[1/2] port ttexrect.cpp to piglit from glean

This ported test goes into tests/spec/arb_texture_rectangle. It
tests the ARB_texture_rectangle extension.

Create a 255x127 texture of varying colors and bind it as a
GL_ARB_texture_recangle target.  Draw that rectangle to the window, and
check that the texture was drawn correctly.  The common failure to be
caught with this test is not adjusting the non-normalized coordinates on
hardware that expects normalized coordinates.

Signed-off-by: Tom Gall <tom.gall@linaro.org>
---
 tests/spec/CMakeLists.txt                          |    1 +
 tests/spec/arb_texture_rectangle/CMakeLists.gl.txt |   13 ++
 tests/spec/arb_texture_rectangle/CMakeLists.txt    |    1 +
 tests/spec/arb_texture_rectangle/texrect-simple.c  |  132 ++++++++++++++++++++
 4 files changed, 147 insertions(+)
 create mode 100644 tests/spec/arb_texture_rectangle/CMakeLists.gl.txt
 create mode 100644 tests/spec/arb_texture_rectangle/CMakeLists.txt
 create mode 100644 tests/spec/arb_texture_rectangle/texrect-simple.c

On 01/18/2013 01:04 PM, Tom Gall wrote:
> This ported test goes into tests/spec/arb_texture_rectangle. It
> tests the ARB_texture_rectangle extension.
>
> Create a 255x127 texture of varying colors and bind it as a
> GL_ARB_texture_recangle target.  Draw that rectangle to the window, and
> check that the texture was drawn correctly.  The common failure to be
> caught with this test is not adjusting the non-normalized coordinates on
> hardware that expects normalized coordinates.
>
> Signed-off-by: Tom Gall<tom.gall@linaro.org>
> ---
>   tests/spec/CMakeLists.txt                          |    1 +
>   tests/spec/arb_texture_rectangle/CMakeLists.gl.txt |   13 ++
>   tests/spec/arb_texture_rectangle/CMakeLists.txt    |    1 +
>   tests/spec/arb_texture_rectangle/texrect-simple.c  |  132 ++++++++++++++++++++

Update tests/all.tests too?


>   4 files changed, 147 insertions(+)
>   create mode 100644 tests/spec/arb_texture_rectangle/CMakeLists.gl.txt
>   create mode 100644 tests/spec/arb_texture_rectangle/CMakeLists.txt
>   create mode 100644 tests/spec/arb_texture_rectangle/texrect-simple.c
>
> diff --git a/tests/spec/CMakeLists.txt b/tests/spec/CMakeLists.txt
> index a4342b7..8b06d5c 100644
> --- a/tests/spec/CMakeLists.txt
> +++ b/tests/spec/CMakeLists.txt
> @@ -24,6 +24,7 @@ add_subdirectory (arb_texture_buffer_object)
>   add_subdirectory (arb_texture_compression)
>   add_subdirectory (arb_texture_cube_map_array)
>   add_subdirectory (arb_texture_float)
> +add_subdirectory (arb_texture_rectangle)
>   add_subdirectory (arb_texture_storage)
>   add_subdirectory (arb_timer_query)
>   add_subdirectory (arb_transform_feedback2)
> diff --git a/tests/spec/arb_texture_rectangle/CMakeLists.gl.txt b/tests/spec/arb_texture_rectangle/CMakeLists.gl.txt
> new file mode 100644
> index 0000000..d84a850
> --- /dev/null
> +++ b/tests/spec/arb_texture_rectangle/CMakeLists.gl.txt
> @@ -0,0 +1,13 @@
> +include_directories(
> +	${GLEXT_INCLUDE_DIR}
> +	${OPENGL_INCLUDE_PATH}
> +	${piglit_SOURCE_DIR}/tests/mesa/util
> +)
> +
> +link_libraries (
> +	piglitutil_${piglit_target_api}
> +	${OPENGL_gl_LIBRARY}
> +	${OPENGL_glu_LIBRARY}
> +)
> +
> +piglit_add_executable (texrect_simple_arb_texrect texrect-simple.c)
> diff --git a/tests/spec/arb_texture_rectangle/CMakeLists.txt b/tests/spec/arb_texture_rectangle/CMakeLists.txt
> new file mode 100644
> index 0000000..144a306
> --- /dev/null
> +++ b/tests/spec/arb_texture_rectangle/CMakeLists.txt
> @@ -0,0 +1 @@
> +piglit_include_target_api()
> diff --git a/tests/spec/arb_texture_rectangle/texrect-simple.c b/tests/spec/arb_texture_rectangle/texrect-simple.c
> new file mode 100644
> index 0000000..1a8f33f
> --- /dev/null
> +++ b/tests/spec/arb_texture_rectangle/texrect-simple.c
> @@ -0,0 +1,132 @@
> +/* Copyright © 2013 Linaro Inc
> + *
> + * 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.
> + */
> +
> +/**
> + * Ported from glean ttexrect.cpp into piglit.
> + * Test the ARB_texture_rectangle extension
> + *   Create a 255x127 texture of varying colors and bind it as a
> + *   GL_ARB_texture_recangle target.  Draw that rectangle to the window, and
> + *   check that the texture was drawn correctly.  The common failure to be
> + *   caught with this test is not adjusting the non-normalized coordinates on
> + *   hardware that expects normalized coordinates.
> + * \author: Eric Anholt<eric@anholt.net>  (original)
> + * \author: Tom Gall<tom.gall@linaro.org>  (port)
> + */
> +#include "piglit-util-gl-common.h"
> +
> +#define TEXTURE_WIDTH   255
> +#define TEXTURE_HEIGHT  127
> +#define WINDOW_SIZE     256
> +
> +PIGLIT_GL_TEST_CONFIG_BEGIN
> +
> +	config.supports_gl_compat_version = 10;
> +	config.window_width = WINDOW_SIZE;
> +	config.window_height = WINDOW_SIZE;
> +	config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DEPTH;

