void GLAPIENTRY
_mesa_GetTexLevelParameteriv( GLenum target, GLint level,
GLenum pname, GLint *params )
{
struct gl_texture_object *texObj;
const struct gl_texture_image *img = NULL;
GLint maxLevels;
gl_format texFormat;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
/* this will catch bad target values */
maxLevels = _mesa_max_texture_levels(ctx, target);
if (maxLevels == 0) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetTexLevelParameter[if]v(target=0x%x)", target);
return;
}
if (level < 0 || level >= maxLevels) {
_mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
return;
}
texObj = _mesa_select_tex_object(ctx, target);
img = _mesa_select_tex_image(ctx, texObj, target, level);
if (!img || img->TexFormat == MESA_FORMAT_NONE) {
/* undefined texture image */
if (pname == GL_TEXTURE_COMPONENTS)
*params = 1;
else
*params = 0;
return;
}
texFormat = img->TexFormat;
switch (pname) {
case GL_TEXTURE_WIDTH:
*params = img->Width;
break;
case GL_TEXTURE_HEIGHT:
*params = img->Height;
break;
case GL_TEXTURE_DEPTH:
*params = img->Depth;
break;
case GL_TEXTURE_INTERNAL_FORMAT:
*params = img->InternalFormat;
break;
case GL_TEXTURE_BORDER:
*params = img->Border;
break;
case GL_TEXTURE_RED_SIZE:
case GL_TEXTURE_GREEN_SIZE:
case GL_TEXTURE_BLUE_SIZE:
case GL_TEXTURE_ALPHA_SIZE:
if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
*params = _mesa_get_format_bits(texFormat, pname);
else
*params = 0;
break;
case GL_TEXTURE_INTENSITY_SIZE:
case GL_TEXTURE_LUMINANCE_SIZE:
if (_mesa_base_format_has_channel(img->_BaseFormat, pname)) {
*params = _mesa_get_format_bits(texFormat, pname);
if (*params == 0) {
/* intensity or luminance is probably stored as RGB[A] */
*params = MIN2(_mesa_get_format_bits(texFormat,
GL_TEXTURE_RED_SIZE),
_mesa_get_format_bits(texFormat,
GL_TEXTURE_GREEN_SIZE));
}
}
else {
*params = 0;
}
break;
/* GL_ARB_texture_float */
case GL_TEXTURE_RED_TYPE_ARB:
case GL_TEXTURE_GREEN_TYPE_ARB:
case GL_TEXTURE_BLUE_TYPE_ARB:
case GL_TEXTURE_ALPHA_TYPE_ARB:
case GL_TEXTURE_LUMINANCE_TYPE_ARB:
case GL_TEXTURE_INTENSITY_TYPE_ARB:
case GL_TEXTURE_DEPTH_TYPE_ARB:
if (!ctx->Extensions.ARB_texture_float)
goto invalid_pname;
if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
*params = _mesa_get_format_datatype(texFormat);
else
*params = GL_NONE;
break;
default:
goto invalid_pname;
}
/* no error if we get here */
return;
invalid_pname:
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetTexLevelParameter[if]v(pname=%s)",
_mesa_lookup_enum_by_nr(pname));
}
static void
gen6_upload_blend_state(struct brw_context *brw)
{
bool is_buffer_zero_integer_format = false;
struct gl_context *ctx = &brw->ctx;
struct gen6_blend_state *blend;
int b;
int nr_draw_buffers = ctx->DrawBuffer->_NumColorDrawBuffers;
int size;
/* We need at least one BLEND_STATE written, because we might do
* thread dispatch even if _NumColorDrawBuffers is 0 (for example
* for computed depth or alpha test), which will do an FB write
* with render target 0, which will reference BLEND_STATE[0] for
* alpha test enable.
*/
if (nr_draw_buffers == 0)
nr_draw_buffers = 1;
size = sizeof(*blend) * nr_draw_buffers;
blend = brw_state_batch(brw, AUB_TRACE_BLEND_STATE,
size, 64, &brw->cc.blend_state_offset);
memset(blend, 0, size);
for (b = 0; b < nr_draw_buffers; b++) {
/* _NEW_BUFFERS */
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[b];
GLenum rb_type;
bool integer;
if (rb)
rb_type = _mesa_get_format_datatype(rb->Format);
else
rb_type = GL_UNSIGNED_NORMALIZED;
/* Used for implementing the following bit of GL_EXT_texture_integer:
* "Per-fragment operations that require floating-point color
* components, including multisample alpha operations, alpha test,
* blending, and dithering, have no effect when the corresponding
* colors are written to an integer color buffer."
*/
integer = (rb_type == GL_INT || rb_type == GL_UNSIGNED_INT);
if(b == 0 && integer)
is_buffer_zero_integer_format = true;
/* _NEW_COLOR */
if (ctx->Color.ColorLogicOpEnabled) {
/* Floating point RTs should have no effect from LogicOp,
* except for disabling of blending, but other types should.
