* optimization! If we find that's not true on some systems, convert
* to a macro.
*/
-static INLINE GLfloat
-lerp_2d(GLfloat a, GLfloat b,
- GLfloat v00, GLfloat v10, GLfloat v01, GLfloat v11)
+static INLINE float
+lerp_2d(float a, float b,
+ float v00, float v10, float v01, float v11)
{
- const GLfloat temp0 = LERP(a, v00, v10);
- const GLfloat temp1 = LERP(a, v01, v11);
+ const float temp0 = LERP(a, v00, v10);
+ const float temp1 = LERP(a, v01, v11);
return LERP(b, temp0, temp1);
}
* \return integer texture index
*/
static INLINE GLint
-nearest_texcoord(GLuint wrapMode, GLfloat s, GLuint size)
+nearest_texcoord(GLuint wrapMode, float s, GLuint size)
{
GLint i;
switch (wrapMode) {
{
/* s limited to [min,max] */
/* i limited to [0, size-1] */
- const GLfloat min = 1.0F / (2.0F * size);
- const GLfloat max = 1.0F - min;
+ const float min = 1.0F / (2.0F * size);
+ const float max = 1.0F - min;
if (s < min)
i = 0;
else if (s > max)
{
/* s limited to [min,max] */
/* i limited to [-1, size] */
- const GLfloat min = -1.0F / (2.0F * size);
- const GLfloat max = 1.0F - min;
+ const float min = -1.0F / (2.0F * size);
+ const float max = 1.0F - min;
if (s <= min)
i = -1;
else if (s >= max)
return i;
case PIPE_TEX_WRAP_MIRROR_REPEAT:
{
- const GLfloat min = 1.0F / (2.0F * size);
- const GLfloat max = 1.0F - min;
+ const float min = 1.0F / (2.0F * size);
+ const float max = 1.0F - min;
const GLint flr = IFLOOR(s);
- GLfloat u;
+ float u;
if (flr & 1)
- u = 1.0F - (s - (GLfloat) flr);
+ u = 1.0F - (s - (float) flr);
else
- u = s - (GLfloat) flr;
+ u = s - (float) flr;
if (u < min)
i = 0;
else if (u > max)
{
/* s limited to [0,1] */
/* i limited to [0,size-1] */
- const GLfloat u = FABSF(s);
+ const float u = FABSF(s);
if (u <= 0.0F)
i = 0;
else if (u >= 1.0F)
{
/* s limited to [min,max] */
/* i limited to [0, size-1] */
- const GLfloat min = 1.0F / (2.0F * size);
- const GLfloat max = 1.0F - min;
- const GLfloat u = FABSF(s);
+ const float min = 1.0F / (2.0F * size);
+ const float max = 1.0F - min;
+ const float u = FABSF(s);
if (u < min)
i = 0;
else if (u > max)
{
/* s limited to [min,max] */
/* i limited to [0, size-1] */
- const GLfloat min = -1.0F / (2.0F * size);
- const GLfloat max = 1.0F - min;
- const GLfloat u = FABSF(s);
+ const float min = -1.0F / (2.0F * size);
+ const float max = 1.0F - min;
+ const float u = FABSF(s);
if (u < min)
i = -1;
else if (u > max)
* \param a returns blend factor/weight between texture indexes
*/
static INLINE void
-linear_texcoord(GLuint wrapMode, GLfloat s, GLuint size,
- GLint *i0, GLint *i1, GLfloat *a)
+linear_texcoord(GLuint wrapMode, float s, GLuint size,
+ GLint *i0, GLint *i1, float *a)
{
- GLfloat u;
+ float u;
switch (wrapMode) {
case PIPE_TEX_WRAP_REPEAT:
u = s * size - 0.5F;
if (s <= 0.0F)
u = 0.0F;
else if (s >= 1.0F)
- u = (GLfloat) size;
+ u = (float) size;
else
u = s * size;
u -= 0.5F;
if (s <= 0.0F)
u = 0.0F;