Add PIGLIT_GL_VISUAL_DOUBLE since you call glDrawBuffer(GL_BACK) below.


> +
> +PIGLIT_GL_TEST_CONFIG_END
> +
> +
> +enum piglit_result
> +piglit_display(void)
> +{
> +	int x,y,i;
> +	enum piglit_result final_result = PIGLIT_PASS;
> +	float image[TEXTURE_WIDTH * TEXTURE_HEIGHT * 3];
> +
> +	/* Set up a texture that is color ramps with red to black top to
> +	 * bottom and green to black left to right.
> +	 */
> +	for (y = 0; y<  TEXTURE_HEIGHT; y++) {
> +		for (x = 0; x<  TEXTURE_WIDTH; x++) {
> +			i = (y * TEXTURE_WIDTH + x) * 3;
> +
> +			image[i + 0] = (float)x / (TEXTURE_WIDTH - 1);
> +			image[i + 1] = 1.0 - ((float)  y / (TEXTURE_HEIGHT - 1));
> +			image[i + 2] = 0.0;
> +		}
> +	}
> +
> +	glClearColor(0.0, 0.0, 0.0, 0.0);
> +	glClear(GL_COLOR_BUFFER_BIT);
> +
> +	glShadeModel(GL_FLAT);
> +
> +	glMatrixMode(GL_PROJECTION);
> +	glLoadIdentity();
> +	glOrtho(0, WINDOW_SIZE, 0, WINDOW_SIZE, -1, 1);
> +	glMatrixMode(GL_MODELVIEW);
> +	glLoadIdentity();
> +	glViewport(0, 0, WINDOW_SIZE, WINDOW_SIZE);
> +
> +	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGB,
> +		TEXTURE_WIDTH, TEXTURE_HEIGHT, 0, GL_RGB, GL_FLOAT, image);
> +	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
> +		GL_NEAREST);
> +	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
> +		GL_NEAREST);
> +	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
> +	glEnable(GL_TEXTURE_RECTANGLE_ARB);
> +
> +	glDrawBuffer(GL_BACK);
> +	glReadBuffer(GL_BACK);

We'd typically put most of this setup code in piglit_init() but it's 
not a big deal to me.


> +
> +	/* Draw our texture to the window such that each texel should map
> +	 * to the corresponding pixel of the window.
> +	 */
> +	glBegin(GL_POLYGON);
> +	glTexCoord2f(0, 0);
> +	glVertex2f(0, 0);
> +
> +	glTexCoord2f(TEXTURE_WIDTH, 0);
> +	glVertex2f(TEXTURE_WIDTH, 0);
> +
> +	glTexCoord2f(TEXTURE_WIDTH, TEXTURE_HEIGHT);
> +	glVertex2f(TEXTURE_WIDTH, TEXTURE_HEIGHT);
> +
> +	glTexCoord2f(0, TEXTURE_HEIGHT);
> +	glVertex2f(0, TEXTURE_HEIGHT);
> +	glEnd();

I think there's a piglit_draw_xxx() function for a simple textured 
quad like that.  Not a big deal though.


> +
> +	piglit_swap_buffers();
> +
> +	/* Verify the output */
> +	for (y = 0; y<  TEXTURE_HEIGHT; y++) {
> +		for (x = 0; x<  TEXTURE_WIDTH; x++) {
> +			i = (y * TEXTURE_WIDTH + x) * 3;
> +
> +			if (!piglit_probe_pixel_rgb(x,y,&image[i])) {
> +				final_result = PIGLIT_FAIL;
> +			}
> +		}
> +	}
> +
> +	piglit_report_result(final_result);
> +	return final_result;
> +}
> +
> +
> +void
> +piglit_init(int argc, char *argv[])
> +{
> +}

Looks good otherwise.

Reviewed-by: Brian Paul <brianp@vmware.com>

Thanks for doing this!

-Brian