*
* However, from the Sandy Bridge PRM, Vol 2 Par 1, Section 8.1.11,
* "Logic Ops",
*
* "Logic Ops are only supported on *_UNORM surfaces (excluding
* _SRGB variants), otherwise Logic Ops must be DISABLED."
*/
WARN_ONCE(ctx->Color.LogicOp != GL_COPY &&
rb_type != GL_UNSIGNED_NORMALIZED &&
rb_type != GL_FLOAT, "Ignoring %s logic op on %s "
"renderbuffer\n",
_mesa_enum_to_string(ctx->Color.LogicOp),
_mesa_enum_to_string(rb_type));
if (rb_type == GL_UNSIGNED_NORMALIZED) {
blend[b].blend1.logic_op_enable = 1;
blend[b].blend1.logic_op_func =
intel_translate_logic_op(ctx->Color.LogicOp);
}
} else if (ctx->Color.BlendEnabled & (1 << b) && !integer) {
GLenum eqRGB = ctx->Color.Blend[b].EquationRGB;
GLenum eqA = ctx->Color.Blend[b].EquationA;
GLenum srcRGB = ctx->Color.Blend[b].SrcRGB;
GLenum dstRGB = ctx->Color.Blend[b].DstRGB;
GLenum srcA = ctx->Color.Blend[b].SrcA;
GLenum dstA = ctx->Color.Blend[b].DstA;
if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
srcRGB = dstRGB = GL_ONE;
}
if (eqA == GL_MIN || eqA == GL_MAX) {
srcA = dstA = GL_ONE;
}
/* Due to hardware limitations, the destination may have information
* in an alpha channel even when the format specifies no alpha
* channel. In order to avoid getting any incorrect blending due to
* that alpha channel, coerce the blend factors to values that will
* not read the alpha channel, but will instead use the correct
* implicit value for alpha.
*/
if (rb && !_mesa_base_format_has_channel(rb->_BaseFormat, GL_TEXTURE_ALPHA_TYPE))
{
srcRGB = brw_fix_xRGB_alpha(srcRGB);
srcA = brw_fix_xRGB_alpha(srcA);
dstRGB = brw_fix_xRGB_alpha(dstRGB);
dstA = brw_fix_xRGB_alpha(dstA);
}
blend[b].blend0.dest_blend_factor = brw_translate_blend_factor(dstRGB);
blend[b].blend0.source_blend_factor = brw_translate_blend_factor(srcRGB);
blend[b].blend0.blend_func = brw_translate_blend_equation(eqRGB);
blend[b].blend0.ia_dest_blend_factor = brw_translate_blend_factor(dstA);
blend[b].blend0.ia_source_blend_factor = brw_translate_blend_factor(srcA);
blend[b].blend0.ia_blend_func = brw_translate_blend_equation(eqA);
blend[b].blend0.blend_enable = 1;
blend[b].blend0.ia_blend_enable = (srcA != srcRGB ||
dstA != dstRGB ||
eqA != eqRGB);
}
/* See section 8.1.6 "Pre-Blend Color Clamping" of the
* SandyBridge PRM Volume 2 Part 1 for HW requirements.
*
* We do our ARB_color_buffer_float CLAMP_FRAGMENT_COLOR
* clamping in the fragment shader. For its clamping of
* blending, the spec says:
*
* "RESOLVED: For fixed-point color buffers, the inputs and
* the result of the blending equation are clamped. For
* floating-point color buffers, no clamping occurs."
*
* So, generally, we want clamping to the render target's range.
* And, good news, the hardware tables for both pre- and
* post-blend color clamping are either ignored, or any are
* allowed, or clamping is required but RT range clamping is a
* valid option.
*/
blend[b].blend1.pre_blend_clamp_enable = 1;
blend[b].blend1.post_blend_clamp_enable = 1;
blend[b].blend1.clamp_range = BRW_RENDERTARGET_CLAMPRANGE_FORMAT;
/* _NEW_COLOR */
if (ctx->Color.AlphaEnabled && !integer) {
blend[b].blend1.alpha_test_enable = 1;
blend[b].blend1.alpha_test_func =
intel_translate_compare_func(ctx->Color.AlphaFunc);
}
/* _NEW_COLOR */
if (ctx->Color.DitherFlag && !integer) {
blend[b].blend1.dither_enable = 1;
blend[b].blend1.y_dither_offset = 0;
blend[b].blend1.x_dither_offset = 0;
}
blend[b].blend1.write_disable_r = !ctx->Color.ColorMask[b][0];
blend[b].blend1.write_disable_g = !ctx->Color.ColorMask[b][1];
blend[b].blend1.write_disable_b = !ctx->Color.ColorMask[b][2];
blend[b].blend1.write_disable_a = !ctx->Color.ColorMask[b][3];
/* OpenGL specification 3.3 (page 196), section 4.1.3 says:
* "If drawbuffer zero is not NONE and the buffer it references has an
* integer format, the SAMPLE_ALPHA_TO_COVERAGE and SAMPLE_ALPHA_TO_ONE
* operations are skipped."
