mirror of
https://github.com/brl/mutter.git
synced 2024-11-21 23:50:41 -05:00
framebuffer: move fb stack under cogl/deprecated/
This moves the framebuffer stack apis out of cogl-framebuffer.c into cogl/deprecated/cogl-framebuffer-deprecated.c so cogl-framebuffer.c is more in-line with the master branch to ease cherry picking patches. Reviewed-by: Neil Roberts <neil@linux.intel.com>
This commit is contained in:
Robert Bragg
parent
1472c5beb2
commit
1932892b98
@ -50,6 +50,8 @@
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#include "cogl-config-private.h"
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#include "cogl-error-private.h"
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#include "cogl/deprecated/cogl-framebuffer-deprecated.h"
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#include <string.h>
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#include <stdlib.h>
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@ -50,12 +50,6 @@
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#include "cogl-error-private.h"
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#include "cogl-texture-gl-private.h"
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typedef struct _CoglFramebufferStackEntry
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{
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CoglFramebuffer *draw_buffer;
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CoglFramebuffer *read_buffer;
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} CoglFramebufferStackEntry;
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extern CoglObjectClass _cogl_onscreen_class;
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#ifdef COGL_ENABLE_DEBUG
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@ -801,252 +795,6 @@ cogl_framebuffer_allocate (CoglFramebuffer *framebuffer,
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return TRUE;
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}
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static CoglFramebufferStackEntry *
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create_stack_entry (CoglFramebuffer *draw_buffer,
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CoglFramebuffer *read_buffer)
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{
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CoglFramebufferStackEntry *entry = g_slice_new (CoglFramebufferStackEntry);
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entry->draw_buffer = draw_buffer;
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entry->read_buffer = read_buffer;
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return entry;
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}
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GSList *
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_cogl_create_framebuffer_stack (void)
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{
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CoglFramebufferStackEntry *entry;
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GSList *stack = NULL;
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entry = create_stack_entry (NULL, NULL);
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return g_slist_prepend (stack, entry);
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}
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void
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_cogl_free_framebuffer_stack (GSList *stack)
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{
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GSList *l;
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for (l = stack; l != NULL; l = l->next)
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{
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CoglFramebufferStackEntry *entry = l->data;
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if (entry->draw_buffer)
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cogl_object_unref (entry->draw_buffer);
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if (entry->read_buffer)
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cogl_object_unref (entry->draw_buffer);
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g_slice_free (CoglFramebufferStackEntry, entry);
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}
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g_slist_free (stack);
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}
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static void
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notify_buffers_changed (CoglFramebuffer *old_draw_buffer,
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CoglFramebuffer *new_draw_buffer,
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CoglFramebuffer *old_read_buffer,
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CoglFramebuffer *new_read_buffer)
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{
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/* XXX: To support the deprecated cogl_set_draw_buffer API we keep
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* track of the last onscreen framebuffer that was set so that it
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* can be restored if the COGL_WINDOW_BUFFER enum is used. A
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* reference isn't taken to the framebuffer because otherwise we
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* would have a circular reference between the context and the
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* framebuffer. Instead the pointer is set to NULL in
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* _cogl_onscreen_free as a kind of a cheap weak reference */
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if (new_draw_buffer &&
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new_draw_buffer->type == COGL_FRAMEBUFFER_TYPE_ONSCREEN)
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new_draw_buffer->context->window_buffer = new_draw_buffer;
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}
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/* Set the current framebuffer without checking if it's already the
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* current framebuffer. This is used by cogl_pop_framebuffer while
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* the top of the stack is currently not up to date. */
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static void
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_cogl_set_framebuffers_real (CoglFramebuffer *draw_buffer,
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CoglFramebuffer *read_buffer)
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{
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CoglFramebufferStackEntry *entry;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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_COGL_RETURN_IF_FAIL (ctx != NULL);
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_COGL_RETURN_IF_FAIL (draw_buffer && read_buffer ?
