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/*
* Copyright © 2011 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.
*/
/** @file negative-prims.c
*
* Tests that glBeginTransformFeedback emits errors when attempting to
* draw primitives other than those allowed by the current transform
* feedback primitiveMode.
*
* From the EXT_transform_feedback spec:
*
* "The error INVALID_OPERATION is generated if Begin, or any
* command that performs an explicit Begin, is called when:
*
* * a geometry shader is not active and <mode> does not match
* the allowed begin modes for the current transform feedback
* state as given by table X.1."
*
* (the test also executes primitives that should pass, to ensure that
* the test is correctly generating GL errors just due to the bad
* primitives)
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.window_width = 32;
config.window_height = 32;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_ALPHA | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
struct {
GLenum tf_prim;
GLenum prim;
const char *name;
} prims[] = {
{ GL_POINTS, GL_POINTS, "GL_POINTS" },
{ GL_LINES, GL_LINES, "GL_LINES" },
{ GL_LINES, GL_LINE_STRIP, "GL_LINE_STRIP" },
{ GL_LINES, GL_LINE_LOOP, "GL_LINE_LOOP" },
{ GL_TRIANGLES, GL_TRIANGLES, "GL_TRIANGLES" },
{ GL_TRIANGLES, GL_TRIANGLE_STRIP, "GL_TRIANGLE_STRIP" },
{ GL_TRIANGLES, GL_TRIANGLE_FAN, "GL_TRIANGLE_FAN" },
{ GL_TRIANGLES, GL_QUADS, "GL_QUADS" },
{ GL_TRIANGLES, GL_QUAD_STRIP, "GL_QUAD_STRIP" },
{ GL_TRIANGLES, GL_POLYGON, "GL_POLYGON" },
};
static bool
test_one_prim(GLenum tf_prim, const char *tf_name, int i)
{
GLenum error;
glDrawArrays(prims[i].prim, 0, 4);
error = glGetError();
if (prims[i].tf_prim != tf_prim) {
if (error != GL_INVALID_OPERATION) {
printf("Expected GL error 0x%x, got 0x%x, when "
"rendering %s during %s transform feedback\n",
GL_INVALID_OPERATION, error,
prims[i].name, tf_name);
return false;
}
} else {
if (error != 0) {
printf("Unxpected GL error 0x%x when "
"rendering %s during %s transform feedback\n",
error,
prims[i].name, tf_name);
return false;
}
}
return true;
}
static bool
test_transform_feedback_prim(GLenum tf_prim, const char *tf_name)
{
bool pass = true;
int i;
glBeginTransformFeedbackEXT(tf_prim);
for (i = 0; i < ARRAY_SIZE(prims); i++) {
pass = pass && test_one_prim(tf_prim, tf_name, i);
}
glEndTransformFeedbackEXT();
return pass;
}
enum piglit_result
piglit_display(void)
{
bool pass = true;
pass = pass && test_transform_feedback_prim(GL_POINTS, "GL_POINTS");
pass = pass && test_transform_feedback_prim(GL_LINES, "GL_LINES");
pass = pass && test_transform_feedback_prim(GL_TRIANGLES, "GL_TRIANGLES");
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
/* UNREACHED */
return PIGLIT_FAIL;
}
static const char *vs_source =
"void main()\n"
"{\n"
" gl_Position = gl_Vertex;\n"
"}\n";
static const char *fs_source =
"void main()\n"
"{\n"
" gl_FragColor = vec4(0.0, 1.0, 0.0, 0.0);\n"
"}\n";
void
piglit_init(int argc, char **argv)
{
float verts[] = {
-1, -1,
1, -1,
1, 1,
-1, 1
};
GLuint vbo, xfb, vs, fs, prog;
const char *varying = "gl_Position";
piglit_require_extension("GL_EXT_transform_feedback");
piglit_require_gl_version(30);
piglit_require_transform_feedback();
glGenBuffersARB(1, &vbo);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, vbo);
glBufferDataARB(GL_ARRAY_BUFFER_ARB, 8 * sizeof(float),
verts, GL_DYNAMIC_DRAW);
glGenBuffersARB(1, &xfb);
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, xfb);
glBufferDataARB(GL_TRANSFORM_FEEDBACK_BUFFER, 4096, NULL,
GL_DYNAMIC_DRAW);
vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_source);
fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_source);
prog = piglit_CreateProgram();
piglit_AttachShader(prog, vs);
piglit_AttachShader(prog, fs);
glTransformFeedbackVaryings(prog, 1, &varying, GL_INTERLEAVED_ATTRIBS);
piglit_LinkProgram(prog);
if (!fs || !vs || !prog)
piglit_report_result(PIGLIT_FAIL);
if (!piglit_link_check_status(prog))
piglit_report_result(PIGLIT_FAIL);
glUseProgram(prog);
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER, 0, xfb, 0, 4096);
}
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