/**
* 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.
*/
static void
brw_update_draw_buffer(struct intel_context *intel)
{
struct gl_context *ctx = &intel->ctx;
struct gl_framebuffer *fb = ctx->DrawBuffer;
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;
}
/* 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);
/* The driver uses this in places that need to look up
* renderbuffers' buffer objects.
*/
intel->NewGLState |= _NEW_BUFFERS;
/* update viewport/scissor since it depends on window size */
intel->NewGLState |= _NEW_VIEWPORT | _NEW_SCISSOR;
/* Update culling direction which changes depending on the
* orientation of the buffer:
*/
intel->NewGLState |= _NEW_POLYGON;
}
void
_mesa_blit_framebuffer(struct gl_context *ctx,
struct gl_framebuffer *readFb,
struct gl_framebuffer *drawFb,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter, const char *func)
{
const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |
GL_DEPTH_BUFFER_BIT |
GL_STENCIL_BUFFER_BIT);
FLUSH_VERTICES(ctx, 0);
/* Update completeness status of readFb and drawFb. */
_mesa_update_framebuffer(ctx, readFb, drawFb);
/* Make sure drawFb has an initialized bounding box. */
_mesa_update_draw_buffer_bounds(ctx, drawFb);
if (!readFb || !drawFb) {
/* This will normally never happen but someday we may want to
* support MakeCurrent() with no drawables.
*/
return;
}
/* check for complete framebuffers */
if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
_mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
"%s(incomplete draw/read buffers)", func);
return;
}
if (!is_valid_blit_filter(ctx, filter)) {
_mesa_error(ctx, GL_INVALID_ENUM, "%s(invalid filter %s)", func,
_mesa_enum_to_string(filter));
return;
}
if ((filter == GL_SCALED_RESOLVE_FASTEST_EXT ||
filter == GL_SCALED_RESOLVE_NICEST_EXT) &&
(readFb->Visual.samples == 0 || drawFb->Visual.samples > 0)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s(%s: invalid samples)", func,
_mesa_enum_to_string(filter));
return;
}
if (mask & ~legalMaskBits) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(invalid mask bits set)", func);
return;
}
/* depth/stencil must be blitted with nearest filtering */
if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
&& filter != GL_NEAREST) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(depth/stencil requires GL_NEAREST filter)", func);
return;
}
/* get color read/draw renderbuffers */
if (mask & GL_COLOR_BUFFER_BIT) {
const GLuint numColorDrawBuffers = drawFb->_NumColorDrawBuffers;
const struct gl_renderbuffer *colorReadRb = readFb->_ColorReadBuffer;
const struct gl_renderbuffer *colorDrawRb = NULL;
GLuint i;
/* From the EXT_framebuffer_object spec:
*
* "If a buffer is specified in <mask> and does not exist in both
* the read and draw framebuffers, the corresponding bit is silently
* ignored."
*/
if (!colorReadRb || numColorDrawBuffers == 0) {
mask &= ~GL_COLOR_BUFFER_BIT;
}
else {
for (i = 0; i < numColorDrawBuffers; i++) {
colorDrawRb = drawFb->_ColorDrawBuffers[i];
if (!colorDrawRb)
continue;
/* Page 193 (page 205 of the PDF) in section 4.3.2 of the OpenGL
* ES 3.0.1 spec says:
*
* "If the source and destination buffers are identical, an
* INVALID_OPERATION error is generated. Different mipmap
* levels of a texture, different layers of a three-
* dimensional texture or two-dimensional array texture, and
* different faces of a cube map texture do not constitute
* identical buffers."
*/
if (_mesa_is_gles3(ctx) && (colorDrawRb == colorReadRb)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(source and destination color "
"buffer cannot be the same)", func);
return;
}
if (!compatible_color_datatypes(colorReadRb->Format,
colorDrawRb->Format)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(color buffer datatypes mismatch)", func);
return;
}
/* extra checks for multisample copies... */
if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {
/* color formats must match on GLES. This isn't checked on
* desktop GL because the GL 4.4 spec was changed to allow it.