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draw_buffer->context == read_buffer->context : TRUE);
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entry = ctx->framebuffer_stack->data;
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notify_buffers_changed (entry->draw_buffer,
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draw_buffer,
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entry->read_buffer,
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read_buffer);
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if (draw_buffer)
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cogl_object_ref (draw_buffer);
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if (entry->draw_buffer)
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cogl_object_unref (entry->draw_buffer);
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if (read_buffer)
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cogl_object_ref (read_buffer);
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if (entry->read_buffer)
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cogl_object_unref (entry->read_buffer);
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entry->draw_buffer = draw_buffer;
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entry->read_buffer = read_buffer;
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}
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static void
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_cogl_set_framebuffers (CoglFramebuffer *draw_buffer,
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CoglFramebuffer *read_buffer)
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{
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CoglFramebuffer *current_draw_buffer;
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CoglFramebuffer *current_read_buffer;
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_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (draw_buffer));
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_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (read_buffer));
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current_draw_buffer = cogl_get_draw_framebuffer ();
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current_read_buffer = _cogl_get_read_framebuffer ();
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if (current_draw_buffer != draw_buffer ||
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current_read_buffer != read_buffer)
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_cogl_set_framebuffers_real (draw_buffer, read_buffer);
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}
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void
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cogl_set_framebuffer (CoglFramebuffer *framebuffer)
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{
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_cogl_set_framebuffers (framebuffer, framebuffer);
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}
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/* XXX: deprecated API */
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void
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cogl_set_draw_buffer (CoglBufferTarget target, CoglHandle handle)
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{
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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if (target == COGL_WINDOW_BUFFER)
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handle = ctx->window_buffer;
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/* This is deprecated public API. The public API doesn't currently
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really expose the concept of separate draw and read buffers so
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for the time being this actually just sets both buffers */
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cogl_set_framebuffer (handle);
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}
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CoglFramebuffer *
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cogl_get_draw_framebuffer (void)
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{
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CoglFramebufferStackEntry *entry;
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_COGL_GET_CONTEXT (ctx, NULL);
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g_assert (ctx->framebuffer_stack);
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entry = ctx->framebuffer_stack->data;
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return entry->draw_buffer;
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}
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CoglFramebuffer *
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_cogl_get_read_framebuffer (void)
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{
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CoglFramebufferStackEntry *entry;
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_COGL_GET_CONTEXT (ctx, NULL);
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g_assert (ctx->framebuffer_stack);
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entry = ctx->framebuffer_stack->data;
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return entry->read_buffer;
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}
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void
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_cogl_push_framebuffers (CoglFramebuffer *draw_buffer,
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CoglFramebuffer *read_buffer)
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{
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CoglContext *ctx;
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CoglFramebuffer *old_draw_buffer, *old_read_buffer;
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_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (draw_buffer));
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_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (read_buffer));
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ctx = draw_buffer->context;
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_COGL_RETURN_IF_FAIL (ctx != NULL);
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_COGL_RETURN_IF_FAIL (draw_buffer->context == read_buffer->context);
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_COGL_RETURN_IF_FAIL (ctx->framebuffer_stack != NULL);
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/* Copy the top of the stack so that when we call cogl_set_framebuffer
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it will still know what the old framebuffer was */
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old_draw_buffer = cogl_get_draw_framebuffer ();
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if (old_draw_buffer)
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cogl_object_ref (old_draw_buffer);
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old_read_buffer = _cogl_get_read_framebuffer ();
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if (old_read_buffer)
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cogl_object_ref (old_read_buffer);
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ctx->framebuffer_stack =
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g_slist_prepend (ctx->framebuffer_stack,
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create_stack_entry (old_draw_buffer,
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old_read_buffer));
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_cogl_set_framebuffers (draw_buffer, read_buffer);
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}
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void
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cogl_push_framebuffer (CoglFramebuffer *buffer)
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{
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_cogl_push_framebuffers (buffer, buffer);
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}
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/* XXX: deprecated API */
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void
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cogl_push_draw_buffer (void)
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{
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cogl_push_framebuffer (cogl_get_draw_framebuffer ());
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}
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void
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cogl_pop_framebuffer (void)
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{
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CoglFramebufferStackEntry *to_pop;
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CoglFramebufferStackEntry *to_restore;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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g_assert (ctx->framebuffer_stack != NULL);
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g_assert (ctx->framebuffer_stack->next != NULL);
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to_pop = ctx->framebuffer_stack->data;
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to_restore = ctx->framebuffer_stack->next->data;
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if (to_pop->draw_buffer != to_restore->draw_buffer ||
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to_pop->read_buffer != to_restore->read_buffer)
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notify_buffers_changed (to_pop->draw_buffer,
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to_restore->draw_buffer,
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to_pop->read_buffer,
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to_restore->read_buffer);
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cogl_object_unref (to_pop->draw_buffer);
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cogl_object_unref (to_pop->read_buffer);
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g_slice_free (CoglFramebufferStackEntry, to_pop);
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ctx->framebuffer_stack =
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g_slist_delete_link (ctx->framebuffer_stack,
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ctx->framebuffer_stack);
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}
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/* XXX: deprecated API */
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void
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cogl_pop_draw_buffer (void)
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{
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cogl_pop_framebuffer ();
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}
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static unsigned long
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_cogl_framebuffer_compare_viewport_state (CoglFramebuffer *a,
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CoglFramebuffer *b)
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@ -731,204 +731,6 @@ COGL_DEPRECATED_IN_1_16
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void
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cogl_set_source_texture (CoglTexture *texture);
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/**
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* cogl_set_framebuffer:
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* @buffer: A #CoglFramebuffer object, either onscreen or offscreen.
