[Piglit] [PATCH] arb_texture_buffer_range: Fix buffer alignment in ranges-2 test
Anthony Pesch
apesch at nvidia.com
Fri May 24 18:21:46 UTC 2019
Hi Pierre,
Thanks!
I've modifed the patch to cast data, and added an additional check to
ensure unaligned offsets produce INVALID_VALUE. I'm not sure how to use
git send-mail to update a review, so I've just inlined the updated patch
here and attached it as well.
- Anthony
commit 770effba655f97be229e13f894884f0e4c3e604a
Author: Anthony Pesch <apesch at nvidia.com>
Date: Thu Apr 11 12:37:07 2019 -0400
arb_texture_buffer_range: Fix buffer alignment in ranges-2 test
The ranges-2 test was failing due to glTexBufferRange returning
GL_INVALID_VALUE
when the offset parameter wasn't GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT
byte aligned.
From the OpenGL 4.6 Core spec:
An INVALID_VALUE error is generated if offset is not an integer
multiple of the
value of TEXTURE_BUFFER_OFFSET_ALIGNMENT.
diff --git a/tests/spec/arb_texture_buffer_range/ranges-2.c
b/tests/spec/arb_texture_buffer_range/ranges-2.c
index 3477e4b52..83a009875 100644
--- a/tests/spec/arb_texture_buffer_range/ranges-2.c
+++ b/tests/spec/arb_texture_buffer_range/ranges-2.c
@@ -91,22 +91,29 @@ float data[] = {
0, 0, 0.5, 0,
};
+int aligned_size = 0;
+int chunk_size = 24 * sizeof(float);
+int num_chunks = 4;
+
enum piglit_result
piglit_display(void) {
int i;
- int chunk_size = 24 * sizeof(float);
bool pass = true;
glClearColor(0.2, 0.2, 0.2, 0.2);
glClear(GL_COLOR_BUFFER_BIT);
- for (i = 0; i < sizeof(data) / chunk_size; i++) {
+ /* verify unaligned offsets produce an error */
+ glTexBufferRange(GL_TEXTURE_BUFFER, GL_RGBA32F, tbo, aligned_size - 1, 1);
+ pass &= glGetError() == GL_INVALID_VALUE;
+
+ for (i = 0; i < num_chunks; i++) {
glTexBufferRange(GL_TEXTURE_BUFFER, GL_RGBA32F,
- tbo, i * chunk_size, chunk_size);
+ tbo, i * aligned_size, chunk_size);
glDrawArrays(GL_TRIANGLES, 0, 6);
}
- for (i = 0; i < sizeof(data) / chunk_size; i++) {
+ for (i = 0; i < num_chunks; i++) {
float c[4] = {
data[i * 24 + 2],
data[i * 24 + 3],
@@ -114,7 +121,7 @@ piglit_display(void) {
1
};
- pass = piglit_probe_rect_rgba(
+ pass &= piglit_probe_rect_rgba(
piglit_width * 0.5 * (1 + data[i * 24 + 0]),
piglit_height * 0.5 * (1 + data[i * 24 + 1]),
piglit_width/2,
@@ -128,8 +135,14 @@ piglit_display(void) {
void
piglit_init(int argc, char **argv) {
+ GLint align, i;
+ uint8_t *chunk;
+
piglit_require_extension("GL_ARB_texture_buffer_range");
+ glGetIntegerv(GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT, &align);
+ aligned_size = chunk_size % align == 0 ? chunk_size : align;
+
prog = piglit_build_simple_program(vs_source, fs_source);
glUseProgram(prog);
@@ -138,7 +151,12 @@ piglit_init(int argc, char **argv) {
glGenBuffers(1, &tbo);
glBindBuffer(GL_ARRAY_BUFFER, tbo);
- glBufferData(GL_ARRAY_BUFFER, sizeof(data), data, GL_STATIC_DRAW);
+ glBufferData(GL_ARRAY_BUFFER, aligned_size * num_chunks, NULL,
GL_STATIC_DRAW);
+
+ for (i = 0, chunk = (uint8_t *)data; i < num_chunks; i++) {
+ glBufferSubData(GL_ARRAY_BUFFER, aligned_size * i, chunk_size, chunk);
+ chunk += chunk_size;
+ }
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_BUFFER, tex);
On 5/17/19 6:04 AM, Pierre-Eric Pelloux-Prayer wrote:
> Hi,
>
> The patch looks good, except ranges-2.c now cause a compiler warning:
>
> tests/spec/arb_texture_buffer_range/ranges-2.c:152:20: warning: assignment to ‘uint8_t *’ {aka ‘unsigned char *’} from incompatible pointer type ‘float *’ [-Wincompatible-pointer-types]
> for (i = 0, chunk = data; i < num_chunks; i++) {
>
> Another suggestion: it could be interesting to verify that INVALID_VALUE is generated when the alignment constraint is not respected.