* In the section entitled “Changes in the released
* Specification of July 22, 2013” it says:
*
* “Relax BlitFramebuffer in section 18.3.1 so that format
* conversion can take place during multisample blits, since
* drivers already allow this and some apps depend on it.”
*/
if (_mesa_is_gles(ctx) &&
!compatible_resolve_formats(colorReadRb, colorDrawRb)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(bad src/dst multisample pixel formats)", func);
return;
}
}
}
if (filter != GL_NEAREST) {
/* From EXT_framebuffer_multisample_blit_scaled specification:
* "Calling BlitFramebuffer will result in an INVALID_OPERATION error
* if filter is not NEAREST and read buffer contains integer data."
*/
GLenum type = _mesa_get_format_datatype(colorReadRb->Format);
if (type == GL_INT || type == GL_UNSIGNED_INT) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(integer color type)", func);
return;
}
}
}
}
if (mask & GL_STENCIL_BUFFER_BIT) {
struct gl_renderbuffer *readRb =
readFb->Attachment[BUFFER_STENCIL].Renderbuffer;
struct gl_renderbuffer *drawRb =
drawFb->Attachment[BUFFER_STENCIL].Renderbuffer;
/* From the EXT_framebuffer_object spec:
*
* "If a buffer is specified in <mask> and does not exist in both
* the read and draw framebuffers, the corresponding bit is silently
* ignored."
*/
if ((readRb == NULL) || (drawRb == NULL)) {
mask &= ~GL_STENCIL_BUFFER_BIT;
}
else {
int read_z_bits, draw_z_bits;
if (_mesa_is_gles3(ctx) && (drawRb == readRb)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(source and destination stencil "
"buffer cannot be the same)", func);
return;
}
if (_mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) !=
_mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {
/* There is no need to check the stencil datatype here, because
* there is only one: GL_UNSIGNED_INT.
*/
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(stencil attachment format mismatch)", func);
return;
}
read_z_bits = _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS);
draw_z_bits = _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS);
/* If both buffers also have depth data, the depth formats must match
* as well. If one doesn't have depth, it's not blitted, so we should
* ignore the depth format check.
*/
if (read_z_bits > 0 && draw_z_bits > 0 &&
(read_z_bits != draw_z_bits ||
_mesa_get_format_datatype(readRb->Format) !=
_mesa_get_format_datatype(drawRb->Format))) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(stencil attachment depth format mismatch)", func);
return;
}
}
}
if (mask & GL_DEPTH_BUFFER_BIT) {
struct gl_renderbuffer *readRb =
readFb->Attachment[BUFFER_DEPTH].Renderbuffer;
struct gl_renderbuffer *drawRb =
drawFb->Attachment[BUFFER_DEPTH].Renderbuffer;
/* From the EXT_framebuffer_object spec:
*
* "If a buffer is specified in <mask> and does not exist in both
* the read and draw framebuffers, the corresponding bit is silently
* ignored."
*/
if ((readRb == NULL) || (drawRb == NULL)) {
mask &= ~GL_DEPTH_BUFFER_BIT;
}
else {
int read_s_bit, draw_s_bit;
if (_mesa_is_gles3(ctx) && (drawRb == readRb)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(source and destination depth "
"buffer cannot be the same)", func);
return;
}
if ((_mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) !=
_mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) ||
(_mesa_get_format_datatype(readRb->Format) !=
_mesa_get_format_datatype(drawRb->Format))) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(depth attachment format mismatch)", func);
return;
}
read_s_bit = _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS);
draw_s_bit = _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS);
/* If both buffers also have stencil data, the stencil formats must
* match as well. If one doesn't have stencil, it's not blitted, so
* we should ignore the stencil format check.
*/
if (read_s_bit > 0 && draw_s_bit > 0 && read_s_bit != draw_s_bit) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(depth attachment stencil bits mismatch)", func);
return;
}
}
}
if (_mesa_is_gles3(ctx)) {
/* Page 194 (page 206 of the PDF) in section 4.3.2 of the OpenGL ES
* 3.0.1 spec says:
*
* "If SAMPLE_BUFFERS for the draw framebuffer is greater than zero,
* an INVALID_OPERATION error is generated."