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*
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* This redirects all subsequent drawing to the specified framebuffer. This can
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* either be an offscreen buffer created with cogl_offscreen_new_to_texture ()
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* or in the future it may be an onscreen framebuffers too.
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*
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* Since: 1.2
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED_IN_1_16
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void
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cogl_set_framebuffer (CoglFramebuffer *buffer);
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/**
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* cogl_push_framebuffer:
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* @buffer: A #CoglFramebuffer object, either onscreen or offscreen.
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*
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* Redirects all subsequent drawing to the specified framebuffer. This can
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* either be an offscreen buffer created with cogl_offscreen_new_to_texture ()
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* or in the future it may be an onscreen framebuffer too.
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*
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* You should understand that a framebuffer owns the following state:
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* <itemizedlist>
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* <listitem><simpara>The projection matrix</simpara></listitem>
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* <listitem><simpara>The modelview matrix stack</simpara></listitem>
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* <listitem><simpara>The viewport</simpara></listitem>
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* <listitem><simpara>The clip stack</simpara></listitem>
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* </itemizedlist>
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* So these items will automatically be saved and restored when you
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* push and pop between different framebuffers.
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*
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* Also remember a newly allocated framebuffer will have an identity matrix for
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* the projection and modelview matrices which gives you a coordinate space
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* like OpenGL with (-1, -1) corresponding to the top left of the viewport,
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* (1, 1) corresponding to the bottom right and +z coming out towards the
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* viewer.
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*
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* If you want to set up a coordinate space like Clutter does with (0, 0)
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* corresponding to the top left and (framebuffer_width, framebuffer_height)
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* corresponding to the bottom right you can do so like this:
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*
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* |[
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* static void
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* setup_viewport (unsigned int width,
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* unsigned int height,
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* float fovy,
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* float aspect,
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* float z_near,
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* float z_far)
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* {
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* float z_camera;
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* CoglMatrix projection_matrix;
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* CoglMatrix mv_matrix;
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*
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* cogl_set_viewport (0, 0, width, height);
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* cogl_perspective (fovy, aspect, z_near, z_far);
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*
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* cogl_get_projection_matrix (&projection_matrix);
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* z_camera = 0.5 * projection_matrix.xx;
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*
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* cogl_matrix_init_identity (&mv_matrix);
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* cogl_matrix_translate (&mv_matrix, -0.5f, -0.5f, -z_camera);
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* cogl_matrix_scale (&mv_matrix, 1.0f / width, -1.0f / height, 1.0f / width);
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* cogl_matrix_translate (&mv_matrix, 0.0f, -1.0 * height, 0.0f);
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* cogl_set_modelview_matrix (&mv_matrix);
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* }
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*
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* static void
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* my_init_framebuffer (ClutterStage *stage,
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* CoglFramebuffer *framebuffer,
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* unsigned int framebuffer_width,
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* unsigned int framebuffer_height)
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* {
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* ClutterPerspective perspective;
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*
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* clutter_stage_get_perspective (stage, &perspective);
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*
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* cogl_push_framebuffer (framebuffer);
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* setup_viewport (framebuffer_width,
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* framebuffer_height,
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* perspective.fovy,
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* perspective.aspect,
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* perspective.z_near,
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* perspective.z_far);
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* }
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* ]|
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*
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* The previous framebuffer can be restored by calling cogl_pop_framebuffer()
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*
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* Since: 1.2
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED_IN_1_16
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void
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cogl_push_framebuffer (CoglFramebuffer *buffer);
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/**
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* cogl_pop_framebuffer:
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*
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* Restores the framebuffer that was previously at the top of the stack.
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* All subsequent drawing will be redirected to this framebuffer.
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*
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* Since: 1.2
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED_IN_1_16
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void
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cogl_pop_framebuffer (void);
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/**
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* cogl_set_draw_buffer:
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* @target: A #CoglBufferTarget that specifies what kind of framebuffer you
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* are setting as the render target.
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* @offscreen: If you are setting a framebuffer of type COGL_OFFSCREEN_BUFFER
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* then this is a CoglHandle for the offscreen buffer.
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*
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* Redirects all subsequent drawing to the specified framebuffer. This
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* can either be an offscreen buffer created with
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* cogl_offscreen_new_to_texture () or you can revert to your original
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* on screen window buffer.