>
> Thanks,
>
> Pierre-Eric
>
>
>
>
> On 09/05/2019 20:41, Anthony Pesch wrote:
>> Pinging to see if anyone has the time to review.
>>
>> - Anthony
>>
>> On 4/15/19 4:24 PM, Anthony Pesch wrote:
>>> From: Anthony Pesch <apesch at nvidia.com>
>>>
>>> The ranges-2 test was failing due to glTexBufferRange returning GL_INVALID_VALUE
>>> when the offset parameter wasn't GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT byte aligned.
>>>
>>> From the OpenGL 4.6 Core spec:
>>>
>>> An INVALID_VALUE error is generated if offset is not an integer multiple of the
>>> value of TEXTURE_BUFFER_OFFSET_ALIGNMENT.
>>> ---
>>> .../spec/arb_texture_buffer_range/ranges-2.c | 24 +++++++++++++++----
>>> 1 file changed, 19 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/tests/spec/arb_texture_buffer_range/ranges-2.c b/tests/spec/arb_texture_buffer_range/ranges-2.c
>>> index 3477e4b52..b9cd543b0 100644
>>> --- a/tests/spec/arb_texture_buffer_range/ranges-2.c
>>> +++ b/tests/spec/arb_texture_buffer_range/ranges-2.c
>>> @@ -91,22 +91,25 @@ float data[] = {
>>> 0, 0, 0.5, 0,
>>> };
>>> +int aligned_size = 0;
>>> +int chunk_size = 24 * sizeof(float);
>>> +int num_chunks = 4;
>>> +
>>> enum piglit_result
>>> piglit_display(void) {
>>> int i;
>>> - int chunk_size = 24 * sizeof(float);
>>> bool pass = true;
>>> glClearColor(0.2, 0.2, 0.2, 0.2);
>>> glClear(GL_COLOR_BUFFER_BIT);
>>> - for (i = 0; i < sizeof(data) / chunk_size; i++) {
>>> + for (i = 0; i < num_chunks; i++) {
>>> glTexBufferRange(GL_TEXTURE_BUFFER, GL_RGBA32F,
>>> - tbo, i * chunk_size, chunk_size);
>>> + tbo, i * aligned_size, chunk_size);
>>> glDrawArrays(GL_TRIANGLES, 0, 6);
>>> }
>>> - for (i = 0; i < sizeof(data) / chunk_size; i++) {
>>> + for (i = 0; i < num_chunks; i++) {
>>> float c[4] = {
>>> data[i * 24 + 2],
>>> data[i * 24 + 3],
>>> @@ -128,8 +131,14 @@ piglit_display(void) {
>>> void
>>> piglit_init(int argc, char **argv) {
>>> + GLint align, i;
>>> + uint8_t *chunk;
>>> +
>>> piglit_require_extension("GL_ARB_texture_buffer_range");
>>> + glGetIntegerv(GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT, &align);
>>> + aligned_size = chunk_size % align == 0 ? chunk_size : align;
>>> +
>>> prog = piglit_build_simple_program(vs_source, fs_source);
>>> glUseProgram(prog);
>>> @@ -138,7 +147,12 @@ piglit_init(int argc, char **argv) {
>>> glGenBuffers(1, &tbo);
>>> glBindBuffer(GL_ARRAY_BUFFER, tbo);
>>> - glBufferData(GL_ARRAY_BUFFER, sizeof(data), data, GL_STATIC_DRAW);
>>> + glBufferData(GL_ARRAY_BUFFER, aligned_size * num_chunks, NULL, GL_STATIC_DRAW);
>>> +
>>> + for (i = 0, chunk = data; i < num_chunks; i++) {
>>> + glBufferSubData(GL_ARRAY_BUFFER, aligned_size * i, chunk_size, chunk);
>>> + chunk += chunk_size;
>>> + }
>>> glGenTextures(1, &tex);
>>> glBindTexture(GL_TEXTURE_BUFFER, tex);
>>>
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>> Piglit at lists.freedesktop.org
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