPTH_COMPONENT, skipPixels);
+ zoom_span(ctx, imgX, imgY, span,
+ (const GLvoid *) span->array->z, GL_DEPTH_COMPONENT);
}
-/*
- * As above, but write stencil values.
+/**
+ * Zoom/write stencil values.
+ * No per-fragment operations are applied.
*/
void
-_swrast_write_zoomed_stencil_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y,
- const GLstencil stencil[], GLint y0,
- GLint skipPixels )
+_swrast_write_zoomed_stencil_span(GLcontext *ctx, GLint imgX, GLint imgY,
+ GLint width, GLint spanX, GLint spanY,
+ const GLstencil stencil[])
{
- GLint m;
- GLint r0, r1, row, r;
- GLint i, j, skipcol;
- GLstencil zstencil[MAX_WIDTH]; /* zoomed stencil values */
- GLint maxwidth = MIN2( ctx->DrawBuffer->Width, MAX_WIDTH );
-
- (void) skipPixels; /* XXX this shouldn't be ignored */
+ GLstencil zoomedVals[MAX_WIDTH];
+ GLint x0, x1, y0, y1, y;
+ GLint i, zoomedWidth;
- /* compute width of output row */
- m = (GLint) FABSF( n * ctx->Pixel.ZoomX );
- if (m==0) {
- return;
- }
- if (ctx->Pixel.ZoomX<0.0) {
- /* adjust x coordinate for left/right mirroring */
- x = x - m;
+ if (!compute_zoomed_bounds(ctx, imgX, imgY, spanX, spanY, width,
+ &x0, &x1, &y0, &y1)) {
+ return; /* totally clipped */
}
- /* compute which rows to draw */
- row = y - y0;
- r0 = y0 + (GLint) (row * ctx->Pixel.ZoomY);
- r1 = y0 + (GLint) ((row+1) * ctx->Pixel.ZoomY);
- if (r0==r1) {
- return;
- }
- else if (r1<r0) {
- GLint rtmp = r1;
- r1 = r0;
- r0 = rtmp;
- }
+ zoomedWidth = x1 - x0;
+ ASSERT(zoomedWidth > 0);
+ ASSERT(zoomedWidth <= MAX_WIDTH);
- /* return early if r0...r1 is above or below window */
- if (r0<0 && r1<0) {
- /* below window */
- return;
- }
- if (r0 >= (GLint) ctx->DrawBuffer->Height &&
- r1 >= (GLint) ctx->DrawBuffer->Height) {
- /* above window */
- return;
+ /* zoom the span horizontally */
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX;
+ ASSERT(j >= 0);
+ ASSERT(j < width);
+ zoomedVals[i] = stencil[j];
}
- /* check if left edge is outside window */
- skipcol = 0;
- if (x<0) {
- skipcol = -x;
- m += x;
- }
- /* make sure span isn't too long or short */
- if (m>maxwidth) {
- m = maxwidth;
+ /* write the zoomed spans */
+ for (y = y0; y < y1; y++) {
+ _swrast_write_stencil_span(ctx, zoomedWidth, x0, y, zoomedVals);
}
- else if (m<=0) {
- return;
+}
+
+
+/**
+ * Zoom/write z values (16 or 32-bit).
+ * No per-fragment operations are applied.
+ */
+void
+_swrast_write_zoomed_z_span(GLcontext *ctx, GLint imgX, GLint imgY,
+ GLint width, GLint spanX, GLint spanY,
+ const GLvoid *z)
+{
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+ GLushort zoomedVals16[MAX_WIDTH];
+ GLuint zoomedVals32[MAX_WIDTH];
+ GLint x0, x1, y0, y1, y;
+ GLint i, zoomedWidth;
+
+ if (!compute_zoomed_bounds(ctx, imgX, imgY, spanX, spanY, width,
+ &x0, &x1, &y0, &y1)) {
+ return; /* totally clipped */
}
- ASSERT( m <= MAX_WIDTH );
+ zoomedWidth = x1 - x0;
+ ASSERT(zoomedWidth > 0);
+ ASSERT(zoomedWidth <= MAX_WIDTH);
/* zoom the span horizontally */
- if (ctx->Pixel.ZoomX==-1.0F) {
- /* n==m */
- for (j=0;j<m;j++) {
- i = n - (j+skipcol) - 1;
- zstencil[j] = stencil[i];
+ if (rb->DataType == GL_UNSIGNED_SHORT) {
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX;
+ ASSERT(j >= 0);
+ ASSERT(j < width);
+ zoomedVals16[i] = ((GLushort *) z)[j];
}
+ z = zoomedVals16;
}
else {
- GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
- for (j=0;j<m;j++) {
- i = (GLint) ((j+skipcol) * xscale);
- if (i<0) i = n + i - 1;
- zstencil[j] = stencil[i];
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ for (i = 0; i < zoomedWidth; i++) {
+ GLint j = unzoom_x(ctx->Pixel.ZoomX, imgX, x0 + i) - spanX;
+ ASSERT(j >= 0);
+ ASSERT(j < width);
+ zoomedVals32[i] = ((GLuint *) z)[j];
}
+ z = zoomedVals32;
}
- /* write the span */
- for (r=r0; r<r1; r++) {
- _swrast_write_stencil_span( ctx, m, x+skipcol, r, zstencil );
+ /* write the zoomed spans */
+ for (y = y0; y < y1; y++) {
+ rb->PutRow(ctx, rb, zoomedWidth, x0, y, z, NULL);
}
}
/*
* Mesa 3-D graphics library
- * Version: 5.1
+ * Version: 6.5
*
- * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2005 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"),
#include "mtypes.h"
#include "swrast.h"
+
extern void
-_swrast_write_zoomed_rgba_span( GLcontext *ctx, const struct sw_span *span,
- CONST GLchan rgb[][4], GLint y0,
- GLint skipPixels );
+_swrast_write_zoomed_rgba_span(GLcontext *ctx, GLint imgX, GLint imgY,
+ const struct sw_span *span,
+ CONST GLchan rgb[][4]);
extern void
-_swrast_write_zoomed_rgb_span( GLcontext *ctx, const struct sw_span *span,
- CONST GLchan rgb[][3], GLint y0,
- GLint skipPixels );
+_swrast_write_zoomed_rgb_span(GLcontext *ctx, GLint imgX, GLint imgY,
+ const struct sw_span *span,
+ CONST GLchan rgb[][3]);
extern void
-_swrast_write_zoomed_index_span( GLcontext *ctx, const struct sw_span *span,
- GLint y0, GLint skipPixels );
+_swrast_write_zoomed_index_span(GLcontext *ctx, GLint imgX, GLint imgY,
+ const struct sw_span *span);
extern void
-_swrast_write_zoomed_depth_span( GLcontext *ctx, const struct sw_span *span,
- GLint y0, GLint skipPixels );
+_swrast_write_zoomed_depth_span(GLcontext *ctx, GLint imgX, GLint imgY,
+ const struct sw_span *span);
+
extern void
-_swrast_write_zoomed_stencil_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
- const GLstencil stencil[], GLint y0,
- GLint skipPixels );
+_swrast_write_zoomed_stencil_span(GLcontext *ctx, GLint imgX, GLint imgY,
+ GLint width, GLint spanX, GLint spanY,
+ const GLstencil stencil[]);
+
+extern void
+_swrast_write_zoomed_z_span(GLcontext *ctx, GLint imgX, GLint imgY,
+ GLint width, GLint spanX, GLint spanY,
+ const GLvoid *z);
+
#endif
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