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*
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED_IN_1_16
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void
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cogl_set_draw_buffer (CoglBufferTarget target,
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CoglHandle offscreen);
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/**
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* cogl_push_draw_buffer:
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*
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* Save cogl_set_draw_buffer() state.
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*
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED_IN_1_16
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void
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cogl_push_draw_buffer (void);
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/**
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* cogl_pop_draw_buffer:
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*
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* Restore cogl_set_draw_buffer() state.
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*
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED_IN_1_16
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void
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cogl_pop_draw_buffer (void);
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/**
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* cogl_read_pixels:
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* @x: The window x position to start reading from
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* @y: The window y position to start reading from
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* @width: The width of the rectangle you want to read
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* @height: The height of the rectangle you want to read
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* @source: Identifies which auxillary buffer you want to read
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* (only COGL_READ_PIXELS_COLOR_BUFFER supported currently)
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* @format: The pixel format you want the result in
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* (only COGL_PIXEL_FORMAT_RGBA_8888 supported currently)
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* @pixels: The location to write the pixel data.
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*
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* This reads a rectangle of pixels from the current framebuffer where
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* position (0, 0) is the top left. The pixel at (x, y) is the first
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* read, and the data is returned with a rowstride of (width * 4).
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*
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* Currently Cogl assumes that the framebuffer is in a premultiplied
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* format so if @format is non-premultiplied it will convert it. To
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* read the pixel values without any conversion you should either
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* specify a format that doesn't use an alpha channel or use one of
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* the formats ending in PRE.
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*
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* Deprecated: 1.16: Use cogl_framebuffer_read_pixels() instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_framebuffer_read_pixels)
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void
|
||||
cogl_read_pixels (int x,
|
||||
int y,
|
||||
int width,
|
||||
int height,
|
||||
CoglReadPixelsFlags source,
|
||||
CoglPixelFormat format,
|
||||
uint8_t *pixels);
|
||||
|
||||
/**
|
||||
* cogl_flush:
|
||||
*
|
||||
|
||||
@ -25,12 +25,265 @@
|
||||
#include <config.h>
|
||||
|
||||
#include "cogl-types.h"
|
||||
#include "cogl-context-private.h"
|
||||
#include "cogl-framebuffer-private.h"
|
||||
#include "cogl-framebuffer-deprecated.h"
|
||||
|
||||
typedef struct _CoglFramebufferStackEntry
|
||||
{
|
||||
CoglFramebuffer *draw_buffer;
|
||||
CoglFramebuffer *read_buffer;
|
||||
} CoglFramebufferStackEntry;
|
||||
|
||||
|
||||
static CoglFramebufferStackEntry *
|
||||
create_stack_entry (CoglFramebuffer *draw_buffer,
|
||||
CoglFramebuffer *read_buffer)
|
||||
{
|
||||
CoglFramebufferStackEntry *entry = g_slice_new (CoglFramebufferStackEntry);
|
||||
|
||||
entry->draw_buffer = draw_buffer;
|
||||
entry->read_buffer = read_buffer;
|
||||
|
||||
return entry;
|
||||
}
|
||||
|
||||
GSList *
|
||||
_cogl_create_framebuffer_stack (void)
|
||||
{
|
||||
CoglFramebufferStackEntry *entry;
|
||||
GSList *stack = NULL;
|
||||
|
||||
entry = create_stack_entry (NULL, NULL);
|
||||
|
||||
return g_slist_prepend (stack, entry);
|
||||
}
|
||||
|
||||
void
|
||||
_cogl_free_framebuffer_stack (GSList *stack)
|
||||
{
|
||||
GSList *l;
|
||||
|
||||
for (l = stack; l != NULL; l = l->next)
|
||||
{
|
||||
CoglFramebufferStackEntry *entry = l->data;
|
||||
|
||||
if (entry->draw_buffer)
|
||||
cogl_object_unref (entry->draw_buffer);
|
||||
|
||||
if (entry->read_buffer)
|
||||
cogl_object_unref (entry->draw_buffer);
|
||||
|
||||
g_slice_free (CoglFramebufferStackEntry, entry);
|
||||
}
|
||||
g_slist_free (stack);
|
||||
}
|
||||
|
||||
static void
|
||||
notify_buffers_changed (CoglFramebuffer *old_draw_buffer,
|
||||
CoglFramebuffer *new_draw_buffer,
|
||||
CoglFramebuffer *old_read_buffer,
|
||||
CoglFramebuffer *new_read_buffer)
|
||||
{
|
||||
/* XXX: To support the deprecated cogl_set_draw_buffer API we keep
|
||||
* track of the last onscreen framebuffer that was set so that it
|
||||
* can be restored if the COGL_WINDOW_BUFFER enum is used. A
|
||||
* reference isn't taken to the framebuffer because otherwise we
|
||||
* would have a circular reference between the context and the
|
||||
* framebuffer. Instead the pointer is set to NULL in
|
||||
* _cogl_onscreen_free as a kind of a cheap weak reference */
|
||||
if (new_draw_buffer &&
|
||||
new_draw_buffer->type == COGL_FRAMEBUFFER_TYPE_ONSCREEN)
|
||||
new_draw_buffer->context->window_buffer = new_draw_buffer;
|
||||
}
|
||||
|
||||
/* Set the current framebuffer without checking if it's already the
|
||||
* current framebuffer. This is used by cogl_pop_framebuffer while
|
||||
* the top of the stack is currently not up to date. */
|
||||
static void
|
||||
_cogl_set_framebuffers_real (CoglFramebuffer *draw_buffer,
|
||||
CoglFramebuffer *read_buffer)
|
||||
{
|
||||
CoglFramebufferStackEntry *entry;
|
||||
|
||||
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
||||
|
||||
_COGL_RETURN_IF_FAIL (ctx != NULL);
|
||||
_COGL_RETURN_IF_FAIL (draw_buffer && read_buffer ?