*/
if(!is_buffer_zero_integer_format) {
/* _NEW_MULTISAMPLE */
blend[b].blend1.alpha_to_coverage =
_mesa_is_multisample_enabled(ctx) && ctx->Multisample.SampleAlphaToCoverage;
/* From SandyBridge PRM, volume 2 Part 1, section 8.2.3, BLEND_STATE:
* DWord 1, Bit 30 (AlphaToOne Enable):
* "If Dual Source Blending is enabled, this bit must be disabled"
*/
WARN_ONCE(ctx->Color.Blend[b]._UsesDualSrc &&
_mesa_is_multisample_enabled(ctx) &&
ctx->Multisample.SampleAlphaToOne,
"HW workaround: disabling alpha to one with dual src "
"blending\n");
if (ctx->Color.Blend[b]._UsesDualSrc)
blend[b].blend1.alpha_to_one = false;
else
blend[b].blend1.alpha_to_one =
_mesa_is_multisample_enabled(ctx) && ctx->Multisample.SampleAlphaToOne;
blend[b].blend1.alpha_to_coverage_dither = (brw->gen >= 7);
}
else {
blend[b].blend1.alpha_to_coverage = false;
blend[b].blend1.alpha_to_one = false;
}
}
/* Point the GPU at the new indirect state. */
if (brw->gen == 6) {
BEGIN_BATCH(4);
OUT_BATCH(_3DSTATE_CC_STATE_POINTERS << 16 | (4 - 2));
OUT_BATCH(brw->cc.blend_state_offset | 1);
OUT_BATCH(0);
OUT_BATCH(0);
ADVANCE_BATCH();
} else {
BEGIN_BATCH(2);
OUT_BATCH(_3DSTATE_BLEND_STATE_POINTERS << 16 | (2 - 2));
OUT_BATCH(brw->cc.blend_state_offset | 1);
ADVANCE_BATCH();
}
}
void GLAPIENTRY
_mesa_GetInternalformativ(GLenum target, GLenum internalformat, GLenum pname,
GLsizei bufSize, GLint *params)
{
GLint buffer[16];
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
/* ARB_internalformat_query is also mandatory for ARB_internalformat_query2 */
if (!(_mesa_has_ARB_internalformat_query(ctx) ||
_mesa_is_gles3(ctx))) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetInternalformativ");
return;
}
assert(ctx->Driver.QueryInternalFormat != NULL);
if (!_legal_parameters(ctx, target, internalformat, pname, bufSize, params))
return;
/* initialize the contents of the temporary buffer */
memcpy(buffer, params, MIN2(bufSize, 16) * sizeof(GLint));
/* Use the 'unsupported' response defined by the spec for every pname
* as the default answer.
*/
_set_default_response(pname, buffer);
if (!_is_target_supported(ctx, target) ||
!_is_internalformat_supported(ctx, target, internalformat) ||
!_is_resource_supported(ctx, target, internalformat, pname))
goto end;
switch (pname) {
case GL_SAMPLES:
/* fall-through */
case GL_NUM_SAMPLE_COUNTS:
/* The ARB_internalformat_query2 sets the response as 'unsupported' for
* SAMPLES and NUM_SAMPLE_COUNTS:
*
* "If <internalformat> is not color-renderable, depth-renderable, or
* stencil-renderable (as defined in section 4.4.4), or if <target>
* does not support multiple samples (ie other than
* TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_MULTISAMPLE_ARRAY,
* or RENDERBUFFER)."
*/
if ((target != GL_RENDERBUFFER &&
target != GL_TEXTURE_2D_MULTISAMPLE &&
target != GL_TEXTURE_2D_MULTISAMPLE_ARRAY) ||
!_is_renderable(ctx, internalformat))
goto end;
/* The GL ES 3.0 specification, section 6.1.15 page 236 says:
*
* "Since multisampling is not supported for signed and unsigned
* integer internal formats, the value of NUM_SAMPLE_COUNTS will be
* zero for such formats.
*
* Since OpenGL ES 3.1 adds support for multisampled integer formats, we
* have to check the version for 30 exactly.
*/
if (pname == GL_NUM_SAMPLE_COUNTS && ctx->API == API_OPENGLES2 &&
ctx->Version == 30 && _mesa_is_enum_format_integer(internalformat)) {
goto end;
}
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_INTERNALFORMAT_SUPPORTED:
/* Having a supported <internalformat> is implemented as a prerequisite
* for all the <pnames>. Thus, if we reach this point, the internalformat is
* supported.
*/
buffer[0] = GL_TRUE;
break;
case GL_INTERNALFORMAT_PREFERRED:
/* The ARB_internalformat_query2 spec says:
*
* "- INTERNALFORMAT_PREFERRED: The implementation-preferred internal
* format for representing resources of the specified <internalformat> is
* returned in <params>.
