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gtk2/gsk/ngl/gskngluniformstateprivate.h
Christian Hergert f97ce21e59 ngl: reintroduce comparison checks 
This reduces how many changes we make when recording uniform state, which
increases the chances that the data offset will be the same when applying
uniforms.
2021-03-12 11:47:15 -08:00

869 lines
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/* gskngluniformstateprivate.h
*
* Copyright 2020 Christian Hergert <chergert@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#ifndef GSK_NGL_UNIFORM_STATE_PRIVATE_H
#define GSK_NGL_UNIFORM_STATE_PRIVATE_H
#include "gskngltypesprivate.h"
G_BEGIN_DECLS
typedef struct { float v0; } Uniform1f;
typedef struct { float v0; float v1; } Uniform2f;
typedef struct { float v0; float v1; float v2; } Uniform3f;
typedef struct { float v0; float v1; float v2; float v3; } Uniform4f;
typedef struct { int v0; } Uniform1i;
typedef struct { int v0; int v1; } Uniform2i;
typedef struct { int v0; int v1; int v2; } Uniform3i;
typedef struct { int v0; int v1; int v2; int v3; } Uniform4i;
typedef struct { guint v0; } Uniform1ui;
#define GSK_NGL_UNIFORM_ARRAY_BITS 5
#define GSK_NGL_UNIFORM_FORMAT_BITS 5
#define GSK_NGL_UNIFORM_OFFSET_BITS 21
typedef struct _GskNglUniformInfo
{
guint initial : 1;
guint format : GSK_NGL_UNIFORM_FORMAT_BITS;
guint array_count : GSK_NGL_UNIFORM_ARRAY_BITS;
guint offset : GSK_NGL_UNIFORM_OFFSET_BITS;
} GskNglUniformInfo;
G_STATIC_ASSERT (sizeof (GskNglUniformInfo) == 4);
typedef struct _GskNglUniformInfoElement
{
GskNglUniformInfo info;
guint stamp;
} GskNglUniformInfoElement;
G_STATIC_ASSERT (sizeof (GskNglUniformInfoElement) == 8);
typedef struct _GskNglUniformProgram
{
guint program_id;
guint n_uniforms : 12;
guint has_attachments : 1;
/* To avoid walking our 1:1 array of location->uniform slots, we have
* a sparse index that allows us to skip the empty zones.
*/
guint *sparse;
guint n_sparse;
/* Uniforms are provided inline at the end of structure to avoid
* an extra dereference.
*/
GskNglUniformInfoElement uniforms[0];
} GskNglUniformProgram;
typedef struct _GskNglUniformState
{
GHashTable *programs;
guint8 *values_buf;
guint values_pos;
guint values_len;
GskNglUniformInfo apply_hash[512];
} GskNglUniformState;
/**
* GskNglUniformStateCallback:
* @info: a pointer to the information about the uniform
* @location: the location of the uniform within the GPU program.
* @user_data: closure data for the callback
*
* This callback can be used to snapshot state of a program which
* is useful when batching commands so that the state may be compared
* with future evocations of the program.
