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gl_common: reuse texture for brightness estimation 

Instead of allocating new textures everytime gl_average_texture_color is
called, we keep two textures per gl_image and reuse those.

Doing this significantly improves CPU usage on AMDGPU driver for some
reason. But in general, less texture allocation is always better.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui 2019-11-10 02:47:59 +00:00
parent b11e11e682
commit f6a51be234
No known key found for this signature in database
GPG Key ID: 37C999F617EA1A47
2 changed files with 64 additions and 56 deletions
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117
src/backend/gl/gl_common.c
View File

@ -50,8 +50,8 @@ struct gl_blur_context {
static GLint glGetUniformLocationChecked(GLuint p, const char *name) {
auto ret = glGetUniformLocation(p, name);
if (ret < 0) {
log_error("Failed to get location of uniform '%s'. the compositor might not "
"work correctly.",
log_error("Failed to get location of uniform '%s'. the compositor might "
"not work correctly.",
name);
}
return ret;
@ -191,15 +191,15 @@ static void gl_free_prog_main(gl_win_shader_t *pprogram) {
* we reuse the same two textures for render source and
* destination simply by alterating between them.
* Unfortunately on first iteration source_texture might
* be read-only. In this case we will select auxilary_texture as
* be read-only. In this case we will select auxiliary_texture as
* destination_texture in order not to touch that read-only source
* texture in following render iteration.
* Otherwise we simply will switch source and destination textures
* between each other on each render iteration.
*/
static GLuint _gl_average_texture_color(backend_t *base, GLuint source_texture,
GLuint destination_texture, GLuint auxilary_texture,
GLuint fbo, int width, int height) {
static GLuint
_gl_average_texture_color(backend_t *base, GLuint source_texture, GLuint destination_texture,
GLuint auxiliary_texture, GLuint fbo, int width, int height) {
const int max_width = 1;
const int max_height = 1;
const int from_width = next_power_of_two(width);
@ -209,28 +209,28 @@ static GLuint _gl_average_texture_color(backend_t *base, GLuint source_texture,
// Prepare coordinates
GLint coord[] = {
// top left
0, 0, // vertex coord
0, 0, // texture coord
// top left
0, 0, // vertex coord
0, 0, // texture coord
// top right
to_width, 0, // vertex coord
1, 0, // texture coord
// top right
to_width, 0, // vertex coord
width, 0, // texture coord
// bottom right
to_width, to_height, // vertex coord
1, 1, // texture coord
// bottom right
to_width, to_height, // vertex coord
width, height, // texture coord
// bottom left
0, to_height, // vertex coord
0, 1, // texture coord
// bottom left
0, to_height, // vertex coord
0, height, // texture coord
};
glBufferSubData(GL_ARRAY_BUFFER, 0, (long)sizeof(*coord) * 16, coord);
// Prepare framebuffer for new render iteration
glBindTexture(GL_TEXTURE_2D, destination_texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, to_width, to_height, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, destination_texture, 0);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
destination_texture, 0);
// Bind source texture as downscaling shader uniform input
glBindTexture(GL_TEXTURE_2D, source_texture);
@ -242,10 +242,11 @@ static GLuint _gl_average_texture_color(backend_t *base, GLuint source_texture,
GLuint result;
if (to_width > max_width || to_height > max_height) {
GLuint new_source_texture = destination_texture;
GLuint new_destination_texture = auxilary_texture != 0 ? auxilary_texture : source_texture;
GLuint new_destination_texture =
auxiliary_texture != 0 ? auxiliary_texture : source_texture;
result = _gl_average_texture_color(base, new_source_texture,