*
* Therefore, we let the driver answer. Note that if we reach this
* point, it means that the internalformat is supported, so the driver
* is called just to try to get a preferred format. If not supported,
* GL_NONE was already returned and the driver is not called.
*/
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_INTERNALFORMAT_RED_SIZE:
case GL_INTERNALFORMAT_GREEN_SIZE:
case GL_INTERNALFORMAT_BLUE_SIZE:
case GL_INTERNALFORMAT_ALPHA_SIZE:
case GL_INTERNALFORMAT_DEPTH_SIZE:
case GL_INTERNALFORMAT_STENCIL_SIZE:
case GL_INTERNALFORMAT_SHARED_SIZE:
case GL_INTERNALFORMAT_RED_TYPE:
case GL_INTERNALFORMAT_GREEN_TYPE:
case GL_INTERNALFORMAT_BLUE_TYPE:
case GL_INTERNALFORMAT_ALPHA_TYPE:
case GL_INTERNALFORMAT_DEPTH_TYPE:
case GL_INTERNALFORMAT_STENCIL_TYPE: {
GLint baseformat;
mesa_format texformat;
if (target != GL_RENDERBUFFER) {
if (!_mesa_legal_get_tex_level_parameter_target(ctx, target, true))
goto end;
baseformat = _mesa_base_tex_format(ctx, internalformat);
} else {
baseformat = _mesa_base_fbo_format(ctx, internalformat);
}
/* Let the driver choose the texture format.
*
* Disclaimer: I am considering that drivers use for renderbuffers the
* same format-choice logic as for textures.
*/
texformat = ctx->Driver.ChooseTextureFormat(ctx, target, internalformat,
GL_NONE /*format */, GL_NONE /* type */);
if (texformat == MESA_FORMAT_NONE || baseformat <= 0)
goto end;
/* Implementation based on what Mesa does for glGetTexLevelParameteriv
* and glGetRenderbufferParameteriv functions.
*/
if (pname == GL_INTERNALFORMAT_SHARED_SIZE) {
if (_mesa_has_EXT_texture_shared_exponent(ctx) &&
target != GL_TEXTURE_BUFFER &&
target != GL_RENDERBUFFER &&
texformat == MESA_FORMAT_R9G9B9E5_FLOAT) {
buffer[0] = 5;
}
goto end;
}
if (!_mesa_base_format_has_channel(baseformat, pname))
goto end;
switch (pname) {
case GL_INTERNALFORMAT_DEPTH_SIZE:
if (ctx->API != API_OPENGL_CORE &&
!_mesa_has_ARB_depth_texture(ctx) &&
target != GL_RENDERBUFFER &&
target != GL_TEXTURE_BUFFER)
goto end;
/* fallthrough */
case GL_INTERNALFORMAT_RED_SIZE:
case GL_INTERNALFORMAT_GREEN_SIZE:
case GL_INTERNALFORMAT_BLUE_SIZE:
case GL_INTERNALFORMAT_ALPHA_SIZE:
case GL_INTERNALFORMAT_STENCIL_SIZE:
buffer[0] = _mesa_get_format_bits(texformat, pname);
break;
case GL_INTERNALFORMAT_DEPTH_TYPE:
if (!_mesa_has_ARB_texture_float(ctx))
goto end;
/* fallthrough */
case GL_INTERNALFORMAT_RED_TYPE:
case GL_INTERNALFORMAT_GREEN_TYPE:
case GL_INTERNALFORMAT_BLUE_TYPE:
case GL_INTERNALFORMAT_ALPHA_TYPE:
case GL_INTERNALFORMAT_STENCIL_TYPE:
buffer[0] = _mesa_get_format_datatype(texformat);
break;
default:
break;
}
break;
}
/* For WIDTH/HEIGHT/DEPTH/LAYERS there is no reason to think that the
* returned values should be different to the values returned by
* GetInteger with MAX_TEXTURE_SIZE, MAX_3D_TEXTURE_SIZE, etc.*/
case GL_MAX_WIDTH:
case GL_MAX_HEIGHT:
case GL_MAX_DEPTH: {
GLenum get_pname;
GLint dimensions;
GLint min_dimensions;
/* From query2:MAX_HEIGHT spec (as example):
*
* "If the resource does not have at least two dimensions, or if the
* resource is unsupported, zero is returned."
