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2008-06-14 Matthew Allum <mallum@openedhand.com>

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* README:
        Make needed GL version 1.4, note GLES2 support, add some notes
        for COGL.
This commit is contained in:
Matthew Allum 2008-06-13 23:03:45 +00:00
parent 042cee7a5b
commit 6fe15aefb0
3 changed files with 72 additions and 4 deletions
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2
gl/cogl-defines.h.in
View File

@ -26,6 +26,8 @@
#ifndef __COGL_DEFINES_H__
#define __COGL_DEFINES_H__
#define GL_GLEXT_PROTOTYPES 1
#include <@CLUTTER_GL_HEADER@>
G_BEGIN_DECLS

71
gl/cogl-texture.c
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@ -38,6 +38,9 @@
#include <string.h>
#include <stdlib.h>
// #define HAVE_PBOS 1
#include <GL/glext.h>
/*
#define COGL_DEBUG 1
@ -244,7 +247,39 @@ _cogl_texture_upload_to_gl (CoglTexture *tex)
x_span->start,
y_span->start,
FALSE);
{
#if HAVE_PBOS
void *io_mem;
GLuint buf;
buf = g_array_index (tex->slice_buf_handles, GLuint,
y * tex->slice_x_spans->len + x);
glBindBuffer (GL_PIXEL_UNPACK_BUFFER_ARB, buf);
glBufferData (GL_PIXEL_UNPACK_BUFFER_ARB,
tex->bitmap.height * tex->bitmap.rowstride,
NULL,
GL_STREAM_DRAW);
io_mem = glMapBuffer (GL_PIXEL_UNPACK_BUFFER_ARB, GL_WRITE_ONLY);
g_assert (io_mem);
memcpy (io_mem, tex->bitmap.data,
tex->bitmap.height * tex->bitmap.rowstride);
GE( glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER_ARB) );
GE( glBindTexture (tex->gl_target, gl_handle) );
GE( glTexSubImage2D (tex->gl_target, 0, 0, 0,
x_span->size - x_span->waste,
y_span->size - y_span->waste,
tex->gl_format, tex->gl_type,
(char *)NULL) );
GE( glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0) );
#else
/* Upload new image data */
GE( glBindTexture (tex->gl_target, gl_handle) );
@ -253,6 +288,8 @@ _cogl_texture_upload_to_gl (CoglTexture *tex)
y_span->size - y_span->waste,
tex->gl_format, tex->gl_type,
tex->bitmap.data) );
#endif
}
}
}
@ -568,6 +605,9 @@ _cogl_texture_slices_create (CoglTexture *tex)
gint max_width;
gint max_height;
GLuint *gl_handles;
#if HAVE_PBOS
GLuint *buf_handles;
#endif
gint n_x_slices;
gint n_y_slices;
gint n_slices;
@ -704,6 +744,16 @@ _cogl_texture_slices_create (CoglTexture *tex)
GE( glGenTextures (n_slices, gl_handles) );
#if HAVE_PBOS
tex->slice_buf_handles = g_array_sized_new (FALSE, FALSE,
sizeof (GLuint),
n_slices);
g_array_set_size (tex->slice_buf_handles, n_slices);
buf_handles = (GLuint*) tex->slice_buf_handles->data;
GE( glGenBuffers(n_slices, buf_handles) );
#endif
/* Init each GL texture object */
for (y = 0; y < n_y_slices; ++y)
@ -712,6 +762,9 @@ _cogl_texture_slices_create (CoglTexture *tex)
for (x = 0; x < n_x_slices; ++x)
{
#if HAVE_PBOS
glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
#endif
x_span = &g_array_index (tex->slice_x_spans, CoglTexSliceSpan, x);
#if COGL_DEBUG
@ -721,9 +774,12 @@ _cogl_texture_slices_create (CoglTexture *tex)
y_span->size - y_span->waste);
#endif
/* Setup texture parameters */
GE( glBindTexture (tex->gl_target, gl_handles[y * n_x_slices + x]) );
GE( glTexParameteri (tex->gl_target, GL_TEXTURE_MAG_FILTER, tex->mag_filter) );
GE( glTexParameteri (tex->gl_target, GL_TEXTURE_MIN_FILTER, tex->min_filter) );
GE( glBindTexture (tex->gl_target,
gl_handles[y * n_x_slices + x]) );
GE( glTexParameteri (tex->gl_target,
GL_TEXTURE_MAG_FILTER, tex->mag_filter) );
GE( glTexParameteri (tex->gl_target,
GL_TEXTURE_MIN_FILTER, tex->min_filter) );
GE( glTexParameteri (tex->gl_target, GL_TEXTURE_WRAP_S,
tex->wrap_mode) );
@ -768,6 +824,15 @@ _cogl_texture_slices_free (CoglTexture *tex)
g_array_free (tex->slice_gl_handles, TRUE);
}
#if HAVE_PBOS
if (tex->slice_buf_handles != NULL)
{
glDeleteBuffers(tex->slice_buf_handles->len,
(GLuint*) tex->slice_buf_handles->data);
}
#endif
}
static gboolean

1
gl/cogl-texture.h
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@ -51,6 +51,7 @@ struct _CoglTexture
GArray *slice_x_spans;
GArray *slice_y_spans;
GArray *slice_gl_handles;
GArray *slice_buf_handles;
gint max_waste;
COGLenum min_filter;
COGLenum mag_filter;