[gtk/matthiasc/color-profiles] ngl: Do texture conversions in shaders
- From: Matthias Clasen <matthiasc src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk/matthiasc/color-profiles] ngl: Do texture conversions in shaders
- Date: Sat, 2 Oct 2021 19:56:51 +0000 (UTC)
commit 6635be61ac626e80f9044f412f880479467ee5cf
Author: Matthias Clasen <mclasen redhat com>
Date: Sat Oct 2 11:45:26 2021 -0400
ngl: Do texture conversions in shaders
Do linearization and premultiplication of textures
in a shader after uploading the unconverted data.
This moves move work from the cpu to the gpu.
Conversions between other colorspaces are still
done with lcms on the cpu.
gsk/meson.build | 2 +
gsk/ngl/gsknglcommandqueue.c | 68 ++++++++++++----
gsk/ngl/gsknglcommandqueueprivate.h | 9 ++-
gsk/ngl/gskngldriver.c | 111 +++++++++++++++++++++------
gsk/ngl/gsknglprograms.defs | 8 ++
gsk/ngl/resources/linearize_premultiply.glsl | 21 +++++
gsk/ngl/resources/premultiply.glsl | 20 +++++
7 files changed, 196 insertions(+), 43 deletions(-)
---
diff --git a/gsk/meson.build b/gsk/meson.build
index 7c1442cfd6..49655afbb0 100644
--- a/gsk/meson.build
+++ b/gsk/meson.build
@@ -21,6 +21,8 @@ gsk_private_ngl_shaders = [
'ngl/resources/filled_border.glsl',
'ngl/resources/postprocessing.glsl',
'ngl/resources/linearize.glsl',
+ 'ngl/resources/premultiply.glsl',
+ 'ngl/resources/linearize_premultiply.glsl',
]
gsk_public_sources = files([
diff --git a/gsk/ngl/gsknglcommandqueue.c b/gsk/ngl/gsknglcommandqueue.c
index dbcbbf9ca2..1c299e9542 100644
--- a/gsk/ngl/gsknglcommandqueue.c
+++ b/gsk/ngl/gsknglcommandqueue.c
@@ -530,7 +530,7 @@ gsk_ngl_command_queue_begin_draw (GskNglCommandQueue *self,
GskNglCommandBatch *batch;
g_assert (GSK_IS_NGL_COMMAND_QUEUE (self));
- g_assert (self->in_draw == FALSE);
+ g_assert (!self->in_draw);
g_assert (width <= G_MAXUINT16);
g_assert (height <= G_MAXUINT16);
@@ -568,6 +568,7 @@ gsk_ngl_command_queue_end_draw (GskNglCommandQueue *self)
GskNglCommandBatch *batch;
g_assert (GSK_IS_NGL_COMMAND_QUEUE (self));
+ g_assert (self->in_draw);
g_assert (self->batches.len > 0);
if (will_ignore_batch (self))
@@ -1331,20 +1332,31 @@ gsk_ngl_command_queue_do_upload_texture (GdkGLContext *context,
int y,
int width,
int height,
- guint texture_target)
+ guint texture_target,
+ GskConversion *conversion)
{
GdkMemoryTexture *memory_texture;
GdkMemoryFormat data_format;
+ GdkColorProfile *data_profile;
GLenum gl_internalformat;
GLenum gl_format;
GLenum gl_type;
gsize bpp, stride;
const guchar *data;
+ gboolean convert_locally = FALSE;
g_return_if_fail (GDK_IS_GL_CONTEXT (context));
memory_texture = GDK_MEMORY_TEXTURE (gdk_texture_download_texture (texture));
data_format = gdk_memory_texture_get_format (memory_texture);
+ data_profile = gdk_texture_get_color_profile (GDK_TEXTURE (memory_texture));
+
+ if (data_profile == gdk_color_profile_get_srgb ())
+ *conversion = GSK_CONVERSION_LINEARIZE;
+ else if (data_profile == gdk_color_profile_get_srgb_linear ())
+ *conversion = 0;
+ else
+ convert_locally = TRUE;
if (!gdk_memory_format_gl_format (data_format,