*/
dimensions = _get_target_dimensions(target);
min_dimensions = _get_min_dimensions(pname);
if (dimensions < min_dimensions)
goto end;
get_pname = _equivalent_size_pname(target, pname);
if (get_pname == 0)
goto end;
_mesa_GetIntegerv(get_pname, buffer);
break;
}
case GL_MAX_LAYERS:
if (!_mesa_has_EXT_texture_array(ctx))
goto end;
if (!_mesa_is_array_texture(target))
goto end;
_mesa_GetIntegerv(GL_MAX_ARRAY_TEXTURE_LAYERS, buffer);
break;
case GL_MAX_COMBINED_DIMENSIONS:{
GLint64 combined_value = 1;
GLenum max_dimensions_pnames[] = {
GL_MAX_WIDTH,
GL_MAX_HEIGHT,
GL_MAX_DEPTH,
GL_SAMPLES
};
unsigned i;
GLint current_value;
/* Combining the dimensions. Note that for array targets, this would
* automatically include the value of MAX_LAYERS, as that value is
* returned as MAX_HEIGHT or MAX_DEPTH */
for (i = 0; i < 4; i++) {
if (max_dimensions_pnames[i] == GL_SAMPLES &&
!_is_multisample_target(target))
continue;
_mesa_GetInternalformativ(target, internalformat,
max_dimensions_pnames[i],
1, ¤t_value);
if (current_value != 0)
combined_value *= current_value;
}
if (_mesa_is_cube_map_texture(target))
combined_value *= 6;
/* We pack the 64-bit value on two 32-bit values. Calling the 32-bit
* query, this would work as far as the value can be hold on a 32-bit
* signed integer. For the 64-bit query, the wrapper around the 32-bit
* query will unpack the value */
memcpy(buffer, &combined_value, sizeof(GLint64));
break;
}
case GL_COLOR_COMPONENTS:
/* The ARB_internalformat_query2 spec says:
*
* "- COLOR_COMPONENTS: If the internal format contains any color
* components (R, G, B, or A), TRUE is returned in <params>.
* If the internal format is unsupported or contains no color
* components, FALSE is returned."
*/
if (_mesa_is_color_format(internalformat))
buffer[0] = GL_TRUE;
break;
case GL_DEPTH_COMPONENTS:
/* The ARB_internalformat_query2 spec says:
*
* "- DEPTH_COMPONENTS: If the internal format contains a depth
* component (D), TRUE is returned in <params>. If the internal format
* is unsupported or contains no depth component, FALSE is returned."
*/
if (_mesa_is_depth_format(internalformat) ||
_mesa_is_depthstencil_format(internalformat))
buffer[0] = GL_TRUE;
break;
case GL_STENCIL_COMPONENTS:
/* The ARB_internalformat_query2 spec says:
*
* "- STENCIL_COMPONENTS: If the internal format contains a stencil
* component (S), TRUE is returned in <params>. If the internal format
* is unsupported or contains no stencil component, FALSE is returned.
*/
if (_mesa_is_stencil_format(internalformat) ||
_mesa_is_depthstencil_format(internalformat))
buffer[0] = GL_TRUE;
break;
case GL_COLOR_RENDERABLE:
case GL_DEPTH_RENDERABLE:
case GL_STENCIL_RENDERABLE:
if (!_is_renderable(ctx, internalformat))
goto end;
if (pname == GL_COLOR_RENDERABLE) {
if (!_mesa_is_color_format(internalformat))
goto end;
} else {
GLenum baseFormat = _mesa_base_fbo_format(ctx, internalformat);
if (baseFormat != GL_DEPTH_STENCIL &&
((pname == GL_DEPTH_RENDERABLE && baseFormat != GL_DEPTH_COMPONENT) ||
(pname == GL_STENCIL_RENDERABLE && baseFormat != GL_STENCIL_INDEX)))
goto end;
}
buffer[0] = GL_TRUE;
break;
case GL_FRAMEBUFFER_RENDERABLE_LAYERED:
if (!_mesa_has_EXT_texture_array(ctx) ||
_legal_target_for_framebuffer_texture_layer(ctx, target))
goto end;
/* fallthrough */
case GL_FRAMEBUFFER_RENDERABLE:
case GL_FRAMEBUFFER_BLEND:
if (!_mesa_has_ARB_framebuffer_object(ctx))
goto end;
if (target == GL_TEXTURE_BUFFER ||
!_is_renderable(ctx, internalformat))
goto end;
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_READ_PIXELS:
case GL_READ_PIXELS_FORMAT:
case GL_READ_PIXELS_TYPE:
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_TEXTURE_IMAGE_FORMAT:
case GL_GET_TEXTURE_IMAGE_FORMAT:
case GL_TEXTURE_IMAGE_TYPE:
case GL_GET_TEXTURE_IMAGE_TYPE:
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_MIPMAP:
case GL_MANUAL_GENERATE_MIPMAP:
case GL_AUTO_GENERATE_MIPMAP:
if (!_mesa_is_valid_generate_texture_mipmap_target(ctx, target) ||
!_mesa_is_valid_generate_texture_mipmap_internalformat(ctx,
internalformat)) {
goto end;
}
if (pname == GL_MIPMAP) {
buffer[0] = GL_TRUE;
goto end;
}
else if (pname == GL_MANUAL_GENERATE_MIPMAP) {
if (!_mesa_has_ARB_framebuffer_object(ctx))
goto end;
}
else {
/* From ARB_internalformat_query2:
* "Dependencies on OpenGL 3.2 (Core Profile)
* In core profiles for OpenGL 3.2 and later versions, queries
* for the AUTO_GENERATE_MIPMAP <pname> return the appropriate
* unsupported response."
