/**
* Update a gl_framebuffer's derived state.
*
* Specifically, update these framebuffer fields:
* _ColorDrawBuffers
* _NumColorDrawBuffers
* _ColorReadBuffer
*
* If the framebuffer is user-created, make sure it's complete.
*
* The following functions (at least) can effect framebuffer state:
* glReadBuffer, glDrawBuffer, glDrawBuffersARB, glFramebufferRenderbufferEXT,
* glRenderbufferStorageEXT.
*/
static void
update_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
{
if (_mesa_is_winsys_fbo(fb)) {
/* This is a window-system framebuffer */
/* Need to update the FB's GL_DRAW_BUFFER state to match the
* context state (GL_READ_BUFFER too).
*/
if (fb->ColorDrawBuffer[0] != ctx->Color.DrawBuffer[0]) {
_mesa_drawbuffers(ctx, fb, ctx->Const.MaxDrawBuffers,
ctx->Color.DrawBuffer, NULL);
}
}
else {
/* This is a user-created framebuffer.
* Completeness only matters for user-created framebuffers.
*/
if (fb->_Status != GL_FRAMEBUFFER_COMPLETE) {
_mesa_test_framebuffer_completeness(ctx, fb);
}
}
/* Strictly speaking, we don't need to update the draw-state
* if this FB is bound as ctx->ReadBuffer (and conversely, the
* read-state if this FB is bound as ctx->DrawBuffer), but no
* harm.
*/
update_color_draw_buffers(ctx, fb);
update_color_read_buffer(ctx, fb);
compute_depth_max(fb);
}
/**
* Initialize a gl_framebuffer object. Typically used to initialize
* window system-created framebuffers, not user-created framebuffers.
* \sa _mesa_create_framebuffer
*/
void
_mesa_initialize_framebuffer(struct gl_framebuffer *fb, const GLvisual *visual)
{
assert(fb);
assert(visual);
_mesa_bzero(fb, sizeof(struct gl_framebuffer));
_glthread_INIT_MUTEX(fb->Mutex);
fb->RefCount = 1;
/* save the visual */
fb->Visual = *visual;
/* Init glRead/DrawBuffer state */
if (visual->doubleBufferMode) {
fb->ColorDrawBuffer[0] = GL_BACK;
fb->_ColorDrawBufferMask[0] = BUFFER_BIT_BACK_LEFT;
fb->ColorReadBuffer = GL_BACK;
fb->_ColorReadBufferIndex = BUFFER_BACK_LEFT;
}
else {
fb->ColorDrawBuffer[0] = GL_FRONT;
fb->_ColorDrawBufferMask[0] = BUFFER_BIT_FRONT_LEFT;
fb->ColorReadBuffer = GL_FRONT;
fb->_ColorReadBufferIndex = BUFFER_FRONT_LEFT;
}
fb->Delete = _mesa_destroy_framebuffer;
fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
compute_depth_max(fb);
}
static void
update_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
{
/* Completeness only matters for user-created framebuffers */
if (fb->Name != 0) {
/* XXX: EXT_framebuffer_blit:
framebuffer must still be complete wrt read/draw? */
_mesa_test_framebuffer_completeness(ctx, fb);
_mesa_update_framebuffer_visual(fb);
}
/* update_color_draw/read_buffers not needed for
read/draw only fb, but shouldn't hurt ??? */
update_color_draw_buffers(ctx, fb);
update_color_read_buffer(ctx, fb);
_mesa_update_depth_buffer(ctx, fb, BUFFER_DEPTH);
_mesa_update_stencil_buffer(ctx, fb, BUFFER_STENCIL);
compute_depth_max(fb);
}
/**
* Initialize a gl_framebuffer object. Typically used to initialize
* window system-created framebuffers, not user-created framebuffers.
