From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c | 428 ++++++++++++++++++++++++++++ 1 file changed, 428 insertions(+) create mode 100644 nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c (limited to 'nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c') diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c new file mode 100644 index 000000000..b67a29701 --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c @@ -0,0 +1,428 @@ + +/* + * 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= (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;jPixel.ZoomX; + for (j=0;j