*/
if (_mesa_is_desktop_gl(ctx) && ctx->Version >= 32)
goto end;
}
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_COLOR_ENCODING:
if (!_mesa_is_color_format(internalformat))
goto end;
if (_mesa_is_srgb_format(internalformat))
buffer[0] = GL_SRGB;
else
buffer[0] = GL_LINEAR;
break;
case GL_SRGB_READ:
if (!_mesa_has_EXT_texture_sRGB(ctx) ||
!_mesa_is_srgb_format(internalformat)) {
goto end;
}
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_SRGB_WRITE:
if (!_mesa_has_EXT_framebuffer_sRGB(ctx) ||
!_mesa_is_color_format(internalformat)) {
goto end;
}
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_SRGB_DECODE_ARB:
/* Presence of EXT_texture_sRGB_decode was already verified */
if (!_mesa_has_EXT_texture_sRGB(ctx) ||
target == GL_RENDERBUFFER ||
!_mesa_is_srgb_format(internalformat)) {
goto end;
}
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_FILTER:
/* If it doesn't allow to set sampler parameters then it would not allow
* to set a filter different to GL_NEAREST. In practice, this method
* only filters out MULTISAMPLE/MULTISAMPLE_ARRAY */
if (!_mesa_target_allows_setting_sampler_parameters(target))
goto end;
if (_mesa_is_enum_format_integer(internalformat))
goto end;
if (target == GL_TEXTURE_BUFFER)
goto end;
/* At this point we know that multi-texel filtering is supported. We
* need to call the driver to know if it is CAVEAT_SUPPORT or
* FULL_SUPPORT.
*/
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_VERTEX_TEXTURE:
case GL_TESS_CONTROL_TEXTURE:
case GL_TESS_EVALUATION_TEXTURE:
case GL_GEOMETRY_TEXTURE:
case GL_FRAGMENT_TEXTURE:
case GL_COMPUTE_TEXTURE:
if (target == GL_RENDERBUFFER)
goto end;
if ((pname == GL_TESS_CONTROL_TEXTURE ||
pname == GL_TESS_EVALUATION_TEXTURE) &&
!_mesa_has_tessellation(ctx))
goto end;
if (pname == GL_GEOMETRY_TEXTURE && !_mesa_has_geometry_shaders(ctx))
goto end;
if (pname == GL_COMPUTE_TEXTURE && !_mesa_has_compute_shaders(ctx))
goto end;
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_TEXTURE_GATHER:
case GL_TEXTURE_GATHER_SHADOW:
if (!_mesa_has_ARB_texture_gather(ctx))
goto end;
/* fallthrough */
case GL_TEXTURE_SHADOW:
/* Only depth or depth-stencil image formats make sense in shadow
samplers */
if (pname != GL_TEXTURE_GATHER &&
!_mesa_is_depth_format(internalformat) &&
!_mesa_is_depthstencil_format(internalformat))
goto end;
/* Validate the target for shadow and gather operations */
switch (target) {
case GL_TEXTURE_2D:
case GL_TEXTURE_2D_ARRAY:
case GL_TEXTURE_CUBE_MAP:
case GL_TEXTURE_CUBE_MAP_ARRAY:
case GL_TEXTURE_RECTANGLE:
break;
case GL_TEXTURE_1D:
case GL_TEXTURE_1D_ARRAY:
/* 1D and 1DArray textures are not admitted in gather operations */
if (pname != GL_TEXTURE_SHADOW)
goto end;
break;
default:
goto end;
}
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_SHADER_IMAGE_LOAD:
case GL_SHADER_IMAGE_STORE:
if (!_mesa_has_ARB_shader_image_load_store(ctx))
goto end;
/* We call to _mesa_is_shader_image_format_supported
* using "internalformat" as parameter, because the
* the ARB_internalformat_query2 spec says:
* "In this case the <internalformat> is the value of the <format>
* parameter that is passed to BindImageTexture."