|
||||
draw_buffer->context == read_buffer->context : TRUE);
|
||||
|
||||
entry = ctx->framebuffer_stack->data;
|
||||
|
||||
notify_buffers_changed (entry->draw_buffer,
|
||||
draw_buffer,
|
||||
entry->read_buffer,
|
||||
read_buffer);
|
||||
|
||||
if (draw_buffer)
|
||||
cogl_object_ref (draw_buffer);
|
||||
if (entry->draw_buffer)
|
||||
cogl_object_unref (entry->draw_buffer);
|
||||
|
||||
if (read_buffer)
|
||||
cogl_object_ref (read_buffer);
|
||||
if (entry->read_buffer)
|
||||
cogl_object_unref (entry->read_buffer);
|
||||
|
||||
entry->draw_buffer = draw_buffer;
|
||||
entry->read_buffer = read_buffer;
|
||||
}
|
||||
|
||||
static void
|
||||
_cogl_set_framebuffers (CoglFramebuffer *draw_buffer,
|
||||
CoglFramebuffer *read_buffer)
|
||||
{
|
||||
CoglFramebuffer *current_draw_buffer;
|
||||
CoglFramebuffer *current_read_buffer;
|
||||
|
||||
_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (draw_buffer));
|
||||
_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (read_buffer));
|
||||
|
||||
current_draw_buffer = cogl_get_draw_framebuffer ();
|
||||
current_read_buffer = _cogl_get_read_framebuffer ();
|
||||
|
||||
if (current_draw_buffer != draw_buffer ||
|
||||
current_read_buffer != read_buffer)
|
||||
_cogl_set_framebuffers_real (draw_buffer, read_buffer);
|
||||
}
|
||||
|
||||
void
|
||||
cogl_set_framebuffer (CoglFramebuffer *framebuffer)
|
||||
{
|
||||
_cogl_set_framebuffers (framebuffer, framebuffer);
|
||||
}
|
||||
|
||||
/* XXX: deprecated API */
|
||||
void
|
||||
cogl_set_draw_buffer (CoglBufferTarget target, CoglHandle handle)
|
||||
{
|
||||
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
||||
|
||||
if (target == COGL_WINDOW_BUFFER)
|
||||
handle = ctx->window_buffer;
|
||||
|
||||
/* This is deprecated public API. The public API doesn't currently
|
||||
really expose the concept of separate draw and read buffers so
|
||||
for the time being this actually just sets both buffers */
|
||||
cogl_set_framebuffer (handle);
|
||||
}
|
||||
|
||||
CoglFramebuffer *
|
||||
cogl_get_draw_framebuffer (void)
|
||||
{
|
||||
CoglFramebufferStackEntry *entry;
|
||||
|
||||
_COGL_GET_CONTEXT (ctx, NULL);
|
||||
|
||||
g_assert (ctx->framebuffer_stack);
|
||||
|
||||
entry = ctx->framebuffer_stack->data;
|
||||
|
||||
return entry->draw_buffer;
|
||||
}
|
||||
|
||||
CoglFramebuffer *
|
||||
_cogl_get_read_framebuffer (void)
|
||||
{
|
||||
CoglFramebufferStackEntry *entry;
|
||||
|
||||
_COGL_GET_CONTEXT (ctx, NULL);
|
||||
|
||||
g_assert (ctx->framebuffer_stack);
|
||||
|
||||
entry = ctx->framebuffer_stack->data;
|
||||
|
||||
return entry->read_buffer;
|
||||
}
|
||||
|
||||
void
|
||||
_cogl_push_framebuffers (CoglFramebuffer *draw_buffer,
|
||||
CoglFramebuffer *read_buffer)
|
||||
{
|
||||
CoglContext *ctx;
|
||||
CoglFramebuffer *old_draw_buffer, *old_read_buffer;
|
||||
|
||||
_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (draw_buffer));
|
||||
