/**
* Called via ctx->Driver.GenerateMipmap()
* Note: We don't yet support 3D textures, 1D/2D array textures or texture
* borders.
*/
void
_mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
struct gl_texture_object *texObj)
{
struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;
struct vertex verts[4];
const GLuint baseLevel = texObj->BaseLevel;
const GLuint maxLevel = texObj->MaxLevel;
const GLint maxLevelSave = texObj->MaxLevel;
const GLboolean genMipmapSave = texObj->GenerateMipmap;
const GLuint currentTexUnitSave = ctx->Texture.CurrentUnit;
const GLboolean use_glsl_version = ctx->Extensions.ARB_vertex_shader &&
ctx->Extensions.ARB_fragment_shader;
GLenum faceTarget;
GLuint dstLevel;
GLuint samplerSave;
GLint swizzle[4];
GLboolean swizzleSaved = GL_FALSE;
if (fallback_required(ctx, target, texObj)) {
_mesa_generate_mipmap(ctx, target, texObj);
return;
}
if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) {
faceTarget = target;
target = GL_TEXTURE_CUBE_MAP;
} else {
faceTarget = target;
}
_mesa_meta_begin(ctx, MESA_META_ALL & ~MESA_META_DRAW_BUFFERS);
/* Choose between glsl version and fixed function version of
* GenerateMipmap function.
*/
if (use_glsl_version) {
_mesa_meta_setup_vertex_objects(&mipmap->VAO, &mipmap->VBO, true,
2, 4, 0);
_mesa_meta_setup_blit_shader(ctx, target, false, &mipmap->shaders);
} else {
_mesa_meta_setup_ff_tnl_for_blit(&mipmap->VAO, &mipmap->VBO, 3);
_mesa_set_enable(ctx, target, GL_TRUE);
}
samplerSave = ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ?
ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0;
if (currentTexUnitSave != 0)
glBindTexture(target, texObj->Name);
if (!mipmap->Sampler) {
glGenSamplers(1, &mipmap->Sampler);
glBindSampler(ctx->Texture.CurrentUnit, mipmap->Sampler);
glSamplerParameteri(mipmap->Sampler,
GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_LINEAR);
glSamplerParameteri(mipmap->Sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glSamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glSamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
/* We don't want to encode or decode sRGB values; treat them as linear.
* This is not technically correct for GLES3 but we don't get any API
* error at the moment.
*/
if (ctx->Extensions.EXT_texture_sRGB_decode) {
glSamplerParameteri(mipmap->Sampler, GL_TEXTURE_SRGB_DECODE_EXT,
GL_SKIP_DECODE_EXT);
}
} else {
glBindSampler(ctx->Texture.CurrentUnit, mipmap->Sampler);
}
assert(mipmap->FBO != 0);
glBindFramebuffer(GL_FRAMEBUFFER, mipmap->FBO);
glTexParameteri(target, GL_GENERATE_MIPMAP, GL_FALSE);
// if (texObj->_Swizzle != SWIZZLE_NOOP) {
// static const GLint swizzleNoop[4] = { GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA };
// memcpy(swizzle, texObj->Swizzle, sizeof(swizzle));
// swizzleSaved = GL_TRUE;
// glTexParameteriv(target, GL_TEXTURE_SWIZZLE_RGBA, swizzleNoop);
// }
/* Silence valgrind warnings about reading uninitialized stack. */
memset(verts, 0, sizeof(verts));
/* setup vertex positions */
verts[0].x = -1.0F;
verts[0].y = -1.0F;
verts[1].x = 1.0F;
verts[1].y = -1.0F;
verts[2].x = 1.0F;
verts[2].y = 1.0F;
verts[3].x = -1.0F;
verts[3].y = 1.0F;
/* texture is already locked, unlock now */
_mesa_unlock_texture(ctx, texObj);
for (dstLevel = baseLevel + 1; dstLevel <= maxLevel; dstLevel++) {
const struct gl_texture_image *srcImage;
struct gl_texture_image *dstImage;
const GLuint srcLevel = dstLevel - 1;
GLuint layer;
GLsizei srcWidth, srcHeight, srcDepth;
GLsizei dstWidth, dstHeight, dstDepth;
srcImage = _mesa_select_tex_image(texObj, faceTarget, srcLevel);
assert(srcImage->Border == 0);
/* src size */
srcWidth = srcImage->Width;
if (target == GL_TEXTURE_1D_ARRAY) {
srcHeight = 1;
srcDepth = srcImage->Height;
} else {
srcHeight = srcImage->Height;
srcDepth = srcImage->Depth;
}
/* new dst size */
dstWidth = minify(srcWidth, 1);
dstHeight = minify(srcHeight, 1);
// dstDepth = target == GL_TEXTURE_3D ? minify(srcDepth, 1) : srcDepth;
dstDepth = srcDepth;
if (dstWidth == srcWidth &&
dstHeight == srcHeight &&
dstDepth == srcDepth) {
/* all done */
break;
}
/* Allocate storage for the destination mipmap image(s) */
/* Set MaxLevel large enough to hold the new level when we allocate it */
glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, dstLevel);
if (!prepare_mipmap_level(ctx, texObj, dstLevel,
dstWidth, dstHeight, dstDepth,
srcImage->InternalFormat,
srcImage->TexFormat)) {
/* All done. We either ran out of memory or we would go beyond the
* last valid level of an immutable texture if we continued.