*/
if (target == GL_RENDERBUFFER ||
!_mesa_is_shader_image_format_supported(ctx, internalformat))
goto end;
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_SHADER_IMAGE_ATOMIC:
if (!_mesa_has_ARB_shader_image_load_store(ctx))
goto end;
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_IMAGE_TEXEL_SIZE: {
mesa_format image_format;
if (!_mesa_has_ARB_shader_image_load_store(ctx) ||
target == GL_RENDERBUFFER)
goto end;
image_format = _mesa_get_shader_image_format(internalformat);
if (image_format == MESA_FORMAT_NONE)
goto end;
/* We return bits */
buffer[0] = (_mesa_get_format_bytes(image_format) * 8);
break;
}
case GL_IMAGE_COMPATIBILITY_CLASS:
if (!_mesa_has_ARB_shader_image_load_store(ctx) ||
target == GL_RENDERBUFFER)
goto end;
buffer[0] = _mesa_get_image_format_class(internalformat);
break;
case GL_IMAGE_PIXEL_FORMAT: {
GLint base_format;
if (!_mesa_has_ARB_shader_image_load_store(ctx) ||
target == GL_RENDERBUFFER ||
!_mesa_is_shader_image_format_supported(ctx, internalformat))
goto end;
base_format = _mesa_base_tex_format(ctx, internalformat);
if (base_format == -1)
goto end;
if (_mesa_is_enum_format_integer(internalformat))
buffer[0] = _mesa_base_format_to_integer_format(base_format);
else
buffer[0] = base_format;
break;
}
case GL_IMAGE_PIXEL_TYPE: {
mesa_format image_format;
GLenum datatype;
GLuint comps;
if (!_mesa_has_ARB_shader_image_load_store(ctx) ||
target == GL_RENDERBUFFER)
goto end;
image_format = _mesa_get_shader_image_format(internalformat);
if (image_format == MESA_FORMAT_NONE)
goto end;
_mesa_uncompressed_format_to_type_and_comps(image_format, &datatype,
&comps);
if (!datatype)
goto end;
buffer[0] = datatype;
break;
}
case GL_IMAGE_FORMAT_COMPATIBILITY_TYPE: {
if (!_mesa_has_ARB_shader_image_load_store(ctx))
goto end;
if (!_mesa_legal_get_tex_level_parameter_target(ctx, target, true))
goto end;
/* From spec: "Equivalent to calling GetTexParameter with <value> set
* to IMAGE_FORMAT_COMPATIBILITY_TYPE."
*
* GetTexParameter just returns
* tex_obj->ImageFormatCompatibilityType. We create a fake tex_obj
* just with the purpose of getting the value.
*/
struct gl_texture_object *tex_obj = _mesa_new_texture_object(ctx, 0, target);
buffer[0] = tex_obj->ImageFormatCompatibilityType;
_mesa_delete_texture_object(ctx, tex_obj);
break;
}
case GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_TEST:
case GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_TEST:
case GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_WRITE:
case GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_WRITE:
if (target == GL_RENDERBUFFER)
goto end;
if (!_mesa_is_depthstencil_format(internalformat)) {
if (((pname == GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_TEST ||
pname == GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_WRITE) &&
!_mesa_is_depth_format(internalformat)) ||
((pname == GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_TEST ||
pname == GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_WRITE) &&
!_mesa_is_stencil_format(internalformat)))
goto end;
}
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_TEXTURE_COMPRESSED:
buffer[0] = _mesa_is_compressed_format(ctx, internalformat);
break;
case GL_TEXTURE_COMPRESSED_BLOCK_WIDTH:
case GL_TEXTURE_COMPRESSED_BLOCK_HEIGHT:
case GL_TEXTURE_COMPRESSED_BLOCK_SIZE: {
mesa_format mesaformat;
GLint block_size;
mesaformat = _mesa_glenum_to_compressed_format(internalformat);
if (mesaformat == MESA_FORMAT_NONE)
goto end;
block_size = _mesa_get_format_bytes(mesaformat);
assert(block_size > 0);
if (pname == GL_TEXTURE_COMPRESSED_BLOCK_SIZE) {
buffer[0] = block_size;
} else {
GLuint bwidth, bheight;
/* Returns the width and height in pixels. We return bytes */
_mesa_get_format_block_size(mesaformat, &bwidth, &bheight);
assert(bwidth > 0 && bheight > 0);
if (pname == GL_TEXTURE_COMPRESSED_BLOCK_WIDTH)
buffer[0] = block_size / bheight;
else
buffer[0] = block_size / bwidth;
}
break;
}
case GL_CLEAR_BUFFER:
if (target != GL_TEXTURE_BUFFER)
goto end;
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
break;
case GL_TEXTURE_VIEW:
case GL_VIEW_COMPATIBILITY_CLASS:
if (!_mesa_has_ARB_texture_view(ctx) ||
target == GL_TEXTURE_BUFFER ||
target == GL_RENDERBUFFER)
goto end;
if (pname == GL_TEXTURE_VIEW) {
ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
buffer);
} else {
GLenum view_class = _mesa_texture_view_lookup_view_class(ctx,
internalformat);
if (view_class == GL_FALSE)
goto end;
buffer[0] = view_class;
}
break;
default:
unreachable("bad param");
}
end:
if (bufSize != 0 && params == NULL) {
/* Emit a warning to aid application debugging, but go ahead and do the
* memcpy (and probably crash) anyway.
*/
_mesa_warning(ctx,
"glGetInternalformativ(bufSize = %d, but params = NULL)",
bufSize);
}
/* Copy the data from the temporary buffer to the buffer supplied by the
* application. Clamp the size of the copy to the size supplied by the
* application.