_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (read_buffer));
|
||||
|
||||
ctx = draw_buffer->context;
|
||||
_COGL_RETURN_IF_FAIL (ctx != NULL);
|
||||
_COGL_RETURN_IF_FAIL (draw_buffer->context == read_buffer->context);
|
||||
|
||||
_COGL_RETURN_IF_FAIL (ctx->framebuffer_stack != NULL);
|
||||
|
||||
/* Copy the top of the stack so that when we call cogl_set_framebuffer
|
||||
it will still know what the old framebuffer was */
|
||||
old_draw_buffer = cogl_get_draw_framebuffer ();
|
||||
if (old_draw_buffer)
|
||||
cogl_object_ref (old_draw_buffer);
|
||||
old_read_buffer = _cogl_get_read_framebuffer ();
|
||||
if (old_read_buffer)
|
||||
cogl_object_ref (old_read_buffer);
|
||||
ctx->framebuffer_stack =
|
||||
g_slist_prepend (ctx->framebuffer_stack,
|
||||
create_stack_entry (old_draw_buffer,
|
||||
old_read_buffer));
|
||||
|
||||
_cogl_set_framebuffers (draw_buffer, read_buffer);
|
||||
}
|
||||
|
||||
void
|
||||
cogl_push_framebuffer (CoglFramebuffer *buffer)
|
||||
{
|
||||
_cogl_push_framebuffers (buffer, buffer);
|
||||
}
|
||||
|
||||
/* XXX: deprecated API */
|
||||
void
|
||||
cogl_push_draw_buffer (void)
|
||||
{
|
||||
cogl_push_framebuffer (cogl_get_draw_framebuffer ());
|
||||
}
|
||||
|
||||
void
|
||||
cogl_pop_framebuffer (void)
|
||||
{
|
||||
CoglFramebufferStackEntry *to_pop;
|
||||
CoglFramebufferStackEntry *to_restore;
|
||||
|
||||
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
||||
|
||||
g_assert (ctx->framebuffer_stack != NULL);
|
||||
g_assert (ctx->framebuffer_stack->next != NULL);
|
||||
|
||||
to_pop = ctx->framebuffer_stack->data;
|
||||
to_restore = ctx->framebuffer_stack->next->data;
|
||||
|
||||
if (to_pop->draw_buffer != to_restore->draw_buffer ||
|
||||
to_pop->read_buffer != to_restore->read_buffer)
|
||||
notify_buffers_changed (to_pop->draw_buffer,
|
||||
to_restore->draw_buffer,
|
||||
to_pop->read_buffer,
|
||||
to_restore->read_buffer);
|
||||
|
||||
cogl_object_unref (to_pop->draw_buffer);
|
||||
cogl_object_unref (to_pop->read_buffer);
|
||||
g_slice_free (CoglFramebufferStackEntry, to_pop);
|
||||
|
||||
ctx->framebuffer_stack =
|
||||
g_slist_delete_link (ctx->framebuffer_stack,
|
||||
ctx->framebuffer_stack);
|
||||
}
|
||||
|
||||
/* XXX: deprecated API */
|
||||
void
|
||||
cogl_pop_draw_buffer (void)
|
||||
{
|
||||
cogl_pop_framebuffer ();
|
||||
}
|
||||
|
||||
CoglPixelFormat
|
||||
cogl_framebuffer_get_color_format (CoglFramebuffer *framebuffer)
|
||||
{
|
||||
return framebuffer->internal_format;
|
||||
}
|
||||
|
||||
|
||||
@ -27,6 +27,205 @@
|
||||
|
||||
#include <cogl/cogl-macros.h>
|
||||
|
||||
/**
|
||||
* cogl_set_framebuffer:
|
||||
* @buffer: A #CoglFramebuffer object, either onscreen or offscreen.
|
||||
*
|
||||
* This redirects all subsequent drawing to the specified framebuffer. This can
|
||||
* either be an offscreen buffer created with cogl_offscreen_new_to_texture ()
|
||||
* or in the future it may be an onscreen framebuffers too.