new_destination_texture, 0,
fbo, to_width, to_height);
new_destination_texture, 0, fbo,
to_width, to_height);
} else {
result = destination_texture;
}
@ -257,7 +258,8 @@ static GLuint _gl_average_texture_color(backend_t *base, GLuint source_texture,
* @brief Builds a 1x1 texture which has color corresponding to the average of all
* pixels of img by recursively rendering into texture of quorter the size (half
* width and half height).
* Returned texture must be deleted by the caller (use glDeleteTextures).
* Returned texture must not be deleted, since it's owned by the gl_image. It will be
* deleted when the gl_image is released.
*/
static GLuint gl_average_texture_color(backend_t *base, struct gl_image *img) {
@ -265,16 +267,21 @@ static GLuint gl_average_texture_color(backend_t *base, struct gl_image *img) {
// Prepare textures which will be used for destination and source of rendering
// during downscaling.
GLuint textures[2] = {0};
const int texture_count = sizeof(textures)/sizeof(textures[0]);
glGenTextures(texture_count, textures);
glActiveTexture(GL_TEXTURE0);
for (int i = 0; i < texture_count; i++) {
glBindTexture(GL_TEXTURE_2D, textures[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, (GLint []){0, 0, 0, 0});
const int texture_count = ARR_SIZE(img->inner->auxiliary_texture);
if (!img->inner->auxiliary_texture[0]) {
assert(!img->inner->auxiliary_texture[1]);
glGenTextures(texture_count, img->inner->auxiliary_texture);
glActiveTexture(GL_TEXTURE0);
for (int i = 0; i < texture_count; i++) {
glBindTexture(GL_TEXTURE_2D, img->inner->auxiliary_texture[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR,
(GLint[]){0, 0, 0, 0});
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, img->inner->width,
img->inner->height, 0, GL_BGR, GL_UNSIGNED_BYTE, NULL);
}
}
// Prepare framebuffer used for rendering and bind it
@ -285,6 +292,8 @@ static GLuint gl_average_texture_color(backend_t *base, struct gl_image *img) {
// Enable shaders
glUseProgram(gd->brightness_shader.prog);
glUniform2f(glGetUniformLocationChecked(gd->brightness_shader.prog, "texsize"),
(GLfloat)img->inner->width, (GLfloat)img->inner->height);
// Prepare vertex attributes
GLuint vao;
@ -296,8 +305,7 @@ static GLuint gl_average_texture_color(backend_t *base, struct gl_image *img) {
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bo[1]);
glEnableVertexAttribArray(vert_coord_loc);
glEnableVertexAttribArray(vert_in_texcoord_loc);
glVertexAttribPointer(vert_coord_loc, 2, GL_INT, GL_FALSE,
sizeof(GLint) * 4, NULL);
glVertexAttribPointer(vert_coord_loc, 2, GL_INT, GL_FALSE, sizeof(GLint) * 4, NULL);
glVertexAttribPointer(vert_in_texcoord_loc, 2, GL_INT, GL_FALSE,
sizeof(GLint) * 4, (void *)(sizeof(GLint) * 2));
@ -305,13 +313,13 @@ static GLuint gl_average_texture_color(backend_t *base, struct gl_image *img) {
GLint coord[16] = {0};
GLuint indices[] = {0, 1, 2, 2, 3, 0};
glBufferData(GL_ARRAY_BUFFER, (long)sizeof(*coord) * 16, coord, GL_DYNAMIC_DRAW);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, (long)sizeof(*indices) * 6, indices, GL_STATIC_DRAW);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, (long)sizeof(*indices) * 6, indices,
GL_STATIC_DRAW);
// Do actual recursive render to 1x1 texture
GLuint result_texture = _gl_average_texture_color(base, img->inner->texture,
textures[0], textures[1],
fbo, img->inner->width,
img->inner->height);
GLuint result_texture = _gl_average_texture_color(
base, img->inner->texture, img->inner->auxiliary_texture[0],
img->inner->auxiliary_texture[1], fbo, img->inner->width, img->inner->height);
// Cleanup vertex attributes
glDisableVertexAttribArray(vert_coord_loc);
@ -332,10 +340,6 @@ static GLuint gl_average_texture_color(backend_t *base, struct gl_image *img) {
