Assert ctx->Driver.NewTransformFeedback if the feature is enabled; Use
the default callbacks otherwise. The rest of core mesa expects the
state to be initialized.
Driver loading is now splitted into two stages. In the first stage, an
_EGLModule is created for each driver: user driver, default drivers, and
all files in the search directories that start with "egl_". Modules are
not loaded at this stage.
In the second stage, each module is loaded to initialize a display. The
process stops at the first module that can initialize the display.
If eglGetProcAddress is called before eglInitialize, the same code path
will be taken to find the first module that supports
EGL_DEFAULT_DISPLAY. Because we do not want to initialize the display,
drv->Probe is used instead in this case.
Check FEATURE_GL in _mesa_init_shader_dispatch and
_mesa_init_shader_uniform_dispatch. OpenGL ES can not and does not use
_mesa_init_<...>_dispatch. This is supposed to be temporary. Ideally,
a more flexible way for initializing dispatch tables should be
developed.
This also allows us to split the loop emulation into two phases. A
tranformation phase which either unrolls loops or prepares them to be
emulated, and the emulation phase which unrolls remaining loops until the
instruction limit is reached. The second phase is completed after the
deadcode analysis in order to get a more accurate count of the number of
instructions in the body of loops.
These 3 fields are per shader-program. Copy them into the geometry
program at link time for convenient access later.
Also, add some missing glGetProgramiv() queries.
Before, if there were no color buffers enabled (with glDrawBuffers(GL_NONE))
when the texenv program was generated, we'd emit writes to OUTPUT[1] but
the OutputsWritten mask was 0. This inconsistency caused an assertion to
fail later in the Mesa->TGSI translation.
Fixes fd.o bug 28169
NOTE: this is a candidate for the 7.8 branch (and depends on commit
b6b9b17d27).
Need to pass the index indicating which blend terms to use, not which
color buffer we're blending into.
Rename the parameter to blend_quad() and add comments to be more clear
about this.