|
||||
*
|
||||
* Since: 1.2
|
||||
* Deprecated: 1.16: The latest drawing apis take explicit
|
||||
* #CoglFramebuffer arguments so this stack of
|
||||
* framebuffers shouldn't be used anymore.
|
||||
*/
|
||||
COGL_DEPRECATED_IN_1_16
|
||||
void
|
||||
cogl_set_framebuffer (CoglFramebuffer *buffer);
|
||||
|
||||
/**
|
||||
* cogl_push_framebuffer:
|
||||
* @buffer: A #CoglFramebuffer object, either onscreen or offscreen.
|
||||
*
|
||||
* Redirects all subsequent drawing to the specified framebuffer. This can
|
||||
* either be an offscreen buffer created with cogl_offscreen_new_to_texture ()
|
||||
* or in the future it may be an onscreen framebuffer too.
|
||||
*
|
||||
* You should understand that a framebuffer owns the following state:
|
||||
* <itemizedlist>
|
||||
* <listitem><simpara>The projection matrix</simpara></listitem>
|
||||
* <listitem><simpara>The modelview matrix stack</simpara></listitem>
|
||||
* <listitem><simpara>The viewport</simpara></listitem>
|
||||
* <listitem><simpara>The clip stack</simpara></listitem>
|
||||
* </itemizedlist>
|
||||
* So these items will automatically be saved and restored when you
|
||||
* push and pop between different framebuffers.
|
||||
*
|
||||
* Also remember a newly allocated framebuffer will have an identity matrix for
|
||||
* the projection and modelview matrices which gives you a coordinate space
|
||||
* like OpenGL with (-1, -1) corresponding to the top left of the viewport,
|
||||
* (1, 1) corresponding to the bottom right and +z coming out towards the
|
||||
* viewer.
|
||||
*
|
||||
* If you want to set up a coordinate space like Clutter does with (0, 0)
|
||||
* corresponding to the top left and (framebuffer_width, framebuffer_height)
|
||||
* corresponding to the bottom right you can do so like this:
|
||||
*
|
||||
* |[
|
||||
* static void
|
||||
* setup_viewport (unsigned int width,
|
||||
* unsigned int height,
|
||||
* float fovy,
|
||||
* float aspect,
|
||||
* float z_near,
|
||||
* float z_far)
|
||||
* {
|
||||
* float z_camera;
|
||||
* CoglMatrix projection_matrix;
|
||||
* CoglMatrix mv_matrix;
|
||||
*
|
||||
* cogl_set_viewport (0, 0, width, height);
|
||||
* cogl_perspective (fovy, aspect, z_near, z_far);
|
||||
*
|
||||
* cogl_get_projection_matrix (&projection_matrix);
|
||||
* z_camera = 0.5 * projection_matrix.xx;
|
||||
*
|
||||
* cogl_matrix_init_identity (&mv_matrix);
|
||||
* cogl_matrix_translate (&mv_matrix, -0.5f, -0.5f, -z_camera);
|
||||
* cogl_matrix_scale (&mv_matrix, 1.0f / width, -1.0f / height, 1.0f / width);
|
||||
* cogl_matrix_translate (&mv_matrix, 0.0f, -1.0 * height, 0.0f);
|
||||
* cogl_set_modelview_matrix (&mv_matrix);
|
||||
* }
|
||||
*
|
||||
* static void
|
||||
* my_init_framebuffer (ClutterStage *stage,
|
||||
* CoglFramebuffer *framebuffer,
|
||||
* unsigned int framebuffer_width,
|
||||
* unsigned int framebuffer_height)
|
||||
* {
|
||||
* ClutterPerspective perspective;
|
||||
*
|
||||
* clutter_stage_get_perspective (stage, &perspective);
|
||||
*
|
||||
* cogl_push_framebuffer (framebuffer);
|
||||
* setup_viewport (framebuffer_width,
|
||||
* framebuffer_height,
|
||||
* perspective.fovy,
|
||||
* perspective.aspect,
|
||||
* perspective.z_near,
|
||||
* perspective.z_far);
|
||||
* }
|
||||
* ]|
|
||||
*
|
||||
* The previous framebuffer can be restored by calling cogl_pop_framebuffer()
|
||||
*
|
||||
* Since: 1.2
|
||||
* Deprecated: 1.16: The latest drawing apis take explicit
|
||||
* #CoglFramebuffer arguments so this stack of
|
||||
* framebuffers shouldn't be used anymore.
|
||||
*/
|
||||
COGL_DEPRECATED_IN_1_16
|
||||
void
|
||||
cogl_push_framebuffer (CoglFramebuffer *buffer);
|
||||
|
||||
/**
|
||||
* cogl_pop_framebuffer:
|
||||
*
|
||||
* Restores the framebuffer that was previously at the top of the stack.