*/
memcpy(params, buffer, MIN2(bufSize, 16) * sizeof(GLint));
return;
}
void GLAPIENTRY
_mesa_GetTexLevelParameteriv( GLenum target, GLint level,
GLenum pname, GLint *params )
{
const struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
const struct gl_texture_image *img = NULL;
GLint maxLevels;
gl_format texFormat;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetTexLevelParameteriv(current unit)");
return;
}
texUnit = _mesa_get_current_tex_unit(ctx);
/* this will catch bad target values */
maxLevels = _mesa_max_texture_levels(ctx, target);
if (maxLevels == 0) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetTexLevelParameter[if]v(target=0x%x)", target);
return;
}
if (level < 0 || level >= maxLevels) {
_mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
return;
}
texObj = _mesa_select_tex_object(ctx, texUnit, target);
img = _mesa_select_tex_image(ctx, texObj, target, level);
if (!img || img->TexFormat == MESA_FORMAT_NONE) {
/* undefined texture image */
if (pname == GL_TEXTURE_COMPONENTS)
*params = 1;
else
*params = 0;
return;
}
texFormat = img->TexFormat;
switch (pname) {
case GL_TEXTURE_WIDTH:
*params = img->Width;
break;
case GL_TEXTURE_HEIGHT:
*params = img->Height;
break;
case GL_TEXTURE_DEPTH:
*params = img->Depth;
break;
case GL_TEXTURE_INTERNAL_FORMAT:
if (_mesa_is_format_compressed(texFormat)) {
/* need to return the actual compressed format */
*params = _mesa_compressed_format_to_glenum(ctx, texFormat);
}
else {
/* If the true internal format is not compressed but the user
* requested a generic compressed format, we have to return the
* generic base format that matches.
*
* From page 119 (page 129 of the PDF) of the OpenGL 1.3 spec:
*
* "If no specific compressed format is available,
* internalformat is instead replaced by the corresponding base
* internal format."
*
* Otherwise just return the user's requested internal format
*/
const GLenum f =
_mesa_gl_compressed_format_base_format(img->InternalFormat);
*params = (f != 0) ? f : img->InternalFormat;
}
break;
case GL_TEXTURE_BORDER:
*params = img->Border;
break;
case GL_TEXTURE_RED_SIZE:
case GL_TEXTURE_GREEN_SIZE:
case GL_TEXTURE_BLUE_SIZE:
case GL_TEXTURE_ALPHA_SIZE:
if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
*params = _mesa_get_format_bits(texFormat, pname);
else
*params = 0;
break;
case GL_TEXTURE_INTENSITY_SIZE:
case GL_TEXTURE_LUMINANCE_SIZE:
if (_mesa_base_format_has_channel(img->_BaseFormat, pname)) {
*params = _mesa_get_format_bits(texFormat, pname);
if (*params == 0) {
/* intensity or luminance is probably stored as RGB[A] */
*params = MIN2(_mesa_get_format_bits(texFormat,
GL_TEXTURE_RED_SIZE),
_mesa_get_format_bits(texFormat,
GL_TEXTURE_GREEN_SIZE));
}
}
else {
*params = 0;
}
break;
case GL_TEXTURE_DEPTH_SIZE_ARB:
if (!ctx->Extensions.ARB_depth_texture)
goto invalid_pname;
*params = _mesa_get_format_bits(texFormat, pname);
break;
case GL_TEXTURE_STENCIL_SIZE_EXT:
if (!ctx->Extensions.EXT_packed_depth_stencil &&
!ctx->Extensions.ARB_framebuffer_object)
goto invalid_pname;
*params = _mesa_get_format_bits(texFormat, pname);
break;
case GL_TEXTURE_SHARED_SIZE:
if (ctx->Version < 30 &&
!ctx->Extensions.EXT_texture_shared_exponent)
goto invalid_pname;
*params = texFormat == MESA_FORMAT_RGB9_E5_FLOAT ? 5 : 0;
break;
/* GL_ARB_texture_compression */
case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
if (_mesa_is_format_compressed(texFormat) &&
!_mesa_is_proxy_texture(target)) {
*params = _mesa_format_image_size(texFormat, img->Width,
img->Height, img->Depth);
}
else {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetTexLevelParameter[if]v(pname)");
}
break;
case GL_TEXTURE_COMPRESSED:
*params = (GLint) _mesa_is_format_compressed(texFormat);
break;
/* GL_ARB_texture_float */
case GL_TEXTURE_RED_TYPE_ARB:
case GL_TEXTURE_GREEN_TYPE_ARB:
case GL_TEXTURE_BLUE_TYPE_ARB:
case GL_TEXTURE_ALPHA_TYPE_ARB:
case GL_TEXTURE_LUMINANCE_TYPE_ARB:
case GL_TEXTURE_INTENSITY_TYPE_ARB:
case GL_TEXTURE_DEPTH_TYPE_ARB:
if (!ctx->Extensions.ARB_texture_float)
goto invalid_pname;
if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
*params = _mesa_get_format_datatype(texFormat);
else
*params = GL_NONE;
break;
default:
goto invalid_pname;
}
/* no error if we get here */
return;
invalid_pname:
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetTexLevelParameter[if]v(pname=%s)",
_mesa_lookup_enum_by_nr(pname));
}