// Cleanup render textures
glBindTexture(GL_TEXTURE_2D, 0);
for (int i = 0; i < texture_count; i++) {
if (result_texture != textures[i])
glDeleteTextures(1, &textures[i]);
}
gl_check_err();
@ -362,8 +366,9 @@ static void _gl_compose(backend_t *base, struct gl_image *img, GLuint target,
}
GLuint brightness = 0;
if (img->max_brightness < 1.0)
if (img->max_brightness < 1.0) {
brightness = gl_average_texture_color(base, img);
}
assert(gd->win_shader.prog);
glUseProgram(gd->win_shader.prog);
@ -427,7 +432,6 @@ static void _gl_compose(backend_t *base, struct gl_image *img, GLuint target,
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glDeleteBuffers(2, bo);
glDeleteTextures(1, &brightness);
glUseProgram(0);
@ -758,7 +762,8 @@ static int gl_win_shader_from_string(const char *vshader_str, const char *fshade
ret->unifm_tex = glGetUniformLocationChecked(ret->prog, "tex");
ret->unifm_dim = glGetUniformLocationChecked(ret->prog, "dim");
ret->unifm_brightness = glGetUniformLocationChecked(ret->prog, "brightness");
ret->unifm_max_brightness = glGetUniformLocationChecked(ret->prog, "max_brightness");
ret->unifm_max_brightness =
glGetUniformLocationChecked(ret->prog, "max_brightness");
glUseProgram(ret->prog);
int orig_loc = glGetUniformLocation(ret->prog, "orig");
@ -842,12 +847,13 @@ static const char interpolating_frag[] = GLSL(330,
static const char interpolating_vert[] = GLSL(330,
uniform mat4 projection;
uniform vec2 texsize;
layout(location = 0) in vec2 in_coord;
layout(location = 1) in vec2 in_texcoord;
out vec2 texcoord;
void main() {
gl_Position = projection * vec4(in_coord, 0, 1);
texcoord = in_texcoord;
texcoord = in_texcoord / texsize;
}
);
// clang-format on
@ -929,6 +935,7 @@ void gl_release_image(backend_t *base, void *image_data) {
assert(wd->inner->user_data == NULL);
glDeleteTextures(1, &wd->inner->texture);
glDeleteTextures(2, wd->inner->auxiliary_texture);
free(wd->inner);
free(wd);
gl_check_err();
@ -1155,7 +1162,7 @@ const char *win_shader_glsl = GLSL(330,
}
c = vec4(c.rgb * (1.0 - dim), c.a) * opacity;
vec3 rgb_brightness = texture2D(brightness, vec2(0.5, 0.5), 0).rgb;
vec3 rgb_brightness = texelFetch(brightness, ivec2(0, 0), 0).rgb;
float brightness = (rgb_brightness[0] + rgb_brightness[1] + rgb_brightness[2]) / 3;
if (brightness > max_brightness)
c.rgb = c.rgb * (max_brightness / brightness);
@ -1219,7 +1226,8 @@ bool gl_init(struct gl_data *gd, session_t *ps) {
glUniform1i(glGetUniformLocationChecked(gd->present_prog, "tex"), 0);
glUseProgram(0);
gd->brightness_shader.prog = gl_create_program_from_str(interpolating_vert, interpolating_frag);
gd->brightness_shader.prog =
gl_create_program_from_str(interpolating_vert, interpolating_frag);
if (!gd->brightness_shader.prog) {
log_error("Failed to create the brightness shader");
return false;
@ -1403,8 +1411,7 @@ void gl_present(backend_t *base, const region_t *region) {
glBufferData(GL_ELEMENT_ARRAY_BUFFER, (long)sizeof(GLuint) * nrects * 6, indices,
GL_STREAM_DRAW);
glVertexAttribPointer(vert_coord_loc, 2, GL_INT, GL_FALSE,
sizeof(GLint) * 2, NULL);
glVertexAttribPointer(vert_coord_loc, 2, GL_INT, GL_FALSE, sizeof(GLint) * 2, NULL);
glDrawElements(GL_TRIANGLES, nrects * 6, GL_UNSIGNED_INT, NULL);
glBindBuffer(GL_ARRAY_BUFFER, 0);
@ -1438,9 +1445,7 @@ bool gl_image_op(backend_t *base, enum image_operations op, void *image_data,
tex->ewidth = iargs[0];
tex->eheight = iargs[1];
break;
case IMAGE_OP_MAX_BRIGHTNESS:
tex->max_brightness = *(double *)arg;
break;
case IMAGE_OP_MAX_BRIGHTNESS: tex->max_brightness = *(double *)arg; break;
}
return true;

3
src/backend/gl/gl_common.h
View File

@ -47,6 +47,9 @@ struct gl_texture {
GLuint texture;
int width, height;
bool y_inverted;
// Textures for auxiliary uses.
GLuint auxiliary_texture[2];
void *user_data;
};