gdk_gl_context_get_use_es (context),
@@ -1352,21 +1364,33 @@ gsk_ngl_command_queue_do_upload_texture (GdkGLContext *context,
&gl_format,
&gl_type))
{
- data_format = GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
- if (!gdk_memory_format_gl_format (GDK_MEMORY_R8G8B8A8_PREMULTIPLIED,
- gdk_gl_context_get_use_es (context),
- &gl_internalformat,
- &gl_format,
- &gl_type))
+ if (!gdk_gl_context_get_use_es (context))
{
- g_assert_not_reached ();
+ *conversion |= GSK_CONVERSION_PREMULTIPLY;
+ }
+ else
+ {
+ convert_locally = TRUE;
+ data_format = GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
+ if (!gdk_memory_format_gl_format (GDK_MEMORY_R8G8B8A8_PREMULTIPLIED,
+ gdk_gl_context_get_use_es (context),
+ &gl_internalformat,
+ &gl_format,
+ &gl_type))
+ {
+ g_assert_not_reached ();
+ }
}
}
- memory_texture = gdk_memory_texture_convert (memory_texture,
- data_format,
- gdk_color_profile_get_srgb_linear (),
- &(GdkRectangle) { x, y, width, height });
+ if (convert_locally)
+ {
+ memory_texture = gdk_memory_texture_convert (memory_texture,
+ data_format,
+ gdk_color_profile_get_srgb_linear (),
+ &(GdkRectangle) { x, y, width, height });
+ *conversion = 0;
+ }
bpp = gdk_memory_format_bytes_per_pixel (data_format);
stride = gdk_memory_texture_get_stride (memory_texture);
@@ -1412,9 +1436,11 @@ gsk_ngl_command_queue_upload_texture (GskNglCommandQueue *self,
guint width,
guint height,
int min_filter,
- int mag_filter)
+ int mag_filter,
+ GskConversion *conversion)
{
G_GNUC_UNUSED gint64 start_time = GDK_PROFILER_CURRENT_TIME;
+ int format;
int texture_id;
g_assert (GSK_IS_NGL_COMMAND_QUEUE (self));
@@ -1424,6 +1450,8 @@ gsk_ngl_command_queue_upload_texture (GskNglCommandQueue *self,
g_assert (min_filter == GL_LINEAR || min_filter == GL_NEAREST);
g_assert (mag_filter == GL_LINEAR || min_filter == GL_NEAREST);
+ *conversion = 0;
+
if (width > self->max_texture_size || height > self->max_texture_size)
{
g_warning ("Attempt to create texture of size %ux%u but max size is %d. "
@@ -1433,7 +1461,12 @@ gsk_ngl_command_queue_upload_texture (GskNglCommandQueue *self,
height = MAX (height, self->max_texture_size);
}
- texture_id = gsk_ngl_command_queue_create_texture (self, width, height, GL_RGBA8, min_filter, mag_filter);
+ format = gdk_texture_is_hdr (texture) ? GL_RGBA16F : GL_RGBA8;
+
+ texture_id = gsk_ngl_command_queue_create_texture (self,
+ width, height,
+ format,
+ min_filter, mag_filter);
if (texture_id == -1)
return texture_id;
@@ -1443,11 +1476,12 @@ gsk_ngl_command_queue_upload_texture (GskNglCommandQueue *self,
glActiveTexture (GL_TEXTURE0);
glBindTexture (GL_TEXTURE_2D, texture_id);
- gsk_ngl_command_queue_do_upload_texture (gdk_gl_context_get_current (),
+ gsk_ngl_command_queue_do_upload_texture (self->context,
texture,
x_offset, y_offset,
width, height,
- GL_TEXTURE_2D);
+ GL_TEXTURE_2D,
+ conversion);
/* Restore previous texture state if any */
if (self->attachments->textures[0].id > 0)
diff --git a/gsk/ngl/gsknglcommandqueueprivate.h b/gsk/ngl/gsknglcommandqueueprivate.h
index 40cca01162..4e7ac594ad 100644
--- a/gsk/ngl/gsknglcommandqueueprivate.h
