/**************************************************************************
*
- * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * Copyright 2007 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
/*
* Authors:
- * Keith Whitwell <keith@tungstengraphics.com>
+ * Keith Whitwell <keithw@vmware.com>
* Brian Paul
*/
/**
- * Combine depth texture mode with "swizzle" so that depth mode swizzling
- * takes place before texture swizzling, and return the resulting swizzle.
- * If the format is not a depth format, return "swizzle" unchanged.
- *
- * \param format PIPE_FORMAT_*.
- * \param swizzle Texture swizzle, a bitmask computed using MAKE_SWIZZLE4.
- * \param depthmode One of GL_LUMINANCE, GL_INTENSITY, GL_ALPHA, GL_RED.
+ * Return swizzle1(swizzle2)
*/
-static GLuint
-apply_depthmode(enum pipe_format format, GLuint swizzle, GLenum depthmode)
+static unsigned
+swizzle_swizzle(unsigned swizzle1, unsigned swizzle2)
{
- const struct util_format_description *desc =
- util_format_description(format);
- unsigned char swiz[4];
- unsigned i;
-
- if (desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS ||
- desc->swizzle[0] == UTIL_FORMAT_SWIZZLE_NONE) {
- /* Not a depth format. */
- return swizzle;
+ unsigned i, swz[4];
+
+ for (i = 0; i < 4; i++) {
+ unsigned s = GET_SWZ(swizzle1, i);
+ switch (s) {
+ case SWIZZLE_X:
+ case SWIZZLE_Y:
+ case SWIZZLE_Z:
+ case SWIZZLE_W:
+ swz[i] = GET_SWZ(swizzle2, s);
+ break;
+ case SWIZZLE_ZERO:
+ swz[i] = SWIZZLE_ZERO;
+ break;
+ case SWIZZLE_ONE:
+ swz[i] = SWIZZLE_ONE;
+ break;
+ default:
+ assert(!"Bad swizzle term");
+ swz[i] = SWIZZLE_X;
+ }
}
- for (i = 0; i < 4; i++)
- swiz[i] = GET_SWZ(swizzle, i);
+ return MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);
+}
- switch (depthmode) {
- case GL_LUMINANCE:
- /* Rewrite reads from W to ONE, and reads from XYZ to XXX. */
- for (i = 0; i < 4; i++)
- if (swiz[i] == SWIZZLE_W)
- swiz[i] = SWIZZLE_ONE;
- else if (swiz[i] < SWIZZLE_W)
- swiz[i] = SWIZZLE_X;
- break;
+/**
+ * Given a user-specified texture base format, the actual gallium texture
+ * format and the current GL_DEPTH_MODE, return a texture swizzle.
+ *
+ * Consider the case where the user requests a GL_RGB internal texture
+ * format the driver actually uses an RGBA format. The A component should
+ * be ignored and sampling from the texture should always return (r,g,b,1).
+ * But if we rendered to the texture we might have written A values != 1.
+ * By sampling the texture with a ".xyz1" swizzle we'll get the expected A=1.
+ * This function computes the texture swizzle needed to get the expected
+ * values.
+ *
+ * In the case of depth textures, the GL_DEPTH_MODE state determines the
+ * texture swizzle.
+ *
+ * This result must be composed with the user-specified swizzle to get
+ * the final swizzle.
