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authorBrian Paul <brianp@vmware.com>2009-05-21 09:12:35 -0600
committerBrian Paul <brianp@vmware.com>2009-05-21 09:17:09 -0600
commit02f73c43b4060b58fa0d9b3da4753cbbccde3c84 (patch)
tree551e6136e99ae7833824f2dd77714056dc715aa2 /src/mesa/main
parent840c09fc71542fdfc71edd2a2802925d467567bb (diff)
mesa: added debug functions for dumping color/depth/stencil buffers
Diffstat (limited to 'src/mesa/main')
-rw-r--r--src/mesa/main/debug.c101
-rw-r--r--src/mesa/main/debug.h9
2 files changed, 110 insertions, 0 deletions
diff --git a/src/mesa/main/debug.c b/src/mesa/main/debug.c
index 2eabcdaf49..80bc6afc4c 100644
--- a/src/mesa/main/debug.c
+++ b/src/mesa/main/debug.c
@@ -341,3 +341,104 @@ _mesa_dump_textures(GLboolean dumpImages)
DumpImages = dumpImages;
_mesa_HashWalk(ctx->Shared->TexObjects, dump_texture_cb, ctx);
}
+
+
+void
+_mesa_dump_color_buffer(const char *filename)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ const GLuint w = ctx->DrawBuffer->Width;
+ const GLuint h = ctx->DrawBuffer->Height;
+ GLubyte *buf;
+
+ buf = (GLubyte *) _mesa_malloc(w * h * 4);
+
+ glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ glPixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
+
+ glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, buf);
+
+ _mesa_printf("ReadBuffer %p 0x%x DrawBuffer %p 0x%x\n",
+ ctx->ReadBuffer->_ColorReadBuffer,
+ ctx->ReadBuffer->ColorReadBuffer,
+ ctx->DrawBuffer->_ColorDrawBuffers[0],
+ ctx->DrawBuffer->ColorDrawBuffer[0]);
+ _mesa_printf("Writing %d x %d color buffer to %s\n", w, h, filename);
+ write_ppm(filename, buf, w, h, 4, 0, 1, 2);
+
+ glPopClientAttrib();
+
+ _mesa_free(buf);
+}
+
+
+void
+_mesa_dump_depth_buffer(const char *filename)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ const GLuint w = ctx->DrawBuffer->Width;
+ const GLuint h = ctx->DrawBuffer->Height;
+ GLuint *buf;
+ GLubyte *buf2;
+ GLuint i;
+
+ buf = (GLuint *) _mesa_malloc(w * h * 4); /* 4 bpp */
+ buf2 = (GLubyte *) _mesa_malloc(w * h * 3); /* 3 bpp */
+
+ glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ glPixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
+
+ glReadPixels(0, 0, w, h, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, buf);
+
+ /* spread 24 bits of Z across R, G, B */
+ for (i = 0; i < w * h; i++) {
+ buf2[i*3+0] = (buf[i] >> 24) & 0xff;
+ buf2[i*3+1] = (buf[i] >> 16) & 0xff;
+ buf2[i*3+2] = (buf[i] >> 8) & 0xff;
+ }
+
+ _mesa_printf("Writing %d x %d depth buffer to %s\n", w, h, filename);
+ write_ppm(filename, buf2, w, h, 3, 0, 1, 2);
+
+ glPopClientAttrib();
+
+ _mesa_free(buf);
+ _mesa_free(buf2);
+}
+
+
+void
+_mesa_dump_stencil_buffer(const char *filename)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ const GLuint w = ctx->DrawBuffer->Width;
+ const GLuint h = ctx->DrawBuffer->Height;
+ GLubyte *buf;
+ GLubyte *buf2;
+ GLuint i;
+
+ buf = (GLubyte *) _mesa_malloc(w * h); /* 1 bpp */
+ buf2 = (GLubyte *) _mesa_malloc(w * h * 3); /* 3 bpp */
+
+ glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ glPixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
+
+ glReadPixels(0, 0, w, h, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, buf);
+
+ for (i = 0; i < w * h; i++) {
+ buf2[i*3+0] = buf[i];
+ buf2[i*3+1] = (buf[i] & 127) * 2;
+ buf2[i*3+2] = (buf[i] - 128) * 2;
+ }
+
+ _mesa_printf("Writing %d x %d stencil buffer to %s\n", w, h, filename);
+ write_ppm(filename, buf2, w, h, 3, 0, 1, 2);
+
+ glPopClientAttrib();
+
+ _mesa_free(buf);
+ _mesa_free(buf2);
+}
diff --git a/src/mesa/main/debug.h b/src/mesa/main/debug.h
index 1862ec75b7..bb384c4324 100644
--- a/src/mesa/main/debug.h
+++ b/src/mesa/main/debug.h
@@ -60,4 +60,13 @@ extern void _mesa_init_debug( GLcontext *ctx );
extern void
_mesa_dump_textures(GLboolean dumpImages);
+extern void
+_mesa_dump_color_buffer(const char *filename);
+
+extern void
+_mesa_dump_depth_buffer(const char *filename);
+
+extern void
+_mesa_dump_stencil_buffer(const char *filename);
+
#endif