+++ b/gsk/ngl/gsknglcommandqueueprivate.h
@@ -279,6 +279,12 @@ void gsk_ngl_command_queue_execute (GskNglCommandQue
guint surface_height,
guint scale_factor,
const cairo_region_t *scissor);
+
+typedef enum {
+ GSK_CONVERSION_LINEARIZE = 1 << 0,
+ GSK_CONVERSION_PREMULTIPLY = 1 << 1,
+} GskConversion;
+
int gsk_ngl_command_queue_upload_texture (GskNglCommandQueue *self,
GdkTexture *texture,
guint x_offset,
@@ -286,7 +292,8 @@ int gsk_ngl_command_queue_upload_texture (GskNglCommandQue
guint width,
guint height,
int min_filter,
- int mag_filter);
+ int mag_filter,
+ GskConversion *remaining);
int gsk_ngl_command_queue_create_texture (GskNglCommandQueue *self,
int width,
int height,
diff --git a/gsk/ngl/gskngldriver.c b/gsk/ngl/gskngldriver.c
index 993dad11a8..a3e3e6b040 100644
--- a/gsk/ngl/gskngldriver.c
+++ b/gsk/ngl/gskngldriver.c
@@ -730,9 +730,10 @@ draw_offscreen (GskNglCommandQueue *command_queue,
}
static void
-set_viewport_for_size (GskNglProgram *program,
- float width,
- float height)
+set_viewport_for_size (GskNglDriver *self,
+ GskNglProgram *program,
+ float width,
+ float height)
{
float viewport[4] = { 0, 0, width, height };
@@ -741,15 +742,17 @@ set_viewport_for_size (GskNglProgram *program,
UNIFORM_SHARED_VIEWPORT, 0,
1,
(const float *)&viewport);
+ self->stamps[UNIFORM_SHARED_VIEWPORT]++;
}
#define ORTHO_NEAR_PLANE -10000
#define ORTHO_FAR_PLANE 10000
static void
-set_projection_for_size (GskNglProgram *program,
- float width,
- float height)
+set_projection_for_size (GskNglDriver *self,
+ GskNglProgram *program,
+ float width,
+ float height)
{
graphene_matrix_t projection;
@@ -760,10 +763,12 @@ set_projection_for_size (GskNglProgram *program,
program->program_info,
UNIFORM_SHARED_PROJECTION, 0,
&projection);
+ self->stamps[UNIFORM_SHARED_PROJECTION]++;
}
static void
-reset_modelview (GskNglProgram *program)
+reset_modelview (GskNglDriver *self,
+ GskNglProgram *program)
{
graphene_matrix_t modelview;
@@ -773,25 +778,38 @@ reset_modelview (GskNglProgram *program)
program->program_info,
UNIFORM_SHARED_MODELVIEW, 0,
&modelview);
+ self->stamps[UNIFORM_SHARED_MODELVIEW]++;
}
static GskNglTexture *
-gsk_ngl_driver_convert_texture (GskNglDriver *self,
- int texture_id,
- int width,
- int height,
- int format)
+gsk_ngl_driver_convert_texture (GskNglDriver *self,
+ int texture_id,
+ int width,
+ int height,
+ int format,
+ int min_filter,
+ int mag_filter,
+ GskConversion conversion)
{
GskNglRenderTarget *target;
int prev_fbo;
- GskNglProgram *program = self->linearize_no_clip;
+ GskNglProgram *program;
+
+ if (conversion == (GSK_CONVERSION_LINEARIZE | GSK_CONVERSION_PREMULTIPLY))
+ program = self->linearize_premultiply_no_clip;
+ else if (conversion & GSK_CONVERSION_LINEARIZE)
+ program = self->linearize_no_clip;
+ else if (conversion & GSK_CONVERSION_PREMULTIPLY)
+ program = self->premultiply_no_clip;
+ else
+ g_assert_not_reached ();
gdk_gl_context_make_current (self->command_queue->context);
gsk_ngl_driver_create_render_target (self,
width, height,
format,
- GL_LINEAR, GL_LINEAR,
+ min_filter, mag_filter,
&target);
