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[cogl-texture] Split CoglTexture into an abstract class + CoglTexture2dSliced

Browse Source 
cogl-texture-2d-sliced provides an implementation of CoglTexture and this
seperation lays the foundation for potentially supporting atlas textures,
pixmap textures (as in GLX_EXT_texture_from_pixmap) and fast-path
GL_TEXTURE_{1D,2D,3D,RECTANGLE} textures in a maintainable fashion.
This commit is contained in:
Vladimir Nadvornik 2009-08-30 12:36:11 +02:00 committed by Robert Bragg
parent c40d5ae9ea
commit 65015a137e
13 changed files with 2565 additions and 1871 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
cogl/Makefile.am
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@ -114,8 +114,10 @@ libclutter_cogl_la_SOURCES = \
cogl-blend-string.h \
cogl-debug.c \
cogl-texture-private.h \
cogl-texture-2d-sliced-private.h \
cogl-texture-driver.h \
cogl-texture.c \
cogl-texture-2d-sliced.c \
$(NULL)
EXTRA_DIST += stb_image.c cogl-enum-types.h.in cogl-enum-types.c.in

2
cogl/cogl-context.c
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@ -100,6 +100,8 @@ cogl_create_context (void)
_context->quad_indices_short = COGL_INVALID_HANDLE;
_context->quad_indices_short_len = 0;
_context->texture_download_material = COGL_INVALID_HANDLE;
/* Initialise the clip stack */
_cogl_clip_stack_state_init ();

2
cogl/cogl-context.h
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@ -115,6 +115,8 @@ typedef struct
guint viewport_width;
guint viewport_height;
CoglHandle texture_download_material;
CoglContextDriver drv;
} CoglContext;

4
cogl/cogl-handle.h
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@ -81,7 +81,7 @@ typedef struct _CoglHandleObject
\
static CoglHandleClass _cogl_##type_name##_class; \
\
static GQuark \
GQuark \
_cogl_handle_##type_name##_get_type (void) \
{ \
static GQuark type = 0; \
@ -93,7 +93,7 @@ _cogl_handle_##type_name##_get_type (void) \
static CoglHandle \
_cogl_##type_name##_handle_new (Cogl##TypeName *new_obj) \
{ \
CoglHandleObject *obj = &new_obj->_parent; \
CoglHandleObject *obj = (CoglHandleObject *)&new_obj->_parent;\
obj->ref_count = 1; \
\
obj->klass = &_cogl_##type_name##_class; \