+ */
+static unsigned
+compute_texture_format_swizzle(GLenum baseFormat, GLenum depthMode,
+ enum pipe_format actualFormat)
+{
+ switch (baseFormat) {
+ case GL_RGBA:
+ return SWIZZLE_XYZW;
+ case GL_RGB:
+ if (util_format_has_alpha(actualFormat))
+ return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_ONE);
+ else
+ return SWIZZLE_XYZW;
+ case GL_RG:
+ if (util_format_get_nr_components(actualFormat) > 2)
+ return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_ZERO, SWIZZLE_ONE);
+ else
+ return SWIZZLE_XYZW;
+ case GL_RED:
+ if (util_format_get_nr_components(actualFormat) > 1)
+ return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_ZERO,
+ SWIZZLE_ZERO, SWIZZLE_ONE);
+ else
+ return SWIZZLE_XYZW;
+ case GL_ALPHA:
+ if (util_format_get_nr_components(actualFormat) > 1)
+ return MAKE_SWIZZLE4(SWIZZLE_ZERO, SWIZZLE_ZERO,
+ SWIZZLE_ZERO, SWIZZLE_W);
+ else
+ return SWIZZLE_XYZW;
+ case GL_LUMINANCE:
+ if (util_format_get_nr_components(actualFormat) > 1)
+ return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_ONE);
+ else
+ return SWIZZLE_XYZW;
+ case GL_LUMINANCE_ALPHA:
+ if (util_format_get_nr_components(actualFormat) > 2)
+ return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_W);
+ else
+ return SWIZZLE_XYZW;
+ case GL_INTENSITY:
+ if (util_format_get_nr_components(actualFormat) > 1)
+ return SWIZZLE_XXXX;
+ else
+ return SWIZZLE_XYZW;
+ case GL_STENCIL_INDEX:
+ return SWIZZLE_XYZW;
+ case GL_DEPTH_STENCIL:
+ /* fall-through */
+ case GL_DEPTH_COMPONENT:
+ /* Now examine the depth mode */
+ switch (depthMode) {
+ case GL_LUMINANCE:
+ return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_ONE);
case GL_INTENSITY:
- /* Rewrite reads from XYZW to XXXX. */
- for (i = 0; i < 4; i++)
- if (swiz[i] <= SWIZZLE_W)
- swiz[i] = SWIZZLE_X;
- break;
-
+ return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_X);
case GL_ALPHA:
- /* Rewrite reads from W to X, and reads from XYZ to 000. */
- for (i = 0; i < 4; i++)
- if (swiz[i] == SWIZZLE_W)
- swiz[i] = SWIZZLE_X;
- else if (swiz[i] < SWIZZLE_W)
- swiz[i] = SWIZZLE_ZERO;
- break;
+ return MAKE_SWIZZLE4(SWIZZLE_ZERO, SWIZZLE_ZERO,
+ SWIZZLE_ZERO, SWIZZLE_X);
case GL_RED:
- /* Rewrite reads W to 1, XYZ to X00 */
- for (i = 0; i < 4; i++)
- if (swiz[i] == SWIZZLE_W)
- swiz[i] = SWIZZLE_ONE;
- else if (swiz[i] == SWIZZLE_Y || swiz[i] == SWIZZLE_Z)
- swiz[i] = SWIZZLE_ZERO;
- break;
+ return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_ZERO,
+ SWIZZLE_ZERO, SWIZZLE_ONE);
+ default:
+ assert(!"Unexpected depthMode");
+ return SWIZZLE_XYZW;
+ }
+ default:
+ assert(!"Unexpected baseFormat");
+ return SWIZZLE_XYZW;
}
-
- return MAKE_SWIZZLE4(swiz[0], swiz[1], swiz[2], swiz[3]);
}
+static unsigned
+get_texture_format_swizzle(const struct st_texture_object *stObj)
+{
+ const struct gl_texture_image *texImage =
+ stObj->base.Image[0][stObj->base.BaseLevel];
+ unsigned tex_swizzle;
+
+ if (texImage) {
+ tex_swizzle = compute_texture_format_swizzle(texImage->_BaseFormat,
+ stObj->base.DepthMode,
+ stObj->pt->format);
+ }
+ else {
+ tex_swizzle = SWIZZLE_XYZW;
+ }
+
+ /* Combine the texture format swizzle with user's swizzle */
+ return swizzle_swizzle(stObj->base._Swizzle, tex_swizzle);
+}
+
+
/**
- * Return TRUE if the swizzling described by "swizzle" and
- * "depthmode" (for depth textures only) is different from the swizzling
- * set in the given sampler view.
+ * Return TRUE if the texture's sampler view swizzle is equal to
+ * the texture's swizzle.
*
- * \param sv A sampler view.
- * \param swizzle Texture swizzle, a bitmask computed using MAKE_SWIZZLE4.
- * \param depthmode One of GL_LUMINANCE, GL_INTENSITY, GL_ALPHA.