* \sa _mesa_initialize_user_framebuffer
*/
void
_mesa_initialize_window_framebuffer(struct gl_framebuffer *fb,
const struct gl_config *visual)
{
assert(fb);
assert(visual);
memset(fb, 0, sizeof(struct gl_framebuffer));
mtx_init(&fb->Mutex, mtx_plain);
fb->RefCount = 1;
/* save the visual */
fb->Visual = *visual;
/* Init read/draw renderbuffer state */
if (visual->doubleBufferMode) {
fb->_NumColorDrawBuffers = 1;
fb->ColorDrawBuffer[0] = GL_BACK;
fb->_ColorDrawBufferIndexes[0] = BUFFER_BACK_LEFT;
fb->ColorReadBuffer = GL_BACK;
fb->_ColorReadBufferIndex = BUFFER_BACK_LEFT;
}
else {
fb->_NumColorDrawBuffers = 1;
fb->ColorDrawBuffer[0] = GL_FRONT;
fb->_ColorDrawBufferIndexes[0] = BUFFER_FRONT_LEFT;
fb->ColorReadBuffer = GL_FRONT;
fb->_ColorReadBufferIndex = BUFFER_FRONT_LEFT;
}
fb->Delete = _mesa_destroy_framebuffer;
fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
fb->_AllColorBuffersFixedPoint = !visual->floatMode;
fb->_HasSNormOrFloatColorBuffer = visual->floatMode;
fb->_HasAttachments = true;
compute_depth_max(fb);
}
/**
* Initialize a gl_framebuffer object. Typically used to initialize
* window system-created framebuffers, not user-created framebuffers.
* \sa _mesa_initialize_user_framebuffer
*/
void
_mesa_initialize_window_framebuffer(struct gl_framebuffer *fb,
const struct gl_config *visual)
{
assert(fb);
assert(visual);
memset(fb, 0, sizeof(struct gl_framebuffer));
_glthread_INIT_MUTEX(fb->Mutex);
fb->RefCount = 1;
/* save the visual */
fb->Visual = *visual;
/* Init read/draw renderbuffer state */
if (visual->doubleBufferMode) {
fb->_NumColorDrawBuffers = 1;
fb->ColorDrawBuffer[0] = GL_BACK;
fb->_ColorDrawBufferIndexes[0] = BUFFER_BACK_LEFT;
fb->ColorReadBuffer = GL_BACK;
fb->_ColorReadBufferIndex = BUFFER_BACK_LEFT;
}
else {
fb->_NumColorDrawBuffers = 1;
fb->ColorDrawBuffer[0] = GL_FRONT;
fb->_ColorDrawBufferIndexes[0] = BUFFER_FRONT_LEFT;
fb->ColorReadBuffer = GL_FRONT;
fb->_ColorReadBufferIndex = BUFFER_FRONT_LEFT;
}
fb->Delete = _mesa_destroy_framebuffer;
fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
compute_depth_max(fb);
}
/**
* The glGet queries of the framebuffer red/green/blue size, stencil size,
* etc. are satisfied by the fields of ctx->DrawBuffer->Visual. These can
* change depending on the renderbuffer bindings. This function updates
* the given framebuffer's Visual from the current renderbuffer bindings.
*
* This may apply to user-created framebuffers or window system framebuffers.
*
* Also note: ctx->DrawBuffer->Visual.depthBits might not equal
* ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer.DepthBits.
* The former one is used to convert floating point depth values into
* integer Z values.
*/
void
_mesa_update_framebuffer_visual(struct gl_context *ctx,
struct gl_framebuffer *fb)
{
GLuint i;
memset(&fb->Visual, 0, sizeof(fb->Visual));
fb->Visual.rgbMode = GL_TRUE; /* assume this */
/* find first RGB renderbuffer */
for (i = 0; i < BUFFER_COUNT; i++) {
if (fb->Attachment[i].Renderbuffer) {
const struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
const mesa_format fmt = rb->Format;
/* Grab samples and sampleBuffers from any attachment point (assuming
* the framebuffer is complete, we'll get the same answer from all
* attachments).