prev_fbo = gsk_ngl_command_queue_bind_framebuffer (self->command_queue, target->framebuffer_id);
@@ -801,14 +819,13 @@ gsk_ngl_driver_convert_texture (GskNglDriver *self,
program->program_info,
width, height);
- set_projection_for_size (program, width, height);
- set_viewport_for_size (program, width, height);
- reset_modelview (program);
+ set_projection_for_size (self, program, width, height);
+ set_viewport_for_size (self, program, width, height);
+ reset_modelview (self, program);
gsk_ngl_program_set_uniform_texture (program,
UNIFORM_SHARED_SOURCE, 0,
GL_TEXTURE_2D, GL_TEXTURE0, texture_id);
-
draw_offscreen (self->command_queue, 0, 0, width, height);
gsk_ngl_command_queue_end_draw (self->command_queue);
@@ -856,6 +873,7 @@ gsk_ngl_driver_load_texture (GskNglDriver *self,
int height;
int width;
int format;
+ GskConversion conversion;
g_return_val_if_fail (GSK_IS_NGL_DRIVER (self), 0);
g_return_val_if_fail (GDK_IS_TEXTURE (texture), 0);
@@ -895,10 +913,14 @@ gsk_ngl_driver_load_texture (GskNglDriver *self,
* is nonlinear sRGB. Eventually, we should figure out how
* to convert from other color spaces to linear sRGB
*/
+ t = gsk_ngl_driver_convert_texture (self,
+ gl_texture_id,
+ width, height, format,
+ min_filter, mag_filter,
+ GSK_CONVERSION_LINEARIZE);
- t = gsk_ngl_driver_convert_texture (self, gl_texture_id, width, height, format);
- if (gdk_texture_set_render_data (texture, self, t, (GDestroyNotify)gsk_ngl_texture_destroyed))
+ if (gdk_texture_set_render_data (texture, self, t, gsk_ngl_texture_destroyed))
t->user = texture;
return t->texture_id;
@@ -909,7 +931,8 @@ gsk_ngl_driver_load_texture (GskNglDriver *self,
downloaded_texture = gdk_texture_download_texture (texture);
/* The download_texture() call may have switched the GL context. Make sure
- * the right context is at work again. */
+ * the right context is at work again.
+ */
gdk_gl_context_make_current (context);
texture_id = gsk_ngl_command_queue_upload_texture (self->command_queue,
@@ -919,9 +942,8 @@ gsk_ngl_driver_load_texture (GskNglDriver *self,
width,
height,
min_filter,
- mag_filter);
-
- g_clear_object (&downloaded_texture);
+ mag_filter,
+ &conversion);
t = gsk_ngl_texture_new (texture_id,
width, height, format, min_filter, mag_filter,
@@ -929,6 +951,15 @@ gsk_ngl_driver_load_texture (GskNglDriver *self,
g_hash_table_insert (self->textures, GUINT_TO_POINTER (texture_id), t);
+ g_clear_object (&downloaded_texture);
+
+ if (conversion)
+ t = gsk_ngl_driver_convert_texture (self,
+ texture_id,
+ width, height, format,
+ min_filter, mag_filter,
+ conversion);
+
if (gdk_texture_set_render_data (texture, self, t, gsk_ngl_texture_destroyed))
t->user = texture;
@@ -976,6 +1007,7 @@ gsk_ngl_driver_create_texture (GskNglDriver *self,
g_hash_table_insert (self->textures,
GUINT_TO_POINTER (texture->texture_id),
texture);
+
texture->last_used_in_frame = self->current_frame_id;
return texture;
}
@@ -1335,6 +1367,7 @@ gsk_ngl_driver_add_texture_slices (GskNglDriver *self,
int tex_width;
int tex_height;
int x = 0, y = 0;
+ int format;
g_assert (GSK_IS_NGL_DRIVER (self));
g_assert (GDK_IS_TEXTURE (texture));