191
cogl/cogl-texture-2d-sliced-private.h Normal file
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@ -0,0 +1,191 @@
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009 Intel Corporation.
*
* 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 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 library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __COGL_TEXTURE_2D_SLICED_H
#define __COGL_TEXTURE_2D_SLICED_H
#include "cogl-bitmap-private.h"
#include "cogl-handle.h"
#include "cogl-material-private.h"
#include "cogl-texture-private.h"
#define COGL_TEXTURE_2D_SLICED(tex) ((CoglTexture2DSliced *)tex)
typedef struct _CoglTexture2DSliced CoglTexture2DSliced;
typedef struct _CoglTexSliceSpan CoglTexSliceSpan;
typedef struct _CoglSpanIter CoglSpanIter;
typedef struct _CoglTexturePixel CoglTexturePixel;
struct _CoglTexSliceSpan
{
int start;
int size;
int waste;
};
struct _CoglSpanIter
{
gint index;
GArray *array;
CoglTexSliceSpan *span;
float pos;
float next_pos;
float origin;
float cover_start;
float cover_end;
float intersect_start;
float intersect_end;
float intersect_start_local;
float intersect_end_local;
gboolean intersects;
gboolean flipped;
};
/* This is used to store the first pixel of each slice. This is only
used when glGenerateMipmap is not available */
struct _CoglTexturePixel
{
/* We need to store the format of the pixel because we store the
data in the source format which might end up being different for
each slice if a subregion is updated with a different format */
GLenum gl_format;
GLenum gl_type;
guint8 data[4];
};
struct _CoglTexture2DSliced
{
CoglTexture _parent;
GArray *slice_x_spans;
GArray *slice_y_spans;
GArray *slice_gl_handles;
gint max_waste;
/* This holds a copy of the first pixel in each slice. It is only
used to force an automatic update of the mipmaps when
glGenerateMipmap is not available. */
CoglTexturePixel *first_pixels;
};
GQuark
_cogl_handle_texture_2d_sliced_get_type (void);
CoglHandle
_cogl_texture_2d_sliced_new_with_size (unsigned int width,
unsigned int height,
CoglTextureFlags flags,
CoglPixelFormat internal_format);
CoglHandle
_cogl_texture_2d_sliced_new_from_file (const gchar *filename,
CoglTextureFlags flags,
CoglPixelFormat internal_format,
GError **error);
CoglHandle
_cogl_texture_2d_sliced_new_from_foreign (GLuint gl_handle,
GLenum gl_target,
GLuint width,
GLuint height,
GLuint x_pot_waste,
GLuint y_pot_waste,
CoglPixelFormat format);
CoglHandle
_cogl_texture_2d_sliced_new_from_data (unsigned int width,
unsigned int height,
CoglTextureFlags flags,
CoglPixelFormat format,
CoglPixelFormat internal_format,
unsigned int rowstride,
const guint8 *data);
CoglHandle
_cogl_texture_2d_sliced_new_from_bitmap (CoglHandle bmp_handle,
CoglTextureFlags flags,
CoglPixelFormat internal_format);
gboolean
_cogl_texture_2d_sliced_set_region (CoglHandle handle,
int src_x,
int src_y,
int dst_x,
int dst_y,
unsigned int dst_width,
unsigned int dst_height,
int width,
int height,
CoglPixelFormat format,
unsigned int rowstride,
const guint8 *data);
int
_cogl_texture_2d_sliced_get_data (CoglHandle handle,
CoglPixelFormat format,
unsigned int rowstride,
guint8 *data);
void
_cogl_texture_2d_sliced_foreach_sub_texture_in_region (
CoglTexture2DSliced *tex_2ds,
float virtual_tx_1,
float virtual_ty_1,
float virtual_tx_2,
float virtual_ty_2,
CoglTextureSliceCallback callback,
void *user_data);
gint
_cogl_texture_2d_sliced_get_max_waste (CoglHandle handle);
gboolean
_cogl_texture_2d_sliced_is_sliced (CoglHandle handle);
gboolean
_cogl_texture_2d_sliced_can_hardware_repeat (CoglHandle handle);
void
_cogl_texture_2d_sliced_transform_coords_to_gl (CoglTexture2DSliced *tex_2ds,
float *s,
float *t);
gboolean
_cogl_texture_2d_sliced_get_gl_texture (CoglHandle handle,
GLuint *out_gl_handle,
GLenum *out_gl_target);
void
_cogl_texture_2d_sliced_set_filters (CoglHandle handle,
GLenum min_filter,
GLenum mag_filter);
void
_cogl_texture_2d_sliced_ensure_mipmaps (CoglHandle handle);
void
_cogl_texture_2d_sliced_set_wrap_mode_parameter (CoglTexture2DSliced *tex_2ds,
GLenum wrap_mode);
#endif /* __COGL_TEXTURE_2D_SLICED_H */

1871
cogl/cogl-texture-2d-sliced.c Normal file
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File diff suppressed because it is too large Load Diff

12
cogl/cogl-texture-driver.h
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@ -91,6 +91,18 @@ _cogl_texture_driver_download_from_gl (CoglTexture *tex,
GLuint target_gl_format,
GLuint target_gl_type);
/*
* This driver abstraction is needed because GLES doesn't support glGetTexImage
* (). On GLES this currently just returns FALSE which will lead to a generic
* fallback path being used that simply renders the texture and reads it back
* from the framebuffer. (See _cogl_texture_draw_and_read () )
*/
gboolean
_cogl_texture_driver_gl_get_tex_image (GLenum gl_target,
GLenum dest_gl_format,
GLenum dest_gl_type,
guint8 *dest);
/*
* It may depend on the driver as to what texture sizes are supported...
*/

