Demos (master): tools: Add simple DDS viewer.
Jose Fonseca
jrfonseca at kemper.freedesktop.org
Thu Jun 6 13:23:24 UTC 2013
Module: Demos
Branch: master
Commit: d40bc73f268480b94cd70dbdc1fa67aa82666882
URL: http://cgit.freedesktop.org/mesa/demos/commit/?id=d40bc73f268480b94cd70dbdc1fa67aa82666882
Author: José Fonseca <jfonseca at vmware.com>
Date: Thu Jun 6 14:11:27 2013 +0100
tools: Add simple DDS viewer.
>From http://tfc.duke.free.fr/ . Quite handy to visualize compressed
textures, which are often stored in DDS format.
---
src/CMakeLists.txt | 1 +
src/tools/.gitignore | 1 +
src/tools/CMakeLists.txt | 30 ++++
src/tools/dds.c | 395 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 427 insertions(+), 0 deletions(-)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 13da6b6..4e1c54e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -15,6 +15,7 @@ add_subdirectory (vp)
add_subdirectory (vpglsl)
add_subdirectory (gs)
add_subdirectory (slang)
+add_subdirectory (tools)
if (EGL_FOUND)
add_subdirectory(egl)
diff --git a/src/tools/.gitignore b/src/tools/.gitignore
new file mode 100644
index 0000000..d7985d0
--- /dev/null
+++ b/src/tools/.gitignore
@@ -0,0 +1 @@
+dds
diff --git a/src/tools/CMakeLists.txt b/src/tools/CMakeLists.txt
new file mode 100644
index 0000000..dbf7c4f
--- /dev/null
+++ b/src/tools/CMakeLists.txt
@@ -0,0 +1,30 @@
+include_directories (
+ ${CMAKE_SOURCE_DIR}/src/util
+ ${OPENGL_INCLUDE_PATH}
+ ${GLUT_INCLUDE_DIR}
+ ${GLEW_INCLUDE_DIR}
+)
+
+link_directories (
+ ${CMAKE_SOURCE_DIR}/src/util
+)
+
+link_libraries (
+ util
+ ${OPENGL_gl_LIBRARY}
+ ${OPENGL_glu_LIBRARY}
+ ${GLUT_glut_LIBRARY}
+ ${GLEW_glew_LIBRARY}
+)
+
+set (subdir tools)
+
+set (targets
+ dds
+)
+
+foreach (target ${targets})
+ add_executable (${subdir}_${target} ${target}.c)
+ set_target_properties (${subdir}_${target} PROPERTIES OUTPUT_NAME ${target})
+ install (TARGETS ${subdir}_${target} DESTINATION ${subdir})
+endforeach (target)
diff --git a/src/tools/dds.c b/src/tools/dds.c
new file mode 100644
index 0000000..78aa1d7
--- /dev/null
+++ b/src/tools/dds.c
@@ -0,0 +1,395 @@
+/*
+ * dds.c -- dds texture loader
+ * last modification: aug. 14, 2007
+ *
+ * Copyright (c) 2005-2007 David HENRY
+ *
+ * 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 THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ * gcc -Wall -ansi -lGL -lGLU -lglut dds.c -o dds
+ */
+
+#ifndef _WIN32
+#ifndef GL_GLEXT_PROTOTYPES
+#define GL_GLEXT_PROTOTYPES 1
+#endif /* GL_GLEXT_PROTOTYPES */
+#endif /* _WIN32 */
+
+#include <GL/glut.h>
+#include <GL/glext.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef _WIN32
+PFNGLCOMPRESSEDTEXIMAGE2DARBPROC glCompressedTexImage2D = NULL;
+#endif /* _WIN32 */
+
+
+/* OpenGL texture info */
+struct gl_texture_t
+{
+ GLsizei width;
+ GLsizei height;
+
+ GLenum format;
+ GLint internalFormat;
+ GLuint id;
+
+ GLubyte *texels;
+
+ GLint numMipmaps;
+};
+
+/* DirectDraw's structures */
+struct DDPixelFormat
+{
+ GLuint size;
+ GLuint flags;
+ GLuint fourCC;
+ GLuint bpp;
+ GLuint redMask;
+ GLuint greenMask;
+ GLuint blueMask;
+ GLuint alphaMask;
+};
+
+struct DDSCaps
+{
+ GLuint caps;
+ GLuint caps2;
+ GLuint caps3;
+ GLuint caps4;
+};
+
+struct DDColorKey
+{
+ GLuint lowVal;
+ GLuint highVal;
+};
+
+struct DDSurfaceDesc
+{
+ GLuint size;
+ GLuint flags;
+ GLuint height;
+ GLuint width;
+ GLuint pitch;
+ GLuint depth;
+ GLuint mipMapLevels;
+ GLuint alphaBitDepth;