*/
if (drawFb->Visual.samples > 0) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(destination samples must be 0)", func);
return;
}
/* Page 194 (page 206 of the PDF) in section 4.3.2 of the OpenGL ES
* 3.0.1 spec says:
*
* "If SAMPLE_BUFFERS for the read framebuffer is greater than zero,
* no copy is performed and an INVALID_OPERATION error is generated
* if the formats of the read and draw framebuffers are not
* identical or if the source and destination rectangles are not
* defined with the same (X0, Y0) and (X1, Y1) bounds."
*
* The format check was made above because desktop OpenGL has the same
* requirement.
*/
if (readFb->Visual.samples > 0
&& (srcX0 != dstX0 || srcY0 != dstY0
|| srcX1 != dstX1 || srcY1 != dstY1)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(bad src/dst multisample region)", func);
return;
}
} else {
if (readFb->Visual.samples > 0 &&
drawFb->Visual.samples > 0 &&
readFb->Visual.samples != drawFb->Visual.samples) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(mismatched samples)", func);
return;
}
/* extra checks for multisample copies... */
if ((readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) &&
(filter == GL_NEAREST || filter == GL_LINEAR)) {
/* src and dest region sizes must be the same */
if (abs(srcX1 - srcX0) != abs(dstX1 - dstX0) ||
abs(srcY1 - srcY0) != abs(dstY1 - dstY0)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(bad src/dst multisample region sizes)", func);
return;
}
}
}
/* Debug code */
if (DEBUG_BLIT) {
const struct gl_renderbuffer *colorReadRb = readFb->_ColorReadBuffer;
const struct gl_renderbuffer *colorDrawRb = NULL;
GLuint i = 0;
printf("%s(%d, %d, %d, %d, %d, %d, %d, %d,"
" 0x%x, 0x%x)\n", func,
srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1,
mask, filter);
if (colorReadRb) {
const struct gl_renderbuffer_attachment *att;
att = find_attachment(readFb, colorReadRb);
printf(" Src FBO %u RB %u (%dx%d) ",
readFb->Name, colorReadRb->Name,
colorReadRb->Width, colorReadRb->Height);
if (att && att->Texture) {
printf("Tex %u tgt 0x%x level %u face %u",
att->Texture->Name,
att->Texture->Target,
att->TextureLevel,
att->CubeMapFace);
}
printf("\n");
/* Print all active color render buffers */
for (i = 0; i < drawFb->_NumColorDrawBuffers; i++) {
colorDrawRb = drawFb->_ColorDrawBuffers[i];
if (!colorDrawRb)
continue;
att = find_attachment(drawFb, colorDrawRb);
printf(" Dst FBO %u RB %u (%dx%d) ",
drawFb->Name, colorDrawRb->Name,
colorDrawRb->Width, colorDrawRb->Height);
if (att && att->Texture) {
printf("Tex %u tgt 0x%x level %u face %u",
att->Texture->Name,
att->Texture->Target,
att->TextureLevel,
att->CubeMapFace);
}
printf("\n");
}
}
}
if (!mask ||
(srcX1 - srcX0) == 0 || (srcY1 - srcY0) == 0 ||
(dstX1 - dstX0) == 0 || (dstY1 - dstY0) == 0) {
return;
}
assert(ctx->Driver.BlitFramebuffer);
ctx->Driver.BlitFramebuffer(ctx, readFb, drawFb,
srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1,
mask, filter);
}
/**
* Compute derived GL state.
* If __GLcontextRec::NewState is non-zero then this function \b must
* be called before rendering anything.
*
* Calls dd_function_table::UpdateState to perform any internal state
* management necessary.
*
* \sa _mesa_update_modelview_project(), _mesa_update_texture(),
* _mesa_update_buffer_bounds(),
* _mesa_update_lighting() and _mesa_update_tnl_spaces().