*/
break;
}
dstImage = _mesa_select_tex_image(texObj, faceTarget, dstLevel);
/* limit minification to src level */
glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
/* setup viewport */
_mesa_set_viewport(ctx, 0, 0, 0, dstWidth, dstHeight);
glDrawBuffer(GL_COLOR_ATTACHMENT0);
for (layer = 0; layer < dstDepth; ++layer) {
/* Setup texture coordinates */
_mesa_meta_setup_texture_coords(faceTarget,
layer,
0, 0, 1, /* width, height never used here */
verts[0].tex,
verts[1].tex,
verts[2].tex,
verts[3].tex);
/* upload vertex data */
glBufferData(GL_ARRAY_BUFFER, sizeof(verts),
verts, GL_DYNAMIC_DRAW);
_mesa_meta_bind_fbo_image(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, dstImage, layer);
/* sanity check */
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
GL_FRAMEBUFFER_COMPLETE) {
_mesa_problem(ctx, "Unexpected incomplete framebuffer in "
"_mesa_meta_GenerateMipmap()");
break;
}
assert(dstWidth == ctx->DrawBuffer->Width);
if (target == GL_TEXTURE_1D_ARRAY) {
assert(dstHeight == 1);
} else {
assert(dstHeight == ctx->DrawBuffer->Height);
}
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
}
}
_mesa_lock_texture(ctx, texObj); /* relock */
glBindSampler(ctx->Texture.CurrentUnit, samplerSave);
_mesa_meta_end(ctx);
glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
if (genMipmapSave)
glTexParameteri(target, GL_GENERATE_MIPMAP, genMipmapSave);
// if (swizzleSaved)
// glTexParameteriv(target, GL_TEXTURE_SWIZZLE_RGBA, swizzle);
}
/**
* Called via ctx->Driver.GenerateMipmap()
* Note: We don't yet support 3D textures, or texture borders.
*/
void
_mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
struct gl_texture_object *texObj)
{
struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;
struct vertex verts[4];
const GLuint baseLevel = texObj->BaseLevel;
const GLuint maxLevel = texObj->MaxLevel;
const GLint maxLevelSave = texObj->MaxLevel;
const GLboolean genMipmapSave = texObj->GenerateMipmap;
const GLboolean use_glsl_version = ctx->Extensions.ARB_vertex_shader &&
ctx->Extensions.ARB_fragment_shader;
GLenum faceTarget;
GLuint dstLevel;
struct gl_sampler_object *samp_obj_save = NULL;
GLint swizzle[4];
GLboolean swizzleSaved = GL_FALSE;
/* GLint so the compiler won't complain about type signedness mismatch in
* the calls to _mesa_texture_parameteriv below.
*/
static const GLint always_false = GL_FALSE;
static const GLint always_true = GL_TRUE;
if (fallback_required(ctx, target, texObj)) {
_mesa_generate_mipmap(ctx, target, texObj);
return;
}
if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) {
faceTarget = target;
target = GL_TEXTURE_CUBE_MAP;
} else {
faceTarget = target;
}
_mesa_meta_begin(ctx, MESA_META_ALL & ~MESA_META_DRAW_BUFFERS);
_mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
/* Choose between glsl version and fixed function version of
* GenerateMipmap function.
*/
if (use_glsl_version) {
_mesa_meta_setup_vertex_objects(ctx, &mipmap->VAO, &mipmap->buf_obj, true,
2, 4, 0);
_mesa_meta_setup_blit_shader(ctx, target, false, &mipmap->shaders);
} else {
_mesa_meta_setup_ff_tnl_for_blit(ctx, &mipmap->VAO, &mipmap->buf_obj, 3);
_mesa_set_enable(ctx, target, GL_TRUE);
}
_mesa_reference_sampler_object(ctx, &samp_obj_save,
ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler);
/* We may have been called from glGenerateTextureMipmap with CurrentUnit
* still set to 0, so we don't know when we can skip binding the texture.
* Assume that _mesa_BindTexture will be fast if we're rebinding the same
* texture.
*/
_mesa_BindTexture(target, texObj->Name);
if (mipmap->samp_obj == NULL) {
mipmap->samp_obj = ctx->Driver.NewSamplerObject(ctx, 0xDEADBEEF);
if (mipmap->samp_obj == NULL) {
/* This is a bit lazy. Flag out of memory, and then don't bother to
* clean up. Once out of memory is flagged, the only realistic next
* move is to destroy the context. That will trigger all the right
* clean up.
