/** Called from ctx->Driver.Viewport() */
static void
i830Viewport(GLcontext * ctx,
GLint x, GLint y, GLsizei width, GLsizei height)
{
intelCalcViewport(ctx);
intel_viewport(ctx, x, y, width, height);
}
static void
intel_noninvalidate_viewport(struct gl_context *ctx)
{
struct intel_context *intel = intel_context(ctx);
__DRIcontext *driContext = intel->driContext;
intelCalcViewport(ctx);
if (_mesa_is_winsys_fbo(ctx->DrawBuffer)) {
dri2InvalidateDrawable(driContext->driDrawablePriv);
dri2InvalidateDrawable(driContext->driReadablePriv);
}
}
static void
intelDepthRange(GLcontext * ctx, GLclampd nearval, GLclampd farval)
{
intelCalcViewport(ctx);
}
static void
intelViewport(GLcontext * ctx,
GLint x, GLint y, GLsizei width, GLsizei height)
{
intelCalcViewport(ctx);
}
/**
* Update the hardware state for drawing into a window or framebuffer object.
*
* Called by glDrawBuffer, glBindFramebufferEXT, MakeCurrent, and other
* places within the driver.
*
* Basically, this needs to be called any time the current framebuffer
* changes, the renderbuffers change, or we need to draw into different
* color buffers.
*/
void
intel_draw_buffer(struct gl_context * ctx, struct gl_framebuffer *fb)
{
struct intel_context *intel = intel_context(ctx);
struct intel_region *colorRegions[MAX_DRAW_BUFFERS], *depthRegion = NULL;
struct intel_renderbuffer *irbDepth = NULL, *irbStencil = NULL;
if (!fb) {
/* this can happen during the initial context initialization */
return;
}
/* Do this here, not core Mesa, since this function is called from
* many places within the driver.
*/
if (ctx->NewState & _NEW_BUFFERS) {
/* this updates the DrawBuffer->_NumColorDrawBuffers fields, etc */
_mesa_update_framebuffer(ctx);
/* this updates the DrawBuffer's Width/Height if it's a FBO */
_mesa_update_draw_buffer_bounds(ctx);
}
if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
/* this may occur when we're called by glBindFrameBuffer() during
* the process of someone setting up renderbuffers, etc.
*/
/*_mesa_debug(ctx, "DrawBuffer: incomplete user FBO\n");*/
return;
}
/* How many color buffers are we drawing into?
*
* If there are zero buffers or the buffer is too big, don't configure any
* regions for hardware drawing. We'll fallback to software below. Not
* having regions set makes some of the software fallback paths faster.
*/
if ((fb->Width > ctx->Const.MaxRenderbufferSize)
|| (fb->Height > ctx->Const.MaxRenderbufferSize)
|| (fb->_NumColorDrawBuffers == 0)) {
/* writing to 0 */
colorRegions[0] = NULL;
}
else if (fb->_NumColorDrawBuffers > 1) {
int i;
struct intel_renderbuffer *irb;
for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
irb = intel_renderbuffer(fb->_ColorDrawBuffers[i]);
colorRegions[i] = irb ? irb->region : NULL;
}
}
else {
/* Get the intel_renderbuffer for the single colorbuffer we're drawing
* into.
*/
if (fb->Name == 0) {
/* drawing to window system buffer */
if (fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT)
colorRegions[0] = intel_get_rb_region(fb, BUFFER_FRONT_LEFT);
else
colorRegions[0] = intel_get_rb_region(fb, BUFFER_BACK_LEFT);
}
else {
/* drawing to user-created FBO */
struct intel_renderbuffer *irb;
irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
colorRegions[0] = (irb && irb->region) ? irb->region : NULL;
}
}
if (!colorRegions[0]) {
FALLBACK(intel, INTEL_FALLBACK_DRAW_BUFFER, GL_TRUE);
}
else {
FALLBACK(intel, INTEL_FALLBACK_DRAW_BUFFER, GL_FALSE);