80
cogl/cogl-texture-private.h
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@ -28,72 +28,31 @@
#include "cogl-handle.h"
#include "cogl-material-private.h"
#define COGL_TEXTURE(tex) ((CoglTexture *)(tex))
typedef struct _CoglTexture CoglTexture;
typedef struct _CoglTexSliceSpan CoglTexSliceSpan;
typedef struct _CoglSpanIter CoglSpanIter;
typedef struct _CoglTexturePixel CoglTexturePixel;
struct _CoglTexSliceSpan
typedef enum _CoglTextureType
{
gint start;
gint size;
gint waste;
};
struct _CoglSpanIter
{
gint index;
GArray *array;
CoglTexSliceSpan *span;
float pos;
float next_pos;
float origin;
float cover_start;
float cover_end;
float intersect_start;
float intersect_end;
float intersect_start_local;
float intersect_end_local;
gboolean intersects;
gboolean flipped;
};
/* This is used to store the first pixel of each slice. This is only
used when glGenerateMipmap is not available */
struct _CoglTexturePixel
{
/* We need to store the format of the pixel because we store the
data in the source format which might end up being different for
each slice if a subregion is updated with a different format */
GLenum gl_format;
GLenum gl_type;
guint8 data[4];
};
COGL_TEXTURE_TYPE_2D_SLICED
} CoglTextureType;
struct _CoglTexture
{
CoglHandleObject _parent;
CoglTextureType type;
CoglBitmap bitmap;
gboolean bitmap_owner;
GLenum gl_target;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
GArray *slice_x_spans;
GArray *slice_y_spans;
GArray *slice_gl_handles;
gint max_waste;
GLenum min_filter;
GLenum mag_filter;
gboolean is_foreign;
GLint wrap_mode;
gboolean auto_mipmap;
gboolean mipmaps_dirty;
/* This holds a copy of the first pixel in each slice. It is only
used to force an automatic update of the mipmaps when
glGenerateMipmap is not available. */
CoglTexturePixel *first_pixels;
};
/* To improve batching of geometry when submitting vertices to OpenGL we
@ -117,9 +76,6 @@ typedef void (*CoglTextureSliceCallback) (CoglHandle handle,
float *virtual_coords,
void *user_data);
CoglTexture*
_cogl_texture_pointer_from_handle (CoglHandle handle);
void
_cogl_texture_foreach_sub_texture_in_region (CoglHandle handle,
float virtual_tx_1,
@ -151,10 +107,34 @@ _cogl_texture_set_filters (CoglHandle handle,
void
_cogl_texture_ensure_mipmaps (CoglHandle handle);
/* Functions currently only used by CoglTexture implementations or
* drivers... */
void
_cogl_texture_free (CoglTexture *tex);
void
_cogl_texture_bitmap_free (CoglTexture *tex);
void
_cogl_texture_bitmap_swap (CoglTexture *tex,
CoglBitmap *new_bitmap);
gboolean
_cogl_texture_bitmap_prepare (CoglTexture *tex,
CoglPixelFormat internal_format);
void
_cogl_texture_prep_gl_alignment_for_pixels_upload (int pixels_rowstride);
void
_cogl_texture_prep_gl_alignment_for_pixels_download (int pixels_rowstride);
gboolean
_cogl_texture_draw_and_read (CoglTexture *tex,
CoglBitmap *target_bmp,
GLuint target_gl_format,
GLuint target_gl_type);
#endif /* __COGL_TEXTURE_PRIVATE_H */

1954
cogl/cogl-texture.c
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File diff suppressed because it is too large Load Diff