*/
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenerateMipmap");
return;
}
_mesa_set_sampler_filters(ctx, mipmap->samp_obj, GL_LINEAR_MIPMAP_LINEAR,
GL_LINEAR);
_mesa_set_sampler_wrap(ctx, mipmap->samp_obj, GL_CLAMP_TO_EDGE,
GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE);
/* We don't want to encode or decode sRGB values; treat them as linear. */
_mesa_set_sampler_srgb_decode(ctx, mipmap->samp_obj, GL_SKIP_DECODE_EXT);
}
_mesa_bind_sampler(ctx, ctx->Texture.CurrentUnit, mipmap->samp_obj);
assert(mipmap->fb != NULL);
_mesa_bind_framebuffers(ctx, mipmap->fb, mipmap->fb);
_mesa_texture_parameteriv(ctx, texObj, GL_GENERATE_MIPMAP, &always_false, false);
if (texObj->_Swizzle != SWIZZLE_NOOP) {
static const GLint swizzleNoop[4] = { GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA };
memcpy(swizzle, texObj->Swizzle, sizeof(swizzle));
swizzleSaved = GL_TRUE;
_mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_SWIZZLE_RGBA,
swizzleNoop, false);
}
/* Silence valgrind warnings about reading uninitialized stack. */
memset(verts, 0, sizeof(verts));
/* setup vertex positions */
verts[0].x = -1.0F;
verts[0].y = -1.0F;
verts[1].x = 1.0F;
verts[1].y = -1.0F;
verts[2].x = 1.0F;
verts[2].y = 1.0F;
verts[3].x = -1.0F;
verts[3].y = 1.0F;
/* texture is already locked, unlock now */
_mesa_unlock_texture(ctx, texObj);
_mesa_prepare_mipmap_levels(ctx, texObj, baseLevel, maxLevel);
for (dstLevel = baseLevel + 1; dstLevel <= maxLevel; dstLevel++) {
const struct gl_texture_image *srcImage;
struct gl_texture_image *dstImage;
const GLuint srcLevel = dstLevel - 1;
GLuint layer;
GLsizei srcWidth, srcHeight, srcDepth;
GLsizei dstWidth, dstHeight, dstDepth;
srcImage = _mesa_select_tex_image(texObj, faceTarget, srcLevel);
assert(srcImage->Border == 0);
/* src size */
srcWidth = srcImage->Width;
if (target == GL_TEXTURE_1D_ARRAY) {
srcHeight = 1;
srcDepth = srcImage->Height;
} else {
srcHeight = srcImage->Height;
srcDepth = srcImage->Depth;
}
/* new dst size */
dstWidth = minify(srcWidth, 1);
dstHeight = minify(srcHeight, 1);
dstDepth = target == GL_TEXTURE_3D ? minify(srcDepth, 1) : srcDepth;
if (dstWidth == srcWidth &&
dstHeight == srcHeight &&
dstDepth == srcDepth) {
/* all done */
break;
}
/* Allocate storage for the destination mipmap image(s) */
/* Set MaxLevel large enough to hold the new level when we allocate it */
_mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL,
(GLint *) &dstLevel, false);
dstImage = _mesa_select_tex_image(texObj, faceTarget, dstLevel);
/* All done. We either ran out of memory or we would go beyond the last
* valid level of an immutable texture if we continued.
*/
if (dstImage == NULL)
break;
/* limit minification to src level */
_mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL,
(GLint *) &srcLevel, false);
/* setup viewport */
_mesa_set_viewport(ctx, 0, 0, 0, dstWidth, dstHeight);
_mesa_DrawBuffer(GL_COLOR_ATTACHMENT0);
for (layer = 0; layer < dstDepth; ++layer) {
/* Setup texture coordinates */
_mesa_meta_setup_texture_coords(faceTarget,
layer,
0, 0, /* xoffset, yoffset */
srcWidth, srcHeight, /* img size */
srcWidth, srcHeight, srcDepth,
verts[0].tex,
verts[1].tex,
verts[2].tex,
verts[3].tex);
/* upload vertex data */
_mesa_buffer_data(ctx, mipmap->buf_obj, GL_NONE, sizeof(verts), verts,
GL_DYNAMIC_DRAW, __func__);
_mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer,
GL_COLOR_ATTACHMENT0, dstImage,
layer);
/* sanity check */
if (_mesa_check_framebuffer_status(ctx, ctx->DrawBuffer) !=
GL_FRAMEBUFFER_COMPLETE) {
_mesa_problem(ctx, "Unexpected incomplete framebuffer in "
"_mesa_meta_GenerateMipmap()");
break;
}
assert(dstWidth == ctx->DrawBuffer->Width);
if (target == GL_TEXTURE_1D_ARRAY) {
assert(dstHeight == 1);
} else {
assert(dstHeight == ctx->DrawBuffer->Height);
}
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
}
}
_mesa_lock_texture(ctx, texObj); /* relock */
_mesa_bind_sampler(ctx, ctx->Texture.CurrentUnit, samp_obj_save);
_mesa_reference_sampler_object(ctx, &samp_obj_save, NULL);
_mesa_meta_end(ctx);
_mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL, &maxLevelSave,
false);
if (genMipmapSave)
_mesa_texture_parameteriv(ctx, texObj, GL_GENERATE_MIPMAP, &always_true,
false);
if (swizzleSaved)
_mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_SWIZZLE_RGBA, swizzle,
false);
}