diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_formatquery.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_formatquery.c b/src/mesa/drivers/dri/i965/brw_formatquery.c index 576e36fcae3..210109b39f7 100644 --- a/src/mesa/drivers/dri/i965/brw_formatquery.c +++ b/src/mesa/drivers/dri/i965/brw_formatquery.c @@ -22,7 +22,9 @@ */ #include "brw_context.h" +#include "brw_state.h" #include "main/formatquery.h" +#include "main/glformats.h" static size_t brw_query_samples_for_format(struct gl_context *ctx, GLenum target, @@ -63,6 +65,46 @@ brw_query_samples_for_format(struct gl_context *ctx, GLenum target, } } +/** + * Returns a generic GL type from an internal format, so that it can be used + * together with the base format to obtain a mesa_format by calling + * mesa_format_from_format_and_type(). + */ +static GLenum +get_generic_type_for_internal_format(GLenum internalFormat) +{ + if (_mesa_is_color_format(internalFormat)) { + if (_mesa_is_enum_format_unsigned_int(internalFormat)) + return GL_UNSIGNED_BYTE; + else if (_mesa_is_enum_format_signed_int(internalFormat)) + return GL_BYTE; + } else { + switch (internalFormat) { + case GL_STENCIL_INDEX: + case GL_STENCIL_INDEX8: + return GL_UNSIGNED_BYTE; + case GL_DEPTH_COMPONENT: + case GL_DEPTH_COMPONENT16: + return GL_UNSIGNED_SHORT; + case GL_DEPTH_COMPONENT24: + case GL_DEPTH_COMPONENT32: + return GL_UNSIGNED_INT; + case GL_DEPTH_COMPONENT32F: + return GL_FLOAT; + case GL_DEPTH_STENCIL: + case GL_DEPTH24_STENCIL8: + return GL_UNSIGNED_INT_24_8; + case GL_DEPTH32F_STENCIL8: + return GL_FLOAT_32_UNSIGNED_INT_24_8_REV; + default: + /* fall-through */ + break; + } + } + + return GL_FLOAT; +} + void brw_query_internal_format(struct gl_context *ctx, GLenum target, GLenum internalFormat, GLenum pname, GLint *params) @@ -87,6 +129,37 @@ brw_query_internal_format(struct gl_context *ctx, GLenum target, break; } + case GL_INTERNALFORMAT_PREFERRED: { + params[0] = GL_NONE; + + /* We need to resolve an internal format that is compatible with + * the passed internal format, and optimal to the driver. By now, + * we just validate that the passed internal format is supported by + * the driver, and if so return the same internal format, otherwise + * return GL_NONE. + * + * For validating the internal format, we use the + * ctx->TextureFormatSupported map to check that a BRW surface format + * exists, that can be derived from the internal format. But this + * expects a mesa_format, not an internal format. So we need to "come up" + * with a type that is generic enough, to resolve the mesa_format first. + */ + GLenum type = get_generic_type_for_internal_format(internalFormat); + + /* Get a mesa_format from the internal format and type. */ + GLint base_format = _mesa_base_tex_format(ctx, internalFormat); + if (base_format != -1) { + mesa_format mesa_format = + _mesa_format_from_format_and_type(base_format, type); + + if (mesa_format < MESA_FORMAT_COUNT && + ctx->TextureFormatSupported[mesa_format]) { + params[0] = internalFormat; + } + } + break; + } + default: /* By default, we call the driver hook's fallback function from the frontend, * which has generic implementation for all pnames. |