*/
typedef void (*GskNglUniformStateCallback) (const GskNglUniformInfo *info,
guint location,
gpointer user_data);
typedef enum _GskNglUniformKind
{
GSK_NGL_UNIFORM_FORMAT_1F = 1,
GSK_NGL_UNIFORM_FORMAT_2F,
GSK_NGL_UNIFORM_FORMAT_3F,
GSK_NGL_UNIFORM_FORMAT_4F,
GSK_NGL_UNIFORM_FORMAT_1FV,
GSK_NGL_UNIFORM_FORMAT_2FV,
GSK_NGL_UNIFORM_FORMAT_3FV,
GSK_NGL_UNIFORM_FORMAT_4FV,
GSK_NGL_UNIFORM_FORMAT_1I,
GSK_NGL_UNIFORM_FORMAT_2I,
GSK_NGL_UNIFORM_FORMAT_3I,
GSK_NGL_UNIFORM_FORMAT_4I,
GSK_NGL_UNIFORM_FORMAT_1UI,
GSK_NGL_UNIFORM_FORMAT_TEXTURE,
GSK_NGL_UNIFORM_FORMAT_MATRIX,
GSK_NGL_UNIFORM_FORMAT_ROUNDED_RECT,
GSK_NGL_UNIFORM_FORMAT_COLOR,
GSK_NGL_UNIFORM_FORMAT_LAST
} GskNglUniformFormat;
G_STATIC_ASSERT (GSK_NGL_UNIFORM_FORMAT_LAST < (1 << GSK_NGL_UNIFORM_FORMAT_BITS));
GskNglUniformState *gsk_ngl_uniform_state_new (void);
GskNglUniformState *gsk_ngl_uniform_state_ref (GskNglUniformState *state);
void gsk_ngl_uniform_state_unref (GskNglUniformState *state);
GskNglUniformProgram *gsk_ngl_uniform_state_get_program (GskNglUniformState *state,
guint program,
guint n_uniforms);
void gsk_ngl_uniform_state_end_frame (GskNglUniformState *state);
gsize gsk_ngl_uniform_format_size (GskNglUniformFormat format);
gpointer gsk_ngl_uniform_state_init_value (GskNglUniformState *state,
GskNglUniformProgram *program,
GskNglUniformFormat format,
guint array_count,
guint location,
GskNglUniformInfoElement **infoptr);
#define GSK_NGL_UNIFORM_VALUE(base, offset) ((gpointer)((base) + ((offset) * 4)))
#define gsk_ngl_uniform_state_get_uniform_data(state,offset) GSK_NGL_UNIFORM_VALUE((state)->values_buf, offset)
#define gsk_ngl_uniform_state_snapshot(state, program_info, callback, user_data) \
G_STMT_START { \
for (guint z = 0; z < program_info->n_sparse; z++) \
{ \
guint location = program_info->sparse[z]; \
GskNglUniformInfoElement *info = &program_info->uniforms[location]; \
\
g_assert (location < GL_MAX_UNIFORM_LOCATIONS); \
g_assert (location < program_info->n_uniforms); \
\
if (info->info.format > 0) \
callback (&info->info, location, user_data); \
} \
} G_STMT_END
static inline gpointer
gsk_ngl_uniform_state_get_value (GskNglUniformState *state,
GskNglUniformProgram *program,
GskNglUniformFormat format,
guint array_count,
guint location,
guint stamp,
GskNglUniformInfoElement **infoptr)
{
GskNglUniformInfoElement *info;
if (location == (guint)-1)
return NULL;
/* If the stamp is the same, then we can ignore the request
* and short-circuit as early as possible. This requires the
* caller to increment their private stamp when they change
* internal state.
*
* This is generally used for the shared uniforms like projection,
* modelview, clip, etc to avoid so many comparisons which cost
* considerable CPU.
