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Diffstat (limited to 'src/mesa/drivers/dri/common/drirenderbuffer.c')
-rw-r--r--src/mesa/drivers/dri/common/drirenderbuffer.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/common/drirenderbuffer.c b/src/mesa/drivers/dri/common/drirenderbuffer.c
new file mode 100644
index 00000000000..3d9574f0cf2
--- /dev/null
+++ b/src/mesa/drivers/dri/common/drirenderbuffer.c
@@ -0,0 +1,96 @@
+
+#include "mtypes.h"
+#include "drirenderbuffer.h"
+#include "renderbuffer.h"
+#include "imports.h"
+
+
+/**
+ * This will get called when a window is resized.
+ * Just update width, height and internal format fields for now.
+ */
+static GLboolean
+driRenderbufferStorage(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLenum internalFormat, GLuint width, GLuint height)
+{
+ rb->Width = width;
+ rb->Height = height;
+ rb->InternalFormat = internalFormat;
+ return GL_TRUE;
+}
+
+
+/**
+ * Allocate a new driRenderbuffer object.
+ * Individual drivers are free to implement different versions of
+ * this function.
+ * \param format Either GL_RGBA, GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24,
+ * GL_DEPTH_COMPONENT32, or GL_STENCIL_INDEX8_EXT (for now).
+ * \param cpp chars or bytes per pixel
+ * \param offset start of buffer with respect to framebuffer address
+ * \param pitch pixels per row
+ */
+driRenderbuffer *
+driNewRenderbuffer(GLenum format, GLint cpp, GLint offset, GLint pitch)
+{
+ driRenderbuffer *drb;
+
+ assert(format == GL_RGBA ||
+ format == GL_DEPTH_COMPONENT16 ||
+ format == GL_DEPTH_COMPONENT24 ||
+ format == GL_DEPTH_COMPONENT32 ||
+ format == GL_STENCIL_INDEX8_EXT);
+
+ assert(cpp > 0);
+ assert(pitch > 0);
+
+ drb = _mesa_calloc(sizeof(driRenderbuffer));
+ if (drb) {
+ const GLuint name = 0;
+
+ _mesa_init_renderbuffer(&drb->Base, name);
+
+ /* Make sure we're using a null-valued GetPointer routine */
+ assert(drb->Base.GetPointer(NULL, &drb->Base, 0, 0) == NULL);
+
+ drb->Base.InternalFormat = format;
+
+ if (format == GL_RGBA) {
+ /* Color */
+ drb->Base._BaseFormat = GL_RGBA;
+ drb->Base.DataType = GL_UNSIGNED_BYTE;
+ }
+ else if (format == GL_DEPTH_COMPONENT16) {
+ /* Depth */
+ drb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+ /* we always Get/Put 32-bit Z values */
+ drb->Base.DataType = GL_UNSIGNED_INT;
+ }
+ else if (format == GL_DEPTH_COMPONENT24) {
+ /* Depth */
+ drb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+ /* we always Get/Put 32-bit Z values */
+ drb->Base.DataType = GL_UNSIGNED_INT;
+ }
+ else {
+ /* Stencil */
+ ASSERT(format == GL_STENCIL_INDEX8);
+ drb->Base._BaseFormat = GL_STENCIL_INDEX;
+ drb->Base.DataType = GL_UNSIGNED_BYTE;
+ }
+
+ /* XXX if we were allocating a user-created renderbuffer, we'd have
+ * to fill in the ComponentSizes[] array too.
+ */
+
+ drb->Base.AllocStorage = driRenderbufferStorage;
+ /* using default Delete function */
+
+
+ /* DRI renderbuffer-specific fields: */
+ drb->offset = offset;
+ drb->pitch = pitch;
+ drb->cpp = cpp;
+ }
+ return drb;
+}