+ * \param stObj the st texture object,
*/
static boolean
-check_sampler_swizzle(struct pipe_sampler_view *sv,
- GLuint swizzle, GLenum depthmode)
+check_sampler_swizzle(const struct st_texture_object *stObj,
+ struct pipe_sampler_view *sv)
+{
+ unsigned swizzle = get_texture_format_swizzle(stObj);
+
+ return ((sv->swizzle_r != GET_SWZ(swizzle, 0)) ||
+ (sv->swizzle_g != GET_SWZ(swizzle, 1)) ||
+ (sv->swizzle_b != GET_SWZ(swizzle, 2)) ||
+ (sv->swizzle_a != GET_SWZ(swizzle, 3)));
+}
+
+
+static unsigned last_level(struct st_texture_object *stObj)
{
- swizzle = apply_depthmode(sv->texture->format, swizzle, depthmode);
-
- if ((sv->swizzle_r != GET_SWZ(swizzle, 0)) ||
- (sv->swizzle_g != GET_SWZ(swizzle, 1)) ||
- (sv->swizzle_b != GET_SWZ(swizzle, 2)) ||
- (sv->swizzle_a != GET_SWZ(swizzle, 3)))
- return TRUE;
- return FALSE;
+ return MIN2(stObj->base._MaxLevel, stObj->pt->last_level);
}
enum pipe_format format)
{
struct pipe_sampler_view templ;
- GLuint swizzle = apply_depthmode(stObj->pt->format,
- stObj->base._Swizzle,
- stObj->base.DepthMode);
+ unsigned swizzle = get_texture_format_swizzle(stObj);
u_sampler_view_default_template(&templ,
stObj->pt,
format);
- templ.u.tex.first_level = stObj->base.BaseLevel;
+
+ if (stObj->pt->target == PIPE_BUFFER) {
+ unsigned base, size;
+ unsigned f, n;
+ const struct util_format_description *desc
+ = util_format_description(templ.format);
+
+ base = stObj->base.BufferOffset;
+ if (base >= stObj->pt->width0)
+ return NULL;
+ size = MIN2(stObj->pt->width0 - base, (unsigned)stObj->base.BufferSize);
+
+ f = ((base * 8) / desc->block.bits) * desc->block.width;
+ n = ((size * 8) / desc->block.bits) * desc->block.width;
+ if (!n)
+ return NULL;
+ templ.u.buf.first_element = f;
+ templ.u.buf.last_element = f + (n - 1);
+ } else {
+ templ.u.tex.first_level = stObj->base.BaseLevel;
+ templ.u.tex.last_level = last_level(stObj);
+ assert(templ.u.tex.first_level <= templ.u.tex.last_level);
+ }
if (swizzle != SWIZZLE_NOOP) {
templ.swizzle_r = GET_SWZ(swizzle, 0);
static struct pipe_sampler_view *
-st_get_texture_sampler_view_from_stobj(struct st_texture_object *stObj,
- struct pipe_context *pipe,
+st_get_texture_sampler_view_from_stobj(struct st_context *st,
+ struct st_texture_object *stObj,
const struct gl_sampler_object *samp,
enum pipe_format format)
{
+ struct pipe_sampler_view **sv;
+
if (!stObj || !stObj->pt) {
return NULL;
}
- if (!stObj->sampler_view) {
- stObj->sampler_view =
- st_create_texture_sampler_view_from_stobj(pipe, stObj, samp, format);
+ sv = st_texture_get_sampler_view(st, stObj);
+
+ if (stObj->base.StencilSampling &&
+ util_format_is_depth_and_stencil(format))
+ format = util_format_stencil_only(format);
+
+ /* if sampler view has changed dereference it */
+ if (*sv) {
+ if (check_sampler_swizzle(stObj, *sv) ||
+ (format != (*sv)->format) ||
+ stObj->base.BaseLevel != (*sv)->u.tex.first_level ||
+ last_level(stObj) != (*sv)->u.tex.last_level) {
+ pipe_sampler_view_reference(sv, NULL);
+ }
}
- return stObj->sampler_view;
-}
+ if (!*sv) {
+ *sv = st_create_texture_sampler_view_from_stobj(st->pipe, stObj, samp, format);
+ } else if ((*sv)->context != st->pipe) {
+ /* Recreate view in correct context, use existing view as template */
+ struct pipe_sampler_view *new_sv =
+ st->pipe->create_sampler_view(st->pipe, stObj->pt, *sv);
+ pipe_sampler_view_reference(sv, NULL);
+ *sv = new_sv;
+ }
+
+ return *sv;
+}
static GLboolean
update_single_texture(struct st_context *st,
struct pipe_sampler_view **sampler_view,
GLuint texUnit)
{
- struct pipe_context *pipe = st->pipe;
struct gl_context *ctx = st->ctx;
const struct gl_sampler_object *samp;
struct gl_texture_object *texObj;
struct st_texture_object *stObj;
- enum pipe_format st_view_format;
+ enum pipe_format view_format;
GLboolean retval;
samp = _mesa_get_samplerobj(ctx, texUnit);
}
/* Determine the format of the texture sampler view */
- st_view_format = stObj->pt->format;
-
- {
- gl_format texFormat;
- enum pipe_format firstImageFormat;
-
- if (texObj->Target == GL_TEXTURE_BUFFER) {
- texFormat = stObj->base._BufferObjectFormat;
- } else {
- const struct st_texture_image *firstImage =
- st_texture_image(stObj->base.Image[0][stObj->base.BaseLevel]);
- texFormat = firstImage->base.TexFormat;
- }
- firstImageFormat = st_mesa_format_to_pipe_format(texFormat);
- if ((samp->sRGBDecode == GL_SKIP_DECODE_EXT) &&
- (_mesa_get_format_color_encoding(texFormat) == GL_SRGB)) {
- /* Don't do sRGB->RGB conversion. Interpret the texture data as
- * linear values.