else if (s >= 1.0F)
- u = (GLfloat) size;
+ u = (float) size;
else
u = s * size;
u -= 0.5F;
break;
case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
{
- const GLfloat min = -1.0F / (2.0F * size);
- const GLfloat max = 1.0F - min;
+ const float min = -1.0F / (2.0F * size);
+ const float max = 1.0F - min;
if (s <= min)
u = min * size;
else if (s >= max)
{
const GLint flr = IFLOOR(s);
if (flr & 1)
- u = 1.0F - (s - (GLfloat) flr);
+ u = 1.0F - (s - (float) flr);
else
- u = s - (GLfloat) flr;
+ u = s - (float) flr;
u = (u * size) - 0.5F;
*i0 = IFLOOR(u);
*i1 = *i0 + 1;
case PIPE_TEX_WRAP_MIRROR_CLAMP:
u = FABSF(s);
if (u >= 1.0F)
- u = (GLfloat) size;
+ u = (float) size;
else
u *= size;
u -= 0.5F;
case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
u = FABSF(s);
if (u >= 1.0F)
- u = (GLfloat) size;
+ u = (float) size;
else
u *= size;
u -= 0.5F;
break;
case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
{
- const GLfloat min = -1.0F / (2.0F * size);
- const GLfloat max = 1.0F - min;
+ const float min = -1.0F / (2.0F * size);
+ const float max = 1.0F - min;
u = FABSF(s);
if (u <= min)
u = min * size;
static GLuint
-choose_cube_face(const GLfloat texcoord[4], GLfloat newCoord[4])
+choose_cube_face(float rx, float ry, float rz,
+ float newCoord[4])
{
/*
major axis
+rz TEXTURE_CUBE_MAP_POSITIVE_Z_EXT +rx -ry rz
-rz TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT -rx -ry rz
*/
- const GLfloat rx = texcoord[0];
- const GLfloat ry = texcoord[1];
- const GLfloat rz = texcoord[2];
- const GLfloat arx = FABSF(rx), ary = FABSF(ry), arz = FABSF(rz);
+ const float arx = FABSF(rx), ary = FABSF(ry), arz = FABSF(rz);
GLuint face;
- GLfloat sc, tc, ma;
+ float sc, tc, ma;
if (arx > ary && arx > arz) {
if (rx >= 0.0F) {
}
+/**
+ * Examine the quad's texture coordinates to compute the partial
+ * derivatives w.r.t X and Y, then compute lambda (level of detail).
+ *
+ * This is only done for fragment shaders, not vertex shaders.
+ */
+static float
+compute_lambda(struct tgsi_sampler *sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE])
+{
+ float rho, lambda;
+
+ assert(s);
+ {
+ float dsdx = s[QUAD_BOTTOM_RIGHT] - s[QUAD_BOTTOM_LEFT];
+ float dsdy = s[QUAD_TOP_LEFT] - s[QUAD_BOTTOM_LEFT];
+ dsdx = FABSF(dsdx);
+ dsdy = FABSF(dsdy);
+ rho = MAX2(dsdx, dsdy) * sampler->texture->width0;
+ }
+ if (t) {
+ float dtdx = t[QUAD_BOTTOM_RIGHT] - t[QUAD_BOTTOM_LEFT];
+ float dtdy = t[QUAD_TOP_LEFT] - t[QUAD_BOTTOM_LEFT];
+ float max;
+ dtdx = FABSF(dtdx);
+ dtdy = FABSF(dtdy);
+ max = MAX2(dtdx, dtdy) * sampler->texture->height0;
+ rho = MAX2(rho, max);
+ }
+ if (p) {
+ float dpdx = p[QUAD_BOTTOM_RIGHT] - p[QUAD_BOTTOM_LEFT];
+ float dpdy = p[QUAD_TOP_LEFT] - p[QUAD_BOTTOM_LEFT];
+ float max;
+ dpdx = FABSF(dpdx);
+ dpdy = FABSF(dpdy);
+ max = MAX2(dpdx, dpdy) * sampler->texture->depth0;
+ rho = MAX2(rho, max);
+ }
+
+ lambda = LOG2(rho);
+