@@ -1346,6 +1379,9 @@ gsk_ngl_driver_add_texture_slices (GskNglDriver *self,
tex_width = texture->width;
tex_height = texture->height;
+
+ format = gdk_texture_is_hdr (texture) ? GL_RGBA16F : GL_RGBA8;
+
cols = (texture->width / max_texture_size) + 1;
rows = (texture->height / max_texture_size) + 1;
@@ -1368,12 +1404,37 @@ gsk_ngl_driver_add_texture_slices (GskNglDriver *self,
int slice_height = MIN (max_texture_size, texture->height - y);
int slice_index = (col * rows) + row;
guint texture_id;
+ GskConversion conversion;
texture_id = gsk_ngl_command_queue_upload_texture (self->command_queue,
texture,
x, y,
slice_width, slice_height,
- GL_NEAREST, GL_NEAREST);
+ GL_NEAREST, GL_NEAREST,
+ &conversion);
+
+
+ if (conversion)
+ {
+ t = gsk_ngl_texture_new (texture_id,
+ slice_width, slice_height,
+ format,
+ GL_NEAREST, GL_NEAREST,
+ 0);
+ g_hash_table_insert (self->textures, GUINT_TO_POINTER (texture_id), t);
+
+ t = gsk_ngl_driver_convert_texture (self,
+ texture_id,
+ slice_width, slice_height,
+ format,
+ GL_NEAREST, GL_NEAREST,
+ conversion);
+
+ texture_id = t->texture_id;
+ t->texture_id = 0;
+ g_hash_table_steal (self->textures, GUINT_TO_POINTER (texture_id));
+ gsk_ngl_texture_free (t);
+ }
slices[slice_index].rect.x = x;
slices[slice_index].rect.y = y;
diff --git a/gsk/ngl/gsknglprograms.defs b/gsk/ngl/gsknglprograms.defs
index 1454e56770..974f4512e5 100644
--- a/gsk/ngl/gsknglprograms.defs
+++ b/gsk/ngl/gsknglprograms.defs
@@ -90,3 +90,11 @@ GSK_NGL_DEFINE_PROGRAM (postprocessing,
GSK_NGL_DEFINE_PROGRAM (linearize,
"/org/gtk/libgsk/ngl/linearize.glsl",
GSK_NGL_NO_UNIFORMS)
+
+GSK_NGL_DEFINE_PROGRAM (premultiply,
+ "/org/gtk/libgsk/ngl/premultiply.glsl",
+ GSK_NGL_NO_UNIFORMS)
+
+GSK_NGL_DEFINE_PROGRAM (linearize_premultiply,
+ "/org/gtk/libgsk/ngl/linearize_premultiply.glsl",
+ GSK_NGL_NO_UNIFORMS)
diff --git a/gsk/ngl/resources/linearize_premultiply.glsl b/gsk/ngl/resources/linearize_premultiply.glsl
new file mode 100644
index 0000000000..85a37c4ca3
--- /dev/null
+++ b/gsk/ngl/resources/linearize_premultiply.glsl
@@ -0,0 +1,21 @@
+
+// VERTEX_SHADER:
+// linearize_premultiply.glsl
+
+void main() {
+ gl_Position = u_projection * u_modelview * vec4(aPosition, 0.0, 1.0);
+
+ vUv = vec2(aUv.x, aUv.y);
+}
+
+// FRAGMENT_SHADER:
+// linearize_premultiply.glsl
+
+void main() {
+ vec4 diffuse = GskTexture(u_source, vUv);
+
+ diffuse = gsk_srgb_to_linear(diffuse);
+ diffuse = gsk_premultiply(diffuse);
+
+ gskSetOutputColor(diffuse);
+}
diff --git a/gsk/ngl/resources/premultiply.glsl b/gsk/ngl/resources/premultiply.glsl
new file mode 100644
index 0000000000..b83ce9e90e
--- /dev/null
+++ b/gsk/ngl/resources/premultiply.glsl
@@ -0,0 +1,20 @@
+
+// VERTEX_SHADER:
+// premultiply.glsl
+
+void main() {
+ gl_Position = u_projection * u_modelview * vec4(aPosition, 0.0, 1.0);
+
+ vUv = vec2(aUv.x, aUv.y);
+}
+
+// FRAGMENT_SHADER:
+// premultiply.glsl
+
+void main() {
+ vec4 diffuse = GskTexture(u_source, vUv);
+
+ diffuse = gsk_premultiply(diffuse);
+
+ gskSetOutputColor(diffuse);
+}
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