97
cogl/driver/gl/cogl-texture-driver.c
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@ -135,95 +135,16 @@ _cogl_texture_driver_upload_subregion_to_gl (CoglTexture *tex,
}
gboolean
_cogl_texture_driver_download_from_gl (CoglTexture *tex,
CoglBitmap *target_bmp,
GLuint target_gl_format,
GLuint target_gl_type)
_cogl_texture_driver_gl_get_tex_image (GLenum gl_target,
GLenum dest_gl_format,
GLenum dest_gl_type,
guint8 *dest)
{
CoglTexSliceSpan *x_span;
CoglTexSliceSpan *y_span;
GLuint gl_handle;
gint bpp;
gint x,y;
CoglBitmap slice_bmp;
bpp = _cogl_get_format_bpp (target_bmp->format);
/* Iterate vertical slices */
for (y = 0; y < tex->slice_y_spans->len; ++y)
{
y_span = &g_array_index (tex->slice_y_spans, CoglTexSliceSpan, y);
/* Iterate horizontal slices */
for (x = 0; x < tex->slice_x_spans->len; ++x)
{
/*if (x != 0 || y != 1) continue;*/
x_span = &g_array_index (tex->slice_x_spans, CoglTexSliceSpan, x);
/* Pick the gl texture object handle */
gl_handle = g_array_index (tex->slice_gl_handles, GLuint,
y * tex->slice_x_spans->len + x);
/* If there's any waste we need to copy manually
(no glGetTexSubImage) */
if (y_span->waste != 0 || x_span->waste != 0)
{
/* Setup temp bitmap for slice subregion */
slice_bmp.format = target_bmp->format;
slice_bmp.width = x_span->size;
slice_bmp.height = y_span->size;
slice_bmp.rowstride = bpp * slice_bmp.width;
slice_bmp.data = (guchar*) g_malloc (slice_bmp.rowstride *
slice_bmp.height);
/* Setup gl alignment to 0,0 top-left corner */
_cogl_texture_driver_prep_gl_for_pixels_download (
slice_bmp.rowstride,
bpp);
/* Download slice image data into temp bmp */
GE( glBindTexture (tex->gl_target, gl_handle) );
GE (glGetTexImage (tex->gl_target,
0, /* level */
target_gl_format,
target_gl_type,
slice_bmp.data) );
/* Copy portion of slice from temp to target bmp */
_cogl_bitmap_copy_subregion (&slice_bmp,
target_bmp,
0, 0,
x_span->start,
y_span->start,
x_span->size - x_span->waste,
y_span->size - y_span->waste);
/* Free temp bitmap */
g_free (slice_bmp.data);
}
else
{
GLvoid *dst = target_bmp->data
+ x_span->start * bpp
+ y_span->start * target_bmp->rowstride;
_cogl_texture_driver_prep_gl_for_pixels_download (
target_bmp->rowstride,
bpp);
/* Download slice image data */
GE( glBindTexture (tex->gl_target, gl_handle) );
GE( glGetTexImage (tex->gl_target,
0, /* level */
target_gl_format,
target_gl_type,
dst) );
}
}
}
GE (glGetTexImage (gl_target,
0, /* level */
dest_gl_format,
dest_gl_type,
(GLvoid *)dest));
return TRUE;
}

2
cogl/driver/gles/cogl-context-driver.c
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@ -31,8 +31,6 @@
void
_cogl_create_context_driver (CoglContext *context)
{
context->drv.texture_download_material = COGL_INVALID_HANDLE;
/* Init the GLES2 wrapper */
#ifdef HAVE_COGL_GLES2
cogl_gles2_wrapper_init (&context->drv.gles2);

2
cogl/driver/gles/cogl-context-driver.h
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@ -29,8 +29,6 @@
typedef struct _CoglContextDriver
{
CoglHandle texture_download_material;
#ifdef HAVE_COGL_GLES2
CoglGles2Wrapper gles2;

