From a63c8a524b01e802cf2505099f930c0cb97df0b2 Mon Sep 17 00:00:00 2001 From: Kalyan Kondapally Date: Wed, 7 Jan 2015 20:30:25 -0800 Subject: Mesa: Add support for GL_OES_texture_*float* extensions. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch series adds support for following GLES2 Texture Float extensions: 1)GL_OES_texture_float, 2)GL_OES_texture_half_float, 3)GL_OES_texture_float_linear, 4)GL_OES_texture_half_float_linear. This patch adds basic infrastructure and needed boolean flags to advertise support for these extensions, by default the support is disabled. Next patch in the series introduces support for HALF_FLOAT_OES token. v4: take assert away and make valid_filter_for_float conditional (Tapani), fix the alphabetical order (Emil) Signed-off-by: Kevin Rogovin Signed-off-by: Kalyan Kondapally Reviewed-by: Tapani Pälli --- src/mesa/main/extensions.c | 4 +++ src/mesa/main/mtypes.h | 6 +++++ src/mesa/main/teximage.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++ src/mesa/main/texobj.c | 58 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 132 insertions(+) diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c index 16f12418ee9..bfe7d991b52 100644 --- a/src/mesa/main/extensions.c +++ b/src/mesa/main/extensions.c @@ -317,6 +317,10 @@ static const struct extension extension_table[] = { { "GL_OES_texture_3D", o(EXT_texture3D), ES2, 2005 }, { "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1, 2007 }, { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1, 2005 }, + { "GL_OES_texture_float", o(OES_texture_float), ES2, 2005 }, + { "GL_OES_texture_float_linear", o(OES_texture_float_linear), ES2, 2005 }, + { "GL_OES_texture_half_float", o(OES_texture_half_float), ES2, 2005 }, + { "GL_OES_texture_half_float_linear", o(OES_texture_half_float_linear), ES2, 2005 }, { "GL_OES_texture_mirrored_repeat", o(dummy_true), ES1, 2005 }, { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES1 | ES2, 2005 }, { "GL_OES_vertex_array_object", o(dummy_true), ES1 | ES2, 2010 }, diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index 145927a4f44..81a7c0eb4eb 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -1220,6 +1220,8 @@ struct gl_texture_object GLboolean Purgeable; /**< Is the buffer purgeable under memory pressure? */ GLboolean Immutable; /**< GL_ARB_texture_storage */ + GLboolean _IsFloat; /**< GL_OES_float_texture */ + GLboolean _IsHalfFloat; /**< GL_OES_half_float_texture */ GLuint MinLevel; /**< GL_ARB_texture_view */ GLuint MinLayer; /**< GL_ARB_texture_view */ @@ -3859,6 +3861,10 @@ struct gl_extensions GLboolean OES_draw_texture; GLboolean OES_depth_texture_cube_map; GLboolean OES_EGL_image_external; + GLboolean OES_texture_float; + GLboolean OES_texture_float_linear; + GLboolean OES_texture_half_float; + GLboolean OES_texture_half_float_linear; GLboolean OES_compressed_ETC1_RGB8_texture; GLboolean extension_sentinel; /** The extension string */ diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c index 5ada94f1ffd..ed08ddb4f42 100644 --- a/src/mesa/main/teximage.c +++ b/src/mesa/main/teximage.c @@ -62,7 +62,58 @@ */ #define NEW_COPY_TEX_STATE (_NEW_BUFFERS | _NEW_PIXEL) +/** + * Returns a corresponding internal floating point format for a given base + * format as specifed by OES_texture_float. In case of GL_FLOAT, the internal + * format needs to be a 32 bit component and in case of GL_HALF_FLOAT_OES it + * needs to be a 16 bit component. + * + * For example, given base format GL_RGBA, type GL_Float return GL_RGBA32F_ARB. + */ +static GLenum +adjust_for_oes_float_texture(GLenum format, GLenum type) +{ + switch (type) { + case GL_FLOAT: + switch (format) { + case GL_RGBA: + return GL_RGBA32F; + case GL_RGB: + return GL_RGB32F; + case GL_ALPHA: + return GL_ALPHA32F_ARB; + case GL_LUMINANCE: + return GL_LUMINANCE32F_ARB; + case GL_LUMINANCE_ALPHA: + return