aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/mesa/main/formatquery.c
diff options
context:
space:
mode:
authormarha <marha@users.sourceforge.net>2013-01-16 08:45:43 +0100
committermarha <marha@users.sourceforge.net>2013-01-16 08:45:43 +0100
commitb8219a4680768e14b7fe4930adf86e9be261b31f (patch)
tree193855ef8d48765d67cc11153a15e3c1e2568e50 /mesalib/src/mesa/main/formatquery.c
parent15cdb95b194cb051a5d469cc9eb73eb0eed4db41 (diff)
parent811d1bcf6d61ea49551abdd7f2294c5af2776913 (diff)
downloadvcxsrv-b8219a4680768e14b7fe4930adf86e9be261b31f.tar.gz
vcxsrv-b8219a4680768e14b7fe4930adf86e9be261b31f.tar.bz2
vcxsrv-b8219a4680768e14b7fe4930adf86e9be261b31f.zip
Merge remote-tracking branch 'origin/released'
* origin/released: Switched to xcalc-1.0.5 Switched to bdftopcf-1.0.4 libxtrans fontconfig glproto libX11 libXau libXext libXft libXinerama libXmu libfontenc mesa xkeyboard-config
Diffstat (limited to 'mesalib/src/mesa/main/formatquery.c')
-rw-r--r--mesalib/src/mesa/main/formatquery.c147
1 files changed, 147 insertions, 0 deletions
diff --git a/mesalib/src/mesa/main/formatquery.c b/mesalib/src/mesa/main/formatquery.c
new file mode 100644
index 000000000..f08ab66f0
--- /dev/null
+++ b/mesalib/src/mesa/main/formatquery.c
@@ -0,0 +1,147 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * 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 (including the next
+ * paragraph) 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.
+ */
+
+#include "mtypes.h"
+#include "glformats.h"
+#include "macros.h"
+#include "mfeatures.h"
+#include "enums.h"
+#include "fbobject.h"
+#include "formatquery.h"
+
+void GLAPIENTRY
+_mesa_GetInternalformativ(GLenum target, GLenum internalformat, GLenum pname,
+ GLsizei bufSize, GLint *params)
+{
+ GLint buffer[16];
+ GLsizei count = 0;
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (!ctx->Extensions.ARB_internalformat_query) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetInternalformativ");
+ return;
+ }
+
+ assert(ctx->Driver.QuerySamplesForFormat != NULL);
+
+ /* The ARB_internalformat_query spec says:
+ *
+ * "If the <target> parameter to GetInternalformativ is not one of
+ * TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_MULTISAMPLE_ARRAY or RENDERBUFFER
+ * then an INVALID_ENUM error is generated."
+ */
+ switch (target) {
+ case GL_RENDERBUFFER:
+ break;
+
+ case GL_TEXTURE_2D_MULTISAMPLE:
+ case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
+ /* Mesa does not currently support GL_ARB_texture_multisample, so these
+ * enums are not valid on this implementation either.
+ */
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetInternalformativ(target=%s)",
+ _mesa_lookup_enum_by_nr(target));
+ return;
+ }
+
+ /* The ARB_internalformat_query spec says:
+ *
+ * "If the <internalformat> parameter to GetInternalformativ is not
+ * color-, depth- or stencil-renderable, then an INVALID_ENUM error is
+ * generated."
+ */
+ if (_mesa_base_fbo_format(ctx, internalformat) == 0) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetInternalformativ(internalformat=%s)",
+ _mesa_lookup_enum_by_nr(internalformat));
+ return;
+ }
+
+ /* The ARB_internalformat_query spec says:
+ *
+ * "If the <bufSize> parameter to GetInternalformativ is negative, then
+ * an INVALID_VALUE error is generated."
+ */
+ if (bufSize < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glGetInternalformativ(target=%s)",
+ _mesa_lookup_enum_by_nr(target));
+ return;
+ }
+
+ switch (pname) {
+ case GL_SAMPLES:
+ count = ctx->Driver.QuerySamplesForFormat(ctx, internalformat, buffer);
+ break;
+ case GL_NUM_SAMPLE_COUNTS: {
+ /* The driver can return 0, and we should pass that along to the
+ * application. The ARB decided that ARB_internalformat_query should
+ * behave as ARB_internalformat_query2 in this situation.
+ *
+ * The ARB_internalformat_query2 spec says:
+ *
+ * "- NUM_SAMPLE_COUNTS: The number of sample counts that would be
+ * returned by querying SAMPLES is returned in <params>.
+ * * If <internalformat> is not color-renderable,
+ * depth-renderable, or stencil-renderable (as defined in
+ * section 4.4.4), or if <target> does not support multiple
+ * samples (ie other than TEXTURE_2D_MULTISAMPLE,
+ * TEXTURE_2D_MULTISAMPLE_ARRAY, or RENDERBUFFER), 0 is
+ * returned."
+ */
+ const size_t num_samples =
+ ctx->Driver.QuerySamplesForFormat(ctx, internalformat, buffer);
+
+ /* QuerySamplesForFormat writes some stuff to buffer, so we have to
+ * separately over-write it with the requested value.
+ */
+ buffer[0] = (GLint) num_samples;
+ count = 1;
+ break;
+ }
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetInternalformativ(pname=%s)",
+ _mesa_lookup_enum_by_nr(pname));
+ return;
+ }
+
+ if (bufSize != 0 && params == NULL) {
+ /* Emit a warning to aid application debugging, but go ahead and do the
+ * memcpy (and probably crash) anyway.
+ */
+ _mesa_warning(ctx,
+ "glGetInternalformativ(bufSize = %d, but params = NULL)",
+ bufSize);
+ }
+
+ /* Copy the data from the temporary buffer to the buffer supplied by the
+ * application. Clamp the size of the copy to the size supplied by the
+ * application.
+ */
+ memcpy(params, buffer, MIN2(count, bufSize) * sizeof(GLint));
+
+ return;
+}