+ lambda += sampler->state->lod_bias;
+ lambda = CLAMP(lambda, sampler->state->min_lod, sampler->state->max_lod);
+
+ return lambda;
+}
+
+
static void
-sp_get_sample_1d(struct tgsi_sampler *sampler,
- const GLfloat strq[4], GLfloat lambda, GLfloat rgba[4])
+sp_get_samples_1d(struct tgsi_sampler *sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
{
struct pipe_context *pipe = (struct pipe_context *) sampler->pipe;
struct pipe_surface *ps
switch (sampler->state->min_img_filter) {
case PIPE_TEX_FILTER_NEAREST:
{
- GLint x;
- x = nearest_texcoord(sampler->state->wrap_s, strq[0],
- sampler->texture->width0);
- ps->get_tile(ps, x, 0, 1, 1, rgba);
+ GLuint j;
+ for (j = 0; j < QUAD_SIZE; j++) {
+ GLint x = nearest_texcoord(sampler->state->wrap_s, s[j],
+ sampler->texture->width0);
+ float texel[4];
+ ps->get_tile(ps, x, 0, 1, 1, texel);
+ rgba[0][j] = texel[0];
+ rgba[1][j] = texel[1];
+ rgba[2][j] = texel[2];
+ rgba[3][j] = texel[3];
+ }
}
break;
case PIPE_TEX_FILTER_LINEAR:
{
- GLfloat t0[4], t1[4];
- GLint x0, x1;
- GLfloat a;
- linear_texcoord(sampler->state->wrap_s, strq[0],
- sampler->texture->width0, &x0, &x1, &a);
- ps->get_tile(ps, x0, 0, 1, 1, t0);
- ps->get_tile(ps, x1, 0, 1, 1, t1);
-
- rgba[0] = LERP(a, t0[0], t1[0]);
- rgba[1] = LERP(a, t0[1], t1[1]);
- rgba[2] = LERP(a, t0[2], t1[2]);
- rgba[3] = LERP(a, t0[3], t1[3]);
+ GLuint j;
+ for (j = 0; j < QUAD_SIZE; j++) {
+ float t0[4], t1[4], texel[4];
+ GLint x0, x1;
+ float a;
+ linear_texcoord(sampler->state->wrap_s, s[j],
+ sampler->texture->width0, &x0, &x1, &a);
+ ps->get_tile(ps, x0, 0, 1, 1, t0);
+ ps->get_tile(ps, x1, 0, 1, 1, t1);
+
+ texel[0] = LERP(a, t0[0], t1[0]);
+ texel[1] = LERP(a, t0[1], t1[1]);
+ texel[2] = LERP(a, t0[2], t1[2]);
+ texel[3] = LERP(a, t0[3], t1[3]);
+ rgba[0][j] = texel[0];
+ rgba[1][j] = texel[1];
+ rgba[2][j] = texel[2];
+ rgba[3][j] = texel[3];
+ }
}
break;
default:
}
static GLuint
-choose_mipmap_level(struct tgsi_sampler *sampler, GLfloat lambda)
+choose_mipmap_level(struct tgsi_sampler *sampler, float lambda)
{
if (sampler->state->min_mip_filter == PIPE_TEX_MIPFILTER_NONE) {
return 0;
/**
- * Called via tgsi_sampler::get_sample()
+ * Load the texture cache with a new texture tile.
+ */
+static void
+cache_tex_tile(struct tgsi_sampler *sampler,
+ unsigned face, unsigned level, unsigned zslice, int cx, int cy)
+{
+ struct pipe_context *pipe = (struct pipe_context *) sampler->pipe;
+ struct pipe_surface *ps
+ = pipe->get_tex_surface(pipe, sampler->texture, face, level, zslice);
+ assert(ps->width == sampler->texture->level[level].width);
+ assert(ps->height == sampler->texture->level[level].height);
+ sampler->cache_level = level;
+ sampler->cache_x = cx;
+ sampler->cache_y = cy;
+ ps->get_tile(ps,
+ cx * SAMPLER_CACHE_SIZE,
+ cy * SAMPLER_CACHE_SIZE,
+ SAMPLER_CACHE_SIZE, SAMPLER_CACHE_SIZE,
+ (float *) sampler->cache);
+}
+
+
+/**
+ * Get a texel from a texture.