GL_LUMINANCE_ALPHA32F_ARB; + default: + break; + } + break; + case GL_HALF_FLOAT_OES: + switch (format) { + case GL_RGBA: + return GL_RGBA16F; + case GL_RGB: + return GL_RGB16F; + case GL_ALPHA: + return GL_ALPHA16F_ARB; + case GL_LUMINANCE: + return GL_LUMINANCE16F_ARB; + case GL_LUMINANCE_ALPHA: + return GL_LUMINANCE_ALPHA16F_ARB; + default: + break; + } + break; + + default: + break; + } + + return format; +} /** * Return the simple base format for a given internal texture format. @@ -3182,6 +3233,19 @@ teximage(struct gl_context *ctx, GLboolean compressed, GLuint dims, texFormat = _mesa_glenum_to_compressed_format(internalFormat); } else { + /* In case of HALF_FLOAT_OES or FLOAT_OES, find corresponding sized + * internal floating point format for the given base format. + */ + if (_mesa_is_gles(ctx) && format == internalFormat) { + if (type == GL_FLOAT) { + texObj->_IsFloat = GL_TRUE; + } else if (type == GL_HALF_FLOAT_OES || type == GL_HALF_FLOAT) { + texObj->_IsHalfFloat = GL_TRUE; + } + + internalFormat = adjust_for_oes_float_texture(format, type); + } + texFormat = _mesa_choose_texture_format(ctx, texObj, target, level, internalFormat, format, type); } diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c index a99dd7ad7c7..59090db4ecf 100644 --- a/src/mesa/main/texobj.c +++ b/src/mesa/main/texobj.c @@ -49,6 +49,54 @@ /** \name Internal functions */ /*@{*/ +/** + * This function checks for all valid combinations of Min and Mag filters for + * Float types, when extensions like OES_texture_float and + * OES_texture_float_linear are supported. OES_texture_float mentions support + * for NEAREST, NEAREST_MIPMAP_NEAREST magnification and minification filters. + * Mag filters like LINEAR and min filters like NEAREST_MIPMAP_LINEAR, + * LINEAR_MIPMAP_NEAREST and LINEAR_MIPMAP_LINEAR are only valid in case + * OES_texture_float_linear is supported. + * + * Returns true in case the filter is valid for given Float type else false. + */ +static bool +valid_filter_for_float(const struct gl_context *ctx, + const struct gl_texture_object *obj) +{ + switch (obj->Sampler.MagFilter) { + case GL_LINEAR: + if (obj->_IsHalfFloat && !ctx->Extensions.OES_texture_half_float_linear) { + return false; + } else if (obj->_IsFloat && !ctx->Extensions.OES_texture_float_linear) { + return false; + } + case GL_NEAREST: + case GL_NEAREST_MIPMAP_NEAREST: + break; + default: + unreachable("Invalid mag filter"); + } + + switch (obj->Sampler.MinFilter) { + case GL_LINEAR: + case GL_NEAREST_MIPMAP_LINEAR: + case GL_LINEAR_MIPMAP_NEAREST: + case GL_LINEAR_MIPMAP_LINEAR: + if (obj->_IsHalfFloat && !ctx->Extensions.OES_texture_half_float_linear) { + return false; + } else if (obj->_IsFloat && !ctx->Extensions.OES_texture_float_linear) { + return false; + } + case GL_NEAREST: + case GL_NEAREST_MIPMAP_NEAREST: + break; + default: + unreachable("Invalid min filter"); + } + + return true; +} /** * Return the gl_texture_object for a given ID. @@ -408,6 +456,8 @@ _mesa_copy_texture_object( struct gl_texture_object *dest, dest->_MipmapComplete = src->_MipmapComplete; COPY_4V(dest->Swizzle, src->Swizzle); dest->_Swizzle = src->_Swizzle; + dest->_IsHalfFloat = src->_IsHalfFloat; + dest->_IsFloat = src->_IsFloat; dest->RequiredTextureImageUnits = src->RequiredTextureImageUnits; } @@ -641,6 +691,14 @@ _mesa_test_texobj_completeness( const struct gl_context *ctx, t->_IsIntegerFormat = datatype == GL_INT || datatype == GL_UNSIGNED_INT; } + /* Check if the texture type is Float or HalfFloatOES and ensure Min and Mag + * filters are supported in this case. + */ + if (_mesa_is_gles(ctx) && !valid_filter_for_float(ctx, t)) { + incomplete(t, BASE, "Filter is not supported with Float types."); + return; + } + /* Compute _MaxLevel (the maximum mipmap level we'll sample from given the * mipmap image sizes and GL_TEXTURE_MAX_LEVEL state). */ -- cgit v1.2.3