*/
void
_mesa_update_state_locked( GLcontext *ctx )
{
GLbitfield new_state = ctx->NewState;
GLbitfield prog_flags = _NEW_PROGRAM;
GLbitfield new_prog_state = 0x0;
if (new_state == _NEW_CURRENT_ATTRIB)
goto out;
if (MESA_VERBOSE & VERBOSE_STATE)
_mesa_print_state("_mesa_update_state", new_state);
/* Determine which state flags effect vertex/fragment program state */
if (ctx->FragmentProgram._MaintainTexEnvProgram) {
prog_flags |= (_NEW_TEXTURE | _NEW_FOG | _DD_NEW_SEPARATE_SPECULAR |
_NEW_ARRAY);
}
if (ctx->VertexProgram._MaintainTnlProgram) {
prog_flags |= (_NEW_ARRAY | _NEW_TEXTURE | _NEW_TEXTURE_MATRIX |
_NEW_TRANSFORM | _NEW_POINT |
_NEW_FOG | _NEW_LIGHT |
_MESA_NEW_NEED_EYE_COORDS);
}
/*
* Now update derived state info
*/
if (new_state & prog_flags)
update_program_enables( ctx );
if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))
_mesa_update_modelview_project( ctx, new_state );
if (new_state & (_NEW_PROGRAM|_NEW_TEXTURE|_NEW_TEXTURE_MATRIX))
_mesa_update_texture( ctx, new_state );
if (new_state & _NEW_BUFFERS)
_mesa_update_framebuffer(ctx);
if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
_mesa_update_draw_buffer_bounds( ctx );
if (new_state & _NEW_POLYGON)
update_polygon( ctx );
if (new_state & _NEW_LIGHT)
_mesa_update_lighting( ctx );
if (new_state & (_NEW_STENCIL | _NEW_BUFFERS))
_mesa_update_stencil( ctx );
#if FEATURE_pixel_transfer
if (new_state & _MESA_NEW_TRANSFER_STATE)
_mesa_update_pixel( ctx, new_state );
#endif
if (new_state & _DD_NEW_SEPARATE_SPECULAR)
update_separate_specular( ctx );
if (new_state & (_NEW_ARRAY | _NEW_PROGRAM | _NEW_BUFFER_OBJECT))
update_arrays( ctx );
if (new_state & (_NEW_BUFFERS | _NEW_VIEWPORT))
update_viewport_matrix(ctx);
if (new_state & _NEW_MULTISAMPLE)
update_multisample( ctx );
if (new_state & _NEW_COLOR)
update_color( ctx );
#if 0
if (new_state & (_NEW_POINT | _NEW_LINE | _NEW_POLYGON | _NEW_LIGHT
| _NEW_STENCIL | _DD_NEW_SEPARATE_SPECULAR))
update_tricaps( ctx, new_state );
#endif
/* ctx->_NeedEyeCoords is now up to date.
*
* If the truth value of this variable has changed, update for the
* new lighting space and recompute the positions of lights and the
* normal transform.
*
* If the lighting space hasn't changed, may still need to recompute
* light positions & normal transforms for other reasons.
*/
if (new_state & _MESA_NEW_NEED_EYE_COORDS)
_mesa_update_tnl_spaces( ctx, new_state );
if (new_state & prog_flags) {
/* When we generate programs from fixed-function vertex/fragment state
* this call may generate/bind a new program. If so, we need to
* propogate the _NEW_PROGRAM flag to the driver.
*/
new_prog_state |= update_program( ctx );
}
out:
new_prog_state |= update_program_constants(ctx);
/*
* Give the driver a chance to act upon the new_state flags.
* The driver might plug in different span functions, for example.
* Also, this is where the driver can invalidate the state of any
* active modules (such as swrast_setup, swrast, tnl, etc).
*
* Set ctx->NewState to zero to avoid recursion if
* Driver.UpdateState() has to call FLUSH_VERTICES(). (fixed?)
*/
new_state = ctx->NewState | new_prog_state;
ctx->NewState = 0;
ctx->Driver.UpdateState(ctx, new_state);
ctx->Array.NewState = 0;
}
/**
* 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;
}
/**
* Compute derived GL state.
* If __struct gl_contextRec::NewState is non-zero then this function \b must
* be called before rendering anything.
*
* Calls dd_function_table::UpdateState to perform any internal state
* management necessary.