*/
fb->Visual.samples = rb->NumSamples;
fb->Visual.sampleBuffers = rb->NumSamples > 0 ? 1 : 0;
if (_mesa_is_legal_color_format(ctx, baseFormat)) {
fb->Visual.redBits = _mesa_get_format_bits(fmt, GL_RED_BITS);
fb->Visual.greenBits = _mesa_get_format_bits(fmt, GL_GREEN_BITS);
fb->Visual.blueBits = _mesa_get_format_bits(fmt, GL_BLUE_BITS);
fb->Visual.alphaBits = _mesa_get_format_bits(fmt, GL_ALPHA_BITS);
fb->Visual.rgbBits = fb->Visual.redBits
+ fb->Visual.greenBits + fb->Visual.blueBits;
if (_mesa_get_format_color_encoding(fmt) == GL_SRGB)
fb->Visual.sRGBCapable = ctx->Extensions.EXT_framebuffer_sRGB;
break;
}
}
}
fb->Visual.floatMode = GL_FALSE;
for (i = 0; i < BUFFER_COUNT; i++) {
if (fb->Attachment[i].Renderbuffer) {
const struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
const mesa_format fmt = rb->Format;
if (_mesa_get_format_datatype(fmt) == GL_FLOAT) {
fb->Visual.floatMode = GL_TRUE;
break;
}
}
}
if (fb->Attachment[BUFFER_DEPTH].Renderbuffer) {
const struct gl_renderbuffer *rb =
fb->Attachment[BUFFER_DEPTH].Renderbuffer;
const mesa_format fmt = rb->Format;
fb->Visual.haveDepthBuffer = GL_TRUE;
fb->Visual.depthBits = _mesa_get_format_bits(fmt, GL_DEPTH_BITS);
}
if (fb->Attachment[BUFFER_STENCIL].Renderbuffer) {
const struct gl_renderbuffer *rb =
fb->Attachment[BUFFER_STENCIL].Renderbuffer;
const mesa_format fmt = rb->Format;
fb->Visual.haveStencilBuffer = GL_TRUE;
fb->Visual.stencilBits = _mesa_get_format_bits(fmt, GL_STENCIL_BITS);
}
if (fb->Attachment[BUFFER_ACCUM].Renderbuffer) {
const struct gl_renderbuffer *rb =
fb->Attachment[BUFFER_ACCUM].Renderbuffer;
const mesa_format fmt = rb->Format;
fb->Visual.haveAccumBuffer = GL_TRUE;
fb->Visual.accumRedBits = _mesa_get_format_bits(fmt, GL_RED_BITS);
fb->Visual.accumGreenBits = _mesa_get_format_bits(fmt, GL_GREEN_BITS);
fb->Visual.accumBlueBits = _mesa_get_format_bits(fmt, GL_BLUE_BITS);
fb->Visual.accumAlphaBits = _mesa_get_format_bits(fmt, GL_ALPHA_BITS);
}
compute_depth_max(fb);
}
/**
* The glGet queries of the framebuffer red/green/blue size, stencil size,
* etc. are satisfied by the fields of ctx->DrawBuffer->Visual. These can
* change depending on the renderbuffer bindings. This function updates
* the given framebuffer's Visual from the current renderbuffer bindings.
*
* This may apply to user-created framebuffers or window system framebuffers.
*
* Also note: ctx->DrawBuffer->Visual.depthBits might not equal
* ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer.DepthBits.
* The former one is used to convert floating point depth values into
* integer Z values.
*/
void
_mesa_update_framebuffer_visual(struct gl_context *ctx,
struct gl_framebuffer *fb)
{
GLuint i;
memset(&fb->Visual, 0, sizeof(fb->Visual));
fb->Visual.rgbMode = GL_TRUE; /* assume this */
#if 0 /* this _might_ be needed */
if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
/* leave visual fields zero'd */
return;
}
#endif
/* find first RGB renderbuffer */
for (i = 0; i < BUFFER_COUNT; i++) {
if (fb->Attachment[i].Renderbuffer) {
const struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
const gl_format fmt = rb->Format;
if (_mesa_is_legal_color_format(ctx, baseFormat)) {
fb->Visual.redBits = _mesa_get_format_bits(fmt, GL_RED_BITS);
fb->Visual.greenBits = _mesa_get_format_bits(fmt, GL_GREEN_BITS);
fb->Visual.blueBits = _mesa_get_format_bits(fmt, GL_BLUE_BITS);
fb->Visual.alphaBits = _mesa_get_format_bits(fmt, GL_ALPHA_BITS);
fb->Visual.rgbBits = fb->Visual.redBits
+ fb->Visual.greenBits + fb->Visual.blueBits;
fb->Visual.samples = rb->NumSamples;
fb->Visual.sampleBuffers = rb->NumSamples > 0 ? 1 : 0;
if (_mesa_get_format_color_encoding(fmt) == GL_SRGB)
fb->Visual.sRGBCapable = ctx->Const.sRGBCapable;