+ * \param face the cube face in 0..5
+ * \param level the mipmap level
+ * \param zslize which slice of a 3D texture
+ * \param x the x coord of texel within 2D image
+ * \param y the y coord of texel within 2D image
+ * \param rgba the quad to put the texel/color into
+ * \param j which element of the rgba quad to write to
+ */
+static void
+get_texel(struct tgsi_sampler *sampler,
+ unsigned face, unsigned level, unsigned zslice, int x, int y,
+ float rgba[NUM_CHANNELS][QUAD_SIZE], GLuint j)
+{
+ int cx = x / SAMPLER_CACHE_SIZE;
+ int cy = y / SAMPLER_CACHE_SIZE;
+
+ if (cx != sampler->cache_x || cy != sampler->cache_y ||
+ level != sampler->cache_level) {
+ cache_tex_tile(sampler, face, level, zslice, cx, cy);
+ printf("cache miss (%d, %d)\n", x, y);
+ }
+ else {
+ printf("cache hit (%d, %d)\n", x, y);
+ }
+
+ /* get texel from cache */
+ cx = x % SAMPLER_CACHE_SIZE;
+ cy = y % SAMPLER_CACHE_SIZE;
+ rgba[0][j] = sampler->cache[cy][cx][0];
+ rgba[1][j] = sampler->cache[cy][cx][1];
+ rgba[2][j] = sampler->cache[cy][cx][2];
+ rgba[3][j] = sampler->cache[cy][cx][3];
+}
+
+
+
+/**
+ * Called via tgsi_sampler::get_samples()
* Use the sampler's state setting to get a filtered RGBA value
* from the sampler's texture (mipmap tree).
*
* a new tgsi_sampler object for each state combo it finds....
*/
static void
-sp_get_sample_2d(struct tgsi_sampler *sampler,
- const GLfloat strq[4], GLfloat lambda, GLfloat rgba[4])
+sp_get_samples_2d(struct tgsi_sampler *sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
{
- struct pipe_context *pipe = (struct pipe_context *) sampler->pipe;
- GLuint filter;
- GLint level0;
-
- if (lambda < 0.0)
- filter = sampler->state->mag_img_filter;
- else
- filter = sampler->state->min_img_filter;
+ GLuint j, imgFilter;
+ int level0, width, height;
+
+ /* compute level0 and imgFilter */
+ switch (sampler->state->min_mip_filter) {
+ case PIPE_TEX_MIPFILTER_NONE:
+ imgFilter = sampler->state->mag_img_filter;
+ level0 = 0;
+ assert(sampler->state->min_img_filter ==
+ sampler->state->mag_img_filter);
+ break;
+ default:
+ {
+ float lambda = compute_lambda(sampler, s, t, p);
+ if (lambda < 0.0)
+ imgFilter = sampler->state->mag_img_filter;
+ else
+ imgFilter = sampler->state->min_img_filter;
+ level0 = choose_mipmap_level(sampler, lambda);
+ }
+ }
- level0 = choose_mipmap_level(sampler, lambda);
+ width = sampler->texture->level[level0].width;
+ height = sampler->texture->level[level0].height;
- assert(sampler->texture->level[level0].width);
+ assert(width > 0);
- switch (filter) {
+ switch (imgFilter) {
case PIPE_TEX_FILTER_NEAREST:
- {
- GLint x = nearest_texcoord(sampler->state->wrap_s, strq[0],
- sampler->texture->level[level0].width);
- GLint y = nearest_texcoord(sampler->state->wrap_t, strq[1],
- sampler->texture->level[level0].height);
- GLint cx = x / SAMPLER_CACHE_SIZE;
- GLint cy = y / SAMPLER_CACHE_SIZE;
- if (cx != sampler->cache_x || cy != sampler->cache_y ||
- level0 != sampler->cache_level) {
- /* cache miss, replace cache with new tile */
- struct pipe_surface *ps
- = pipe->get_tex_surface(pipe, sampler->texture, 0, level0, 0);
- assert(ps->width == sampler->texture->level[level0].width);
- assert(ps->height == sampler->texture->level[level0].height);
- sampler->cache_level = level0;
- sampler->cache_x = cx;
- sampler->cache_y = cy;
- ps->get_tile(ps,
- cx * SAMPLER_CACHE_SIZE,
- cy * SAMPLER_CACHE_SIZE,
- SAMPLER_CACHE_SIZE, SAMPLER_CACHE_SIZE,
- (GLfloat *) sampler->cache);
- /*printf("cache miss (%d, %d)\n", x, y);*/
- }