*/
info = &program->uniforms[location];
if (stamp != 0 && stamp == info->stamp)
return NULL;
if G_LIKELY (format == info->info.format && array_count <= info->info.array_count)
{
*infoptr = info;
return GSK_NGL_UNIFORM_VALUE (state->values_buf, info->info.offset);
}
return gsk_ngl_uniform_state_init_value (state, program, format, array_count, location, infoptr);
}
static inline guint
gsk_ngl_uniform_state_align (guint current_pos,
guint size)
{
guint align = size > 8 ? 16 : (size > 4 ? 8 : 4);
guint masked = current_pos & (align - 1);
g_assert (size > 0);
g_assert (align == 4 || align == 8 || align == 16);
g_assert (masked < align);
return align - masked;
}
static inline gpointer
gsk_ngl_uniform_state_realloc (GskNglUniformState *state,
guint size,
guint *offset)
{
guint padding = gsk_ngl_uniform_state_align (state->values_pos, size);
if G_UNLIKELY (state->values_len - padding - size < state->values_pos)
{
state->values_len *= 2;
state->values_buf = g_realloc (state->values_buf, state->values_len);
}
/* offsets are in slots of 4 to use fewer bits */
g_assert ((state->values_pos + padding) % 4 == 0);
*offset = (state->values_pos + padding) / 4;
state->values_pos += padding + size;
return GSK_NGL_UNIFORM_VALUE (state->values_buf, *offset);
}
#define GSK_NGL_UNIFORM_STATE_REPLACE(info, u, type, count) \
G_STMT_START { \
if ((info)->info.initial && count == (info)->info.array_count) \
{ \
u = GSK_NGL_UNIFORM_VALUE (state->values_buf, (info)->info.offset); \
} \
else \
{ \
guint offset; \
u = gsk_ngl_uniform_state_realloc (state, sizeof(type) * MAX (1, count), &offset); \
g_assert (offset < (1 << GSK_NGL_UNIFORM_OFFSET_BITS)); \
(info)->info.offset = offset; \
/* We might have increased array length */ \
(info)->info.array_count = count; \
} \
} G_STMT_END
static inline void
gsk_ngl_uniform_info_changed (GskNglUniformInfoElement *info,
guint location,
guint stamp)
{
info->stamp = stamp;
info->info.initial = FALSE;
}
static inline void
gsk_ngl_uniform_state_set1f (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
float value0)
{
Uniform1f *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != 0);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_1F, 1, location, stamp, &info)))
{
if (info->info.initial || u->v0 != value0)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform1f , 1);
u->v0 = value0;
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set2f (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
float value0,
float value1)
{
Uniform2f *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_2F, 1, location, stamp, &info)))
{
if (info->info.initial || u->v0 != value0 || u->v1 != value1)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform2f, 1);
u->v0 = value0;
u->v1 = value1;
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set3f (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
float value0,
float value1,
float value2)
{
Uniform3f *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_3F, 1, location, stamp, &info)))
{
if (info->info.initial || u->v0 != value0 || u->v1 != value1 || u->v2 != value2)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform3f, 1);
u->v0 = value0;
u->v1 = value1;
u->v2 = value2;
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set4f (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
float value0,
float value1,
float value2,
float value3)
{
Uniform4f *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_4F, 1, location, stamp, &info)))
{
if (info->info.initial || u->v0 != value0 || u->v1 != value1 || u->v2 != value2 || u->v3 != value3)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform4f, 1);
u->v0 = value0;
u->v1 = value1;
u->v2 = value2;
u->v3 = value3;
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set1ui (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
guint value0)
{
Uniform1ui *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_1UI, 1, location, stamp, &info)))
{
if (info->info.initial || u->v0 != value0)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform1ui, 1);
u->v0 = value0;
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set1i (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
int value0)
{
Uniform1i *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_1I, 1, location, stamp, &info)))
{
if (info->info.initial || u->v0 != value0)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform1i, 1);
u->v0 = value0;
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set2i (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
int value0,
int value1)
{
Uniform2i *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_2I, 1, location, stamp, &info)))
{
if (info->info.initial || u->v0 != value0 || u->v1 != value1)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform2i, 1);
u->v0 = value0;