break;
}
}
}
fb->Visual.floatMode = GL_FALSE;
for (i = 0; i < BUFFER_COUNT; i++) {
if (fb->Attachment[i].Renderbuffer) {
const struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
const gl_format fmt = rb->Format;
if (_mesa_get_format_datatype(fmt) == GL_FLOAT) {
fb->Visual.floatMode = GL_TRUE;
break;
}
}
}
if (fb->Attachment[BUFFER_DEPTH].Renderbuffer) {
const struct gl_renderbuffer *rb =
fb->Attachment[BUFFER_DEPTH].Renderbuffer;
const gl_format fmt = rb->Format;
fb->Visual.haveDepthBuffer = GL_TRUE;
fb->Visual.depthBits = _mesa_get_format_bits(fmt, GL_DEPTH_BITS);
}
if (fb->Attachment[BUFFER_STENCIL].Renderbuffer) {
const struct gl_renderbuffer *rb =
fb->Attachment[BUFFER_STENCIL].Renderbuffer;
const gl_format fmt = rb->Format;
fb->Visual.haveStencilBuffer = GL_TRUE;
fb->Visual.stencilBits = _mesa_get_format_bits(fmt, GL_STENCIL_BITS);
}
if (fb->Attachment[BUFFER_ACCUM].Renderbuffer) {
const struct gl_renderbuffer *rb =
fb->Attachment[BUFFER_ACCUM].Renderbuffer;
const gl_format fmt = rb->Format;
fb->Visual.haveAccumBuffer = GL_TRUE;
fb->Visual.accumRedBits = _mesa_get_format_bits(fmt, GL_RED_BITS);
fb->Visual.accumGreenBits = _mesa_get_format_bits(fmt, GL_GREEN_BITS);
fb->Visual.accumBlueBits = _mesa_get_format_bits(fmt, GL_BLUE_BITS);
fb->Visual.accumAlphaBits = _mesa_get_format_bits(fmt, GL_ALPHA_BITS);
}
compute_depth_max(fb);
}
/**
* The glGet queries of the framebuffer red/green/blue size, stencil size,
* etc. are satisfied by the fields of ctx->DrawBuffer->Visual. These can
* change depending on the renderbuffer bindings. This function updates
* the given framebuffer's Visual from the current renderbuffer bindings.
*
* This may apply to user-created framebuffers or window system framebuffers.
*
* Also note: ctx->DrawBuffer->Visual.depthBits might not equal
* ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer.DepthBits.
* The former one is used to convert floating point depth values into
* integer Z values.
*/
void
_mesa_update_framebuffer_visual(struct gl_framebuffer *fb)
{
GLuint i;
_mesa_bzero(&fb->Visual, sizeof(fb->Visual));
fb->Visual.rgbMode = GL_TRUE; /* assume this */
#if 0 /* this _might_ be needed */
if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
/* leave visual fields zero'd */
return;
}
#endif
/* find first RGB or CI renderbuffer */
for (i = 0; i < BUFFER_COUNT; i++) {
if (fb->Attachment[i].Renderbuffer) {
const struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
if (rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB) {
fb->Visual.redBits = rb->RedBits;
fb->Visual.greenBits = rb->GreenBits;
fb->Visual.blueBits = rb->BlueBits;
fb->Visual.alphaBits = rb->AlphaBits;
fb->Visual.rgbBits = fb->Visual.redBits
+ fb->Visual.greenBits + fb->Visual.blueBits;
fb->Visual.floatMode = GL_FALSE;
break;
}
else if (rb->_BaseFormat == GL_COLOR_INDEX) {
fb->Visual.indexBits = rb->IndexBits;
fb->Visual.rgbMode = GL_FALSE;
break;
}
}
}
if (fb->Attachment[BUFFER_DEPTH].Renderbuffer) {
fb->Visual.haveDepthBuffer = GL_TRUE;
fb->Visual.depthBits
= fb->Attachment[BUFFER_DEPTH].Renderbuffer->DepthBits;
}
if (fb->Attachment[BUFFER_STENCIL].Renderbuffer) {
fb->Visual.haveStencilBuffer = GL_TRUE;
fb->Visual.stencilBits
= fb->Attachment[BUFFER_STENCIL].Renderbuffer->StencilBits;
}
if (fb->Attachment[BUFFER_ACCUM].Renderbuffer) {
fb->Visual.haveAccumBuffer = GL_TRUE;
fb->Visual.accumRedBits
= fb->Attachment[BUFFER_ACCUM].Renderbuffer->RedBits;
fb->Visual.accumGreenBits
= fb->Attachment[BUFFER_ACCUM].Renderbuffer->GreenBits;
fb->Visual.accumBlueBits
= fb->Attachment[BUFFER_ACCUM].Renderbuffer->BlueBits;
fb->Visual.accumAlphaBits
= fb->Attachment[BUFFER_ACCUM].Renderbuffer->AlphaBits;
}
compute_depth_max(fb);
}