- else {
- /*printf("cache hit (%d, %d)\n", x, y);*/
- }
- /* get texel from cache */
- cx = x % SAMPLER_CACHE_SIZE;
- cy = y % SAMPLER_CACHE_SIZE;
- COPY_4V(rgba, sampler->cache[cy][cx]);
+ for (j = 0; j < QUAD_SIZE; j++) {
+ int x = nearest_texcoord(sampler->state->wrap_s, s[j], width);
+ int y = nearest_texcoord(sampler->state->wrap_t, t[j], height);
+ get_texel(sampler, 0, level0, 0, x, y, rgba, j);
}
break;
case PIPE_TEX_FILTER_LINEAR:
- {
- GLfloat t00[4], t01[4], t10[4], t11[4];
- GLint x0, y0, x1, y1;
- GLfloat a, b;
- struct pipe_surface *ps
- = pipe->get_tex_surface(pipe, sampler->texture, 0, level0, 0);
-
- linear_texcoord(sampler->state->wrap_s, strq[0],
- sampler->texture->width0, &x0, &x1, &a);
- linear_texcoord(sampler->state->wrap_t, strq[1],
- sampler->texture->height0, &y0, &y1, &b);
- ps->get_tile(ps, x0, y0, 1, 1, t00);
- ps->get_tile(ps, x1, y0, 1, 1, t10);
- ps->get_tile(ps, x0, y1, 1, 1, t01);
- ps->get_tile(ps, x1, y1, 1, 1, t11);
-
- rgba[0] = lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]);
- rgba[1] = lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]);
- rgba[2] = lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]);
- rgba[3] = lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]);
- }
- break;
- /*
- {
- GLuint level0, level1;
- level0 = choose_mipmap_level(sampler, lambda);
+ for (j = 0; j < QUAD_SIZE; j++) {
+ float tx[4][4], a, b;
+ int x0, y0, x1, y1, c;
+ linear_texcoord(sampler->state->wrap_s, s[j], width, &x0, &x1, &a);
+ linear_texcoord(sampler->state->wrap_t, t[j], height, &y0, &y1, &b);
+ get_texel(sampler, 0, level0, 0, x0, y0, tx, 0);
+ get_texel(sampler, 0, level0, 0, x1, y0, tx, 1);
+ get_texel(sampler, 0, level0, 0, x0, y1, tx, 2);
+ get_texel(sampler, 0, level0, 0, x1, y1, tx, 3);
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = lerp_2d(a, b, tx[c][0], tx[c][1], tx[c][2], tx[c][3]);
+ }
}
break;
- */
default:
assert(0);
}
static void
-sp_get_sample_3d(struct tgsi_sampler *sampler,
- const GLfloat strq[4], GLfloat lamba, GLfloat rgba[4])
+sp_get_samples_3d(struct tgsi_sampler *sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
{
/* get/map pipe_surfaces corresponding to 3D tex slices */
}
static void
-sp_get_sample_cube(struct tgsi_sampler *sampler,
- const GLfloat strq[4], GLfloat lambda, GLfloat rgba[4])
+sp_get_samples_cube(struct tgsi_sampler *sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
{
- GLfloat st[4];
- GLuint face = choose_cube_face(strq, st);
-
- /* get/map surface corresponding to the face */
+ GLuint j;
+ for (j = 0; j < QUAD_SIZE; j++) {
+ float st[4];
+ GLuint face = choose_cube_face(s[j], t[j], p[j], st);
+ (void) face;
+ /* get/map surface corresponding to the face */
+ }
}
void
-sp_get_sample(struct tgsi_sampler *sampler,
- const GLfloat strq[4], GLfloat lambda, GLfloat rgba[4])
+sp_get_samples(struct tgsi_sampler *sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
{
switch (sampler->texture->target) {
case GL_TEXTURE_1D:
- sp_get_sample_1d(sampler, strq, lambda, rgba);
+ sp_get_samples_1d(sampler, s, t, p, rgba);
break;
case GL_TEXTURE_2D:
- sp_get_sample_2d(sampler, strq, lambda, rgba);
+ sp_get_samples_2d(sampler, s, t, p, rgba);
break;
case GL_TEXTURE_3D:
- sp_get_sample_3d(sampler, strq, lambda, rgba);
+ sp_get_samples_3d(sampler, s, t, p, rgba);
break;
case GL_TEXTURE_CUBE_MAP:
- sp_get_sample_cube(sampler, strq, lambda, rgba);
+ sp_get_samples_cube(sampler, s, t, p, rgba);
break;
default:
assert(0);
projects / profile / ivi / mesa.git / commitdiff