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authormarha <marha@users.sourceforge.net>2010-11-22 19:42:40 +0000
committermarha <marha@users.sourceforge.net>2010-11-22 19:42:40 +0000
commit85ef9930f56bf15181f9a0b238f03d55303cf411 (patch)
tree63b43286956ebd1c35c96e9b3d5305aabdf71a0f /mesalib/progs/util/showbuffer.c
parent94810d19989336862251dbf69c3f3acb18a9b06d (diff)
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Updated to mesalib 7.9
Diffstat (limited to 'mesalib/progs/util/showbuffer.c')
-rw-r--r--mesalib/progs/util/showbuffer.c198
1 files changed, 0 insertions, 198 deletions
diff --git a/mesalib/progs/util/showbuffer.c b/mesalib/progs/util/showbuffer.c
deleted file mode 100644
index b0cedea21..000000000
--- a/mesalib/progs/util/showbuffer.c
+++ /dev/null
@@ -1,198 +0,0 @@
-/* showbuffer.c */
-
-
-/*
- * Copy the depth buffer to the color buffer as a grayscale image.
- * Useful for inspecting the depth buffer values.
- *
- * This program is in the public domain.
- *
- * Brian Paul November 4, 1998
- */
-
-
-#include <assert.h>
-#include <stdlib.h>
-#include <GL/gl.h>
-#include "showbuffer.h"
-
-
-
-/*
- * Copy the depth buffer values into the current color buffer as a
- * grayscale image.
- * Input: winWidth, winHeight - size of the window
- * zBlack - the Z value which should map to black (usually 1)
- * zWhite - the Z value which should map to white (usually 0)
- */
-void
-ShowDepthBuffer( GLsizei winWidth, GLsizei winHeight,
- GLfloat zBlack, GLfloat zWhite )
-{
- GLfloat *depthValues;
-
- assert(zBlack >= 0.0);
- assert(zBlack <= 1.0);
- assert(zWhite >= 0.0);
- assert(zWhite <= 1.0);
- assert(zBlack != zWhite);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
-
- /* Read depth values */
- depthValues = (GLfloat *) malloc(winWidth * winHeight * sizeof(GLfloat));
- assert(depthValues);
- glReadPixels(0, 0, winWidth, winHeight, GL_DEPTH_COMPONENT,
- GL_FLOAT, depthValues);
-
- /* Map Z values from [zBlack, zWhite] to gray levels in [0, 1] */
- /* Not using glPixelTransfer() because it's broke on some systems! */
- if (zBlack != 0.0 || zWhite != 1.0) {
- GLfloat scale = 1.0 / (zWhite - zBlack);
- GLfloat bias = -zBlack * scale;
- int n = winWidth * winHeight;
- int i;
- for (i = 0; i < n; i++)
- depthValues[i] = depthValues[i] * scale + bias;
- }
-
- /* save GL state */
- glPushAttrib(GL_CURRENT_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT |
- GL_TRANSFORM_BIT | GL_VIEWPORT_BIT);
-
- /* setup raster pos for glDrawPixels */
- glMatrixMode(GL_PROJECTION);
- glPushMatrix();
- glLoadIdentity();
-
- glOrtho(0.0, (GLdouble) winWidth, 0.0, (GLdouble) winHeight, -1.0, 1.0);
- glMatrixMode(GL_MODELVIEW);
- glPushMatrix();
- glLoadIdentity();
-
- glViewport(0, 0, winWidth, winHeight);
-
- glDisable(GL_STENCIL_TEST);
- glDisable(GL_DEPTH_TEST);
- glRasterPos2f(0, 0);
-
- glDrawPixels(winWidth, winHeight, GL_LUMINANCE, GL_FLOAT, depthValues);
-
- glPopMatrix();
- glMatrixMode(GL_PROJECTION);
- glPopMatrix();
- free(depthValues);
-
- glPopAttrib();
-}
-
-
-
-
-/*
- * Copy the alpha channel values into the current color buffer as a
- * grayscale image.
- * Input: winWidth, winHeight - size of the window
- */
-void
-ShowAlphaBuffer( GLsizei winWidth, GLsizei winHeight )
-{
- GLubyte *alphaValues;
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
-
- /* Read alpha values */
- alphaValues = (GLubyte *) malloc(winWidth * winHeight * sizeof(GLubyte));
- assert(alphaValues);
- glReadPixels(0, 0, winWidth, winHeight, GL_ALPHA, GL_UNSIGNED_BYTE, alphaValues);
-
- /* save GL state */
- glPushAttrib(GL_CURRENT_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL |
- GL_TRANSFORM_BIT | GL_VIEWPORT_BIT);
-
- /* setup raster pos for glDrawPixels */
- glMatrixMode(GL_PROJECTION);
- glPushMatrix();
- glLoadIdentity();
-
- glOrtho(0.0, (GLdouble) winWidth, 0.0, (GLdouble) winHeight, -1.0, 1.0);
- glMatrixMode(GL_MODELVIEW);
- glPushMatrix();
- glLoadIdentity();
-
- glViewport(0, 0, winWidth, winHeight);
-
- glDisable(GL_STENCIL_TEST);
- glDisable(GL_DEPTH_TEST);
- glRasterPos2f(0, 0);
-
- glDrawPixels(winWidth, winHeight, GL_LUMINANCE, GL_UNSIGNED_BYTE, alphaValues);
-
- glPopMatrix();
- glMatrixMode(GL_PROJECTION);
- glPopMatrix();
- free(alphaValues);
-
- glPopAttrib();
-}
-
-
-
-/*
- * Copy the stencil buffer values into the current color buffer as a
- * grayscale image.
- * Input: winWidth, winHeight - size of the window
- * scale, bias - scale and bias to apply to stencil values for display
- */
-void
-ShowStencilBuffer( GLsizei winWidth, GLsizei winHeight,
- GLfloat scale, GLfloat bias )
-{
- GLubyte *stencilValues;
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
-
- /* Read stencil values */
- stencilValues = (GLubyte *) malloc(winWidth * winHeight * sizeof(GLubyte));
- assert(stencilValues);
- glReadPixels(0, 0, winWidth, winHeight, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, stencilValues);
-
- /* save GL state */
- glPushAttrib(GL_CURRENT_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT |
- GL_PIXEL_MODE_BIT | GL_TRANSFORM_BIT | GL_VIEWPORT_BIT);
-
- /* setup raster pos for glDrawPixels */
- glMatrixMode(GL_PROJECTION);
- glPushMatrix();
- glLoadIdentity();
-
- glOrtho(0.0, (GLdouble) winWidth, 0.0, (GLdouble) winHeight, -1.0, 1.0);
- glMatrixMode(GL_MODELVIEW);
- glPushMatrix();
- glLoadIdentity();
-
- glViewport(0, 0, winWidth, winHeight);
-
- glDisable(GL_STENCIL_TEST);
- glDisable(GL_DEPTH_TEST);
- glRasterPos2f(0, 0);
-
- glPixelTransferf(GL_RED_SCALE, scale);
- glPixelTransferf(GL_RED_BIAS, bias);
- glPixelTransferf(GL_GREEN_SCALE, scale);
- glPixelTransferf(GL_GREEN_BIAS, bias);
- glPixelTransferf(GL_BLUE_SCALE, scale);
- glPixelTransferf(GL_BLUE_BIAS, bias);
-
- glDrawPixels(winWidth, winHeight, GL_LUMINANCE, GL_UNSIGNED_BYTE, stencilValues);
-
- glPopMatrix();
- glMatrixMode(GL_PROJECTION);
- glPopMatrix();
- free(stencilValues);
-
- glPopAttrib();
-}