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authorBrian Paul <[email protected]>2005-05-04 20:11:35 +0000
committerBrian Paul <[email protected]>2005-05-04 20:11:35 +0000
commite4b2356c07d31fbeeabb13b2fb47db703b473080 (patch)
treed8b7f1c7c9e7c84d84349485f942dd205dd4c16d /src/mesa/drivers/x11/xm_buffer.c
parentebef61f5c0950572f9c6a81b08f447957461675c (diff)
Major check-in of changes for GL_EXT_framebuffer_object extension.
Main driver impacts: - new code for creating the Mesa GLframebuffer - new span/pixel read/write code Some drivers not yet updated/tested.
Diffstat (limited to 'src/mesa/drivers/x11/xm_buffer.c')
-rw-r--r--src/mesa/drivers/x11/xm_buffer.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/src/mesa/drivers/x11/xm_buffer.c b/src/mesa/drivers/x11/xm_buffer.c
new file mode 100644
index 00000000000..9f481aaba12
--- /dev/null
+++ b/src/mesa/drivers/x11/xm_buffer.c
@@ -0,0 +1,111 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "glxheader.h"
+#include "GL/xmesa.h"
+#include "xmesaP.h"
+#include "imports.h"
+#include "renderbuffer.h"
+
+
+static void
+xmesa_delete_renderbuffer(struct gl_renderbuffer *rb)
+{
+ /* XXX this routine should really delete the attached ximage, etc. */
+}
+
+
+/**
+ * Reallocate renderbuffer storage.
+ * This is called when the window's resized. It'll get called once for
+ * the front color renderbuffer and again for the back color renderbuffer.
+ */
+static GLboolean
+xmesa_alloc_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLenum internalFormat, GLuint width, GLuint height)
+{
+ struct xmesa_renderbuffer *xrb = (struct xmesa_renderbuffer *) rb;
+
+ if (xrb->ximage) {
+ /* Needed by PIXELADDR1 macro */
+ xrb->width1 = xrb->ximage->bytes_per_line;
+ xrb->origin1 = (GLubyte *) xrb->ximage->data + xrb->width1 * (height - 1);
+
+ /* Needed by PIXELADDR2 macro */
+ xrb->width2 = xrb->ximage->bytes_per_line / 2;
+ xrb->origin2 = (GLushort *) xrb->ximage->data + xrb->width2 * (height - 1);
+
+ /* Needed by PIXELADDR3 macro */
+ xrb->width3 = xrb->ximage->bytes_per_line;
+ xrb->origin3 = (GLubyte *) xrb->ximage->data + xrb->width3 * (height - 1);
+
+ /* Needed by PIXELADDR4 macro */
+ xrb->width4 = xrb->ximage->width;
+ xrb->origin4 = (GLuint *) xrb->ximage->data + xrb->width4 * (height - 1);
+ }
+ else {
+ assert(xrb->pixmap);
+ }
+
+ /* for the FLIP macro: */
+ xrb->bottom = height - 1;
+
+ rb->Width = width;
+ rb->Height = height;
+ rb->InternalFormat = internalFormat;
+
+ return GL_TRUE;
+}
+
+
+struct xmesa_renderbuffer *
+xmesa_new_renderbuffer(GLcontext *ctx, GLuint name, GLboolean rgbMode)
+{
+ struct xmesa_renderbuffer *xrb = CALLOC_STRUCT(xmesa_renderbuffer);
+ if (xrb) {
+ GLuint name = 0;
+ _mesa_init_renderbuffer(&xrb->Base, name);
+
+ xrb->Base.Delete = xmesa_delete_renderbuffer;
+ xrb->Base.AllocStorage = xmesa_alloc_storage;
+
+ if (rgbMode) {
+ xrb->Base.InternalFormat = GL_RGBA;
+ xrb->Base._BaseFormat = GL_RGBA;
+ xrb->Base.DataType = GL_UNSIGNED_BYTE;
+ }
+ else {
+ xrb->Base.InternalFormat = GL_COLOR_INDEX;
+ xrb->Base._BaseFormat = GL_COLOR_INDEX;
+ xrb->Base.DataType = GL_UNSIGNED_INT;
+ }
+ xrb->Base.ComponentSizes[0] = 0; /* XXX fix? */
+ }
+ return xrb;
+}
+
+
+
+