*
* \sa _mesa_update_modelview_project(), _mesa_update_texture(),
* _mesa_update_buffer_bounds(),
* _mesa_update_lighting() and _mesa_update_tnl_spaces().
*/
void
_mesa_update_state_locked( struct gl_context *ctx )
{
GLbitfield new_state = ctx->NewState;
GLbitfield new_prog_state = 0x0;
const GLbitfield computed_states = ~(_NEW_CURRENT_ATTRIB | _NEW_LINE);
/* we can skip a bunch of state validation checks if the dirty
* state matches one or more bits in 'computed_states'.
*/
if ((new_state & computed_states) == 0)
goto out;
if (MESA_VERBOSE & VERBOSE_STATE)
_mesa_print_state("_mesa_update_state", new_state);
if (new_state & _NEW_BUFFERS)
_mesa_update_framebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer);
/* Handle Core and Compatibility contexts separately. */
if (ctx->API == API_OPENGL_COMPAT ||
ctx->API == API_OPENGLES) {
GLbitfield prog_flags = _NEW_PROGRAM;
/* Determine which state flags effect vertex/fragment program state */
if (ctx->FragmentProgram._MaintainTexEnvProgram) {
prog_flags |= (_NEW_BUFFERS | _NEW_TEXTURE_OBJECT | _NEW_FOG |
_NEW_VARYING_VP_INPUTS | _NEW_LIGHT | _NEW_POINT |
_NEW_RENDERMODE | _NEW_PROGRAM | _NEW_FRAG_CLAMP |
_NEW_COLOR | _NEW_TEXTURE_STATE);
}
if (ctx->VertexProgram._MaintainTnlProgram) {
prog_flags |= (_NEW_VARYING_VP_INPUTS | _NEW_TEXTURE_OBJECT |
_NEW_TEXTURE_MATRIX | _NEW_TRANSFORM | _NEW_POINT |
_NEW_FOG | _NEW_LIGHT | _NEW_TEXTURE_STATE |
_MESA_NEW_NEED_EYE_COORDS);
}
/*
* Now update derived state info
*/
if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))
_mesa_update_modelview_project( ctx, new_state );
if (new_state & _NEW_TEXTURE_MATRIX)
_mesa_update_texture_matrices(ctx);
if (new_state & (_NEW_TEXTURE_OBJECT | _NEW_TEXTURE_STATE | _NEW_PROGRAM))
_mesa_update_texture_state(ctx);
if (new_state & _NEW_LIGHT)
_mesa_update_lighting(ctx);
if (new_state & _NEW_PIXEL)
_mesa_update_pixel( ctx );
/* ctx->_NeedEyeCoords is now up to date.
*
* If the truth value of this variable has changed, update for the
* new lighting space and recompute the positions of lights and the
* normal transform.
*
* If the lighting space hasn't changed, may still need to recompute
* light positions & normal transforms for other reasons.
*/
if (new_state & _MESA_NEW_NEED_EYE_COORDS)
_mesa_update_tnl_spaces( ctx, new_state );
if (new_state & prog_flags) {
/* When we generate programs from fixed-function vertex/fragment state
* this call may generate/bind a new program. If so, we need to
* propogate the _NEW_PROGRAM flag to the driver.
*/
new_prog_state |= update_program(ctx);
}
} else {
/* GL Core and GLES 2/3 contexts */
if (new_state & (_NEW_TEXTURE_OBJECT | _NEW_PROGRAM))
_mesa_update_texture_state(ctx);
if (new_state & _NEW_PROGRAM)
update_program(ctx);
}
out:
new_prog_state |= update_program_constants(ctx);
ctx->NewState |= new_prog_state;
vbo_exec_invalidate_state(ctx);
/*
* Give the driver a chance to act upon the new_state flags.
* The driver might plug in different span functions, for example.
* Also, this is where the driver can invalidate the state of any
* active modules (such as swrast_setup, swrast, tnl, etc).
*/
ctx->Driver.UpdateState(ctx);
ctx->NewState = 0;
}
/**
* Compute derived GL state.
* If __struct gl_contextRec::NewState is non-zero then this function \b must
* be called before rendering anything.
*
* Calls dd_function_table::UpdateState to perform any internal state
* management necessary.