u->v1 = value1;
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set3i (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
int value0,
int value1,
int value2)
{
Uniform3i *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_3I, 1, location, stamp, &info)))
{
if (info->info.initial || u->v0 != value0 || u->v1 != value1 || u->v2 != value2)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform3i, 1);
u->v0 = value0;
u->v1 = value1;
u->v2 = value2;
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set4i (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
int value0,
int value1,
int value2,
int value3)
{
Uniform4i *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_4I, 1, location, stamp, &info)))
{
if (info->info.initial || u->v0 != value0 || u->v1 != value1 || u->v2 != value2 || u->v3 != value3)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform4i, 1);
u->v0 = value0;
u->v1 = value1;
u->v2 = value2;
u->v3 = value3;
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set_rounded_rect (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
const GskRoundedRect *rounded_rect)
{
GskRoundedRect *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
g_assert (rounded_rect != NULL);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_ROUNDED_RECT, 1, location, stamp, &info)))
{
if (info->info.initial || memcmp (u, rounded_rect, sizeof *u) != 0)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, GskRoundedRect, 1);
memcpy (u, rounded_rect, sizeof *rounded_rect);
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set_matrix (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
const graphene_matrix_t *matrix)
{
graphene_matrix_t *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
g_assert (matrix != NULL);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_MATRIX, 1, location, stamp, &info)))
{
if (info->info.initial || memcmp (u, matrix, sizeof *u) != 0)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, graphene_matrix_t, 1);
memcpy (u, matrix, sizeof *matrix);
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
/**
* gsk_ngl_uniform_state_set_texture:
* @state: a #GskNglUniformState
* @program: the program id
* @location: the location of the texture
* @texture_slot: a texturing slot such as GL_TEXTURE0
*
* Sets the uniform expecting a texture to @texture_slot. This API
* expects a texture slot such as GL_TEXTURE0 to reduce chances of
* miss-use by the caller.
*
* The value stored to the uniform is in the form of 0 for GL_TEXTURE0,
* 1 for GL_TEXTURE1, and so on.
*/
static inline void
gsk_ngl_uniform_state_set_texture (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
guint texture_slot)
{
GskNglUniformInfoElement *info;
guint *u;
g_assert (texture_slot >= GL_TEXTURE0);
g_assert (texture_slot < GL_TEXTURE16);
texture_slot -= GL_TEXTURE0;
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_TEXTURE, 1, location, stamp, &info)))
{
if (info->info.initial || *u != texture_slot)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, guint, 1);
*u = texture_slot;
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
/**
* gsk_ngl_uniform_state_set_color:
* @state: a #GskNglUniformState
* @program: a program id > 0
* @location: the uniform location
* @color: a color to set or %NULL for transparent
*
* Sets a uniform to the color described by @color. This is a convenience
* function to allow callers to avoid having to translate colors to floats
* in other portions of the renderer.
*/
static inline void
gsk_ngl_uniform_state_set_color (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
const GdkRGBA *color)
{
static const GdkRGBA transparent = {0};
GskNglUniformInfoElement *info;
GdkRGBA *u;
g_assert (state != NULL);
g_assert (program != NULL);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_COLOR, 1, location, stamp, &info)))
{
if (color == NULL)
color = &transparent;
if (info->info.initial || memcmp (color, u, sizeof *u) != 0)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, GdkRGBA, 1);
memcpy (u, color, sizeof *color);
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set1fv (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
guint count,
const float *value)
{
Uniform1f *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
g_assert (count > 0);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_1FV, count, location, stamp, &info)))
{
if (info->info.initial || count != info->info.array_count || memcmp (u, value, sizeof *u * count) != 0)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform1f, count);
memcpy (u, value, sizeof (Uniform1f) * count);
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set2fv (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
guint count,
const float *value)
{
Uniform2f *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