|
||||
* All subsequent drawing will be redirected to this framebuffer.
|
||||
*
|
||||
* Since: 1.2
|
||||
* Deprecated: 1.16: The latest drawing apis take explicit
|
||||
* #CoglFramebuffer arguments so this stack of
|
||||
* framebuffers shouldn't be used anymore.
|
||||
*/
|
||||
COGL_DEPRECATED_IN_1_16
|
||||
void
|
||||
cogl_pop_framebuffer (void);
|
||||
|
||||
/**
|
||||
* cogl_set_draw_buffer:
|
||||
* @target: A #CoglBufferTarget that specifies what kind of framebuffer you
|
||||
* are setting as the render target.
|
||||
* @offscreen: If you are setting a framebuffer of type COGL_OFFSCREEN_BUFFER
|
||||
* then this is a CoglHandle for the offscreen buffer.
|
||||
*
|
||||
* Redirects all subsequent drawing to the specified framebuffer. This
|
||||
* can either be an offscreen buffer created with
|
||||
* cogl_offscreen_new_to_texture () or you can revert to your original
|
||||
* on screen window buffer.
|
||||
*
|
||||
* Deprecated: 1.16: The latest drawing apis take explicit
|
||||
* #CoglFramebuffer arguments so this stack of
|
||||
* framebuffers shouldn't be used anymore.
|
||||
*/
|
||||
COGL_DEPRECATED_IN_1_16
|
||||
void
|
||||
cogl_set_draw_buffer (CoglBufferTarget target,
|
||||
CoglHandle offscreen);
|
||||
|
||||
/**
|
||||
* cogl_push_draw_buffer:
|
||||
*
|
||||
* Save cogl_set_draw_buffer() state.
|
||||
*
|
||||
* Deprecated: 1.16: The latest drawing apis take explicit
|
||||
* #CoglFramebuffer arguments so this stack of
|
||||
* framebuffers shouldn't be used anymore.
|
||||
*/
|
||||
COGL_DEPRECATED_IN_1_16
|
||||
void
|
||||
cogl_push_draw_buffer (void);
|
||||
|
||||
/**
|
||||
* cogl_pop_draw_buffer:
|
||||
*
|
||||
* Restore cogl_set_draw_buffer() state.
|
||||
*
|
||||
* Deprecated: 1.16: The latest drawing apis take explicit
|
||||
* #CoglFramebuffer arguments so this stack of
|
||||
* framebuffers shouldn't be used anymore.
|
||||
*/
|
||||
COGL_DEPRECATED_IN_1_16
|
||||
void
|
||||
cogl_pop_draw_buffer (void);
|
||||
|
||||
/**
|
||||
* cogl_read_pixels:
|
||||
* @x: The window x position to start reading from
|
||||
* @y: The window y position to start reading from
|
||||
* @width: The width of the rectangle you want to read
|
||||
* @height: The height of the rectangle you want to read
|
||||
* @source: Identifies which auxillary buffer you want to read
|
||||
* (only COGL_READ_PIXELS_COLOR_BUFFER supported currently)
|
||||
* @format: The pixel format you want the result in
|
||||
* (only COGL_PIXEL_FORMAT_RGBA_8888 supported currently)
|
||||
* @pixels: The location to write the pixel data.
|
||||
*
|
||||
* This reads a rectangle of pixels from the current framebuffer where
|
||||
* position (0, 0) is the top left. The pixel at (x, y) is the first
|
||||
* read, and the data is returned with a rowstride of (width * 4).
|
||||
*
|
||||
* Currently Cogl assumes that the framebuffer is in a premultiplied
|
||||
* format so if @format is non-premultiplied it will convert it. To
|
||||
* read the pixel values without any conversion you should either
|
||||
* specify a format that doesn't use an alpha channel or use one of
|
||||
* the formats ending in PRE.
|
||||
*
|
||||
* Deprecated: 1.16: Use cogl_framebuffer_read_pixels() instead
|
||||
*/
|
||||
COGL_DEPRECATED_IN_1_16_FOR (cogl_framebuffer_read_pixels)
|
||||
void
|
||||
cogl_read_pixels (int x,
|
||||
int y,
|
||||
int width,
|
||||
int height,
|
||||
CoglReadPixelsFlags source,
|
||||
CoglPixelFormat format,
|
||||
uint8_t *pixels);
|
||||
|
||||
|
||||
/* XXX: Since this api was marked unstable, maybe we can just
|
||||
* remove this api if we can't find anyone is using it. */
|
||||
/**
|
||||
|
||||
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Reference in New Issue
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