}
/***
*** Get depth buffer region and check if we need a software fallback.
*** Note that the depth buffer is usually a DEPTH_STENCIL buffer.
***/
if (fb->_DepthBuffer && fb->_DepthBuffer->Wrapped) {
irbDepth = intel_renderbuffer(fb->_DepthBuffer->Wrapped);
if (irbDepth && irbDepth->region) {
FALLBACK(intel, INTEL_FALLBACK_DEPTH_BUFFER, GL_FALSE);
depthRegion = irbDepth->region;
}
else {
FALLBACK(intel, INTEL_FALLBACK_DEPTH_BUFFER, GL_TRUE);
depthRegion = NULL;
}
}
else {
/* not using depth buffer */
FALLBACK(intel, INTEL_FALLBACK_DEPTH_BUFFER, GL_FALSE);
depthRegion = NULL;
}
/***
*** Stencil buffer
*** This can only be hardware accelerated if we're using a
*** combined DEPTH_STENCIL buffer.
***/
if (fb->_StencilBuffer && fb->_StencilBuffer->Wrapped) {
irbStencil = intel_renderbuffer(fb->_StencilBuffer->Wrapped);
if (irbStencil && irbStencil->region) {
ASSERT(irbStencil->Base.Format == MESA_FORMAT_S8_Z24);
FALLBACK(intel, INTEL_FALLBACK_STENCIL_BUFFER, GL_FALSE);
}
else {
FALLBACK(intel, INTEL_FALLBACK_STENCIL_BUFFER, GL_TRUE);
}
}
else {
/* XXX FBO: instead of FALSE, pass ctx->Stencil._Enabled ??? */
FALLBACK(intel, INTEL_FALLBACK_STENCIL_BUFFER, GL_FALSE);
}
/* If we have a (packed) stencil buffer attached but no depth buffer,
* we still need to set up the shared depth/stencil state so we can use it.
*/
if (depthRegion == NULL && irbStencil && irbStencil->region)
depthRegion = irbStencil->region;
/*
* Update depth and stencil test state
*/
if (ctx->Driver.Enable) {
ctx->Driver.Enable(ctx, GL_DEPTH_TEST,
(ctx->Depth.Test && fb->Visual.depthBits > 0));
ctx->Driver.Enable(ctx, GL_STENCIL_TEST,
(ctx->Stencil.Enabled && fb->Visual.stencilBits > 0));
}
else {
/* Mesa's Stencil._Enabled field is updated when
* _NEW_BUFFERS | _NEW_STENCIL, but i965 code assumes that the value
* only changes with _NEW_STENCIL (which seems sensible). So flag it
* here since this is the _NEW_BUFFERS path.
*/
intel->NewGLState |= (_NEW_DEPTH | _NEW_STENCIL);
}
intel->vtbl.set_draw_region(intel, colorRegions, depthRegion,
fb->_NumColorDrawBuffers);
intel->NewGLState |= _NEW_BUFFERS;
/* update viewport since it depends on window size */
#ifdef I915
intelCalcViewport(ctx);
#else
intel->NewGLState |= _NEW_VIEWPORT;
#endif
/* Set state we know depends on drawable parameters:
*/
if (ctx->Driver.Scissor)
ctx->Driver.Scissor(ctx, ctx->Scissor.X, ctx->Scissor.Y,
ctx->Scissor.Width, ctx->Scissor.Height);
intel->NewGLState |= _NEW_SCISSOR;
if (ctx->Driver.DepthRange)
ctx->Driver.DepthRange(ctx,
ctx->Viewport.Near,
ctx->Viewport.Far);
/* Update culling direction which changes depending on the
* orientation of the buffer:
*/
if (ctx->Driver.FrontFace)
ctx->Driver.FrontFace(ctx, ctx->Polygon.FrontFace);
else
intel->NewGLState |= _NEW_POLYGON;
}
/** Called from ctx->Driver.DepthRange() */
static void
i915DepthRange(struct gl_context * ctx, GLclampd nearval, GLclampd farval)
{
intelCalcViewport(ctx);
}
/** Called from ctx->Driver.Viewport() */
static void
i915Viewport(struct gl_context * ctx,
GLint x, GLint y, GLsizei width, GLsizei height)
{
intelCalcViewport(ctx);
}
static void
intel_viewport(struct gl_context *ctx)
{
intelCalcViewport(ctx);
}
/** Called from ctx->Driver.DepthRange() */
static void
i830DepthRange(struct gl_context *ctx)
{
intelCalcViewport(ctx);
}
