aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c
diff options
context:
space:
mode:
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c')
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c428
1 files changed, 0 insertions, 428 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c
deleted file mode 100644
index b67a29701..000000000
--- a/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c
+++ /dev/null
@@ -1,428 +0,0 @@
-
-/*
- * Mesa 3-D graphics library
- * Version: 5.1
- *
- * Copyright (C) 1999-2003 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
- * BRIAN PAUL 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.
- */
-
-#include "glheader.h"
-#include "macros.h"
-#include "imports.h"
-#include "colormac.h"
-
-#include "s_context.h"
-#include "s_span.h"
-#include "s_stencil.h"
-#include "s_zoom.h"
-
-
-/*
- * Helper function called from _swrast_write_zoomed_rgba/rgb/index_span().
- */
-static void
-zoom_span( GLcontext *ctx, const struct sw_span *span,
- const GLvoid *src, GLint y0, GLenum format, GLint skipPixels )
-{
- 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! */
-
- /* 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.array = &zoomed_arrays;
-
- /* copy fog interp info */
- zoomed.fog = span->fog;
- zoomed.fogStep = span->fogStep;
- /* XXX copy texcoord info? */
-
- if (format == GL_RGBA || format == GL_RGB) {
- /* copy Z info */
- zoomed.z = span->z;
- zoomed.zStep = span->zStep;
- /* we'll generate an array of colorss */
- zoomed.interpMask = span->interpMask & ~SPAN_RGBA;
- zoomed.arrayMask |= SPAN_RGBA;
- }
- else if (format == GL_COLOR_INDEX) {
- /* copy Z info */
- zoomed.z = span->z;
- zoomed.zStep = span->zStep;
- /* we'll generate an array of color indexes */
- zoomed.interpMask = span->interpMask & ~SPAN_INDEX;
- zoomed.arrayMask |= SPAN_INDEX;
- }
- else {
- assert(format == GL_DEPTH_COMPONENT);
- /* Copy color info */
- zoomed.red = span->red;
- zoomed.green = span->green;
- zoomed.blue = span->blue;
- zoomed.alpha = span->alpha;
- zoomed.redStep = span->redStep;
- zoomed.greenStep = span->greenStep;
- zoomed.blueStep = span->blueStep;
- zoomed.alphaStep = span->alphaStep;
- /* we'll generate an array of depth values */
- zoomed.interpMask = span->interpMask & ~SPAN_Z;
- zoomed.arrayMask |= SPAN_Z;
- }
-
- /*
- * 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]);
- }
- }
- }
- 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;
- }
- }
- }
- 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];
- }
- }
- }
- else {
- const GLdepth *zValues = (const GLuint *) src;
- assert(format == GL_DEPTH_COMPONENT);
- 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];
- }
- }
- /* Now, fall into either the RGB or COLOR_INDEX path below */
- if (ctx->Visual.rgbMode)
- format = GL_RGBA;
- else
- format = GL_COLOR_INDEX;
- }
-
-
- /* write the span in rows [r0, r1) */
- if (format == GL_RGBA || format == GL_RGB) {
- /* Writing the span may modify the colors, so make a backup now if we're
- * going to call _swrast_write_zoomed_span() more than once.
- * Also, clipping may change the span end value, so store it as well.
- */
- GLchan rgbaSave[MAX_WIDTH][4];
- const GLint end = zoomed.end; /* save */
- if (r1 - r0 > 1) {
- MEMCPY(rgbaSave, zoomed.array->rgba, zoomed.end * 4 * sizeof(GLchan));
- }
- for (zoomed.y = r0; zoomed.y < r1; zoomed.y++) {
- _swrast_write_rgba_span(ctx, &zoomed);
- zoomed.end = end; /* restore */
- if (r1 - r0 > 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) {
- MEMCPY(indexSave, zoomed.array->index, zoomed.end * sizeof(GLuint));
- }
- for (zoomed.y = r0; zoomed.y < r1; zoomed.y++) {
- _swrast_write_index_span(ctx, &zoomed);
- zoomed.end = end; /* restore */
- if (r1 - r0 > 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 )
-{
- zoom_span(ctx, span, (const GLvoid *) rgba, y0, GL_RGBA, skipPixels);
-}
-
-
-void
-_swrast_write_zoomed_rgb_span( GLcontext *ctx, const struct sw_span *span,
- CONST GLchan rgb[][3], GLint y0,
- GLint skipPixels )
-{
- zoom_span(ctx, span, (const GLvoid *) rgb, y0, GL_RGB, skipPixels);
-}
-
-
-void
-_swrast_write_zoomed_index_span( GLcontext *ctx, const struct sw_span *span,
- GLint y0, GLint skipPixels )
-{
- zoom_span(ctx, span, (const GLvoid *) span->array->index, y0,
- GL_COLOR_INDEX, skipPixels);
-}
-
-
-void
-_swrast_write_zoomed_depth_span( GLcontext *ctx, const struct sw_span *span,
- GLint y0, GLint skipPixels )
-{
- zoom_span(ctx, span, (const GLvoid *) span->array->z, y0,
- GL_DEPTH_COMPONENT, skipPixels);
-}
-
-
-/*
- * As above, but write stencil values.
- */
-void
-_swrast_write_zoomed_stencil_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y,
- const GLstencil stencil[], GLint y0,
- GLint skipPixels )
-{
- 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 */
-
- /* 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;
- }
-
- /* 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;
- }
-
- /* 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;
- }
-
- /* 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;
- }
- else if (m<=0) {
- return;
- }
-
- ASSERT( m <= 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];
- }
- }
- 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];
- }
- }
-
- /* write the span */
- for (r=r0; r<r1; r++) {
- _swrast_write_stencil_span( ctx, m, x+skipcol, r, zstencil );
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-08 22:50:37 +0000