- */
- const gl_format linearFormat =
- _mesa_get_srgb_format_linear(texFormat);
- firstImageFormat = st_mesa_format_to_pipe_format(linearFormat);
- }
-
- if (firstImageFormat != stObj->pt->format)
- st_view_format = firstImageFormat;
+ if (texObj->Target == GL_TEXTURE_BUFFER) {
+ view_format =
+ st_mesa_format_to_pipe_format(stObj->base._BufferObjectFormat);
}
+ else {
+ view_format =
+ stObj->surface_based ? stObj->surface_format : stObj->pt->format;
- /* if sampler view has changed dereference it */
- if (stObj->sampler_view) {
- if (check_sampler_swizzle(stObj->sampler_view,
- stObj->base._Swizzle,
- stObj->base.DepthMode) ||
- (st_view_format != stObj->sampler_view->format) ||
- stObj->base.BaseLevel != stObj->sampler_view->u.tex.first_level) {
- pipe_sampler_view_reference(&stObj->sampler_view, NULL);
+ /* If sRGB decoding is off, use the linear format */
+ if (samp->sRGBDecode == GL_SKIP_DECODE_EXT) {
+ view_format = util_format_linear(view_format);
}
}
- *sampler_view = st_get_texture_sampler_view_from_stobj(stObj, pipe,
- samp,
- st_view_format);
+ *sampler_view = st_get_texture_sampler_view_from_stobj(st, stObj, samp,
+ view_format);
return GL_TRUE;
}
{
const GLuint old_max = *num_textures;
GLbitfield samplers_used = prog->SamplersUsed;
- GLuint unit, new_count;
+ GLuint unit;
if (samplers_used == 0x0 && old_max == 0)
return;
pipe_sampler_view_reference(&(sampler_views[unit]), sampler_view);
}
- /* Ex: if old_max = 3 and *num_textures = 1, we need to pass an
- * array of views={X, NULL, NULL} to unref the old texture views
- * at positions [1] and [2].
- */
- new_count = MAX2(*num_textures, old_max);
- assert(new_count <= max_units);
-
cso_set_sampler_views(st->cso_context,
shader_stage,
- new_count,
+ *num_textures,
sampler_views);
}
{
const struct gl_context *ctx = st->ctx;
- if (ctx->Const.MaxVertexTextureImageUnits > 0) {
+ if (ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits > 0) {
update_textures(st,
PIPE_SHADER_VERTEX,
&ctx->VertexProgram._Current->Base,
- ctx->Const.MaxVertexTextureImageUnits,
+ ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits,
st->state.sampler_views[PIPE_SHADER_VERTEX],
&st->state.num_sampler_views[PIPE_SHADER_VERTEX]);
}
update_textures(st,
PIPE_SHADER_FRAGMENT,
&ctx->FragmentProgram._Current->Base,
- ctx->Const.MaxTextureImageUnits,
+ ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
st->state.sampler_views[PIPE_SHADER_FRAGMENT],
&st->state.num_sampler_views[PIPE_SHADER_FRAGMENT]);
}
update_textures(st,
PIPE_SHADER_GEOMETRY,
&ctx->GeometryProgram._Current->Base,
- ctx->Const.MaxTextureImageUnits,
+ ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits,
st->state.sampler_views[PIPE_SHADER_GEOMETRY],
&st->state.num_sampler_views[PIPE_SHADER_GEOMETRY]);
}
projects / mesa.git / blobdiff