217
cogl/driver/gles/cogl-texture-driver.c
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@ -128,217 +128,16 @@ _cogl_texture_driver_upload_subregion_to_gl (CoglTexture *tex,
g_free (slice_bmp.data);
}
static void
_cogl_texture_draw_and_read (CoglTexture *tex,
CoglBitmap *target_bmp,
GLint *viewport)
{
gint bpp;
float rx1, ry1;
float rx2, ry2;
float tx1, ty1;
float tx2, ty2;
int bw, bh;
CoglBitmap rect_bmp;
CoglHandle handle;
handle = (CoglHandle) tex;
bpp = _cogl_get_format_bpp (COGL_PIXEL_FORMAT_RGBA_8888);
ry1 = 0; ry2 = 0;
ty1 = 0; ty2 = 0;
/* Walk Y axis until whole bitmap height consumed */
for (bh = tex->bitmap.height; bh > 0; bh -= viewport[3])
{
/* Rectangle Y coords */
ry1 = ry2;
ry2 += (bh < viewport[3]) ? bh : viewport[3];
/* Normalized texture Y coords */
ty1 = ty2;
ty2 = (ry2 / (float)tex->bitmap.height);
rx1 = 0; rx2 = 0;
tx1 = 0; tx2 = 0;
/* Walk X axis until whole bitmap width consumed */
for (bw = tex->bitmap.width; bw > 0; bw-=viewport[2])
{
/* Rectangle X coords */
rx1 = rx2;
rx2 += (bw < viewport[2]) ? bw : viewport[2];
/* Normalized texture X coords */
tx1 = tx2;
tx2 = (rx2 / (float)tex->bitmap.width);
/* Draw a portion of texture */
cogl_rectangle_with_texture_coords (0, 0,
rx2 - rx1,
ry2 - ry1,
tx1, ty1,
tx2, ty2);
/* Read into a temporary bitmap */
rect_bmp.format = COGL_PIXEL_FORMAT_RGBA_8888;
rect_bmp.width = rx2 - rx1;
rect_bmp.height = ry2 - ry1;
rect_bmp.rowstride = bpp * rect_bmp.width;
rect_bmp.data = (guchar*) g_malloc (rect_bmp.rowstride *
rect_bmp.height);
_cogl_texture_driver_prep_gl_for_pixels_download (rect_bmp.rowstride,
bpp);
GE( glReadPixels (viewport[0], viewport[1],
rect_bmp.width,
rect_bmp.height,
GL_RGBA, GL_UNSIGNED_BYTE,
rect_bmp.data) );
/* Copy to target bitmap */
_cogl_bitmap_copy_subregion (&rect_bmp,
target_bmp,
0,0,
rx1,ry1,
rect_bmp.width,
rect_bmp.height);
/* Free temp bitmap */
g_free (rect_bmp.data);
}
}
}
/* NB: GLES doesn't support glGetTexImage2D, so cogl-texture will instead
* fallback to a generic render + readpixels approach to downloading
* texture data. (See _cogl_texture_draw_and_read() ) */
gboolean
_cogl_texture_driver_download_from_gl (CoglTexture *tex,
CoglBitmap *target_bmp,
GLuint target_gl_format,
GLuint target_gl_type)
_cogl_texture_driver_gl_get_tex_image (GLenum gl_target,
GLenum dest_gl_format,
GLenum dest_gl_type,
guint8 *dest)
{
gint bpp;
GLint viewport[4];
CoglBitmap alpha_bmp;
CoglHandle prev_source;
_COGL_GET_CONTEXT (ctx, FALSE);
bpp = _cogl_get_format_bpp (COGL_PIXEL_FORMAT_RGBA_8888);
/* Viewport needs to have some size and be inside the window for this */
GE( glGetIntegerv (GL_VIEWPORT, viewport) );
if (viewport[0] < 0 || viewport[1] < 0 ||
viewport[2] <= 0 || viewport[3] <= 0)
return FALSE;
/* Setup orthographic projection into current viewport
(0,0 in bottom-left corner to draw the texture