+ GLuint reserved;
+ GLuint surface;
+
+ struct DDColorKey ckDestOverlay;
+ struct DDColorKey ckDestBlt;
+ struct DDColorKey ckSrcOverlay;
+ struct DDColorKey ckSrcBlt;
+
+ struct DDPixelFormat format;
+ struct DDSCaps caps;
+
+ GLuint textureStage;
+};
+
+#define MAKEFOURCC(ch0, ch1, ch2, ch3) \
+ (GLuint)( \
+ (((GLuint)(GLubyte)(ch3) << 24) & 0xFF000000) | \
+ (((GLuint)(GLubyte)(ch2) << 16) & 0x00FF0000) | \
+ (((GLuint)(GLubyte)(ch1) << 8) & 0x0000FF00) | \
+ ((GLuint)(GLubyte)(ch0) & 0x000000FF) )
+
+#define FOURCC_DXT1 MAKEFOURCC('D', 'X', 'T', '1')
+#define FOURCC_DXT3 MAKEFOURCC('D', 'X', 'T', '3')
+#define FOURCC_DXT5 MAKEFOURCC('D', 'X', 'T', '5')
+
+/* texture Id */
+GLuint texId;
+
+
+#ifndef max
+static int
+max (int a, int b)
+{
+ return ((a > b) ? a : b);
+}
+#endif
+
+static struct gl_texture_t *
+ReadDDSFile (const char *filename)
+{
+ struct DDSurfaceDesc ddsd;
+ struct gl_texture_t *texinfo;
+ FILE *fp;
+ char magic[4];
+ int mipmapFactor;
+ long bufferSize, curr, end;
+
+ /* Open the file */
+ fp = fopen (filename, "rb");
+ if (!fp)
+ {
+ fprintf (stderr, "error: couldn't open \"%s\"!\n", filename);
+ return NULL;
+ }
+
+ /* Read magic number and check if valid .dds file */
+ fread (&magic, sizeof (char), 4, fp);
+
+ if (strncmp (magic, "DDS ", 4) != 0)
+ {
+ fprintf (stderr, "the file \"%s\" doesn't appear to be"
+ "a valid .dds file!\n", filename);
+ fclose (fp);
+ return NULL;
+ }
+
+ /* Get the surface descriptor */
+ fread (&ddsd, sizeof (ddsd), 1, fp);
+
+ texinfo = (struct gl_texture_t *)
+ calloc (sizeof (struct gl_texture_t), 1);
+ texinfo->width = ddsd.width;
+ texinfo->height = ddsd.height;
+ texinfo->numMipmaps = ddsd.mipMapLevels;
+
+ switch (ddsd.format.fourCC)
+ {
+ case FOURCC_DXT1:
+ /* DXT1's compression ratio is 8:1 */
+ texinfo->format = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
+ texinfo->internalFormat = 3;
+ mipmapFactor = 2;
+ break;
+
+ case FOURCC_DXT3:
+ /* DXT3's compression ratio is 4:1 */
+ texinfo->format = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
+ texinfo->internalFormat = 4;
+ mipmapFactor = 4;
+ break;
+
+ case FOURCC_DXT5:
+ /* DXT5's compression ratio is 4:1 */
+ texinfo->format = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
+ texinfo->internalFormat = 4;
+ mipmapFactor = 4;
+ break;
+
+ default:
+ /* Bad fourCC, unsupported or bad format */
+ fprintf (stderr, "the file \"%s\" doesn't appear to be"
+ "compressed using DXT1, DXT3, or DXT5! [%i]\n",
+ filename, ddsd.format.fourCC);
+ free (texinfo);
+ fclose (fp);
+ return NULL;
+ }
+
+ /* Calculate pixel data size */
+ curr = ftell (fp);
+ fseek (fp, 0, SEEK_END);
+ end = ftell (fp);
+ fseek (fp, curr, SEEK_SET);
+ bufferSize = end - curr;
+
+ /* Read pixel data with mipmaps */
+ texinfo->texels = (GLubyte *)malloc (bufferSize * sizeof (GLubyte));
+ fread (texinfo->texels, sizeof (GLubyte), bufferSize, fp);
+
+ /* Close the file */
+ fclose (fp);
+ return texinfo;
+}
+
+GLuint
+loadDDSTexture (const char *filename)
+{
+ struct gl_texture_t *compressed_texture = NULL;
+ GLsizei mipWidth, mipHeight, mipSize;
+ int blockSize, offset;
+ GLuint tex_id = 0;
+ GLint mip;
+
+ /* Read texture from file */
+ compressed_texture = ReadDDSFile (filename);
+
+ if (compressed_texture && compressed_texture->texels)
+ {
+ /* Generate new texture */
+ glGenTextures (1, &compressed_texture->id);
+ glBindTexture (GL_TEXTURE_2D, compressed_texture->id);