*
* \sa _mesa_update_modelview_project(), _mesa_update_texture(),
* _mesa_update_buffer_bounds(),
* _mesa_update_lighting() and _mesa_update_tnl_spaces().
*/
void
_mesa_update_state_locked( struct gl_context *ctx )
{
GLbitfield new_state = ctx->NewState;
GLbitfield prog_flags = _NEW_PROGRAM;
GLbitfield new_prog_state = 0x0;
const GLbitfield computed_states = ~(_NEW_CURRENT_ATTRIB | _NEW_LINE);
/* we can skip a bunch of state validation checks if the dirty
* state matches one or more bits in 'computed_states'.
*/
if ((new_state & computed_states) == 0)
goto out;
if (MESA_VERBOSE & VERBOSE_STATE)
_mesa_print_state("_mesa_update_state", new_state);
/* Determine which state flags effect vertex/fragment program state */
if (ctx->FragmentProgram._MaintainTexEnvProgram) {
prog_flags |= (_NEW_BUFFERS | _NEW_TEXTURE | _NEW_FOG |
_NEW_VARYING_VP_INPUTS | _NEW_LIGHT | _NEW_POINT |
_NEW_RENDERMODE | _NEW_PROGRAM | _NEW_FRAG_CLAMP |
_NEW_COLOR);
}
if (ctx->VertexProgram._MaintainTnlProgram) {
prog_flags |= (_NEW_VARYING_VP_INPUTS | _NEW_TEXTURE |
_NEW_TEXTURE_MATRIX | _NEW_TRANSFORM | _NEW_POINT |
_NEW_FOG | _NEW_LIGHT |
_MESA_NEW_NEED_EYE_COORDS);
}
/*
* Now update derived state info
*/
if (new_state & prog_flags)
update_program_enables( ctx );
if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))
_mesa_update_modelview_project( ctx, new_state );
if (new_state & (_NEW_PROGRAM|_NEW_TEXTURE|_NEW_TEXTURE_MATRIX))
_mesa_update_texture( ctx, new_state );
if (new_state & _NEW_POLYGON)
update_frontbit( ctx );
if (new_state & _NEW_BUFFERS)
_mesa_update_framebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer);
if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
_mesa_update_draw_buffer_bounds(ctx, ctx->DrawBuffer);
if (new_state & _NEW_LIGHT)
_mesa_update_lighting( ctx );
if (new_state & (_NEW_LIGHT | _NEW_PROGRAM))
update_twoside( ctx );
if (new_state & (_NEW_STENCIL | _NEW_BUFFERS))
_mesa_update_stencil( ctx );
if (new_state & _NEW_PIXEL)
_mesa_update_pixel( ctx, new_state );
/* ctx->_NeedEyeCoords is now up to date.
*
* If the truth value of this variable has changed, update for the
* new lighting space and recompute the positions of lights and the
* normal transform.
*
* If the lighting space hasn't changed, may still need to recompute
* light positions & normal transforms for other reasons.
*/
if (new_state & _MESA_NEW_NEED_EYE_COORDS)
_mesa_update_tnl_spaces( ctx, new_state );
if (new_state & prog_flags) {
/* When we generate programs from fixed-function vertex/fragment state
* this call may generate/bind a new program. If so, we need to
* propogate the _NEW_PROGRAM flag to the driver.
*/
new_prog_state |= update_program( ctx );
}
if (new_state & _NEW_ARRAY)
_mesa_update_vao_client_arrays(ctx, ctx->Array.VAO);
out:
new_prog_state |= update_program_constants(ctx);
/*
* Give the driver a chance to act upon the new_state flags.
* The driver might plug in different span functions, for example.
* Also, this is where the driver can invalidate the state of any
* active modules (such as swrast_setup, swrast, tnl, etc).
*
* Set ctx->NewState to zero to avoid recursion if
* Driver.UpdateState() has to call FLUSH_VERTICES(). (fixed?)
*/
new_state = ctx->NewState | new_prog_state;
ctx->NewState = 0;
ctx->Driver.UpdateState(ctx, new_state);
ctx->Array.VAO->NewArrays = 0x0;
}