g_assert (count > 0);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_2FV, count, location, stamp, &info)))
{
if (info->info.initial || count != info->info.array_count || memcmp (u, value, sizeof *u * count) != 0)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform2f, count);
memcpy (u, value, sizeof (Uniform2f) * count);
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set3fv (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
guint count,
const float *value)
{
Uniform3f *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
g_assert (count > 0);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_3FV, count, location, stamp, &info)))
{
if (info->info.initial || count != info->info.array_count || memcmp (u, value, sizeof *u * count) != 0)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform3f, count);
memcpy (u, value, sizeof (Uniform3f) * count);
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline void
gsk_ngl_uniform_state_set4fv (GskNglUniformState *state,
GskNglUniformProgram *program,
guint location,
guint stamp,
guint count,
const float *value)
{
Uniform4f *u;
GskNglUniformInfoElement *info;
g_assert (state != NULL);
g_assert (program != NULL);
g_assert (count > 0);
if ((u = gsk_ngl_uniform_state_get_value (state, program, GSK_NGL_UNIFORM_FORMAT_4FV, count, location, stamp, &info)))
{
if (info->info.initial || count != info->info.array_count || memcmp (u, value, sizeof *u * count) != 0)
{
GSK_NGL_UNIFORM_STATE_REPLACE (info, u, Uniform4f, count);
memcpy (u, value, sizeof (Uniform4f) * count);
gsk_ngl_uniform_info_changed (info, location, stamp);
}
}
}
static inline guint
gsk_ngl_uniform_state_fmix (guint program,
guint location)
{
guint h = (program << 16) | location;
h ^= h >> 16;
h *= 0x85ebca6b;
h ^= h >> 13;
h *= 0xc2b2ae35;
h ^= h >> 16;
return h;
}
/*
* gsk_ngl_uniform_state_apply:
* @state: the uniform state
* @program: the program id
* @location: the location of the uniform
* @offset: the offset of the data within the buffer
* @info: the uniform info
*
* This function can be used to apply state that was previously recorded
* by the #GskNglUniformState.
*
* It is specifically useful from the GskNglCommandQueue to execute uniform
* changes but only when they have changed from the current value.
*/
static inline void
gsk_ngl_uniform_state_apply (GskNglUniformState *state,
guint program,
guint location,
GskNglUniformInfo info)
{
guint index = gsk_ngl_uniform_state_fmix (program, location) % G_N_ELEMENTS (state->apply_hash);
gconstpointer dataptr = GSK_NGL_UNIFORM_VALUE (state->values_buf, info.offset);
/* aligned, can treat as unsigned */
if (*(guint *)&info == *(guint *)&state->apply_hash[index])
return;
state->apply_hash[index] = info;
/* TODO: We could do additional comparisons here to make sure we are
* changing state.
*/
switch (info.format)
{
case GSK_NGL_UNIFORM_FORMAT_1F:
glUniform1fv (location, 1, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_2F:
glUniform2fv (location, 1, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_3F:
glUniform3fv (location, 1, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_4F:
glUniform4fv (location, 1, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_1FV:
glUniform1fv (location, info.array_count, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_2FV:
glUniform2fv (location, info.array_count, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_3FV:
glUniform3fv (location, info.array_count, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_4FV:
glUniform4fv (location, info.array_count, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_1I:
case GSK_NGL_UNIFORM_FORMAT_TEXTURE:
glUniform1iv (location, 1, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_2I:
glUniform2iv (location, 1, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_3I:
glUniform3iv (location, 1, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_4I:
glUniform4iv (location, 1, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_1UI:
glUniform1uiv (location, 1, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_MATRIX: {
float mat[16];
graphene_matrix_to_float (dataptr, mat);
glUniformMatrix4fv (location, 1, GL_FALSE, mat);
#if 0
/* TODO: If Graphene can give us a peek here on platforms
* where the format is float[16] (most/all x86_64?) then
* We can avoid the SIMD operation to convert the format.
*/
G_STATIC_ASSERT (sizeof (graphene_matrix_t) == 16*4);
glUniformMatrix4fv (location, 1, GL_FALSE, dataptr);
#endif
}
break;
case GSK_NGL_UNIFORM_FORMAT_COLOR:
glUniform4fv (location, 1, dataptr);
break;
case GSK_NGL_UNIFORM_FORMAT_ROUNDED_RECT:
glUniform4fv (location, 3, dataptr);
break;
default:
g_assert_not_reached ();
}
}
G_END_DECLS
#endif /* GSK_NGL_UNIFORM_STATE_PRIVATE_H */
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