upside-down so we match the way glReadPixels works) */
_cogl_set_current_matrix (COGL_MATRIX_PROJECTION);
_cogl_current_matrix_push ();
_cogl_current_matrix_identity ();
_cogl_current_matrix_ortho (0, (float)(viewport[2]),
0, (float)(viewport[3]),
(float)(0),
(float)(100));
_cogl_set_current_matrix (COGL_MATRIX_MODELVIEW);
_cogl_current_matrix_push ();
_cogl_current_matrix_identity ();
/* Direct copy operation */
if (ctx->drv.texture_download_material == COGL_INVALID_HANDLE)
{
ctx->drv.texture_download_material = cogl_material_new ();
cogl_material_set_blend (ctx->drv.texture_download_material,
"RGBA = ADD (SRC_COLOR, 0)",
NULL);
}
prev_source = cogl_handle_ref (ctx->source_material);
cogl_set_source (ctx->drv.texture_download_material);
cogl_material_set_layer (ctx->drv.texture_download_material, 0, tex);
cogl_material_set_layer_combine (ctx->drv.texture_download_material,
0, /* layer */
"RGBA = REPLACE (TEXTURE)",
NULL);
_cogl_texture_draw_and_read (tex, target_bmp, viewport);
/* Check whether texture has alpha and framebuffer not */
/* FIXME: For some reason even if ALPHA_BITS is 8, the framebuffer
still doesn't seem to have an alpha buffer. This might be just
a PowerVR issue.
GLint r_bits, g_bits, b_bits, a_bits;
GE( glGetIntegerv (GL_ALPHA_BITS, &a_bits) );
GE( glGetIntegerv (GL_RED_BITS, &r_bits) );
GE( glGetIntegerv (GL_GREEN_BITS, &g_bits) );
GE( glGetIntegerv (GL_BLUE_BITS, &b_bits) );
printf ("R bits: %d\n", r_bits);
printf ("G bits: %d\n", g_bits);
printf ("B bits: %d\n", b_bits);
printf ("A bits: %d\n", a_bits); */
if ((tex->bitmap.format & COGL_A_BIT)/* && a_bits == 0*/)
{
guchar *srcdata;
guchar *dstdata;
guchar *srcpixel;
guchar *dstpixel;
gint x,y;
/* Create temp bitmap for alpha values */
alpha_bmp.format = COGL_PIXEL_FORMAT_RGBA_8888;
alpha_bmp.width = target_bmp->width;
alpha_bmp.height = target_bmp->height;
alpha_bmp.rowstride = bpp * alpha_bmp.width;
alpha_bmp.data = (guchar*) g_malloc (alpha_bmp.rowstride *
alpha_bmp.height);
/* Draw alpha values into RGB channels */
cogl_material_set_layer_combine (ctx->drv.texture_download_material,
0, /* layer */
"RGBA = REPLACE (TEXTURE[A])",
NULL);
_cogl_texture_draw_and_read (tex, &alpha_bmp, viewport);
/* Copy temp R to target A */
srcdata = alpha_bmp.data;
dstdata = target_bmp->data;
for (y=0; y<target_bmp->height; ++y)
{
for (x=0; x<target_bmp->width; ++x)
{
srcpixel = srcdata + x*bpp;
dstpixel = dstdata + x*bpp;
dstpixel[3] = srcpixel[0];
}
srcdata += alpha_bmp.rowstride;
dstdata += target_bmp->rowstride;
}
g_free (alpha_bmp.data);
}
/* Restore old state */
_cogl_set_current_matrix (COGL_MATRIX_PROJECTION);
_cogl_current_matrix_pop ();
_cogl_set_current_matrix (COGL_MATRIX_MODELVIEW);
_cogl_current_matrix_pop ();
/* restore the original material */
cogl_set_source (prev_source);
cogl_handle_unref (prev_source);
return TRUE;
return FALSE;
}
gboolean