+
+ /* Setup some parameters for texture filters and mipmapping */
+ glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+ glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ mipWidth = compressed_texture->width;
+ mipHeight = compressed_texture->height;
+ blockSize = (compressed_texture->format == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT) ? 8 : 16;
+ offset = 0;
+
+ /* Upload mipmaps to video memory */
+ for (mip = 0; mip < compressed_texture->numMipmaps; ++mip)
+ {
+ mipSize = ((mipWidth + 3) / 4) * ((mipHeight + 3) / 4) * blockSize;
+
+ glCompressedTexImage2D (GL_TEXTURE_2D, mip, compressed_texture->format,
+ mipWidth, mipHeight, 0, mipSize,
+ compressed_texture->texels + offset);
+
+ mipWidth = max (mipWidth >> 1, 1);
+ mipHeight = max (mipHeight >> 1, 1);
+
+ offset += mipSize;
+ }
+
+ tex_id = compressed_texture->id;
+
+ /* Opengl has its own copy of pixels */
+ free (compressed_texture->texels);
+ free (compressed_texture);
+ }
+
+ return tex_id;
+}
+
+static void
+cleanup ()
+{
+ glDeleteTextures (1, &texId);
+}
+
+static void
+init (const char *filename)
+{
+ const char *glexts = (const char *)glGetString (GL_EXTENSIONS);
+
+ /* Initialize OpenGL */
+ glClearColor (0.5f, 0.5f, 0.5f, 1.0f);
+ glShadeModel (GL_SMOOTH);
+
+ glEnable (GL_DEPTH_TEST);
+
+ glEnable (GL_BLEND);
+ glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+ /* Check for S3TC support */
+ if (!strstr (glexts, "GL_EXT_texture_compression_s3tc"))
+ {
+ fprintf (stderr, "error: GL_EXT_texture_compression_s3tc "
+ "extension is required for DDS textures!\n");
+ exit(-1);
+ }
+
+ /* Initialize OpenGL extensions */
+#ifdef _WIN32
+ glCompressedTexImage2D = (PFNGLCOMPRESSEDTEXIMAGE2DARBPROC)
+ wglGetProcAddress ("glCompressedTexImage2DARB");
+#endif
+
+ /* Load DDS texture from file */
+ texId = loadDDSTexture (filename);
+ if (!texId)
+ exit (EXIT_FAILURE);
+}
+
+static void
+reshape (int w, int h)
+{
+ if (h == 0)
+ h = 1;
+
+ glViewport (0, 0, (GLsizei)w, (GLsizei)h);
+
+ glMatrixMode (GL_PROJECTION);
+ glLoadIdentity ();
+ gluPerspective (45.0, w/(GLdouble)h, 0.1, 1000.0);
+
+ glMatrixMode (GL_MODELVIEW);
+ glLoadIdentity ();
+
+ glutPostRedisplay ();
+}
+
+static void
+display ()
+{
+ glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ glLoadIdentity ();
+
+ glEnable (GL_TEXTURE_2D);
+ glBindTexture (GL_TEXTURE_2D, texId);
+
+ /* Draw textured quad */
+ glTranslatef (0.0, 0.0, -5.0);
+ glBegin (GL_QUADS);
+ glTexCoord2f (0.0f, 0.0f);
+ glVertex3f (-1.0f, -1.0f, 0.0f);
+
+ glTexCoord2f (1.0f, 0.0f);
+ glVertex3f (1.0f, -1.0f, 0.0f);
+
+ glTexCoord2f (1.0f, 1.0f);
+ glVertex3f (1.0f, 1.0f, 0.0f);
+
+ glTexCoord2f (0.0f, 1.0f);
+ glVertex3f (-1.0f, 1.0f, 0.0f);
+ glEnd ();
+
+ glDisable (GL_TEXTURE_2D);
+
+ glutSwapBuffers ();
+}
+
+static void
+keyboard (unsigned char key, int x, int y)
+{
+ /* Escape */
+ if (key == 27)
+ exit (0);
+}
+
+int
+main (int argc, char *argv[])
+{
+ if (argc < 2)
+ {
+ fprintf (stderr, "usage: %s <filename.dds>\n", argv[0]);
+ return -1;
+ }
+
+ glutInit (&argc, argv);
+ glutInitDisplayMode (GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
+ glutInitWindowSize (640, 480);
+ glutCreateWindow ("DDS Texture Demo");
+
+ atexit (cleanup);
+ init (argv[1]);
+
+ glutReshapeFunc (reshape);
+ glutDisplayFunc (display);
+ glutKeyboardFunc (keyboard);
+
+ glutMainLoop ();
+
+ return 0;
+}
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